diff --git a/.gitignore b/.gitignore
index 8511834..c1baf38 100644
--- a/.gitignore
+++ b/.gitignore
@@ -8,5 +8,6 @@
 cmake-build/
 nearby/presence/lib/
 target/
-nearby/connections/ukey2/ukey2_c_ffi/cpp/build
+nearby/connections/ukey2/ukey2_c_ffi/cpp/build/
+nearby/presence/ldt_np_jni/java/LdtNpJni/build/
 **/auth_token.txt
diff --git a/nearby/.cargo/config-boringssl.toml b/nearby/.cargo/config-boringssl.toml
index d0870ce..bab3518 100644
--- a/nearby/.cargo/config-boringssl.toml
+++ b/nearby/.cargo/config-boringssl.toml
@@ -1,6 +1,7 @@
 # The packages to override
 paths = [
-    "../boringssl-build/boringssl/build/rust/bssl-sys",
+    "../boringssl-build/boringssl/rust/bssl-crypto",
+    "../boringssl-build/boringssl/rust/bssl-sys",
     "../boringssl-build/rust-openssl/openssl",
     "../boringssl-build/rust-openssl/openssl-sys",
 ]
diff --git a/nearby/.cargo/config.toml b/nearby/.cargo/config.toml
index 4cce14e..b06c65f 100644
--- a/nearby/.cargo/config.toml
+++ b/nearby/.cargo/config.toml
@@ -1,2 +1,16 @@
 [env]
-WORKSPACE_DIR = { value = "", relative = true }
\ No newline at end of file
+WORKSPACE_DIR = { value = "", relative = true }
+
+# Needed for mlua per https://github.com/khvzak/mlua#module-mode
+[target.x86_64-apple-darwin]
+rustflags = [
+  "-C", "link-arg=-undefined",
+  "-C", "link-arg=dynamic_lookup",
+]
+
+# Needed for mlua per https://github.com/khvzak/mlua#module-mode
+[target.aarch64-apple-darwin]
+rustflags = [
+  "-C", "link-arg=-undefined",
+  "-C", "link-arg=dynamic_lookup",
+]
diff --git a/nearby/.dockerignore b/nearby/.dockerignore
index 5d11fb7..8bd0a19 100644
--- a/nearby/.dockerignore
+++ b/nearby/.dockerignore
@@ -9,9 +9,9 @@
 /presence/*/fuzz/target
 /presence/*/fuzz/corpus
 /presence/cmake-build
-/presence/CMakeCache.txt
-/presence/CMakeFiles
-/presence/ldt_np_c_sample/CMakeFiles
 /connections/ukey2/*/fuzz/target
 /connections/ukey2/*/fuzz/corpus
 /crypto/crypto_provider_boringssl/target
+
+**/CMakeCache.txt
+**/CMakeFiles
diff --git a/nearby/Cargo.lock b/nearby/Cargo.lock
index 25a6104..63c63ac 100644
--- a/nearby/Cargo.lock
+++ b/nearby/Cargo.lock
@@ -53,6 +53,15 @@
 
 [[package]]
 name = "aho-corasick"
+version = "0.7.20"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "cc936419f96fa211c1b9166887b38e5e40b19958e5b895be7c1f93adec7071ac"
+dependencies = [
+ "memchr",
+]
+
+[[package]]
+name = "aho-corasick"
 version = "1.0.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "67fc08ce920c31afb70f013dcce1bfc3a3195de6a228474e45e1f145b36f8d04"
@@ -67,6 +76,21 @@
 checksum = "250f629c0161ad8107cf89319e990051fae62832fd343083bea452d93e2205fd"
 
 [[package]]
+name = "android-tzdata"
+version = "0.1.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e999941b234f3131b00bc13c22d06e8c5ff726d1b6318ac7eb276997bbb4fef0"
+
+[[package]]
+name = "android_system_properties"
+version = "0.1.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "819e7219dbd41043ac279b19830f2efc897156490d7fd6ea916720117ee66311"
+dependencies = [
+ "libc",
+]
+
+[[package]]
 name = "anes"
 version = "0.1.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -220,6 +244,38 @@
 checksum = "312d12393c060384f2e6ed14c7b4be37b3dd90249857485613c1a91b9a1abb5c"
 
 [[package]]
+name = "bstr"
+version = "1.5.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a246e68bb43f6cd9db24bea052a53e40405417c5fb372e3d1a8a7f770a564ef5"
+dependencies = [
+ "memchr",
+ "serde",
+]
+
+[[package]]
+name = "build-scripts"
+version = "0.1.0"
+dependencies = [
+ "anyhow",
+ "base64 0.21.0",
+ "chrono",
+ "clap 4.2.7",
+ "crossbeam",
+ "env_logger",
+ "globset",
+ "log",
+ "owo-colors",
+ "reqwest",
+ "semver",
+ "shell-escape",
+ "tempfile",
+ "thiserror",
+ "tinytemplate",
+ "walkdir",
+]
+
+[[package]]
 name = "bumpalo"
 version = "3.12.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -271,6 +327,18 @@
 checksum = "baf1de4339761588bc0619e3cbc0120ee582ebb74b53b4efbf79117bd2da40fd"
 
 [[package]]
+name = "chrono"
+version = "0.4.26"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ec837a71355b28f6556dbd569b37b3f363091c0bd4b2e735674521b4c5fd9bc5"
+dependencies = [
+ "android-tzdata",
+ "iana-time-zone",
+ "num-traits",
+ "winapi",
+]
+
+[[package]]
 name = "ciborium"
 version = "0.2.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -393,6 +461,12 @@
 checksum = "520fbf3c07483f94e3e3ca9d0cfd913d7718ef2483d2cfd91c0d9e91474ab913"
 
 [[package]]
+name = "core-foundation-sys"
+version = "0.8.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e496a50fda8aacccc86d7529e2c1e0892dbd0f898a6b5645b5561b89c3210efa"
+
+[[package]]
 name = "cpufeatures"
 version = "0.2.7"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -447,6 +521,20 @@
 ]
 
 [[package]]
+name = "crossbeam"
+version = "0.8.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2801af0d36612ae591caa9568261fddce32ce6e08a7275ea334a06a4ad021a2c"
+dependencies = [
+ "cfg-if",
+ "crossbeam-channel",
+ "crossbeam-deque",
+ "crossbeam-epoch",
+ "crossbeam-queue",
+ "crossbeam-utils",
+]
+
+[[package]]
 name = "crossbeam-channel"
 version = "0.5.8"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -481,6 +569,16 @@
 ]
 
 [[package]]
+name = "crossbeam-queue"
+version = "0.3.8"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d1cfb3ea8a53f37c40dea2c7bedcbd88bdfae54f5e2175d6ecaff1c988353add"
+dependencies = [
+ "cfg-if",
+ "crossbeam-utils",
+]
+
+[[package]]
 name = "crossbeam-utils"
 version = "0.8.15"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -550,6 +648,7 @@
 dependencies = [
  "cfg-if",
  "crypto_provider",
+ "crypto_provider_stubs",
  "crypto_provider_test",
  "hex-literal",
  "openssl",
@@ -718,6 +817,28 @@
 ]
 
 [[package]]
+name = "encoding_rs"
+version = "0.8.32"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "071a31f4ee85403370b58aca746f01041ede6f0da2730960ad001edc2b71b394"
+dependencies = [
+ "cfg-if",
+]
+
+[[package]]
+name = "env_logger"
+version = "0.10.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "85cdab6a89accf66733ad5a1693a4dcced6aeff64602b634530dd73c1f3ee9f0"
+dependencies = [
+ "humantime",
+ "is-terminal",
+ "log",
+ "regex",
+ "termcolor",
+]
+
+[[package]]
 name = "errno"
 version = "0.3.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -774,6 +895,12 @@
 ]
 
 [[package]]
+name = "fnv"
+version = "1.0.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3f9eec918d3f24069decb9af1554cad7c880e2da24a9afd88aca000531ab82c1"
+
+[[package]]
 name = "foreign-types"
 version = "0.3.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -789,6 +916,15 @@
 checksum = "00b0228411908ca8685dba7fc2cdd70ec9990a6e753e89b6ac91a84c40fbaf4b"
 
 [[package]]
+name = "form_urlencoded"
+version = "1.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a62bc1cf6f830c2ec14a513a9fb124d0a213a629668a4186f329db21fe045652"
+dependencies = [
+ "percent-encoding",
+]
+
+[[package]]
 name = "futures"
 version = "0.3.28"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -906,6 +1042,19 @@
 ]
 
 [[package]]
+name = "globset"
+version = "0.4.10"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "029d74589adefde59de1a0c4f4732695c32805624aec7b68d91503d4dba79afc"
+dependencies = [
+ "aho-corasick 0.7.20",
+ "bstr",
+ "fnv",
+ "log",
+ "regex",
+]
+
+[[package]]
 name = "group"
 version = "0.13.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -917,6 +1066,25 @@
 ]
 
 [[package]]
+name = "h2"
+version = "0.3.19"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d357c7ae988e7d2182f7d7871d0b963962420b0678b0997ce7de72001aeab782"
+dependencies = [
+ "bytes",
+ "fnv",
+ "futures-core",
+ "futures-sink",
+ "futures-util",
+ "http",
+ "indexmap",
+ "slab",
+ "tokio",
+ "tokio-util",
+ "tracing",
+]
+
+[[package]]
 name = "half"
 version = "1.8.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -1003,6 +1171,116 @@
 ]
 
 [[package]]
+name = "http"
+version = "0.2.9"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "bd6effc99afb63425aff9b05836f029929e345a6148a14b7ecd5ab67af944482"
+dependencies = [
+ "bytes",
+ "fnv",
+ "itoa",
+]
+
+[[package]]
+name = "http-body"
+version = "0.4.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d5f38f16d184e36f2408a55281cd658ecbd3ca05cce6d6510a176eca393e26d1"
+dependencies = [
+ "bytes",
+ "http",
+ "pin-project-lite",
+]
+
+[[package]]
+name = "httparse"
+version = "1.8.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d897f394bad6a705d5f4104762e116a75639e470d80901eed05a860a95cb1904"
+
+[[package]]
+name = "httpdate"
+version = "1.0.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c4a1e36c821dbe04574f602848a19f742f4fb3c98d40449f11bcad18d6b17421"
+
+[[package]]
+name = "humantime"
+version = "2.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9a3a5bfb195931eeb336b2a7b4d761daec841b97f947d34394601737a7bba5e4"
+
+[[package]]
+name = "hyper"
+version = "0.14.26"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ab302d72a6f11a3b910431ff93aae7e773078c769f0a3ef15fb9ec692ed147d4"
+dependencies = [
+ "bytes",
+ "futures-channel",
+ "futures-core",
+ "futures-util",
+ "h2",
+ "http",
+ "http-body",
+ "httparse",
+ "httpdate",
+ "itoa",
+ "pin-project-lite",
+ "socket2",
+ "tokio",
+ "tower-service",
+ "tracing",
+ "want",
+]
+
+[[package]]
+name = "hyper-rustls"
+version = "0.24.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0646026eb1b3eea4cd9ba47912ea5ce9cc07713d105b1a14698f4e6433d348b7"
+dependencies = [
+ "http",
+ "hyper",
+ "rustls",
+ "tokio",
+ "tokio-rustls",
+]
+
+[[package]]
+name = "iana-time-zone"
+version = "0.1.57"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2fad5b825842d2b38bd206f3e81d6957625fd7f0a361e345c30e01a0ae2dd613"
+dependencies = [
+ "android_system_properties",
+ "core-foundation-sys",
+ "iana-time-zone-haiku",
+ "js-sys",
+ "wasm-bindgen",
+ "windows",
+]
+
+[[package]]
+name = "iana-time-zone-haiku"
+version = "0.1.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f31827a206f56af32e590ba56d5d2d085f558508192593743f16b2306495269f"
+dependencies = [
+ "cc",
+]
+
+[[package]]
+name = "idna"
+version = "0.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7d20d6b07bfbc108882d88ed8e37d39636dcc260e15e30c45e6ba089610b917c"
+dependencies = [
+ "unicode-bidi",
+ "unicode-normalization",
+]
+
+[[package]]
 name = "indexmap"
 version = "1.9.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -1043,6 +1321,12 @@
 ]
 
 [[package]]
+name = "ipnet"
+version = "2.7.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "12b6ee2129af8d4fb011108c73d99a1b83a85977f23b82460c0ae2e25bb4b57f"
+
+[[package]]
 name = "is-terminal"
 version = "0.4.7"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -1161,6 +1445,19 @@
 ]
 
 [[package]]
+name = "ldt_np_jni"
+version = "0.1.0"
+dependencies = [
+ "cfg-if",
+ "crypto_provider",
+ "crypto_provider_default",
+ "jni",
+ "ldt",
+ "ldt_np_adv",
+ "np_hkdf",
+]
+
+[[package]]
 name = "ldt_tbc"
 version = "0.1.0"
 dependencies = [
@@ -1186,6 +1483,13 @@
 checksum = "ece97ea872ece730aed82664c424eb4c8291e1ff2480247ccf7409044bc6479f"
 
 [[package]]
+name = "lock_adapter"
+version = "0.1.0"
+dependencies = [
+ "spin 0.9.8",
+]
+
+[[package]]
 name = "lock_api"
 version = "0.4.9"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -1220,6 +1524,12 @@
 ]
 
 [[package]]
+name = "mime"
+version = "0.3.17"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6877bb514081ee2a7ff5ef9de3281f14a4dd4bceac4c09388074a6b5df8a139a"
+
+[[package]]
 name = "minimal-lexical"
 version = "0.2.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -1235,6 +1545,17 @@
 ]
 
 [[package]]
+name = "mio"
+version = "0.8.8"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "927a765cd3fc26206e66b296465fa9d3e5ab003e651c1b3c060e7956d96b19d2"
+dependencies = [
+ "libc",
+ "wasi",
+ "windows-sys 0.48.0",
+]
+
+[[package]]
 name = "nom"
 version = "7.1.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -1388,6 +1709,12 @@
 ]
 
 [[package]]
+name = "owo-colors"
+version = "3.5.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c1b04fb49957986fdce4d6ee7a65027d55d4b6d2265e5848bbb507b58ccfdb6f"
+
+[[package]]
 name = "p256"
 version = "0.13.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -1408,6 +1735,12 @@
 ]
 
 [[package]]
+name = "percent-encoding"
+version = "2.3.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9b2a4787296e9989611394c33f193f676704af1686e70b8f8033ab5ba9a35a94"
+
+[[package]]
 name = "pin-project-lite"
 version = "0.2.9"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -1653,12 +1986,6 @@
 ]
 
 [[package]]
-name = "raw-parts"
-version = "1.1.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b1e22ce49f28be0887a992cf42172c8c75facdb74e3e1a7eb0f459cf2fcc95d7"
-
-[[package]]
 name = "rayon"
 version = "1.7.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -1695,7 +2022,7 @@
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "af83e617f331cc6ae2da5443c602dfa5af81e517212d9d611a5b3ba1777b5370"
 dependencies = [
- "aho-corasick",
+ "aho-corasick 1.0.1",
  "memchr",
  "regex-syntax",
 ]
@@ -1707,6 +2034,60 @@
 checksum = "a5996294f19bd3aae0453a862ad728f60e6600695733dd5df01da90c54363a3c"
 
 [[package]]
+name = "reqwest"
+version = "0.11.18"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "cde824a14b7c14f85caff81225f411faacc04a2013f41670f41443742b1c1c55"
+dependencies = [
+ "base64 0.21.0",
+ "bytes",
+ "encoding_rs",
+ "futures-core",
+ "futures-util",
+ "h2",
+ "http",
+ "http-body",
+ "hyper",
+ "hyper-rustls",
+ "ipnet",
+ "js-sys",
+ "log",
+ "mime",
+ "once_cell",
+ "percent-encoding",
+ "pin-project-lite",
+ "rustls",
+ "rustls-pemfile",
+ "serde",
+ "serde_json",
+ "serde_urlencoded",
+ "tokio",
+ "tokio-rustls",
+ "tower-service",
+ "url",
+ "wasm-bindgen",
+ "wasm-bindgen-futures",
+ "web-sys",
+ "webpki-roots",
+ "winreg",
+]
+
+[[package]]
+name = "ring"
+version = "0.16.20"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3053cf52e236a3ed746dfc745aa9cacf1b791d846bdaf412f60a8d7d6e17c8fc"
+dependencies = [
+ "cc",
+ "libc",
+ "once_cell",
+ "spin 0.5.2",
+ "untrusted",
+ "web-sys",
+ "winapi",
+]
+
+[[package]]
 name = "rstest"
 version = "0.16.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -1768,6 +2149,37 @@
 ]
 
 [[package]]
+name = "rustls"
+version = "0.21.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e32ca28af694bc1bbf399c33a516dbdf1c90090b8ab23c2bc24f834aa2247f5f"
+dependencies = [
+ "log",
+ "ring",
+ "rustls-webpki",
+ "sct",
+]
+
+[[package]]
+name = "rustls-pemfile"
+version = "1.0.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d194b56d58803a43635bdc398cd17e383d6f71f9182b9a192c127ca42494a59b"
+dependencies = [
+ "base64 0.21.0",
+]
+
+[[package]]
+name = "rustls-webpki"
+version = "0.100.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d6207cd5ed3d8dca7816f8f3725513a34609c0c765bf652b8c3cb4cfd87db46b"
+dependencies = [
+ "ring",
+ "untrusted",
+]
+
+[[package]]
 name = "ryu"
 version = "1.0.13"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -1789,6 +2201,16 @@
 checksum = "d29ab0c6d3fc0ee92fe66e2d99f700eab17a8d57d1c1d3b748380fb20baa78cd"
 
 [[package]]
+name = "sct"
+version = "0.7.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d53dcdb7c9f8158937a7981b48accfd39a43af418591a5d008c7b22b5e1b7ca4"
+dependencies = [
+ "ring",
+ "untrusted",
+]
+
+[[package]]
 name = "sec1"
 version = "0.7.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -1839,6 +2261,18 @@
 ]
 
 [[package]]
+name = "serde_urlencoded"
+version = "0.7.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d3491c14715ca2294c4d6a88f15e84739788c1d030eed8c110436aafdaa2f3fd"
+dependencies = [
+ "form_urlencoded",
+ "itoa",
+ "ryu",
+ "serde",
+]
+
+[[package]]
 name = "sha2"
 version = "0.10.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -1850,6 +2284,12 @@
 ]
 
 [[package]]
+name = "shell-escape"
+version = "0.1.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "45bb67a18fa91266cc7807181f62f9178a6873bfad7dc788c42e6430db40184f"
+
+[[package]]
 name = "signature"
 version = "2.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -1865,6 +2305,16 @@
 ]
 
 [[package]]
+name = "socket2"
+version = "0.4.9"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "64a4a911eed85daf18834cfaa86a79b7d266ff93ff5ba14005426219480ed662"
+dependencies = [
+ "libc",
+ "winapi",
+]
+
+[[package]]
 name = "spin"
 version = "0.5.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -1937,6 +2387,15 @@
 ]
 
 [[package]]
+name = "termcolor"
+version = "1.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "be55cf8942feac5c765c2c993422806843c9a9a45d4d5c407ad6dd2ea95eb9b6"
+dependencies = [
+ "winapi-util",
+]
+
+[[package]]
 name = "test_helper"
 version = "0.1.0"
 dependencies = [
@@ -1981,6 +2440,93 @@
 ]
 
 [[package]]
+name = "tinyvec"
+version = "1.6.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "87cc5ceb3875bb20c2890005a4e226a4651264a5c75edb2421b52861a0a0cb50"
+dependencies = [
+ "tinyvec_macros",
+]
+
+[[package]]
+name = "tinyvec_macros"
+version = "0.1.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1f3ccbac311fea05f86f61904b462b55fb3df8837a366dfc601a0161d0532f20"
+
+[[package]]
+name = "tokio"
+version = "1.28.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "94d7b1cfd2aa4011f2de74c2c4c63665e27a71006b0a192dcd2710272e73dfa2"
+dependencies = [
+ "autocfg",
+ "bytes",
+ "libc",
+ "mio",
+ "num_cpus",
+ "pin-project-lite",
+ "socket2",
+ "windows-sys 0.48.0",
+]
+
+[[package]]
+name = "tokio-rustls"
+version = "0.24.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c28327cf380ac148141087fbfb9de9d7bd4e84ab5d2c28fbc911d753de8a7081"
+dependencies = [
+ "rustls",
+ "tokio",
+]
+
+[[package]]
+name = "tokio-util"
+version = "0.7.8"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "806fe8c2c87eccc8b3267cbae29ed3ab2d0bd37fca70ab622e46aaa9375ddb7d"
+dependencies = [
+ "bytes",
+ "futures-core",
+ "futures-sink",
+ "pin-project-lite",
+ "tokio",
+ "tracing",
+]
+
+[[package]]
+name = "tower-service"
+version = "0.3.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b6bc1c9ce2b5135ac7f93c72918fc37feb872bdc6a5533a8b85eb4b86bfdae52"
+
+[[package]]
+name = "tracing"
+version = "0.1.37"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8ce8c33a8d48bd45d624a6e523445fd21ec13d3653cd51f681abf67418f54eb8"
+dependencies = [
+ "cfg-if",
+ "pin-project-lite",
+ "tracing-core",
+]
+
+[[package]]
+name = "tracing-core"
+version = "0.1.31"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0955b8137a1df6f1a2e9a37d8a6656291ff0297c1a97c24e0d8425fe2312f79a"
+dependencies = [
+ "once_cell",
+]
+
+[[package]]
+name = "try-lock"
+version = "0.2.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3528ecfd12c466c6f163363caf2d02a71161dd5e1cc6ae7b34207ea2d42d81ed"
+
+[[package]]
 name = "typenum"
 version = "1.16.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -1994,11 +2540,10 @@
  "crypto_provider_openssl",
  "crypto_provider_rustcrypto",
  "lazy_static",
+ "lock_adapter",
  "log",
  "rand",
  "rand_chacha",
- "raw-parts",
- "spin 0.9.8",
  "ukey2_connections",
  "ukey2_rs",
 ]
@@ -2028,10 +2573,10 @@
  "crypto_provider_rustcrypto",
  "jni",
  "lazy_static",
+ "lock_adapter",
  "log",
  "rand",
  "rand_chacha",
- "spin 0.9.8",
  "ukey2_connections",
  "ukey2_rs",
 ]
@@ -2072,12 +2617,27 @@
 ]
 
 [[package]]
+name = "unicode-bidi"
+version = "0.3.13"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "92888ba5573ff080736b3648696b70cafad7d250551175acbaa4e0385b3e1460"
+
+[[package]]
 name = "unicode-ident"
 version = "1.0.8"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "e5464a87b239f13a63a501f2701565754bae92d243d4bb7eb12f6d57d2269bf4"
 
 [[package]]
+name = "unicode-normalization"
+version = "0.1.22"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5c5713f0fc4b5db668a2ac63cdb7bb4469d8c9fed047b1d0292cc7b0ce2ba921"
+dependencies = [
+ "tinyvec",
+]
+
+[[package]]
 name = "universal-hash"
 version = "0.5.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -2088,6 +2648,23 @@
 ]
 
 [[package]]
+name = "untrusted"
+version = "0.7.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a156c684c91ea7d62626509bce3cb4e1d9ed5c4d978f7b4352658f96a4c26b4a"
+
+[[package]]
+name = "url"
+version = "2.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "50bff7831e19200a85b17131d085c25d7811bc4e186efdaf54bbd132994a88cb"
+dependencies = [
+ "form_urlencoded",
+ "idna",
+ "percent-encoding",
+]
+
+[[package]]
 name = "utf8parse"
 version = "0.2.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -2116,6 +2693,15 @@
 ]
 
 [[package]]
+name = "want"
+version = "0.3.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "bfa7760aed19e106de2c7c0b581b509f2f25d3dacaf737cb82ac61bc6d760b0e"
+dependencies = [
+ "try-lock",
+]
+
+[[package]]
 name = "wasi"
 version = "0.11.0+wasi-snapshot-preview1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -2147,6 +2733,18 @@
 ]
 
 [[package]]
+name = "wasm-bindgen-futures"
+version = "0.4.35"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "083abe15c5d88556b77bdf7aef403625be9e327ad37c62c4e4129af740168163"
+dependencies = [
+ "cfg-if",
+ "js-sys",
+ "wasm-bindgen",
+ "web-sys",
+]
+
+[[package]]
 name = "wasm-bindgen-macro"
 version = "0.2.85"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -2186,6 +2784,25 @@
 ]
 
 [[package]]
+name = "webpki"
+version = "0.22.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f095d78192e208183081cc07bc5515ef55216397af48b873e5edcd72637fa1bd"
+dependencies = [
+ "ring",
+ "untrusted",
+]
+
+[[package]]
+name = "webpki-roots"
+version = "0.22.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b6c71e40d7d2c34a5106301fb632274ca37242cd0c9d3e64dbece371a40a2d87"
+dependencies = [
+ "webpki",
+]
+
+[[package]]
 name = "which"
 version = "4.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -2228,6 +2845,15 @@
 checksum = "712e227841d057c1ee1cd2fb22fa7e5a5461ae8e48fa2ca79ec42cfc1931183f"
 
 [[package]]
+name = "windows"
+version = "0.48.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e686886bc078bc1b0b600cac0147aadb815089b6e4da64016cbd754b6342700f"
+dependencies = [
+ "windows-targets 0.48.0",
+]
+
+[[package]]
 name = "windows-sys"
 version = "0.45.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -2360,6 +2986,15 @@
 checksum = "1a515f5799fe4961cb532f983ce2b23082366b898e52ffbce459c86f67c8378a"
 
 [[package]]
+name = "winreg"
+version = "0.10.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "80d0f4e272c85def139476380b12f9ac60926689dd2e01d4923222f40580869d"
+dependencies = [
+ "winapi",
+]
+
+[[package]]
 name = "wycheproof"
 version = "0.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
diff --git a/nearby/Cargo.toml b/nearby/Cargo.toml
index 3cd9715..fe44353 100644
--- a/nearby/Cargo.toml
+++ b/nearby/Cargo.toml
@@ -1,5 +1,6 @@
 [workspace]
 members = [
+    "connections/ukey2/lock_adapter",
     "connections/ukey2/ukey2",
     "connections/ukey2/ukey2_connections",
     "connections/ukey2/ukey2_c_ffi",
@@ -16,6 +17,7 @@
     "presence/array_view",
     "presence/ldt",
     "presence/ldt_np_adv",
+    "presence/ldt_np_jni",
     "presence/ldt_tbc",
     "presence/np_hkdf",
     "presence/rand_ext",
@@ -28,14 +30,16 @@
 exclude = ["presence/ldt_np_adv_ffi", "crypto/crypto_provider_boringssl"]
 
 [workspace.dependencies]
+# local crates
 array_ref = { path = "presence/array_ref" }
 array_view = { path = "presence/array_view" }
 crypto_provider = { path = "crypto/crypto_provider" }
+crypto_provider_default = {path = "crypto/crypto_provider_default", default-features=false}
 crypto_provider_openssl = { path = "crypto/crypto_provider_openssl" }
 crypto_provider_rustcrypto = { path = "crypto/crypto_provider_rustcrypto" }
 crypto_provider_stubs = { path = "crypto/crypto_provider_stubs" }
-crypto_provider_default = {path = "crypto/crypto_provider_default" }
 crypto_provider_test = { path = "crypto/crypto_provider_test" }
+lock_adapter = { path = "connections/ukey2/lock_adapter" }
 rand_core_05_adapter = { path = "crypto/rand_core_05_adapter" }
 rand_ext = { path = "presence/rand_ext" }
 test_helper = { path = "presence/test_helper" }
@@ -46,7 +50,7 @@
 ldt_np_adv = { path = "presence/ldt_np_adv" }
 ldt_tbc = { path = "presence/ldt_tbc" }
 
-# RustCrypto crates
+# from crates.io
 rand = { version = "0.8.5", default-features = false }
 rand_core = "0.6.4"
 rand_pcg = "0.3.1"
@@ -87,6 +91,9 @@
 rstest = "0.16.0"
 rstest_reuse = "0.5.0"
 wycheproof = "0.4.0"
+chrono = { version = "0.4.24", default-features = false, features = ["clock"] }
+tempfile = "3.5.0"
+thiserror = "1.0.40"
 
 [workspace.package]
 version = "0.1.0"
@@ -101,3 +108,30 @@
 # Since xts, ldt, etc are in separate crates, use LTO to allow cross-crate inlining.
 # fat vs thin: thin compiles a lot faster, and doesn't seem any slower.
 lto = "thin"
+
+[package]
+name = "build-scripts"
+version.workspace = true
+edition.workspace = true
+publish.workspace = true
+
+[dependencies]
+clap.workspace = true
+anyhow.workspace = true
+shell-escape = "0.1.5"
+owo-colors = "3.5.0"
+reqwest = { version = "0.11.17", default-features = false, features = ["blocking", "rustls-tls"] }
+semver = "1.0.17"
+base64.workspace = true
+walkdir = "2.3.3"
+globset = "0.4.10"
+crossbeam = "0.8.2"
+tinytemplate = "1.2.1"
+chrono.workspace = true
+thiserror.workspace = true
+log.workspace = true
+env_logger.workspace = true
+
+[dev-dependencies]
+tempfile.workspace = true
+
diff --git a/nearby/Dockerfile b/nearby/Dockerfile
index b4fdab0..cd60ac8 100644
--- a/nearby/Dockerfile
+++ b/nearby/Dockerfile
@@ -35,12 +35,12 @@
 # used by boringssl when generating rust bindings
 RUN cargo install bindgen-cli --version 0.64.0
 RUN rustup toolchain add nightly
+# boringssl build wants go
 RUN curl -L https://go.dev/dl/go1.20.2.linux-amd64.tar.gz | tar -C /usr/local -xz
 ENV PATH="$PATH:/usr/local/go/bin"
-RUN go install github.com/google/addlicense@latest
 
 # when the image runs build and test everything to ensure env is setup correctly
-CMD ["./scripts/check-everything.sh"]
+CMD ["cargo", "run", "--", "check-everything"]
 
 # needed for boringssl git operations
 RUN git config --global user.email "docker@example.com"
diff --git a/nearby/README.md b/nearby/README.md
index 1ca0306..85387a0 100644
--- a/nearby/README.md
+++ b/nearby/README.md
@@ -43,7 +43,7 @@
 system dependencies needed to start building and running all of the artifacts in
 the codebase.
 
-Running the image runs check-everything.sh to verify all of the targets can
+Running the image runs `cargo run -- check-everything` to verify all of the targets can
 successfully build and all of the tests pass in your new container environment.
 
 To open a bash shell from the container environment:
@@ -57,54 +57,14 @@
 that way you can make code changes and test them in the same environment without
 having to re-build the image.
 
-### Installing addlicense Tool
-
-This tool helps lint the project for the correct header files being present and
-is run in check_everything.sh
-
-install go:
-
-```sh
-brew install go
-```
-
-Then install the addlicense tool to `$HOME/go/bin`:
-
-```sh
-go install github.com/google/addlicense@latest
-```
-
-Optionally, if you prefer to avoid Go's default `bin` dir that holds build
-output for all go projects, specify the `GOPATH` env var to be the directory to
-install to, e.g. `~/local/addlicense`:
-
-```sh
-GOPATH=~/local/addlicense go install github.com/google/addlicense@latest
-```
-
-This will put the binary at `~/local/addlicense/bin/addlicense` instead
-of `~/go/bin/addlicense`.
-
-Verify that it works:
-
-```sh
-$HOME/go/bin/addlicense -h
-```
-
-Then to auto generate the headers run:
-
-```sh
-$HOME/go/bin/addlicense -c "Google LLC" -l apache .
-```
-
-For more detailed commands see: https://github.com/google/addlicense
-
 ## Common tasks
 
+See `cargo run -- --help` for all the available subcommands.
+
 Check everything:
 
 ```
-./scripts/check-everything.sh
+cargo run -- check-everything
 ```
 
 Build everything:
diff --git a/nearby/connections/ukey2/lock_adapter/Cargo.toml b/nearby/connections/ukey2/lock_adapter/Cargo.toml
new file mode 100644
index 0000000..713f224
--- /dev/null
+++ b/nearby/connections/ukey2/lock_adapter/Cargo.toml
@@ -0,0 +1,13 @@
+[package]
+name = "lock_adapter"
+version.workspace = true
+edition.workspace = true
+publish.workspace = true
+
+[dependencies]
+spin = { workspace = true, optional = true }
+
+[features]
+default = ["spin"]
+spin = ["dep:spin"]
+std = []
diff --git a/nearby/connections/ukey2/lock_adapter/src/lib.rs b/nearby/connections/ukey2/lock_adapter/src/lib.rs
new file mode 100644
index 0000000..098031b
--- /dev/null
+++ b/nearby/connections/ukey2/lock_adapter/src/lib.rs
@@ -0,0 +1,60 @@
+// Copyright 2023 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#![cfg_attr(not(feature = "std"), no_std)]
+
+/// A Spinlock-based implementation of Mutex using the `spin` crate that can be used in `no_std`
+/// environments.
+///
+/// Available with the feature `spin`.
+#[cfg(feature = "spin")]
+pub mod spin;
+
+/// A `std` implementation that yields to the operating system while waiting for the lock.
+///
+/// Available with the feature `std`.
+#[cfg(feature = "std")]
+pub mod std;
+
+/// A trait for mutex implementations that doesn't support poisoning. If the thread panicked while
+/// holding the mutex, the data will be released normally (as spin::Mutex would).
+pub trait NoPoisonMutex<T> {
+    /// An RAII guard for the mutex value that is returned when the lock is successfully obtained.
+    type MutexGuard<'a>
+    where
+        Self: 'a;
+
+    /// Acquires a mutex, blocking the current thread until it is able to do so.
+    ///
+    /// This function will block the local thread until it is available to acquire the mutex. Upon
+    /// returning, the thread is the only thread with the lock held. An RAII guard is returned to
+    /// allow scoped unlock of the lock. When the guard goes out of scope, the mutex will be
+    /// unlocked.
+    ///
+    /// The exact behavior on locking a mutex in the thread which already holds the lock is left
+    /// unspecified. However, this function will not return on the second call (it might panic or
+    /// deadlock, for example).
+    fn lock(&self) -> Self::MutexGuard<'_>;
+
+    /// Attempts to acquire this lock.
+    ///
+    /// If the lock could not be acquired at this time, then `None` is returned. Otherwise, an RAII
+    /// `MutexGuard` is returned. The lock will be unlocked when the guard is dropped.
+    ///
+    /// This function does not block.
+    fn try_lock(&self) -> Option<Self::MutexGuard<'_>>;
+
+    /// Creates a new mutex in an unlocked state ready for use.
+    fn new(value: T) -> Self;
+}
diff --git a/nearby/connections/ukey2/lock_adapter/src/spin.rs b/nearby/connections/ukey2/lock_adapter/src/spin.rs
new file mode 100644
index 0000000..be363d4
--- /dev/null
+++ b/nearby/connections/ukey2/lock_adapter/src/spin.rs
@@ -0,0 +1,33 @@
+// Copyright 2023 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+use crate::NoPoisonMutex;
+
+pub struct Mutex<T>(spin::Mutex<T>);
+
+impl<T> NoPoisonMutex<T> for Mutex<T> {
+    type MutexGuard<'a> = spin::MutexGuard<'a, T> where T: 'a;
+
+    fn lock(&self) -> Self::MutexGuard<'_> {
+        self.0.lock()
+    }
+
+    fn try_lock(&self) -> Option<Self::MutexGuard<'_>> {
+        self.0.try_lock()
+    }
+
+    fn new(value: T) -> Self {
+        Self(spin::Mutex::new(value))
+    }
+}
diff --git a/nearby/connections/ukey2/lock_adapter/src/std.rs b/nearby/connections/ukey2/lock_adapter/src/std.rs
new file mode 100644
index 0000000..ffd3ecc
--- /dev/null
+++ b/nearby/connections/ukey2/lock_adapter/src/std.rs
@@ -0,0 +1,37 @@
+// Copyright 2023 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+use crate::NoPoisonMutex;
+
+pub struct Mutex<T>(std::sync::Mutex<T>);
+
+impl<T> NoPoisonMutex<T> for Mutex<T> {
+    type MutexGuard<'a> = std::sync::MutexGuard<'a, T> where T: 'a;
+
+    fn lock(&self) -> Self::MutexGuard<'_> {
+        self.0.lock().unwrap_or_else(|poison| poison.into_inner())
+    }
+
+    fn try_lock(&self) -> Option<Self::MutexGuard<'_>> {
+        match self.0.try_lock() {
+            Ok(guard) => Some(guard),
+            Err(std::sync::TryLockError::Poisoned(guard)) => Some(guard.into_inner()),
+            Err(std::sync::TryLockError::WouldBlock) => None,
+        }
+    }
+
+    fn new(value: T) -> Self {
+        Self(std::sync::Mutex::new(value))
+    }
+}
diff --git a/nearby/connections/ukey2/ukey2/src/proto_adapter.rs b/nearby/connections/ukey2/ukey2/src/proto_adapter.rs
index adb9982..de3c4b9 100644
--- a/nearby/connections/ukey2/ukey2/src/proto_adapter.rs
+++ b/nearby/connections/ukey2/ukey2/src/proto_adapter.rs
@@ -164,10 +164,7 @@
             .commitment
             .filter(|c| !c.is_empty())
             .ok_or(ukey::ukey2alert::AlertType::BAD_HANDSHAKE_CIPHER)?;
-        Ok(CipherCommitment {
-            commitment,
-            cipher: handshake_cipher,
-        })
+        Ok(CipherCommitment { commitment, cipher: handshake_cipher })
     }
 }
 
@@ -176,9 +173,7 @@
         if self.random().len() != 32 {
             return Err(ukey::ukey2alert::AlertType::BAD_RANDOM);
         }
-        let version: i32 = self
-            .version
-            .ok_or(ukey::ukey2alert::AlertType::BAD_VERSION)?;
+        let version: i32 = self.version.ok_or(ukey::ukey2alert::AlertType::BAD_VERSION)?;
         let next_protocol = self
             .next_protocol
             .filter(|n| !n.is_empty())
@@ -197,9 +192,7 @@
 
 impl IntoAdapter<ServerInit> for ukey::Ukey2ServerInit {
     fn into_adapter(self) -> Result<ServerInit, ukey::ukey2alert::AlertType> {
-        let version: i32 = self
-            .version
-            .ok_or(ukey::ukey2alert::AlertType::BAD_VERSION)?;
+        let version: i32 = self.version.ok_or(ukey::ukey2alert::AlertType::BAD_VERSION)?;
         let random: [u8; 32] = self
             .random
             .and_then(|r| r.try_into().ok())
@@ -209,23 +202,16 @@
             .ok_or(ukey::ukey2alert::AlertType::BAD_HANDSHAKE_CIPHER)
             .and_then(|code| code.value().into_adapter())?;
         // We will be handling bad pubkeys in the layers above
-        let public_key: Vec<u8> = self
-            .public_key
-            .ok_or(ukey::ukey2alert::AlertType::BAD_PUBLIC_KEY)?;
-        Ok(ServerInit {
-            handshake_cipher,
-            version,
-            public_key,
-            random,
-        })
+        let public_key: Vec<u8> =
+            self.public_key.ok_or(ukey::ukey2alert::AlertType::BAD_PUBLIC_KEY)?;
+        Ok(ServerInit { handshake_cipher, version, public_key, random })
     }
 }
 
 impl IntoAdapter<ClientFinished> for ukey::Ukey2ClientFinished {
     fn into_adapter(self) -> Result<ClientFinished, ukey::ukey2alert::AlertType> {
-        let public_key: Vec<u8> = self
-            .public_key
-            .ok_or(ukey::ukey2alert::AlertType::BAD_PUBLIC_KEY)?;
+        let public_key: Vec<u8> =
+            self.public_key.ok_or(ukey::ukey2alert::AlertType::BAD_PUBLIC_KEY)?;
         Ok(ClientFinished { public_key })
     }
 }
diff --git a/nearby/connections/ukey2/ukey2/src/state_machine.rs b/nearby/connections/ukey2/ukey2/src/state_machine.rs
index 6b9a367..c7cefc3 100644
--- a/nearby/connections/ukey2/ukey2/src/state_machine.rs
+++ b/nearby/connections/ukey2/ukey2/src/state_machine.rs
@@ -107,13 +107,12 @@
             )),
             MessageType::ServerInit => {
                 let message = decode_msg_contents::<_, ukey::Ukey2ServerInit>(message_data)?;
-                self.handle_server_init(message, message_bytes.to_vec())
-                    .map_err(|_| {
-                        SendAlert::from(
-                            ukey::ukey2alert::AlertType::BAD_MESSAGE_DATA,
-                            Some("bad message_data".to_string()),
-                        )
-                    })
+                self.handle_server_init(message, message_bytes.to_vec()).map_err(|_| {
+                    SendAlert::from(
+                        ukey::ukey2alert::AlertType::BAD_MESSAGE_DATA,
+                        Some("bad message_data".to_string()),
+                    )
+                })
             }
         }
     }
@@ -132,23 +131,20 @@
             MessageType::ClientInit => {
                 let message: ClientInit =
                     decode_msg_contents::<_, ukey::Ukey2ClientInit>(message_data)?;
-                self.handle_client_init(rng, message, message_bytes.to_vec())
-                    .map_err(|e| {
-                        SendAlert::from(
-                            match e {
-                                ClientInitError::BadVersion => {
-                                    ukey::ukey2alert::AlertType::BAD_VERSION
-                                }
-                                ClientInitError::BadHandshakeCipher => {
-                                    ukey::ukey2alert::AlertType::BAD_HANDSHAKE_CIPHER
-                                }
-                                ClientInitError::BadNextProtocol => {
-                                    ukey::ukey2alert::AlertType::BAD_NEXT_PROTOCOL
-                                }
-                            },
-                            None,
-                        )
-                    })
+                self.handle_client_init(rng, message, message_bytes.to_vec()).map_err(|e| {
+                    SendAlert::from(
+                        match e {
+                            ClientInitError::BadVersion => ukey::ukey2alert::AlertType::BAD_VERSION,
+                            ClientInitError::BadHandshakeCipher => {
+                                ukey::ukey2alert::AlertType::BAD_HANDSHAKE_CIPHER
+                            }
+                            ClientInitError::BadNextProtocol => {
+                                ukey::ukey2alert::AlertType::BAD_NEXT_PROTOCOL
+                            }
+                        },
+                        None,
+                    )
+                })
             }
             MessageType::ClientFinish | MessageType::ServerInit => Err(SendAlert::from(
                 ukey::ukey2alert::AlertType::INCORRECT_MESSAGE,
@@ -170,25 +166,24 @@
         match message_type {
             MessageType::ClientFinish => {
                 let message = decode_msg_contents::<_, ukey::Ukey2ClientFinished>(message_data)?;
-                self.handle_client_finished_msg(message, message_bytes)
-                    .map_err(|e| match e {
-                        ClientFinishedError::BadEd25519Key => SendAlert::from(
-                            ukey::ukey2alert::AlertType::BAD_PUBLIC_KEY,
-                            "Bad ED25519 Key".to_string().into(),
-                        ),
-                        ClientFinishedError::BadP256Key => SendAlert::from(
-                            ukey::ukey2alert::AlertType::BAD_PUBLIC_KEY,
-                            "Bad P256 Key".to_string().into(),
-                        ),
-                        ClientFinishedError::UnknownCommitment => SendAlert::from(
-                            ukey::ukey2alert::AlertType::BAD_MESSAGE_DATA,
-                            "Unknown commitment".to_string().into(),
-                        ),
-                        ClientFinishedError::BadKeyExchange => SendAlert::from(
-                            ukey::ukey2alert::AlertType::INTERNAL_ERROR,
-                            "Key exchange error".to_string().into(),
-                        ),
-                    })
+                self.handle_client_finished_msg(message, message_bytes).map_err(|e| match e {
+                    ClientFinishedError::BadEd25519Key => SendAlert::from(
+                        ukey::ukey2alert::AlertType::BAD_PUBLIC_KEY,
+                        "Bad ED25519 Key".to_string().into(),
+                    ),
+                    ClientFinishedError::BadP256Key => SendAlert::from(
+                        ukey::ukey2alert::AlertType::BAD_PUBLIC_KEY,
+                        "Bad P256 Key".to_string().into(),
+                    ),
+                    ClientFinishedError::UnknownCommitment => SendAlert::from(
+                        ukey::ukey2alert::AlertType::BAD_MESSAGE_DATA,
+                        "Unknown commitment".to_string().into(),
+                    ),
+                    ClientFinishedError::BadKeyExchange => SendAlert::from(
+                        ukey::ukey2alert::AlertType::INTERNAL_ERROR,
+                        "Key exchange error".to_string().into(),
+                    ),
+                })
             }
             MessageType::ClientInit | MessageType::ServerInit => Err(SendAlert::from(
                 ukey::ukey2alert::AlertType::INCORRECT_MESSAGE,
@@ -211,17 +206,11 @@
         .and_then(|message| {
             let message_data = message.message_data();
             if message_data.is_empty() {
-                return Err(SendAlert::from(
-                    ukey::ukey2alert::AlertType::BAD_MESSAGE_DATA,
-                    None,
-                ));
+                return Err(SendAlert::from(ukey::ukey2alert::AlertType::BAD_MESSAGE_DATA, None));
             }
             let message_type = message.message_type();
             if message_type == ukey::ukey2message::Type::UNKNOWN_DO_NOT_USE {
-                return Err(SendAlert::from(
-                    ukey::ukey2alert::AlertType::BAD_MESSAGE_TYPE,
-                    None,
-                ));
+                return Err(SendAlert::from(ukey::ukey2alert::AlertType::BAD_MESSAGE_TYPE, None));
             }
             message_type
                 .into_adapter()
diff --git a/nearby/connections/ukey2/ukey2/src/tests.rs b/nearby/connections/ukey2/ukey2/src/tests.rs
index 5f3b942..b58cee6 100644
--- a/nearby/connections/ukey2/ukey2/src/tests.rs
+++ b/nearby/connections/ukey2/ukey2/src/tests.rs
@@ -61,10 +61,7 @@
     };
 
     let _client = client1
-        .advance_state(
-            &mut rng,
-            &message_data.to_wrapped_msg().write_to_bytes().unwrap(),
-        )
+        .advance_state(&mut rng, &message_data.to_wrapped_msg().write_to_bytes().unwrap())
         .unwrap();
     // TODO assertions on client state
 }
@@ -111,21 +108,15 @@
         };
         client_init.to_wrapped_msg()
     };
-    let server2 = server1
-        .advance_state(&mut rng, &client_init_framed.write_to_bytes().unwrap())
-        .unwrap();
+    let server2 =
+        server1.advance_state(&mut rng, &client_init_framed.write_to_bytes().unwrap()).unwrap();
     assert!(
-        !server2
-            .server_init_msg()
-            .windows(client_random.len())
-            .any(|w| w == client_random),
+        !server2.server_init_msg().windows(client_random.len()).any(|w| w == client_random),
         "Server init msg should not contain the client's random"
     );
     // TODO assertions on server2 state
     // We now move the server to the post-ClientFinished state
-    let _server = server2
-        .advance_state(&mut rng, &client_finished_bytes)
-        .unwrap();
+    let _server = server2.advance_state(&mut rng, &client_finished_bytes).unwrap();
     // TODO assertions on server state
 }
 
@@ -168,13 +159,11 @@
         }
         .to_wrapped_msg()
     };
-    let server2 = server1
-        .advance_state(&mut rng, &client_init_framed.write_to_bytes().unwrap())
-        .unwrap();
+    let server2 =
+        server1.advance_state(&mut rng, &client_init_framed.write_to_bytes().unwrap()).unwrap();
     // TODO assertions on server2 state
-    let _server = server2
-        .advance_state(&mut rng, &client_finished_msg.write_to_bytes().unwrap())
-        .unwrap();
+    let _server =
+        server2.advance_state(&mut rng, &client_finished_msg.write_to_bytes().unwrap()).unwrap();
     // TODO assertions on server state
 }
 
@@ -196,29 +185,20 @@
 fn convert_to_message_type() {
     assert_eq!(
         MessageType::ClientInit,
-        ukey::ukey2message::Type::CLIENT_INIT
-            .into_adapter()
-            .unwrap()
+        ukey::ukey2message::Type::CLIENT_INIT.into_adapter().unwrap()
     );
     assert_eq!(
         MessageType::ServerInit,
-        ukey::ukey2message::Type::SERVER_INIT
-            .into_adapter()
-            .unwrap()
+        ukey::ukey2message::Type::SERVER_INIT.into_adapter().unwrap()
     );
     assert_eq!(
         MessageType::ClientFinish,
-        ukey::ukey2message::Type::CLIENT_FINISH
-            .into_adapter()
-            .unwrap()
+        ukey::ukey2message::Type::CLIENT_FINISH.into_adapter().unwrap()
     );
 }
 
 #[test]
 fn convert_to_cipher_type() {
     assert_eq!(HandshakeCipher::P256Sha512, 100.into_adapter().unwrap());
-    assert_eq!(
-        HandshakeCipher::Curve25519Sha512,
-        200.into_adapter().unwrap()
-    );
+    assert_eq!(HandshakeCipher::Curve25519Sha512, 200.into_adapter().unwrap());
 }
diff --git a/nearby/connections/ukey2/ukey2/src/ukey2_handshake.rs b/nearby/connections/ukey2/ukey2/src/ukey2_handshake.rs
index ec88318..a22c0ed 100644
--- a/nearby/connections/ukey2/ukey2/src/ukey2_handshake.rs
+++ b/nearby/connections/ukey2/ukey2/src/ukey2_handshake.rs
@@ -158,11 +158,7 @@
         next_protocols: hash_set::HashSet<String>,
         handshake_impl: HandshakeImplementation,
     ) -> Self {
-        Self {
-            next_protocols,
-            handshake_impl,
-            _marker: PhantomData,
-        }
+        Self { next_protocols, handshake_impl, _marker: PhantomData }
     }
 
     pub(crate) fn handle_client_init<R: rand::Rng + rand::CryptoRng>(
@@ -305,9 +301,8 @@
             let shared_secret_bytes = match self.key_pair {
                 ServerKeyPair::Curve25519(es) => {
                     let buf = msg.public_key.into_iter().collect::<Vec<u8>>();
-                    let public_key: [u8; 32] = (&buf[..])
-                        .try_into()
-                        .map_err(|_| ClientFinishedError::BadEd25519Key)?;
+                    let public_key: [u8; 32] =
+                        (&buf[..]).try_into().map_err(|_| ClientFinishedError::BadEd25519Key)?;
                     es.diffie_hellman(
                         &<C::X25519 as EcdhProvider<X25519>>::PublicKey::from_bytes(&public_key)
                             .map_err(|_| ClientFinishedError::BadEd25519Key)?,
@@ -419,7 +414,7 @@
                             p256_secret.public_key_bytes(),
                             HandshakeCipher::P256Sha512,
                         )
-                        .unwrap(),
+                        .expect("Output of p256_secret.public_key_bytes should always be valid input for encode_public_key"),
                 ),
                 ..Default::default()
             };
@@ -515,10 +510,8 @@
                 (shared_secret_bytes, self.p256_client_finished_bytes)
             }
             HandshakeCipher::Curve25519Sha512 => {
-                let pub_key: [u8; 32] = server_init
-                    .public_key
-                    .try_into()
-                    .map_err(|_| ServerInitError::BadPublicKey)?;
+                let pub_key: [u8; 32] =
+                    server_init.public_key.try_into().map_err(|_| ServerInitError::BadPublicKey)?;
                 (
                     self.curve25519_secret
                         .diffie_hellman(
@@ -607,12 +600,7 @@
         shared_secret: Vec<u8>,
         next_protocol: String,
     ) -> Self {
-        Self {
-            client_init_bytes,
-            server_init_bytes,
-            shared_secret,
-            next_protocol,
-        }
+        Self { client_init_bytes, server_init_bytes, shared_secret, next_protocol }
     }
 
     /// Returns an HKDF for the UKEY2 `AUTH_STRING`.
@@ -656,16 +644,10 @@
 
     /// Returns `None` if the provided `buf` has size > 255 * 512 bytes.
     pub fn derive_slice(&self, buf: &mut [u8]) -> Option<()> {
-        self.hkdf
-            .expand_multi_info(&[self.client_init_bytes, self.server_init_bytes], buf)
-            .ok()
+        self.hkdf.expand_multi_info(&[self.client_init_bytes, self.server_init_bytes], buf).ok()
     }
 
     fn new(client_init_bytes: &'a [u8], server_init_bytes: &'a [u8], hkdf: C::HkdfSha256) -> Self {
-        Self {
-            client_init_bytes,
-            server_init_bytes,
-            hkdf,
-        }
+        Self { client_init_bytes, server_init_bytes, hkdf }
     }
 }
diff --git a/nearby/connections/ukey2/ukey2/tests/tests.rs b/nearby/connections/ukey2/ukey2/tests/tests.rs
index a2614a8..31ba416 100644
--- a/nearby/connections/ukey2/ukey2/tests/tests.rs
+++ b/nearby/connections/ukey2/ukey2/tests/tests.rs
@@ -30,37 +30,19 @@
         next_protocol,
         HandshakeImplementation::Spec,
     );
-    let server2 = server1
-        .advance_state(&mut rng, client1.client_init_msg())
-        .unwrap();
+    let server2 = server1.advance_state(&mut rng, client1.client_init_msg()).unwrap();
 
-    let client2 = client1
-        .advance_state(&mut rng, server2.server_init_msg())
-        .unwrap();
+    let client2 = client1.advance_state(&mut rng, server2.server_init_msg()).unwrap();
 
-    let server3 = server2
-        .advance_state(&mut rng, client2.client_finished_msg())
-        .unwrap();
+    let server3 = server2.advance_state(&mut rng, client2.client_finished_msg()).unwrap();
 
     assert_eq!(
-        server3
-            .completed_handshake()
-            .auth_string::<RustCrypto>()
-            .derive_array::<32>(),
-        client2
-            .completed_handshake()
-            .auth_string::<RustCrypto>()
-            .derive_array::<32>()
+        server3.completed_handshake().auth_string::<RustCrypto>().derive_array::<32>(),
+        client2.completed_handshake().auth_string::<RustCrypto>().derive_array::<32>()
     );
     assert_eq!(
-        server3
-            .completed_handshake()
-            .next_protocol_secret::<RustCrypto>()
-            .derive_array::<32>(),
-        client2
-            .completed_handshake()
-            .next_protocol_secret::<RustCrypto>()
-            .derive_array::<32>()
+        server3.completed_handshake().next_protocol_secret::<RustCrypto>().derive_array::<32>(),
+        client2.completed_handshake().next_protocol_secret::<RustCrypto>().derive_array::<32>()
     );
 }
 
@@ -79,36 +61,18 @@
         next_protocol,
         HandshakeImplementation::PublicKeyInProtobuf,
     );
-    let server2 = server1
-        .advance_state(&mut rng, client1.client_init_msg())
-        .unwrap();
+    let server2 = server1.advance_state(&mut rng, client1.client_init_msg()).unwrap();
 
-    let client2 = client1
-        .advance_state(&mut rng, server2.server_init_msg())
-        .unwrap();
+    let client2 = client1.advance_state(&mut rng, server2.server_init_msg()).unwrap();
 
-    let server3 = server2
-        .advance_state(&mut rng, client2.client_finished_msg())
-        .unwrap();
+    let server3 = server2.advance_state(&mut rng, client2.client_finished_msg()).unwrap();
 
     assert_eq!(
-        server3
-            .completed_handshake()
-            .auth_string::<RustCrypto>()
-            .derive_array::<32>(),
-        client2
-            .completed_handshake()
-            .auth_string::<RustCrypto>()
-            .derive_array::<32>()
+        server3.completed_handshake().auth_string::<RustCrypto>().derive_array::<32>(),
+        client2.completed_handshake().auth_string::<RustCrypto>().derive_array::<32>()
     );
     assert_eq!(
-        server3
-            .completed_handshake()
-            .next_protocol_secret::<RustCrypto>()
-            .derive_array::<32>(),
-        client2
-            .completed_handshake()
-            .next_protocol_secret::<RustCrypto>()
-            .derive_array::<32>()
+        server3.completed_handshake().next_protocol_secret::<RustCrypto>().derive_array::<32>(),
+        client2.completed_handshake().next_protocol_secret::<RustCrypto>().derive_array::<32>()
     );
 }
diff --git a/nearby/connections/ukey2/ukey2_c_ffi/Cargo.toml b/nearby/connections/ukey2/ukey2_c_ffi/Cargo.toml
index 9a9e43a..3ca55f4 100644
--- a/nearby/connections/ukey2/ukey2_c_ffi/Cargo.toml
+++ b/nearby/connections/ukey2/ukey2_c_ffi/Cargo.toml
@@ -10,18 +10,19 @@
 cfg-if.workspace = true
 crypto_provider_openssl = { workspace = true, optional = true }
 crypto_provider_rustcrypto = { workspace = true, optional = true, features = ["alloc"] }
+lock_adapter.workspace = true
 
 lazy_static.workspace = true
 log.workspace = true
 rand.workspace = true
 rand_chacha.workspace = true
-spin.workspace = true
-raw-parts = "1.1.2"
 
 [features]
 default = ["rustcrypto"]
-openssl = ["dep:crypto_provider_openssl"]
-rustcrypto = ["dep:crypto_provider_rustcrypto"]
+std = ["crypto_provider_rustcrypto/std", "lock_adapter/std"]
+openssl = ["dep:crypto_provider_openssl", "std"]
+rustcrypto = ["crypto_provider_rustcrypto"]
+crypto_provider_rustcrypto = ["dep:crypto_provider_rustcrypto"]
 
 
 [lib]
diff --git a/nearby/connections/ukey2/ukey2_c_ffi/cpp/CMakeLists.txt b/nearby/connections/ukey2/ukey2_c_ffi/cpp/CMakeLists.txt
index 79cdcac..3c6f0db 100644
--- a/nearby/connections/ukey2/ukey2_c_ffi/cpp/CMakeLists.txt
+++ b/nearby/connections/ukey2/ukey2_c_ffi/cpp/CMakeLists.txt
@@ -32,10 +32,9 @@
 # GoogleTest requires at least C++14
 set(CMAKE_CXX_STANDARD 14)
 add_compile_options(-Wall -Werror -Wextra -Wimplicit-fallthrough -Wextra-semi
-        -Wunreachable-code-aggressive -Wthread-safety
         -Wno-missing-field-initializers -Wno-unused-parameter -Wno-psabi
-        -Wloop-analysis -Wno-unneeded-internal-declaration
-        -Wenum-compare-conditional -Wno-ignored-pragma-optimize
+        -Wno-unneeded-internal-declaration
+        -Wno-ignored-pragma-optimize
         -Wno-bitfield-constant-conversion -Wno-deprecated-this-capture -Wshadow
         -Wsign-compare)
 
diff --git a/nearby/connections/ukey2/ukey2_c_ffi/cpp/ukey2_bindings.h b/nearby/connections/ukey2/ukey2_c_ffi/cpp/ukey2_bindings.h
index b14450c..e1f7e1e 100644
--- a/nearby/connections/ukey2/ukey2_c_ffi/cpp/ukey2_bindings.h
+++ b/nearby/connections/ukey2/ukey2_c_ffi/cpp/ukey2_bindings.h
@@ -37,6 +37,10 @@
   size_t len;
 } CFFIByteArray;
 
+typedef struct {
+  bool success;
+  RustFFIByteArray alert_to_send;
+} CMessageParseResult;
 
 typedef enum {
   STATUS_GOOD = 0,
@@ -60,7 +64,7 @@
 // Common handshake methods
 bool is_handshake_complete(Ukey2HandshakeContextHandle handle);
 RustFFIByteArray get_next_handshake_message(Ukey2HandshakeContextHandle handle);
-RustFFIByteArray parse_handshake_message(Ukey2HandshakeContextHandle handle, CFFIByteArray message);
+CMessageParseResult parse_handshake_message(Ukey2HandshakeContextHandle handle, CFFIByteArray message);
 Ukey2ConnectionContextHandle to_connection_context(Ukey2HandshakeContextHandle handle);
 RustFFIByteArray get_verification_string(Ukey2HandshakeContextHandle handle, size_t output_length);
 
diff --git a/nearby/connections/ukey2/ukey2_c_ffi/cpp/ukey2_ffi.h b/nearby/connections/ukey2/ukey2_c_ffi/cpp/ukey2_ffi.h
index 2beae24..b269da8 100644
--- a/nearby/connections/ukey2/ukey2_c_ffi/cpp/ukey2_ffi.h
+++ b/nearby/connections/ukey2/ukey2_c_ffi/cpp/ukey2_ffi.h
@@ -46,7 +46,7 @@
         // -------------------------------------------------------------------------------------------
         //  Protocol version | Encode sequence number | Decode sequence number | Encode key | Decode key
         //    (always 1)
-        static D2DRestoreConnectionContextV1Result FromSavedSession(std::string saved_session);
+        static D2DRestoreConnectionContextV1Result FromSavedSession(std::string data);
 
     private:
         friend class Ukey2Handshake;
@@ -59,6 +59,11 @@
     CD2DRestoreConnectionContextV1Status status;
 };
 
+struct ParseResult {
+    bool success;
+    std::string alert_to_send;
+};
+
 // Base handshake. This should be used to start a secure channel represented by a D2DConnectionContextV1.
 class Ukey2Handshake {
     public:
@@ -71,7 +76,7 @@
         // Returns raw byte data with the message to send over the wire.
         std::string GetNextHandshakeMessage();
         // Parses the raw handshake message received over the wire.
-        void ParseHandshakeMessage(std::string message);
+        ParseResult ParseHandshakeMessage(std::string message);
         // Returns the authentication string of length output_length to be confirmed on both devices.
         std::string GetVerificationString(size_t output_length);
         // Turns this Ukey2Handshake instance into a D2DConnectionContextV1. This method once called,
diff --git a/nearby/connections/ukey2/ukey2_c_ffi/cpp/ukey2_glue.cc b/nearby/connections/ukey2/ukey2_c_ffi/cpp/ukey2_glue.cc
index 6f4a396..6b03f1c 100644
--- a/nearby/connections/ukey2/ukey2_c_ffi/cpp/ukey2_glue.cc
+++ b/nearby/connections/ukey2/ukey2_c_ffi/cpp/ukey2_glue.cc
@@ -17,6 +17,7 @@
 
 #include <cassert>
 #include <cstring>
+#include <iostream>
 #include <string>
 
 CFFIByteArray nullByteArray() {
@@ -46,12 +47,25 @@
     return ret;
 }
 
-void Ukey2Handshake::ParseHandshakeMessage(std::string message) {
+ParseResult Ukey2Handshake::ParseHandshakeMessage(std::string message) {
     CFFIByteArray messageRaw{
         .handle = (uint8_t*)message.c_str(),
         .len = message.length(),
     };
-    parse_handshake_message(handle_, messageRaw);
+    CMessageParseResult result = parse_handshake_message(handle_, messageRaw);
+    std::string alert;
+    if (!result.success) {
+        std::cout << "parse failed" << std::endl;
+        RustFFIByteArray array = result.alert_to_send;
+        if (array.handle != nullptr) {
+            alert = std::string((const char*) array.handle, array.len);
+            rust_dealloc_ffi_byte_array(array);
+        }
+    }
+    return ParseResult {
+        .success = result.success,
+        .alert_to_send = alert,
+    };
 }
 
 std::string Ukey2Handshake::GetVerificationString(size_t output_length) {
diff --git a/nearby/connections/ukey2/ukey2_c_ffi/cpp/ukey2_test.cc b/nearby/connections/ukey2/ukey2_c_ffi/cpp/ukey2_test.cc
index 98ea07e..1e913b5 100644
--- a/nearby/connections/ukey2/ukey2_c_ffi/cpp/ukey2_test.cc
+++ b/nearby/connections/ukey2/ukey2_c_ffi/cpp/ukey2_test.cc
@@ -18,6 +18,19 @@
 #include "ukey2_ffi.h"
 
 namespace {
+
+void RunHandshake(Ukey2Handshake initiator_handle, Ukey2Handshake responder_handle) {
+  ParseResult parse_result = responder_handle.ParseHandshakeMessage(
+      initiator_handle.GetNextHandshakeMessage());
+  ASSERT_TRUE(parse_result.success);
+  parse_result = initiator_handle.ParseHandshakeMessage(
+      responder_handle.GetNextHandshakeMessage());
+  ASSERT_TRUE(parse_result.success);
+  parse_result = responder_handle.ParseHandshakeMessage(
+      initiator_handle.GetNextHandshakeMessage());
+  ASSERT_TRUE(parse_result.success);
+}
+
 TEST(Ukey2RustTest, HandshakeStartsIncomplete) {
   Ukey2Handshake responder_handle = Ukey2Handshake::ForResponder();
   Ukey2Handshake initiator_handle = Ukey2Handshake::ForInitiator();
@@ -28,25 +41,15 @@
 TEST(Ukey2RustTest, HandshakeComplete) {
   Ukey2Handshake responder_handle = Ukey2Handshake::ForResponder();
   Ukey2Handshake initiator_handle = Ukey2Handshake::ForInitiator();
-  responder_handle.ParseHandshakeMessage(
-      initiator_handle.GetNextHandshakeMessage());
-  initiator_handle.ParseHandshakeMessage(
-      responder_handle.GetNextHandshakeMessage());
-  responder_handle.ParseHandshakeMessage(
-      initiator_handle.GetNextHandshakeMessage());
-  ASSERT_TRUE(responder_handle.IsHandshakeComplete());
-  ASSERT_TRUE(initiator_handle.IsHandshakeComplete());
+  RunHandshake(initiator_handle, responder_handle);
+  EXPECT_TRUE(responder_handle.IsHandshakeComplete());
+  EXPECT_TRUE(initiator_handle.IsHandshakeComplete());
 }
 
 TEST(Ukey2RustTest, CanSendReceiveMessage) {
   Ukey2Handshake responder_handle = Ukey2Handshake::ForResponder();
   Ukey2Handshake initiator_handle = Ukey2Handshake::ForInitiator();
-  responder_handle.ParseHandshakeMessage(
-      initiator_handle.GetNextHandshakeMessage());
-  initiator_handle.ParseHandshakeMessage(
-      responder_handle.GetNextHandshakeMessage());
-  responder_handle.ParseHandshakeMessage(
-      initiator_handle.GetNextHandshakeMessage());
+  RunHandshake(initiator_handle, responder_handle);
   ASSERT_TRUE(responder_handle.IsHandshakeComplete());
   ASSERT_TRUE(initiator_handle.IsHandshakeComplete());
   D2DConnectionContextV1 responder_connection =
@@ -64,12 +67,7 @@
 TEST(Ukey2RustTest, TestSaveRestoreSession) {
   Ukey2Handshake responder_handle = Ukey2Handshake::ForResponder();
   Ukey2Handshake initiator_handle = Ukey2Handshake::ForInitiator();
-  responder_handle.ParseHandshakeMessage(
-      initiator_handle.GetNextHandshakeMessage());
-  initiator_handle.ParseHandshakeMessage(
-      responder_handle.GetNextHandshakeMessage());
-  responder_handle.ParseHandshakeMessage(
-      initiator_handle.GetNextHandshakeMessage());
+  RunHandshake(initiator_handle, responder_handle);
   ASSERT_TRUE(responder_handle.IsHandshakeComplete());
   ASSERT_TRUE(initiator_handle.IsHandshakeComplete());
   D2DConnectionContextV1 responder_connection =
diff --git a/nearby/connections/ukey2/ukey2_c_ffi/src/lib.rs b/nearby/connections/ukey2/ukey2_c_ffi/src/lib.rs
index a044471..a79fe60 100644
--- a/nearby/connections/ukey2/ukey2_c_ffi/src/lib.rs
+++ b/nearby/connections/ukey2/ukey2_c_ffi/src/lib.rs
@@ -16,14 +16,18 @@
 use std::ptr::null_mut;
 
 use lazy_static::lazy_static;
+use lock_adapter::NoPoisonMutex;
 use rand::Rng;
 use rand_chacha::rand_core::SeedableRng;
 use rand_chacha::ChaCha20Rng;
-use raw_parts::RawParts;
-use spin::Mutex;
+
+#[cfg(not(feature = "std"))]
+use lock_adapter::spin::Mutex;
+#[cfg(feature = "std")]
+use lock_adapter::std::Mutex;
 
 use ukey2_connections::{
-    D2DConnectionContextV1, D2DHandshakeContext, HandshakeImplementation,
+    D2DConnectionContextV1, D2DHandshakeContext, HandleMessageError, HandshakeImplementation,
     InitiatorD2DHandshakeContext, ServerD2DHandshakeContext,
 };
 
@@ -41,12 +45,32 @@
     cap: usize,
 }
 
+impl RustFFIByteArray {
+    fn from_vec(vec: Vec<u8>) -> RustFFIByteArray {
+        let mut vec = core::mem::ManuallyDrop::new(vec);
+        RustFFIByteArray { ptr: vec.as_mut_ptr(), len: vec.len(), cap: vec.capacity() }
+    }
+
+    unsafe fn into_vec(self) -> Option<Vec<u8>> {
+        if self.ptr.is_null() {
+            return None;
+        }
+        Some(Vec::from_raw_parts(self.ptr, self.len, self.cap))
+    }
+}
+
 #[repr(C)]
 pub struct CFFIByteArray {
     ptr: *mut u8,
     len: usize,
 }
 
+#[repr(C)]
+pub struct CMessageParseResult {
+    success: bool,
+    alert_to_send: RustFFIByteArray,
+}
+
 type D2DBox = Box<dyn D2DHandshakeContext>;
 type ConnectionBox = Box<D2DConnectionContextV1>;
 
@@ -83,49 +107,25 @@
 /// [get_next_handshake_message].
 #[no_mangle]
 pub unsafe extern "C" fn rust_dealloc_ffi_byte_array(arr: RustFFIByteArray) {
-    if !arr.ptr.is_null() {
-        let raw_parts = RawParts {
-            ptr: arr.ptr,
-            length: arr.len,
-            capacity: arr.cap,
-        };
-        let _ = RawParts::into_vec(raw_parts);
+    if let Some(vec) = arr.into_vec() {
+        core::mem::drop(vec);
     }
 }
 
 // Common functions
 #[no_mangle]
 pub extern "C" fn is_handshake_complete(handle: u64) -> bool {
-    HANDLE_MAPPING
-        .lock()
-        .get(&handle)
-        .map_or(false, |ctx| ctx.is_handshake_complete())
+    HANDLE_MAPPING.lock().get(&handle).map_or(false, |ctx| ctx.is_handshake_complete())
 }
 
 #[no_mangle]
 pub extern "C" fn get_next_handshake_message(handle: u64) -> RustFFIByteArray {
     // TODO: error handling
-    let opt_msg = HANDLE_MAPPING
-        .lock()
-        .get(&handle)
-        .and_then(|c| c.get_next_handshake_message());
+    let opt_msg = HANDLE_MAPPING.lock().get(&handle).and_then(|c| c.get_next_handshake_message());
     if let Some(msg) = opt_msg {
-        let RawParts {
-            ptr,
-            length,
-            capacity,
-        } = RawParts::from_vec(msg);
-        RustFFIByteArray {
-            ptr,
-            len: length,
-            cap: capacity,
-        }
+        RustFFIByteArray::from_vec(msg)
     } else {
-        RustFFIByteArray {
-            ptr: null_mut(),
-            len: usize::MAX,
-            cap: usize::MAX,
-        }
+        RustFFIByteArray { ptr: null_mut(), len: usize::MAX, cap: usize::MAX }
     }
 }
 
@@ -135,21 +135,25 @@
 pub unsafe extern "C" fn parse_handshake_message(
     handle: u64,
     arr: CFFIByteArray,
-) -> RustFFIByteArray {
+) -> CMessageParseResult {
     let msg = std::slice::from_raw_parts(arr.ptr, arr.len);
-    // TODO error handling
-    let result = HANDLE_MAPPING
-        .lock()
-        .get_mut(&handle)
-        .unwrap()
-        .handle_handshake_message(msg);
+    let result = HANDLE_MAPPING.lock().get_mut(&handle).unwrap().handle_handshake_message(msg);
     if let Err(error) = result {
-        log::error!("{:?}", error);
+        match error {
+            HandleMessageError::InvalidState | HandleMessageError::BadMessage => {
+                log::error!("{:?}", error);
+            }
+            HandleMessageError::ErrorMessage(message) => {
+                return CMessageParseResult {
+                    success: false,
+                    alert_to_send: RustFFIByteArray::from_vec(message),
+                };
+            }
+        }
     }
-    RustFFIByteArray {
-        ptr: null_mut(),
-        len: usize::MAX,
-        cap: usize::MAX,
+    CMessageParseResult {
+        success: true,
+        alert_to_send: RustFFIByteArray { ptr: null_mut(), len: usize::MAX, cap: usize::MAX },
     }
 }
 
@@ -165,16 +169,7 @@
                 .auth_string::<CryptoProvider>()
                 .derive_vec(length)
                 .unwrap();
-            let RawParts {
-                ptr,
-                length,
-                capacity,
-            } = RawParts::from_vec(auth_vec);
-            RustFFIByteArray {
-                ptr,
-                len: length,
-                cap: capacity,
-            }
+            RustFFIByteArray::from_vec(auth_vec)
         })
         .unwrap()
 }
@@ -227,18 +222,11 @@
     associated_data: CFFIByteArray,
 ) -> RustFFIByteArray {
     if msg.len == 0 {
-        return RustFFIByteArray {
-            ptr: null_mut(),
-            len: usize::MAX,
-            cap: usize::MAX,
-        };
+        return RustFFIByteArray { ptr: null_mut(), len: usize::MAX, cap: usize::MAX };
     }
     let msg = std::slice::from_raw_parts(msg.ptr, msg.len);
     let associated_data = if !associated_data.ptr.is_null() {
-        Some(std::slice::from_raw_parts(
-            associated_data.ptr,
-            associated_data.len,
-        ))
+        Some(std::slice::from_raw_parts(associated_data.ptr, associated_data.len))
     } else {
         None
     };
@@ -247,23 +235,10 @@
         .get_mut(&handle)
         .map(|c| c.encode_message_to_peer::<CryptoProvider, _>(msg, associated_data));
     if let Some(msg) = ret {
-        let RawParts {
-            ptr,
-            length,
-            capacity,
-        } = RawParts::from_vec(msg);
-        RustFFIByteArray {
-            ptr,
-            len: length,
-            cap: capacity,
-        }
+        RustFFIByteArray::from_vec(msg)
     } else {
         log::error!("Was unable to find handle!");
-        RustFFIByteArray {
-            ptr: null_mut(),
-            len: usize::MAX,
-            cap: usize::MAX,
-        }
+        RustFFIByteArray { ptr: null_mut(), len: usize::MAX, cap: usize::MAX }
     }
 }
 
@@ -276,18 +251,11 @@
     associated_data: CFFIByteArray,
 ) -> RustFFIByteArray {
     if msg.len == 0 {
-        return RustFFIByteArray {
-            ptr: null_mut(),
-            len: usize::MAX,
-            cap: usize::MAX,
-        };
+        return RustFFIByteArray { ptr: null_mut(), len: usize::MAX, cap: usize::MAX };
     }
     let msg = std::slice::from_raw_parts(msg.ptr, msg.len);
     let associated_data = if !associated_data.ptr.is_null() {
-        Some(std::slice::from_raw_parts(
-            associated_data.ptr,
-            associated_data.len,
-        ))
+        Some(std::slice::from_raw_parts(associated_data.ptr, associated_data.len))
     } else {
         None
     };
@@ -297,22 +265,9 @@
         .unwrap()
         .decode_message_from_peer::<CryptoProvider, _>(msg, associated_data);
     if let Ok(decoded) = ret {
-        let RawParts {
-            ptr,
-            length,
-            capacity,
-        } = RawParts::from_vec(decoded);
-        RustFFIByteArray {
-            ptr,
-            len: length,
-            cap: capacity,
-        }
+        RustFFIByteArray::from_vec(decoded)
     } else {
-        RustFFIByteArray {
-            ptr: null_mut(),
-            len: usize::MAX,
-            cap: usize::MAX,
-        }
+        RustFFIByteArray { ptr: null_mut(), len: usize::MAX, cap: usize::MAX }
     }
 }
 
@@ -323,53 +278,23 @@
         .get(&handle)
         .unwrap()
         .get_session_unique::<CryptoProvider>();
-    let RawParts {
-        ptr,
-        length,
-        capacity,
-    } = RawParts::from_vec(session_unique_bytes);
-    RustFFIByteArray {
-        ptr,
-        len: length,
-        cap: capacity,
-    }
+    RustFFIByteArray::from_vec(session_unique_bytes)
 }
 
 #[no_mangle]
 pub extern "C" fn get_sequence_number_for_encoding(handle: u64) -> i32 {
-    CONNECTION_HANDLE_MAPPING
-        .lock()
-        .get(&handle)
-        .unwrap()
-        .get_sequence_number_for_encoding()
+    CONNECTION_HANDLE_MAPPING.lock().get(&handle).unwrap().get_sequence_number_for_encoding()
 }
 
 #[no_mangle]
 pub extern "C" fn get_sequence_number_for_decoding(handle: u64) -> i32 {
-    CONNECTION_HANDLE_MAPPING
-        .lock()
-        .get(&handle)
-        .unwrap()
-        .get_sequence_number_for_decoding()
+    CONNECTION_HANDLE_MAPPING.lock().get(&handle).unwrap().get_sequence_number_for_decoding()
 }
 
 #[no_mangle]
 pub extern "C" fn save_session(handle: u64) -> RustFFIByteArray {
-    let key = CONNECTION_HANDLE_MAPPING
-        .lock()
-        .get(&handle)
-        .unwrap()
-        .save_session();
-    let RawParts {
-        ptr,
-        length,
-        capacity,
-    } = RawParts::from_vec(key);
-    RustFFIByteArray {
-        ptr,
-        len: length,
-        cap: capacity,
-    }
+    let key = CONNECTION_HANDLE_MAPPING.lock().get(&handle).unwrap().save_session();
+    RustFFIByteArray::from_vec(key)
 }
 
 #[repr(i32)]
@@ -400,13 +325,7 @@
             status: Status::Good,
         }
     } else {
-        log::error!(
-            "failed to restore session with error {:?}",
-            ctx.unwrap_err()
-        );
-        CD2DRestoreConnectionContextV1Result {
-            handle: u64::MAX,
-            status: Status::Error,
-        }
+        log::error!("failed to restore session with error {:?}", ctx.unwrap_err());
+        CD2DRestoreConnectionContextV1Result { handle: u64::MAX, status: Status::Error }
     }
 }
diff --git a/nearby/connections/ukey2/ukey2_connections/benches/ukey2_benches.rs b/nearby/connections/ukey2/ukey2_connections/benches/ukey2_benches.rs
index 63372ef..b609761 100644
--- a/nearby/connections/ukey2/ukey2_connections/benches/ukey2_benches.rs
+++ b/nearby/connections/ukey2/ukey2_connections/benches/ukey2_benches.rs
@@ -40,34 +40,22 @@
     );
     server_ctx
         .handle_handshake_message(
-            initiator_ctx
-                .get_next_handshake_message()
-                .expect("No message")
-                .as_slice(),
+            initiator_ctx.get_next_handshake_message().expect("No message").as_slice(),
         )
         .expect("Failed to handle message");
     initiator_ctx
         .handle_handshake_message(
-            server_ctx
-                .get_next_handshake_message()
-                .expect("No message")
-                .as_slice(),
+            server_ctx.get_next_handshake_message().expect("No message").as_slice(),
         )
         .expect("Failed to handle message");
     server_ctx
         .handle_handshake_message(
-            initiator_ctx
-                .get_next_handshake_message()
-                .expect("No message")
-                .as_slice(),
+            initiator_ctx.get_next_handshake_message().expect("No message").as_slice(),
         )
         .expect("Failed to handle message");
     assert!(initiator_ctx.is_handshake_complete());
     assert!(server_ctx.is_handshake_complete());
-    (
-        initiator_ctx.to_connection_context().unwrap(),
-        server_ctx.to_connection_context().unwrap(),
-    )
+    (initiator_ctx.to_connection_context().unwrap(), server_ctx.to_connection_context().unwrap())
 }
 
 fn criterion_benchmark(c: &mut Criterion) {
diff --git a/nearby/connections/ukey2/ukey2_connections/src/d2d_connection_context_v1.rs b/nearby/connections/ukey2/ukey2_connections/src/d2d_connection_context_v1.rs
index 1f524c9..70a1556 100644
--- a/nearby/connections/ukey2/ukey2_connections/src/d2d_connection_context_v1.rs
+++ b/nearby/connections/ukey2/ukey2_connections/src/d2d_connection_context_v1.rs
@@ -90,14 +90,8 @@
 ) -> Result<RustDeviceToDeviceMessage, DecodeError> {
     let result =
         DeviceToDeviceMessage::parse_from_bytes(message).map_err(|_| DecodeError::BadData)?;
-    let (msg, seq_num) = result
-        .message
-        .zip(result.sequence_number)
-        .ok_or(DecodeError::BadData)?;
-    Ok(RustDeviceToDeviceMessage {
-        sequence_num: seq_num,
-        message: msg,
-    })
+    let (msg, seq_num) = result.message.zip(result.sequence_number).ok_or(DecodeError::BadData)?;
+    Ok(RustDeviceToDeviceMessage { sequence_num: seq_num, message: msg })
 }
 
 fn derive_aes256_key<C: CryptoProvider>(initial_key: &[u8], purpose: &[u8]) -> Aes256Key {
@@ -196,10 +190,8 @@
         handshake: &CompletedHandshake,
         rng: R,
     ) -> Self {
-        let next_protocol_secret = handshake
-            .next_protocol_secret::<C>()
-            .derive_array::<AES_256_KEY_SIZE>()
-            .unwrap();
+        let next_protocol_secret =
+            handshake.next_protocol_secret::<C>().derive_array::<AES_256_KEY_SIZE>().unwrap();
         D2DConnectionContextV1::new::<C>(
             0,
             0,
@@ -213,10 +205,8 @@
         handshake: &CompletedHandshake,
         rng: R,
     ) -> Self {
-        let next_protocol_secret = handshake
-            .next_protocol_secret::<C>()
-            .derive_array::<AES_256_KEY_SIZE>()
-            .unwrap();
+        let next_protocol_secret =
+            handshake.next_protocol_secret::<C>().derive_array::<AES_256_KEY_SIZE>().unwrap();
         D2DConnectionContextV1::new::<C>(
             0,
             0,
@@ -281,13 +271,7 @@
             // This should always succeed since all of the parsers above are valid over the entire
             // [u8] space, and we already checked the length at the start.
             .expect("Saved session parsing should succeed");
-        Ok(Self::new::<C>(
-            encode_sequence_num,
-            decode_sequence_num,
-            encode_key,
-            decode_key,
-            rng,
-        ))
+        Ok(Self::new::<C>(encode_sequence_num, decode_sequence_num, encode_key, decode_key, rng))
     }
 
     /// Once initiator and responder have exchanged public keys, use this method to encrypt and
@@ -378,10 +362,8 @@
         hmac.verify(payload_mac).map_err(|_| DecodeError::BadData)?;
         let payload =
             HeaderAndBody::parse_from_bytes(&payload).map_err(|_| DecodeError::BadData)?;
-        let associated_data_len = payload
-            .header
-            .as_ref()
-            .and_then(|header| header.associated_data_length);
+        let associated_data_len =
+            payload.header.as_ref().and_then(|header| header.associated_data_length);
         if associated_data_len != associated_data.map(|ad| ad.as_ref().len() as u32) {
             return Err(DecodeError::BadData);
         }
diff --git a/nearby/connections/ukey2/ukey2_connections/src/d2d_handshake_context.rs b/nearby/connections/ukey2/ukey2_connections/src/d2d_handshake_context.rs
index 0499dad..d9e1524 100644
--- a/nearby/connections/ukey2/ukey2_connections/src/d2d_handshake_context.rs
+++ b/nearby/connections/ukey2/ukey2_connections/src/d2d_handshake_context.rs
@@ -116,10 +116,7 @@
             D2DConnectionContextV1::<StdRng>::NEXT_PROTOCOL_IDENTIFIER.to_owned(),
             handshake_impl,
         );
-        Self {
-            state: InitiatorState::Stage1(client),
-            rng,
-        }
+        Self { state: InitiatorState::Stage1(client), rng }
     }
 }
 
@@ -173,13 +170,12 @@
         // Since self.rng is expected to be a seeded PRNG, not an OsRng directly, from_rng
         // should never fail. https://rust-random.github.io/book/guide-err.html
         let rng = R::from_rng(&mut self.rng).unwrap();
-        self.to_completed_handshake()
-            .and_then(|h| match h.next_protocol.as_ref() {
-                D2DConnectionContextV1::<R>::NEXT_PROTOCOL_IDENTIFIER => Ok(
-                    D2DConnectionContextV1::from_initiator_handshake::<C>(h, rng),
-                ),
-                _ => Err(HandshakeError::HandshakeNotComplete),
-            })
+        self.to_completed_handshake().and_then(|h| match h.next_protocol.as_ref() {
+            D2DConnectionContextV1::<R>::NEXT_PROTOCOL_IDENTIFIER => {
+                Ok(D2DConnectionContextV1::from_initiator_handshake::<C>(h, rng))
+            }
+            _ => Err(HandshakeError::HandshakeNotComplete),
+        })
     }
 }
 
@@ -284,17 +280,16 @@
         // Since self.rng is expected to be a seeded PRNG, not an OsRng directly, from_rng
         // should never fail. https://rust-random.github.io/book/guide-err.html
         let rng = R::from_rng(&mut self.rng).unwrap();
-        self.to_completed_handshake()
-            .map(|h| match h.next_protocol.as_ref() {
-                D2DConnectionContextV1::<R>::NEXT_PROTOCOL_IDENTIFIER => {
-                    D2DConnectionContextV1::from_responder_handshake::<C>(h, rng)
-                }
-                _ => {
-                    // This should never happen because ukey2_handshake should set next_protocol to
-                    // one of the values we passed in Ukey2ServerStage1::from, which doesn't contain
-                    // any other value.
-                    panic!("Unknown next protocol: {}", h.next_protocol);
-                }
-            })
+        self.to_completed_handshake().map(|h| match h.next_protocol.as_ref() {
+            D2DConnectionContextV1::<R>::NEXT_PROTOCOL_IDENTIFIER => {
+                D2DConnectionContextV1::from_responder_handshake::<C>(h, rng)
+            }
+            _ => {
+                // This should never happen because ukey2_handshake should set next_protocol to
+                // one of the values we passed in Ukey2ServerStage1::from, which doesn't contain
+                // any other value.
+                panic!("Unknown next protocol: {}", h.next_protocol);
+            }
+        })
     }
 }
diff --git a/nearby/connections/ukey2/ukey2_connections/src/java_utils.rs b/nearby/connections/ukey2/ukey2_connections/src/java_utils.rs
index 9b4dac8..42bd7cc 100644
--- a/nearby/connections/ukey2/ukey2_connections/src/java_utils.rs
+++ b/nearby/connections/ukey2/ukey2_connections/src/java_utils.rs
@@ -15,7 +15,5 @@
 /// Implementation compatible with Java's
 /// [`Object.hashCode()`](https://docs.oracle.com/javase/7/docs/api/java/lang/Object.html#hashCode()).
 pub(crate) fn hash_code(input: &[u8]) -> i32 {
-    input.iter().fold(1_i32, |acc, &byte| {
-        31_i32.wrapping_mul(acc).wrapping_add(byte as i8 as i32)
-    })
+    input.iter().fold(1_i32, |acc, &byte| 31_i32.wrapping_mul(acc).wrapping_add(byte as i8 as i32))
 }
diff --git a/nearby/connections/ukey2/ukey2_connections/src/tests.rs b/nearby/connections/ukey2/ukey2_connections/src/tests.rs
index 9b5403f..35a1e70 100644
--- a/nearby/connections/ukey2/ukey2_connections/src/tests.rs
+++ b/nearby/connections/ukey2/ukey2_connections/src/tests.rs
@@ -64,9 +64,7 @@
     #[values(RustCrypto::new(), Openssl)] _crypto_provider: C,
 ) {
     let iv = [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1];
-    let ciphertext = [
-        20, 59, 195, 101, 11, 208, 245, 128, 247, 196, 81, 80, 158, 77, 174, 61,
-    ];
+    let ciphertext = [20, 59, 195, 101, 11, 208, 245, 128, 247, 196, 81, 80, 158, 77, 174, 61];
     let key = b"42424242424242424242424242424242";
     let plaintext = decrypt::<C::AesCbcPkcs7Padded>(key, &ciphertext, &iv).unwrap();
     assert_eq!(plaintext, b"Hello World!");
@@ -85,7 +83,12 @@
     );
     let bad_key = b"43434343434343434343434343434343";
     let decrypt_result = decrypt::<C::AesCbcPkcs7Padded>(bad_key, ciphertext.as_slice(), &iv);
-    assert!(decrypt_result.is_err());
+    match decrypt_result {
+        // The padding is valid, but the decrypted value should be bad since the keys don't match
+        Ok(decrypted_bad) => assert_ne!(decrypted_bad, message),
+        // The padding is bad, so it returns an error and is unable to decrypt
+        Err(crypto_provider::aes::cbc::DecryptionError::BadPadding) => (),
+    }
     let decrypt_result = decrypt::<C::AesCbcPkcs7Padded>(good_key, ciphertext.as_slice(), &iv);
     let ptext = decrypt_result.unwrap();
     assert_eq!(ptext, message.to_vec());
@@ -112,34 +115,22 @@
     );
     server_ctx
         .handle_handshake_message(
-            initiator_ctx
-                .get_next_handshake_message()
-                .expect("No message")
-                .as_slice(),
+            initiator_ctx.get_next_handshake_message().expect("No message").as_slice(),
         )
         .expect("Failed to handle message");
     initiator_ctx
         .handle_handshake_message(
-            server_ctx
-                .get_next_handshake_message()
-                .expect("No message")
-                .as_slice(),
+            server_ctx.get_next_handshake_message().expect("No message").as_slice(),
         )
         .expect("Failed to handle message");
     server_ctx
         .handle_handshake_message(
-            initiator_ctx
-                .get_next_handshake_message()
-                .expect("No message")
-                .as_slice(),
+            initiator_ctx.get_next_handshake_message().expect("No message").as_slice(),
         )
         .expect("Failed to handle message");
     assert!(initiator_ctx.is_handshake_complete());
     assert!(server_ctx.is_handshake_complete());
-    (
-        initiator_ctx.to_connection_context().unwrap(),
-        server_ctx.to_connection_context().unwrap(),
-    )
+    (initiator_ctx.to_connection_context().unwrap(), server_ctx.to_connection_context().unwrap())
 }
 
 #[rstest]
@@ -164,9 +155,7 @@
             45, 239, 234, 248, 148, 9, 150, 204, 117, 32, 216, 5, 126, 224, 39
         ]
     );
-    let decoded = server_conn_ctx
-        .decode_message_from_peer::<C, &[u8]>(&encoded, None)
-        .unwrap();
+    let decoded = server_conn_ctx.decode_message_from_peer::<C, &[u8]>(&encoded, None).unwrap();
     assert_eq!(message, &decoded[..]);
 }
 
@@ -178,10 +167,7 @@
     let (mut init_conn_ctx, mut server_conn_ctx) = run_handshake::<C>();
     let encoded = init_conn_ctx.encode_message_to_peer::<C, &[u8]>(message, None);
     let decoded = server_conn_ctx.decode_message_from_peer::<C, &[u8]>(encoded.as_slice(), None);
-    assert_eq!(
-        message.to_vec(),
-        decoded.expect("Decode should be successful")
-    );
+    assert_eq!(message.to_vec(), decoded.expect("Decode should be successful"));
 }
 
 #[rstest]
@@ -193,10 +179,7 @@
     let encoded = init_conn_ctx.encode_message_to_peer::<C, _>(message, Some(b"associated data"));
     let decoded = server_conn_ctx
         .decode_message_from_peer::<C, _>(encoded.as_slice(), Some(b"associated data"));
-    assert_eq!(
-        message.to_vec(),
-        decoded.expect("Decode should be successful")
-    );
+    assert_eq!(message.to_vec(), decoded.expect("Decode should be successful"));
     // Make sure decode fails with missing associated data.
     let decoded = server_conn_ctx.decode_message_from_peer::<C, &[u8]>(encoded.as_slice(), None);
     assert!(decoded.is_err());
@@ -223,10 +206,7 @@
     let encoded = init_restored_ctx.encode_message_to_peer::<C, &[u8]>(message, None);
     let decoded =
         server_restored_ctx.decode_message_from_peer::<C, &[u8]>(encoded.as_slice(), None);
-    assert_eq!(
-        message.to_vec(),
-        decoded.expect("Decode should be successful")
-    );
+    assert_eq!(message.to_vec(), decoded.expect("Decode should be successful"));
 }
 
 #[rstest]
@@ -240,10 +220,7 @@
         .expect("failed to restore client session");
     let server_restored_ctx =
         D2DConnectionContextV1::from_saved_session::<C>(&server_session[0..60]);
-    assert_eq!(
-        server_restored_ctx.unwrap_err(),
-        DeserializeError::BadDataLength
-    );
+    assert_eq!(server_restored_ctx.unwrap_err(), DeserializeError::BadDataLength);
 }
 
 #[rstest]
@@ -257,10 +234,7 @@
         .expect("failed to restore client session");
     server_session[0] = 0; // Change the protocol version to an invalid one (0)
     let server_restored_ctx = D2DConnectionContextV1::from_saved_session::<C>(&server_session);
-    assert_eq!(
-        server_restored_ctx.unwrap_err(),
-        DeserializeError::BadProtocolVersion
-    );
+    assert_eq!(server_restored_ctx.unwrap_err(), DeserializeError::BadProtocolVersion);
 }
 
 #[rstest]
@@ -273,10 +247,7 @@
     let message = b"Hello World!";
     let encoded = init_conn_ctx.encode_message_to_peer::<C, &[u8]>(message, None);
     let decoded = server_conn_ctx.decode_message_from_peer::<C, &[u8]>(encoded.as_slice(), None);
-    assert_eq!(
-        message.to_vec(),
-        decoded.expect("Decode should be successful")
-    );
+    assert_eq!(message.to_vec(), decoded.expect("Decode should be successful"));
     let init_session_after = init_conn_ctx.get_session_unique::<C>();
     let server_session_after = server_conn_ctx.get_session_unique::<C>();
     let bad_server_ctx = D2DConnectionContextV1::new::<C>(
@@ -296,10 +267,7 @@
 fn test_java_hashcode() {
     assert_eq!(java_utils::hash_code("4".as_bytes()), 83i32);
     assert_eq!(java_utils::hash_code(&[0x65, 0x47]), 4163i32);
-    assert_eq!(
-        java_utils::hash_code(&[0x12, 0x23, 0x34, 0x45, 0x56, 0x67, 0x78]),
-        1590192324i32
-    );
+    assert_eq!(java_utils::hash_code(&[0x12, 0x23, 0x34, 0x45, 0x56, 0x67, 0x78]), 1590192324i32);
     assert_eq!(
         java_utils::hash_code(&[0x12, 0x23, 0x34, 0x45, 0x56, 0x67, 0x78, 0xFF]),
         2051321787
diff --git a/nearby/connections/ukey2/ukey2_jni/Cargo.toml b/nearby/connections/ukey2/ukey2_jni/Cargo.toml
index 2a4b9f7..7a399d3 100644
--- a/nearby/connections/ukey2/ukey2_jni/Cargo.toml
+++ b/nearby/connections/ukey2/ukey2_jni/Cargo.toml
@@ -9,6 +9,7 @@
 [dependencies]
 ukey2_connections = { path = "../ukey2_connections" }
 ukey2_rs = { path = "../ukey2" }
+lock_adapter.workspace = true
 
 cfg-if.workspace = true
 crypto_provider_openssl = { workspace = true, optional = true }
@@ -16,14 +17,15 @@
 lazy_static.workspace = true
 rand.workspace = true
 rand_chacha.workspace = true
-spin.workspace = true
 jni.workspace = true
 log = { workspace = true, features = ["std"] }
 
 [features]
 default = ["rustcrypto"]
-openssl = ["dep:crypto_provider_openssl"]
-rustcrypto = ["dep:crypto_provider_rustcrypto"]
+openssl = ["dep:crypto_provider_openssl", "std"]
+rustcrypto = ["crypto_provider_rustcrypto"]
+std = ["lock_adapter/std", "crypto_provider_rustcrypto/std"]
+crypto_provider_rustcrypto = ["dep:crypto_provider_rustcrypto"]
 
 [lib]
 crate_type = ["cdylib"]
\ No newline at end of file
diff --git a/nearby/connections/ukey2/ukey2_jni/java/build.gradle.kts b/nearby/connections/ukey2/ukey2_jni/java/build.gradle.kts
index 56d4c04..58c58fc 100644
--- a/nearby/connections/ukey2/ukey2_jni/java/build.gradle.kts
+++ b/nearby/connections/ukey2/ukey2_jni/java/build.gradle.kts
@@ -27,6 +27,7 @@
     // Apply the java-library plugin for API and implementation separation.
     `java-library`
     kotlin("jvm") version "1.8.0"
+    id("me.champeau.jmh") version "0.7.1"
 }
 
 repositories {
@@ -49,6 +50,10 @@
     jvmToolchain(17)
 }
 
+tasks.jmh {
+    jvmArgs.value(mutableListOf("-Djava.library.path=../../../../target/release"))
+}
+
 tasks.test {
     useJUnitPlatform()
     jvmArgs = mutableListOf("-Djava.library.path=../../../../target/debug")
diff --git a/nearby/connections/ukey2/ukey2_jni/java/src/jmh/java/com/google/security/cryptauth/lib/securegcm/Ukey2Benchmark.java b/nearby/connections/ukey2/ukey2_jni/java/src/jmh/java/com/google/security/cryptauth/lib/securegcm/Ukey2Benchmark.java
new file mode 100644
index 0000000..eb063cc
--- /dev/null
+++ b/nearby/connections/ukey2/ukey2_jni/java/src/jmh/java/com/google/security/cryptauth/lib/securegcm/Ukey2Benchmark.java
@@ -0,0 +1,83 @@
+/*
+ * Copyright 2023 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.google.security.cryptauth.lib.securegcm;
+
+import org.openjdk.jmh.annotations.*;
+import org.openjdk.jmh.infra.Blackhole;
+import org.openjdk.jmh.profile.GCProfiler;
+import org.openjdk.jmh.runner.Runner;
+import org.openjdk.jmh.runner.RunnerException;
+import org.openjdk.jmh.runner.options.Options;
+import org.openjdk.jmh.runner.options.OptionsBuilder;
+
+import java.nio.charset.StandardCharsets;
+import java.time.Duration;
+import java.util.concurrent.TimeUnit;
+import java.util.Random;
+
+/**
+ * Benchmark for encoding and decoding UKEY2 messages over the JNI, analogous to
+ * `ukey2_benches.rs`. The parameters and the operations also roughly matches the that of the Rust
+ * Criterion benchmark. That said, since the benchmark infrastructure is different, there will
+ * inevitably be differences the skews the number in certain ways – comparison of numbers from the
+ * different benchmarks should compared on order-of-magnitudes only. To get the JNI overhead, for
+ * example, it would be better use this JMH infra to measure a call into a no-op Rust function,
+ * which is a more apples-to-apples comparison.
+ *
+ * To run this benchmark, run
+ *   cargo build -p ukey2_jni --release && ./gradlew jmh
+ */
+@State(Scope.Benchmark)
+@OutputTimeUnit(TimeUnit.SECONDS)
+@BenchmarkMode(Mode.Throughput)
+public class Ukey2Benchmark {
+
+    @State(Scope.Thread)
+    public static class ConnectionState {
+        D2DConnectionContextV1 connContext;
+        D2DConnectionContextV1 serverConnContext;
+        @Param({"10", "1024"})
+        int sizeKibs;
+        byte[] inputBytes;
+
+        @Setup
+        public void setup() throws Exception {
+            D2DHandshakeContext initiatorContext =
+                new D2DHandshakeContext(D2DHandshakeContext.Role.Initiator);
+            D2DHandshakeContext serverContext =
+                new D2DHandshakeContext(D2DHandshakeContext.Role.Responder);
+            serverContext.parseHandshakeMessage(initiatorContext.getNextHandshakeMessage());
+            initiatorContext.parseHandshakeMessage(serverContext.getNextHandshakeMessage());
+            serverContext.parseHandshakeMessage(initiatorContext.getNextHandshakeMessage());
+            connContext = initiatorContext.toConnectionContext();
+            serverConnContext = serverContext.toConnectionContext();
+            Random random = new Random();
+            inputBytes = new byte[sizeKibs * 1024];
+            random.nextBytes(inputBytes);
+        }
+    }
+
+    @Benchmark
+    @Fork(3)
+    @Warmup(iterations = 2, time = 500, timeUnit = TimeUnit.MILLISECONDS)
+    @Measurement(iterations = 5, time = 500, timeUnit = TimeUnit.MILLISECONDS)
+    public void encodeAndDecode(ConnectionState state, Blackhole blackhole) throws Exception {
+        byte[] encoded = state.connContext.encodeMessageToPeer(state.inputBytes, null);
+        byte[] decoded = state.serverConnContext.decodeMessageFromPeer(encoded, null);
+        blackhole.consume(decoded);
+    }
+}
diff --git a/nearby/connections/ukey2/ukey2_jni/java/src/main/java/com/google/security/cryptauth/lib/securegcm/D2DConnectionContextV1.java b/nearby/connections/ukey2/ukey2_jni/java/src/main/java/com/google/security/cryptauth/lib/securegcm/D2DConnectionContextV1.java
index bb5c1f8..7874cd9 100644
--- a/nearby/connections/ukey2/ukey2_jni/java/src/main/java/com/google/security/cryptauth/lib/securegcm/D2DConnectionContextV1.java
+++ b/nearby/connections/ukey2/ukey2_jni/java/src/main/java/com/google/security/cryptauth/lib/securegcm/D2DConnectionContextV1.java
@@ -37,7 +37,7 @@
 
     private static native byte[] save_session(long contextPtr) throws BadHandleException;
 
-    private static native long from_saved_session(byte[] saved_session_info);
+    private static native long from_saved_session(byte[] savedSessionInfo);
 
     private final long contextPtr;
 
@@ -56,7 +56,8 @@
      * @param payload The message to be encrypted.
      * @return The encrypted/encoded message.
      */
-    public @Nonnull byte[] encodeMessageToPeer(@Nonnull byte[] payload, @Nullable byte[] associatedData) throws BadHandleException {
+     @Nonnull
+    public byte[] encodeMessageToPeer(@Nonnull byte[] payload, @Nullable byte[] associatedData) throws BadHandleException {
         return encode_message_to_peer(contextPtr, payload, associatedData);
     }
 
@@ -66,7 +67,8 @@
      * @param message The message received over the connection.
      * @return The decoded message from the connection peer.
      */
-    public @Nonnull byte[] decodeMessageFromPeer(@Nonnull byte[] message, @Nullable byte[] associatedData) throws CryptoException {
+     @Nonnull
+    public byte[] decodeMessageFromPeer(@Nonnull byte[] message, @Nullable byte[] associatedData) throws CryptoException {
         return decode_message_from_peer(contextPtr, message, associatedData);
     }
 
@@ -75,7 +77,8 @@
      *
      * @return The session unique identifier
      */
-    public @Nonnull byte[] getSessionUnique() throws BadHandleException {
+     @Nonnull
+    public  byte[] getSessionUnique() throws BadHandleException {
         return get_session_unique(contextPtr);
     }
 
@@ -102,7 +105,8 @@
      *
      * @return a byte array representing the current session.
      */
-    public @Nonnull byte[] saveSession() throws BadHandleException {
+     @Nonnull
+    public byte[] saveSession() throws BadHandleException {
         return save_session(contextPtr);
     }
 
@@ -111,9 +115,8 @@
      *
      * @param savedSessionInfo the byte array from saveSession()
      * @return a D2DConnectionContextV1 session with the same properties as the context saved.
-     * @throws SessionRestoreException if the session was unable to be restored.
      */
-    public static D2DConnectionContextV1 fromSavedSession(@Nonnull byte[] savedSessionInfo) throws SessionRestoreException {
+    public static D2DConnectionContextV1 fromSavedSession(@Nonnull byte[] savedSessionInfo) {
         return new D2DConnectionContextV1(from_saved_session(savedSessionInfo));
     }
 
diff --git a/nearby/connections/ukey2/ukey2_jni/java/src/main/java/com/google/security/cryptauth/lib/securegcm/D2DHandshakeContext.java b/nearby/connections/ukey2/ukey2_jni/java/src/main/java/com/google/security/cryptauth/lib/securegcm/D2DHandshakeContext.java
index 94827b0..39f7aa9 100644
--- a/nearby/connections/ukey2/ukey2_jni/java/src/main/java/com/google/security/cryptauth/lib/securegcm/D2DHandshakeContext.java
+++ b/nearby/connections/ukey2/ukey2_jni/java/src/main/java/com/google/security/cryptauth/lib/securegcm/D2DHandshakeContext.java
@@ -24,26 +24,26 @@
     }
 
     public enum Role {
-        Initiator,
-        Responder,
+        INITIATOR,
+        RESPONDER,
     }
 
-    private final long context_ptr;
+    private final long contextPtr;
 
-    private static native boolean is_handshake_complete(long context_ptr) throws BadHandleException;
+    private static native boolean is_handshake_complete(long contextPtr) throws BadHandleException;
 
-    private static native long create_context(boolean is_client);
+    private static native long create_context(boolean isClient);
 
-    private static native byte[] get_next_handshake_message(long context_ptr) throws BadHandleException;
+    private static native byte[] get_next_handshake_message(long contextPtr) throws BadHandleException;
 
-    private static native void parse_handshake_message(long context_ptr, byte[] message) throws BadHandleException, HandshakeException;
+    private static native void parse_handshake_message(long contextPtr, byte[] message) throws BadHandleException, HandshakeException;
 
-    private static native byte[] get_verification_string(long context_ptr, int length) throws BadHandleException, HandshakeException;
+    private static native byte[] get_verification_string(long contextPtr, int length) throws BadHandleException, HandshakeException;
 
-    private static native long to_connection_context(long context_ptr) throws HandshakeException;
+    private static native long to_connection_context(long contextPtr) throws HandshakeException;
 
     public D2DHandshakeContext(@Nonnull Role role) {
-        this.context_ptr = create_context(role == Role.Initiator);
+        this.contextPtr = create_context(role == Role.INITIATOR);
     }
 
     /**
@@ -52,7 +52,7 @@
      * @return a D2DHandshakeContext for the role of initiator in the handshake.
      */
     public static D2DHandshakeContext forInitiator() {
-        return new D2DHandshakeContext(Role.Initiator);
+        return new D2DHandshakeContext(Role.INITIATOR);
     }
 
     /**
@@ -61,7 +61,7 @@
      * @return a D2DHandshakeContext for the role of responder/server in the handshake.
      */
     public static D2DHandshakeContext forResponder() {
-        return new D2DHandshakeContext(Role.Responder);
+        return new D2DHandshakeContext(Role.RESPONDER);
     }
 
     /**
@@ -70,7 +70,7 @@
      * @return true/false depending on if the handshake is complete.
      */
     public boolean isHandshakeComplete() throws BadHandleException {
-        return is_handshake_complete(context_ptr);
+        return is_handshake_complete(contextPtr);
     }
 
     /**
@@ -78,8 +78,9 @@
      *
      * @return handshake message encoded in a SecureMessage.
      */
-    public @Nonnull byte[] getNextHandshakeMessage() throws BadHandleException {
-        return get_next_handshake_message(context_ptr);
+    @Nonnull
+    public byte[] getNextHandshakeMessage() throws BadHandleException {
+        return get_next_handshake_message(contextPtr);
     }
 
     /**
@@ -87,8 +88,9 @@
      *
      * @param message - handshake message from the other side.
      */
-    public @Nonnull void parseHandshakeMessage(@Nonnull byte[] message) throws BadHandleException, HandshakeException {
-        parse_handshake_message(context_ptr, message);
+    @Nonnull
+    public void parseHandshakeMessage(@Nonnull byte[] message) throws BadHandleException, HandshakeException {
+        parse_handshake_message(contextPtr, message);
     }
 
     /**
@@ -102,8 +104,9 @@
      * @throws BadHandleException - Thrown if the handle is no longer valid, for example after calling {@link D2DHandshakeContext#toConnectionContext}
      * @throws HandshakeException - Thrown if the handshake is not complete when this function is called.
      */
-    public @Nonnull byte[] getVerificationString(int length) throws BadHandleException, HandshakeException {
-        return get_verification_string(context_ptr, length);
+    @Nonnull
+    public byte[] getVerificationString(int length) throws BadHandleException, HandshakeException {
+        return get_verification_string(contextPtr, length);
     }
 
     /**
@@ -114,6 +117,6 @@
      * @throws HandshakeException if the handsshake is not complete when this function is called.
      */
     public D2DConnectionContextV1 toConnectionContext() throws HandshakeException {
-        return new D2DConnectionContextV1(to_connection_context(context_ptr));
+        return new D2DConnectionContextV1(to_connection_context(contextPtr));
     }
 }
diff --git a/nearby/connections/ukey2/ukey2_jni/java/src/test/java/com/google/security/cryptauth/lib/securegcm/TestUkey2Protocol.kt b/nearby/connections/ukey2/ukey2_jni/java/src/test/java/com/google/security/cryptauth/lib/securegcm/TestUkey2Protocol.kt
index 1090c7e..79cbd15 100644
--- a/nearby/connections/ukey2/ukey2_jni/java/src/test/java/com/google/security/cryptauth/lib/securegcm/TestUkey2Protocol.kt
+++ b/nearby/connections/ukey2/ukey2_jni/java/src/test/java/com/google/security/cryptauth/lib/securegcm/TestUkey2Protocol.kt
@@ -36,10 +36,10 @@
     @Test
     fun testHandshake() {
         val initiatorContext =
-            D2DHandshakeContext(D2DHandshakeContext.Role.Initiator, NoOpLogger)
+            D2DHandshakeContext(D2DHandshakeContext.Role.INITIATOR)
         assertFalse(initiatorContext.isHandshakeComplete)
         val serverContext =
-            D2DHandshakeContext(D2DHandshakeContext.Role.Responder, NoOpLogger)
+            D2DHandshakeContext(D2DHandshakeContext.Role.RESPONDER)
         assertFalse(serverContext.isHandshakeComplete)
         assertDoesNotThrow {
             serverContext.parseHandshakeMessage(initiatorContext.nextHandshakeMessage)
@@ -53,9 +53,9 @@
     @Test
     fun testSendReceiveMessage() {
         val initiatorContext =
-            D2DHandshakeContext(D2DHandshakeContext.Role.Initiator, NoOpLogger)
+            D2DHandshakeContext(D2DHandshakeContext.Role.INITIATOR)
         val serverContext =
-            D2DHandshakeContext(D2DHandshakeContext.Role.Responder, NoOpLogger)
+            D2DHandshakeContext(D2DHandshakeContext.Role.RESPONDER)
         assertDoesNotThrow {
             serverContext.parseHandshakeMessage(initiatorContext.nextHandshakeMessage)
             initiatorContext.parseHandshakeMessage(serverContext.nextHandshakeMessage)
@@ -77,9 +77,9 @@
     @Test
     fun testSaveRestoreSession() {
         val initiatorContext =
-            D2DHandshakeContext(D2DHandshakeContext.Role.Initiator, NoOpLogger)
+            D2DHandshakeContext(D2DHandshakeContext.Role.INITIATOR)
         val serverContext =
-            D2DHandshakeContext(D2DHandshakeContext.Role.Responder, NoOpLogger)
+            D2DHandshakeContext(D2DHandshakeContext.Role.RESPONDER)
         assertDoesNotThrow {
             serverContext.parseHandshakeMessage(initiatorContext.nextHandshakeMessage)
             initiatorContext.parseHandshakeMessage(serverContext.nextHandshakeMessage)
@@ -103,9 +103,9 @@
     @Test
     fun testSaveRestoreBadSession() {
         val initiatorContext =
-            D2DHandshakeContext(D2DHandshakeContext.Role.Initiator, NoOpLogger)
+            D2DHandshakeContext(D2DHandshakeContext.Role.INITIATOR)
         val serverContext =
-            D2DHandshakeContext(D2DHandshakeContext.Role.Responder, NoOpLogger)
+            D2DHandshakeContext(D2DHandshakeContext.Role.RESPONDER)
         val deriveInitiatorSavedSession = {
             assertDoesNotThrow {
                 serverContext.parseHandshakeMessage(initiatorContext.nextHandshakeMessage)
@@ -124,9 +124,9 @@
     @Test
     fun tryReuseHandshakeContext() {
         val initiatorContext =
-            D2DHandshakeContext(D2DHandshakeContext.Role.Initiator, NoOpLogger)
+            D2DHandshakeContext(D2DHandshakeContext.Role.INITIATOR)
         val serverContext =
-            D2DHandshakeContext(D2DHandshakeContext.Role.Responder, NoOpLogger)
+            D2DHandshakeContext(D2DHandshakeContext.Role.RESPONDER)
         assertDoesNotThrow {
             serverContext.parseHandshakeMessage(initiatorContext.nextHandshakeMessage)
             initiatorContext.parseHandshakeMessage(serverContext.nextHandshakeMessage)
@@ -142,9 +142,9 @@
     @Test
     fun testSendReceiveMessageWithAssociatedData() {
         val initiatorContext =
-            D2DHandshakeContext(D2DHandshakeContext.Role.Initiator, NoOpLogger)
+            D2DHandshakeContext(D2DHandshakeContext.Role.INITIATOR)
         val serverContext =
-            D2DHandshakeContext(D2DHandshakeContext.Role.Responder, NoOpLogger)
+            D2DHandshakeContext(D2DHandshakeContext.Role.RESPONDER)
         val associatedData = "Associated data.".toByteArray()
         assertDoesNotThrow {
             serverContext.parseHandshakeMessage(initiatorContext.nextHandshakeMessage)
@@ -167,9 +167,9 @@
     @Test
     fun testVerificationString() {
         val initiatorContext =
-            D2DHandshakeContext(D2DHandshakeContext.Role.Initiator, NoOpLogger)
+            D2DHandshakeContext(D2DHandshakeContext.Role.INITIATOR)
         val serverContext =
-            D2DHandshakeContext(D2DHandshakeContext.Role.Responder, NoOpLogger)
+            D2DHandshakeContext(D2DHandshakeContext.Role.RESPONDER)
         assertDoesNotThrow {
             serverContext.parseHandshakeMessage(initiatorContext.nextHandshakeMessage)
             initiatorContext.parseHandshakeMessage(serverContext.nextHandshakeMessage)
diff --git a/nearby/connections/ukey2/ukey2_jni/src/lib.rs b/nearby/connections/ukey2/ukey2_jni/src/lib.rs
index e5106d7..570e74b 100644
--- a/nearby/connections/ukey2/ukey2_jni/src/lib.rs
+++ b/nearby/connections/ukey2/ukey2_jni/src/lib.rs
@@ -18,10 +18,15 @@
 use jni::sys::{jboolean, jbyteArray, jint, jlong, JNI_TRUE};
 use jni::JNIEnv;
 use lazy_static::lazy_static;
+use lock_adapter::NoPoisonMutex;
 use rand::Rng;
 use rand_chacha::rand_core::SeedableRng;
 use rand_chacha::ChaCha20Rng;
-use spin::Mutex;
+
+#[cfg(not(feature = "std"))]
+use lock_adapter::spin::Mutex;
+#[cfg(feature = "std")]
+use lock_adapter::std::Mutex;
 
 use ukey2_connections::{
     D2DConnectionContextV1, D2DHandshakeContext, DecodeError, DeserializeError, HandleMessageError,
@@ -83,11 +88,8 @@
     if let Some(ctx) = HANDLE_MAPPING.lock().get(&(context_handle as u64)) {
         is_complete = ctx.is_handshake_complete();
     } else {
-        env.throw_new(
-            "com/google/security/cryptauth/lib/securegcm/BadHandleException",
-            "",
-        )
-        .expect("failed to find error class");
+        env.throw_new("com/google/security/cryptauth/lib/securegcm/BadHandleException", "")
+            .expect("failed to find error class");
     }
     is_complete as jboolean
 }
@@ -121,11 +123,8 @@
     let next_message = if let Some(ctx) = HANDLE_MAPPING.lock().get(&(context_handle as u64)) {
         ctx.get_next_handshake_message()
     } else {
-        env.throw_new(
-            "com/google/security/cryptauth/lib/securegcm/BadHandleException",
-            "",
-        )
-        .expect("failed to find error class");
+        env.throw_new("com/google/security/cryptauth/lib/securegcm/BadHandleException", "")
+            .expect("failed to find error class");
         None
     };
     // TODO error handling
@@ -146,18 +145,12 @@
     context_handle: jlong,
     message: jbyteArray,
 ) {
-    let rust_buffer = env
-        .convert_byte_array(unsafe { JByteArray::from_raw(message) })
-        .unwrap();
+    let rust_buffer = env.convert_byte_array(unsafe { JByteArray::from_raw(message) }).unwrap();
     let result = if let Some(ctx) = HANDLE_MAPPING.lock().get_mut(&(context_handle as u64)) {
-        ctx.handle_handshake_message(rust_buffer.as_slice())
-            .map_err(JniError::HandleMessageError)
+        ctx.handle_handshake_message(rust_buffer.as_slice()).map_err(JniError::HandleMessageError)
     } else {
-        env.throw_new(
-            "com/google/security/cryptauth/lib/securegcm/BadHandleException",
-            "",
-        )
-        .expect("failed to find error class");
+        env.throw_new("com/google/security/cryptauth/lib/securegcm/BadHandleException", "")
+            .expect("failed to find error class");
         Err(JniError::BadHandle)
     };
     if let Err(e) = result {
@@ -187,17 +180,10 @@
     let result = if let Some(ctx) = HANDLE_MAPPING.lock().get_mut(&(context_handle as u64)) {
         ctx.to_completed_handshake()
             .map_err(|_| JniError::HandshakeError(HandshakeError::HandshakeNotComplete))
-            .map(|h| {
-                h.auth_string::<CryptoProvider>()
-                    .derive_vec(length as usize)
-                    .unwrap()
-            })
+            .map(|h| h.auth_string::<CryptoProvider>().derive_vec(length as usize).unwrap())
     } else {
-        env.throw_new(
-            "com/google/security/cryptauth/lib/securegcm/BadHandleException",
-            "",
-        )
-        .expect("failed to find error class");
+        env.throw_new("com/google/security/cryptauth/lib/securegcm/BadHandleException", "")
+            .expect("failed to find error class");
         Err(JniError::BadHandle)
     };
     if let Err(e) = result {
@@ -228,8 +214,7 @@
     context_handle: jlong,
 ) -> jlong {
     let conn_context = if let Some(ctx) = HANDLE_MAPPING.lock().get_mut(&(context_handle as u64)) {
-        ctx.to_connection_context()
-            .map_err(JniError::HandshakeError)
+        ctx.to_connection_context().map_err(JniError::HandshakeError)
     } else {
         Err(JniError::BadHandle)
     };
@@ -265,14 +250,11 @@
     // We create the empty array here so we don't run into issues requesting a new byte array from
     // the JNI env while an exception is being thrown.
     let empty_array = env.new_byte_array(0).unwrap();
-    let result = if let Some(ctx) = CONNECTION_HANDLE_MAPPING
-        .lock()
-        .get_mut(&(context_handle as u64))
+    let result = if let Some(ctx) =
+        CONNECTION_HANDLE_MAPPING.lock().get_mut(&(context_handle as u64))
     {
         Ok(ctx.encode_message_to_peer::<CryptoProvider, _>(
-            env.convert_byte_array(unsafe { JByteArray::from_raw(payload) })
-                .unwrap()
-                .as_slice(),
+            env.convert_byte_array(unsafe { JByteArray::from_raw(payload) }).unwrap().as_slice(),
             if associated_data.is_null() {
                 None
             } else {
@@ -286,14 +268,10 @@
         Err(JniError::BadHandle)
     };
     if let Ok(ret_vec) = result {
-        env.byte_array_from_slice(ret_vec.as_slice())
-            .expect("unable to create jByteArray")
+        env.byte_array_from_slice(ret_vec.as_slice()).expect("unable to create jByteArray")
     } else {
-        env.throw_new(
-            "com/google/security/cryptauth/lib/securegcm/BadHandleException",
-            "",
-        )
-        .expect("failed to find error class");
+        env.throw_new("com/google/security/cryptauth/lib/securegcm/BadHandleException", "")
+            .expect("failed to find error class");
         empty_array
     }
     .into_raw()
@@ -311,14 +289,11 @@
     associated_data: jbyteArray,
 ) -> jbyteArray {
     let empty_array = env.new_byte_array(0).unwrap();
-    let result = if let Some(ctx) = CONNECTION_HANDLE_MAPPING
-        .lock()
-        .get_mut(&(context_handle as u64))
+    let result = if let Some(ctx) =
+        CONNECTION_HANDLE_MAPPING.lock().get_mut(&(context_handle as u64))
     {
         ctx.decode_message_from_peer::<CryptoProvider, _>(
-            env.convert_byte_array(unsafe { JByteArray::from_raw(message) })
-                .unwrap()
-                .as_slice(),
+            env.convert_byte_array(unsafe { JByteArray::from_raw(message) }).unwrap().as_slice(),
             if associated_data.is_null() {
                 None
             } else {
@@ -333,8 +308,7 @@
         Err(JniError::BadHandle)
     };
     if let Ok(message) = result {
-        env.byte_array_from_slice(message.as_slice())
-            .expect("unable to create jByteArray")
+        env.byte_array_from_slice(message.as_slice()).expect("unable to create jByteArray")
     } else {
         env.throw_new(
             "com/google/security/cryptauth/lib/securegcm/CryptoException",
@@ -360,17 +334,11 @@
     _: JClass,
     context_handle: jlong,
 ) -> jint {
-    if let Some(ctx) = CONNECTION_HANDLE_MAPPING
-        .lock()
-        .get(&(context_handle as u64))
-    {
+    if let Some(ctx) = CONNECTION_HANDLE_MAPPING.lock().get(&(context_handle as u64)) {
         ctx.get_sequence_number_for_encoding() as jint
     } else {
-        env.throw_new(
-            "com/google/security/cryptauth/lib/securegcm/BadHandleException",
-            "",
-        )
-        .expect("failed to find error class");
+        env.throw_new("com/google/security/cryptauth/lib/securegcm/BadHandleException", "")
+            .expect("failed to find error class");
         -1 as jint
     }
 }
@@ -381,17 +349,11 @@
     _: JClass,
     context_handle: jlong,
 ) -> jint {
-    if let Some(ctx) = CONNECTION_HANDLE_MAPPING
-        .lock()
-        .get(&(context_handle as u64))
-    {
+    if let Some(ctx) = CONNECTION_HANDLE_MAPPING.lock().get(&(context_handle as u64)) {
         ctx.get_sequence_number_for_decoding() as jint
     } else {
-        env.throw_new(
-            "com/google/security/cryptauth/lib/securegcm/BadHandleException",
-            "",
-        )
-        .expect("failed to find error class");
+        env.throw_new("com/google/security/cryptauth/lib/securegcm/BadHandleException", "")
+            .expect("failed to find error class");
         -1 as jint
     }
 }
@@ -403,18 +365,11 @@
     context_handle: jlong,
 ) -> jbyteArray {
     let empty_array = env.new_byte_array(0).unwrap();
-    if let Some(ctx) = CONNECTION_HANDLE_MAPPING
-        .lock()
-        .get(&(context_handle as u64))
-    {
-        env.byte_array_from_slice(ctx.save_session().as_slice())
-            .expect("unable to save session")
+    if let Some(ctx) = CONNECTION_HANDLE_MAPPING.lock().get(&(context_handle as u64)) {
+        env.byte_array_from_slice(ctx.save_session().as_slice()).expect("unable to save session")
     } else {
-        env.throw_new(
-            "com/google/security/cryptauth/lib/securegcm/BadHandleException",
-            "",
-        )
-        .expect("failed to find error class");
+        env.throw_new("com/google/security/cryptauth/lib/securegcm/BadHandleException", "")
+            .expect("failed to find error class");
         empty_array
     }
     .into_raw()
@@ -457,18 +412,12 @@
     context_handle: jlong,
 ) -> jbyteArray {
     let empty_array = env.new_byte_array(0).unwrap();
-    if let Some(ctx) = CONNECTION_HANDLE_MAPPING
-        .lock()
-        .get(&(context_handle as u64))
-    {
+    if let Some(ctx) = CONNECTION_HANDLE_MAPPING.lock().get(&(context_handle as u64)) {
         env.byte_array_from_slice(ctx.get_session_unique::<CryptoProvider>().as_slice())
             .expect("unable to get unique session id")
     } else {
-        env.throw_new(
-            "com/google/security/cryptauth/lib/securegcm/BadHandleException",
-            "",
-        )
-        .expect("failed to find error class");
+        env.throw_new("com/google/security/cryptauth/lib/securegcm/BadHandleException", "")
+            .expect("failed to find error class");
         empty_array
     }
     .into_raw()
diff --git a/nearby/connections/ukey2/ukey2_shell/src/main.rs b/nearby/connections/ukey2/ukey2_shell/src/main.rs
index 5a9ce82..e4bcc0d 100644
--- a/nearby/connections/ukey2/ukey2_shell/src/main.rs
+++ b/nearby/connections/ukey2/ukey2_shell/src/main.rs
@@ -58,9 +58,7 @@
     let length: u32 = message.len() as u32;
     let length_bytes = length.to_be_bytes();
     std::io::stdout().write_all(&length_bytes).unwrap();
-    std::io::stdout()
-        .write_all(message.as_slice())
-        .expect("failed to write message");
+    std::io::stdout().write_all(message.as_slice()).expect("failed to write message");
     let _ = std::io::stdout().flush();
 }
 
@@ -92,9 +90,7 @@
     assert_eq!(LENGTH, std::io::stdin().read(&mut length_buf).unwrap());
     let length_usize = u32::from_be_bytes(length_buf);
     let mut buffer = vec![0u8; length_usize as usize];
-    std::io::stdin()
-        .read_exact(buffer.as_mut_slice())
-        .expect("failed to read frame");
+    std::io::stdin().read_exact(buffer.as_mut_slice()).expect("failed to read frame");
     buffer
 }
 
@@ -104,20 +100,13 @@
 
 impl Ukey2Shell {
     fn new(verification_string_length: i32) -> Self {
-        Self {
-            verification_string_length: verification_string_length as usize,
-        }
+        Self { verification_string_length: verification_string_length as usize }
     }
 
     fn run_secure_connection_loop(connection_ctx: &mut D2DConnectionContextV1) -> bool {
         loop {
             let input = read_frame();
-            let idx = input
-                .iter()
-                .enumerate()
-                .find(|(_index, &byte)| byte == 0x20)
-                .unwrap()
-                .0;
+            let idx = input.iter().enumerate().find(|(_index, &byte)| byte == 0x20).unwrap().0;
             let (cmd, payload) = (&input[0..idx], &input[idx + 1..]);
             if cmd == b"encrypt" {
                 let result =
@@ -150,19 +139,12 @@
         initiator_ctx
             .handle_handshake_message(server_init_msg.as_slice())
             .expect("Failed to handle message");
-        write_frame(
-            initiator_ctx
-                .get_next_handshake_message()
-                .unwrap_or_default(),
-        );
+        write_frame(initiator_ctx.get_next_handshake_message().unwrap_or_default());
         // confirm auth str
         let auth_str = initiator_ctx
             .to_completed_handshake()
             .ok()
-            .and_then(|h| {
-                h.auth_string::<RustCrypto>()
-                    .derive_vec(self.verification_string_length)
-            })
+            .and_then(|h| h.auth_string::<RustCrypto>().derive_vec(self.verification_string_length))
             .unwrap_or_else(|| vec![0; self.verification_string_length]);
         write_frame(auth_str);
         let ack = read_frame();
@@ -180,9 +162,7 @@
             HandshakeImplementation::PublicKeyInProtobuf,
         );
         let initiator_init_msg = read_frame();
-        server_ctx
-            .handle_handshake_message(initiator_init_msg.as_slice())
-            .unwrap();
+        server_ctx.handle_handshake_message(initiator_init_msg.as_slice()).unwrap();
         let server_next_msg = server_ctx.get_next_handshake_message().unwrap();
         write_frame(server_next_msg);
         let initiator_finish_msg = read_frame();
@@ -193,10 +173,7 @@
         let auth_str = server_ctx
             .to_completed_handshake()
             .ok()
-            .and_then(|h| {
-                h.auth_string::<RustCrypto>()
-                    .derive_vec(self.verification_string_length)
-            })
+            .and_then(|h| h.auth_string::<RustCrypto>().derive_vec(self.verification_string_length))
             .unwrap_or_else(|| vec![0; self.verification_string_length]);
         write_frame(auth_str);
         let ack = read_frame();
diff --git a/nearby/crypto/README.md b/nearby/crypto/README.md
index 067f1da..4cb65be 100644
--- a/nearby/crypto/README.md
+++ b/nearby/crypto/README.md
@@ -37,9 +37,10 @@
 `crypto_provider_openssl` can also be made to use BoringSSL via the `boringssl` feature. This
 translates to using the `openssl` and `openssl-sys` crates' `unstable_boringssl` feature. Since the
 depenedency `bssl-sys` is not on crates.io, to test the BoringSSL integration, you'll need to run
-`scripts/prepare-boringssl.sh`, which clones BoringSSL and the Android version of `rust-openssl`.
+`cargo run -- build-boringssl`, which clones BoringSSL. Then, to use the Android version of
+`rust-openssl`, run `cargo run -- prepare-rust-openssl`.
 
-* Run `scripts/prepare-boringssl.sh` to setup the workspace
+* Run `cargo run -- build-boringssl` to setup the workspace
 * Run `cargo --config=.cargo/config-boringssl.toml test --features=boringssl` to test the crypto
   provider implementations.
 * Run `cargo --config=.cargo/config-boringssl.toml run -p <package> --features=openssl,boringssl
diff --git a/nearby/crypto/bssl-crypto/src/lib.rs b/nearby/crypto/bssl-crypto/src/lib.rs
index d72e106..89e6968 100644
--- a/nearby/crypto/bssl-crypto/src/lib.rs
+++ b/nearby/crypto/bssl-crypto/src/lib.rs
@@ -12,5 +12,5 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-//! Placeholder crate to satisfy cargo. If actually using boring ssl, please run `prepare_boringssl`
-//! from scripts/build_script.sh
+//! Placeholder crate to satisfy cargo. If actually using boring ssl, please run the
+//! `build-boringssl` subcommand of the top level crate.
diff --git a/nearby/crypto/crypto_provider/Cargo.toml b/nearby/crypto/crypto_provider/Cargo.toml
index 53eb974..60f8626 100644
--- a/nearby/crypto/crypto_provider/Cargo.toml
+++ b/nearby/crypto/crypto_provider/Cargo.toml
@@ -13,10 +13,10 @@
 rand.workspace = true
 
 [features]
-default = ["alloc", "gcm_siv"]
+default = ["alloc"]
 std = []
 alloc = []
-gcm_siv = []
+test_vectors = []
 
 [[bench]]
 name = "hmac_bench"
diff --git a/nearby/crypto/crypto_provider/benches/hkdf_bench.rs b/nearby/crypto/crypto_provider/benches/hkdf_bench.rs
index 8c6af00..4c11d0d 100644
--- a/nearby/crypto/crypto_provider/benches/hkdf_bench.rs
+++ b/nearby/crypto/crypto_provider/benches/hkdf_bench.rs
@@ -26,35 +26,23 @@
     let salt = hex!("000102030405060708090a0b0c");
     let info = hex!("f0f1f2f3f4f5f6f7f8f9");
 
-    c.bench_function(
-        &format!("bench hkdf with salt {}", std::any::type_name::<C>()),
-        |b| {
-            b.iter(|| {
-                let hk = C::HkdfSha256::new(Some(&salt[..]), &ikm);
-                let mut okm = [0u8; 42];
-                hk.expand(&info, &mut okm)
-                    .expect("42 is a valid length for Sha256 to output");
-            });
-        },
-    );
+    c.bench_function(&format!("bench hkdf with salt {}", std::any::type_name::<C>()), |b| {
+        b.iter(|| {
+            let hk = C::HkdfSha256::new(Some(&salt[..]), &ikm);
+            let mut okm = [0u8; 42];
+            hk.expand(&info, &mut okm).expect("42 is a valid length for Sha256 to output");
+        });
+    });
 
-    c.bench_function(
-        &format!("bench hkdf no salt {}", std::any::type_name::<C>()),
-        |b| {
-            b.iter(|| {
-                let hk = C::HkdfSha256::new(None, &ikm);
-                let mut okm = [0u8; 42];
-                hk.expand(&info, &mut okm)
-                    .expect("42 is a valid length for Sha256 to output");
-            });
-        },
-    );
+    c.bench_function(&format!("bench hkdf no salt {}", std::any::type_name::<C>()), |b| {
+        b.iter(|| {
+            let hk = C::HkdfSha256::new(None, &ikm);
+            let mut okm = [0u8; 42];
+            hk.expand(&info, &mut okm).expect("42 is a valid length for Sha256 to output");
+        });
+    });
 }
 
-criterion_group!(
-    benches,
-    hkdf_sha256_operations::<RustCrypto>,
-    hkdf_sha256_operations::<Openssl>,
-);
+criterion_group!(benches, hkdf_sha256_operations::<RustCrypto>, hkdf_sha256_operations::<Openssl>,);
 
 criterion_main!(benches);
diff --git a/nearby/crypto/crypto_provider/src/aead/aes_gcm_siv.rs b/nearby/crypto/crypto_provider/src/aead/aes_gcm_siv.rs
new file mode 100644
index 0000000..3be7db3
--- /dev/null
+++ b/nearby/crypto/crypto_provider/src/aead/aes_gcm_siv.rs
@@ -0,0 +1,23 @@
+// Copyright 2023 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+//! Traits for AES-GCM-SIV.
+
+extern crate alloc;
+use crate::aead::Aead;
+
+/// An implementation of AES-GCM-SIV.
+///
+/// An AesGcmSiv impl may be used for encryption and decryption.
+pub trait AesGcmSiv: Aead<Nonce = [u8; 12]> {}
diff --git a/nearby/crypto/crypto_provider/src/aead/mod.rs b/nearby/crypto/crypto_provider/src/aead/mod.rs
new file mode 100644
index 0000000..27284a9
--- /dev/null
+++ b/nearby/crypto/crypto_provider/src/aead/mod.rs
@@ -0,0 +1,50 @@
+// Copyright 2023 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+extern crate alloc;
+use alloc::vec::Vec;
+
+/// Contains traits for the AES-GCM-SIV AEAD algorithm.
+pub mod aes_gcm_siv;
+
+/// Error returned on unsuccessful AEAD operation.
+pub struct AeadError;
+
+/// Authenticated Encryption with Associated Data (AEAD) algorithm, where `N` is the size of the
+/// Nonce. Encrypts and decrypts buffers in-place.
+pub trait Aead {
+    /// The size of the authentication tag, this is appended to the message on the encrypt operation
+    /// and truncated from the plaintext after decrypting.
+    const TAG_SIZE: usize;
+
+    /// The cryptographic nonce used by the AEAD. The nonce must be unique for all messages with
+    /// the same key. This is critically important - nonce reuse may completely undermine the
+    /// security of the AEAD. Nonces may be predictable and public, so long as they are unique.
+    type Nonce;
+
+    /// The key material used to initialize the AEAD.
+    type Key;
+
+    /// Instantiates a new instance of the AEAD from key material.
+    fn new(key: &Self::Key) -> Self;
+
+    /// Encrypt the given buffer containing a plaintext message in-place. On success increases the
+    /// buffer by `Self::TAG_SIZE` bytes and appends the auth tag to the end of `msg`.
+    fn encrypt(&self, msg: &mut Vec<u8>, aad: &[u8], nonce: &Self::Nonce) -> Result<(), AeadError>;
+
+    /// Decrypt the message in-place, returning an error in the event the provided authentication
+    /// tag does not match the given ciphertext. The buffer will be truncated to the length of the
+    /// original plaintext message upon success.
+    fn decrypt(&self, msg: &mut Vec<u8>, aad: &[u8], nonce: &Self::Nonce) -> Result<(), AeadError>;
+}
diff --git a/nearby/crypto/crypto_provider/src/aes/ctr.rs b/nearby/crypto/crypto_provider/src/aes/ctr.rs
index acfe4ef..73d4f55 100644
--- a/nearby/crypto/crypto_provider/src/aes/ctr.rs
+++ b/nearby/crypto/crypto_provider/src/aes/ctr.rs
@@ -13,7 +13,15 @@
 // limitations under the License.
 
 //! Traits for AES-CTR.
-use super::AesKey;
+use super::{AesBlock, AesKey, BLOCK_SIZE};
+
+/// The number of bytes used for the nonce, with the remaining bytes in a block used as the counter.
+///
+/// Other lengths may be used, but 12 is a good general purpose choice.
+pub const AES_CTR_NONCE_LEN: usize = 12;
+
+/// The nonce portion of the nonce+counter block used by CTR mode.
+pub type AesCtrNonce = [u8; AES_CTR_NONCE_LEN];
 
 /// An implementation of AES-CTR.
 ///
@@ -26,10 +34,36 @@
     type Key: AesKey;
 
     /// Build a `Self` from key material.
-    fn new(key: &Self::Key, iv: [u8; 16]) -> Self;
+    fn new(key: &Self::Key, nonce_and_counter: NonceAndCounter) -> Self;
 
     /// Encrypt the data in place, advancing the counter state appropriately.
     fn encrypt(&mut self, data: &mut [u8]);
     /// Decrypt the data in place, advancing the counter state appropriately.
     fn decrypt(&mut self, data: &mut [u8]);
 }
+
+/// The combined nonce and counter that CTR increments and encrypts to form the keystream.
+pub struct NonceAndCounter {
+    block: AesBlock,
+}
+
+impl NonceAndCounter {
+    /// Appends 4 zero bytes of counter to the nonce
+    pub fn from_nonce(nonce: AesCtrNonce) -> Self {
+        let mut block = [0; BLOCK_SIZE];
+        block[..12].copy_from_slice(nonce.as_slice());
+        NonceAndCounter { block }
+    }
+
+    /// Initialize from an already concatenated nonce and counter
+    // Not recommended for general use, so restricted so only test vectors can use it
+    #[cfg(feature = "test_vectors")]
+    pub fn from_block(block: AesBlock) -> Self {
+        Self { block }
+    }
+
+    /// Nonce and counter as an AES block-sized byte array
+    pub fn as_block_array(&self) -> AesBlock {
+        self.block
+    }
+}
diff --git a/nearby/crypto/crypto_provider/src/aes/gcm_siv.rs b/nearby/crypto/crypto_provider/src/aes/gcm_siv.rs
deleted file mode 100644
index dabb10d..0000000
--- a/nearby/crypto/crypto_provider/src/aes/gcm_siv.rs
+++ /dev/null
@@ -1,48 +0,0 @@
-// Copyright 2023 Google LLC
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-//! Traits for AES-GCM-SIV.
-
-use super::AesKey;
-extern crate alloc;
-use alloc::vec::Vec;
-
-/// An enum for indicating issues with the GCM-SIV encryption/decryption operations.
-pub enum GcmSivError {
-    /// Returned if the output buffer is too small to store the resulting ciphertext + tag.
-    EncryptOutBufferTooSmall,
-    /// Returned if the ciphertext + tag combination does not match when decrypting a blob.
-    DecryptTagDoesNotMatch,
-}
-
-/// An implementation of AES-GCM-SIV.
-///
-/// An AesGcmSiv impl may be used for encryption and decryption.
-pub trait AesGcmSiv {
-    /// The [AesKey] this cipher uses. See [super::Aes128Key] and [super::Aes256Key] for the common AES-128 and
-    /// AES-256 cases.
-    type Key: AesKey;
-
-    /// Build a `Self` from key material.
-    fn new(key: &Self::Key) -> Self;
-
-    /// Encrypt the data in place with a nonce to make sure each ciphertext is unique.
-    /// This will need 16 bytes reserved in the data array for the tag.
-    /// Optionally, additional associated data can be passed in for computation of the cryptographic tag.
-    fn encrypt(&self, data: &mut Vec<u8>, aad: &[u8], nonce: &[u8]) -> Result<(), GcmSivError>;
-    /// Decrypt the ciphertext concatenated with its tag in place with the nonce used for encryption.
-    /// If associated data was passed in when creating the ciphertext, it should be passed in here as well
-    /// in order to properly decrypt the message.
-    fn decrypt(&self, data: &mut Vec<u8>, aad: &[u8], nonce: &[u8]) -> Result<(), GcmSivError>;
-}
diff --git a/nearby/crypto/crypto_provider/src/aes/mod.rs b/nearby/crypto/crypto_provider/src/aes/mod.rs
index 9526488..83e48de 100644
--- a/nearby/crypto/crypto_provider/src/aes/mod.rs
+++ b/nearby/crypto/crypto_provider/src/aes/mod.rs
@@ -16,17 +16,12 @@
 //!
 //! The design is an attempt to make it easy to provide implementations that are both idiomatic
 //! Rust (e.g. RustCrypto) as well as FFI-backed (e.g. openssl and other C impls).
-#![forbid(unsafe_code)]
-#![deny(missing_docs)]
-
 use core::{array, fmt};
 
 pub mod ctr;
 
 #[cfg(feature = "alloc")]
 pub mod cbc;
-#[cfg(feature = "gcm_siv")]
-pub mod gcm_siv;
 
 /// Block size in bytes for AES (and XTS-AES)
 pub const BLOCK_SIZE: usize = 16;
diff --git a/nearby/crypto/crypto_provider/src/ed25519.rs b/nearby/crypto/crypto_provider/src/ed25519.rs
index e8fc176..48c2c50 100644
--- a/nearby/crypto/crypto_provider/src/ed25519.rs
+++ b/nearby/crypto/crypto_provider/src/ed25519.rs
@@ -28,11 +28,20 @@
 /// The length of a ed25519 `Signature`, in bytes.
 pub const SIGNATURE_LENGTH: usize = 64;
 
-/// The length of an ed25519 `KeyPair`, in bytes.
-pub const KEY_PAIR_LENGTH: usize = 64;
+/// The length of an ed25519 `PrivateKey`, in bytes.
+pub const PRIVATE_KEY_LENGTH: usize = 32;
 
-/// The length of an ed25519 `PublicKey`, in bytes.
-pub const KEY_LENGTH: usize = 32;
+/// The length of an ed25519 `PrivateKey`, in bytes.
+pub const PUBLIC_KEY_LENGTH: usize = 32;
+
+/// A byte buffer the size of a ed25519 `Signature`.
+pub type RawSignature = [u8; SIGNATURE_LENGTH];
+
+/// A byte buffer the size of a ed25519 `PublicKey`.
+pub type RawPublicKey = [u8; PUBLIC_KEY_LENGTH];
+
+/// A byte buffer the size of a ed25519 `PrivateKey`.
+pub type RawPrivateKey = [u8; PRIVATE_KEY_LENGTH];
 
 /// The keypair which includes both public and secret halves of an asymmetric key.
 pub trait KeyPair: Sized {
@@ -42,17 +51,13 @@
     /// The ed25519 signature returned when signing a message
     type Signature: Signature;
 
-    /// Converts the key-pair to an array of bytes consisting
-    /// of the bytes of the private key followed by the bytes
-    /// of the public key. This method should only ever be called
-    /// by code which securely stores private credentials.
-    fn to_bytes(&self) -> [u8; KEY_PAIR_LENGTH];
+    /// Returns the private key bytes of the `KeyPair`.
+    /// This method should only ever be called by code which securely stores private credentials.
+    fn private_key(&self) -> RawPrivateKey;
 
-    /// Builds this key-pair from an array of bytes in the
-    /// format yielded by `to_bytes`. This method should
-    /// only ever be called by code which securely stores private
-    /// credentials.
-    fn from_bytes(bytes: [u8; KEY_PAIR_LENGTH]) -> Result<Self, InvalidBytes>
+    /// Builds a key-pair from a `RawPrivateKey` array of bytes.
+    /// This should only ever be called by code which securely stores private credentials.
+    fn from_private_key(bytes: &RawPrivateKey) -> Self
     where
         Self: Sized;
 
@@ -73,10 +78,10 @@
     /// Create a new signature from a byte slice, and return an error on an invalid signature
     /// An `Ok` result does not guarantee that the Signature is valid, however it will catch a
     /// number of invalid signatures relatively inexpensively.
-    fn from_bytes(bytes: &[u8]) -> Result<Self, InvalidSignature>;
+    fn from_bytes(bytes: &RawSignature) -> Self;
 
     /// Returns a slice of the signature bytes
-    fn to_bytes(&self) -> [u8; SIGNATURE_LENGTH];
+    fn to_bytes(&self) -> RawSignature;
 }
 
 /// An ed25519 public key
@@ -86,12 +91,12 @@
 
     /// Builds this public key from an array of bytes in
     /// the format yielded by `to_bytes`.
-    fn from_bytes(bytes: [u8; KEY_LENGTH]) -> Result<Self, InvalidBytes>
+    fn from_bytes(bytes: &RawPublicKey) -> Result<Self, InvalidBytes>
     where
         Self: Sized;
 
     /// Yields the bytes of the public key
-    fn to_bytes(&self) -> [u8; KEY_LENGTH];
+    fn to_bytes(&self) -> RawPublicKey;
 
     /// Succeeds if the signature was a valid signature created by this Keypair on the prehashed_message.
     fn verify_strict(
@@ -108,7 +113,3 @@
 /// Error returned if the verification on the signature + message fails
 #[derive(Debug)]
 pub struct SignatureError;
-
-/// Error returned if invalid signature bytes are provided
-#[derive(Debug)]
-pub struct InvalidSignature;
diff --git a/nearby/crypto/crypto_provider/src/hmac.rs b/nearby/crypto/crypto_provider/src/hmac.rs
index c5a9ae1..e7f6d0c 100644
--- a/nearby/crypto/crypto_provider/src/hmac.rs
+++ b/nearby/crypto/crypto_provider/src/hmac.rs
@@ -38,7 +38,7 @@
 
 /// Error type for when the output of the hmac operation
 /// is not equal to the expected value.
-#[derive(Debug)]
+#[derive(Debug, PartialEq, Eq)]
 pub struct MacError;
 
 /// Error output when the provided key material length is invalid
diff --git a/nearby/crypto/crypto_provider/src/lib.rs b/nearby/crypto/crypto_provider/src/lib.rs
index 3ebaf9b..624072a 100644
--- a/nearby/crypto/crypto_provider/src/lib.rs
+++ b/nearby/crypto/crypto_provider/src/lib.rs
@@ -39,9 +39,12 @@
 /// mod containing SHA256 trait.
 pub mod sha2;
 
-/// mod containing aes trait
+/// mod containing aes trait.
 pub mod aes;
 
+/// mod containing aead trait.
+pub mod aead;
+
 /// mod containing traits for ed25519 key generation, signing, and verification
 pub mod ed25519;
 
@@ -77,11 +80,9 @@
     /// using SHA-512 (SHA-2) and Curve25519
     type Ed25519: ed25519::Ed25519Provider;
     /// The trait defining AES-128-GCM-SIV, a nonce-misuse resistant AEAD with a key size of 16 bytes.
-    #[cfg(feature = "gcm_siv")]
-    type Aes128GcmSiv: aes::gcm_siv::AesGcmSiv<Key = Aes128Key>;
+    type Aes128GcmSiv: aead::aes_gcm_siv::AesGcmSiv<Key = Aes128Key>;
     /// The trait defining AES-256-GCM-SIV, a nonce-misuse resistant AEAD with a key size of 32 bytes.
-    #[cfg(feature = "gcm_siv")]
-    type Aes256GcmSiv: aes::gcm_siv::AesGcmSiv<Key = Aes256Key>;
+    type Aes256GcmSiv: aead::aes_gcm_siv::AesGcmSiv<Key = Aes256Key>;
 
     /// The cryptographically secure random number generator
     type CryptoRng: CryptoRng;
@@ -101,11 +102,12 @@
     /// Fill dest with random data
     fn fill(&mut self, dest: &mut [u8]);
 
-    /// Generate a random byte
-    fn gen<U8>(&mut self) -> u8 {
-        let mut arr = [0u8; 1];
-        self.fill(&mut arr);
-        arr[0]
+    /// Generate a random entity
+    fn gen<F: FromCryptoRng>(&mut self) -> F
+    where
+        Self: Sized,
+    {
+        F::new_random::<Self>(self)
     }
 }
 
@@ -121,3 +123,24 @@
         unimplemented!()
     }
 }
+
+/// For types that can be created from a `CryptoRng`
+pub trait FromCryptoRng {
+    /// Construct a new `Self` with random data from `rng`
+    fn new_random<R: CryptoRng>(rng: &mut R) -> Self;
+}
+
+impl<const N: usize> FromCryptoRng for [u8; N] {
+    fn new_random<R: CryptoRng>(rng: &mut R) -> Self {
+        let mut arr = [0; N];
+        rng.fill(&mut arr);
+        arr
+    }
+}
+
+impl FromCryptoRng for u8 {
+    fn new_random<R: CryptoRng>(rng: &mut R) -> Self {
+        let arr: [u8; 1] = rng.gen();
+        arr[0]
+    }
+}
diff --git a/nearby/crypto/crypto_provider_boringssl/src/aes.rs b/nearby/crypto/crypto_provider_boringssl/src/aes.rs
index fc97db2..88bfeac 100644
--- a/nearby/crypto/crypto_provider_boringssl/src/aes.rs
+++ b/nearby/crypto/crypto_provider_boringssl/src/aes.rs
@@ -49,9 +49,7 @@
     type Key = Aes128Key;
 
     fn new(key: &Self::Key) -> Self {
-        Self(bssl_crypto::aes::AesEncryptKey::new_aes_128(
-            *key.as_array(),
-        ))
+        Self(bssl_crypto::aes::AesEncryptKey::new_aes_128(*key.as_array()))
     }
 }
 
@@ -65,9 +63,7 @@
     type Key = Aes128Key;
 
     fn new(key: &Self::Key) -> Self {
-        Self(bssl_crypto::aes::AesDecryptKey::new_aes_128(
-            *key.as_array(),
-        ))
+        Self(bssl_crypto::aes::AesDecryptKey::new_aes_128(*key.as_array()))
     }
 }
 
@@ -81,9 +77,7 @@
     type Key = Aes256Key;
 
     fn new(key: &Self::Key) -> Self {
-        Self(bssl_crypto::aes::AesEncryptKey::new_aes_256(
-            *key.as_array(),
-        ))
+        Self(bssl_crypto::aes::AesEncryptKey::new_aes_256(*key.as_array()))
     }
 }
 
@@ -97,9 +91,7 @@
     type Key = Aes256Key;
 
     fn new(key: &Self::Key) -> Self {
-        Self(bssl_crypto::aes::AesDecryptKey::new_aes_256(
-            *key.as_array(),
-        ))
+        Self(bssl_crypto::aes::AesDecryptKey::new_aes_256(*key.as_array()))
     }
 }
 
diff --git a/nearby/crypto/crypto_provider_boringssl/src/ed25519.rs b/nearby/crypto/crypto_provider_boringssl/src/ed25519.rs
new file mode 100644
index 0000000..7c671ae
--- /dev/null
+++ b/nearby/crypto/crypto_provider_boringssl/src/ed25519.rs
@@ -0,0 +1,111 @@
+// Copyright 2023 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+use crypto_provider::ed25519::{
+    InvalidBytes, RawPrivateKey, RawPublicKey, RawSignature, Signature as _, SignatureError,
+};
+
+pub struct Ed25519;
+
+impl crypto_provider::ed25519::Ed25519Provider for Ed25519 {
+    type KeyPair = KeyPair;
+    type PublicKey = PublicKey;
+    type Signature = Signature;
+}
+
+pub struct KeyPair(bssl_crypto::ed25519::PrivateKey);
+
+impl crypto_provider::ed25519::KeyPair for KeyPair {
+    type PublicKey = PublicKey;
+    type Signature = Signature;
+
+    fn private_key(&self) -> RawPrivateKey {
+        self.0.to_seed()
+    }
+
+    fn from_private_key(bytes: &RawPrivateKey) -> Self
+    where
+        Self: Sized,
+    {
+        let private_key = bssl_crypto::ed25519::PrivateKey::new_from_seed(bytes);
+        Self(private_key)
+    }
+
+    fn sign(&self, msg: &[u8]) -> Self::Signature {
+        Signature(self.0.sign(msg))
+    }
+
+    fn generate() -> Self {
+        Self(bssl_crypto::ed25519::PrivateKey::generate())
+    }
+
+    fn public(&self) -> Self::PublicKey {
+        PublicKey(self.0.public())
+    }
+}
+
+pub struct Signature(bssl_crypto::ed25519::Signature);
+
+impl crypto_provider::ed25519::Signature for Signature {
+    fn from_bytes(bytes: &RawSignature) -> Self {
+        Self(bssl_crypto::ed25519::Signature::from_bytes(*bytes))
+    }
+
+    fn to_bytes(&self) -> RawSignature {
+        self.0.to_bytes()
+    }
+}
+
+pub struct PublicKey(bssl_crypto::ed25519::PublicKey);
+
+impl crypto_provider::ed25519::PublicKey for PublicKey {
+    type Signature = Signature;
+
+    fn from_bytes(bytes: &RawPublicKey) -> Result<Self, InvalidBytes>
+    where
+        Self: Sized,
+    {
+        Ok(Self(bssl_crypto::ed25519::PublicKey::from_bytes(*bytes)))
+    }
+
+    fn to_bytes(&self) -> RawPublicKey {
+        self.0.to_bytes()
+    }
+
+    fn verify_strict(
+        &self,
+        message: &[u8],
+        signature: &Self::Signature,
+    ) -> Result<(), SignatureError> {
+        self.0
+            .verify(message, bssl_crypto::ed25519::Signature::from_bytes(signature.to_bytes()))
+            .map_err(|_| SignatureError)
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+    use crypto_provider_test::ed25519::{run_rfc_test_vectors, run_wycheproof_test_vectors};
+
+    #[test]
+    fn wycheproof_test_ed25519_boringssl() {
+        run_wycheproof_test_vectors::<Ed25519>()
+    }
+
+    #[test]
+    fn rfc_test_ed25519_boringssl() {
+        run_rfc_test_vectors::<Ed25519>()
+    }
+}
diff --git a/nearby/crypto/crypto_provider_boringssl/src/hkdf.rs b/nearby/crypto/crypto_provider_boringssl/src/hkdf.rs
index 3672bb1..c162d3d 100644
--- a/nearby/crypto/crypto_provider_boringssl/src/hkdf.rs
+++ b/nearby/crypto/crypto_provider_boringssl/src/hkdf.rs
@@ -15,8 +15,8 @@
 //! BoringSSL based HKDF implementation. Unfortunately, because the OpenSSL and BoringSSL APIs
 //! diverged for HKDF, we have to have separate implementations.
 //!
-//! See the _Using BoringSSL_ section in `nearby/scripts/prepare_boringssl.sh` for instructions on
-//! how to test against BoringSSL.
+//! See the _Using BoringSSL_ section in `crypto/README.md` for instructions on
+//! how to test against BoringSSL, or see the subcommands in the top level crate.
 
 use bssl_crypto::digest::Md;
 use crypto_provider::hkdf::InvalidLength;
@@ -37,9 +37,7 @@
         if okm.is_empty() {
             return Ok(());
         }
-        self.0
-            .expand_multi_info(info_components, okm)
-            .map_err(|_| InvalidLength)
+        self.0.expand_multi_info(info_components, okm).map_err(|_| InvalidLength)
     }
 
     fn expand(&self, info: &[u8], okm: &mut [u8]) -> Result<(), InvalidLength> {
diff --git a/nearby/crypto/crypto_provider_boringssl/src/lib.rs b/nearby/crypto/crypto_provider_boringssl/src/lib.rs
index 6618bab..3b78898 100644
--- a/nearby/crypto/crypto_provider_boringssl/src/lib.rs
+++ b/nearby/crypto/crypto_provider_boringssl/src/lib.rs
@@ -37,6 +37,9 @@
 /// Implementations of crypto_provider::hmac traits backed by BoringSSL
 pub mod hmac;
 
+/// Implementations of crypto_provider::ed25519 traits backed by BoringSSL
+mod ed25519;
+
 /// The BoringSSL backed struct which implements CryptoProvider
 #[derive(Default, Clone, Debug, PartialEq, Eq)]
 pub struct Boringssl;
@@ -55,7 +58,7 @@
     type Aes256 = aes::Aes256;
     type AesCtr128 = Aes128Stubs;
     type AesCtr256 = Aes256Stubs;
-    type Ed25519 = Ed25519Stubs;
+    type Ed25519 = ed25519::Ed25519;
     type Aes128GcmSiv = Aes128Stubs;
     type Aes256GcmSiv = Aes256Stubs;
     type CryptoRng = BoringSslRng;
diff --git a/nearby/crypto/crypto_provider_default/Cargo.toml b/nearby/crypto/crypto_provider_default/Cargo.toml
index f78ad8e..2a155bf 100644
--- a/nearby/crypto/crypto_provider_default/Cargo.toml
+++ b/nearby/crypto/crypto_provider_default/Cargo.toml
@@ -12,8 +12,9 @@
 cfg-if.workspace = true
 
 [features]
-std = ["crypto_provider_rustcrypto/std"]
 default = ["rustcrypto"]
+std = ["crypto_provider_rustcrypto/std"]
 rustcrypto = ["crypto_provider_rustcrypto"]
 boringssl = ["crypto_provider_boringssl"]
 opensslbssl = ["crypto_provider_openssl/boringssl"]
+openssl = ["crypto_provider_openssl"]
diff --git a/nearby/crypto/crypto_provider_default/src/lib.rs b/nearby/crypto/crypto_provider_default/src/lib.rs
index 831698b..4b1b01e 100644
--- a/nearby/crypto/crypto_provider_default/src/lib.rs
+++ b/nearby/crypto/crypto_provider_default/src/lib.rs
@@ -20,7 +20,7 @@
         pub use crypto_provider_rustcrypto::RustCrypto as CryptoProviderImpl;
     } else if #[cfg(feature = "boringssl")] {
         pub use crypto_provider_boringssl::Boringssl as CryptoProviderImpl;
-    } else if #[cfg(feature = "openssl")] {
+    } else if #[cfg(any(feature = "openssl", feature = "opensslbssl"))] {
         pub use crypto_provider_openssl::Openssl as CryptoProviderImpl;
     } else {
         compile_error!("No crypto_provider feature enabled!");
diff --git a/nearby/crypto/crypto_provider_openssl/Cargo.toml b/nearby/crypto/crypto_provider_openssl/Cargo.toml
index 8fa6faa..ef4a009 100644
--- a/nearby/crypto/crypto_provider_openssl/Cargo.toml
+++ b/nearby/crypto/crypto_provider_openssl/Cargo.toml
@@ -5,7 +5,8 @@
 publish.workspace = true
 
 [dependencies]
-crypto_provider = { path = "../crypto_provider", default-features = false, features = ["alloc", "std"] }
+crypto_provider = { workspace = true, features = ["alloc", "std"] }
+crypto_provider_stubs.workspace = true
 openssl.workspace = true
 cfg-if.workspace = true
 
@@ -13,7 +14,7 @@
 
 [features]
 default = []
-boringssl = ["openssl/unstable_boringssl", "crypto_provider/gcm_siv"]
+boringssl = ["openssl/unstable_boringssl"]
 
 [dev-dependencies]
 crypto_provider_test.workspace = true
diff --git a/nearby/crypto/crypto_provider_openssl/src/aes.rs b/nearby/crypto/crypto_provider_openssl/src/aes.rs
index 55a3dd2..f5d5b00 100644
--- a/nearby/crypto/crypto_provider_openssl/src/aes.rs
+++ b/nearby/crypto/crypto_provider_openssl/src/aes.rs
@@ -26,9 +26,9 @@
 
 use openssl::symm::{Cipher, Crypter, Mode};
 
-use crypto_provider::aes::cbc::{AesCbcIv, DecryptionError};
-use crypto_provider::aes::gcm_siv::{AesGcmSiv, GcmSivError};
 use crypto_provider::aes::{
+    cbc::{AesCbcIv, DecryptionError},
+    ctr::NonceAndCounter,
     Aes, Aes128Key, Aes256Key, AesBlock, AesCipher, AesDecryptCipher, AesEncryptCipher, AesKey,
 };
 
@@ -65,13 +65,8 @@
     fn encrypt(&self, block: &mut AesBlock) {
         // openssl requires the output to be at least 32 bytes long
         let mut output = [0_u8; 32];
-        let mut crypter = Crypter::new(
-            Cipher::aes_128_ecb(),
-            Mode::Encrypt,
-            self.0.as_slice(),
-            None,
-        )
-        .unwrap();
+        let mut crypter =
+            Crypter::new(Cipher::aes_128_ecb(), Mode::Encrypt, self.0.as_slice(), None).unwrap();
         crypter.pad(false);
         crypter.update(block, &mut output).unwrap();
         block.copy_from_slice(&output[..crypto_provider::aes::BLOCK_SIZE]);
@@ -82,13 +77,8 @@
     fn decrypt(&self, block: &mut AesBlock) {
         // openssl requires the output to be at least 32 bytes long
         let mut output = [0_u8; 32];
-        let mut crypter = Crypter::new(
-            Cipher::aes_128_ecb(),
-            Mode::Decrypt,
-            self.0.as_slice(),
-            None,
-        )
-        .unwrap();
+        let mut crypter =
+            Crypter::new(Cipher::aes_128_ecb(), Mode::Decrypt, self.0.as_slice(), None).unwrap();
         crypter.pad(false);
         crypter.update(block, &mut output).unwrap();
         block.copy_from_slice(&output[..crypto_provider::aes::BLOCK_SIZE]);
@@ -110,13 +100,8 @@
     fn encrypt(&self, block: &mut AesBlock) {
         // openssl requires the output to be at least 32 bytes long
         let mut output = [0_u8; 32];
-        let mut crypter = Crypter::new(
-            Cipher::aes_256_ecb(),
-            Mode::Encrypt,
-            self.0.as_slice(),
-            None,
-        )
-        .unwrap();
+        let mut crypter =
+            Crypter::new(Cipher::aes_256_ecb(), Mode::Encrypt, self.0.as_slice(), None).unwrap();
         crypter.pad(false);
         crypter.update(block, &mut output).unwrap();
         block.copy_from_slice(&output[..crypto_provider::aes::BLOCK_SIZE]);
@@ -127,13 +112,8 @@
     fn decrypt(&self, block: &mut AesBlock) {
         // openssl requires the output to be at least 32 bytes long
         let mut output = [0_u8; 32];
-        let mut crypter = Crypter::new(
-            Cipher::aes_256_ecb(),
-            Mode::Decrypt,
-            self.0.as_slice(),
-            None,
-        )
-        .unwrap();
+        let mut crypter =
+            Crypter::new(Cipher::aes_256_ecb(), Mode::Decrypt, self.0.as_slice(), None).unwrap();
         crypter.pad(false);
         crypter.update(block, &mut output).unwrap();
         block.copy_from_slice(&output[..crypto_provider::aes::BLOCK_SIZE]);
@@ -145,13 +125,8 @@
 
 impl crypto_provider::aes::cbc::AesCbcPkcs7Padded for OpenSslAesCbcPkcs7 {
     fn encrypt(key: &crypto_provider::aes::Aes256Key, iv: &AesCbcIv, message: &[u8]) -> Vec<u8> {
-        openssl::symm::encrypt(
-            Cipher::aes_256_cbc(),
-            key.as_slice(),
-            Some(iv.as_slice()),
-            message,
-        )
-        .unwrap()
+        openssl::symm::encrypt(Cipher::aes_256_cbc(), key.as_slice(), Some(iv.as_slice()), message)
+            .unwrap()
     }
 
     fn decrypt(
@@ -177,20 +152,20 @@
 
 impl crypto_provider::aes::ctr::AesCtr for OpenSslAesCtr128 {
     type Key = crypto_provider::aes::Aes128Key;
-    fn new(key: &Self::Key, iv: [u8; 16]) -> Self {
+    fn new(key: &Self::Key, nonce_and_counter: NonceAndCounter) -> Self {
         Self {
             enc_cipher: Crypter::new(
                 Cipher::aes_128_ctr(),
                 Mode::Encrypt,
                 key.as_slice(),
-                Some(&iv),
+                Some(&nonce_and_counter.as_block_array()),
             )
             .unwrap(),
             dec_cipher: Crypter::new(
                 Cipher::aes_128_ctr(),
                 Mode::Decrypt,
                 key.as_slice(),
-                Some(&iv),
+                Some(&nonce_and_counter.as_block_array()),
             )
             .unwrap(),
         }
@@ -217,20 +192,20 @@
 
 impl crypto_provider::aes::ctr::AesCtr for OpenSslAesCtr256 {
     type Key = crypto_provider::aes::Aes256Key;
-    fn new(key: &Self::Key, iv: [u8; 16]) -> Self {
+    fn new(key: &Self::Key, nonce_and_counter: NonceAndCounter) -> Self {
         Self {
             enc_cipher: Crypter::new(
                 Cipher::aes_256_ctr(),
                 Mode::Encrypt,
                 key.as_slice(),
-                Some(&iv),
+                Some(&nonce_and_counter.as_block_array()),
             )
             .unwrap(),
             dec_cipher: Crypter::new(
                 Cipher::aes_256_ctr(),
                 Mode::Decrypt,
                 key.as_slice(),
-                Some(&iv),
+                Some(&nonce_and_counter.as_block_array()),
             )
             .unwrap(),
         }
@@ -249,43 +224,6 @@
     }
 }
 
-/// Unimplemented AES-GCM-SIV implementation.
-pub struct OpenSslAesGcmSiv128;
-
-impl AesGcmSiv for OpenSslAesGcmSiv128 {
-    type Key = Aes128Key;
-
-    fn new(_key: &Self::Key) -> Self {
-        todo!()
-    }
-
-    fn encrypt(&self, _data: &mut Vec<u8>, _aad: &[u8], _nonce: &[u8]) -> Result<(), GcmSivError> {
-        todo!()
-    }
-
-    fn decrypt(&self, _data: &mut Vec<u8>, _aad: &[u8], _nonce: &[u8]) -> Result<(), GcmSivError> {
-        todo!()
-    }
-}
-
-pub struct OpenSslAesGcmSiv256;
-
-impl AesGcmSiv for OpenSslAesGcmSiv256 {
-    type Key = Aes256Key;
-
-    fn new(_key: &Self::Key) -> Self {
-        todo!()
-    }
-
-    fn encrypt(&self, _data: &mut Vec<u8>, _aad: &[u8], _nonce: &[u8]) -> Result<(), GcmSivError> {
-        todo!()
-    }
-
-    fn decrypt(&self, _data: &mut Vec<u8>, _aad: &[u8], _nonce: &[u8]) -> Result<(), GcmSivError> {
-        todo!()
-    }
-}
-
 #[cfg(test)]
 mod tests {
     use core::marker::PhantomData;
diff --git a/nearby/crypto/crypto_provider_openssl/src/ed25519.rs b/nearby/crypto/crypto_provider_openssl/src/ed25519.rs
index 1384a06..110daf2 100644
--- a/nearby/crypto/crypto_provider_openssl/src/ed25519.rs
+++ b/nearby/crypto/crypto_provider_openssl/src/ed25519.rs
@@ -13,8 +13,7 @@
 // limitations under the License.
 
 use crypto_provider::ed25519::{
-    InvalidBytes, InvalidSignature, Signature as _, SignatureError, KEY_LENGTH, KEY_PAIR_LENGTH,
-    SIGNATURE_LENGTH,
+    InvalidBytes, RawPrivateKey, RawPublicKey, RawSignature, Signature as _, SignatureError,
 };
 use openssl::pkey::{Id, PKey, Private};
 use openssl::sign::{Signer, Verifier};
@@ -33,7 +32,7 @@
     type PublicKey = PublicKey;
     type Signature = Signature;
 
-    fn to_bytes(&self) -> [u8; KEY_PAIR_LENGTH] {
+    fn private_key(&self) -> RawPrivateKey {
         let private_key = self.0.raw_private_key().unwrap();
         let mut public_key = self.0.raw_public_key().unwrap();
         let mut result = private_key;
@@ -41,22 +40,20 @@
         result.try_into().unwrap()
     }
 
-    fn from_bytes(bytes: [u8; KEY_PAIR_LENGTH]) -> Result<Self, InvalidBytes> {
-        PKey::private_key_from_raw_bytes(&bytes[..KEY_LENGTH], Id::ED25519)
-            .map(Self)
-            .map_err(|_| InvalidBytes)
+    fn from_private_key(bytes: &RawPrivateKey) -> Self {
+        Self(PKey::private_key_from_raw_bytes(bytes, Id::ED25519).unwrap())
     }
 
     fn sign(&self, msg: &[u8]) -> Self::Signature {
         let mut signer =
             Signer::new_without_digest(&self.0).expect("should be able to create a signer");
-        let sig_bytes: [u8; SIGNATURE_LENGTH] = signer
+        let sig_bytes: RawSignature = signer
             .sign_oneshot_to_vec(msg)
             .expect("singing should succeed")
             .try_into()
             .expect("signature should be a valid size");
 
-        Self::Signature::from_bytes(&sig_bytes).expect("this should never fail")
+        Self::Signature::from_bytes(&sig_bytes)
     }
 
     fn generate() -> Self {
@@ -66,21 +63,19 @@
 
     fn public(&self) -> Self::PublicKey {
         PublicKey(
-            self.0
-                .raw_public_key()
-                .expect("should be able to get a pubic key from a keypair"),
+            self.0.raw_public_key().expect("should be able to get a pubic key from a keypair"),
         )
     }
 }
 
-pub struct Signature([u8; SIGNATURE_LENGTH]);
+pub struct Signature(RawSignature);
 
 impl crypto_provider::ed25519::Signature for Signature {
-    fn from_bytes(bytes: &[u8]) -> Result<Self, InvalidSignature> {
-        bytes.try_into().map(Self).map_err(|_| InvalidSignature)
+    fn from_bytes(bytes: &RawSignature) -> Self {
+        Self(*bytes)
     }
 
-    fn to_bytes(&self) -> [u8; SIGNATURE_LENGTH] {
+    fn to_bytes(&self) -> RawSignature {
         self.0
     }
 }
@@ -90,14 +85,14 @@
 impl crypto_provider::ed25519::PublicKey for PublicKey {
     type Signature = Signature;
 
-    fn from_bytes(bytes: [u8; KEY_LENGTH]) -> Result<Self, InvalidBytes>
+    fn from_bytes(bytes: &RawPublicKey) -> Result<Self, InvalidBytes>
     where
         Self: Sized,
     {
         Ok(PublicKey(bytes.to_vec()))
     }
 
-    fn to_bytes(&self) -> [u8; KEY_LENGTH] {
+    fn to_bytes(&self) -> RawPublicKey {
         //Should be length 32
         self.0.as_slice().try_into().unwrap()
     }
diff --git a/nearby/crypto/crypto_provider_openssl/src/hkdf_boringssl.rs b/nearby/crypto/crypto_provider_openssl/src/hkdf_boringssl.rs
index eb23b3b..152cdfc 100644
--- a/nearby/crypto/crypto_provider_openssl/src/hkdf_boringssl.rs
+++ b/nearby/crypto/crypto_provider_openssl/src/hkdf_boringssl.rs
@@ -15,8 +15,8 @@
 //! BoringSSL based HKDF implementation. Unfortunately, because the OpenSSL and BoringSSL APIs
 //! diverged for HKDF, we have to have separate implementations.
 //!
-//! See the _Using BoringSSL_ section in `nearby/scripts/prepare_boringssl.sh` for instructions on
-//! how to test against BoringSSL.
+//! See the _Using BoringSSL_ section in `crypto/README.md` for instructions on
+//! how to test against BoringSSL, or see the subcommands in the top level crate.
 
 use crate::OpenSslHash;
 use crypto_provider::hkdf::InvalidLength;
@@ -31,11 +31,7 @@
 
 impl<H: OpenSslHash> crypto_provider::hkdf::Hkdf for Hkdf<H> {
     fn new(salt: Option<&[u8]>, ikm: &[u8]) -> Self {
-        Self {
-            _marker: Default::default(),
-            salt: salt.map(Vec::from),
-            ikm: Vec::from(ikm),
-        }
+        Self { _marker: Default::default(), salt: salt.map(Vec::from), ikm: Vec::from(ikm) }
     }
 
     fn expand_multi_info(
diff --git a/nearby/crypto/crypto_provider_openssl/src/hkdf_openssl.rs b/nearby/crypto/crypto_provider_openssl/src/hkdf_openssl.rs
index c578ed7..d429a4d 100644
--- a/nearby/crypto/crypto_provider_openssl/src/hkdf_openssl.rs
+++ b/nearby/crypto/crypto_provider_openssl/src/hkdf_openssl.rs
@@ -25,11 +25,7 @@
 
 impl<H: OpenSslHash> crypto_provider::hkdf::Hkdf for Hkdf<H> {
     fn new(salt: Option<&[u8]>, ikm: &[u8]) -> Self {
-        Self {
-            _marker: Default::default(),
-            salt: salt.map(Vec::from),
-            ikm: Vec::from(ikm),
-        }
+        Self { _marker: Default::default(), salt: salt.map(Vec::from), ikm: Vec::from(ikm) }
     }
 
     fn expand_multi_info(
@@ -46,13 +42,9 @@
         let md = H::get_md();
         ctx.derive_init().expect("hkdf derive init should not fail");
         ctx.set_hkdf_md(md).expect("hkdf set md should not fail");
-        self.salt
-            .as_ref()
-            .map(|salt| ctx.set_hkdf_salt(salt.as_slice()));
-        ctx.set_hkdf_key(self.ikm.as_slice())
-            .expect("should be able to set key");
-        ctx.add_hkdf_info(&info_components.concat())
-            .expect("should be able to add info");
+        self.salt.as_ref().map(|salt| ctx.set_hkdf_salt(salt.as_slice()));
+        ctx.set_hkdf_key(self.ikm.as_slice()).expect("should be able to set key");
+        ctx.add_hkdf_info(&info_components.concat()).expect("should be able to add info");
         ctx.derive(Some(okm)).map_err(|_| InvalidLength).map(|_| ())
     }
 
diff --git a/nearby/crypto/crypto_provider_openssl/src/hmac_boringssl.rs b/nearby/crypto/crypto_provider_openssl/src/hmac_boringssl.rs
index 2202d7e..9b86726 100644
--- a/nearby/crypto/crypto_provider_openssl/src/hmac_boringssl.rs
+++ b/nearby/crypto/crypto_provider_openssl/src/hmac_boringssl.rs
@@ -16,8 +16,8 @@
 //! diverged (https://boringssl.googlesource.com/boringssl/+/HEAD/PORTING.md#hmac-s), we have to
 //! have separate implementations.
 //!
-//! See the _Using BoringSSL_ section in `nearby/scripts/prepare_boringssl.sh` for instructions on
-//! how to test against BoringSSL.
+//! See the _Using BoringSSL_ section in `crypto/README.md` for instructions on
+//! how to test against BoringSSL, or see the subcommands in the top level crate.
 
 use crate::{sha2::OpenSslSha256, sha2::OpenSslSha512, OpenSslHash};
 use crypto_provider::hmac::{InvalidLength, MacError};
@@ -37,23 +37,15 @@
 
 impl<const N: usize, H: Hash<N>> crypto_provider::hmac::Hmac<N> for Hmac<H> {
     fn new_from_key(key: [u8; N]) -> Self {
-        Self {
-            marker: PhantomData,
-            ctx: HmacCtx::new(&key, H::get_md()).unwrap(),
-        }
+        Self { marker: PhantomData, ctx: HmacCtx::new(&key, H::get_md()).unwrap() }
     }
 
     fn new_from_slice(key: &[u8]) -> Result<Self, InvalidLength> {
-        Ok(Self {
-            marker: PhantomData,
-            ctx: HmacCtx::new(key, H::get_md()).unwrap(),
-        })
+        Ok(Self { marker: PhantomData, ctx: HmacCtx::new(key, H::get_md()).unwrap() })
     }
 
     fn update(&mut self, data: &[u8]) {
-        self.ctx
-            .update(data)
-            .expect("should be able to update signer");
+        self.ctx.update(data).expect("should be able to update signer");
     }
 
     fn finalize(mut self) -> [u8; N] {
diff --git a/nearby/crypto/crypto_provider_openssl/src/hmac_openssl.rs b/nearby/crypto/crypto_provider_openssl/src/hmac_openssl.rs
index 3cff10f..42f857e 100644
--- a/nearby/crypto/crypto_provider_openssl/src/hmac_openssl.rs
+++ b/nearby/crypto/crypto_provider_openssl/src/hmac_openssl.rs
@@ -95,7 +95,7 @@
     let digest = H::get_digest();
     HmacBuilder {
         ctx,
-        marker: PhantomData::default(),
+        marker: PhantomData,
         signer_builder: |ctx: &openssl::pkey::PKey<openssl::pkey::Private>| {
             Signer::new(digest, ctx).expect("should be able to create signer")
         },
@@ -110,16 +110,12 @@
 }
 
 fn new_from_slice<H: OpenSslHash>(key: &[u8]) -> Result<Hmac<H>, InvalidLength> {
-    openssl::pkey::PKey::hmac(key)
-        .map(hmac_from_builder)
-        .map_err(|_| InvalidLength)
+    openssl::pkey::PKey::hmac(key).map(hmac_from_builder).map_err(|_| InvalidLength)
 }
 
 fn update<H: OpenSslHash>(hmac: &mut Hmac<H>, data: &[u8]) {
     hmac.with_signer_mut(|signer| {
-        signer
-            .update(data)
-            .expect("should be able to update signer");
+        signer.update(data).expect("should be able to update signer");
     })
 }
 
@@ -133,10 +129,7 @@
 }
 
 fn verify_slice<H: OpenSslHash>(hmac: Hmac<H>, tag: &[u8]) -> Result<(), MacError> {
-    let binding = hmac
-        .borrow_signer()
-        .sign_to_vec()
-        .expect("sign to vec should succeed");
+    let binding = hmac.borrow_signer().sign_to_vec().expect("sign to vec should succeed");
     let slice = binding.as_slice();
     if memcmp::eq(slice, tag) {
         Ok(())
@@ -146,10 +139,7 @@
 }
 
 fn verify<const N: usize, H: OpenSslHash>(hmac: Hmac<H>, tag: [u8; N]) -> Result<(), MacError> {
-    let binding = hmac
-        .borrow_signer()
-        .sign_to_vec()
-        .expect("sign to vec should succeed");
+    let binding = hmac.borrow_signer().sign_to_vec().expect("sign to vec should succeed");
     let slice = binding.as_slice();
     if memcmp::eq(slice, &tag) {
         Ok(())
@@ -159,10 +149,7 @@
 }
 
 fn verify_truncated_left<H: OpenSslHash>(hmac: Hmac<H>, tag: &[u8]) -> Result<(), MacError> {
-    let binding = hmac
-        .borrow_signer()
-        .sign_to_vec()
-        .expect("sign to vec should succeed");
+    let binding = hmac.borrow_signer().sign_to_vec().expect("sign to vec should succeed");
     let slice = binding.as_slice();
     let len = tag.len();
     if len == 0 || len > H::get_digest().block_size() {
diff --git a/nearby/crypto/crypto_provider_openssl/src/lib.rs b/nearby/crypto/crypto_provider_openssl/src/lib.rs
index 41c4642..d8157d2 100644
--- a/nearby/crypto/crypto_provider_openssl/src/lib.rs
+++ b/nearby/crypto/crypto_provider_openssl/src/lib.rs
@@ -80,8 +80,8 @@
     type AesCtr128 = aes::OpenSslAesCtr128;
     type AesCtr256 = aes::OpenSslAesCtr256;
     type Ed25519 = ed25519::Ed25519;
-    type Aes128GcmSiv = aes::OpenSslAesGcmSiv128;
-    type Aes256GcmSiv = aes::OpenSslAesGcmSiv256;
+    type Aes128GcmSiv = crypto_provider_stubs::Aes128Stubs;
+    type Aes256GcmSiv = crypto_provider_stubs::Aes256Stubs;
     type CryptoRng = OpenSslRng;
 
     fn constant_time_eq(a: &[u8], b: &[u8]) -> bool {
diff --git a/nearby/crypto/crypto_provider_openssl/src/p256.rs b/nearby/crypto/crypto_provider_openssl/src/p256.rs
index 5efd123..2f5b0b1 100644
--- a/nearby/crypto/crypto_provider_openssl/src/p256.rs
+++ b/nearby/crypto/crypto_provider_openssl/src/p256.rs
@@ -33,11 +33,14 @@
 
 /// Custom error type for OpenSSL operations.
 #[derive(Debug)]
+#[allow(clippy::enum_variant_names)]
 pub enum Error {
     /// Error from the openssl crate.
     OpenSslError(ErrorStack),
     /// Unexpected size for the given input.
     WrongSize,
+    /// Invalid input given when creating keys from their byte representations.
+    InvalidInput,
 }
 
 impl From<ErrorStack> for Error {
@@ -51,6 +54,10 @@
     type Error = Error;
 
     fn from_sec1_bytes(bytes: &[u8]) -> Result<Self, Self::Error> {
+        if bytes == [0] {
+            // Single 0 byte means infinity point.
+            return Err(Error::InvalidInput);
+        }
         let ecgroup = EcGroup::from_curve_name(Nid::X9_62_PRIME256V1)?;
         let mut bncontext = BigNumContext::new()?;
         let ecpoint = EcPoint::from_bytes(&ecgroup, bytes, &mut bncontext)?;
@@ -87,8 +94,16 @@
             .public_key()
             .affine_coordinates_gfp(&ecgroup, &mut p256x, &mut p256y, &mut bnctx)?;
         Ok((
-            p256x.to_vec().try_into().map_err(|_| Error::WrongSize)?,
-            p256y.to_vec().try_into().map_err(|_| Error::WrongSize)?,
+            p256x
+                .to_vec_padded(32)
+                .map_err(|_| Error::WrongSize)?
+                .try_into()
+                .expect("to_vec_padded(32) should always return vec of length 32"),
+            p256y
+                .to_vec_padded(32)
+                .map_err(|_| Error::WrongSize)?
+                .try_into()
+                .expect("to_vec_padded(32) should always return vec of length 32"),
         ))
     }
 }
diff --git a/nearby/crypto/crypto_provider_rustcrypto/Cargo.toml b/nearby/crypto/crypto_provider_rustcrypto/Cargo.toml
index cd4cf4a..e0bf534 100644
--- a/nearby/crypto/crypto_provider_rustcrypto/Cargo.toml
+++ b/nearby/crypto/crypto_provider_rustcrypto/Cargo.toml
@@ -6,7 +6,7 @@
 
 [dependencies]
 aead = "0.5.1"
-aes-gcm-siv = { version = "0.11.1", features = ["aes"], optional = true }
+aes-gcm-siv = { version = "0.11.1", features = ["aes"] }
 crypto_provider.workspace = true
 hmac.workspace = true
 hkdf.workspace = true
@@ -30,7 +30,6 @@
 crypto_provider_rustcrypto = { path = ".", features = ["std"] }
 
 [features]
-default = ["alloc", "gcm_siv", "rand_chacha"]
+default = ["alloc", "rand_chacha"]
 std = ["ed25519-dalek/default", "rand/std", "rand/std_rng", "crypto_provider/std", "crypto_provider/alloc"]
 alloc = ["aead/bytes"]
-gcm_siv = ["crypto_provider/gcm_siv", "dep:aes-gcm-siv"]
diff --git a/nearby/crypto/crypto_provider_rustcrypto/src/aead/aes_gcm_siv.rs b/nearby/crypto/crypto_provider_rustcrypto/src/aead/aes_gcm_siv.rs
new file mode 100644
index 0000000..402c2ed
--- /dev/null
+++ b/nearby/crypto/crypto_provider_rustcrypto/src/aead/aes_gcm_siv.rs
@@ -0,0 +1,85 @@
+// Copyright 2023 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+use aes_gcm_siv::{AeadInPlace, Aes128GcmSiv, Aes256GcmSiv, KeyInit, Nonce};
+extern crate alloc;
+use alloc::vec::Vec;
+use crypto_provider::aead::{Aead, AeadError};
+
+use crypto_provider::aead::aes_gcm_siv::AesGcmSiv;
+use crypto_provider::aes::{Aes128Key, Aes256Key, AesKey};
+
+pub struct AesGcmSiv128(Aes128GcmSiv);
+
+impl AesGcmSiv for AesGcmSiv128 {}
+
+impl Aead for AesGcmSiv128 {
+    const TAG_SIZE: usize = 16;
+    type Nonce = [u8; 12];
+    type Key = Aes128Key;
+
+    fn new(key: &Self::Key) -> Self {
+        Self(Aes128GcmSiv::new(key.as_slice().into()))
+    }
+
+    fn encrypt(&self, msg: &mut Vec<u8>, aad: &[u8], nonce: &[u8; 12]) -> Result<(), AeadError> {
+        self.0.encrypt_in_place(Nonce::from_slice(nonce), aad, msg).map_err(|_| AeadError)
+    }
+
+    fn decrypt(&self, msg: &mut Vec<u8>, aad: &[u8], nonce: &[u8; 12]) -> Result<(), AeadError> {
+        self.0.decrypt_in_place(Nonce::from_slice(nonce), aad, msg).map_err(|_| AeadError)
+    }
+}
+
+pub struct AesGcmSiv256(Aes256GcmSiv);
+
+impl AesGcmSiv for AesGcmSiv256 {}
+
+impl Aead for AesGcmSiv256 {
+    const TAG_SIZE: usize = 16;
+    type Nonce = [u8; 12];
+    type Key = Aes256Key;
+
+    fn new(key: &Self::Key) -> Self {
+        Self(Aes256GcmSiv::new(key.as_slice().into()))
+    }
+
+    fn encrypt(&self, msg: &mut Vec<u8>, aad: &[u8], nonce: &[u8; 12]) -> Result<(), AeadError> {
+        self.0.encrypt_in_place(Nonce::from_slice(nonce), aad, msg).map_err(|_| AeadError)
+    }
+
+    fn decrypt(&self, msg: &mut Vec<u8>, aad: &[u8], nonce: &[u8; 12]) -> Result<(), AeadError> {
+        self.0.decrypt_in_place(Nonce::from_slice(nonce), aad, msg).map_err(|_| AeadError)
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use core::marker::PhantomData;
+
+    use crypto_provider_test::aead::aes_gcm_siv::*;
+    use crypto_provider_test::aes::*;
+
+    use super::*;
+
+    #[apply(aes_128_gcm_siv_test_cases)]
+    fn aes_gcm_siv_128_test(testcase: CryptoProviderTestCase<AesGcmSiv128>) {
+        testcase(PhantomData);
+    }
+
+    #[apply(aes_256_gcm_siv_test_cases)]
+    fn aes_gcm_siv_256_test(testcase: CryptoProviderTestCase<AesGcmSiv256>) {
+        testcase(PhantomData);
+    }
+}
diff --git a/nearby/crypto/crypto_provider_rustcrypto/src/aead/mod.rs b/nearby/crypto/crypto_provider_rustcrypto/src/aead/mod.rs
new file mode 100644
index 0000000..7fc561b
--- /dev/null
+++ b/nearby/crypto/crypto_provider_rustcrypto/src/aead/mod.rs
@@ -0,0 +1,15 @@
+// Copyright 2022 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+pub(crate) mod aes_gcm_siv;
diff --git a/nearby/crypto/crypto_provider_rustcrypto/src/aes/ctr.rs b/nearby/crypto/crypto_provider_rustcrypto/src/aes/ctr.rs
new file mode 100644
index 0000000..85cdac6
--- /dev/null
+++ b/nearby/crypto/crypto_provider_rustcrypto/src/aes/ctr.rs
@@ -0,0 +1,89 @@
+// Copyright 2023 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+use aes::cipher::KeyIvInit;
+use aes::cipher::StreamCipher;
+use crypto_provider::aes::{ctr::NonceAndCounter, AesKey};
+
+/// RustCrypto implementation of AES-CTR 128.
+pub struct AesCtr128 {
+    cipher: ctr::Ctr128BE<aes::Aes128>,
+}
+
+impl crypto_provider::aes::ctr::AesCtr for AesCtr128 {
+    type Key = crypto_provider::aes::Aes128Key;
+
+    fn new(key: &Self::Key, nonce_and_counter: NonceAndCounter) -> Self {
+        Self {
+            cipher: ctr::Ctr128BE::new(
+                key.as_array().into(),
+                &nonce_and_counter.as_block_array().into(),
+            ),
+        }
+    }
+
+    fn encrypt(&mut self, data: &mut [u8]) {
+        self.cipher.apply_keystream(data);
+    }
+
+    fn decrypt(&mut self, data: &mut [u8]) {
+        self.cipher.apply_keystream(data);
+    }
+}
+
+/// RustCrypto implementation of AES-CTR 256.
+pub struct AesCtr256 {
+    cipher: ctr::Ctr128BE<aes::Aes256>,
+}
+
+impl crypto_provider::aes::ctr::AesCtr for AesCtr256 {
+    type Key = crypto_provider::aes::Aes256Key;
+
+    fn new(key: &Self::Key, nonce_and_counter: NonceAndCounter) -> Self {
+        Self {
+            cipher: ctr::Ctr128BE::new(
+                key.as_array().into(),
+                &nonce_and_counter.as_block_array().into(),
+            ),
+        }
+    }
+
+    fn encrypt(&mut self, data: &mut [u8]) {
+        self.cipher.apply_keystream(data);
+    }
+
+    fn decrypt(&mut self, data: &mut [u8]) {
+        self.cipher.apply_keystream(data);
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use core::marker::PhantomData;
+
+    use crypto_provider_test::aes::ctr::*;
+    use crypto_provider_test::aes::*;
+
+    use super::*;
+
+    #[apply(aes_128_ctr_test_cases)]
+    fn aes_128_ctr_test(testcase: CryptoProviderTestCase<AesCtr128>) {
+        testcase(PhantomData);
+    }
+
+    #[apply(aes_256_ctr_test_cases)]
+    fn aes_256_ctr_test(testcase: CryptoProviderTestCase<AesCtr256>) {
+        testcase(PhantomData);
+    }
+}
diff --git a/nearby/crypto/crypto_provider_rustcrypto/src/aes/gcm_siv.rs b/nearby/crypto/crypto_provider_rustcrypto/src/aes/gcm_siv.rs
deleted file mode 100644
index c31e09a..0000000
--- a/nearby/crypto/crypto_provider_rustcrypto/src/aes/gcm_siv.rs
+++ /dev/null
@@ -1,84 +0,0 @@
-// Copyright 2023 Google LLC
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-use aes_gcm_siv::{AeadInPlace, Aes128GcmSiv, Aes256GcmSiv, KeyInit, Nonce};
-extern crate alloc;
-use alloc::vec::Vec;
-
-use crypto_provider::aes::gcm_siv::GcmSivError;
-use crypto_provider::aes::{Aes128Key, Aes256Key, AesKey};
-
-pub struct AesGcmSiv128(Aes128GcmSiv);
-
-impl crypto_provider::aes::gcm_siv::AesGcmSiv for AesGcmSiv128 {
-    type Key = Aes128Key;
-
-    fn new(key: &Self::Key) -> Self {
-        Self(Aes128GcmSiv::new(key.as_slice().into()))
-    }
-
-    fn encrypt(&self, data: &mut Vec<u8>, aad: &[u8], nonce: &[u8]) -> Result<(), GcmSivError> {
-        self.0
-            .encrypt_in_place(Nonce::from_slice(nonce), aad, data)
-            .map_err(|_| GcmSivError::EncryptOutBufferTooSmall)
-    }
-
-    fn decrypt(&self, data: &mut Vec<u8>, aad: &[u8], nonce: &[u8]) -> Result<(), GcmSivError> {
-        self.0
-            .decrypt_in_place(Nonce::from_slice(nonce), aad, data)
-            .map_err(|_| GcmSivError::DecryptTagDoesNotMatch)
-    }
-}
-
-pub struct AesGcmSiv256(Aes256GcmSiv);
-
-impl crypto_provider::aes::gcm_siv::AesGcmSiv for AesGcmSiv256 {
-    type Key = Aes256Key;
-
-    fn new(key: &Self::Key) -> Self {
-        Self(Aes256GcmSiv::new(key.as_slice().into()))
-    }
-
-    fn encrypt(&self, data: &mut Vec<u8>, aad: &[u8], nonce: &[u8]) -> Result<(), GcmSivError> {
-        self.0
-            .encrypt_in_place(Nonce::from_slice(nonce), aad, data)
-            .map_err(|_| GcmSivError::EncryptOutBufferTooSmall)
-    }
-
-    fn decrypt(&self, data: &mut Vec<u8>, aad: &[u8], nonce: &[u8]) -> Result<(), GcmSivError> {
-        self.0
-            .decrypt_in_place(Nonce::from_slice(nonce), aad, data)
-            .map_err(|_| GcmSivError::DecryptTagDoesNotMatch)
-    }
-}
-
-#[cfg(test)]
-mod tests {
-    use core::marker::PhantomData;
-
-    use crypto_provider_test::aes::gcm_siv::*;
-    use crypto_provider_test::aes::*;
-
-    use super::*;
-
-    #[apply(aes_128_gcm_siv_test_cases)]
-    fn aes_gcm_siv_128_test(testcase: CryptoProviderTestCase<AesGcmSiv128>) {
-        testcase(PhantomData);
-    }
-
-    #[apply(aes_256_gcm_siv_test_cases)]
-    fn aes_gcm_siv_256_test(testcase: CryptoProviderTestCase<AesGcmSiv256>) {
-        testcase(PhantomData);
-    }
-}
diff --git a/nearby/crypto/crypto_provider_rustcrypto/src/aes/mod.rs b/nearby/crypto/crypto_provider_rustcrypto/src/aes/mod.rs
index bd37458..c71f2ec 100644
--- a/nearby/crypto/crypto_provider_rustcrypto/src/aes/mod.rs
+++ b/nearby/crypto/crypto_provider_rustcrypto/src/aes/mod.rs
@@ -15,10 +15,7 @@
 //! Implementation of `crypto_provider::aes` types using RustCrypto's `aes`.
 #![forbid(unsafe_code)]
 
-use aes::cipher::{
-    generic_array, BlockDecrypt as _, BlockEncrypt as _, KeyInit as _, KeyIvInit as _,
-    StreamCipher as _,
-};
+use aes::cipher::{generic_array, BlockDecrypt as _, BlockEncrypt as _, KeyInit as _};
 
 use crypto_provider::aes::{
     Aes, Aes128Key, Aes256Key, AesBlock, AesCipher, AesDecryptCipher, AesEncryptCipher, AesKey,
@@ -27,8 +24,8 @@
 /// Module implementing AES-CBC.
 #[cfg(feature = "alloc")]
 pub(crate) mod cbc;
-#[cfg(feature = "gcm_siv")]
-pub(crate) mod gcm_siv;
+
+pub(crate) mod ctr;
 
 /// Rust crypto implementation of AES-128
 pub struct Aes128;
@@ -59,19 +56,13 @@
 
 impl AesEncryptCipher for Aes128Cipher {
     fn encrypt(&self, block: &mut AesBlock) {
-        self.0
-            .encrypt_block(generic_array::GenericArray::from_mut_slice(
-                block.as_mut_slice(),
-            ));
+        self.0.encrypt_block(generic_array::GenericArray::from_mut_slice(block.as_mut_slice()));
     }
 }
 
 impl AesDecryptCipher for Aes128Cipher {
     fn decrypt(&self, block: &mut AesBlock) {
-        self.0
-            .decrypt_block(generic_array::GenericArray::from_mut_slice(
-                block.as_mut_slice(),
-            ))
+        self.0.decrypt_block(generic_array::GenericArray::from_mut_slice(block.as_mut_slice()))
     }
 }
 
@@ -88,86 +79,21 @@
 
 impl AesEncryptCipher for Aes256Cipher {
     fn encrypt(&self, block: &mut AesBlock) {
-        self.0
-            .encrypt_block(generic_array::GenericArray::from_mut_slice(
-                block.as_mut_slice(),
-            ));
+        self.0.encrypt_block(generic_array::GenericArray::from_mut_slice(block.as_mut_slice()));
     }
 }
 
 impl AesDecryptCipher for Aes256Cipher {
     fn decrypt(&self, block: &mut AesBlock) {
-        self.0
-            .decrypt_block(generic_array::GenericArray::from_mut_slice(
-                block.as_mut_slice(),
-            ))
-    }
-}
-
-/// RustCrypto implementation of AES-CTR 128.
-pub struct AesCtr128 {
-    cipher: ctr::Ctr128BE<aes::Aes128>,
-}
-
-impl crypto_provider::aes::ctr::AesCtr for AesCtr128 {
-    type Key = crypto_provider::aes::Aes128Key;
-
-    fn new(key: &Self::Key, iv: [u8; 16]) -> Self {
-        Self {
-            cipher: ctr::Ctr128BE::new(key.as_array().into(), &iv.into()),
-        }
-    }
-
-    fn encrypt(&mut self, data: &mut [u8]) {
-        self.cipher.apply_keystream(data);
-    }
-
-    fn decrypt(&mut self, data: &mut [u8]) {
-        self.cipher.apply_keystream(data);
-    }
-}
-
-/// RustCrypto implementation of AES-CTR 256.
-pub struct AesCtr256 {
-    cipher: ctr::Ctr128BE<aes::Aes256>,
-}
-
-impl crypto_provider::aes::ctr::AesCtr for AesCtr256 {
-    type Key = crypto_provider::aes::Aes256Key;
-
-    fn new(key: &Self::Key, iv: [u8; 16]) -> Self {
-        Self {
-            cipher: ctr::Ctr128BE::new(key.as_array().into(), &iv.into()),
-        }
-    }
-
-    fn encrypt(&mut self, data: &mut [u8]) {
-        self.cipher.apply_keystream(data);
-    }
-
-    fn decrypt(&mut self, data: &mut [u8]) {
-        self.cipher.apply_keystream(data);
+        self.0.decrypt_block(generic_array::GenericArray::from_mut_slice(block.as_mut_slice()))
     }
 }
 
 #[cfg(test)]
 mod tests {
-    use core::marker::PhantomData;
-
-    use crypto_provider_test::aes::ctr::*;
-    use crypto_provider_test::aes::*;
-
     use super::*;
-
-    #[apply(aes_128_ctr_test_cases)]
-    fn aes_128_ctr_test(testcase: CryptoProviderTestCase<AesCtr128>) {
-        testcase(PhantomData);
-    }
-
-    #[apply(aes_256_ctr_test_cases)]
-    fn aes_256_ctr_test(testcase: CryptoProviderTestCase<AesCtr256>) {
-        testcase(PhantomData);
-    }
+    use core::marker::PhantomData;
+    use crypto_provider_test::aes::*;
 
     #[apply(aes_128_encrypt_test_cases)]
     fn aes_128_encrypt_test(testcase: CryptoProviderTestCase<Aes128Cipher>) {
diff --git a/nearby/crypto/crypto_provider_rustcrypto/src/ed25519.rs b/nearby/crypto/crypto_provider_rustcrypto/src/ed25519.rs
index b971268..d11a5ea 100644
--- a/nearby/crypto/crypto_provider_rustcrypto/src/ed25519.rs
+++ b/nearby/crypto/crypto_provider_rustcrypto/src/ed25519.rs
@@ -15,8 +15,8 @@
 use ed25519_dalek::Signer;
 
 use crypto_provider::ed25519::{
-    InvalidBytes, InvalidSignature, Signature as _, SignatureError, KEY_LENGTH, KEY_PAIR_LENGTH,
-    SIGNATURE_LENGTH,
+    InvalidBytes, RawPrivateKey, RawPublicKey, RawSignature, Signature as _, SignatureError,
+    PRIVATE_KEY_LENGTH, PUBLIC_KEY_LENGTH, SIGNATURE_LENGTH,
 };
 
 pub struct Ed25519;
@@ -33,20 +33,17 @@
     type PublicKey = PublicKey;
     type Signature = Signature;
 
-    fn to_bytes(&self) -> [u8; KEY_PAIR_LENGTH] {
-        self.0.to_keypair_bytes()
+    fn private_key(&self) -> [u8; PRIVATE_KEY_LENGTH] {
+        self.0.to_bytes()
     }
 
-    fn from_bytes(bytes: [u8; KEY_PAIR_LENGTH]) -> Result<Self, InvalidBytes> {
-        ed25519_dalek::SigningKey::from_keypair_bytes(&bytes)
-            .map(Self)
-            .map_err(|_| InvalidBytes)
+    fn from_private_key(bytes: &RawPrivateKey) -> Self {
+        Self(ed25519_dalek::SigningKey::from_bytes(bytes))
     }
 
     #[allow(clippy::expect_used)]
     fn sign(&self, msg: &[u8]) -> Self::Signature {
         Self::Signature::from_bytes(&self.0.sign(msg).to_bytes())
-            .expect("a signature will always produce valid bytes for creating a Signature")
     }
 
     //TODO: allow providing a crypto rng and make it a no-op for openssl if the need arises to
@@ -65,13 +62,8 @@
 pub struct Signature(ed25519_dalek::Signature);
 
 impl crypto_provider::ed25519::Signature for Signature {
-    fn from_bytes(bytes: &[u8]) -> Result<Self, InvalidSignature> {
-        if bytes.len() != SIGNATURE_LENGTH {
-            return Err(InvalidSignature);
-        }
-        ed25519_dalek::Signature::from_slice(bytes)
-            .map(Self)
-            .map_err(|_| InvalidSignature)
+    fn from_bytes(bytes: &RawSignature) -> Self {
+        Self(ed25519_dalek::Signature::from_bytes(bytes))
     }
 
     fn to_bytes(&self) -> [u8; SIGNATURE_LENGTH] {
@@ -84,16 +76,14 @@
 impl crypto_provider::ed25519::PublicKey for PublicKey {
     type Signature = Signature;
 
-    fn from_bytes(bytes: [u8; KEY_LENGTH]) -> Result<Self, InvalidBytes>
+    fn from_bytes(bytes: &RawPublicKey) -> Result<Self, InvalidBytes>
     where
         Self: Sized,
     {
-        ed25519_dalek::VerifyingKey::from_bytes(&bytes)
-            .map(PublicKey)
-            .map_err(|_| InvalidBytes)
+        ed25519_dalek::VerifyingKey::from_bytes(bytes).map(PublicKey).map_err(|_| InvalidBytes)
     }
 
-    fn to_bytes(&self) -> [u8; KEY_LENGTH] {
+    fn to_bytes(&self) -> [u8; PUBLIC_KEY_LENGTH] {
         self.0.to_bytes()
     }
 
@@ -102,9 +92,7 @@
         message: &[u8],
         signature: &Self::Signature,
     ) -> Result<(), SignatureError> {
-        self.0
-            .verify_strict(message, &signature.0)
-            .map_err(|_| SignatureError)
+        self.0.verify_strict(message, &signature.0).map_err(|_| SignatureError)
     }
 }
 
diff --git a/nearby/crypto/crypto_provider_rustcrypto/src/hkdf_rc.rs b/nearby/crypto/crypto_provider_rustcrypto/src/hkdf_rc.rs
index 79379e2..aba0d4a 100644
--- a/nearby/crypto/crypto_provider_rustcrypto/src/hkdf_rc.rs
+++ b/nearby/crypto/crypto_provider_rustcrypto/src/hkdf_rc.rs
@@ -52,9 +52,7 @@
     Le<<D::Core as BlockSizeUser>::BlockSize, U256>: NonZero,
 {
     fn new(salt: Option<&[u8]>, ikm: &[u8]) -> Self {
-        Hkdf {
-            hkdf_impl: hkdf::Hkdf::new(salt, ikm),
-        }
+        Hkdf { hkdf_impl: hkdf::Hkdf::new(salt, ikm) }
     }
 
     fn expand_multi_info(
@@ -62,9 +60,7 @@
         info_components: &[&[u8]],
         okm: &mut [u8],
     ) -> Result<(), InvalidLength> {
-        self.hkdf_impl
-            .expand_multi_info(info_components, okm)
-            .map_err(|_| InvalidLength)
+        self.hkdf_impl.expand_multi_info(info_components, okm).map_err(|_| InvalidLength)
     }
 
     fn expand(&self, info: &[u8], okm: &mut [u8]) -> Result<(), InvalidLength> {
diff --git a/nearby/crypto/crypto_provider_rustcrypto/src/hmac_rc.rs b/nearby/crypto/crypto_provider_rustcrypto/src/hmac_rc.rs
index 6eb678c..dfda208 100644
--- a/nearby/crypto/crypto_provider_rustcrypto/src/hmac_rc.rs
+++ b/nearby/crypto/crypto_provider_rustcrypto/src/hmac_rc.rs
@@ -70,9 +70,7 @@
     }
 
     fn verify_truncated_left(self, tag: &[u8]) -> Result<(), MacError> {
-        self.hmac_impl
-            .verify_truncated_left(tag)
-            .map_err(|_| MacError)
+        self.hmac_impl.verify_truncated_left(tag).map_err(|_| MacError)
     }
 }
 
@@ -107,9 +105,7 @@
     }
 
     fn verify_truncated_left(self, tag: &[u8]) -> Result<(), MacError> {
-        self.hmac_impl
-            .verify_truncated_left(tag)
-            .map_err(|_| MacError)
+        self.hmac_impl.verify_truncated_left(tag).map_err(|_| MacError)
     }
 }
 
diff --git a/nearby/crypto/crypto_provider_rustcrypto/src/lib.rs b/nearby/crypto/crypto_provider_rustcrypto/src/lib.rs
index 7d4a3b4..e95712c 100644
--- a/nearby/crypto/crypto_provider_rustcrypto/src/lib.rs
+++ b/nearby/crypto/crypto_provider_rustcrypto/src/lib.rs
@@ -32,6 +32,8 @@
 use rand_core::CryptoRng;
 use subtle::ConstantTimeEq;
 
+/// Contains the RustCrypto backed impls for AES-GCM-SIV operations
+mod aead;
 /// Contains the RustCrypto backed AES impl for CryptoProvider
 pub mod aes;
 /// Contains the RustCrypto backed impl for ed25519 key generation, signing, and verification
@@ -67,9 +69,7 @@
 impl<R: CryptoRng + SeedableRng + RngCore> RustCryptoImpl<R> {
     /// Create a new instance of RustCrypto
     pub fn new() -> Self {
-        Self {
-            _marker: Default::default(),
-        }
+        Self { _marker: Default::default() }
     }
 }
 
@@ -88,13 +88,11 @@
     type Sha512 = sha2_rc::RustCryptoSha512;
     type Aes128 = aes::Aes128;
     type Aes256 = aes::Aes256;
-    type AesCtr128 = aes::AesCtr128;
-    type AesCtr256 = aes::AesCtr256;
+    type AesCtr128 = aes::ctr::AesCtr128;
+    type AesCtr256 = aes::ctr::AesCtr256;
     type Ed25519 = ed25519::Ed25519;
-    #[cfg(feature = "gcm_siv")]
-    type Aes128GcmSiv = aes::gcm_siv::AesGcmSiv128;
-    #[cfg(feature = "gcm_siv")]
-    type Aes256GcmSiv = aes::gcm_siv::AesGcmSiv256;
+    type Aes128GcmSiv = aead::aes_gcm_siv::AesGcmSiv128;
+    type Aes256GcmSiv = aead::aes_gcm_siv::AesGcmSiv256;
     type CryptoRng = RcRng<R>;
 
     fn constant_time_eq(a: &[u8], b: &[u8]) -> bool {
diff --git a/nearby/crypto/crypto_provider_rustcrypto/src/p256.rs b/nearby/crypto/crypto_provider_rustcrypto/src/p256.rs
index 3ad08f2..539ccc0 100644
--- a/nearby/crypto/crypto_provider_rustcrypto/src/p256.rs
+++ b/nearby/crypto/crypto_provider_rustcrypto/src/p256.rs
@@ -59,14 +59,10 @@
     #[allow(clippy::expect_used)]
     fn to_affine_coordinates(&self) -> Result<([u8; 32], [u8; 32]), Self::Error> {
         let p256_key = self.0.to_encoded_point(false);
-        let x: &[u8; 32] = p256_key
-            .x()
-            .expect("Generated key should not be on identity point")
-            .as_ref();
-        let y: &[u8; 32] = p256_key
-            .y()
-            .expect("Generated key should not be on identity point")
-            .as_ref();
+        let x: &[u8; 32] =
+            p256_key.x().expect("Generated key should not be on identity point").as_ref();
+        let y: &[u8; 32] =
+            p256_key.y().expect("Generated key should not be on identity point").as_ref();
         Ok((*x, *y))
     }
     fn from_affine_coordinates(x: &[u8; 32], y: &[u8; 32]) -> Result<Self, Self::Error> {
@@ -100,11 +96,7 @@
     }
 
     fn public_key_bytes(&self) -> Vec<u8> {
-        self.secret
-            .public_key()
-            .to_encoded_point(false)
-            .as_bytes()
-            .into()
+        self.secret.public_key().to_encoded_point(false).as_bytes().into()
     }
 
     fn diffie_hellman(
diff --git a/nearby/crypto/crypto_provider_rustcrypto/src/testing.rs b/nearby/crypto/crypto_provider_rustcrypto/src/testing.rs
index f606492..2106708 100644
--- a/nearby/crypto/crypto_provider_rustcrypto/src/testing.rs
+++ b/nearby/crypto/crypto_provider_rustcrypto/src/testing.rs
@@ -25,10 +25,7 @@
 impl<'a, I: Iterator<Item = &'a u8>> rand::RngCore for MockCryptoRng<'a, I> {
     fn fill_bytes(&mut self, dest: &mut [u8]) {
         for i in dest {
-            *i = *self
-                .values
-                .next()
-                .expect("Expecting more data in MockCryptoRng input");
+            *i = *self.values.next().expect("Expecting more data in MockCryptoRng input");
         }
     }
 
diff --git a/nearby/crypto/crypto_provider_rustcrypto/src/x25519.rs b/nearby/crypto/crypto_provider_rustcrypto/src/x25519.rs
index 60d9bdb..445e858 100644
--- a/nearby/crypto/crypto_provider_rustcrypto/src/x25519.rs
+++ b/nearby/crypto/crypto_provider_rustcrypto/src/x25519.rs
@@ -76,11 +76,9 @@
         _public_key: &X25519PublicKey,
     ) -> Result<Self, Self::Error> {
         Ok(Self {
-            secret: x25519_dalek::EphemeralSecret::random_from_rng(
-                &mut crate::testing::MockCryptoRng {
-                    values: private_bytes.iter(),
-                },
-            ),
+            secret: x25519_dalek::EphemeralSecret::random_from_rng(crate::testing::MockCryptoRng {
+                values: private_bytes.iter(),
+            }),
             marker: Default::default(),
         })
     }
diff --git a/nearby/crypto/crypto_provider_stubs/src/lib.rs b/nearby/crypto/crypto_provider_stubs/src/lib.rs
index fcfec39..5d54b72 100644
--- a/nearby/crypto/crypto_provider_stubs/src/lib.rs
+++ b/nearby/crypto/crypto_provider_stubs/src/lib.rs
@@ -20,22 +20,23 @@
 
 use std::fmt::Debug;
 
-use crypto_provider::aes::cbc::{AesCbcIv, AesCbcPkcs7Padded, DecryptionError};
-use crypto_provider::aes::ctr::AesCtr;
-use crypto_provider::aes::gcm_siv::{AesGcmSiv, GcmSivError};
-use crypto_provider::aes::{
-    Aes, Aes128Key, Aes256Key, AesBlock, AesCipher, AesDecryptCipher, AesEncryptCipher,
+use crypto_provider::ed25519::{RawPrivateKey, RawPublicKey, RawSignature};
+use crypto_provider::{
+    aead::aes_gcm_siv::AesGcmSiv,
+    aead::{Aead, AeadError},
+    aes::{
+        cbc::{AesCbcIv, AesCbcPkcs7Padded, DecryptionError},
+        ctr::{AesCtr, NonceAndCounter},
+        Aes, Aes128Key, Aes256Key, AesBlock, AesCipher, AesDecryptCipher, AesEncryptCipher,
+    },
+    ed25519,
+    ed25519::{Ed25519Provider, InvalidBytes, KeyPair, Signature, SignatureError},
+    elliptic_curve::{EcdhProvider, EphemeralSecret, PublicKey},
+    hkdf::{Hkdf, InvalidLength},
+    hmac::{Hmac, MacError},
+    p256::{P256PublicKey, P256},
+    x25519::X25519,
 };
-use crypto_provider::ed25519;
-use crypto_provider::ed25519::{
-    Ed25519Provider, InvalidBytes, InvalidSignature, KeyPair, Signature, SignatureError,
-    KEY_LENGTH, KEY_PAIR_LENGTH, SIGNATURE_LENGTH,
-};
-use crypto_provider::elliptic_curve::{EcdhProvider, EphemeralSecret, PublicKey};
-use crypto_provider::hkdf::{Hkdf, InvalidLength};
-use crypto_provider::hmac::{Hmac, MacError};
-use crypto_provider::p256::{P256PublicKey, P256};
-use crypto_provider::x25519::X25519;
 
 #[derive(Default, Clone, Debug, PartialEq, Eq)]
 pub struct CryptoProviderStubs;
@@ -316,7 +317,7 @@
 impl AesCtr for Aes128Stubs {
     type Key = Aes128Key;
 
-    fn new(_key: &Self::Key, _iv: [u8; 16]) -> Self {
+    fn new(_key: &Self::Key, _nonce_and_counter: NonceAndCounter) -> Self {
         unimplemented!()
     }
 
@@ -329,22 +330,26 @@
     }
 }
 
-impl AesGcmSiv for Aes128Stubs {
+impl Aead for Aes128Stubs {
+    const TAG_SIZE: usize = 16;
+    type Nonce = [u8; 12];
     type Key = Aes128Key;
 
     fn new(key: &Self::Key) -> Self {
         unimplemented!()
     }
 
-    fn encrypt(&self, data: &mut Vec<u8>, aad: &[u8], nonce: &[u8]) -> Result<(), GcmSivError> {
+    fn encrypt(&self, msg: &mut Vec<u8>, aad: &[u8], nonce: &[u8; 12]) -> Result<(), AeadError> {
         unimplemented!()
     }
 
-    fn decrypt(&self, data: &mut Vec<u8>, aad: &[u8], nonce: &[u8]) -> Result<(), GcmSivError> {
+    fn decrypt(&self, msg: &mut Vec<u8>, aad: &[u8], nonce: &[u8; 12]) -> Result<(), AeadError> {
         unimplemented!()
     }
 }
 
+impl AesGcmSiv for Aes128Stubs {}
+
 pub struct Aes256Stubs;
 
 impl AesCipher for Aes256Stubs {
@@ -370,7 +375,7 @@
 impl AesCtr for Aes256Stubs {
     type Key = Aes256Key;
 
-    fn new(_key: &Self::Key, _iv: [u8; 16]) -> Self {
+    fn new(_key: &Self::Key, _nonce_and_counter: NonceAndCounter) -> Self {
         unimplemented!()
     }
 
@@ -383,22 +388,26 @@
     }
 }
 
-impl AesGcmSiv for Aes256Stubs {
+impl Aead for Aes256Stubs {
+    const TAG_SIZE: usize = 16;
+    type Nonce = [u8; 12];
     type Key = Aes256Key;
 
     fn new(key: &Self::Key) -> Self {
         unimplemented!()
     }
 
-    fn encrypt(&self, data: &mut Vec<u8>, aad: &[u8], nonce: &[u8]) -> Result<(), GcmSivError> {
+    fn encrypt(&self, msg: &mut Vec<u8>, aad: &[u8], nonce: &[u8; 12]) -> Result<(), AeadError> {
         unimplemented!()
     }
 
-    fn decrypt(&self, data: &mut Vec<u8>, aad: &[u8], nonce: &[u8]) -> Result<(), GcmSivError> {
+    fn decrypt(&self, msg: &mut Vec<u8>, aad: &[u8], nonce: &[u8; 12]) -> Result<(), AeadError> {
         unimplemented!()
     }
 }
 
+impl AesGcmSiv for Aes256Stubs {}
+
 pub struct Ed25519Stubs;
 
 impl Ed25519Provider for Ed25519Stubs {
@@ -410,14 +419,14 @@
 impl ed25519::PublicKey for PublicKeyStubs {
     type Signature = SignatureStubs;
 
-    fn from_bytes(bytes: [u8; KEY_LENGTH]) -> Result<Self, InvalidBytes>
+    fn from_bytes(bytes: &RawPublicKey) -> Result<Self, InvalidBytes>
     where
         Self: Sized,
     {
         unimplemented!()
     }
 
-    fn to_bytes(&self) -> [u8; KEY_LENGTH] {
+    fn to_bytes(&self) -> RawPublicKey {
         unimplemented!()
     }
 
@@ -433,11 +442,11 @@
 pub struct SignatureStubs;
 
 impl Signature for SignatureStubs {
-    fn from_bytes(_bytes: &[u8]) -> Result<Self, InvalidSignature> {
+    fn from_bytes(_bytes: &RawSignature) -> Self {
         unimplemented!()
     }
 
-    fn to_bytes(&self) -> [u8; SIGNATURE_LENGTH] {
+    fn to_bytes(&self) -> RawSignature {
         unimplemented!()
     }
 }
@@ -448,15 +457,11 @@
     type PublicKey = PublicKeyStubs;
     type Signature = SignatureStubs;
 
-    fn generate() -> Self {
+    fn private_key(&self) -> RawPrivateKey {
         unimplemented!()
     }
 
-    fn to_bytes(&self) -> [u8; KEY_PAIR_LENGTH] {
-        unimplemented!()
-    }
-
-    fn from_bytes(_bytes: [u8; KEY_PAIR_LENGTH]) -> Result<Self, InvalidBytes>
+    fn from_private_key(_bytes: &RawPrivateKey) -> Self
     where
         Self: Sized,
     {
@@ -467,6 +472,10 @@
         unimplemented!()
     }
 
+    fn generate() -> Self {
+        unimplemented!()
+    }
+
     fn public(&self) -> Self::PublicKey {
         unimplemented!()
     }
diff --git a/nearby/crypto/crypto_provider_test/Cargo.toml b/nearby/crypto/crypto_provider_test/Cargo.toml
index 1f58c84..a4d92ec 100644
--- a/nearby/crypto/crypto_provider_test/Cargo.toml
+++ b/nearby/crypto/crypto_provider_test/Cargo.toml
@@ -5,7 +5,7 @@
 publish.workspace = true
 
 [dependencies]
-crypto_provider.workspace = true
+crypto_provider = {  workspace = true, features = ["test_vectors"] }
 rand_ext.workspace = true
 test_helper.workspace = true
 
diff --git a/nearby/crypto/crypto_provider_test/fuzz/.gitignore b/nearby/crypto/crypto_provider_test/fuzz/.gitignore
new file mode 100644
index 0000000..b7fa0a7
--- /dev/null
+++ b/nearby/crypto/crypto_provider_test/fuzz/.gitignore
@@ -0,0 +1,4 @@
+/target
+/corpus
+/artifacts
+/coverage
diff --git a/nearby/crypto/crypto_provider_test/fuzz/Cargo.lock b/nearby/crypto/crypto_provider_test/fuzz/Cargo.lock
new file mode 100644
index 0000000..f65c18d
--- /dev/null
+++ b/nearby/crypto/crypto_provider_test/fuzz/Cargo.lock
@@ -0,0 +1,770 @@
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+
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+ "cpufeatures",
+ "opaque-debug",
+ "universal-hash",
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+ "unicode-ident",
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+dependencies = [
+ "curve25519-dalek",
+ "rand_core",
+]
+
+[[package]]
+name = "zeroize"
+version = "1.6.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
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diff --git a/nearby/crypto/crypto_provider_test/fuzz/Cargo.toml b/nearby/crypto/crypto_provider_test/fuzz/Cargo.toml
new file mode 100644
index 0000000..68fad3e
--- /dev/null
+++ b/nearby/crypto/crypto_provider_test/fuzz/Cargo.toml
@@ -0,0 +1,31 @@
+[package]
+name = "crypto_provider_test-fuzz"
+version = "0.0.0"
+publish = false
+edition = "2021"
+
+[package.metadata]
+cargo-fuzz = true
+
+[dependencies]
+libfuzzer-sys = "0.4"
+crypto_provider = { path = "../../crypto_provider" }
+crypto_provider_default = { path = "../../crypto_provider_default", default-features = false }
+arbitrary = { version = "1.2.3", features = ["derive"] }
+
+[features]
+default = ["crypto_provider_default/default"]
+openssl = ["crypto_provider_default/openssl"]
+
+# Prevent this from interfering with workspaces
+[workspace]
+members = ["."]
+
+[profile.release]
+debug = 1
+
+[[bin]]
+name = "fuzz_p256"
+path = "fuzz_targets/fuzz_p256.rs"
+test = false
+doc = false
diff --git a/nearby/crypto/crypto_provider_test/fuzz/fuzz_targets/fuzz_p256.rs b/nearby/crypto/crypto_provider_test/fuzz/fuzz_targets/fuzz_p256.rs
new file mode 100644
index 0000000..00a0624
--- /dev/null
+++ b/nearby/crypto/crypto_provider_test/fuzz/fuzz_targets/fuzz_p256.rs
@@ -0,0 +1,43 @@
+#![no_main]
+// Copyright 2023 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+use arbitrary::Arbitrary;
+use crypto_provider::{
+    elliptic_curve::EcdhProvider,
+    p256::{P256PublicKey, P256},
+    CryptoProvider,
+};
+use crypto_provider_default::CryptoProviderImpl;
+use libfuzzer_sys::fuzz_target;
+
+#[derive(Debug, Arbitrary)]
+struct FuzzInput {
+    bytes: Vec<u8>,
+}
+
+type P256PublicKeyAlias<P> = <<P as CryptoProvider>::P256 as EcdhProvider<P256>>::PublicKey;
+
+fuzz_target!(|input: FuzzInput| {
+    let pubkey = P256PublicKeyAlias::<CryptoProviderImpl>::from_sec1_bytes(&input.bytes);
+    if let Ok(key) = pubkey {
+        let (x, y) = key
+            .to_affine_coordinates()
+            .expect("Valid keys should always be able to output affine coordinates");
+        let recreated_pubkey =
+            P256PublicKeyAlias::<CryptoProviderImpl>::from_affine_coordinates(&x, &y)
+                .expect("Creating public key from affine coordinates should succeed");
+        assert_eq!(key, recreated_pubkey);
+    }
+});
diff --git a/nearby/crypto/crypto_provider_test/src/aes/gcm_siv.rs b/nearby/crypto/crypto_provider_test/src/aead/aes_gcm_siv.rs
similarity index 92%
rename from nearby/crypto/crypto_provider_test/src/aes/gcm_siv.rs
rename to nearby/crypto/crypto_provider_test/src/aead/aes_gcm_siv.rs
index b27e61c..893fba2 100644
--- a/nearby/crypto/crypto_provider_test/src/aes/gcm_siv.rs
+++ b/nearby/crypto/crypto_provider_test/src/aead/aes_gcm_siv.rs
@@ -17,10 +17,10 @@
 use hex_literal::hex;
 use rstest_reuse::template;
 
-use crate::aes::{Aes128Key, Aes256Key};
 pub use crate::prelude;
+use crypto_provider::aes::{Aes128Key, Aes256Key};
 
-use crypto_provider::aes::gcm_siv::AesGcmSiv;
+use crypto_provider::aead::aes_gcm_siv::AesGcmSiv;
 
 /// Test AES-GCM-SIV-128 encryption/decryption
 pub fn aes_128_gcm_siv_test<A: AesGcmSiv<Key = Aes128Key>>(_marker: marker::PhantomData<A>) {
@@ -42,6 +42,7 @@
     assert!(aes.encrypt(&mut buf, b"", &nonce).is_ok());
     assert_eq!(&buf[..8], &ct);
     assert_eq!(&buf[8..], &tag);
+    assert_eq!(A::TAG_SIZE, buf[8..].len());
     assert!(aes.decrypt(&mut buf, b"", &nonce).is_ok());
     assert_eq!(&buf[..], &msg);
 }
@@ -61,6 +62,7 @@
     assert!(aes.encrypt(&mut buf, b"", &nonce).is_ok());
     assert_eq!(&buf[..8], &ct);
     assert_eq!(&buf[8..], &tag);
+    assert_eq!(A::TAG_SIZE, buf[8..].len());
     assert!(aes.decrypt(&mut buf, b"", &nonce).is_ok());
     assert_eq!(&buf[..], &msg);
     // TC78
@@ -79,7 +81,7 @@
 /// For example, to test `MyAesGcmSiv128Impl`:
 ///
 /// ```
-/// use crypto_provider::aes::gcm_siv::testing::*;
+/// use crypto_provider::aes::aes_gcm_siv::testing::*;
 ///
 /// mod tests {
 ///     #[apply(aes_128_gcm_siv_test_cases)]
@@ -102,7 +104,7 @@
 /// For example, to test `MyAesGcmSiv256Impl`:
 ///
 /// ```
-/// use crypto_provider::aes::gcm_siv::testing::*;
+/// use crypto_provider::aes::aes_gcm_siv::testing::*;
 ///
 /// mod tests {
 ///     #[apply(aes_256_gcm_siv_test_cases)]
diff --git a/nearby/crypto/crypto_provider_test/src/aead/mod.rs b/nearby/crypto/crypto_provider_test/src/aead/mod.rs
new file mode 100644
index 0000000..962aa49
--- /dev/null
+++ b/nearby/crypto/crypto_provider_test/src/aead/mod.rs
@@ -0,0 +1,16 @@
+// Copyright 2023 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+/// Contains test cases for aes_gcm_siv implementations.
+pub mod aes_gcm_siv;
diff --git a/nearby/crypto/crypto_provider_test/src/aes/ctr.rs b/nearby/crypto/crypto_provider_test/src/aes/ctr.rs
index 401f65b..b1d6b8b 100644
--- a/nearby/crypto/crypto_provider_test/src/aes/ctr.rs
+++ b/nearby/crypto/crypto_provider_test/src/aes/ctr.rs
@@ -14,7 +14,7 @@
 use crate::aes::{Aes128Key, Aes256Key};
 pub use crate::prelude;
 use core::marker;
-use crypto_provider::aes::ctr::AesCtr;
+use crypto_provider::aes::ctr::{AesCtr, NonceAndCounter};
 use hex_literal::hex;
 use rstest_reuse::template;
 
@@ -24,7 +24,7 @@
     let key: Aes128Key = hex!("2b7e151628aed2a6abf7158809cf4f3c").into();
     let iv = hex!("f0f1f2f3f4f5f6f7f8f9fafbfcfdfeff");
     let mut block: [u8; 16];
-    let mut cipher = A::new(&key, iv);
+    let mut cipher = A::new(&key, NonceAndCounter::from_block(iv));
 
     block = hex!("6bc1bee22e409f96e93d7e117393172a");
     cipher.encrypt(&mut block);
@@ -53,25 +53,25 @@
     let key: Aes128Key = hex!("2b7e151628aed2a6abf7158809cf4f3c").into();
     let iv = hex!("f0f1f2f3f4f5f6f7f8f9fafbfcfdfeff");
     let mut block: [u8; 16];
-    let mut cipher = A::new(&key, iv);
+    let mut cipher = A::new(&key, NonceAndCounter::from_block(iv));
 
     block = hex!("874d6191b620e3261bef6864990db6ce");
-    cipher.encrypt(&mut block);
+    cipher.decrypt(&mut block);
     let expected_plaintext_1 = hex!("6bc1bee22e409f96e93d7e117393172a");
     assert_eq!(expected_plaintext_1, block);
 
     block = hex!("9806f66b7970fdff8617187bb9fffdff");
-    cipher.encrypt(&mut block);
+    cipher.decrypt(&mut block);
     let expected_plaintext_2 = hex!("ae2d8a571e03ac9c9eb76fac45af8e51");
     assert_eq!(expected_plaintext_2, block);
 
     block = hex!("5ae4df3edbd5d35e5b4f09020db03eab");
-    cipher.encrypt(&mut block);
+    cipher.decrypt(&mut block);
     let expected_plaintext_3 = hex!("30c81c46a35ce411e5fbc1191a0a52ef");
     assert_eq!(expected_plaintext_3, block);
 
     block = hex!("1e031dda2fbe03d1792170a0f3009cee");
-    cipher.encrypt(&mut block);
+    cipher.decrypt(&mut block);
     let expected_plaintext_3 = hex!("f69f2445df4f9b17ad2b417be66c3710");
     assert_eq!(expected_plaintext_3, block);
 }
@@ -83,7 +83,7 @@
         hex!("603deb1015ca71be2b73aef0857d77811f352c073b6108d72d9810a30914dff4").into();
     let iv = hex!("f0f1f2f3f4f5f6f7f8f9fafbfcfdfeff");
     let mut block: [u8; 16];
-    let mut cipher = A::new(&key, iv);
+    let mut cipher = A::new(&key, NonceAndCounter::from_block(iv));
 
     block = hex!("6bc1bee22e409f96e93d7e117393172a");
     cipher.encrypt(&mut block);
@@ -113,25 +113,25 @@
         hex!("603deb1015ca71be2b73aef0857d77811f352c073b6108d72d9810a30914dff4").into();
     let iv = hex!("f0f1f2f3f4f5f6f7f8f9fafbfcfdfeff");
     let mut block: [u8; 16];
-    let mut cipher = A::new(&key, iv);
+    let mut cipher = A::new(&key, NonceAndCounter::from_block(iv));
 
     block = hex!("601ec313775789a5b7a7f504bbf3d228");
-    cipher.encrypt(&mut block);
+    cipher.decrypt(&mut block);
     let expected_plaintext_1 = hex!("6bc1bee22e409f96e93d7e117393172a");
     assert_eq!(expected_plaintext_1, block);
 
     block = hex!("f443e3ca4d62b59aca84e990cacaf5c5");
-    cipher.encrypt(&mut block);
+    cipher.decrypt(&mut block);
     let expected_plaintext_2 = hex!("ae2d8a571e03ac9c9eb76fac45af8e51");
     assert_eq!(expected_plaintext_2, block);
 
     block = hex!("2b0930daa23de94ce87017ba2d84988d");
-    cipher.encrypt(&mut block);
+    cipher.decrypt(&mut block);
     let expected_plaintext_3 = hex!("30c81c46a35ce411e5fbc1191a0a52ef");
     assert_eq!(expected_plaintext_3, block);
 
     block = hex!("dfc9c58db67aada613c2dd08457941a6");
-    cipher.encrypt(&mut block);
+    cipher.decrypt(&mut block);
     let expected_plaintext_3 = hex!("f69f2445df4f9b17ad2b417be66c3710");
     assert_eq!(expected_plaintext_3, block);
 }
diff --git a/nearby/crypto/crypto_provider_test/src/aes/mod.rs b/nearby/crypto/crypto_provider_test/src/aes/mod.rs
index e1489da..d955f91 100644
--- a/nearby/crypto/crypto_provider_test/src/aes/mod.rs
+++ b/nearby/crypto/crypto_provider_test/src/aes/mod.rs
@@ -14,7 +14,6 @@
 
 pub mod cbc;
 pub mod ctr;
-pub mod gcm_siv;
 
 pub use crate::prelude::*;
 
diff --git a/nearby/crypto/crypto_provider_test/src/ed25519.rs b/nearby/crypto/crypto_provider_test/src/ed25519.rs
index c2da3b3..d99605c 100644
--- a/nearby/crypto/crypto_provider_test/src/ed25519.rs
+++ b/nearby/crypto/crypto_provider_test/src/ed25519.rs
@@ -53,12 +53,8 @@
                 TestResult::Invalid => false,
                 TestResult::Valid | TestResult::Acceptable => true,
             };
-            let result = run_test::<E>(
-                public_key.clone(),
-                secret_key.clone(),
-                sig.clone(),
-                msg.clone(),
-            );
+            let result =
+                run_test::<E>(public_key.clone(), secret_key.clone(), sig.clone(), msg.clone());
             if valid {
                 if let Err(desc) = result {
                     panic!(
@@ -120,32 +116,27 @@
 }
 
 fn run_test<E>(
-    pub_key: Vec<u8>,
-    secret_key: Vec<u8>,
+    expected_pub_key: Vec<u8>,
+    private_key: Vec<u8>,
     sig: Vec<u8>,
     msg: Vec<u8>,
 ) -> Result<(), &'static str>
 where
     E: Ed25519Provider,
 {
-    let kp_bytes: [u8; 64] = [secret_key.as_slice(), pub_key.as_slice()]
-        .concat()
-        .try_into()
-        .map_err(|_| "invalid length keypair")?;
-    let kp = E::KeyPair::from_bytes(kp_bytes)
-        .map_err(|_| "Should be able to create Keypair from bytes")?;
+    let private_key_bytes: [u8; 32] =
+        private_key.as_slice().try_into().expect("Secret key is the wrong length");
+    let kp = E::KeyPair::from_private_key(&private_key_bytes);
 
     let sig_result = kp.sign(msg.as_slice());
-    (sig.as_slice() == sig_result.to_bytes())
-        .then_some(())
-        .ok_or("sig not matching expected")?;
-    let signature = E::Signature::from_bytes(sig.as_slice())
-        .map_err(|_| "unable to parse sign from test case")?;
+    (sig.as_slice() == sig_result.to_bytes()).then_some(()).ok_or("sig not matching expected")?;
+    let signature = E::Signature::from_bytes(
+        sig.as_slice().try_into().expect("Test signature should be the correct length"),
+    );
 
     let pub_key = kp.public();
-    pub_key
-        .verify_strict(msg.as_slice(), &signature)
-        .map_err(|_| "verify failed")?;
+    assert_eq!(pub_key.to_bytes().as_slice(), expected_pub_key.as_slice());
+    pub_key.verify_strict(msg.as_slice(), &signature).map_err(|_| "verify failed")?;
 
     Ok(())
 }
diff --git a/nearby/crypto/crypto_provider_test/src/hkdf.rs b/nearby/crypto/crypto_provider_test/src/hkdf.rs
index 5780263..d664230 100644
--- a/nearby/crypto/crypto_provider_test/src/hkdf.rs
+++ b/nearby/crypto/crypto_provider_test/src/hkdf.rs
@@ -67,8 +67,7 @@
 
     let hk = C::HkdfSha256::new(Some(&salt[..]), &ikm);
     let mut okm = [0u8; 42];
-    hk.expand(&info, &mut okm)
-        .expect("42 is a valid length for Sha256 to output");
+    hk.expand(&info, &mut okm).expect("42 is a valid length for Sha256 to output");
 
     let expected = hex!(
         "
@@ -209,8 +208,7 @@
 
     // Compute HKDF-Expand on the concatenation of all the info components
     let mut oneshot_res = [0u8; 16];
-    hkdf.expand(&info_components.concat(), &mut oneshot_res)
-        .unwrap();
+    hkdf.expand(&info_components.concat(), &mut oneshot_res).unwrap();
 
     // Now iteratively join the components of info_components until it's all 1 component. The value
     // of HKDF-Expand should be the same throughout
@@ -264,12 +262,9 @@
             let info = test.info;
             let okm = test.okm;
             let tc_id = test.tc_id;
-            if let Some(desc) = run_test::<K>(
-                ikm.as_slice(),
-                salt.as_slice(),
-                info.as_slice(),
-                okm.as_slice(),
-            ) {
+            if let Some(desc) =
+                run_test::<K>(ikm.as_slice(), salt.as_slice(), info.as_slice(), okm.as_slice())
+            {
                 panic!(
                     "\n\
                          Failed test {tc_id}: {desc}\n\
diff --git a/nearby/crypto/crypto_provider_test/src/hmac.rs b/nearby/crypto/crypto_provider_test/src/hmac.rs
index e3d1c0e..7e5fdd3 100644
--- a/nearby/crypto/crypto_provider_test/src/hmac.rs
+++ b/nearby/crypto/crypto_provider_test/src/hmac.rs
@@ -107,11 +107,7 @@
             return Some("whole message");
         }
     } else {
-        return if result_bytes == tag {
-            Some("invalid should not match")
-        } else {
-            None
-        };
+        return if result_bytes == tag { Some("invalid should not match") } else { None };
     }
 
     // test reading different chunk sizes
diff --git a/nearby/crypto/crypto_provider_test/src/lib.rs b/nearby/crypto/crypto_provider_test/src/lib.rs
index f7d6253..8e63f44 100644
--- a/nearby/crypto/crypto_provider_test/src/lib.rs
+++ b/nearby/crypto/crypto_provider_test/src/lib.rs
@@ -23,6 +23,7 @@
 
 pub use rstest_reuse;
 
+pub mod aead;
 pub mod aes;
 pub mod ed25519;
 pub mod elliptic_curve;
@@ -54,18 +55,12 @@
 
 /// Test for `constant_time_eq` when the two inputs are equal.
 pub fn constant_time_eq_test_equal<C: CryptoProvider>(_marker: PhantomData<C>) {
-    assert!(C::constant_time_eq(
-        &hex!("00010203040506070809"),
-        &hex!("00010203040506070809")
-    ));
+    assert!(C::constant_time_eq(&hex!("00010203040506070809"), &hex!("00010203040506070809")));
 }
 
 /// Test for `constant_time_eq` when the two inputs are not equal.
 pub fn constant_time_eq_test_not_equal<C: CryptoProvider>(_marker: PhantomData<C>) {
-    assert!(!C::constant_time_eq(
-        &hex!("00010203040506070809"),
-        &hex!("00000000000000000000")
-    ));
+    assert!(!C::constant_time_eq(&hex!("00010203040506070809"), &hex!("00000000000000000000")));
 }
 
 /// Random tests for `constant_time_eq`.
diff --git a/nearby/crypto/crypto_provider_test/src/p256.rs b/nearby/crypto/crypto_provider_test/src/p256.rs
index 6c5f395..9869c9e 100644
--- a/nearby/crypto/crypto_provider_test/src/p256.rs
+++ b/nearby/crypto/crypto_provider_test/src/p256.rs
@@ -106,10 +106,7 @@
     let x = hex!("0000000000000000000000000000000000000000000000000000000000000000");
     let y = hex!("0000000000000000000000000000000000000000000000000000000000000000");
     let result = E::PublicKey::from_affine_coordinates(&x, &y);
-    assert!(
-        result.is_err(),
-        "Creating public key from invalid affine coordinate should fail"
-    );
+    assert!(result.is_err(), "Creating public key from invalid affine coordinate should fail");
 }
 
 /// Test for P256PublicKey::from_sec1_bytes
@@ -120,10 +117,15 @@
              00000000000000000000000000000000000000000000"
     );
     let result = E::PublicKey::from_sec1_bytes(&sec1);
-    assert!(
-        result.is_err(),
-        "Creating public key from point not on curve should fail"
-    );
+    assert!(result.is_err(), "Creating public key from point not on curve should fail");
+}
+
+/// Test for P256PublicKey::from_sec1_bytes
+pub fn from_sec1_bytes_at_infinity_test<E: EcdhProviderForP256Test>(_: PhantomData<E>) {
+    // A single [0] byte represents a point at infinity.
+    let sec1 = hex!("00");
+    let result = E::PublicKey::from_sec1_bytes(&sec1);
+    assert!(result.is_err(), "Creating public key from point at infinity should fail");
 }
 
 /// Test for P256PublicKey::to_affine_coordinates
@@ -141,6 +143,52 @@
     assert_eq!(actual_y, expected_y);
 }
 
+/// Test for P256PublicKey::to_affine_coordinates with compressed point with 0x02 octet prefix.
+/// Support for compressed points is optional according to the specs, but both openssl and
+/// rustcrypto implementations support it.
+pub fn public_key_to_affine_coordinates_compressed02_test<E: EcdhProviderForP256Test>(
+    _: PhantomData<E>,
+) {
+    // https://www.secg.org/sec1-v2.pdf, section 2.3.3
+    let expected_x = hex!("21238e877c2400f15f9ea7d4353ac0a63dcb5d13168a96fcfc93bdc66031ed1c");
+    let expected_y = hex!("fa339bd0886602e91b9d2aa9b43213f660b680b1c97ef09cb1cacdc14e9d85ee");
+    let sec1 = hex!("0221238e877c2400f15f9ea7d4353ac0a63dcb5d13168a96fcfc93bdc66031ed1c");
+    let public_key = E::PublicKey::from_sec1_bytes(&sec1).unwrap();
+    let (actual_x, actual_y) = public_key.to_affine_coordinates().unwrap();
+    assert_eq!(actual_x, expected_x);
+    assert_eq!(actual_y, expected_y);
+}
+
+/// Test for P256PublicKey::to_affine_coordinates with compressed point with 0x03 octet prefix
+/// Support for compressed points is optional according to the specs, but both openssl and
+/// rustcrypto implementations support it.
+pub fn public_key_to_affine_coordinates_compressed03_test<E: EcdhProviderForP256Test>(
+    _: PhantomData<E>,
+) {
+    // https://www.secg.org/sec1-v2.pdf, section 2.3.3
+    let expected_x = hex!("f557ef33d52e540e6aa4e6fcbb62a314adcb051cc8a1fefc69d004c282af81ff");
+    let expected_y = hex!("96cd4c6ed5cbf00bb3184e5cd983c3442160310c8519b4c4d16292be83eec539");
+    let sec1 = hex!("03f557ef33d52e540e6aa4e6fcbb62a314adcb051cc8a1fefc69d004c282af81ff");
+    let public_key = E::PublicKey::from_sec1_bytes(&sec1).unwrap();
+    let (actual_x, actual_y) = public_key.to_affine_coordinates().unwrap();
+    assert_eq!(actual_x, expected_x);
+    assert_eq!(actual_y, expected_y);
+}
+
+/// Test for P256PublicKey::to_affine_coordinates with the top byte being zero
+pub fn public_key_to_affine_coordinates_zero_top_byte_test<E: EcdhProviderForP256Test>(
+    _: PhantomData<E>,
+) {
+    // https://www.secg.org/sec1-v2.pdf, section 2.3.3
+    let expected_x = hex!("00f24fe76679c57bc6c2f025af92e6c0b2058fb15fa41014775987587400ed48");
+    let expected_y = hex!("e09f6fa9979a60f578a62dca805ad75b9e6b89403f2ebb934869e3697ac590e9");
+    let sec1 = hex!("0400f24fe76679c57bc6c2f025af92e6c0b2058fb15fa41014775987587400ed48e09f6fa9979a60f578a62dca805ad75b9e6b89403f2ebb934869e3697ac590e9");
+    let public_key = E::PublicKey::from_sec1_bytes(&sec1).unwrap();
+    let (actual_x, actual_y) = public_key.to_affine_coordinates().unwrap();
+    assert_eq!(actual_x, expected_x);
+    assert_eq!(actual_y, expected_y);
+}
+
 /// Test for P256 Diffie-Hellman key exchange.
 pub fn p256_ecdh_test<E: EcdhProviderForP256Test>(_: PhantomData<E>) {
     // From wycheproof ecdh_secp256r1_ecpoint_test.json, tcId 1
@@ -164,9 +212,7 @@
     let public_key = E::PublicKey::from_sec1_bytes(public_key_sec1).map_err(TestError::new)?;
     let ephemeral_secret = E::EphemeralSecret::from_private_components(private, &public_key)
         .map_err(TestError::new)?;
-    ephemeral_secret
-        .diffie_hellman(&public_key)
-        .map_err(TestError::new)
+    ephemeral_secret.diffie_hellman(&public_key).map_err(TestError::new)
 }
 
 /// Wycheproof test for P256 Diffie-Hellman.
@@ -182,13 +228,9 @@
                 // from the given RNG when generating a new key).
                 continue;
             };
-            std::println!("Testing {}", test.tc_id);
             let result = p256_ecdh_test_impl::<E>(
                 &test.public_key,
-                &test
-                    .private_key
-                    .try_into()
-                    .expect("Private key should be 32 bytes long"),
+                &test.private_key.try_into().expect("Private key should be 32 bytes long"),
             );
             match test.result {
                 wycheproof::TestResult::Valid => {
@@ -197,9 +239,7 @@
                     assert_eq!(test.shared_secret, shared_secret.into());
                 }
                 wycheproof::TestResult::Invalid => {
-                    result
-                        .err()
-                        .unwrap_or_else(|| panic!("Test {} should fail", test.tc_id));
+                    result.err().unwrap_or_else(|| panic!("Test {} should fail", test.tc_id));
                 }
                 wycheproof::TestResult::Acceptable => {
                     if let Ok(shared_secret) = result {
@@ -231,9 +271,19 @@
 #[case::to_bytes(to_bytes_test)]
 #[case::to_bytes_random(to_bytes_random_test)]
 #[case::from_sec1_bytes_not_on_curve(from_sec1_bytes_not_on_curve_test)]
+#[case::from_sec1_bytes_not_on_infinity(from_sec1_bytes_at_infinity_test)]
 #[case::from_affine_coordinates(from_affine_coordinates_test)]
 #[case::from_affine_coordinates_not_on_curve(from_affine_coordinates_not_on_curve_test)]
 #[case::public_key_to_affine_coordinates(public_key_to_affine_coordinates_test)]
+#[case::public_key_to_affine_coordinates_compressed02(
+    public_key_to_affine_coordinates_compressed02_test
+)]
+#[case::public_key_to_affine_coordinates_compressed03(
+    public_key_to_affine_coordinates_compressed03_test
+)]
+#[case::public_key_to_affine_coordinates_zero_top_byte(
+    public_key_to_affine_coordinates_zero_top_byte_test
+)]
 #[case::p256_ecdh(p256_ecdh_test)]
 #[case::wycheproof_p256(wycheproof_p256_test)]
 fn p256_test_cases<C: CryptoProvider>(#[case] testcase: CryptoProviderTestCase<C>) {}
diff --git a/nearby/crypto/crypto_provider_test/src/x25519.rs b/nearby/crypto/crypto_provider_test/src/x25519.rs
index 23f8f9b..0fcaa12 100644
--- a/nearby/crypto/crypto_provider_test/src/x25519.rs
+++ b/nearby/crypto/crypto_provider_test/src/x25519.rs
@@ -98,9 +98,7 @@
     let public_key = E::PublicKey::from_bytes(public_key).map_err(TestError::new)?;
     let ephemeral_secret = E::EphemeralSecret::from_private_components(private, &public_key)
         .map_err(TestError::new)?;
-    ephemeral_secret
-        .diffie_hellman(&public_key)
-        .map_err(TestError::new)
+    ephemeral_secret.diffie_hellman(&public_key).map_err(TestError::new)
 }
 
 /// Wycheproof test for X25519 Diffie-Hellman.
@@ -111,10 +109,7 @@
         for test in test_group.tests {
             let result = x25519_ecdh_test_impl::<E>(
                 &test.public_key,
-                &test
-                    .private_key
-                    .try_into()
-                    .expect("Private keys should be 32 bytes long"),
+                &test.private_key.try_into().expect("Private keys should be 32 bytes long"),
             );
             match test.result {
                 wycheproof::TestResult::Valid => {
@@ -123,9 +118,7 @@
                     assert_eq!(&test.shared_secret, &shared_secret.into());
                 }
                 wycheproof::TestResult::Invalid => {
-                    result
-                        .err()
-                        .unwrap_or_else(|| panic!("Test {} should fail", test.tc_id));
+                    result.err().unwrap_or_else(|| panic!("Test {} should fail", test.tc_id));
                 }
                 wycheproof::TestResult::Acceptable => {
                     if let Ok(shared_secret) = result {
diff --git a/nearby/crypto/rand_core_05_adapter/src/lib.rs b/nearby/crypto/rand_core_05_adapter/src/lib.rs
index 18c2ca7..6484983 100644
--- a/nearby/crypto/rand_core_05_adapter/src/lib.rs
+++ b/nearby/crypto/rand_core_05_adapter/src/lib.rs
@@ -51,9 +51,7 @@
 
     #[cfg(feature = "std")]
     fn try_fill_bytes(&mut self, dest: &mut [u8]) -> Result<(), rand_core05::Error> {
-        self.rng
-            .try_fill_bytes(dest)
-            .map_err(|e| rand_core05::Error::new(e.take_inner()))
+        self.rng.try_fill_bytes(dest).map_err(|e| rand_core05::Error::new(e.take_inner()))
     }
 
     #[cfg(not(feature = "std"))]
diff --git a/nearby/deny.toml b/nearby/deny.toml
index 344e226..d9f6dc8 100644
--- a/nearby/deny.toml
+++ b/nearby/deny.toml
@@ -82,7 +82,9 @@
     "Apache-2.0 WITH LLVM-exception",
     "BSD-3-Clause",
     "BSD-2-Clause",
+    "ISC",
     "Unicode-DFS-2016",
+    "OpenSSL",
     "Unlicense"
 ]
 # List of explicitly disallowed licenses
@@ -214,4 +216,4 @@
 # if not specified. If it is specified but empty, no registries are allowed.
 allow-registry = ["https://github.com/rust-lang/crates.io-index"]
 # List of URLs for allowed Git repositories
-allow-git = []
\ No newline at end of file
+allow-git = []
diff --git a/nearby/presence/CMakeLists.txt b/nearby/presence/CMakeLists.txt
index bf582f5..6fdeed6 100644
--- a/nearby/presence/CMakeLists.txt
+++ b/nearby/presence/CMakeLists.txt
@@ -21,8 +21,7 @@
 
 add_compile_options(-Wall -g -O1 -Wno-deprecated -Wno-deprecated-declarations)
 
-# we need at least version 3.0.6 for the core.h header used in the fuzzers
-find_package(OpenSSL 3.0.5 REQUIRED)
+find_package(OpenSSL REQUIRED)
 if ( OPENSSL_FOUND )
     message(STATUS "OpenSSL Found: ${OPENSSL_VERSION}")
     message(STATUS "OpenSSL Include: ${OPENSSL_INCLUDE_DIR}")
diff --git a/nearby/presence/array_ref/Cargo.toml b/nearby/presence/array_ref/Cargo.toml
index 42b9d6c..f912c41 100644
--- a/nearby/presence/array_ref/Cargo.toml
+++ b/nearby/presence/array_ref/Cargo.toml
@@ -4,4 +4,8 @@
 edition.workspace = true
 publish.workspace = true
 
+[features]
+default = []
+std = []
+
 [dependencies]
diff --git a/nearby/presence/array_ref/src/lib.rs b/nearby/presence/array_ref/src/lib.rs
index 29622d4..3ff84fc 100644
--- a/nearby/presence/array_ref/src/lib.rs
+++ b/nearby/presence/array_ref/src/lib.rs
@@ -17,6 +17,9 @@
 
 //! Crate exposing macros to take array references of slices
 
+#[cfg(feature = "std")]
+extern crate std;
+
 /// Generate an array reference to a subset of a slice-able bit of data
 /// panics if the provided offset and len are out of range of the array
 #[macro_export]
@@ -24,9 +27,8 @@
     ($arr:expr, $offset:expr, $len:expr) => {{
         let offset = $offset;
         let slice = &$arr[offset..offset + $len];
-        let result: &[u8; $len] = slice
-            .try_into()
-            .expect("array ref len and offset should be valid for provided array");
+        let result: &[u8; $len] =
+            slice.try_into().expect("array ref len and offset should be valid for provided array");
         result
     }};
 }
@@ -38,9 +40,8 @@
     ($arr:expr, $offset:expr, $len:expr) => {{
         let offset = $offset;
         let slice = &mut $arr[offset..offset + $len];
-        let result: &mut [u8; $len] = slice
-            .try_into()
-            .expect("array ref len and offset should be valid for provided array");
+        let result: &mut [u8; $len] =
+            slice.try_into().expect("array ref len and offset should be valid for provided array");
         result
     }};
 }
diff --git a/nearby/presence/array_view/Cargo.toml b/nearby/presence/array_view/Cargo.toml
index 0045525..48693c4 100644
--- a/nearby/presence/array_view/Cargo.toml
+++ b/nearby/presence/array_view/Cargo.toml
@@ -4,6 +4,10 @@
 edition.workspace = true
 publish.workspace = true
 
+[features]
+default = []
+std = []
+
 [dependencies]
 
 [dev-dependencies]
diff --git a/nearby/presence/array_view/src/lib.rs b/nearby/presence/array_view/src/lib.rs
index 24a5001..9ba21b1 100644
--- a/nearby/presence/array_view/src/lib.rs
+++ b/nearby/presence/array_view/src/lib.rs
@@ -23,6 +23,9 @@
     clippy::expect_used
 )]
 
+#[cfg(feature = "std")]
+extern crate std;
+
 use core::{borrow, fmt};
 
 /// A view into the first `len` elements of an array.
@@ -88,10 +91,7 @@
         } else {
             let mut array = [T::default(); N];
             array[..slice.len()].copy_from_slice(slice);
-            Some(ArrayView {
-                array,
-                len: slice.len(),
-            })
+            Some(ArrayView { array, len: slice.len() })
         }
     }
 }
@@ -120,10 +120,7 @@
     fn debug_only_shows_len_elements() {
         assert_eq!(
             "[1, 2]",
-            &format!(
-                "{:?}",
-                ArrayView::try_from_array([1, 2, 3, 4, 5], 2).unwrap()
-            )
+            &format!("{:?}", ArrayView::try_from_array([1, 2, 3, 4, 5], 2).unwrap())
         );
     }
 
diff --git a/nearby/presence/ldt/Cargo.toml b/nearby/presence/ldt/Cargo.toml
index d98f223..c4456cc 100644
--- a/nearby/presence/ldt/Cargo.toml
+++ b/nearby/presence/ldt/Cargo.toml
@@ -4,6 +4,10 @@
 edition.workspace = true
 publish.workspace = true
 
+[features]
+default = []
+std = []
+
 [dependencies]
 crypto_provider.workspace = true
 ldt_tbc.workspace = true
diff --git a/nearby/presence/ldt/benches/ldt_scan.rs b/nearby/presence/ldt/benches/ldt_scan.rs
index f6c5a50..dac1374 100644
--- a/nearby/presence/ldt/benches/ldt_scan.rs
+++ b/nearby/presence/ldt/benches/ldt_scan.rs
@@ -35,22 +35,19 @@
             );
             b.iter(|| black_box(state.scan()));
         });
-        c.bench_function(
-            &format!("LDT-XTS-AES-128/SHA-256/XOR pad/{num_keys} keys"),
-            |b| {
-                let mut state = build_bench_state::<_, sha2::Sha256>(
-                    ldt_factory::<
-                        16,
-                        XtsAes128<RustCrypto>,
-                        Swap,
-                        XorPadder<{ crypto_provider::aes::BLOCK_SIZE }>,
-                    >(),
-                    num_keys,
-                    24,
-                );
-                b.iter(|| black_box(state.scan()));
-            },
-        );
+        c.bench_function(&format!("LDT-XTS-AES-128/SHA-256/XOR pad/{num_keys} keys"), |b| {
+            let mut state = build_bench_state::<_, sha2::Sha256>(
+                ldt_factory::<
+                    16,
+                    XtsAes128<RustCrypto>,
+                    Swap,
+                    XorPadder<{ crypto_provider::aes::BLOCK_SIZE }>,
+                >(),
+                num_keys,
+                24,
+            );
+            b.iter(|| black_box(state.scan()));
+        });
         c.bench_function(&format!("LDT-XTS-AES-256/SHA-256/{num_keys} keys",), |b| {
             let mut state = build_bench_state::<_, sha2::Sha256>(
                 ldt_factory::<16, XtsAes256<RustCrypto>, Swap, DefaultPadder>(),
@@ -63,28 +60,22 @@
             let mut state = build_bench_state::<_, sha2::Sha256>(AesCtrFactory {}, num_keys, 24);
             b.iter(|| black_box(state.scan()));
         });
-        c.bench_function(
-            &format!("LDT-XTS-AES-128/BLAKE2b-512/{num_keys} keys",),
-            |b| {
-                let mut state = build_bench_state::<_, blake2::Blake2b512>(
-                    ldt_factory::<16, XtsAes128<RustCrypto>, Swap, DefaultPadder>(),
-                    num_keys,
-                    24,
-                );
-                b.iter(|| black_box(state.scan()));
-            },
-        );
-        c.bench_function(
-            &format!("LDT-XTS-AES-128/BLAKE2s-256/{num_keys} keys",),
-            |b| {
-                let mut state = build_bench_state::<_, blake2::Blake2s256>(
-                    ldt_factory::<16, XtsAes128<RustCrypto>, Swap, DefaultPadder>(),
-                    num_keys,
-                    24,
-                );
-                b.iter(|| black_box(state.scan()));
-            },
-        );
+        c.bench_function(&format!("LDT-XTS-AES-128/BLAKE2b-512/{num_keys} keys",), |b| {
+            let mut state = build_bench_state::<_, blake2::Blake2b512>(
+                ldt_factory::<16, XtsAes128<RustCrypto>, Swap, DefaultPadder>(),
+                num_keys,
+                24,
+            );
+            b.iter(|| black_box(state.scan()));
+        });
+        c.bench_function(&format!("LDT-XTS-AES-128/BLAKE2s-256/{num_keys} keys",), |b| {
+            let mut state = build_bench_state::<_, blake2::Blake2s256>(
+                ldt_factory::<16, XtsAes128<RustCrypto>, Swap, DefaultPadder>(),
+                num_keys,
+                24,
+            );
+            b.iter(|| black_box(state.scan()));
+        });
     }
 }
 
@@ -156,10 +147,7 @@
     hasher.update(&plaintext[..MATCH_LEN]);
     hasher.finalize_and_reset(&mut plaintext_prefix_hash);
 
-    ScanScenario {
-        cipher,
-        plaintext_prefix_hash,
-    }
+    ScanScenario { cipher, plaintext_prefix_hash }
 }
 
 fn random_vec<C: CryptoProvider>(rng: &mut C::CryptoRng, len: usize) -> Vec<u8> {
@@ -248,7 +236,7 @@
 
 impl RandomPadder for DefaultPadder {
     fn generate<C: CryptoProvider>(_rng: &mut C::CryptoRng) -> Self {
-        Self::default()
+        Self
     }
 }
 
diff --git a/nearby/presence/ldt/examples/gen_ldt_xor_pad_test_vectors.rs b/nearby/presence/ldt/examples/gen_ldt_xor_pad_test_vectors.rs
index a36d8d8..517e7ec 100644
--- a/nearby/presence/ldt/examples/gen_ldt_xor_pad_test_vectors.rs
+++ b/nearby/presence/ldt/examples/gen_ldt_xor_pad_test_vectors.rs
@@ -35,9 +35,7 @@
         let ldt_enc = LdtEncryptCipher::<BLOCK_SIZE, XtsAes128<RustCrypto>, Swap>::new(&key);
 
         let mut ciphertext = plaintext.clone();
-        ldt_enc
-            .encrypt(&mut ciphertext, &XorPadder::from(pad_xor))
-            .unwrap();
+        ldt_enc.encrypt(&mut ciphertext, &XorPadder::from(pad_xor)).unwrap();
 
         array.push(json!({
             "plaintext": hex::encode_upper(&plaintext),
diff --git a/nearby/presence/ldt/examples/ldt_benchmark.rs b/nearby/presence/ldt/examples/ldt_benchmark.rs
index ba04ed7..df87c28 100644
--- a/nearby/presence/ldt/examples/ldt_benchmark.rs
+++ b/nearby/presence/ldt/examples/ldt_benchmark.rs
@@ -84,9 +84,7 @@
                 arr_ref.ct_eq(&scenario.plaintext_prefix_hash).into()
             });
 
-            histogram
-                .record((start.elapsed().as_micros()) as u64)
-                .unwrap();
+            histogram.record((start.elapsed().as_micros()) as u64).unwrap();
 
             found
         })
@@ -151,10 +149,5 @@
     hasher.update(&plaintext[..MATCH_LEN]);
     hasher.finalize_into_reset(&mut plaintext_prefix_hash);
 
-    LdtScenario {
-        ldt_enc,
-        ldt_dec,
-        plaintext,
-        plaintext_prefix_hash: plaintext_prefix_hash.into(),
-    }
+    LdtScenario { ldt_enc, ldt_dec, plaintext, plaintext_prefix_hash: plaintext_prefix_hash.into() }
 }
diff --git a/nearby/presence/ldt/examples/ldt_prp.rs b/nearby/presence/ldt/examples/ldt_prp.rs
index 31276b7..f8e055c 100644
--- a/nearby/presence/ldt/examples/ldt_prp.rs
+++ b/nearby/presence/ldt/examples/ldt_prp.rs
@@ -53,7 +53,7 @@
                         &LdtKey::from_random::<RustCrypto>(&mut cp_rng),
                     ),
                     &mut rng,
-                    DefaultPadder::default(),
+                    DefaultPadder,
                     &args,
                 )
             } else {
@@ -65,7 +65,7 @@
                         &LdtKey::from_random::<RustCrypto>(&mut cp_rng),
                     ),
                     &mut rng,
-                    DefaultPadder::default(),
+                    DefaultPadder,
                     &args,
                 )
             };
diff --git a/nearby/presence/ldt/src/lib.rs b/nearby/presence/ldt/src/lib.rs
index d888164..f05c14b 100644
--- a/nearby/presence/ldt/src/lib.rs
+++ b/nearby/presence/ldt/src/lib.rs
@@ -16,12 +16,10 @@
 
 #![no_std]
 #![forbid(unsafe_code)]
-#![deny(
-    clippy::indexing_slicing,
-    clippy::unwrap_used,
-    clippy::panic,
-    clippy::expect_used
-)]
+#![deny(clippy::indexing_slicing, clippy::unwrap_used, clippy::panic, clippy::expect_used)]
+
+#[cfg(feature = "std")]
+extern crate std;
 
 use core::{fmt, marker::PhantomData};
 use crypto_provider::CryptoProvider;
@@ -47,7 +45,7 @@
         LdtEncryptCipher {
             cipher_1: T::EncryptionCipher::new(&key.key_1),
             cipher_2: T::EncryptionCipher::new(&key.key_2),
-            mix_phantom: PhantomData::default(),
+            mix_phantom: PhantomData,
         }
     }
 
@@ -58,7 +56,7 @@
     /// # Errors
     /// - if `data` has a length outside of `[B, B * 2)`.
     pub fn encrypt<P: Padder<B, T>>(&self, data: &mut [u8], padder: &P) -> Result<(), LdtError> {
-        do_ldt::<B, T, M, _, _, _, P>(
+        do_ldt::<B, T, _, _, _, P>(
             data,
             |cipher, tweak, block| cipher.encrypt(tweak, block),
             padder,
@@ -88,7 +86,7 @@
         LdtDecryptCipher {
             cipher_1: T::DecryptionCipher::new(&key.key_1),
             cipher_2: T::DecryptionCipher::new(&key.key_2),
-            mix_phantom: PhantomData::default(),
+            mix_phantom: PhantomData,
         }
     }
 
@@ -99,7 +97,7 @@
     /// # Errors
     /// - if `data` has a length outside of `[B, B * 2)`.
     pub fn decrypt<P: Padder<B, T>>(&self, data: &mut [u8], padder: &P) -> Result<(), LdtError> {
-        do_ldt::<B, T, M, _, _, _, P>(
+        do_ldt::<B, T, _, _, _, P>(
             data,
             |cipher, tweak, block| cipher.decrypt(tweak, block),
             padder,
@@ -113,7 +111,7 @@
 
 // internal implementation of ldt cipher operations, re-used by encryption and decryption, by providing
 // the corresponding cipher_op and mix operation
-fn do_ldt<const B: usize, T, M, O, C, X, P>(
+fn do_ldt<const B: usize, T, O, C, X, P>(
     data: &mut [u8],
     cipher_op: O,
     padder: &P,
@@ -123,7 +121,6 @@
 ) -> Result<(), LdtError>
 where
     T: TweakableBlockCipher<B>,
-    M: Mix,
     // Encrypt or decrypt in place with a tweak
     O: Fn(&C, T::Tweak, &mut [u8; B]),
     // Mix a/b into block-sized chunks
@@ -161,12 +158,8 @@
         z_c3
     };
     let len = data.len();
-    data.get_mut(0..B)
-        .ok_or(LdtError::InvalidLength(len))?
-        .copy_from_slice(&c1);
-    data.get_mut(B..)
-        .ok_or(LdtError::InvalidLength(len))?
-        .copy_from_slice(&c2[B - s..]);
+    data.get_mut(0..B).ok_or(LdtError::InvalidLength(len))?.copy_from_slice(&c1);
+    data.get_mut(B..).ok_or(LdtError::InvalidLength(len))?.copy_from_slice(&c2[B - s..]);
 
     Ok(())
 }
@@ -182,10 +175,9 @@
 impl fmt::Display for LdtError {
     fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
         match self {
-            LdtError::InvalidLength(len) => write!(
-                f,
-                "Invalid length ({len}), must be in [block size, 2 * block size)"
-            ),
+            LdtError::InvalidLength(len) => {
+                write!(f, "Invalid length ({len}), must be in [block size, 2 * block size)")
+            }
         }
     }
 }
diff --git a/nearby/presence/ldt/tests/ldt_roundtrip.rs b/nearby/presence/ldt/tests/ldt_roundtrip.rs
index 33f3fe5..b5f930e 100644
--- a/nearby/presence/ldt/tests/ldt_roundtrip.rs
+++ b/nearby/presence/ldt/tests/ldt_roundtrip.rs
@@ -34,7 +34,7 @@
             do_roundtrip::<16, _, _, _, CryptoProviderImpl>(
                 LdtEncryptCipher::<16, XtsAes128<CryptoProviderImpl>, Swap>::new(&ldt_key),
                 LdtDecryptCipher::<16, XtsAes128<CryptoProviderImpl>, Swap>::new(&ldt_key),
-                &DefaultPadder::default(),
+                &DefaultPadder,
                 &mut rng,
                 &plaintext_len_range,
             )
@@ -43,7 +43,7 @@
             do_roundtrip::<16, _, _, _, CryptoProviderImpl>(
                 LdtEncryptCipher::<16, XtsAes256<CryptoProviderImpl>, Swap>::new(&ldt_key),
                 LdtDecryptCipher::<16, XtsAes256<CryptoProviderImpl>, Swap>::new(&ldt_key),
-                &DefaultPadder::default(),
+                &DefaultPadder,
                 &mut rng,
                 &plaintext_len_range,
             )
diff --git a/nearby/presence/ldt/tests/ldt_test_vectors.rs b/nearby/presence/ldt/tests/ldt_test_vectors.rs
index 9d66926..477243d 100644
--- a/nearby/presence/ldt/tests/ldt_test_vectors.rs
+++ b/nearby/presence/ldt/tests/ldt_test_vectors.rs
@@ -55,16 +55,12 @@
 
         let mut plaintext = [0; 31];
         plaintext[..len].copy_from_slice(&expected_ciphertext);
-        ldt_dec
-            .decrypt(&mut plaintext[..len], &DefaultPadder::default())
-            .unwrap();
+        ldt_dec.decrypt(&mut plaintext[..len], &DefaultPadder).unwrap();
         assert_eq!(&expected_plaintext, &plaintext[..len]);
 
         let mut ciphertext = [0; 31];
         ciphertext[..len].copy_from_slice(&expected_plaintext);
-        ldt_enc
-            .encrypt(&mut ciphertext[..len], &DefaultPadder::default())
-            .unwrap();
+        ldt_enc.encrypt(&mut ciphertext[..len], &DefaultPadder).unwrap();
         assert_eq!(&expected_ciphertext, &ciphertext[..len]);
     }
 
@@ -108,16 +104,12 @@
 
         let mut plaintext = [0; 31];
         plaintext[..len].copy_from_slice(&expected_ciphertext);
-        ldt_dec
-            .decrypt(&mut plaintext[..len], &XorPadder::from(xor_pad))
-            .unwrap();
+        ldt_dec.decrypt(&mut plaintext[..len], &XorPadder::from(xor_pad)).unwrap();
         assert_eq!(&expected_plaintext, &plaintext[..len]);
 
         let mut ciphertext = [0; 31];
         ciphertext[..len].copy_from_slice(&expected_plaintext);
-        ldt_enc
-            .encrypt(&mut ciphertext[..len], &XorPadder::from(xor_pad))
-            .unwrap();
+        ldt_enc.encrypt(&mut ciphertext[..len], &XorPadder::from(xor_pad)).unwrap();
         assert_eq!(&expected_ciphertext, &ciphertext[..len]);
     }
 
diff --git a/nearby/presence/ldt/tests/tests.rs b/nearby/presence/ldt/tests/tests.rs
index 56e5947..b9e061a 100644
--- a/nearby/presence/ldt/tests/tests.rs
+++ b/nearby/presence/ldt/tests/tests.rs
@@ -24,7 +24,7 @@
 
 #[test]
 fn normal_pad_empty() {
-    let padder = DefaultPadder::default();
+    let padder = DefaultPadder;
     let tweak: xts_aes::Tweak =
         <DefaultPadder as Padder<16, XtsAes128<CryptoProviderImpl>>>::pad_tweak(&padder, &[]);
     let bytes = tweak.le_bytes();
@@ -37,7 +37,7 @@
 
 #[test]
 fn normal_pad_one_byte() {
-    let padder = DefaultPadder::default();
+    let padder = DefaultPadder;
     let tweak: xts_aes::Tweak =
         <DefaultPadder as Padder<16, XtsAes128<CryptoProviderImpl>>>::pad_tweak(&padder, &[0x81]);
 
@@ -52,7 +52,7 @@
 
 #[test]
 fn normal_pad_max_len() {
-    let padder = DefaultPadder::default();
+    let padder = DefaultPadder;
     let input = [0x99; 15];
     let tweak: xts_aes::Tweak =
         <DefaultPadder as Padder<16, XtsAes128<CryptoProviderImpl>>>::pad_tweak(&padder, &input);
@@ -68,7 +68,7 @@
 #[test]
 #[should_panic]
 fn normal_pad_too_big_panics() {
-    let padder = DefaultPadder::default();
+    let padder = DefaultPadder;
     let input = [0x99; 16];
     <DefaultPadder as Padder<16, XtsAes128<CryptoProviderImpl>>>::pad_tweak(&padder, &input);
 }
@@ -158,10 +158,7 @@
     );
 
     let mut payload = vec![0; len];
-    assert_eq!(
-        Err(LdtError::InvalidLength(len)),
-        ldt_dec.decrypt(&mut payload, &DefaultPadder::default())
-    );
+    assert_eq!(Err(LdtError::InvalidLength(len)), ldt_dec.decrypt(&mut payload, &DefaultPadder));
 }
 
 fn do_length_check_enc(len: usize) {
@@ -170,8 +167,5 @@
     );
 
     let mut payload = vec![0; len];
-    assert_eq!(
-        Err(LdtError::InvalidLength(len)),
-        ldt_enc.encrypt(&mut payload, &DefaultPadder::default())
-    );
+    assert_eq!(Err(LdtError::InvalidLength(len)), ldt_enc.encrypt(&mut payload, &DefaultPadder));
 }
diff --git a/nearby/presence/ldt_np_adv/Cargo.toml b/nearby/presence/ldt_np_adv/Cargo.toml
index d543032..02592ce 100644
--- a/nearby/presence/ldt_np_adv/Cargo.toml
+++ b/nearby/presence/ldt_np_adv/Cargo.toml
@@ -4,6 +4,10 @@
 edition.workspace = true
 publish.workspace = true
 
+[features]
+default = []
+std = []
+
 [dependencies]
 crypto_provider.workspace = true
 array_view.workspace = true
diff --git a/nearby/presence/ldt_np_adv/benches/ldt_adv_scan.rs b/nearby/presence/ldt_np_adv/benches/ldt_adv_scan.rs
index 47544d8..d7d7fad 100644
--- a/nearby/presence/ldt_np_adv/benches/ldt_adv_scan.rs
+++ b/nearby/presence/ldt_np_adv/benches/ldt_adv_scan.rs
@@ -74,10 +74,7 @@
                 .ok()
         })
         .next()
-        .map(|(index, buffer)| MatchResult {
-            matching_index: index,
-            buffer,
-        });
+        .map(|(index, buffer)| MatchResult { matching_index: index, buffer });
 }
 
 fn build_ciphers<C: CryptoProvider>(
diff --git a/nearby/presence/ldt_np_adv/src/lib.rs b/nearby/presence/ldt_np_adv/src/lib.rs
index 6e23573..3785797 100644
--- a/nearby/presence/ldt_np_adv/src/lib.rs
+++ b/nearby/presence/ldt_np_adv/src/lib.rs
@@ -23,6 +23,9 @@
     clippy::expect_used
 )]
 
+#[cfg(feature = "std")]
+extern crate std;
+
 #[cfg(test)]
 mod np_adv_test_vectors;
 #[cfg(test)]
@@ -30,9 +33,7 @@
 
 use array_view::ArrayView;
 use core::fmt;
-use crypto_provider::aes::BLOCK_SIZE;
-use crypto_provider::hmac::Hmac;
-use crypto_provider::CryptoProvider;
+use crypto_provider::{aes::BLOCK_SIZE, CryptoProvider};
 use ldt::{LdtDecryptCipher, LdtEncryptCipher, LdtError, Mix, Padder, Swap, XorPadder};
 use ldt_tbc::TweakableBlockCipher;
 use np_hkdf::{legacy_ldt_expanded_salt, NpHmacSha256Key, NpKeySeedHkdf};
@@ -116,7 +117,7 @@
 > {
     ldt_decrypter: LdtDecryptCipher<B, T, M>,
     metadata_key_tag: [u8; 32],
-    metadata_key_hmac_key: np_hkdf::NpHmacSha256Key<C>,
+    metadata_key_hmac_key: NpHmacSha256Key<C>,
 }
 
 impl<const B: usize, const O: usize, T, M, C> LdtNpAdvDecrypter<B, O, T, M, C>
@@ -155,9 +156,8 @@
                 LdtError::InvalidLength(l) => LdtAdvDecryptError::InvalidLength(l),
             })
             .and_then(|_| {
-                let mut hmac = self.metadata_key_hmac_key.build_hmac();
-                hmac.update(&buffer[..NP_LEGACY_METADATA_KEY_LEN]);
-                hmac.verify_slice(&self.metadata_key_tag)
+                self.metadata_key_hmac_key
+                    .verify_hmac(&buffer[..NP_LEGACY_METADATA_KEY_LEN], self.metadata_key_tag)
                     .map_err(|_| LdtAdvDecryptError::MacMismatch)
                     .map(|_| {
                         ArrayView::try_from_array(buffer, payload.len())
diff --git a/nearby/presence/ldt_np_adv/src/np_adv_test_vectors.rs b/nearby/presence/ldt_np_adv/src/np_adv_test_vectors.rs
index 9d283d1..90d09b1 100644
--- a/nearby/presence/ldt_np_adv/src/np_adv_test_vectors.rs
+++ b/nearby/presence/ldt_np_adv/src/np_adv_test_vectors.rs
@@ -11,12 +11,7 @@
 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 // See the License for the specific language governing permissions and
 // limitations under the License.
-#![allow(
-    clippy::indexing_slicing,
-    clippy::unwrap_used,
-    clippy::panic,
-    clippy::expect_used
-)]
+#![allow(clippy::indexing_slicing, clippy::unwrap_used, clippy::panic, clippy::expect_used)]
 
 extern crate std;
 use crate::{
diff --git a/nearby/presence/ldt_np_adv/src/tests.rs b/nearby/presence/ldt_np_adv/src/tests.rs
index 56e917d..30bc7b6 100644
--- a/nearby/presence/ldt_np_adv/src/tests.rs
+++ b/nearby/presence/ldt_np_adv/src/tests.rs
@@ -11,12 +11,7 @@
 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 // See the License for the specific language governing permissions and
 // limitations under the License.
-#![allow(
-    clippy::indexing_slicing,
-    clippy::unwrap_used,
-    clippy::panic,
-    clippy::expect_used
-)]
+#![allow(clippy::indexing_slicing, clippy::unwrap_used, clippy::panic, clippy::expect_used)]
 
 extern crate alloc;
 
@@ -40,9 +35,8 @@
         let test_state = make_test_components::<CryptoProviderImpl>(&mut rng);
 
         let cipher = build_np_adv_decrypter_from_key_seed(&test_state.hkdf, test_state.hmac);
-        let decrypted = cipher
-            .decrypt_and_verify(&test_state.ciphertext, &test_state.padder)
-            .unwrap();
+        let decrypted =
+            cipher.decrypt_and_verify(&test_state.ciphertext, &test_state.padder).unwrap();
 
         assert_eq!(&test_state.plaintext, decrypted.as_ref());
     }
@@ -92,9 +86,7 @@
         let cipher = test_state.ldt_enc;
 
         let mut plaintext_copy = test_state.plaintext.clone();
-        cipher
-            .encrypt(&mut plaintext_copy[..], &test_state.padder)
-            .unwrap();
+        cipher.encrypt(&mut plaintext_copy[..], &test_state.padder).unwrap();
 
         assert_eq!(test_state.ciphertext, plaintext_copy);
     }
@@ -107,10 +99,7 @@
         LdtEncrypterXtsAes128::<CryptoProviderImpl>::new(&LdtKey::from_concatenated(&[0; 64]));
 
     let mut payload = [0; 7];
-    assert_eq!(
-        Err(LdtError::InvalidLength(7)),
-        ldt_enc.encrypt(&mut payload, &DefaultPadder::default())
-    );
+    assert_eq!(Err(LdtError::InvalidLength(7)), ldt_enc.encrypt(&mut payload, &DefaultPadder));
 }
 
 #[test]
@@ -120,10 +109,7 @@
         LdtEncrypterXtsAes128::<CryptoProviderImpl>::new(&LdtKey::from_concatenated(&[0; 64]));
 
     let mut payload = [0; 40];
-    assert_eq!(
-        Err(LdtError::InvalidLength(40)),
-        ldt_enc.encrypt(&mut payload, &DefaultPadder::default())
-    );
+    assert_eq!(Err(LdtError::InvalidLength(40)), ldt_enc.encrypt(&mut payload, &DefaultPadder));
 }
 
 #[test]
@@ -139,7 +125,7 @@
     let payload = [0; 7];
     assert_eq!(
         Err(LdtAdvDecryptError::InvalidLength(7)),
-        adv_cipher.decrypt_and_verify(&payload, &DefaultPadder::default())
+        adv_cipher.decrypt_and_verify(&payload, &DefaultPadder)
     );
 }
 
@@ -156,7 +142,7 @@
     let payload = [0; 40];
     assert_eq!(
         Err(LdtAdvDecryptError::InvalidLength(40)),
-        adv_cipher.decrypt_and_verify(&payload, &DefaultPadder::default())
+        adv_cipher.decrypt_and_verify(&payload, &DefaultPadder)
     );
 }
 
@@ -170,9 +156,7 @@
         .gen_range(crypto_provider::aes::BLOCK_SIZE..=(crypto_provider::aes::BLOCK_SIZE * 2 - 1));
     let plaintext = random_vec::<C>(rng, payload_len);
 
-    let salt = LegacySalt {
-        bytes: random_bytes::<2, C>(rng),
-    };
+    let salt = LegacySalt { bytes: random_bytes::<2, C>(rng) };
     let padder = salt_padder::<16, C>(salt);
 
     let key_seed: [u8; 32] = random_bytes::<32, C>(rng);
@@ -185,9 +169,7 @@
 
     let mut ciphertext = [0_u8; LDT_XTS_AES_MAX_LEN];
     ciphertext[..plaintext.len()].copy_from_slice(&plaintext);
-    ldt_enc
-        .encrypt(&mut ciphertext[..plaintext.len()], &padder)
-        .unwrap();
+    ldt_enc.encrypt(&mut ciphertext[..plaintext.len()], &padder).unwrap();
 
     LdtAdvTestComponents {
         plaintext,
diff --git a/nearby/presence/ldt_np_adv_ffi/Cargo.lock b/nearby/presence/ldt_np_adv_ffi/Cargo.lock
index 0ad9a64..e58cea8 100644
--- a/nearby/presence/ldt_np_adv_ffi/Cargo.lock
+++ b/nearby/presence/ldt_np_adv_ffi/Cargo.lock
@@ -199,6 +199,7 @@
 dependencies = [
  "cfg-if",
  "crypto_provider",
+ "crypto_provider_stubs",
  "openssl",
  "ouroboros",
 ]
@@ -260,9 +261,9 @@
 
 [[package]]
 name = "der"
-version = "0.7.1"
+version = "0.7.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "bc906908ea6458456e5eaa160a9c08543ec3d1e6f71e2235cedd660cb65f9df0"
+checksum = "82b10af9f9f9f2134a42d3f8aa74658660f2e0234b0eb81bd171df8aa32779ed"
 dependencies = [
  "const-oid",
  "zeroize",
@@ -305,9 +306,9 @@
 
 [[package]]
 name = "elliptic-curve"
-version = "0.13.2"
+version = "0.13.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "6ea5a92946e8614bb585254898bb7dd1ddad241ace60c52149e3765e34cc039d"
+checksum = "22cdacd4d6ed3f9b98680b679c0e52a823b8a2c7a97358d508fe247f2180c282"
 dependencies = [
  "base16ct",
  "crypto-bigint",
@@ -366,9 +367,9 @@
 
 [[package]]
 name = "getrandom"
-version = "0.2.8"
+version = "0.2.9"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c05aeb6a22b8f62540c194aac980f2115af067bfe15a0734d7277a768d396b31"
+checksum = "c85e1d9ab2eadba7e5040d4e09cbd6d072b76a557ad64e797c2cb9d4da21d7e4"
 dependencies = [
  "cfg-if",
  "libc",
@@ -607,9 +608,9 @@
 
 [[package]]
 name = "pkcs8"
-version = "0.10.1"
+version = "0.10.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "3d2820d87d2b008616e5c27212dd9e0e694fb4c6b522de06094106813328cb49"
+checksum = "f950b2377845cebe5cf8b5165cb3cc1a5e0fa5cfa3e1f7f55707d8fd82e0a7b7"
 dependencies = [
  "der",
  "spki",
@@ -785,9 +786,9 @@
 
 [[package]]
 name = "spki"
-version = "0.7.0"
+version = "0.7.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c0445c905640145c7ea8c1993555957f65e7c46d0535b91ba501bc9bfc85522f"
+checksum = "37a5be806ab6f127c3da44b7378837ebf01dadca8510a0e572460216b228bd0e"
 dependencies = [
  "base64ct",
  "der",
diff --git a/nearby/presence/ldt_np_adv_ffi/src/lib.rs b/nearby/presence/ldt_np_adv_ffi/src/lib.rs
index b4dd932..2ed8d95 100644
--- a/nearby/presence/ldt_np_adv_ffi/src/lib.rs
+++ b/nearby/presence/ldt_np_adv_ffi/src/lib.rs
@@ -158,12 +158,9 @@
         get_enc_handle_map()
             .get(&handle.handle)
             .map(|cipher| {
-                cipher
-                    .encrypt(data, &padder)
-                    .map(|_| 0)
-                    .map_err(|e| match e {
-                        ldt::LdtError::InvalidLength(_) => EncryptError::InvalidLength,
-                    })
+                cipher.encrypt(data, &padder).map(|_| 0).map_err(|e| match e {
+                    ldt::LdtError::InvalidLength(_) => EncryptError::InvalidLength,
+                })
             })
             .unwrap_or(Err(EncryptError::InvalidHandle))
     })
diff --git a/nearby/presence/ldt_np_adv_ffi_fuzz/CMakeLists.txt b/nearby/presence/ldt_np_adv_ffi_fuzz/CMakeLists.txt
index 30de4a6..3282533 100644
--- a/nearby/presence/ldt_np_adv_ffi_fuzz/CMakeLists.txt
+++ b/nearby/presence/ldt_np_adv_ffi_fuzz/CMakeLists.txt
@@ -24,16 +24,24 @@
 # Can't use MSAN since EVP_KDF_fetch seems to read uninitialized memory, maybe on purpose?
 add_compile_options(-fsanitize=fuzzer,address)
 
+# we need at least version 3.0.5 for the core.h header used in the fuzzers
+find_package(OpenSSL 3.0.5 REQUIRED)
+if ( OPENSSL_FOUND )
+    message(STATUS "OpenSSL Found: ${OPENSSL_VERSION}")
+    message(STATUS "OpenSSL Include: ${OPENSSL_INCLUDE_DIR}")
+    message(STATUS "OpenSSL Libraries: ${OPENSSL_LIBRARIES}")
+endif()
+
 add_executable(fuzzer_decrypt_bad_mac src/fuzzer_decrypt_bad_mac.c)
 target_link_libraries(fuzzer_decrypt_bad_mac
-    optimized "${CMAKE_SOURCE_DIR}/ldt_np_adv_ffi/target/release/libldt_np_adv_ffi.a"
-    debug "${CMAKE_SOURCE_DIR}/ldt_np_adv_ffi/target/debug/libldt_np_adv_ffi.a"
+    optimized "${CMAKE_SOURCE_DIR}/ldt_np_adv_ffi/target/release/${CMAKE_STATIC_LIBRARY_PREFIX}ldt_np_adv_ffi${CMAKE_STATIC_LIBRARY_SUFFIX}"
+    debug "${CMAKE_SOURCE_DIR}/ldt_np_adv_ffi/target/debug/${CMAKE_STATIC_LIBRARY_PREFIX}ldt_np_adv_ffi${CMAKE_STATIC_LIBRARY_SUFFIX}"
     dl pthread -fsanitize=fuzzer,address)
 target_link_libraries(fuzzer_decrypt_bad_mac OpenSSL::SSL)
 
 add_executable(fuzzer_decrypt_correct_mac src/fuzzer_decrypt_correct_mac.c)
 target_link_libraries(fuzzer_decrypt_correct_mac
-    optimized "${CMAKE_SOURCE_DIR}/ldt_np_adv_ffi/target/release/libldt_np_adv_ffi.a"
-    debug "${CMAKE_SOURCE_DIR}/ldt_np_adv_ffi/target/debug/libldt_np_adv_ffi.a"
+    optimized "${CMAKE_SOURCE_DIR}/ldt_np_adv_ffi/target/release/${CMAKE_STATIC_LIBRARY_PREFIX}ldt_np_adv_ffi${CMAKE_STATIC_LIBRARY_SUFFIX}"
+    debug "${CMAKE_SOURCE_DIR}/ldt_np_adv_ffi/target/debug/${CMAKE_STATIC_LIBRARY_PREFIX}ldt_np_adv_ffi${CMAKE_STATIC_LIBRARY_SUFFIX}"
     dl pthread -fsanitize=fuzzer,address)
 target_link_libraries(fuzzer_decrypt_correct_mac OpenSSL::SSL)
diff --git a/nearby/presence/ldt_np_c_sample/CMakeLists.txt b/nearby/presence/ldt_np_c_sample/CMakeLists.txt
index 58b6f6f..4341c3e 100644
--- a/nearby/presence/ldt_np_c_sample/CMakeLists.txt
+++ b/nearby/presence/ldt_np_c_sample/CMakeLists.txt
@@ -29,9 +29,9 @@
     INSTALL_COMMAND "")
 
 add_executable(sample main.c)
-target_link_libraries(sample 
-    optimized "${CMAKE_SOURCE_DIR}/ldt_np_adv_ffi/target/release/libldt_np_adv_ffi.a"
-    debug "${CMAKE_SOURCE_DIR}/ldt_np_adv_ffi/target/debug/libldt_np_adv_ffi.a"
+target_link_libraries(sample
+    optimized "${CMAKE_SOURCE_DIR}/ldt_np_adv_ffi/target/release/${CMAKE_STATIC_LIBRARY_PREFIX}ldt_np_adv_ffi${CMAKE_STATIC_LIBRARY_SUFFIX}"
+    debug "${CMAKE_SOURCE_DIR}/ldt_np_adv_ffi/target/debug/${CMAKE_STATIC_LIBRARY_PREFIX}ldt_np_adv_ffi${CMAKE_STATIC_LIBRARY_SUFFIX}"
     dl pthread)
 
 if(ENABLE_TESTS)
diff --git a/nearby/presence/ldt_np_c_sample/tests/CMakeLists.txt b/nearby/presence/ldt_np_c_sample/tests/CMakeLists.txt
index c7a39f4..2f0818d 100644
--- a/nearby/presence/ldt_np_c_sample/tests/CMakeLists.txt
+++ b/nearby/presence/ldt_np_c_sample/tests/CMakeLists.txt
@@ -16,11 +16,10 @@
 
 # GoogleTest requires at least C++14
 set(CMAKE_CXX_STANDARD 14)
-add_compile_options(-Wall -Werror -Wextra -Wimplicit-fallthrough -Wextra-semi
-        -Wunreachable-code-aggressive -Wthread-safety
+add_compile_options(-Wall -Wextra -Wimplicit-fallthrough -Wextra-semi
         -Wno-missing-field-initializers -Wno-unused-parameter -Wno-psabi
-        -Wloop-analysis -Wno-unneeded-internal-declaration
-        -Wenum-compare-conditional -Wno-ignored-pragma-optimize
+        -Wno-unneeded-internal-declaration
+        -Wno-ignored-pragma-optimize
         -Wno-bitfield-constant-conversion -Wno-deprecated-this-capture -Wshadow
         -Wsign-compare)
 
@@ -37,13 +36,17 @@
 find_package(benchmark REQUIRED)
 add_compile_options(-fsanitize=address)
 
-find_package(PkgConfig REQUIRED)
-pkg_check_modules(JSONCPP jsoncpp)
-include_directories("${JSONCPP_INCLUDEDIR}")
-
 file(COPY ${CMAKE_SOURCE_DIR}/ldt_np_adv/resources/test/np_adv_test_vectors.json
      DESTINATION ${CMAKE_CURRENT_BINARY_DIR})
 
+set(JSONCPP_DIR ${CMAKE_SOURCE_DIR}/../../third_party/jsoncpp)
+include_directories(${JSONCPP_DIR})
+
+add_library(
+  jsoncpp
+  ${JSONCPP_DIR}/jsoncpp.cpp
+)
+
 add_executable(
   np_ffi_tests
   np_ffi_tests.cc
@@ -56,7 +59,7 @@
 
 target_link_libraries(
   benchmarks
-  "${CMAKE_SOURCE_DIR}/ldt_np_adv_ffi/target/release/libldt_np_adv_ffi.a"
+  "${CMAKE_SOURCE_DIR}/ldt_np_adv_ffi/target/release/${CMAKE_STATIC_LIBRARY_PREFIX}ldt_np_adv_ffi${CMAKE_STATIC_LIBRARY_SUFFIX}"
   OpenSSL::SSL
   benchmark::benchmark
   dl pthread -fsanitize=address
@@ -64,8 +67,8 @@
 
 target_link_libraries(
   np_ffi_tests
-  "${CMAKE_SOURCE_DIR}/ldt_np_adv_ffi/target/release/libldt_np_adv_ffi.a"
-  ${pkgcfg_lib_JSONCPP_jsoncpp}
+  "${CMAKE_SOURCE_DIR}/ldt_np_adv_ffi/target/release/${CMAKE_STATIC_LIBRARY_PREFIX}ldt_np_adv_ffi${CMAKE_STATIC_LIBRARY_SUFFIX}"
+  jsoncpp
   GTest::gtest_main
   OpenSSL::SSL
   dl pthread -fsanitize=address
diff --git a/nearby/presence/ldt_np_jni/.gitignore b/nearby/presence/ldt_np_jni/.gitignore
new file mode 100644
index 0000000..f3d6549
--- /dev/null
+++ b/nearby/presence/ldt_np_jni/.gitignore
@@ -0,0 +1 @@
+/build/
\ No newline at end of file
diff --git a/nearby/presence/ldt_np_jni/Cargo.toml b/nearby/presence/ldt_np_jni/Cargo.toml
new file mode 100644
index 0000000..6803d56
--- /dev/null
+++ b/nearby/presence/ldt_np_jni/Cargo.toml
@@ -0,0 +1,25 @@
+[package]
+name = "ldt_np_jni"
+version.workspace = true
+edition.workspace = true
+publish.workspace = true
+
+[dependencies]
+ldt.workspace = true
+ldt_np_adv.workspace = true
+np_hkdf.workspace = true
+crypto_provider.workspace = true
+crypto_provider_default = {workspace = true, default-features = false}
+
+cfg-if.workspace = true
+jni.workspace = true
+
+[features]
+default = ["rustcrypto"]
+rustcrypto = ["crypto_provider_default/rustcrypto", "crypto_provider_default/std"]
+opensslbssl = ["crypto_provider_default/opensslbssl"]
+boringssl = ["crypto_provider_default/boringssl"]
+
+[lib]
+# JNI wants a .so or equivalent
+crate-type = ["cdylib"]
diff --git a/nearby/presence/ldt_np_jni/java/LdtNpJni/build.gradle.kts b/nearby/presence/ldt_np_jni/java/LdtNpJni/build.gradle.kts
new file mode 100644
index 0000000..3cc0692
--- /dev/null
+++ b/nearby/presence/ldt_np_jni/java/LdtNpJni/build.gradle.kts
@@ -0,0 +1,38 @@
+/*
+ * Copyright 2023 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+plugins {
+    id("java")
+    kotlin("jvm") version "1.8.0"
+}
+
+group = "com.google.android.gms.nearby.presence.hazmat"
+version = "1.0-SNAPSHOT"
+
+repositories {
+    mavenCentral()
+}
+
+dependencies {
+    testImplementation("org.junit.jupiter:junit-jupiter-api:5.8.1")
+    testRuntimeOnly("org.junit.jupiter:junit-jupiter-engine:5.8.1")
+    implementation(kotlin("stdlib"))
+}
+
+tasks.getByName<Test>("test") {
+    useJUnitPlatform()
+    jvmArgs = mutableListOf("-Djava.library.path=../../../../target/debug")
+}
\ No newline at end of file
diff --git a/nearby/presence/ldt_np_jni/java/LdtNpJni/gradle/wrapper/gradle-wrapper.jar b/nearby/presence/ldt_np_jni/java/LdtNpJni/gradle/wrapper/gradle-wrapper.jar
new file mode 100644
index 0000000..249e583
--- /dev/null
+++ b/nearby/presence/ldt_np_jni/java/LdtNpJni/gradle/wrapper/gradle-wrapper.jar
Binary files differ
diff --git a/nearby/presence/ldt_np_jni/java/LdtNpJni/gradle/wrapper/gradle-wrapper.properties b/nearby/presence/ldt_np_jni/java/LdtNpJni/gradle/wrapper/gradle-wrapper.properties
new file mode 100644
index 0000000..070cb70
--- /dev/null
+++ b/nearby/presence/ldt_np_jni/java/LdtNpJni/gradle/wrapper/gradle-wrapper.properties
@@ -0,0 +1,5 @@
+distributionBase=GRADLE_USER_HOME
+distributionPath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-7.6-bin.zip
+zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists
diff --git a/nearby/presence/ldt_np_jni/java/LdtNpJni/gradlew b/nearby/presence/ldt_np_jni/java/LdtNpJni/gradlew
new file mode 100755
index 0000000..a69d9cb
--- /dev/null
+++ b/nearby/presence/ldt_np_jni/java/LdtNpJni/gradlew
@@ -0,0 +1,240 @@
+#!/bin/sh
+
+#
+# Copyright © 2015-2021 the original authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+##############################################################################
+#
+#   Gradle start up script for POSIX generated by Gradle.
+#
+#   Important for running:
+#
+#   (1) You need a POSIX-compliant shell to run this script. If your /bin/sh is
+#       noncompliant, but you have some other compliant shell such as ksh or
+#       bash, then to run this script, type that shell name before the whole
+#       command line, like:
+#
+#           ksh Gradle
+#
+#       Busybox and similar reduced shells will NOT work, because this script
+#       requires all of these POSIX shell features:
+#         * functions;
+#         * expansions «$var», «${var}», «${var:-default}», «${var+SET}»,
+#           «${var#prefix}», «${var%suffix}», and «$( cmd )»;
+#         * compound commands having a testable exit status, especially «case»;
+#         * various built-in commands including «command», «set», and «ulimit».
+#
+#   Important for patching:
+#
+#   (2) This script targets any POSIX shell, so it avoids extensions provided
+#       by Bash, Ksh, etc; in particular arrays are avoided.
+#
+#       The "traditional" practice of packing multiple parameters into a
+#       space-separated string is a well documented source of bugs and security
+#       problems, so this is (mostly) avoided, by progressively accumulating
+#       options in "$@", and eventually passing that to Java.
+#
+#       Where the inherited environment variables (DEFAULT_JVM_OPTS, JAVA_OPTS,
+#       and GRADLE_OPTS) rely on word-splitting, this is performed explicitly;
+#       see the in-line comments for details.
+#
+#       There are tweaks for specific operating systems such as AIX, CygWin,
+#       Darwin, MinGW, and NonStop.
+#
+#   (3) This script is generated from the Groovy template
+#       https://github.com/gradle/gradle/blob/master/subprojects/plugins/src/main/resources/org/gradle/api/internal/plugins/unixStartScript.txt
+#       within the Gradle project.
+#
+#       You can find Gradle at https://github.com/gradle/gradle/.
+#
+##############################################################################
+
+# Attempt to set APP_HOME
+
+# Resolve links: $0 may be a link
+app_path=$0
+
+# Need this for daisy-chained symlinks.
+while
+    APP_HOME=${app_path%"${app_path##*/}"}  # leaves a trailing /; empty if no leading path
+    [ -h "$app_path" ]
+do
+    ls=$( ls -ld "$app_path" )
+    link=${ls#*' -> '}
+    case $link in             #(
+      /*)   app_path=$link ;; #(
+      *)    app_path=$APP_HOME$link ;;
+    esac
+done
+
+APP_HOME=$( cd "${APP_HOME:-./}" && pwd -P ) || exit
+
+APP_NAME="Gradle"
+APP_BASE_NAME=${0##*/}
+
+# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"'
+
+# Use the maximum available, or set MAX_FD != -1 to use that value.
+MAX_FD=maximum
+
+warn () {
+    echo "$*"
+} >&2
+
+die () {
+    echo
+    echo "$*"
+    echo
+    exit 1
+} >&2
+
+# OS specific support (must be 'true' or 'false').
+cygwin=false
+msys=false
+darwin=false
+nonstop=false
+case "$( uname )" in                #(
+  CYGWIN* )         cygwin=true  ;; #(
+  Darwin* )         darwin=true  ;; #(
+  MSYS* | MINGW* )  msys=true    ;; #(
+  NONSTOP* )        nonstop=true ;;
+esac
+
+CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar
+
+
+# Determine the Java command to use to start the JVM.
+if [ -n "$JAVA_HOME" ] ; then
+    if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
+        # IBM's JDK on AIX uses strange locations for the executables
+        JAVACMD=$JAVA_HOME/jre/sh/java
+    else
+        JAVACMD=$JAVA_HOME/bin/java
+    fi
+    if [ ! -x "$JAVACMD" ] ; then
+        die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+    fi
+else
+    JAVACMD=java
+    which java >/dev/null 2>&1 || die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+fi
+
+# Increase the maximum file descriptors if we can.
+if ! "$cygwin" && ! "$darwin" && ! "$nonstop" ; then
+    case $MAX_FD in #(
+      max*)
+        MAX_FD=$( ulimit -H -n ) ||
+            warn "Could not query maximum file descriptor limit"
+    esac
+    case $MAX_FD in  #(
+      '' | soft) :;; #(
+      *)
+        ulimit -n "$MAX_FD" ||
+            warn "Could not set maximum file descriptor limit to $MAX_FD"
+    esac
+fi
+
+# Collect all arguments for the java command, stacking in reverse order:
+#   * args from the command line
+#   * the main class name
+#   * -classpath
+#   * -D...appname settings
+#   * --module-path (only if needed)
+#   * DEFAULT_JVM_OPTS, JAVA_OPTS, and GRADLE_OPTS environment variables.
+
+# For Cygwin or MSYS, switch paths to Windows format before running java
+if "$cygwin" || "$msys" ; then
+    APP_HOME=$( cygpath --path --mixed "$APP_HOME" )
+    CLASSPATH=$( cygpath --path --mixed "$CLASSPATH" )
+
+    JAVACMD=$( cygpath --unix "$JAVACMD" )
+
+    # Now convert the arguments - kludge to limit ourselves to /bin/sh
+    for arg do
+        if
+            case $arg in                                #(
+              -*)   false ;;                            # don't mess with options #(
+              /?*)  t=${arg#/} t=/${t%%/*}              # looks like a POSIX filepath
+                    [ -e "$t" ] ;;                      #(
+              *)    false ;;
+            esac
+        then
+            arg=$( cygpath --path --ignore --mixed "$arg" )
+        fi
+        # Roll the args list around exactly as many times as the number of
+        # args, so each arg winds up back in the position where it started, but
+        # possibly modified.
+        #
+        # NB: a `for` loop captures its iteration list before it begins, so
+        # changing the positional parameters here affects neither the number of
+        # iterations, nor the values presented in `arg`.
+        shift                   # remove old arg
+        set -- "$@" "$arg"      # push replacement arg
+    done
+fi
+
+# Collect all arguments for the java command;
+#   * $DEFAULT_JVM_OPTS, $JAVA_OPTS, and $GRADLE_OPTS can contain fragments of
+#     shell script including quotes and variable substitutions, so put them in
+#     double quotes to make sure that they get re-expanded; and
+#   * put everything else in single quotes, so that it's not re-expanded.
+
+set -- \
+        "-Dorg.gradle.appname=$APP_BASE_NAME" \
+        -classpath "$CLASSPATH" \
+        org.gradle.wrapper.GradleWrapperMain \
+        "$@"
+
+# Stop when "xargs" is not available.
+if ! command -v xargs >/dev/null 2>&1
+then
+    die "xargs is not available"
+fi
+
+# Use "xargs" to parse quoted args.
+#
+# With -n1 it outputs one arg per line, with the quotes and backslashes removed.
+#
+# In Bash we could simply go:
+#
+#   readarray ARGS < <( xargs -n1 <<<"$var" ) &&
+#   set -- "${ARGS[@]}" "$@"
+#
+# but POSIX shell has neither arrays nor command substitution, so instead we
+# post-process each arg (as a line of input to sed) to backslash-escape any
+# character that might be a shell metacharacter, then use eval to reverse
+# that process (while maintaining the separation between arguments), and wrap
+# the whole thing up as a single "set" statement.
+#
+# This will of course break if any of these variables contains a newline or
+# an unmatched quote.
+#
+
+eval "set -- $(
+        printf '%s\n' "$DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS" |
+        xargs -n1 |
+        sed ' s~[^-[:alnum:]+,./:=@_]~\\&~g; ' |
+        tr '\n' ' '
+    )" '"$@"'
+
+exec "$JAVACMD" "$@"
diff --git a/nearby/presence/ldt_np_jni/java/LdtNpJni/gradlew.bat b/nearby/presence/ldt_np_jni/java/LdtNpJni/gradlew.bat
new file mode 100644
index 0000000..53a6b23
--- /dev/null
+++ b/nearby/presence/ldt_np_jni/java/LdtNpJni/gradlew.bat
@@ -0,0 +1,91 @@
+@rem
+@rem Copyright 2015 the original author or authors.
+@rem
+@rem Licensed under the Apache License, Version 2.0 (the "License");
+@rem you may not use this file except in compliance with the License.
+@rem You may obtain a copy of the License at
+@rem
+@rem      https://www.apache.org/licenses/LICENSE-2.0
+@rem
+@rem Unless required by applicable law or agreed to in writing, software
+@rem distributed under the License is distributed on an "AS IS" BASIS,
+@rem WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+@rem See the License for the specific language governing permissions and
+@rem limitations under the License.
+@rem
+
+@if "%DEBUG%"=="" @echo off
+@rem ##########################################################################
+@rem
+@rem  Gradle startup script for Windows
+@rem
+@rem ##########################################################################
+
+@rem Set local scope for the variables with windows NT shell
+if "%OS%"=="Windows_NT" setlocal
+
+set DIRNAME=%~dp0
+if "%DIRNAME%"=="" set DIRNAME=.
+set APP_BASE_NAME=%~n0
+set APP_HOME=%DIRNAME%
+
+@rem Resolve any "." and ".." in APP_HOME to make it shorter.
+for %%i in ("%APP_HOME%") do set APP_HOME=%%~fi
+
+@rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+set DEFAULT_JVM_OPTS="-Xmx64m" "-Xms64m"
+
+@rem Find java.exe
+if defined JAVA_HOME goto findJavaFromJavaHome
+
+set JAVA_EXE=java.exe
+%JAVA_EXE% -version >NUL 2>&1
+if %ERRORLEVEL% equ 0 goto execute
+
+echo.
+echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+echo.
+echo Please set the JAVA_HOME variable in your environment to match the
+echo location of your Java installation.
+
+goto fail
+
+:findJavaFromJavaHome
+set JAVA_HOME=%JAVA_HOME:"=%
+set JAVA_EXE=%JAVA_HOME%/bin/java.exe
+
+if exist "%JAVA_EXE%" goto execute
+
+echo.
+echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME%
+echo.
+echo Please set the JAVA_HOME variable in your environment to match the
+echo location of your Java installation.
+
+goto fail
+
+:execute
+@rem Setup the command line
+
+set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar
+
+
+@rem Execute Gradle
+"%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %*
+
+:end
+@rem End local scope for the variables with windows NT shell
+if %ERRORLEVEL% equ 0 goto mainEnd
+
+:fail
+rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of
+rem the _cmd.exe /c_ return code!
+set EXIT_CODE=%ERRORLEVEL%
+if %EXIT_CODE% equ 0 set EXIT_CODE=1
+if not ""=="%GRADLE_EXIT_CONSOLE%" exit %EXIT_CODE%
+exit /b %EXIT_CODE%
+
+:mainEnd
+if "%OS%"=="Windows_NT" endlocal
+
+:omega
diff --git a/nearby/presence/ldt_np_jni/java/LdtNpJni/settings.gradle.kts b/nearby/presence/ldt_np_jni/java/LdtNpJni/settings.gradle.kts
new file mode 100644
index 0000000..e58d1f3
--- /dev/null
+++ b/nearby/presence/ldt_np_jni/java/LdtNpJni/settings.gradle.kts
@@ -0,0 +1,17 @@
+/*
+ * Copyright 2023 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+rootProject.name = "LdtNpJni"
diff --git a/nearby/presence/ldt_np_jni/java/LdtNpJni/src/main/java/com/google/android/gms/nearby/presence/hazmat/LdtNpCipher.java b/nearby/presence/ldt_np_jni/java/LdtNpJni/src/main/java/com/google/android/gms/nearby/presence/hazmat/LdtNpCipher.java
new file mode 100644
index 0000000..ecd0a85
--- /dev/null
+++ b/nearby/presence/ldt_np_jni/java/LdtNpJni/src/main/java/com/google/android/gms/nearby/presence/hazmat/LdtNpCipher.java
@@ -0,0 +1,162 @@
+/*
+ * Copyright 2022 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.google.android.gms.nearby.presence.hazmat;
+
+/**
+ * LDT-XTS-AES128 implementation using the default "swap" mix function. It is suitable for
+ * encryption or decryption of individual Nearby Presence BLE 4.2 legacy format encrypted payloads.
+ *
+ * <p>To avoid leaking resources, call close() once an instance is no longer needed.
+ *
+ * <p>This class is not thread safe.
+ */
+public class LdtNpCipher implements AutoCloseable {
+
+  /**
+   * Size in bytes of key seed used to derive further keys used for in np ldt operations
+   */
+  private static final int KEY_SEED_SIZE = 32;
+   /**
+   * Size in bytes of the metadata keys calculated hmac tag
+   */
+  private static final int TAG_SIZE = 32;
+  /** Block size of AES. */
+  private static final int BLOCK_SIZE = 16;
+
+  private final long ldtHandle;
+  private boolean closed = false;
+
+  private LdtNpCipher(long ldtHandle) {
+    this.ldtHandle = ldtHandle;
+  }
+
+  /**
+   * Create a new Ldt instance using LDT-XTS-AES128 with the "swap" mix function.
+   *
+   * @param key_seed 64-byte key material from the credential for the identity used to broadcast. The
+   *     supplied byte[] can be zeroed out once this method returns, as the contents are copied.
+   * @return an instance configured with the supplied key
+   * @throws LdtException if the key is the wrong size
+   * @throws LdtException if the tag is the wrong size
+   * @throws LdtException if creating the instance fails
+   */
+  public static LdtNpCipher fromKey(byte[] key_seed, byte[] metadata_key_tag) throws LdtException {
+    if (key_seed.length != KEY_SEED_SIZE) {
+      throw new LdtException("Key must be " + KEY_SEED_SIZE + " bytes");
+    }
+    if (metadata_key_tag.length != TAG_SIZE) {
+      throw new LdtException("Tag must be " + TAG_SIZE + " bytes");
+    }
+
+    long handle = LdtNpJni.createLdtCipher(key_seed, metadata_key_tag);
+    if (handle == 0) {
+      throw new LdtException("Creating Ldt native resources failed");
+    }
+
+    return new LdtNpCipher(handle);
+  }
+
+  /**
+   * Encode a 2 byte salt as a big-endian char.
+   *
+   * @return a char with b1 in the high bits and b2 in the low bits
+   */
+  public static char saltAsChar(byte b1, byte b2) {
+    // byte widening conversion to int sign-extends
+    int highBits = b1 << 8;
+    int lowBits = b2 & 0xFF;
+    // narrowing conversion truncates to low 16 bits
+    return (char) (highBits | lowBits);
+  }
+
+  /**
+   * Encrypt data in place, XORing bytes derived from the salt into the LDT tweaks.
+   *
+   * @param salt the salt that will be used in the advertisement with this encrypted payload. See
+   *     {@link LdtNpCipher#saltAsChar(byte, byte)} for constructing the char
+   *     representation.
+   * @param data plaintext to encrypt in place: the metadata key followed by the data elements to be
+   *     encrypted. The length must be in [16, 31).
+   * @throws IllegalStateException if this instance has already been closed
+   * @throws IllegalArgumentException if data is the wrong length
+   * @throws LdtException if encryption fails
+   */
+  public void encrypt(char salt, byte[] data) throws LdtException {
+    checkPreconditions(data);
+
+    int res = LdtNpJni.encrypt(ldtHandle, salt, data);
+    if (res < 0) {
+      // TODO is it possible for this to fail if the length is correct?
+      throw new LdtException("Could not encrypt: error code " + res);
+    }
+  }
+
+  /**
+   * Decrypt the data in place, XORing the LDT tweak with the provided bytes.
+   *
+   * @param salt the salt extracted from the advertisement that contained this payload. See {@link
+   *     LdtNpCipher#saltAsChar(byte, byte)} for constructing the char representation.
+   * @param data ciphertext to decrypt in place: the metadata key followed by the data elements to
+   *     be decrypted. The length must be in [16, 31).
+   * @throws IllegalStateException if this instance has already been closed
+   * @throws IllegalArgumentException if data is the wrong length
+   * @throws LdtException if decryption fails
+   */
+  public void decrypt_and_verify(char salt, byte[] data) throws LdtException {
+    checkPreconditions(data);
+
+    int res = LdtNpJni.decrypt_and_verify(ldtHandle, salt, data);
+    if (res < 0) {
+      // TODO is it possible for this to fail if the length is correct?
+      throw new LdtException("Could not decrypt: error code " + res);
+    }
+  }
+
+  private void checkPreconditions(byte[] data) {
+    if (closed) {
+      throw new IllegalStateException("Instance has been closed");
+    }
+    if (data.length < BLOCK_SIZE || data.length >= BLOCK_SIZE * 2) {
+      throw new IllegalArgumentException(
+          "Data must be at least " + BLOCK_SIZE + " and less than " + BLOCK_SIZE * 2 + " bytes");
+    }
+  }
+
+  /**
+   * Releases native resources.
+   *
+   * <p>Once closed, an Ldt instance cannot be used further.
+   */
+  @Override
+  public void close() {
+    if (closed) {
+      return;
+    }
+    closed = true;
+
+    int res = LdtNpJni.closeLdtCipher(ldtHandle);
+    if (res < 0) {
+      throw new RuntimeException("Could not close Ldt: error code " + res);
+    }
+  }
+
+  public static class LdtException extends Exception {
+    LdtException(String message) {
+      super(message);
+    }
+  }
+}
diff --git a/nearby/presence/ldt_np_jni/java/LdtNpJni/src/main/java/com/google/android/gms/nearby/presence/hazmat/LdtNpJni.java b/nearby/presence/ldt_np_jni/java/LdtNpJni/src/main/java/com/google/android/gms/nearby/presence/hazmat/LdtNpJni.java
new file mode 100644
index 0000000..bbb0067
--- /dev/null
+++ b/nearby/presence/ldt_np_jni/java/LdtNpJni/src/main/java/com/google/android/gms/nearby/presence/hazmat/LdtNpJni.java
@@ -0,0 +1,62 @@
+/*
+ * Copyright 2022 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package com.google.android.gms.nearby.presence.hazmat;
+
+/** JNI for LDT-XTS-AES128 with the "swap" mix function. */
+class LdtNpJni {
+
+  static {
+    System.loadLibrary("ldt_np_jni");
+  }
+
+  /**
+   * Create an instance of LDT-XTS-AES-128 using the Swap mix function.
+   *
+   * @param key key bytes, must be 4x AES key size = 64 bytes
+   * @return 0 on error, and any other value for success
+   */
+  static native long createLdtCipher(byte[] key_seed, byte[] metadata_key_hmac_tag);
+
+  /**
+   * Close the native resources for an Ldt instance.
+   *
+   * @param ldtHandle An ldt handle returned from {@link LdtNpJni#createLdtCipher}.
+   * @return 0 on success, <0 for any error
+   */
+  static native int closeLdtCipher(long ldtHandle);
+
+  /**
+   * Encrypt the data in place.
+   *
+   * @param ldtHandle An ldt handle returned from {@link LdtNpJni#createLdtCipher}.
+   * @param salt big-endian salt to be expanded into bytes XORd into the LDT tweaks
+   * @param data size must be between 16 and 31 bytes
+   * @return 0 on success, -1 if the data size is wrong, or another negative number for any other
+   *     error
+   */
+  static native int encrypt(long ldtHandle, char salt, byte[] data);
+
+  /**
+   * Decrypt the data in place using the default LDT tweak padding scheme.
+   *
+   * @param ldtHandle An ldt address returned from {@link LdtNpJni#createLdtCipher}.
+   * @param salt big-endian salt to be expanded into bytes XORd into the LDT tweaks
+   * @param data size must be between 16 and 31 bytes
+   * @return 0 on success, -1 if the data size is wrong, -2 if the calculated hmac
+   *     does not match the provided tag or another negative number for any other error
+   */
+  static native int decrypt_and_verify(long ldtHandle, char salt, byte[] data);
+}
diff --git a/nearby/presence/ldt_np_jni/java/LdtNpJni/src/test/java/com/google/android/gms/nearby/presence/hazmat/LdtNpJniTests.kt b/nearby/presence/ldt_np_jni/java/LdtNpJni/src/test/java/com/google/android/gms/nearby/presence/hazmat/LdtNpJniTests.kt
new file mode 100644
index 0000000..dc861c6
--- /dev/null
+++ b/nearby/presence/ldt_np_jni/java/LdtNpJni/src/test/java/com/google/android/gms/nearby/presence/hazmat/LdtNpJniTests.kt
@@ -0,0 +1,51 @@
+/*
+ * Copyright 2023 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.google.android.gms.nearby.presence.hazmat
+
+import org.junit.jupiter.api.Assertions
+import org.junit.jupiter.api.Test
+
+class LdtNpJniTests {
+  @Test
+  fun ldtRoundTripTest() {
+    // Data taken from first test case in ldt_np_adv/resources/test/np_adv_test_vectors.json
+    val key_seed = "CCDB2489E9FCAC42B39348B8941ED19A1D360E75E098C8C15E6B1CC2B620CD39".decodeHex()
+    val hmac_tag = "DFB90A1F9B1FE28D18BBCCA52240B5CC2CCB5F8D5289A3CB64EB3541CA614BB4".decodeHex()
+    val plaintext = "CD683FE1A1D1F846543D0A13D4AEA40040C8D67B".decodeHex()
+    val salt_bytes = "32EE".decodeHex()
+    val expected_ciphertext = "04344411F1E57C841FE0F7150636BC782455059A".decodeHex()
+    val salt = LdtNpCipher.saltAsChar(salt_bytes[0], salt_bytes[1])
+
+    val data = plaintext.copyOf()
+    val LdtCipher = LdtNpCipher.fromKey(key_seed, hmac_tag)
+    LdtCipher.encrypt(salt, data)
+    Assertions.assertArrayEquals(expected_ciphertext, data)
+
+    LdtCipher.decrypt_and_verify(salt, data)
+    Assertions.assertArrayEquals(plaintext, data)
+  }
+}
+
+private fun ByteArray.toHex(): String =
+  joinToString(separator = "") { eachByte -> "%02x".format(eachByte) }
+
+private fun String.decodeHex(): ByteArray {
+  check(length % 2 == 0)
+  return chunked(2)
+    .map { it.toInt(16).toByte() }
+    .toByteArray()
+}
\ No newline at end of file
diff --git a/nearby/presence/ldt_np_jni/src/lib.rs b/nearby/presence/ldt_np_jni/src/lib.rs
new file mode 100644
index 0000000..6415a4f
--- /dev/null
+++ b/nearby/presence/ldt_np_jni/src/lib.rs
@@ -0,0 +1,317 @@
+// Copyright 2022 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+//! JNI adapter for LDT.
+//!
+//! Helpful resources:
+//! - <https://developer.ibm.com/articles/j-jni>
+//! - <https://developer.android.com/training/articles/perf-jni>
+//! - <https://www.iitk.ac.in/esc101/05Aug/tutorial/native1.1/index.html>
+//! - <https://docs.oracle.com/javase/8/docs/technotes/guides/jni/spec/jniTOC.html>
+
+#![no_std]
+#![deny(missing_docs)]
+
+// Allow using Box in no_std
+extern crate alloc;
+
+use alloc::boxed::Box;
+
+use jni::objects::JByteArray;
+use jni::{
+    objects::JClass,
+    sys::{jbyte, jbyteArray, jchar, jint, jlong},
+    JNIEnv,
+};
+
+use ldt::XorPadder;
+use ldt_np_adv::{LdtAdvDecryptError, LdtEncrypterXtsAes128, LdtNpAdvDecrypterXtsAes128};
+use np_hkdf::NpKeySeedHkdf;
+
+use crypto_provider_default::CryptoProviderImpl;
+
+/// Length limits per LDT
+const MIN_DATA_LEN: usize = crypto_provider::aes::BLOCK_SIZE;
+const MAX_DATA_LEN: usize = crypto_provider::aes::BLOCK_SIZE * 2 - 1;
+
+/// Error return value for creating handles
+const CREATE_ERROR: jlong = 0;
+
+// TODO: don't allow panics to cross FFI boundary
+// TODO: JNI null checks? (only if jni crate isn't doing them already).
+
+// TODO: split this into separate APIs for encrypt and decrypt
+struct Ldt {
+    ldt_enc: LdtEncrypterXtsAes128<CryptoProviderImpl>,
+    ldt_dec: LdtNpAdvDecrypterXtsAes128<CryptoProviderImpl>,
+}
+
+/// Create an LDT cipher.
+///
+/// Returns 0 for error, or the pointer as a jlong/i64.
+/// Safety: We know the key pointer is safe as it is coming directly from the JVM.
+#[no_mangle]
+#[allow(clippy::not_unsafe_ptr_arg_deref)]
+pub extern "system" fn Java_com_google_android_gms_nearby_presence_hazmat_LdtNpJni_createLdtCipher(
+    env: JNIEnv,
+    _class: JClass,
+    key_seed: jbyteArray,
+    metadata_key_hmac_tag: jbyteArray,
+) -> jlong {
+    env.get_array_length(unsafe { &JByteArray::from_raw(key_seed) })
+        .map_err(|_| CREATE_ERROR)
+        // check length
+        .and_then(|len| if len as usize != 32 { Err(CREATE_ERROR) } else { Ok(len) })
+        // extract u8 array
+        .and_then(|len| {
+            let mut jbyte_buf = [jbyte::default(); 32];
+            env.get_byte_array_region(
+                unsafe { &JByteArray::from_raw(key_seed) },
+                0,
+                &mut jbyte_buf[..],
+            )
+            .map_err(|_| CREATE_ERROR)
+            .map(|_| (len, jbyte_array_to_u8_array(jbyte_buf)))
+        })
+        // initialize ldt -- we already know the key is the right length
+        .and_then(|(_len, key_seed_buf)| {
+            let hkdf_key_seed = NpKeySeedHkdf::new(&key_seed_buf);
+            let ldt_enc = ldt_np_adv::LdtEncrypterXtsAes128::<CryptoProviderImpl>::new(
+                &hkdf_key_seed.legacy_ldt_key(),
+            );
+
+            let mut tag_buff = [jbyte::default(); 32];
+            let tag = env
+                .get_byte_array_region(
+                    unsafe { &JByteArray::from_raw(metadata_key_hmac_tag) },
+                    0,
+                    &mut tag_buff[..],
+                )
+                .map_err(|_| CREATE_ERROR)
+                .map(|_| jbyte_array_to_u8_array(tag_buff))
+                .unwrap();
+            // TODO: Error handling
+
+            let ldt_dec = ldt_np_adv::build_np_adv_decrypter_from_key_seed::<CryptoProviderImpl>(
+                &hkdf_key_seed,
+                tag,
+            );
+            box_to_handle(Ldt { ldt_enc, ldt_dec }).map_err(|_| CREATE_ERROR)
+        })
+        .unwrap_or_else(|e| e)
+}
+
+/// Close an LDT cipher.
+#[no_mangle]
+pub extern "system" fn Java_com_google_android_gms_nearby_presence_hazmat_LdtNpJni_closeLdtCipher(
+    _env: JNIEnv,
+    _class: JClass,
+    ldt_handle: jlong,
+) -> jint {
+    // create the box, let it be dropped
+    let _ = boxed_from_handle::<Ldt>(ldt_handle);
+    // success -- are there any meaningful error condtions we can even detect?
+    0
+}
+
+/// Encrypt a buffer in place.
+/// Safety: We know the data jArray pointer is safe because it is coming directly from the JVM.
+#[no_mangle]
+#[allow(clippy::not_unsafe_ptr_arg_deref)]
+pub extern "system" fn Java_com_google_android_gms_nearby_presence_hazmat_LdtNpJni_encrypt(
+    env: JNIEnv,
+    _class: JClass,
+    ldt_handle: jlong,
+    salt: jchar,
+    data: jbyteArray,
+) -> jint {
+    jbyte_cipher_data_as_u8_array(&env, data)
+        .and_then(|(len, mut data_u8)| {
+            with_handle::<Ldt, _, _>(ldt_handle, |ldt| {
+                ldt.ldt_enc.encrypt(&mut data_u8[..len], &expand_np_salt_to_padder(salt)).map_err(
+                    |err| match err {
+                        ldt::LdtError::InvalidLength(_) => CipherOpError::DataLen,
+                    },
+                )?;
+                env.set_byte_array_region(
+                    unsafe { &JByteArray::from_raw(data) },
+                    0,
+                    &u8_slice_to_jbyte_array(data_u8)[..len],
+                )
+                .map_err(|_| CipherOpError::JniOp)
+                .map(|_| 0) // success
+            })
+        })
+        .unwrap_or_else(|e| e.to_jni_error_code())
+}
+
+/// Decrypt a buffer in place.
+/// Safety: We know the data pointer is safe because it is coming directly from the JVM.
+#[no_mangle]
+#[allow(clippy::not_unsafe_ptr_arg_deref)]
+pub extern "system" fn Java_com_google_android_gms_nearby_presence_hazmat_LdtNpJni_decrypt_1and_1verify(
+    env: JNIEnv,
+    _class: JClass,
+    ldt_handle: jlong,
+    salt: jchar,
+    data: jbyteArray,
+) -> jint {
+    jbyte_cipher_data_as_u8_array(&env, data)
+        .and_then(|(len, mut data_u8)| {
+            with_handle::<Ldt, _, _>(ldt_handle, |ldt| {
+                let result = ldt
+                    .ldt_dec
+                    .decrypt_and_verify(&data_u8[..len], &expand_np_salt_to_padder(salt))
+                    .map_err(|err| match err {
+                        LdtAdvDecryptError::InvalidLength(_) => CipherOpError::DataLen,
+                        LdtAdvDecryptError::MacMismatch => CipherOpError::MacMisMatch,
+                    })?;
+                data_u8[..result.len()].copy_from_slice(result.as_slice());
+                env.set_byte_array_region(
+                    unsafe { &JByteArray::from_raw(data) },
+                    0,
+                    &u8_slice_to_jbyte_array(data_u8)[..len],
+                )
+                .map_err(|_| CipherOpError::JniOp)
+                .map(|_| 0) // success
+            })
+        })
+        .unwrap_or_else(|e| e.to_jni_error_code())
+}
+
+/// Reconstruct a `Box<T>` from `handle`, and invoke `f` with the resulting `&T`.
+///
+/// The `Box<T>` is leaked after invoking `block` rather than dropped so that the handle can be used
+/// again.
+///
+/// Returns the result of evaluating `f`.
+fn with_handle<T, U, F: FnMut(&T) -> U>(handle: jlong, mut f: F) -> U {
+    let boxed = boxed_from_handle(handle);
+    let ret = f(&boxed);
+
+    // don't consume the box -- need to keep the handle alive
+    Box::leak(boxed);
+
+    ret
+}
+
+/// Reconstruct a `Box<T>` from `handle`.
+///
+/// `handle` must be an aligned, non-null `jlong` representation of a pointer produced from
+/// `Box::into_raw` that has not yet been deallocated.
+fn boxed_from_handle<T>(handle: jlong) -> Box<T> {
+    // on 32-bit systems, truncate i64 to low 32 bits (which should be the only bits that were set
+    // when the jlong handle was created).
+    let handle_usize = handle as usize;
+    // convert pointer-sized integer to pointer
+    unsafe { Box::from_raw(handle_usize as *mut _) }
+}
+
+/// Constructs a `Box<T>`, leaks a pointer to it, and converts the pointer to `jlong`.
+///
+/// If the pointer can't fit, `Err` is returned.
+fn box_to_handle<T>(thing: T) -> Result<jlong, ()> {
+    // Box::new heap allocates space for the thing
+    // Box::into_raw intentionally leaks into an aligned, non-null pointer
+    let pointer = Box::into_raw(Box::new(thing));
+    // As a best practice, cast from pointer to usize because usize is always pointer sized, so the
+    // cast is easy to reason about.
+    // https://doc.rust-lang.org/reference/expressions/operator-expr.html#pointer-to-address-cast
+    let ptr_usize = pointer as usize;
+    // Fallible conversion into a u64 -- eventually 128 bit pointer types will fail here.
+    // Assuming it fits, integer cast should be either no conversion or zero extension.
+    ptr_usize
+        .try_into()
+        .map_err(|_| {
+            // resuscitate the Box so that its drop can run, otherwise we would leak on error
+            unsafe { Box::from_raw(pointer) };
+        })
+        // Now that we know the pointer fits in 64 bits, can cast u64 to i64/jlong.
+        .map(|ptr_64: u64| ptr_64 as jlong)
+}
+
+/// Extract data suitable for Ldt128 cipher ops from a JNI jbyteArray.
+///
+/// Returns `(data len in buffer, buffer)`, or `Err` if any JNI ops fail.
+fn jbyte_cipher_data_as_u8_array(
+    env: &JNIEnv,
+    cipher_data: jbyteArray,
+) -> Result<(usize, [u8; MAX_DATA_LEN]), CipherOpError> {
+    let data_len = env
+        .get_array_length(unsafe { &JByteArray::from_raw(cipher_data) })
+        .map_err(|_| CipherOpError::JniOp)? as usize;
+    if !(MIN_DATA_LEN..=MAX_DATA_LEN).contains(&data_len) {
+        return Err(CipherOpError::DataLen);
+    }
+
+    let mut buf = [jbyte::default(); MAX_DATA_LEN];
+    env.get_byte_array_region(
+        unsafe { &JByteArray::from_raw(cipher_data) },
+        0,
+        &mut buf[0..data_len],
+    )
+    .map_err(|_| CipherOpError::JniOp)?;
+
+    Ok((data_len, jbyte_array_to_u8_array(buf)))
+}
+
+/// Convert a jbyte array to a u8 array
+fn jbyte_array_to_u8_array<const N: usize>(src: [jbyte; N]) -> [u8; N] {
+    let mut dest = [0_u8; N];
+    for i in 0..N {
+        // numeric cast doesn't alter bits, which is what we want
+        // https://doc.rust-lang.org/reference/expressions/operator-expr.html#semantics
+        dest[i] = src[i] as u8;
+    }
+    dest
+}
+
+fn u8_slice_to_jbyte_array<const N: usize>(src: [u8; N]) -> [jbyte; N] {
+    let mut dest = [0_i8; N];
+    for i in 0..N {
+        // numeric cast doesn't alter bits, which is what we want
+        // https://doc.rust-lang.org/reference/expressions/operator-expr.html#semantics
+        dest[i] = src[i] as jbyte;
+    }
+    dest
+}
+
+/// Expand the NP salt to the size needed to be an LDT XorPadder.
+///
+/// Returns a XorPadder containing the HKDF of the salt.
+fn expand_np_salt_to_padder(np_salt: jchar) -> XorPadder<{ crypto_provider::aes::BLOCK_SIZE }> {
+    let salt_bytes = np_salt.to_be_bytes();
+    ldt_np_adv::salt_padder::<16, CryptoProviderImpl>(salt_bytes.into())
+}
+
+#[derive(Debug)]
+enum CipherOpError {
+    /// The mac did not match the provided tag
+    MacMisMatch,
+    /// Data is the wrong length
+    DataLen,
+    /// JNI op failed
+    JniOp,
+}
+
+impl CipherOpError {
+    /// Returns an error code suitable for returning from Ldt encrypt/decrypt JNI calls.
+    fn to_jni_error_code(&self) -> jint {
+        match self {
+            CipherOpError::DataLen => -1,
+            CipherOpError::MacMisMatch => -2,
+            CipherOpError::JniOp => -3,
+        }
+    }
+}
diff --git a/nearby/presence/ldt_tbc/Cargo.toml b/nearby/presence/ldt_tbc/Cargo.toml
index 3c80114..0177f87 100644
--- a/nearby/presence/ldt_tbc/Cargo.toml
+++ b/nearby/presence/ldt_tbc/Cargo.toml
@@ -4,5 +4,9 @@
 edition.workspace = true
 publish.workspace = true
 
+[features]
+default = []
+std = []
+
 [dependencies]
-crypto_provider.workspace = true
\ No newline at end of file
+crypto_provider.workspace = true
diff --git a/nearby/presence/ldt_tbc/src/lib.rs b/nearby/presence/ldt_tbc/src/lib.rs
index e9ef476..d24da7e 100644
--- a/nearby/presence/ldt_tbc/src/lib.rs
+++ b/nearby/presence/ldt_tbc/src/lib.rs
@@ -23,6 +23,9 @@
 
 //! Defining traits for an LDT specific Tweakable Block Cipher
 
+#[cfg(feature = "std")]
+extern crate std;
+
 use crypto_provider::{CryptoProvider, CryptoRng};
 
 /// The higher level trait defining the single block at a time Tweakable Block Cipher types.
diff --git a/nearby/presence/np_hkdf/Cargo.toml b/nearby/presence/np_hkdf/Cargo.toml
index 3d1dd70..885913f 100644
--- a/nearby/presence/np_hkdf/Cargo.toml
+++ b/nearby/presence/np_hkdf/Cargo.toml
@@ -4,6 +4,10 @@
 edition.workspace = true
 publish.workspace = true
 
+[features]
+default = []
+std = []
+
 [dependencies]
 crypto_provider.workspace = true
 ldt.workspace = true
diff --git a/nearby/presence/np_hkdf/benches/np_hkdf.rs b/nearby/presence/np_hkdf/benches/np_hkdf.rs
index da796c4..e3ce506 100644
--- a/nearby/presence/np_hkdf/benches/np_hkdf.rs
+++ b/nearby/presence/np_hkdf/benches/np_hkdf.rs
@@ -60,7 +60,7 @@
                 .collect::<Vec<_>>();
             b.iter(|| {
                 for hkdf in keys.iter() {
-                    black_box(hkdf.extended_unsigned_section_aes_key());
+                    black_box(np_hkdf::UnsignedSectionKeys::aes_key(hkdf));
                 }
             });
         });
diff --git a/nearby/presence/np_hkdf/resources/test/hkdf-test-vectors.json b/nearby/presence/np_hkdf/resources/test/hkdf-test-vectors.json
index 9e3ddb3..b4e283c 100644
--- a/nearby/presence/np_hkdf/resources/test/hkdf-test-vectors.json
+++ b/nearby/presence/np_hkdf/resources/test/hkdf-test-vectors.json
@@ -1,28002 +1,2802 @@
 [
   {
     "extended_section_salt_hkdf": {
-      "derived_salt_first_section_first_de": "255DCD1771E6D81DED9BCF8C555F14CE",
-      "derived_salt_first_section_no_de": "C196A908EFFB37E00129718334C0EC57",
-      "derived_salt_first_section_third_de": "EF35B6297414CDB16412781E2CECC3CF",
-      "section_salt": "65D09CF496AE43A6B1B10578F6B15A3C"
+      "derived_salt_first_section_first_de": "99D59E9A0A1761D40F4F28E1D56F4C25",
+      "derived_salt_first_section_no_de": "4D02FD0C02250E221A8C63A1A9865AE2",
+      "derived_salt_first_section_third_de": "8A72AE14A6EA06DAD91CC5970FBD005F",
+      "section_salt": "C561AB4667AA9D7E126E79F060BAD04F"
     },
     "key_seed_hkdf": {
-      "extended_metadata_iv": "C522D94203D5FFEAAB0885BD",
-      "extended_signed_metadata_key_hmac_key": "180C8309414DEA7095CA0FA3B27FBC0AC467D8283532715926ACEBCBAA159444",
-      "extended_signed_section_aes_key": "309C3EDD40E8E8EE709F436C98D7BE39",
-      "extended_unsigned_metadata_key_hmac_key": "9B36B93B3D39126E981E8F29FDDB583680B203CDB0EF8864EB3F9731DCF1EA3B",
-      "extended_unsigned_section_aes_key": "BDA36F7A35C38944FC6A469484EBAA59",
-      "extended_unsigned_section_mic_hmac_key": "4E715521947F640895E299BC7C2DA764CA37EBBC688D9A482726F8CAA2EF0DFE",
-      "key_seed": "C8DD6C064DD70BF66B93777882335A3F3D6B0DB7D2406971E142061EFD1513CD",
-      "legacy_ldt_key": "9E6ECF42B78E8A6D4A0A28CBED9E5FFD76C98D0D4BF75A2DCF19B0149339120637690462A8B99D12ACEC4888A8191B1484F972DA4D7E7AF009E3E55FE3A35FAE",
-      "legacy_metadata_iv": "4636BA3DB932F2BAFCDE27C5",
-      "legacy_metadata_key_hmac_key": "DCE0D13232AE45688B4EEF3961ECF798A3F53D5489C2BF42E604B665C0083261"
+      "extended_metadata_nonce": "05B8575BCA2486B5A1DD5D7D",
+      "extended_signed_metadata_key_hmac_key": "072C62C8F3A83F2ED0EEDD3107249160FF2ABEEDBEBA4607EF517A60F6640C7C",
+      "extended_signed_section_aes_key": "4DF7DE7DECCF54059C259EC7529D8AF8",
+      "extended_unsigned_metadata_key_hmac_key": "DC9FC71D78B822B6763ED1058E77DFCEF41B5F9F4810330AE034F962700EE225",
+      "extended_unsigned_section_aes_key": "A4E14FCB637F18E3B908635B67F4695B",
+      "extended_unsigned_section_mic_hmac_key": "C456B4C30D6E8F33B2D4010D656E3321ACF572EE09C831A87177B04F0F692AEF",
+      "key_seed": "E78C9A018A4B81DD837D9C7E2995B265E3363AAE9E9F7A46D1E0ECC81689D004",
+      "legacy_ldt_key": "E584BE2B557549287AAF196A765A0BB7F26F81210FFBA9AFE314ED0A4912BC4098779896121E6F0DAFFB30A70F358854C984611C4C249D48D8793F35512CBCE7",
+      "legacy_metadata_key_hmac_key": "EF9805022265A8B11D56B8E9EB2A17307EFC258EA1B8CEF70380BE6A3A3B1F43",
+      "legacy_metadata_nonce": "2ED7B79A45C428DFB747460B"
     },
     "legacy_adv_salt_hkdf": {
-      "adv_salt": "596D",
-      "expanded_salt": "479EFFDF9F0871E50D8A84D92D59F059"
+      "adv_salt": "202A",
+      "expanded_salt": "BBB2F537324B844F10631A119EB7C1C0"
     },
     "legacy_metadata_key_hkdf": {
-      "expanded_key": "B2B8EB87C08475A7C8AFF5E693B06E40",
-      "legacy_metadata_key": "BCD1DE73F85421CFA654A8B5B146"
+      "expanded_key": "EFB7E58C4EF1CE656C9D2691CD46880E",
+      "legacy_metadata_key": "E36847D19B3DB1715E6542D66205"
     }
   },
   {
     "extended_section_salt_hkdf": {
-      "derived_salt_first_section_first_de": "AEEB2746EA655309DF4C762C2F2E7E9A",
-      "derived_salt_first_section_no_de": "30C776A928FEBB1693D34459B25D2BDD",
-      "derived_salt_first_section_third_de": "8AE68CEB994AB7444D596BA6F78051E4",
-      "section_salt": "245E1AE482EDFB862275E3DF53EF3026"
+      "derived_salt_first_section_first_de": "3B9EB63E2B808E95384B37049EC52296",
+      "derived_salt_first_section_no_de": "DA32C8270314D33E521BD6D455CEBAED",
+      "derived_salt_first_section_third_de": "FED4AB32F733BBD3A1F6CC3568925182",
+      "section_salt": "E6F154A2B223214012758A37E5EEEF10"
     },
     "key_seed_hkdf": {
-      "extended_metadata_iv": "775EC65D4E7FD37DECA405C0",
-      "extended_signed_metadata_key_hmac_key": "A2276E388B8ADC3DBEF5DD0CC3F4962B1016BAE9C0A980CA9049D9FAACFD11FB",
-      "extended_signed_section_aes_key": "4D50B4097FD5AF1E0896B5FE4A418620",
-      "extended_unsigned_metadata_key_hmac_key": "C712C90E257BD12ED3B60FCDA060DAE2735FD02695C07BC90ACE2CB639D6F9B0",
-      "extended_unsigned_section_aes_key": "8A9BDAFD6E3E79EC9D47EF3B0EB921A4",
-      "extended_unsigned_section_mic_hmac_key": "E94CB71A7284D1B9E2D2226B48BF35855C9C1F4DA770A2C3E4CD2ADA12FE3030",
-      "key_seed": "858AD49298BE68EF429099EAD86AA3B62D96E1C2358D2181DC1C4D43DFB17F1F",
-      "legacy_ldt_key": "9BBAC810FE170C1E2133A0DE9C1D6EB55A51DB727310791C591009A1ED422B8A94E3B5591B814EC8573EC7F1144F5ED84FDB71DCE782FD3CA0A7952E6F9A3E8F",
-      "legacy_metadata_iv": "B21E320C1327CAC24DD2E53F",
-      "legacy_metadata_key_hmac_key": "5A4102E91D627F48719C8ACAAF1E9F9571D8552BAB416FEE6A0A4885706C92E6"
+      "extended_metadata_nonce": "ABA8038F9AF71FC6C1DA0AA4",
+      "extended_signed_metadata_key_hmac_key": "D65DA42911CD5ED334C530F869DB03C6614CA35E6FA866D9E38E69C777ABB6DA",
+      "extended_signed_section_aes_key": "A017DA593FF63BDF6FE6F77ECFD2AB5E",
+      "extended_unsigned_metadata_key_hmac_key": "A38246B6BD7F50873ACB4C04E0EC64FC189F64055D297E0965D98EEE19173A10",
+      "extended_unsigned_section_aes_key": "6727FBCBDC7B6C29F3ED05346661ADD6",
+      "extended_unsigned_section_mic_hmac_key": "E5DC924147B60D7F39EAA86AD504DB3C37230DBF79EDAB9005150135443864BF",
+      "key_seed": "80FCB0995D122213A13491854547AE8DC1F9DA0FBCDC425EF8CAE2F1621B5123",
+      "legacy_ldt_key": "791FFF186FAB641481FA4F9CED1FA84BE86FD44118214C4D911C7FED6E72367DD7E7D516CA45EBA6F39140D735EAE911C9FD41FF64AA5A1D6FAB6945EF95ACC7",
+      "legacy_metadata_key_hmac_key": "FB0D2011320B53ADC656F21ADAC39599A84660CC06E01E6BF71FA3A13EC7017F",
+      "legacy_metadata_nonce": "65E4371B55813FF7B1EF282B"
     },
     "legacy_adv_salt_hkdf": {
-      "adv_salt": "D52D",
-      "expanded_salt": "C3ABD68B191E6AC8C26D9418BACA8EB8"
+      "adv_salt": "8527",
+      "expanded_salt": "41DF3C96FD61381D21C6B33C4ABF109B"
     },
     "legacy_metadata_key_hkdf": {
-      "expanded_key": "F6F58A94A751588F9B0F64F21ABDDA89",
-      "legacy_metadata_key": "876D4790AEF0714634D404DD474E"
+      "expanded_key": "D3CFD17D054FAEBD7E7FC121915090B3",
+      "legacy_metadata_key": "788B30E87219D982203B007557BE"
     }
   },
   {
     "extended_section_salt_hkdf": {
-      "derived_salt_first_section_first_de": "49752429F30AAE9EAB1DA0A80672B6E5",
-      "derived_salt_first_section_no_de": "07EA37C95B7826A63A9CE43A0871A38B",
-      "derived_salt_first_section_third_de": "C4384D9C45C57574546EE77CABA6FC46",
-      "section_salt": "B1AC51CABB490C777E058EC9B4AEE204"
+      "derived_salt_first_section_first_de": "29F63E30C4CA477654EA633EF851EF2C",
+      "derived_salt_first_section_no_de": "9F1DA62A3038226B6E1A0B7BA3AE6735",
+      "derived_salt_first_section_third_de": "078A761182B0E4C9FAB615B1B5BD76F3",
+      "section_salt": "3EFE885D2597608370E56E69A0EBBE08"
     },
     "key_seed_hkdf": {
-      "extended_metadata_iv": "CCA9F4C407A6A5D178B7F360",
-      "extended_signed_metadata_key_hmac_key": "C14604780D6F24B49053DE2DACC761714431FF2239521E3F547E10294218A2F4",
-      "extended_signed_section_aes_key": "EA4C7B80A763651A45DDEE39F98ABB7A",
-      "extended_unsigned_metadata_key_hmac_key": "C34FF416C9C199C2162CDA474EBB3EA04D252159B7B32FA41AD59283B48F60F7",
-      "extended_unsigned_section_aes_key": "956128F451C2C4E829D8E12C1FCC751D",
-      "extended_unsigned_section_mic_hmac_key": "DFECE7A1482BB67922153B295CA5570940F5CB7217B1CB36764E0284D48B2874",
-      "key_seed": "ADA5E2A10ACB8C7FF96ABFF630862F44E52E337515BB67D7A70C97381AA1E0B0",
-      "legacy_ldt_key": "DD6A74881973745BC5E44409402120E02EFBF3FE3B9E8A294F0FE0A34C3890C7BBA87CA643BAD232FAACA2719B3DA44C0AFA6423B197FC9CD9716420C2ADF643",
-      "legacy_metadata_iv": "958F240556B70F10D7A24057",
-      "legacy_metadata_key_hmac_key": "0ADD9EFD25420694A62B6002B98FEBEC18606605C5AB57F7F1F34870D52CA2FF"
+      "extended_metadata_nonce": "3F20992295F10AD806832D05",
+      "extended_signed_metadata_key_hmac_key": "74273A7D5F63F7E8F319716489804EF7B0693EE94831B24B94DEC7916B3A7E75",
+      "extended_signed_section_aes_key": "95C76B3AB159ECC6AA7AF3806E065EC7",
+      "extended_unsigned_metadata_key_hmac_key": "91ACB7139211ABCEEFD27C3371D8E8E3DA4AA1EF62DE05331A6A97671E4C1E13",
+      "extended_unsigned_section_aes_key": "A6A6E1AB38E8D1E1734D8E6F2ED72F55",
+      "extended_unsigned_section_mic_hmac_key": "81DF7CFC39442A2A065D795A1B836FE11A1E9EDA04DDF5C206A6C5E35DB37442",
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+      "legacy_metadata_nonce": "BED3836FD96FD34EB7FC9983"
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     "legacy_adv_salt_hkdf": {
-      "adv_salt": "AF43",
-      "expanded_salt": "B6496C723F8E4587BD939B60FD2AF37A"
+      "adv_salt": "BE30",
+      "expanded_salt": "66BC953964F357EE08DD1C7668A79D6A"
     },
     "legacy_metadata_key_hkdf": {
-      "expanded_key": "E9CBC120DEC1DBB46028D7FE139B9EF4",
-      "legacy_metadata_key": "C008FFDC576435448A56B813E36D"
+      "expanded_key": "8C16CCF3C80E07746B1F8471932A1FE5",
+      "legacy_metadata_key": "74135EB8B0F379AAA4D4478ADE7F"
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   },
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     "extended_section_salt_hkdf": {
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-      "derived_salt_first_section_no_de": "664DF29A5F2C1541D2B0A07C18F01AB5",
-      "derived_salt_first_section_third_de": "0906D4D56717AA5F2F760BD091C061BB",
-      "section_salt": "2A04D5FD6990B389EC6501C1A46DCC6D"
+      "derived_salt_first_section_first_de": "82AD47824247F00924ECF0A43621BC57",
+      "derived_salt_first_section_no_de": "C737B65B994BF8CD872CA41BDB8A53A7",
+      "derived_salt_first_section_third_de": "9BB8BB55E1DE5129A43AC0EA937B4430",
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     "key_seed_hkdf": {
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-      "legacy_metadata_key_hmac_key": "381F9600CA2B59993C8AF502D8CBD57DFA2C91016B1A279B7F27AC504A51A1D1"
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+      "extended_signed_section_aes_key": "85C1D9D14D09C0722DCFF12643CF2669",
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+      "extended_unsigned_section_aes_key": "43639BFCEBDF4EE61629156E04F92EA0",
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+      "legacy_metadata_nonce": "6803BD4BD4D435930449C17E"
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     "legacy_adv_salt_hkdf": {
-      "adv_salt": "DDA7",
-      "expanded_salt": "B8261F061BB2CC6BBF91B622FB135A11"
+      "adv_salt": "3353",
+      "expanded_salt": "C86C20A42866236AB1CD9F1E815DDFD5"
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     "legacy_metadata_key_hkdf": {
-      "expanded_key": "0E84EE72FC612CBF19A85E89BDC45957",
-      "legacy_metadata_key": "80B50C30A496B58F08BC447776A9"
+      "expanded_key": "95E24D5EA5EBA3152427BF48A3781BDC",
+      "legacy_metadata_key": "4FE2300F2CA3C469959DC0A5510D"
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     "extended_section_salt_hkdf": {
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-      "derived_salt_first_section_no_de": "918F115CA9832C1EBB48DBCDF7162382",
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-      "section_salt": "DA524788DD09B86FE63C546D589230D4"
+      "derived_salt_first_section_first_de": "98C14D785DD885F3D039C8F84EB65B81",
+      "derived_salt_first_section_no_de": "94C66E08758D83DCE457073C6B911483",
+      "derived_salt_first_section_third_de": "1BAED8E606422F18BC5CCD3F649BAEE6",
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     "key_seed_hkdf": {
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-      "extended_signed_section_aes_key": "2803F59CD69FBE299DCAB9A0CEDD5C28",
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-      "legacy_metadata_key_hmac_key": "B53D96DECC728E932CB41FD14977980FFD14CD5964ADB30557FCBE98BD006D0A"
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+      "extended_signed_section_aes_key": "52605A8345524539B05A4DD5DD7A51EC",
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+      "extended_unsigned_section_aes_key": "8A0EC8AE2F2177300A418614507F0F27",
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+      "key_seed": "4F1E079363BF2CF5C475F0D927C36B81FBEC8B4F323A0417184414914AC95ADB",
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+      "legacy_metadata_nonce": "EDE3166B65C4FFCE477B0344"
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     "legacy_adv_salt_hkdf": {
-      "adv_salt": "3AB8",
-      "expanded_salt": "D55E4BDB85CDE43177C96D2AE9C0D0F5"
+      "adv_salt": "D3B5",
+      "expanded_salt": "75DF7B4DAE71EAA2531A2A66BD67CC34"
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     "legacy_metadata_key_hkdf": {
-      "expanded_key": "5DD39B5E4E77874BE010AE15BFBD6C83",
-      "legacy_metadata_key": "889AEFB63168BF9C46E772516F35"
+      "expanded_key": "24921B2F2ADDC07DE0E4818DF0FA218D",
+      "legacy_metadata_key": "F36505BC7D272E0A61E6F825CBCD"
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     "extended_section_salt_hkdf": {
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-      "derived_salt_first_section_no_de": "845CC19B663FD3DC7ADD384CA5327A4B",
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-      "section_salt": "6E740B52FDA44AFD5994EEFAD8D2B9F6"
+      "derived_salt_first_section_first_de": "A188BBEE6CBAB5C972EE985C21ABF21E",
+      "derived_salt_first_section_no_de": "5170EA5075FD2D3346430FE8781E352C",
+      "derived_salt_first_section_third_de": "A7280620B2E6907C765DB1B005C56485",
+      "section_salt": "C362D9DEEAB32835AADB2713E86AA3BE"
     },
     "key_seed_hkdf": {
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-      "legacy_metadata_key_hmac_key": "788C48CDABE90343F300E82D9A3DB7A89424B2C68FE6084A7F378ED9227EAE6B"
+      "extended_metadata_nonce": "BD6393FDA5A002CF968AD7F9",
+      "extended_signed_metadata_key_hmac_key": "6CAFF8DE3681C4445926AF1CB615B8A7EA39687BD24597384002F0EF1BFE7FC2",
+      "extended_signed_section_aes_key": "03A107EEEDE319EC3C14B287533F26F9",
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+      "extended_unsigned_section_aes_key": "918832BE7D5E3E5DCB8D6FFCFC53324C",
+      "extended_unsigned_section_mic_hmac_key": "A0E2D0EE71984DD82D3AC1BDDD030913D4BC9BD276E71E2BEDB57290B0AD652B",
+      "key_seed": "7B1FB28E5884B2B7DEEDC2620A87E729C1AA5E3810C56F59FAAE375BA22750D8",
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+      "legacy_metadata_nonce": "DEC66637548279AB556A1219"
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     "legacy_adv_salt_hkdf": {
-      "adv_salt": "9F6F",
-      "expanded_salt": "C84565E7B093766ED89DCE50A67F269D"
+      "adv_salt": "781C",
+      "expanded_salt": "28C257CC0BDEFCDC63D28B14D38A5E9B"
     },
     "legacy_metadata_key_hkdf": {
-      "expanded_key": "AFCB25D5A4FF0F6C5514A3D7CB70BEBE",
-      "legacy_metadata_key": "701F981110C06419C76BB7F3A87C"
+      "expanded_key": "DD89372C6BC8038EF866314AE0015DBB",
+      "legacy_metadata_key": "D0D0C08326310877A07002234539"
     }
   },
   {
     "extended_section_salt_hkdf": {
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-      "derived_salt_first_section_no_de": "CFBA7AA0B4F0660AB3E26110CEBB248D",
-      "derived_salt_first_section_third_de": "D346C88EA3FCFD580D9CDDA524498F08",
-      "section_salt": "4EA2341C2196501C4451018B0E663733"
+      "derived_salt_first_section_first_de": "425882E16247B61965C2CB122571CFCF",
+      "derived_salt_first_section_no_de": "0C8429B057889FF103029651B0178DB1",
+      "derived_salt_first_section_third_de": "61F70C6EA361790E715295EB500A9DF6",
+      "section_salt": "2BE5976B6054DC8EC9B517B03FA25754"
     },
     "key_seed_hkdf": {
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-      "extended_signed_metadata_key_hmac_key": "0BD0C8A84F341F1BFBB8F3928008D4251E20B294E23B6DA3F354954B374E6534",
-      "extended_signed_section_aes_key": "465DFA7877017B3521C40978F46ECFF7",
-      "extended_unsigned_metadata_key_hmac_key": "06DBD2F3921CEE544E5F8564629F32DA4B900E8B2C05DA1D454D6748E33CBA2F",
-      "extended_unsigned_section_aes_key": "10E9ADCCC2F8EF7566FDEB75024458FF",
-      "extended_unsigned_section_mic_hmac_key": "581058144BFE846874F4F175FFA374B16BFE36CCD449D1BB403FCCAC34912166",
-      "key_seed": "285E2C54EA6B81B4A9F3B70723F37C79ED30A7C6D3FAD915528AE108EECD3E20",
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-      "legacy_metadata_key_hmac_key": "82F98B6E84EAD2730CCB00F9D78AE071197FA635CB1633D61A882951AB5F017F"
+      "extended_metadata_nonce": "22E652B9D05090C3CD17A386",
+      "extended_signed_metadata_key_hmac_key": "B1F52377B751B3CD5456DF79607FF00F47388F2063BE559A151B7B9985030D9A",
+      "extended_signed_section_aes_key": "6C6A2C0C4FB7B10E71D4B9C90DCF97D4",
+      "extended_unsigned_metadata_key_hmac_key": "AE15A2095E41AFC7E33ED5A4F1210E36BC8B08761DCA1A50C8AAAF4D18804096",
+      "extended_unsigned_section_aes_key": "FF93EDCD2458BD330CB8F6461CB5F3FE",
+      "extended_unsigned_section_mic_hmac_key": "2ED5F7C30A3EBF854A6EC62863D9C22CA14BB8B3EE34C2E4CA48AA1972E6D74D",
+      "key_seed": "674EAC48402573CBF8D9C71F862F2F773330F1C8777B86D6C1C054DCBDD7F5BF",
+      "legacy_ldt_key": "C98FED8E0671B3B73E31019FACA33127F2EAE11BBC8D6D503E7C4C36DCDF42F8711EAFAD6E64AE2EDB6D2870203B64EF74388AA0FDFDEC9372AE06E4B14639BD",
+      "legacy_metadata_key_hmac_key": "C39A23027BA99068BB113712449125BE8B4E891C92B9B822EF14FEEFF64D01F3",
+      "legacy_metadata_nonce": "03759271308F135FCD00566D"
     },
     "legacy_adv_salt_hkdf": {
-      "adv_salt": "DCFF",
-      "expanded_salt": "F9D3C89AB53257E1B365E331D40DD830"
+      "adv_salt": "F14E",
+      "expanded_salt": "1F35B6CAACCB4DABC88F014F186FD58A"
     },
     "legacy_metadata_key_hkdf": {
-      "expanded_key": "62121FD6A502BC76CCC7B29DBE913587",
-      "legacy_metadata_key": "17CDD9822CDE244E664788588728"
+      "expanded_key": "4DBA128B48257E51906815A44EBB31C8",
+      "legacy_metadata_key": "1BCB5E77E87246FB145B53599415"
     }
   },
   {
     "extended_section_salt_hkdf": {
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-      "derived_salt_first_section_no_de": "9E841AD1ABD9FFE35A2A8598793B2246",
-      "derived_salt_first_section_third_de": "6F59261CAE19F3404B64D466DCE7853B",
-      "section_salt": "3F01F9FCB8D1D2F5A5E693698CDA0186"
+      "derived_salt_first_section_first_de": "C210EEC7E5F37ED5DD585CA78E4F461C",
+      "derived_salt_first_section_no_de": "512F88EC4D2C1D98155A79C50766881E",
+      "derived_salt_first_section_third_de": "5C51EAFD14CCB470D455818FC233951D",
+      "section_salt": "1F6F7DCED1EAB1B9AC53C24BF29D9E74"
     },
     "key_seed_hkdf": {
-      "extended_metadata_iv": "85ACB3F2F2C7020BC1F08AFC",
-      "extended_signed_metadata_key_hmac_key": "072A10ECC5A1A70E10F02811CE339D28066D7941BB39FA358D20117DC90D2D87",
-      "extended_signed_section_aes_key": "F9DB66D3B30AEAFDE9480A5C36DE1C81",
-      "extended_unsigned_metadata_key_hmac_key": "A9E7F7A89041BE1B69BC90DA246765238D1D3C6D9E86BC4ABAFEEE6601152BD9",
-      "extended_unsigned_section_aes_key": "52CD894DD57CB668D0D3FAA77886E824",
-      "extended_unsigned_section_mic_hmac_key": "C87C616BD3C4BB731C463D5B8C7717DE9B8F4489B9E6CEB93A9F9E2DDEF5F3BF",
-      "key_seed": "344637B0780FD9AA316B89CC81C19D8EB094BAC01889AE883A19B81D432E392F",
-      "legacy_ldt_key": "3A26D849A55B39EC5961C316DDDF0E25B1EE7DFCE69629C59E6E92E56D2207040C601C7DA0458D6F9EF999B07174100296F7787999BE34DD4E2FCC0FD99024F9",
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-      "legacy_metadata_key_hmac_key": "810A916DA94BE2E60638916654D5D9FCD675AE4DA2CA1FBB9DF8B09760CDD4DF"
+      "extended_metadata_nonce": "6EAE4DC82AB5941A1E09FEF9",
+      "extended_signed_metadata_key_hmac_key": "8646A00AC8922FCCC259807B3B9EAEC556701927DC03ACADCB1DE1517F2C6C3B",
+      "extended_signed_section_aes_key": "DA63146BE1A81A806C6DFADB9076E6C8",
+      "extended_unsigned_metadata_key_hmac_key": "2F437D2C9BD771D02A87C0E17CB053958F62DC13559413C871FC01B4E5FB496E",
+      "extended_unsigned_section_aes_key": "9366D940C998995D7846B28F0FCA05E1",
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     "legacy_adv_salt_hkdf": {
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-      "expanded_salt": "D095266226ED6B091371A0A6B50C9E1A"
+      "adv_salt": "18BD",
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     "legacy_metadata_key_hkdf": {
-      "expanded_key": "A5517B99083925411D411CDFC1CC61E7",
-      "legacy_metadata_key": "BE41C1DFDD4689A4FA953DFF6F2B"
+      "expanded_key": "ED1208D4B3435736B92075B4E2DFBA3D",
+      "legacy_metadata_key": "AF7F068F3FD3FEF1B9ECA66F33A0"
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     "extended_section_salt_hkdf": {
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-      "derived_salt_first_section_no_de": "67A5624EE3666CAB802210BD5313AC85",
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-      "section_salt": "CD04E7440CBFF9B1606B4871663A9071"
+      "derived_salt_first_section_first_de": "B27EF32036E2AD671536F7CDFCF3D8D4",
+      "derived_salt_first_section_no_de": "3841B50190E59B72F7F47281ED980317",
+      "derived_salt_first_section_third_de": "1658D434AD2BD8190467E009476C1F7B",
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     "key_seed_hkdf": {
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-      "legacy_metadata_key_hmac_key": "D5FB271FFD50EB9A85E079C7793029834689871861503818403759CF21D273A0"
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     "legacy_adv_salt_hkdf": {
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-      "expanded_salt": "5FF67D98AEFE0745AB0CB5908528C214"
+      "adv_salt": "94A0",
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     "legacy_metadata_key_hkdf": {
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-      "legacy_metadata_key": "09E5B01431E589A8128F676B5DE8"
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+      "legacy_metadata_key": "1DD0B9A032ADAB96501E851CD707"
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     "extended_section_salt_hkdf": {
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-      "derived_salt_first_section_third_de": "565CDC77DEEAAAFA89BBF4279F0B1685",
-      "section_salt": "75B099677F55554347CE466B27C81A76"
+      "derived_salt_first_section_first_de": "64C97FC6CB9A499116614733309E473D",
+      "derived_salt_first_section_no_de": "3B2B9FCD5DEAEE859EFE8B7C2C8FF150",
+      "derived_salt_first_section_third_de": "38999F9FDE0BB4A02621675A265C0F53",
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     "key_seed_hkdf": {
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+      "key_seed": "26005EBE2B54878D7D51E8AE0A133F601F845706CFFE22EF5406E848D743CDBD",
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     },
     "legacy_adv_salt_hkdf": {
-      "adv_salt": "7230",
-      "expanded_salt": "67C59EB68CB5471A383C9B02908EB172"
+      "adv_salt": "35EE",
+      "expanded_salt": "6DD6FC15DC3871D1664A44C78A886FC4"
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     "legacy_metadata_key_hkdf": {
-      "expanded_key": "CF39C15043233D12FE5D13F703F41C61",
-      "legacy_metadata_key": "E7FD7AE8167FD3BC32F74945CEA8"
+      "expanded_key": "D1B46D2631F70EEDEB29AA47D4437686",
+      "legacy_metadata_key": "1416021C29E743088B02B41B571E"
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     "extended_section_salt_hkdf": {
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-      "section_salt": "911B8A531EDC0D06A3A4EC9AD08632A6"
+      "derived_salt_first_section_first_de": "9651CD6607E54363129153CA5315FB86",
+      "derived_salt_first_section_no_de": "0A54495999A555463622F3875F8B0589",
+      "derived_salt_first_section_third_de": "E47744FCFD5DC037621555A11E000988",
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     "legacy_adv_salt_hkdf": {
-      "adv_salt": "47BF",
-      "expanded_salt": "32D8CAF71A84D0E5F901C788321EEB04"
+      "adv_salt": "00CA",
+      "expanded_salt": "B2D541DDC7E007FD5D9B394E66C33319"
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     "legacy_metadata_key_hkdf": {
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-      "legacy_metadata_key": "5C415E7B40EE8CAA303D08ECEB99"
+      "expanded_key": "0A4F31037E77231B0B51C8A447E3E329",
+      "legacy_metadata_key": "03E5B8D922677CE5DC011BAFFBEF"
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   {
     "extended_section_salt_hkdf": {
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-      "section_salt": "DA5851A9E3E279282C319BD07B42EC43"
+      "derived_salt_first_section_first_de": "9B1DCFE8149C1EBD905A5F2B71341C05",
+      "derived_salt_first_section_no_de": "BEF89573FEA45BEE4E9BF988824904F6",
+      "derived_salt_first_section_third_de": "41E32C74EDC315E7929DDA7FBC91CC8E",
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     "key_seed_hkdf": {
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-      "legacy_metadata_key_hmac_key": "09A866855498B3FB15D94B4D5DE6F9CEF85C7599F1D7B9DF1A5EE06F424D21EE"
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+      "extended_signed_section_aes_key": "76FD6B925AA863C06D42FBEC0F29B98C",
+      "extended_unsigned_metadata_key_hmac_key": "C80E7E9DE0E1357E95AEBABEA46C14C4065D8FB1B4B4CF755413B3F5EBD930C7",
+      "extended_unsigned_section_aes_key": "AF6EB46E7DE399B15CBBB1F54BA7436A",
+      "extended_unsigned_section_mic_hmac_key": "0F3EB356450F0A6C99BCBA4D69899631CCB0E18D5CAAFBF844D61B741EA44E9C",
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+      "legacy_metadata_nonce": "E188B583B00F2910B16EF19F"
     },
     "legacy_adv_salt_hkdf": {
-      "adv_salt": "4B06",
-      "expanded_salt": "C17C736108137399E55C9A27CE005797"
+      "adv_salt": "E5D8",
+      "expanded_salt": "FBEED7B8E11129FBB42F282F988B1A81"
     },
     "legacy_metadata_key_hkdf": {
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-      "legacy_metadata_key": "F4919C7A2E2AEC4F1D3BD98337F6"
+      "expanded_key": "95124B323D4373E93FD74091B97406D6",
+      "legacy_metadata_key": "CE875009453430A68CDB21A04D5F"
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   },
   {
     "extended_section_salt_hkdf": {
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-      "derived_salt_first_section_no_de": "092A35F2673596C693A67C2D814395A1",
-      "derived_salt_first_section_third_de": "D8330CC7F4CDDDE57E08C823E90C57E2",
-      "section_salt": "A7C33027F3EF524151C5E2C74CF9A161"
+      "derived_salt_first_section_first_de": "A04BF6A2FF522EFB9682A288C93BB656",
+      "derived_salt_first_section_no_de": "57DC6F81CE5B7432540EB145659C56D1",
+      "derived_salt_first_section_third_de": "769504709A8FCC5EAC8927039CE9DA64",
+      "section_salt": "B10E4B3856910D59B98435355E69AB25"
     },
     "key_seed_hkdf": {
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-      "extended_signed_metadata_key_hmac_key": "C28A813908FE7B82B9B2CC2BF40D741ABFA6D44C153EA3FB5C109E4DE50C5AA9",
-      "extended_signed_section_aes_key": "3A49CBEAB2E5896FE9994C7A66D60B6B",
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-      "extended_unsigned_section_aes_key": "518FF47B9521BD36EC7D2F4BDDB7B263",
-      "extended_unsigned_section_mic_hmac_key": "336418897DDE38C52CC38AD3946161E15CFD01EDB4216DCDE1EA6E9E0A17649E",
-      "key_seed": "183355DAFF5433C1B814EBEBD85709F68B2CDEC7A138F4B75FF79B71CC2F97A7",
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-      "legacy_metadata_key_hmac_key": "C54D30E1AF04C1CC2FF1E1F41A85EE6CBC32E9A732079514D5F0E19A2E4FDE14"
+      "extended_metadata_nonce": "C0FC2A8AD5C0AD828ACD91F5",
+      "extended_signed_metadata_key_hmac_key": "720F677655EB635563DE99FA07E045D7074C1E099401341E7A7A3C93B55BAD55",
+      "extended_signed_section_aes_key": "BDE744442E32EBA45FCC5C6340342AE9",
+      "extended_unsigned_metadata_key_hmac_key": "1B380539C060707E986587B52E0EFB9EBC7907F939467741D385A3A706137078",
+      "extended_unsigned_section_aes_key": "AD4E22885C75C1767DDD55943AA675C9",
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     "legacy_adv_salt_hkdf": {
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     "legacy_metadata_key_hkdf": {
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-      "legacy_metadata_key": "4C6CC5E14A9FC5E9D203DFA22992"
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     "extended_section_salt_hkdf": {
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-      "section_salt": "DDC914F8D2702F7CCC00F12B238B604D"
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     "legacy_adv_salt_hkdf": {
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     "legacy_metadata_key_hkdf": {
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-      "legacy_metadata_key": "B5E9F861C07830D523548F82F781"
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-      "section_salt": "870650583BFE2467CC0BAA720F9E2A71"
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     "legacy_adv_salt_hkdf": {
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-      "expanded_salt": "0DEB2CE43751D3DDAF6455168BA9E4BB"
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     "legacy_metadata_key_hkdf": {
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-      "legacy_metadata_key": "280F3B8CAB024935ACA1C72DA581"
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+      "legacy_metadata_key": "AE83451CAC8181606BE17AC715C4"
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     "extended_section_salt_hkdf": {
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-      "section_salt": "01BFD9768AC19831128C8122C9686D66"
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+      "derived_salt_first_section_no_de": "7548394C226D05F10C9B557BD0359040",
+      "derived_salt_first_section_third_de": "2E8189954D8068F3CB284740CE552CCD",
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     "legacy_adv_salt_hkdf": {
-      "adv_salt": "2562",
-      "expanded_salt": "03D965DEAB97242826B4FF19C3BFC773"
+      "adv_salt": "AF5C",
+      "expanded_salt": "C7F68B27D565702CF382B680B8E7055F"
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     "legacy_metadata_key_hkdf": {
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-      "legacy_metadata_key": "EFB497510B524AAFA42FF37A3FE3"
+      "expanded_key": "1CC170AD6BC9799CB87FECFEB7FB593B",
+      "legacy_metadata_key": "4D860E0531136A82B22D80EED522"
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     "extended_section_salt_hkdf": {
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-      "derived_salt_first_section_no_de": "40204FE647A0AFD99F12853A9A1834F6",
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-      "section_salt": "891488552A05536B7CE1D6B7EBC38BB7"
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+      "derived_salt_first_section_no_de": "014EA160B58368629BA76FF16A844341",
+      "derived_salt_first_section_third_de": "9ABC5ED7EF8973C8FF865B6174CF18D8",
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     },
     "key_seed_hkdf": {
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-      "legacy_metadata_key_hmac_key": "12DCDC4D5CFD65313D44BABFA9B4A82DB13314718C426B80C32603AECB14663A"
+      "extended_metadata_nonce": "69EFD440262ABCAD6340712C",
+      "extended_signed_metadata_key_hmac_key": "ABE74AB6340DB962F20CC9D40EAD220DB2E644547F110AAE1AFA59E98ACA5073",
+      "extended_signed_section_aes_key": "C30E2EE7462A487197359E2B1E6B592F",
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+      "extended_unsigned_section_mic_hmac_key": "45F4745792A7129CD8864CDFB715B7047356DF99F7A3ECDFA4F1191C2EEF39DA",
+      "key_seed": "8D228D34A11D8C6E89BEAD97C32CF1CDEB83128EDE806AB12AC1C315104A12C4",
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+      "legacy_metadata_nonce": "22C6BF85F720FB130D698F43"
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     "legacy_adv_salt_hkdf": {
-      "adv_salt": "9033",
-      "expanded_salt": "3718042D9456E6A00ED23B8159FF8826"
+      "adv_salt": "AA36",
+      "expanded_salt": "1DCEFB9DA72BA3A4AEF988EA5C803E39"
     },
     "legacy_metadata_key_hkdf": {
-      "expanded_key": "943B7030E83082AD6EB23BE3F628FABC",
-      "legacy_metadata_key": "343C9CA2F76170028DC5209397E1"
+      "expanded_key": "60989D8A1EB13AE51250E2698F544BD0",
+      "legacy_metadata_key": "E9B69DC6D89A0FB49D43B34F5311"
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   },
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     "extended_section_salt_hkdf": {
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-      "derived_salt_first_section_no_de": "85D95909D49EA6B09DC5CEDB40AEC4F0",
-      "derived_salt_first_section_third_de": "14162C8E0AD0DDF6F5F8C2AD78D3DEB6",
-      "section_salt": "344F469A102CF4DDE9E7ECC7FA323E19"
+      "derived_salt_first_section_first_de": "64555F0FD7574CDB19BA389CDFBC543B",
+      "derived_salt_first_section_no_de": "3E0E5C26DD09AA19522AE9FF60E299B5",
+      "derived_salt_first_section_third_de": "2177B3044D79C03B816CD8E8433C5B3B",
+      "section_salt": "BFE9AF6A7740CD26E60E7C5A8AB281C0"
     },
     "key_seed_hkdf": {
-      "extended_metadata_iv": "3C9A87CEE1C3B4C1A49056A4",
-      "extended_signed_metadata_key_hmac_key": "11E7412891CA8426F061C53DD051546F3DE1F603AA1903115BCBA89AC9A46CB7",
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-      "legacy_metadata_key_hmac_key": "51EE9E159AA7C91E3F2C5EBD082856E92185E2B9487B16B47CA0FCE51C5DED09"
+      "extended_metadata_nonce": "8F2CC361A133B662D60E70B4",
+      "extended_signed_metadata_key_hmac_key": "14F28363041B1AC420116ADBE5E862E36C4F209C68D784AAF659003123931F20",
+      "extended_signed_section_aes_key": "F68813A0A51D3A7D6460C05109EF1730",
+      "extended_unsigned_metadata_key_hmac_key": "6AC0B8555E39508D3F72BA8984E530E59A42777BEB16A2A6CFC760345AB6AB13",
+      "extended_unsigned_section_aes_key": "F3DF15F42B2DCD3617C60847F88EC279",
+      "extended_unsigned_section_mic_hmac_key": "149F3635D7BB841DE87493388AF27E75F0D5C374DF9108C5865EB3F1B631AD1A",
+      "key_seed": "0D4D259D5D0E5D7C9B2A569A1C17D389E618B782D1BCE04F8484035492CE11C4",
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     "legacy_adv_salt_hkdf": {
-      "adv_salt": "E3BC",
-      "expanded_salt": "5F0B45C0434D33B17031611DD6EF080F"
+      "adv_salt": "57EB",
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     "legacy_metadata_key_hkdf": {
-      "expanded_key": "A39EAD2B3BA5DA75FFBBB3E770BB28BA",
-      "legacy_metadata_key": "0E408C68DBB342B83CF87606CBF3"
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+      "legacy_metadata_key": "859FCE97618BF2DB58D184DC53DE"
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     "extended_section_salt_hkdf": {
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-      "derived_salt_first_section_no_de": "A4B9B781D887945BA92FEB76E8240FC4",
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-      "section_salt": "5E811E71B15EEAA0B613F195FCB95030"
+      "derived_salt_first_section_first_de": "74F425482431EB42FF996BAC1A227F0F",
+      "derived_salt_first_section_no_de": "CAC0DBDE04AB7B70FBF8A40E18814286",
+      "derived_salt_first_section_third_de": "B751EC2415541106D79351A34AA5D2DC",
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     "key_seed_hkdf": {
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-      "legacy_metadata_key_hmac_key": "AEB4947DC3642F26A4FF341FC9229C354DED3A968871A9D61C3D1839D8546CB7"
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     "legacy_adv_salt_hkdf": {
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-      "expanded_salt": "3AD4FA385A84003E50DADF8DE60A52B3"
+      "adv_salt": "2CF1",
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     "legacy_metadata_key_hkdf": {
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-      "legacy_metadata_key": "F55F46D9207EF8BC9CACC178C623"
+      "expanded_key": "B04A6E310A7D824C2ECBAC27C078CF20",
+      "legacy_metadata_key": "2E262ABE8F4651CE3875F82BBF18"
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     "extended_section_salt_hkdf": {
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-      "section_salt": "3712E4ED118DF53D72B10E3D01ADD0DD"
+      "derived_salt_first_section_first_de": "A36E49ABD02685DAC38CE1D19D0B8B9E",
+      "derived_salt_first_section_no_de": "D531C60F8CA7C63115E838F71519894F",
+      "derived_salt_first_section_third_de": "722AD6D5D32103BE533568A2C3903320",
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     "key_seed_hkdf": {
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     "legacy_adv_salt_hkdf": {
-      "adv_salt": "6842",
-      "expanded_salt": "EFC5CFB4DF37EF1E049063D172039C81"
+      "adv_salt": "8CA2",
+      "expanded_salt": "49637910997ECD98BC7F3190BAB36A4C"
     },
     "legacy_metadata_key_hkdf": {
-      "expanded_key": "4382CD6D53BEB83DBD371AD2477AD0F3",
-      "legacy_metadata_key": "F3725522AA445F95FD162648CE9E"
+      "expanded_key": "BF435149C0B6A7FA723E18855A5D02B2",
+      "legacy_metadata_key": "96FD3B89B68B0B14A3781DDF9538"
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     "extended_section_salt_hkdf": {
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-      "derived_salt_first_section_no_de": "AE7E6C041F6AFB5DC9799F91FE56B3CB",
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-      "section_salt": "6E0E14CEA77863077814E05035A48107"
+      "derived_salt_first_section_first_de": "DCBBEE3140866817D5B3E64BF6AFD60F",
+      "derived_salt_first_section_no_de": "C7DBA60E81BB4A0F806B82F9DD4DE170",
+      "derived_salt_first_section_third_de": "00C8B3CA67C7C566A850C3E17B7E3A29",
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     "key_seed_hkdf": {
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-      "legacy_metadata_key_hmac_key": "5E735017BAD4DCA69D3FA9EFFAD47444FD15A408331D0533A4A0AEB4DD3C7CAF"
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+      "extended_unsigned_section_mic_hmac_key": "38350921EF19BA63EA5D6A5511230EA652628101961EA4504A597C5FE4510591",
+      "key_seed": "3836F8FDE174BAA5BFCE8F199CD45AF774C245312F90939B6D6FF51892F5C549",
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+      "legacy_metadata_nonce": "5A9EC7E213B30C88FB1F32BC"
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     "legacy_adv_salt_hkdf": {
-      "adv_salt": "21F7",
-      "expanded_salt": "1109B54B172496E91186918C0C8D317C"
+      "adv_salt": "EE17",
+      "expanded_salt": "D206579E8B5DA9132DBF4D1582A846E5"
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     "legacy_metadata_key_hkdf": {
-      "expanded_key": "F0599DF66569B92A081C23F8385FB4F3",
-      "legacy_metadata_key": "FBE565766E589867E66F7709290C"
+      "expanded_key": "BECFD5FC4083874524BD1E5A11A15CEF",
+      "legacy_metadata_key": "FD47DB9B922B170C9332494805DB"
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     "extended_section_salt_hkdf": {
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-      "derived_salt_first_section_no_de": "D18EB27E9E4B29CBCDDAE198BCD218C1",
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-      "section_salt": "4AC88177868088EB39DFF812C22A6291"
+      "derived_salt_first_section_first_de": "BE32AD26A190F96FC445AABBCB1CE959",
+      "derived_salt_first_section_no_de": "8F061686BF5B1411A332C523C4E0A209",
+      "derived_salt_first_section_third_de": "232C9AB5D992F3411339C60540915063",
+      "section_salt": "8C2DCAFB7C90877729124D34A7D5B6E5"
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     "key_seed_hkdf": {
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-      "extended_unsigned_section_mic_hmac_key": "07E5909FA45AB0A802370A118E0FADEDD86E6D4C0B5A5AF4725B7D9C8EF05131",
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-      "legacy_metadata_key_hmac_key": "CE2F1EF12F73E5321D1D5FCDAF3E9A508EA574BEDA4F410F4546945BA05A4DAE"
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+      "extended_signed_section_aes_key": "DBAABCE45273B37FD68B63B6957E5785",
+      "extended_unsigned_metadata_key_hmac_key": "E177B64123EFE628A6268D943BB7824EFF52212CACF2E3F59C07E165E4F16637",
+      "extended_unsigned_section_aes_key": "B085C6252DC18DCD41D7F83A28071565",
+      "extended_unsigned_section_mic_hmac_key": "32CD283375EF7007BA71BA8540A8AA91A05AFD714FE80809A9F92F0754F3CC72",
+      "key_seed": "2E489B259C0566C778FA0ED37E2E7FA41DF3A664CAF4EF875A4427EDB479BB23",
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+      "legacy_metadata_nonce": "A6A810AA0DCBD8FB7C957713"
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     "legacy_adv_salt_hkdf": {
-      "adv_salt": "D4BD",
-      "expanded_salt": "9A63AC812ED4D7DBAC1C706A4127EF91"
+      "adv_salt": "76E3",
+      "expanded_salt": "DB8C04B9A21DCCEC75C4D2C7806F57AE"
     },
     "legacy_metadata_key_hkdf": {
-      "expanded_key": "48825E4A22099853F67EB1E269DECDDC",
-      "legacy_metadata_key": "4683D3A45D2A5C45EABF302A799D"
+      "expanded_key": "0243B20CDF5D6EC2B5F40DE90BD517C6",
+      "legacy_metadata_key": "10D3F1C4B9422B343140B77FC230"
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   },
   {
     "extended_section_salt_hkdf": {
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-      "derived_salt_first_section_no_de": "76A506518A7718B1B20D93387C3C942A",
-      "derived_salt_first_section_third_de": "C95D82F3B223FF4DBE9CABA1BD8B3F25",
-      "section_salt": "7BFAD3C485A1571463AC9861A72A8B9A"
+      "derived_salt_first_section_first_de": "CC2F52EBC86DB28E36451CDAF13079E4",
+      "derived_salt_first_section_no_de": "DF2CF0AF9608449FBD2545BEBE111B51",
+      "derived_salt_first_section_third_de": "0B60FF977CD4A5D900642F660C496EC8",
+      "section_salt": "3D36E649B2617F943C57E5845043BD7B"
     },
     "key_seed_hkdf": {
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-      "extended_signed_section_aes_key": "BB9B7C23786488E09F5C48F1DF58D5D7",
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-      "extended_unsigned_section_mic_hmac_key": "DC82C8072762A77D272B6A747F4F88798DB946CE57D5CB5C0418209FACC6FE91",
-      "key_seed": "D9DC3AD6E363227795EE55DAAB84B3ACCE5BA3179ABFE908FA80998F37D8A1C8",
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-      "legacy_metadata_key_hmac_key": "9286024093AA70647D85900B31FD546257F5B034050FBA641A9710079E6D0EAD"
+      "extended_metadata_nonce": "92124C3375F66E88EFE35C53",
+      "extended_signed_metadata_key_hmac_key": "A0D58D77AF063A719AF9FF4EE9073C16B9BE7624AAB46951032E2DCA7E58F9A9",
+      "extended_signed_section_aes_key": "2B11051C494B15EFF095B1CE27731780",
+      "extended_unsigned_metadata_key_hmac_key": "0DAC827E8E114BE7A5377C68A902C3F9F9ADAA3799DCAB115B4402D6986B6693",
+      "extended_unsigned_section_aes_key": "9EBE28389C5D4037FE9CE66E5815318A",
+      "extended_unsigned_section_mic_hmac_key": "575A04282694E59058B0B62D8EE68F9F97063EB4CAADBBBBDD49CCD58C00AF3A",
+      "key_seed": "0A188883B6CA017E98A98E6F25D090AD8B59432D5978D9B54F41A7E4F60BD880",
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     "legacy_adv_salt_hkdf": {
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-      "section_salt": "277778C7D91A67393BE2DAB449B9935A"
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     "legacy_adv_salt_hkdf": {
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-      "legacy_metadata_key": "3BD53635D9B49E8C639D13D1A2FE"
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-      "section_salt": "FBE907EAC01C4FF8AC0A406FEF716882"
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     "legacy_adv_salt_hkdf": {
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     "legacy_metadata_key_hkdf": {
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-      "legacy_metadata_key": "D2C918A5FFB49343171C4529564F"
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-      "section_salt": "0B98A76C861D9365FA51428AED2834E2"
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     "legacy_adv_salt_hkdf": {
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-      "expanded_salt": "81E13245C2EEE6124603C4FE4C22035A"
+      "adv_salt": "587E",
+      "expanded_salt": "D3CDEC97B00233FD542022C2EB5F3848"
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     "legacy_metadata_key_hkdf": {
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-      "legacy_metadata_key": "2F2EB44729F3A6B41B3324B4B672"
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+      "legacy_metadata_key": "F9664E87F9E82683417A6C69FC6A"
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     "extended_section_salt_hkdf": {
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-      "section_salt": "78CCAC8E9F3B6D26A75061FB2894EC7E"
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+      "derived_salt_first_section_no_de": "B3E7AA07BD4FAFB10015CD6C196E067C",
+      "derived_salt_first_section_third_de": "4D84FFA3D9A34766CCBD37DF356A9FFC",
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     "key_seed_hkdf": {
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     "legacy_adv_salt_hkdf": {
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-      "expanded_salt": "5618B98B5E6F4F96148D26DD7A0DB008"
+      "adv_salt": "9288",
+      "expanded_salt": "EB04D1DB34235FE2814ABE28338AF6BD"
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     "legacy_metadata_key_hkdf": {
-      "expanded_key": "62AC384643E0F1BFA17FEB61AA9734D6",
-      "legacy_metadata_key": "7C8CF959BC8F902B839A104FB14A"
+      "expanded_key": "E1478A4ABBA0D34E1DBB8440636BA1DE",
+      "legacy_metadata_key": "3B2669DBE04D22E4146856F24964"
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     "extended_section_salt_hkdf": {
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-      "derived_salt_first_section_no_de": "0A4E33216E0596B53BD196FA045DCCEF",
-      "derived_salt_first_section_third_de": "63EED51E786CE44976D6559373AC7FB9",
-      "section_salt": "C53CC23428DB48887DB27668433838AE"
+      "derived_salt_first_section_first_de": "2315A6A6A255AFDF9CB9BC23D7481C70",
+      "derived_salt_first_section_no_de": "2F871D368ECA88997CA4EA877F8BCDA1",
+      "derived_salt_first_section_third_de": "F4D547600C7C3CC1ECEB4D83C821D191",
+      "section_salt": "D82414D60C56BC7571AC11EA22FD95A1"
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     "key_seed_hkdf": {
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-      "legacy_metadata_key_hmac_key": "650404FBCA47876A8282AEE3B33AE601EE94905B969487EF4622AD62E8EE55B0"
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+      "extended_signed_metadata_key_hmac_key": "8F2D19779DE3D0BD45A93F9D546C7D70BA7D24A3039FC10FBED142099A7E48B0",
+      "extended_signed_section_aes_key": "552CF2D3F72D8AD6AE4613521D744069",
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+      "extended_unsigned_section_aes_key": "E915FB586132C17710BDDBBC7BE734D3",
+      "extended_unsigned_section_mic_hmac_key": "00FAB34E3EF9BABCC38BB24476583539C41F2C0CA69FBCD21C278742108158B2",
+      "key_seed": "B835493E7A34BA1C0ED885CF78EB30CED4203067CFB0E3501CF1509C44A10EA4",
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+      "legacy_metadata_nonce": "BBE949BBD59C4F963E7E2821"
     },
     "legacy_adv_salt_hkdf": {
-      "adv_salt": "0E06",
-      "expanded_salt": "95B27BC0998229DC12D28D2FA1C04E0B"
+      "adv_salt": "54C1",
+      "expanded_salt": "0DB76FBA8F6AC46D1C0E4D3BF4F9760B"
     },
     "legacy_metadata_key_hkdf": {
-      "expanded_key": "BFEC8A2E9F616C508DF187E9DF1FDCB4",
-      "legacy_metadata_key": "5782D727F4170569BA8B3595EA07"
+      "expanded_key": "6815ACAD17F576FCFAC31D7CA348B9C7",
+      "legacy_metadata_key": "D56BC285FCBC28F14904C110D022"
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   },
   {
     "extended_section_salt_hkdf": {
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-      "derived_salt_first_section_no_de": "86444D31AE12E32B9A21BE78C59CD681",
-      "derived_salt_first_section_third_de": "1285FC3465CA99704ABFB3D44DAA14A8",
-      "section_salt": "0DA17E9CB114F1A016C00A593C1D606E"
+      "derived_salt_first_section_first_de": "A63D90F8D31E70B5F12FA49567853940",
+      "derived_salt_first_section_no_de": "DBA2B7268B2EDFCE658C2DF7D1F50E18",
+      "derived_salt_first_section_third_de": "923531B496A572D8E6C45ECDC3598D78",
+      "section_salt": "228003CED4DE76F9E2E12998C3ACF2ED"
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     "key_seed_hkdf": {
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-      "extended_signed_section_aes_key": "765A015D81E3A2C80B81189C8C241BC5",
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-      "legacy_metadata_key_hmac_key": "449D821E637BAE959E8A440A0384811EAD2E46A1D530BBF09F1DEE4750A5BAE5"
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+      "extended_unsigned_section_aes_key": "9DDB1E227FD6E4F9FA7D29BB7A5A1C4F",
+      "extended_unsigned_section_mic_hmac_key": "9611D448338D20F3C6A6464C9CBE3841CD703E6FCBEBAC5EB44D3F5F5D6997B4",
+      "key_seed": "D116B27178BB5F9D9979CBAA97159E4D4410DE3D26CE2AC3ABA7BDAB63A6B85B",
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     "legacy_adv_salt_hkdf": {
-      "adv_salt": "25A7",
-      "expanded_salt": "1001DE18025793685807174644F915E7"
+      "adv_salt": "A386",
+      "expanded_salt": "F59E3504B2B86D465989D0F5B5F04E7A"
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     "legacy_metadata_key_hkdf": {
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-      "legacy_metadata_key": "FC706D382F05CD979DEC53A87354"
+      "expanded_key": "D4522DEB87180CBAD14338BCF3B1107E",
+      "legacy_metadata_key": "F1A6EEEAEFD437330DFB706FBC43"
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     "extended_section_salt_hkdf": {
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-      "section_salt": "4544A62834D40793B790B41E0E2E8CE5"
+      "derived_salt_first_section_first_de": "06C173FF92776658E2DB2394907E31C7",
+      "derived_salt_first_section_no_de": "CC2D079DF426A5359DB15CF4DF6C894D",
+      "derived_salt_first_section_third_de": "5FD567F78807129F25151725F939CA7A",
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     "key_seed_hkdf": {
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-      "legacy_metadata_key_hmac_key": "9616DC43B57AA994E028A5AEA1F877EE47805E729FBC860101981C14863D7457"
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+      "extended_signed_section_aes_key": "EA0D9B928C271079D8DE740792217A2E",
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     "legacy_adv_salt_hkdf": {
-      "adv_salt": "7D14",
-      "expanded_salt": "B1705F907083DA214FEC3CCF2DFF8F9D"
+      "adv_salt": "1161",
+      "expanded_salt": "CAFA25E3F8E00053BC3825E8FF5D5078"
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     "legacy_metadata_key_hkdf": {
-      "expanded_key": "920DC80626FA0C6A4E4C401917C6D2BB",
-      "legacy_metadata_key": "CFF499042A005510A4019F804E0C"
+      "expanded_key": "D918D076ABA54A6B7FB5406522616208",
+      "legacy_metadata_key": "6C7A1A6D9A337FD3FE62B2E2ADF9"
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   {
     "extended_section_salt_hkdf": {
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-      "derived_salt_first_section_no_de": "A3ECCF0CE7F4EC3D7333BF6EAA43FF75",
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-      "section_salt": "3077BFDC668DF7FE3354CED1F2CDE565"
+      "derived_salt_first_section_first_de": "D2C405851BBC1268709BCA5E92ACB57B",
+      "derived_salt_first_section_no_de": "8F84A4AB6444AFD08FE7110D0D16C74D",
+      "derived_salt_first_section_third_de": "4C3C84632D69672E8921C5067A7DFB56",
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     "key_seed_hkdf": {
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-      "legacy_metadata_key_hmac_key": "93448155FB18A7582571E50BCE555326CF2CFCE8E58E6CA7474DC83FD5B2E0AB"
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+      "extended_unsigned_section_aes_key": "1CEC9AA427A98480A6642003700F4A5A",
+      "extended_unsigned_section_mic_hmac_key": "6780C7E76F1A85B3E31A1382505FE21BA04AAFE268C9810C626E72C9203C638E",
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     "legacy_adv_salt_hkdf": {
-      "adv_salt": "A320",
-      "expanded_salt": "ED263552503D6A468A1BE9A03B2504CA"
+      "adv_salt": "F836",
+      "expanded_salt": "F8809BFDD69EE831A7686D8359BBBAE4"
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     "legacy_metadata_key_hkdf": {
-      "expanded_key": "51A63F59DA49306D590549761A87F057",
-      "legacy_metadata_key": "4AE77EE6F131EB3109BA9C91FC24"
+      "expanded_key": "A97B037072AC4D59472E20AE1C8688CE",
+      "legacy_metadata_key": "4E18A6F5EEDEDFAE9AEE43A53094"
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     "extended_section_salt_hkdf": {
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-      "derived_salt_first_section_no_de": "DBD0500B240828F9BACA69AB2EC2DB3D",
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-      "section_salt": "A8AD1A2760C281658293991BED24B74C"
+      "derived_salt_first_section_first_de": "146332F0DF9B6701D5F6ED9173B966D7",
+      "derived_salt_first_section_no_de": "CA5CEB6D8BA41402859B0706E603C25D",
+      "derived_salt_first_section_third_de": "E93B2C310878FED27F89298CA9F77731",
+      "section_salt": "EB9DA18BDB815DBF4BF9906E8AAFB491"
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     "key_seed_hkdf": {
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-      "legacy_metadata_key_hmac_key": "B46E96D71FFE9D836804C83A25ED6A2763F732BB87C378C38594BE11E47AE606"
+      "extended_metadata_nonce": "588AB130BE0197CBF1E240AB",
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+      "extended_signed_section_aes_key": "FDFA11ABDAC005CD0C6DBAFE22CB84F5",
+      "extended_unsigned_metadata_key_hmac_key": "A8ABEFCD7AF7D09F7862E825FC5D641A23CF32210676F1CB8AFD375F180DE059",
+      "extended_unsigned_section_aes_key": "895814EEFA0514080381B2466C5560DF",
+      "extended_unsigned_section_mic_hmac_key": "770CD91393852E19BB1A5878B8BDA5E4B9AF9A0640856804C470EDE355DB0914",
+      "key_seed": "519521C296DA4C8A13A47835506AA306C9782F3F1C946D061616CA248E64CD9E",
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+      "legacy_metadata_nonce": "F0392AFD52B25E66D0D16B50"
     },
     "legacy_adv_salt_hkdf": {
-      "adv_salt": "C826",
-      "expanded_salt": "BF13548F8C621B59770F05D870305548"
+      "adv_salt": "AF9B",
+      "expanded_salt": "488FC6BDA553D9894C6C397E009D56F9"
     },
     "legacy_metadata_key_hkdf": {
-      "expanded_key": "56D50B97F258DFD757DC1D5685CDC3D2",
-      "legacy_metadata_key": "FF678C0893D2D8D7EEB163D316FC"
+      "expanded_key": "AF67A28D0088401BE912DFF010C7CD2B",
+      "legacy_metadata_key": "0A0692A83815A72C28C2E1A0C324"
     }
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     "extended_section_salt_hkdf": {
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-      "derived_salt_first_section_no_de": "3210DF371ED0A11E0E4DFB81C270A5F2",
-      "derived_salt_first_section_third_de": "51AACC038CD438AB820FEB0D9FD47FC6",
-      "section_salt": "90632FB33ED905F4661BB042A17ABEF5"
+      "derived_salt_first_section_first_de": "B57FD4C4A95B5FA80E77FB0A4342B558",
+      "derived_salt_first_section_no_de": "804C7287DBC4705759D1543D3BB19796",
+      "derived_salt_first_section_third_de": "185B5BE5742AF28DA4D9BA8FFDC8E609",
+      "section_salt": "1D6723044D269740F2E422789242AD4A"
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     "key_seed_hkdf": {
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-      "extended_signed_metadata_key_hmac_key": "9BD1C49DB3187A25CB3655B7F37957BC3A508A1B4BC756149C201DB4CD67B5D2",
-      "extended_signed_section_aes_key": "F74A2FE4B3FCB7162EDE191DA30AB766",
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-      "extended_unsigned_section_mic_hmac_key": "F7FC5A5C5BE1FEFE7CFC07DF039FD64A06A48481A02FC3D50A2E29563B1D172B",
-      "key_seed": "68B17DBC92498AD7DC80900A9179AC976E28F0E9C55BF70A0330AF54002DDD8F",
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-      "legacy_metadata_key_hmac_key": "609F6AFAD9B0D4353396561DA23D37D9A2E8B165CBA39F0F15938202D26951F9"
+      "extended_metadata_nonce": "E4EDFA97754C39393AEEF09A",
+      "extended_signed_metadata_key_hmac_key": "AE6C660ACBE3D637F9D01CFB4EA927FF4B1DEB1446EB096688BCB54F5C1A5389",
+      "extended_signed_section_aes_key": "DC58AF65EDAB2BDB393DDD7033F781CD",
+      "extended_unsigned_metadata_key_hmac_key": "578C17FC68D03B2A9FFA8352C4ECD9D15DE2F97B5500DB4A9FEE70A93E28AD2D",
+      "extended_unsigned_section_aes_key": "573CC36574396A27D5CD12DE72470637",
+      "extended_unsigned_section_mic_hmac_key": "9D8CFA87DB083EF2FC4C495E6A7E3F8483C608A186AC9EFB6C22144B4A654034",
+      "key_seed": "A34102D098DBC12FBAAFAC0DE0F0959450DF888C7323AF55CF04B976E6B9152C",
+      "legacy_ldt_key": "78065CCC471C92F1328DF45AF7180DCF3073A56F599B861706DB9691DEE1580AAC1FBE1215CF24AF403A0BEA04E27C87E91E24DE63CB61C35576326B32A50F97",
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+      "legacy_metadata_nonce": "889DB55C293C1227BCFA48AB"
     },
     "legacy_adv_salt_hkdf": {
-      "adv_salt": "68E5",
-      "expanded_salt": "A8C9676F80BD1CEF5B10102AC4E09618"
+      "adv_salt": "4644",
+      "expanded_salt": "8E7143D60063DC6AFF6A285C0CAED64A"
     },
     "legacy_metadata_key_hkdf": {
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-      "legacy_metadata_key": "59565A4BA64A758318FC2411644C"
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-      "section_salt": "C4EE68A6CB7636CCAD1474CBF3BAA916"
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     "legacy_adv_salt_hkdf": {
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-      "legacy_metadata_key": "9104A5DA1BC3168DB11EBF59DBD8"
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-      "section_salt": "296639A30006771BF7DFC70FEB0CAED2"
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     "legacy_adv_salt_hkdf": {
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+      "adv_salt": "42AF",
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-      "legacy_metadata_key": "4990779D28E61B9F2A7A82A8D3F5"
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     "extended_section_salt_hkdf": {
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-      "section_salt": "57EF0E9229ACEFEEBB2E6ABDF4765019"
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     "legacy_adv_salt_hkdf": {
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-      "expanded_salt": "4CEDF4787968E0686B53BE2882C1D939"
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     "legacy_metadata_key_hkdf": {
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-      "legacy_metadata_key": "DB37799A802ED605CA34FF0366DB"
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-      "section_salt": "FCCB5D9CEE6AFCF0D28D4B299ADB8440"
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+      "derived_salt_first_section_no_de": "A23C5D2DB650AD57227C15A86F1BF40E",
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     "legacy_adv_salt_hkdf": {
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-      "expanded_salt": "76A04B364EB7A8D434B4238B5F383B41"
+      "adv_salt": "F2D0",
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     "legacy_metadata_key_hkdf": {
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-      "legacy_metadata_key": "A0D31F9E96B4BDE78E5C62D9DA54"
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+      "legacy_metadata_key": "D6C78751DF42B853DCB42F723B6D"
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     "extended_section_salt_hkdf": {
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-      "section_salt": "E92AED4669EABD0425F55A95A6994659"
+      "derived_salt_first_section_first_de": "F6AF11DAE90B198388EA1D778C10CA4A",
+      "derived_salt_first_section_no_de": "3AEC2DD5E0D29A9EE0DE8B6C00DB2285",
+      "derived_salt_first_section_third_de": "29C1901D0646729360364695E47F59AA",
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     "key_seed_hkdf": {
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-      "legacy_metadata_key_hmac_key": "B8A4B5324ECBCBAFD192A356C3FB29D2B0D5B03BA3E600DEC5187E5ED397F32D"
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+      "extended_unsigned_metadata_key_hmac_key": "E975F5B3AF3C931B94F7D7ABD332BA9AF8C40F822BFBE93685714E49FA34BE81",
+      "extended_unsigned_section_aes_key": "B9E68CEA1E1836ADA1C2B6F72F19814E",
+      "extended_unsigned_section_mic_hmac_key": "9054020C39D0AC975FA1446386B282FBA102D3B13B94E06751182223E8BACD20",
+      "key_seed": "92CC48D1E46FD37FD8D92063C275E5601F7956B1D79EB4DA6406989177F795E6",
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+      "legacy_metadata_nonce": "CAD17CB88CBB262FA2648FAA"
     },
     "legacy_adv_salt_hkdf": {
-      "adv_salt": "CD61",
-      "expanded_salt": "9FEDE3601292F72594E92DAC4A711966"
+      "adv_salt": "2760",
+      "expanded_salt": "ACE0FB227A299B29532B691723192E4C"
     },
     "legacy_metadata_key_hkdf": {
-      "expanded_key": "69C898A6A277E88D5D64F35121291EBC",
-      "legacy_metadata_key": "54CFF959FBBC0B2CDEB97CFF02AD"
+      "expanded_key": "CECFCF062962713BF67A2C253C34C430",
+      "legacy_metadata_key": "514B537E9F65528BB70C726EAB75"
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   },
   {
     "extended_section_salt_hkdf": {
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-      "section_salt": "F4D6A5B2153470A69A5DE681F31F9C05"
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+      "derived_salt_first_section_no_de": "4AF7B282B09493FE2AB824CE11CF5A3D",
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     "legacy_adv_salt_hkdf": {
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-      "expanded_salt": "1A255ABBCDF9654A1993EBB82A3E5835"
+      "adv_salt": "FE58",
+      "expanded_salt": "9C7EA9924564F03D6340019D4BCBBA47"
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     "legacy_metadata_key_hkdf": {
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-      "legacy_metadata_key": "E1D0C8EFB76B4B18BE79E8DC9035"
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+      "legacy_metadata_key": "1F22EFEAA64F55866D64968A732A"
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-      "section_salt": "D17D8D478E5B033FCD5FF8C5F58AEB55"
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+      "derived_salt_first_section_no_de": "9F52A5DAA201CD3307BC80F9A3FF5A64",
+      "derived_salt_first_section_third_de": "BCC55DC7AD531D04D24F88CD03FC9947",
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     "legacy_adv_salt_hkdf": {
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-      "expanded_salt": "76FC92E801752A77DAD82883D87175E6"
+      "adv_salt": "9CC4",
+      "expanded_salt": "61B568A967985A5611EF9256E29E9894"
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     "legacy_metadata_key_hkdf": {
-      "expanded_key": "273E3A4EE5FDCDE2124CBD43317EFEC3",
-      "legacy_metadata_key": "8727F2AED267DC3E5BF3EFD53066"
+      "expanded_key": "D477CF6201CC1CADBA21370D16760F8F",
+      "legacy_metadata_key": "50841355894155E171A91BD507A7"
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     "extended_section_salt_hkdf": {
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-      "section_salt": "C2A2E1796ABCE73210BDC97FBF995E6E"
+      "derived_salt_first_section_first_de": "DCA35224242C81D062E2D7806C58D0B2",
+      "derived_salt_first_section_no_de": "54EF44DB16594004E554658EFA470231",
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     "legacy_adv_salt_hkdf": {
-      "adv_salt": "3ED5",
-      "expanded_salt": "39B400D649A4A745CBF27A7B47035ACD"
+      "adv_salt": "296A",
+      "expanded_salt": "F44EA8B30FD9F999BC7E31C8130892C3"
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     "legacy_metadata_key_hkdf": {
-      "expanded_key": "D3B149763E3EE8FEAD8EC111733FD10E",
-      "legacy_metadata_key": "16ED7B0D75664D96929A65FC5174"
+      "expanded_key": "4299BCBB2412A71215EDFBFE1F8176E7",
+      "legacy_metadata_key": "07C4A089310EACCA1B3BA2D4EA94"
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     "extended_section_salt_hkdf": {
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-      "derived_salt_first_section_no_de": "0E2671293887F02329DD299921F19AB2",
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-      "section_salt": "6736970D6E3BC5052562C41F170BED9A"
+      "derived_salt_first_section_first_de": "F3CAEB25DC97A317A38C99E7F1438E1F",
+      "derived_salt_first_section_no_de": "EC4686E3C2F9A5AF8934C8EADAFAEB6D",
+      "derived_salt_first_section_third_de": "921DBFBA6B75D60A97443F20A6AE5779",
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     "key_seed_hkdf": {
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-      "legacy_metadata_key_hmac_key": "C372225AAD48A5ADE3D13B888F59240D72DF0230A6D66E463666506C9C961E91"
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+      "extended_unsigned_section_aes_key": "84AF72363AC42837703E0233DA58AF15",
+      "extended_unsigned_section_mic_hmac_key": "309CEADE18269614513CC150680E07E79A395BFD00966021D074AA51D5DBB0B3",
+      "key_seed": "174C6D54B1B0CC84774E8FB9339AC57933CFEC2D78A57F66268A2ED648C79D54",
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+      "legacy_metadata_nonce": "0688E75E1B921F995491EB07"
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     "legacy_adv_salt_hkdf": {
-      "adv_salt": "AC47",
-      "expanded_salt": "AEEB6BF5AC68EA6C69098CDAFB771408"
+      "adv_salt": "BEB5",
+      "expanded_salt": "C401AFC676735287424E9F7F0DF237B2"
     },
     "legacy_metadata_key_hkdf": {
-      "expanded_key": "4F79E4223701491CA6C77FACD17D51FC",
-      "legacy_metadata_key": "D36C137C99A368ECF5B92507D688"
+      "expanded_key": "8AB09C04AC42D4F4E123FC884885C595",
+      "legacy_metadata_key": "191530A2A7F75BBDFD7777601AE1"
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   {
     "extended_section_salt_hkdf": {
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-      "derived_salt_first_section_no_de": "5D548892AC258D29A0DDEFB62F274423",
-      "derived_salt_first_section_third_de": "9EA1F64B754021805793A5E2433F5EE7",
-      "section_salt": "3D67E928DD8CF6CB3305C3C3315858E1"
+      "derived_salt_first_section_first_de": "99D022786E9CC9AB870AC2FF57DA80EB",
+      "derived_salt_first_section_no_de": "01E17F91C55F51BD79A72463BC8493F8",
+      "derived_salt_first_section_third_de": "AE2DCB3E34AB81BF22F460D7546376F0",
+      "section_salt": "3E1F652AE28F8335D7B15864E9F7CCF5"
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     "key_seed_hkdf": {
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-      "extended_signed_metadata_key_hmac_key": "93FB6962A30A4B064E0339FA4AB087F162EC877EAD19B4DF5896DA06F925557C",
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-      "extended_unsigned_section_aes_key": "E40330ACF25A8025EC937FEF61508425",
-      "extended_unsigned_section_mic_hmac_key": "EE4ECD68F0E6283CB6A46EEC18A119804FD031DE5011D874F18D32FC9F65B62A",
-      "key_seed": "12491A6B02C3FB406B108816802FBF127360D5AFB723769E36304CC74E2D5E22",
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-      "legacy_metadata_key_hmac_key": "4C88609AE3AC39C2D2C0DBD731BDA48DD3241EA64FE38F220C88DE6EA0324652"
+      "extended_metadata_nonce": "F3ABE0F91D65A95957CF2AD7",
+      "extended_signed_metadata_key_hmac_key": "0F4E56038ABF9ACAA73EC95395B337124A89ACC20399E1DBAB7F8F73182BC107",
+      "extended_signed_section_aes_key": "13B7FEAF3CD5ABF9905CDA55AFDDEFF4",
+      "extended_unsigned_metadata_key_hmac_key": "B42A14360C1128B0B4AA1D99E89B32F4D13D2C8A191EC5E58DB841EDDC4ABF76",
+      "extended_unsigned_section_aes_key": "3AE1FBA492CE6D8854923EEAC2AB8A17",
+      "extended_unsigned_section_mic_hmac_key": "9FF77BD8BF275AB41652950CE40976102A641CE5CBCF346A9E755281FC0259B3",
+      "key_seed": "9864ECFD656E7B608A63883FBEC4F62E8E6F7A3590114C39E036AEC87BECBE41",
+      "legacy_ldt_key": "8FC7B079C4225368931B03C4814EAB6DC02175EF1873B1A224CFD39B9CD99814417A884A2FDB9D324747F55A9BF7758B22C2C3113D06ADC373B0A47E925FADF3",
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+      "legacy_metadata_nonce": "B4245B6A65DA3B698B64B9B1"
     },
     "legacy_adv_salt_hkdf": {
-      "adv_salt": "31FC",
-      "expanded_salt": "2347B739031587FAC32D1CDAC07E2D5F"
+      "adv_salt": "8C5F",
+      "expanded_salt": "1E634D3633DB16B5698B53B1FAC7318A"
     },
     "legacy_metadata_key_hkdf": {
-      "expanded_key": "62B921983F1013469C9C70ABA6B01A06",
-      "legacy_metadata_key": "21883F0402647E744883EF716FD8"
+      "expanded_key": "ABACBBEA70871DA67332DAD622F9877E",
+      "legacy_metadata_key": "711C81AF55689C9F41F26EC0B3D9"
     }
   },
   {
     "extended_section_salt_hkdf": {
-      "derived_salt_first_section_first_de": "BA079252BAAA33749A234C5FA7790C96",
-      "derived_salt_first_section_no_de": "85A477C4A83CA27D3B34F508D20D8ED8",
-      "derived_salt_first_section_third_de": "B9F438DED09E0E012C9139F8758211F5",
-      "section_salt": "C9B5D48F58F3DB42DC74C09DF7127629"
+      "derived_salt_first_section_first_de": "D42F8611248F16803F100880FD2C40A8",
+      "derived_salt_first_section_no_de": "0AFD085C634D64812B22120E6EA087A2",
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     "legacy_adv_salt_hkdf": {
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-      "expanded_salt": "20BB9A87D6FD805B633F902422BB2D63"
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     "legacy_metadata_key_hkdf": {
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-      "legacy_metadata_key": "5602770C91B520CEF97EAF77A6BE"
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-      "section_salt": "44441E813E9B82753056174CE918DFAC"
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+      "derived_salt_first_section_no_de": "F4FA7DA6B4BEB32FB8D61AD5529221DB",
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     "legacy_adv_salt_hkdf": {
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-      "expanded_salt": "E5BBE1943864920FC0D18756F1EAC79C"
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     "legacy_metadata_key_hkdf": {
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-      "legacy_metadata_key": "34CC6F287F683973052AF4D4A5A1"
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-      "section_salt": "AE8DED295626BD432A72F1FD711B4399"
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     "legacy_adv_salt_hkdf": {
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-      "expanded_salt": "0F5E5D24D68D55E40224D9B794E59428"
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     "legacy_metadata_key_hkdf": {
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-      "legacy_metadata_key": "B3E994C744F4FB9CFC6505B85407"
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     "extended_section_salt_hkdf": {
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-      "section_salt": "AFE3F8E6C7CB466E3D24C9B627BD03E6"
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+      "derived_salt_first_section_no_de": "D1375663E1B57A43DD17E6FFAFC17279",
+      "derived_salt_first_section_third_de": "2EFF6AC282F726CA937B8B9AEED2B9FA",
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     "key_seed_hkdf": {
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-      "legacy_metadata_key_hmac_key": "21311915BF12DF0CA89F2B6AF0EA9CA21E7579EB95E8BFB9353EAAB984A129DC"
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     "legacy_adv_salt_hkdf": {
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-      "expanded_salt": "E04DB8DCDEF5454AAB794168647F3116"
+      "adv_salt": "4E36",
+      "expanded_salt": "D96E799C1F673C3AB5621DE38FB7D9FE"
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     "legacy_metadata_key_hkdf": {
-      "expanded_key": "CA6776187744D498143D2B65F2BCB620",
-      "legacy_metadata_key": "411866E3047FB22E19A49182404F"
+      "expanded_key": "DC4C0824F5965E110BE7C9036B6043D2",
+      "legacy_metadata_key": "D2DE6C51A1B2F0CC740A0433BA0C"
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     "extended_section_salt_hkdf": {
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-      "derived_salt_first_section_no_de": "67B90D606605DAFA7766050706519FDC",
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-      "section_salt": "4EAABF9C04B256119C6ADF9EAAB011B7"
+      "derived_salt_first_section_first_de": "D735F933C91F70E6703FA277DD9D6B07",
+      "derived_salt_first_section_no_de": "A1216FDE48D4E7CF716EBA6304B0E002",
+      "derived_salt_first_section_third_de": "6C6F84F7B0ADB3DC95733154462DC464",
+      "section_salt": "EE077330D38FA4E741EEB2A423C44E16"
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     "key_seed_hkdf": {
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-      "legacy_metadata_key_hmac_key": "8B18E541F6E8DEB8AF3D5F8023E10EE035CBDD4E026832B6D20E1DB299ADD277"
+      "extended_metadata_nonce": "E8591F5F7A4A9BEEFD11704A",
+      "extended_signed_metadata_key_hmac_key": "0D06ED71FA2DAF112A89EBA86E42961C0CCF5F114C9D5414221ACAB16493615A",
+      "extended_signed_section_aes_key": "5DCDDA469454FEB3C2EA71021F93C392",
+      "extended_unsigned_metadata_key_hmac_key": "770A74886ECB2E13C09DA386048A1FFDD32F184821CFABF97C591F2F1AF593D9",
+      "extended_unsigned_section_aes_key": "74093EBAD21C75C9FB6496AB55D71D10",
+      "extended_unsigned_section_mic_hmac_key": "528D1D684E3DBB6A55B3C74B76F12E3BF88F622796E111436F8436F9C68BD7AB",
+      "key_seed": "CB62878D769D49414CD07AB82DD01A567BD320BCDFE120E137EA6D24FD754A31",
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+      "legacy_metadata_nonce": "6A2FC44C5DCC8ECE690470BB"
     },
     "legacy_adv_salt_hkdf": {
-      "adv_salt": "293D",
-      "expanded_salt": "FF95CFBA8AABAC3C07C661BC3A214DB2"
+      "adv_salt": "4B93",
+      "expanded_salt": "0618681E330AA95ABCF5908C7D80266E"
     },
     "legacy_metadata_key_hkdf": {
-      "expanded_key": "1C2057DB0FE26B2BE41E5B601365879D",
-      "legacy_metadata_key": "4FBD487DE4CD5C504947E77CC9F9"
+      "expanded_key": "176853A104A7E84FB244044ADB23E60B",
+      "legacy_metadata_key": "AD1ADA1E3F33D44DBAD9D68546F8"
     }
   },
   {
     "extended_section_salt_hkdf": {
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-      "derived_salt_first_section_no_de": "041CAE2EA460C65E11FDE0B39EE2C454",
-      "derived_salt_first_section_third_de": "75700EB4C7996590A1011D14A895B38D",
-      "section_salt": "6B2C8039FEAB14E8BE54A329A4CA4EE8"
+      "derived_salt_first_section_first_de": "1A605E7282BBB65E768BA802674316E4",
+      "derived_salt_first_section_no_de": "46EDD6B928BC45D5349843C3DA660A46",
+      "derived_salt_first_section_third_de": "23866A17B31C30E4B6BFCE65FF9EF2DD",
+      "section_salt": "CF0811E9E51806ED2EC869D2DCF7C3DD"
     },
     "key_seed_hkdf": {
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-      "legacy_metadata_key_hmac_key": "E0867ED7A2AEF85C7DAEDE681249E34136ADA175289E2D800120F7BE6FBF914A"
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     "legacy_adv_salt_hkdf": {
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-      "expanded_salt": "4A9ACA41D9738ED18A3FF5295CC9430E"
+      "adv_salt": "3CF9",
+      "expanded_salt": "469C89FF0AFE6B7AEA5A94E8E5D413EF"
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     "legacy_metadata_key_hkdf": {
-      "expanded_key": "E8AF6D225FE1B289C6A720C25F67E96E",
-      "legacy_metadata_key": "BFE9FC191980DF5697D0838F7DC8"
+      "expanded_key": "34C8733D5598224EBE7E0F468AC42AE0",
+      "legacy_metadata_key": "B4EBC9A698A9F67B3360AB444B65"
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-      "section_salt": "D1E12007BD5FB093044099990C0CBE07"
+      "derived_salt_first_section_first_de": "6C0B7CAAB6B77D7E69927BEC4CF9857D",
+      "derived_salt_first_section_no_de": "E85B82E53864343FE2E11C3BBA921BE8",
+      "derived_salt_first_section_third_de": "B5C9E52B81072C158A44DA3D0F1B863C",
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-      "legacy_metadata_key_hmac_key": "540EB00BCAD9C3458151FEAD75C566AF3FA5FD59D8465BE30BD0044BF3433170"
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     "legacy_adv_salt_hkdf": {
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-      "expanded_salt": "D6EEF1589F3246FCBA21199F3540B5F2"
+      "adv_salt": "651A",
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     "legacy_metadata_key_hkdf": {
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-      "legacy_metadata_key": "0C1628F8AC04A8A637679362D14D"
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+      "legacy_metadata_key": "0224F2C3F01DF3961A9DDB33D33F"
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-      "section_salt": "06424D600A0B9492D03BF0347ED4669D"
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+      "derived_salt_first_section_no_de": "9ECDB554F3EF801381DB9373B9886BFB",
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+      "extended_unsigned_section_aes_key": "3A50203C921E126E8D1B0A31660E025D",
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     "legacy_adv_salt_hkdf": {
-      "adv_salt": "3B48",
-      "expanded_salt": "793BEB98C434CA53A37B5717A7131D61"
+      "adv_salt": "C854",
+      "expanded_salt": "7F509331897315561AE87E8E465731D5"
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     "legacy_metadata_key_hkdf": {
-      "expanded_key": "4AED6A93858EF58AD7A58AFAD048B893",
-      "legacy_metadata_key": "392D05BAB03F1C96863456CFF3C5"
+      "expanded_key": "445F1AC997B6F6258C04D6612730F576",
+      "legacy_metadata_key": "5A0395FCA63385D863B94C161830"
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     "extended_section_salt_hkdf": {
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-      "section_salt": "C07E6600335583170833F1222DE02B82"
+      "derived_salt_first_section_first_de": "C5D4701E3941FA12EBDFE7EAF8D1103D",
+      "derived_salt_first_section_no_de": "CA9740A690C83B28BB8EB6C99A28471B",
+      "derived_salt_first_section_third_de": "0C2ACC54B8EB3433574E87CC03090508",
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     "key_seed_hkdf": {
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-      "legacy_metadata_key_hmac_key": "3A9F56EA3A110D23DC212FB201842B5C094D2F8DB85E82BB4E0E325427B025FF"
+      "extended_metadata_nonce": "2AE39BFE66BFF7F3685B7FFC",
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+      "extended_signed_section_aes_key": "59A55BB848376BB2A1F2212E954743C4",
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+      "extended_unsigned_section_aes_key": "4B6F0EA5C9C9A1DBC1203B0B5AA1D81C",
+      "extended_unsigned_section_mic_hmac_key": "D5B603436CA006324D83AE5020DAC7BD98F9E05EF3E94BA41F63558E2282FED2",
+      "key_seed": "0982F189CB2F763A17D3D68430CA8DE5C22D6B44C21881CF76473C21F4CF573F",
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+      "legacy_metadata_nonce": "3BBD17F0F4C43E279C69A7E0"
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     "legacy_adv_salt_hkdf": {
-      "adv_salt": "4F0B",
-      "expanded_salt": "F9006FD5D3297143374963F99A15D136"
+      "adv_salt": "065F",
+      "expanded_salt": "1360903389867A3F865080EE99218A93"
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     "legacy_metadata_key_hkdf": {
-      "expanded_key": "268F059EDB52AA81DF7B3FC93A9B4628",
-      "legacy_metadata_key": "BBC70BCBB8FFC2B56A20D96288A2"
+      "expanded_key": "13D9CD7AB4481EC78AAE713AC7F7A534",
+      "legacy_metadata_key": "13A49EE19095CFD061978BE2DA07"
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     "extended_section_salt_hkdf": {
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-      "derived_salt_first_section_no_de": "812BA22EC8684CA75319E08DB855324C",
-      "derived_salt_first_section_third_de": "E0D55EDCAFCBF707697C16D47B223C9F",
-      "section_salt": "51F1B0CF181FA016C60E408A898548EB"
+      "derived_salt_first_section_first_de": "5809826FE4C41311D0DF8490071E4BA5",
+      "derived_salt_first_section_no_de": "B10FE9FE08BB71AAEF17701E3805E337",
+      "derived_salt_first_section_third_de": "5C8C4CFD85E659D2CCC0A735E4C14C44",
+      "section_salt": "C1290354344488D39DD88998567BFA1E"
     },
     "key_seed_hkdf": {
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-      "extended_signed_section_aes_key": "77B3509296F88DE04E1CD0C1103587C1",
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-      "extended_unsigned_section_mic_hmac_key": "13B512FE157BF08D9E05774F592ACA12D30E0F54A374968E7A969869266EE750",
-      "key_seed": "311DC430975FF06B6BFEA17A1F3EF051F801EE98138DC1AC0AFA921A12C5C8FE",
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-      "legacy_metadata_key_hmac_key": "2B6F3B3614CF37EA099BA7B392B80A66D23E2DA35A89A95C5CC49E55544A290F"
+      "extended_metadata_nonce": "A0A936CA136E8ECA670708EB",
+      "extended_signed_metadata_key_hmac_key": "27200867B9446FAEC18E4B472C0C2A43D8180753607B42B678184CC5CA3B1AB1",
+      "extended_signed_section_aes_key": "2214D4050FEBA4E4C18543FD920D15C4",
+      "extended_unsigned_metadata_key_hmac_key": "51EE6B49F353568E055B06CFB717A8A467DEE6D90A6D5B325052DFFA15564C6E",
+      "extended_unsigned_section_aes_key": "6F162714F3BDA65324EBBC4B328CD0CE",
+      "extended_unsigned_section_mic_hmac_key": "DA51358ED2AA0916325399E9A2B0244D1791A1C5D600AFD8A351BBCADBE616EA",
+      "key_seed": "8EDCDDAE0F2742D381A7E56284E6804AC68080F872F6A587DE4DADC5B589A4A5",
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+      "legacy_metadata_nonce": "CDD93F6D02D83D0685DF0729"
     },
     "legacy_adv_salt_hkdf": {
-      "adv_salt": "072F",
-      "expanded_salt": "B43345D3366D608F54C1EE019C1998FF"
+      "adv_salt": "5E81",
+      "expanded_salt": "A1D53BE4EC3D0418587BD370BEFC413A"
     },
     "legacy_metadata_key_hkdf": {
-      "expanded_key": "EEB3312A3732042945620AF2E7D0C29D",
-      "legacy_metadata_key": "5E43FA6496647C089707D94ADAD1"
+      "expanded_key": "39B757F61E136408F7D8CD58DBAE1A89",
+      "legacy_metadata_key": "F58C1AE45F74112200878EB16AD2"
     }
   },
   {
     "extended_section_salt_hkdf": {
-      "derived_salt_first_section_first_de": "77D827CAB84AC63B236FFE3E3433D58C",
-      "derived_salt_first_section_no_de": "DDCDF25F4DF75CFDF6E61BAA3534D02F",
-      "derived_salt_first_section_third_de": "B242FFC929E7CB45995FDBAA518023EF",
-      "section_salt": "E9BE87097B46F1ECF1599A8CFF6B733A"
+      "derived_salt_first_section_first_de": "4B9D669E994848CF832475821E5BA9A0",
+      "derived_salt_first_section_no_de": "B0DD4242F201361D92B775C5F192C979",
+      "derived_salt_first_section_third_de": "E5A6AE615AE988C06CEAB18846B5F659",
+      "section_salt": "33CC65E1EC1CE33B169733DC3096B450"
     },
     "key_seed_hkdf": {
-      "extended_metadata_iv": "86EAA7A4DCC14F46BC0DED6A",
-      "extended_signed_metadata_key_hmac_key": "0D9F3B42A8E767469502E712B51C813FCAB46C2334FA211CA4CF4F0AF0FDF3F6",
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-      "extended_unsigned_section_mic_hmac_key": "A09020CDAF3065D819CBF403F535CCCE6C01F9065AEEE17D387CE4CD4ECE6190",
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-      "legacy_metadata_key_hmac_key": "2B44399F003EEE9B3C8BED7FD5DB36312BD3ABB74DAF2906385C8AC18CFBF031"
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+      "extended_unsigned_section_aes_key": "58C6E7AFDBC57C0482C6E611EF1A346E",
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     "legacy_adv_salt_hkdf": {
-      "adv_salt": "B0BE",
-      "expanded_salt": "67EC91AE5ECB6AE486F3CDE9DC157A55"
+      "adv_salt": "5FC9",
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     "legacy_metadata_key_hkdf": {
-      "expanded_key": "F5F439BA7C62F663FAF23500503E86DB",
-      "legacy_metadata_key": "84F9657119551852069A8951B33E"
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+      "legacy_metadata_key": "062743EDE5C56F5130998BADF2D0"
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     "extended_section_salt_hkdf": {
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-      "derived_salt_first_section_third_de": "F6570D47497354FF539D80114BE10525",
-      "section_salt": "10D37E1694E36AA955F01C1A90769FF0"
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+      "derived_salt_first_section_no_de": "586199F442C8473B9690A6AEAC36A405",
+      "derived_salt_first_section_third_de": "B69365658EE47B79809645ACBD160173",
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-      "legacy_metadata_key_hmac_key": "151C439A28F295D2759880EF9AEB93CCB66FE6CD7790C8A34449053E030E40C8"
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     "legacy_adv_salt_hkdf": {
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-      "expanded_salt": "08138CDC7743180FC29D01F0BACFFC00"
+      "adv_salt": "79A5",
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     "legacy_metadata_key_hkdf": {
-      "expanded_key": "FB5E4A698BA97AD12B1526EAA0850BCB",
-      "legacy_metadata_key": "1FF7AC32FF6140A283ACE2772967"
+      "expanded_key": "359493D5139411922367E5C050162264",
+      "legacy_metadata_key": "579718BBEB70558182C85652E2FB"
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     "extended_section_salt_hkdf": {
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-      "section_salt": "E1A4CAA581F257133F9C10C10F749FAA"
+      "derived_salt_first_section_first_de": "81083ED8ADE4D6E6EBFEC991A837AC97",
+      "derived_salt_first_section_no_de": "8BDCE6C08C41DDB5EF3990EE1962965F",
+      "derived_salt_first_section_third_de": "6451CAC1C77CDD02F6339AC8F5011935",
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+      "extended_metadata_nonce": "C47EAAC92D0E2BC76D5B7168",
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+      "extended_signed_section_aes_key": "E4CFAEF9DAA97426A0F6776ABBDD0615",
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     "legacy_adv_salt_hkdf": {
-      "adv_salt": "1FDC",
-      "expanded_salt": "E25BB06A1B34CF094EA14AC6B8C20015"
+      "adv_salt": "7369",
+      "expanded_salt": "7B7D59EA9882AC8D8E5B95F11ED6773B"
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     "legacy_metadata_key_hkdf": {
-      "expanded_key": "37448CA07DC157F27CAC2E1AB9C8D838",
-      "legacy_metadata_key": "4350ADD6E02BCEB94E7433EEBBAA"
+      "expanded_key": "20D2CA28DAD44F40276871C7B8AD6D1A",
+      "legacy_metadata_key": "AD5DBAB68501DADA871E6CE6EFF0"
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     "extended_section_salt_hkdf": {
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-      "derived_salt_first_section_no_de": "DC4FE5ACECF590142099516D40065B66",
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-      "section_salt": "36CC6F46BD73C7F024EB7AE10589C0D0"
+      "derived_salt_first_section_first_de": "C27C4FA03E43A46EADAC3A827A6ABDA1",
+      "derived_salt_first_section_no_de": "28B6CEF526584124B03720FC4A65188B",
+      "derived_salt_first_section_third_de": "76B42830B3813795F19CF07B6EFD17C8",
+      "section_salt": "3DAC056F62D259B969B815D08DA79507"
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     "key_seed_hkdf": {
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-      "legacy_metadata_key_hmac_key": "702657C5826DE78F336F648DDF8B905C52BE8D9013493687FA07E3EB5FCADA9C"
+      "extended_metadata_nonce": "8BC4D291417DA2637FDCA948",
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+      "extended_signed_section_aes_key": "69E4C6301882A5494C10231DD82FD9AB",
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+      "extended_unsigned_section_aes_key": "744A7950D65D03AEEF5AF17C36AC3954",
+      "extended_unsigned_section_mic_hmac_key": "AF012F292628BFCB7421B4A846361AD4829FB93FD766A014A5D846B7F471F5A8",
+      "key_seed": "B46750D2A75BDF9960E825289F24D8A1C777C4481FDE9E1E38F72A3DF7B29AEA",
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+      "legacy_metadata_nonce": "0185B0580338EA6BD57D801E"
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     "legacy_adv_salt_hkdf": {
-      "adv_salt": "C402",
-      "expanded_salt": "E5E224C3505986B2F98D3D737E6BA3ED"
+      "adv_salt": "4456",
+      "expanded_salt": "4C0B15F195F4E9506FD3BF692C8A81A9"
     },
     "legacy_metadata_key_hkdf": {
-      "expanded_key": "480E88C02E840B8CE3877FE20160CDFC",
-      "legacy_metadata_key": "3ACC87CA1631542A95634B83B062"
+      "expanded_key": "F7B19B1F77FDDDA49AD637F92F559434",
+      "legacy_metadata_key": "71C96FDFE7539BAA0A52B6F4C1ED"
     }
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   {
     "extended_section_salt_hkdf": {
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-      "derived_salt_first_section_no_de": "A728477BF2ECA4EE4638475E29FA2556",
-      "derived_salt_first_section_third_de": "759CFC286455FE01EC95368700EB3517",
-      "section_salt": "C3594C2F9B7B630474CE1B6E259E19EA"
+      "derived_salt_first_section_first_de": "DB0238E42DD58FFCEF52697A6B60EEAC",
+      "derived_salt_first_section_no_de": "76B8797D8220B4F7D3F2994F57AF40F6",
+      "derived_salt_first_section_third_de": "8FEFF73B163E9ECBF0B75743237146C2",
+      "section_salt": "3FF3074E6E32C3A1282DA7E7486FD5D2"
     },
     "key_seed_hkdf": {
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-      "extended_signed_metadata_key_hmac_key": "335A5329D69F2DBAF752D827A3C00582151EDC1ED8679E7872175DAC629D0624",
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-      "key_seed": "590FD89A5C23FAAFC3CD961636F690EF21F5B3C664B9E4431CBE6A0F5852D9AB",
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-      "legacy_metadata_key_hmac_key": "2B1D0B1A8389505F324F2434FC6052D840A560F759D0D7DA8E6FA2D2C898C0A0"
+      "extended_metadata_nonce": "8E1A231A33610A9B3F78D046",
+      "extended_signed_metadata_key_hmac_key": "724CBBC4F7B44408327A62B1EF12BBC451732406FE77B1F7E6F5EB125D47F69D",
+      "extended_signed_section_aes_key": "EADDEDCCE98E6DC2145C48C5648052A8",
+      "extended_unsigned_metadata_key_hmac_key": "9519CC0F24A2DB8D534B9233E863D1105711E79E84DFBE17E13DC3D6C1332D2A",
+      "extended_unsigned_section_aes_key": "80C1210F4F306D881C7ED5568A78D643",
+      "extended_unsigned_section_mic_hmac_key": "590362F05927596F04EEE3633FD526DA7C17FBA4A4489DC1B09F33FA2A84DACC",
+      "key_seed": "D83D79192D3A1490BB2DF4F72686E8E351F5F354BBEDB83B389DBC94D0DECC6F",
+      "legacy_ldt_key": "F6CC44D2FB8A497FDEF4D8505BF8954C1673F7AA74279938FF60D74F2D56E5E590B1EA7E71EEE7A14782FB6E5DDF856402DE2F388BC7A6BE7808C6B02D6AF3CF",
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+      "legacy_metadata_nonce": "0AE81376D41C4A66A58C9E15"
     },
     "legacy_adv_salt_hkdf": {
-      "adv_salt": "0772",
-      "expanded_salt": "413CDAEC5F3ADE3B805F6B059C3E5A41"
+      "adv_salt": "7538",
+      "expanded_salt": "9C0EAC987D64D64324502964CE4260AD"
     },
     "legacy_metadata_key_hkdf": {
-      "expanded_key": "8514E57919999FFDABE029EBFE4C9426",
-      "legacy_metadata_key": "F6A9282D66621963A4DD14DA5F60"
+      "expanded_key": "809FF61B6778348B260BFB91DB789913",
+      "legacy_metadata_key": "BBCFBE39DF3BDF239B25E14976A5"
     }
   },
   {
     "extended_section_salt_hkdf": {
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-      "derived_salt_first_section_no_de": "37A84529C1DF8120FF00FB27D2B68728",
-      "derived_salt_first_section_third_de": "8697E051AF8AB19B877750487128C68B",
-      "section_salt": "C6DB41C0D3BFD90F931FCE541AFCD0E7"
+      "derived_salt_first_section_first_de": "86485E5604FA2EF6F8EAF42DF4CE0CF1",
+      "derived_salt_first_section_no_de": "5506D594D6DEBDF6AA3FF103EF018765",
+      "derived_salt_first_section_third_de": "DE2468D8B660E2757D9D80315450D573",
+      "section_salt": "C7321D6A2F9877CB0FF99B9B11D34309"
     },
     "key_seed_hkdf": {
-      "extended_metadata_iv": "9C8612162C7D9779A69DD85D",
-      "extended_signed_metadata_key_hmac_key": "6B8C2FD91468F764C4401D2CD1F8463975E8661E50BBA370F08ACBF9B4FFA8F3",
-      "extended_signed_section_aes_key": "E8ACE3ADA80F025239C5D570FBD051CA",
-      "extended_unsigned_metadata_key_hmac_key": "43197CD7A7D0EBB45F3512EB0786C94FCA415A6246DC82A6D99EAB0E74B245BA",
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-      "legacy_metadata_key_hmac_key": "54AE858F851495DD1785E407A403EBF1BCDAAA419E0ACCACCAF9BA048148CD31"
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+      "extended_signed_section_aes_key": "9B42E858D2ED7439F951403533CAF3F0",
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     "legacy_adv_salt_hkdf": {
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-      "expanded_salt": "05E15052944C8807E83B0D02311E7899"
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     "legacy_metadata_key_hkdf": {
-      "expanded_key": "5F5E3038F30C046414E62C7ED69ED169",
-      "legacy_metadata_key": "0CF61FC5567A9DC10368651E154D"
+      "expanded_key": "C4ABC2194181D14624AFE1B545E87B95",
+      "legacy_metadata_key": "2F8C7737B5E98216C6358DFD1163"
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-      "derived_salt_first_section_third_de": "67DF2342882079FC110BB360AF85C77D",
-      "section_salt": "9691AAE691C218217DDDCCA62E71D2AA"
+      "derived_salt_first_section_first_de": "A662F512F68A331133401EA5EB2A2A66",
+      "derived_salt_first_section_no_de": "BFE2EA19A0984DEE6BE7EB90DC2FC58E",
+      "derived_salt_first_section_third_de": "92E3744D86B5ED21D50C726A66ED36B5",
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     "key_seed_hkdf": {
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     "legacy_adv_salt_hkdf": {
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-      "expanded_salt": "3D5E1AF980327BB62D48459A059B1F96"
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     "legacy_metadata_key_hkdf": {
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-      "legacy_metadata_key": "8BB2F7AA03300263A5377DCE862E"
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     "extended_section_salt_hkdf": {
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-      "section_salt": "015AA1BC9A0D95C10730A939077B8342"
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+      "derived_salt_first_section_no_de": "00FA8A3468172AA618AA22518A04AB90",
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     "legacy_adv_salt_hkdf": {
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-      "expanded_salt": "9FAF3F48355E078675D703262457CDEA"
+      "adv_salt": "2D24",
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     "legacy_metadata_key_hkdf": {
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-      "legacy_metadata_key": "030D688191286FD28E91F74F5891"
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+      "legacy_metadata_key": "E95212B84FBB8BD181401FB77BCE"
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     "extended_section_salt_hkdf": {
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-      "section_salt": "1D55077FAD5CBD01665FC731638C21F0"
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+      "derived_salt_first_section_no_de": "F13440BC0A2B7911039742C57654D2B6",
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-      "legacy_metadata_key_hmac_key": "F43B428D32CC71007017961A5FDE2AD341443AA99E327CA2FD42A7D475DDAA77"
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+      "extended_unsigned_section_aes_key": "A12E741FBEE73C341789F4A2E217E568",
+      "extended_unsigned_section_mic_hmac_key": "C11625C0E356394FA499EA6E7606CD7ED016364FC8913C2590CD04E6B7101C33",
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+      "legacy_metadata_nonce": "B8E730D17A2B71DFD2113E80"
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     "legacy_adv_salt_hkdf": {
-      "adv_salt": "041E",
-      "expanded_salt": "661E48D938A42B8CFF7021FF618858B9"
+      "adv_salt": "7141",
+      "expanded_salt": "9E8C5C44E412C2E5D54FB423AB48102F"
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     "legacy_metadata_key_hkdf": {
-      "expanded_key": "81AC722BA8CB31EC4550BBB8BB6C3460",
-      "legacy_metadata_key": "7AD1AAE8DA11219F64954C036BC2"
+      "expanded_key": "1FC5EA826AA0C33800219591A2856184",
+      "legacy_metadata_key": "DBEE14EB39323EE9CC4B341C3A00"
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   },
   {
     "extended_section_salt_hkdf": {
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-      "derived_salt_first_section_no_de": "1EC7EC56D94D25CC7C9732C6B34316FD",
-      "derived_salt_first_section_third_de": "D90D131F7C09E40224E4DFFB8A63EAC2",
-      "section_salt": "0DF2E4E9154B5F8A61B120FA0A83AE2E"
+      "derived_salt_first_section_first_de": "BA4492E8755975045094D06AC8930F50",
+      "derived_salt_first_section_no_de": "20B8815C2C7788BE334D8D945AFD59DC",
+      "derived_salt_first_section_third_de": "2E567F8F25DF8D06C7DF61A05811F7F1",
+      "section_salt": "627BA43CFCB6B9FD6C4676C1102635CF"
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     "key_seed_hkdf": {
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-      "extended_signed_section_aes_key": "FF3D3F08D2589A0024454D99AF8F2B80",
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-      "extended_unsigned_section_mic_hmac_key": "1536AB06F3EC74590B7D0D5D16F416C047AE2AE80F65403786B7270E24EE2E92",
-      "key_seed": "1DE3D34F71BAED2270A6BF468CE0E7C789D6A82BA9C7EFC83E46DB2353CCF546",
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-      "legacy_metadata_key_hmac_key": "E669C25D1F640933CA6F1A1B7566F2FF654E27DADDA58E1A9BA940DC08669190"
+      "extended_metadata_nonce": "D1FE7EF66BC90F8B53E64538",
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+      "extended_unsigned_section_aes_key": "6193B4A238BE3240C7E4D53E7708EE8B",
+      "extended_unsigned_section_mic_hmac_key": "45CC2AFD5BB72392874172AC5C059E871BD6E9C46D977E6D0F7510B817B180B4",
+      "key_seed": "B237A0FC008DF51F15EA3E1789FC834923556B61A7BD30664EA06BE6C40169D2",
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+      "legacy_metadata_nonce": "F58512DCB899E1F857C3394D"
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     "legacy_adv_salt_hkdf": {
-      "adv_salt": "E3EA",
-      "expanded_salt": "BBCB2DBBEC7A1E0B4FE4AE298A25509F"
+      "adv_salt": "770E",
+      "expanded_salt": "7A1A3782A82F1E40CCBD5330A84750E7"
     },
     "legacy_metadata_key_hkdf": {
-      "expanded_key": "BE3318D1377A715C94A01EAF876FB622",
-      "legacy_metadata_key": "1374ECBA466C0B72C464D856FF5F"
+      "expanded_key": "C8C682033DA60D93756D23338D6427BC",
+      "legacy_metadata_key": "E12C6EE466A1ED61753B30E6BD6C"
     }
   },
   {
     "extended_section_salt_hkdf": {
-      "derived_salt_first_section_first_de": "322F6D53734E8E02C74CEB89202B0E59",
-      "derived_salt_first_section_no_de": "EC4952E507D20AB4A882DD1F21A13416",
-      "derived_salt_first_section_third_de": "85E05F603D51B587B160BD6A70F76030",
-      "section_salt": "EC528E80A2356F8DDD2BC3BBD54424CB"
+      "derived_salt_first_section_first_de": "B20A3B57F64EFC41D079734A14A3D576",
+      "derived_salt_first_section_no_de": "09B542C88D08F276B29C0E1A2A424246",
+      "derived_salt_first_section_third_de": "962AC562D09F20F714EB885E729D4C3E",
+      "section_salt": "53F5CD677966C5D1E3EC25D1089BDFF2"
     },
     "key_seed_hkdf": {
-      "extended_metadata_iv": "CC3D812F7D79DED8AE8A5FCA",
-      "extended_signed_metadata_key_hmac_key": "E1AE23F0680F633B625084D1675AE316CB583B0A5BD208BFFA482B57772D0DB5",
-      "extended_signed_section_aes_key": "52442AEB7C67541C63105D59BFB961E3",
-      "extended_unsigned_metadata_key_hmac_key": "929983E14C8A7B2D8FBE42A903CFF3485AB84F02E13D817075F67D5C7AAE39EA",
-      "extended_unsigned_section_aes_key": "0A2F66DFE4FCF8114E3811925685D22D",
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     "legacy_adv_salt_hkdf": {
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-      "expanded_salt": "194D79DAA734901C2DAAA451BB23DEB9"
+      "adv_salt": "524B",
+      "expanded_salt": "F0B23D5EB99A02DF9E8A7D6F8B8A1A3D"
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     "legacy_metadata_key_hkdf": {
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-      "legacy_metadata_key": "5D2615E311F76852D252D146CBD3"
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+      "legacy_metadata_key": "A4C003398DEF995E0CF5457DF3A0"
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-      "section_salt": "7B3365E1E8F4B7C0F0671DCC7BB7EEE8"
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+      "derived_salt_first_section_no_de": "A342A8CFFBD87DA2F95D1C72CB0EEA36",
+      "derived_salt_first_section_third_de": "6F049F5664239C49D76286B8218D64B1",
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     "legacy_adv_salt_hkdf": {
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-      "expanded_salt": "861EC503D1A4C3F73A9D725AF35E750C"
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     "legacy_metadata_key_hkdf": {
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-      "legacy_metadata_key": "6F7FABCFB8027F832BB7415676CE"
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     "extended_section_salt_hkdf": {
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-      "section_salt": "C10AC014A2F2FD16ACC9A51ADBD8CD83"
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+      "derived_salt_first_section_no_de": "2DCB709ACE9617A6119BD2CC960EED9E",
+      "derived_salt_first_section_third_de": "FE06376C4AE96023D51C6C8475072558",
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     "legacy_adv_salt_hkdf": {
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-      "expanded_salt": "9C0F563EC06D003F3CD1F396FBA263DA"
+      "adv_salt": "7975",
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     "legacy_metadata_key_hkdf": {
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-      "legacy_metadata_key": "70BA30661F9E66D37CC0FC1D9B80"
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+      "legacy_metadata_key": "70A44BF295A6510C039A031BCB04"
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     "extended_section_salt_hkdf": {
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-      "section_salt": "CC399C86EAEFC09C475BDB0DE3DB27A4"
+      "derived_salt_first_section_first_de": "0818451F633193982BFEBBD61988FF62",
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+      "derived_salt_first_section_third_de": "633611AFE0697A6F36BC5B76E685391E",
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-      "legacy_metadata_key_hmac_key": "9A2A1DA33A3ED20C916227B47860360CA5141882E40DA3ED5CE624EC139924D7"
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+      "extended_unsigned_section_aes_key": "DD5329454006EC3BD37FE3520810CD98",
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     "legacy_adv_salt_hkdf": {
-      "adv_salt": "CEF2",
-      "expanded_salt": "BC30931FA22783576E6BF70152F756BB"
+      "adv_salt": "7BC6",
+      "expanded_salt": "F81E9EC1C91B1007FF2A32D72FB6483C"
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     "legacy_metadata_key_hkdf": {
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-      "legacy_metadata_key": "0EDE0EDAB1E9BDEF9540BB1E3086"
+      "expanded_key": "36BB3E66C0820FC418EB2F1B873BDDA5",
+      "legacy_metadata_key": "89981C312BA536E82EC3B1090CA5"
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     "extended_section_salt_hkdf": {
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-      "derived_salt_first_section_no_de": "75643AAA00010ECA4AAC5E81193DD9CE",
-      "derived_salt_first_section_third_de": "0D2012D22F26FD28A47755E0B06AB870",
-      "section_salt": "BFA29B6B4FF9C8B86955747C3E4A985D"
+      "derived_salt_first_section_first_de": "218AB6D163ADEB31634B1DED52E56326",
+      "derived_salt_first_section_no_de": "0F4F42636DBC8ADE1DF3383E6E8C80F1",
+      "derived_salt_first_section_third_de": "B667CEF8B176732FD56AFE83BFAA7611",
+      "section_salt": "D884E95FCD3A29F4E951A3C64D43C020"
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     "key_seed_hkdf": {
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-      "legacy_metadata_key_hmac_key": "29AB8006C12772E63DF5B30731AF7EC12764E5241E9AB64AD4A55EB8CAEDEDC5"
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+      "extended_signed_section_aes_key": "7DF8CEF6BFDA7D1944BC5F5105BD003D",
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+      "extended_unsigned_section_aes_key": "608194400C0D4390A12891645FEE4EA1",
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+      "key_seed": "871B0FD2D15F8C5EA49B610C544D0F957884876C614228083A414F8A441A2D30",
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+      "legacy_metadata_nonce": "60B88352445ED074EA447690"
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     "legacy_adv_salt_hkdf": {
-      "adv_salt": "316D",
-      "expanded_salt": "911E7D5D4C77FD301C69A6C393F2780F"
+      "adv_salt": "BFDF",
+      "expanded_salt": "AFDBB3A928B41B9C72F3CC9C21437B63"
     },
     "legacy_metadata_key_hkdf": {
-      "expanded_key": "9255D12C06F2E21FC5D1B46E0598811A",
-      "legacy_metadata_key": "130C64E062D85A90B08017B3125A"
+      "expanded_key": "4F832379A70733EB481C98C287573D51",
+      "legacy_metadata_key": "9C8893A6DB94328439157550279E"
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   },
   {
     "extended_section_salt_hkdf": {
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-      "derived_salt_first_section_no_de": "D9BE6122469942FB8381B8027C8C9366",
-      "derived_salt_first_section_third_de": "7382FB945B8A0C6970C6D86C45DA228B",
-      "section_salt": "6A95D71D0ADF01EC57F4DF6DAD185817"
+      "derived_salt_first_section_first_de": "1F3AC1292A3E34943F65ACBD5A5D5F71",
+      "derived_salt_first_section_no_de": "6162875F35A6B9B20C0F81C8CC9BC0D6",
+      "derived_salt_first_section_third_de": "EF5A3849BB1526EFEF254214AE714CD9",
+      "section_salt": "4058BBC28C1E874801AB570EAA0B1EB6"
     },
     "key_seed_hkdf": {
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-      "extended_signed_metadata_key_hmac_key": "804FE7B0AB1263433082099D62E147024111945A4439F1160B14C9549237AF45",
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-      "extended_unsigned_section_aes_key": "B40C275D64F4285314F5D87E5B717178",
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-      "key_seed": "66C637A11F9437136AD368FD5DA750CFB7B9DA2EA0A59AC3B102620DC0FE8607",
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     "legacy_adv_salt_hkdf": {
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-      "expanded_salt": "E876CD3ECE28B7428A6B5590A6CB639C"
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     "legacy_metadata_key_hkdf": {
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-      "legacy_metadata_key": "5F79A78A99B1AD41B64E5D67CDAB"
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-      "section_salt": "171023CBFF1355AEC5FEF3A74A6F86BA"
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+      "derived_salt_first_section_no_de": "C6C751B4257933CCE05AD7C336B3F17B",
+      "derived_salt_first_section_third_de": "292892273B46FB6C99FA4BC3C44708BD",
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     "legacy_adv_salt_hkdf": {
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     "legacy_metadata_key_hkdf": {
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-      "legacy_metadata_key": "7F2D15CB936AC5536825D62B00E0"
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-      "section_salt": "2B37936AEEBAAB430945809C42AC86B8"
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+      "derived_salt_first_section_third_de": "DE0B861151059E218B754C32B123C147",
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     "legacy_adv_salt_hkdf": {
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-      "expanded_salt": "5A039E6A722686B807397B61C56396B1"
+      "adv_salt": "6C58",
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     "legacy_metadata_key_hkdf": {
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-      "legacy_metadata_key": "641519C04877DC05BF1E9F6F7242"
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     "extended_section_salt_hkdf": {
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-      "section_salt": "B28BBE4488801B34E952884C05A25DE9"
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+      "derived_salt_first_section_no_de": "297FC2DCC22C9793610FD3504DBAAA3B",
+      "derived_salt_first_section_third_de": "CF455558C8C67E5AB573C79AC356B02D",
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-      "legacy_metadata_key_hmac_key": "98EB4A0D304CB167739F360037AEADE8DEE2AEE1DA6EC4A34354B3E5AD0C367C"
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+      "extended_unsigned_section_mic_hmac_key": "C7AE5C3B45B8FA9AD2EB92D39CCF3D67C9F10BCFB44BDC747EEFF84FDEAFF921",
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     "legacy_adv_salt_hkdf": {
-      "adv_salt": "E4CC",
-      "expanded_salt": "A1E4328176AB21117885227723B67D52"
+      "adv_salt": "6716",
+      "expanded_salt": "7EC07D3176C5ABCB3731A38D7CACE699"
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     "legacy_metadata_key_hkdf": {
-      "expanded_key": "756C7A29854A53FF463D97E07C0E2324",
-      "legacy_metadata_key": "E0F6EC8DF3ED6B392A2056761AD6"
+      "expanded_key": "97CCAE1E7A2BB5319834306D940B4798",
+      "legacy_metadata_key": "736A5584FB8EF29D722171B0E133"
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     "extended_section_salt_hkdf": {
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-      "derived_salt_first_section_no_de": "4E4765F03A554DBB53E720A3B168F3A8",
-      "derived_salt_first_section_third_de": "767F365DF04E1AFC152C2CC73BADE156",
-      "section_salt": "01E26007CBB46DE79451BCD56DBB0E92"
+      "derived_salt_first_section_first_de": "AD388BD4C9CA419A983A50DE70B96E87",
+      "derived_salt_first_section_no_de": "ABACFA97695D2FBA00E7D5F2BB322165",
+      "derived_salt_first_section_third_de": "C3BDDC19E7A1D453F8BE2B85958C2B6A",
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     "key_seed_hkdf": {
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-      "legacy_metadata_key_hmac_key": "7F3B256FB7FBBABBDB5A3B6E0B0859D3543A1149169B049B978E0A49FE403C1F"
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+      "extended_signed_metadata_key_hmac_key": "BC06E2ECDF44C4E749F07AA9FFDAE6786156382DEB38214C23ADF9676273F058",
+      "extended_signed_section_aes_key": "277CC3A4FBD6FA8A0433813C35AE03E0",
+      "extended_unsigned_metadata_key_hmac_key": "A93DCADBFDB56157B57CE0FB27845AB3B14072BB8F51AD430251D5FE431E4862",
+      "extended_unsigned_section_aes_key": "01AACC054CCC1E4C69A30F5BDB083DF6",
+      "extended_unsigned_section_mic_hmac_key": "ABD3E647D57721A8AFD6CE354E65FA9717FE273B3D3002C9EF116E3060EE49CA",
+      "key_seed": "04A09B2901EA8F73BF4503081DA2B2F1C701C8FB2E6D0727229AAF18E618D6B2",
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+      "legacy_metadata_nonce": "D451E840855973EBCD5CB21E"
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     "legacy_adv_salt_hkdf": {
-      "adv_salt": "A4E6",
-      "expanded_salt": "9AD6EB3BE9395989A939AD0DB26077ED"
+      "adv_salt": "4BE1",
+      "expanded_salt": "76209392CCAC5FB22D8EEAFAEDD20ECC"
     },
     "legacy_metadata_key_hkdf": {
-      "expanded_key": "9DC2FCE2450FF3447EFD4327A498192D",
-      "legacy_metadata_key": "A61F6AA418E6B8809523F86D721A"
+      "expanded_key": "2EAFE79FB0028DEEAAABCC1ACE7F7B08",
+      "legacy_metadata_key": "1B9CE163FB544E4B189C5F2B72E1"
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     "extended_section_salt_hkdf": {
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-      "derived_salt_first_section_no_de": "FFD47335FE0562183C751BC1FD33CC68",
-      "derived_salt_first_section_third_de": "8C6E61694C094EB572C0E747626B8A07",
-      "section_salt": "DDB194B8C1D0213FB9590185A101D80A"
+      "derived_salt_first_section_first_de": "2F0D5E19F15AD52B54C40021FEE0F9E1",
+      "derived_salt_first_section_no_de": "7826CEB8C46C4FE75DFAEB56973BC3BD",
+      "derived_salt_first_section_third_de": "CAC8343515178DAE36FD923FEBD8452D",
+      "section_salt": "CDBB37DFF788530779D089D6EDD732F5"
     },
     "key_seed_hkdf": {
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-      "extended_signed_metadata_key_hmac_key": "EF80B51B181C8747C8CB275CDBD9F27385B461CE1E382A4E85D421D278F6B7EF",
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-      "extended_unsigned_metadata_key_hmac_key": "8CE657576037BAEC83B37A2BBA9E36CDA43BB500062170688C5B87FF6CDCE780",
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-      "extended_unsigned_section_mic_hmac_key": "A6EF63BF56F6C52DE066CDD48712B4B946D3ED8A0E65C457D0397BD022610F4B",
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     "legacy_adv_salt_hkdf": {
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-      "expanded_salt": "ACE228B25E368353114924961002AE10"
+      "adv_salt": "B1F7",
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     "legacy_metadata_key_hkdf": {
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-      "legacy_metadata_key": "BA578B4E7BA8787CA8DB63708977"
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     "extended_section_salt_hkdf": {
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-      "section_salt": "9C138F3BC35BF3DE7F0A860E73BD37E7"
+      "derived_salt_first_section_first_de": "C03F4007F1E7180EC871FE12519F98B2",
+      "derived_salt_first_section_no_de": "A76C0BBEFDC804F829DEF65EA3F51C90",
+      "derived_salt_first_section_third_de": "A4DF26763162B19617B24D357C4E7EC3",
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     "legacy_adv_salt_hkdf": {
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-      "expanded_salt": "99519074F0590192D425D934B91CDDF6"
+      "adv_salt": "B28E",
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     "legacy_metadata_key_hkdf": {
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-      "legacy_metadata_key": "0A8B9807DCA4FB02B3186C9C35DD"
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     "extended_section_salt_hkdf": {
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-      "section_salt": "0FBA8F7896472BEC47D7FB231A187B35"
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+      "derived_salt_first_section_no_de": "75AA3B31D990FA958C0BAB07C316137C",
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     "legacy_adv_salt_hkdf": {
-      "adv_salt": "4125",
-      "expanded_salt": "242C1B74C50B45F437E30F545E66E8A5"
+      "adv_salt": "7CE1",
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     "legacy_metadata_key_hkdf": {
-      "expanded_key": "6DEC2241E14E16A23AFB3818624E14E5",
-      "legacy_metadata_key": "658172FBCBCBE95216909E9DBD96"
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     "extended_section_salt_hkdf": {
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-      "section_salt": "BCDA9DF5858AB23D74385FF78D7F2395"
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+      "derived_salt_first_section_no_de": "2736F330B0FC8CE3AC39558F48513039",
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     "key_seed_hkdf": {
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     "legacy_adv_salt_hkdf": {
-      "adv_salt": "036D",
-      "expanded_salt": "B632179C11C52811DD43E21CF1D8E086"
+      "adv_salt": "D6EB",
+      "expanded_salt": "83EB2FECC0F1C19A6EF7FB30E945C103"
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     "legacy_metadata_key_hkdf": {
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-      "legacy_metadata_key": "7D0343DFBF228A0C559B8CEECA39"
+      "expanded_key": "60C52A4D9245D6E8D49DB7FE7FDA5C43",
+      "legacy_metadata_key": "4E2117A0CED10CE233750FBAB835"
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     "extended_section_salt_hkdf": {
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-      "derived_salt_first_section_no_de": "F727AF8DC6CF2A41C314FACD1F80D284",
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-      "section_salt": "1A656CFF4D9BE4E87546E06922434FB5"
+      "derived_salt_first_section_first_de": "849B406AC1383E3333C4526823350AC8",
+      "derived_salt_first_section_no_de": "F2657BBB7FB8879E98F9D4EE55343AA4",
+      "derived_salt_first_section_third_de": "9025C1E15E5668F1144640D7C2CB7F63",
+      "section_salt": "971929C83FBFB8552FAC4316895F82EF"
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     "key_seed_hkdf": {
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+      "extended_signed_section_aes_key": "EB1F668BACAD4DE4555036C8B9F21D9F",
+      "extended_unsigned_metadata_key_hmac_key": "F7016A22618D636539DD37221EB7BA8BE8764707AB9DEBA695FAE93546E1E777",
+      "extended_unsigned_section_aes_key": "7AF856E9EA5F3AC6EBF2DA80EC065050",
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+      "legacy_metadata_nonce": "EE05CC8759A360B9699FFD9F"
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     "legacy_adv_salt_hkdf": {
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-      "expanded_salt": "DAB0ED9C1F81865B9FD37071708BDF13"
+      "adv_salt": "7FEA",
+      "expanded_salt": "C7E9D2070465A796CB27EA5E81D7B5C9"
     },
     "legacy_metadata_key_hkdf": {
-      "expanded_key": "F18E4AD65C18E8FD116E2CAEBFA7DB94",
-      "legacy_metadata_key": "47174678CF6FA7DEE0E05334E06B"
+      "expanded_key": "E4AB233100D9D776DEBA1949426DC104",
+      "legacy_metadata_key": "C5E5885E8041F9A0E290D0174FF0"
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   },
   {
     "extended_section_salt_hkdf": {
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-      "derived_salt_first_section_no_de": "021D1824FF0D46468E254C7417010EF6",
-      "derived_salt_first_section_third_de": "71072302A93C89CD07907A2C30436265",
-      "section_salt": "7CDE00AC84F62FB7936948FB6B95D40A"
+      "derived_salt_first_section_first_de": "582878C554E5BFF92A4C26C50BBC2B27",
+      "derived_salt_first_section_no_de": "C9FA9274CB4C3F6F03BB7F2AA5D70A11",
+      "derived_salt_first_section_third_de": "582276B5F71F65E87B883C86DEC83349",
+      "section_salt": "2DA2B6676B05EADBBA2AC2C7A1B91E5B"
     },
     "key_seed_hkdf": {
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-      "extended_signed_metadata_key_hmac_key": "A3C71ABFA7CE16E128CA091991BD6DEE3120EED0AE5F31CFFDF3E530A8208505",
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-      "extended_unsigned_section_mic_hmac_key": "8AD53085960C12B365A958D24B78D68B38B2B41D5D3F24C761D1944E960320E5",
-      "key_seed": "62034832E628C769C45D5C3C3D548FFFC66E10756E7AD4DE0C7B9AB62BDDDDEE",
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-      "legacy_metadata_key_hmac_key": "CD3C5AF21887AEF7ACDAC2FF270AEA210D7C71F2E8EF2DE38C0B8C2CD2DBAC64"
+      "extended_metadata_nonce": "1516355E155E481A2C1BC292",
+      "extended_signed_metadata_key_hmac_key": "A96AB799DBBF000DBD6429124DF1AB94AD26BA8EA3CFA2BD3685D18F74AB95B5",
+      "extended_signed_section_aes_key": "2EA7AA6081C6055A50D2BA83F7650ECE",
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+      "extended_unsigned_section_aes_key": "FCF1C0C04D383C2B440E91142D5F8DF3",
+      "extended_unsigned_section_mic_hmac_key": "617A0B559B6C31312C6DB59956560DB2200B0DA19132085BB51EEC4662365BEC",
+      "key_seed": "BEE55110B49523CA92D9CD1921A3A3556D3DAE9E7D2DC1DCF809A7F744D744FB",
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     "legacy_adv_salt_hkdf": {
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-      "expanded_salt": "BE6BB375C9956FCA60348AD6FC770D52"
+      "adv_salt": "E41C",
+      "expanded_salt": "F90A3A5A7E184026B2412B7981E6E4EA"
     },
     "legacy_metadata_key_hkdf": {
-      "expanded_key": "6634868DC35E8E14979A31C7053D7103",
-      "legacy_metadata_key": "0B6956C229BE28808BC2F0F1D70A"
+      "expanded_key": "7CBB4317E53C77A6EAF04270340C8E74",
+      "legacy_metadata_key": "290406B8E4F3FDD69F77100C25F8"
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     "extended_section_salt_hkdf": {
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-      "section_salt": "4B41FF36C2933198DE83446E0FB432D2"
+      "derived_salt_first_section_first_de": "09C85DC366B0A127E44BC3EB55F1B69F",
+      "derived_salt_first_section_no_de": "8E806978646803E71CF5A89A993EBD15",
+      "derived_salt_first_section_third_de": "A79CB0BE50F815A706B75686E8AF95A8",
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     "key_seed_hkdf": {
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+      "extended_signed_section_aes_key": "DDCE8B724FCB835C5769FC12FBBBCFA1",
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     "legacy_adv_salt_hkdf": {
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-      "expanded_salt": "D61D4B5CAC2130DE87C66A2139633B9E"
+      "adv_salt": "5D87",
+      "expanded_salt": "6CD22F42846D18DEB8B16AEC28055646"
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     "legacy_metadata_key_hkdf": {
-      "expanded_key": "150D844EEA1A74427A44A75AEE7C54C8",
-      "legacy_metadata_key": "610D4DE403479EF31CC0644AF7E0"
+      "expanded_key": "67C50D4BE0C807CC777A451E55290706",
+      "legacy_metadata_key": "CC56E75A8BB54C3CE1EE9DAC6855"
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     "extended_section_salt_hkdf": {
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-      "section_salt": "886B4FF7A06AB4A911DBF3BD962C525E"
+      "derived_salt_first_section_first_de": "724B63781CDFD0DE57D682E929C0F1AC",
+      "derived_salt_first_section_no_de": "DA6C22EBBD2E4FC58307D725E7001E18",
+      "derived_salt_first_section_third_de": "70E96C64C5013DDA87D8750BFC734CCF",
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     "key_seed_hkdf": {
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-      "legacy_metadata_key_hmac_key": "73FCC3502C96E1C12BD22D7AEEB044A839C57E08999A1B37547141EECCC985CB"
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     "legacy_adv_salt_hkdf": {
-      "adv_salt": "99E1",
-      "expanded_salt": "424BB3492545619BDDC5C76C37AD96FE"
+      "adv_salt": "2C1F",
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     "legacy_metadata_key_hkdf": {
-      "expanded_key": "AA9833B821C2CD55E2EC376B3AF1155C",
-      "legacy_metadata_key": "2264E14310574DC254BCF1A5F117"
+      "expanded_key": "6B947A303D99A9874028683C7663E5AE",
+      "legacy_metadata_key": "95E95ADB8AAC112E502641BB3974"
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     "extended_section_salt_hkdf": {
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-      "section_salt": "30EEA803C91D76C465AD9D45F567E3A8"
+      "derived_salt_first_section_first_de": "699F64EEEE0A421370D20D1E656D8EF1",
+      "derived_salt_first_section_no_de": "0B9CC994DEB1CBEE31334AAE82BB01C6",
+      "derived_salt_first_section_third_de": "E883BA14BB1E9C1CF2CA544507A8E26D",
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     "key_seed_hkdf": {
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-      "legacy_metadata_key_hmac_key": "EB855E9051790A8DB9FD460FF732F6F572B55101A45B24E93EC78E058C0676B0"
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     "legacy_adv_salt_hkdf": {
-      "adv_salt": "7823",
-      "expanded_salt": "3273434F1F7410F4A8002AD34F4914D9"
+      "adv_salt": "1C18",
+      "expanded_salt": "A58037650FF49441923278D15FE312D6"
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     "legacy_metadata_key_hkdf": {
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-      "legacy_metadata_key": "5AD1F8FAE16DD522357BC2F4468D"
+      "expanded_key": "96B7834CD34C6EE7027864BC6CC410FF",
+      "legacy_metadata_key": "B8CD0EC6CBB33A4601A522200869"
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   },
   {
     "extended_section_salt_hkdf": {
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-      "derived_salt_first_section_no_de": "470EB7DEE423FCFA39F3BBA1F873B2C7",
-      "derived_salt_first_section_third_de": "50F2B5E54FFC2D3FFE45D77A65378BCB",
-      "section_salt": "FAB48E80D214D5052A30B09394585B17"
+      "derived_salt_first_section_first_de": "B091260FEC73EE7A8D70201F9D464F83",
+      "derived_salt_first_section_no_de": "EE1D6CE31F19649C24841A7F6533AF34",
+      "derived_salt_first_section_third_de": "14FD75BF7AD5B802CE6725D9A4C2EAC9",
+      "section_salt": "CC587F388F406FC90B64C0AF1000419C"
     },
     "key_seed_hkdf": {
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-      "legacy_metadata_key_hmac_key": "831D350FDF2337827425887FC9CAC0E73EA26416A02804ACB20E2B51E20A48CA"
+      "extended_metadata_nonce": "0F1F6DDCDD98D829428F0551",
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+      "extended_signed_section_aes_key": "3F4604AD3B2C106C10BA72C3ECE5AE49",
+      "extended_unsigned_metadata_key_hmac_key": "874627B363F91A534891A9285E0DF0EDD15DC79E3E48A165B0984D4521ACAD7B",
+      "extended_unsigned_section_aes_key": "B103A43F35DC81696985B85943FC9F7C",
+      "extended_unsigned_section_mic_hmac_key": "4983A837EC95679DFBB7BBC1EDA6839C351059CF76E3465FCB7150E2C9DAA555",
+      "key_seed": "67E041F864141E3F2D046910D9F966739B5C393ACC320E68C5DA6017D4599DC7",
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+      "legacy_metadata_nonce": "6E488DABE0EF2C8F5EDEE07B"
     },
     "legacy_adv_salt_hkdf": {
-      "adv_salt": "1ED3",
-      "expanded_salt": "0755524F687CB53E921DB5BC1ED6548F"
+      "adv_salt": "246C",
+      "expanded_salt": "A04B4F4D54258A3481BC4E119A6A2B62"
     },
     "legacy_metadata_key_hkdf": {
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-      "legacy_metadata_key": "2DF2B6E6DD0DE4303A96BBCDD9A9"
+      "expanded_key": "9DF4EB64B8D5D2959CFD9D092BC37B17",
+      "legacy_metadata_key": "5505114A304DFA404B9258AB6AF7"
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   },
   {
     "extended_section_salt_hkdf": {
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-      "derived_salt_first_section_no_de": "B80A907EE5C33C4B19333EC0DB60783F",
-      "derived_salt_first_section_third_de": "96E8484AC22D3873AD1659C798C8E1B9",
-      "section_salt": "A2D922473E18E5FAC6575A0167B90B05"
+      "derived_salt_first_section_first_de": "92F14175B1DFC4CE170902636E42713E",
+      "derived_salt_first_section_no_de": "4156C04BB9AE6EFA9DEC3233CD5A305A",
+      "derived_salt_first_section_third_de": "3C58FB419F0BD045E235ADC4352676DA",
+      "section_salt": "FCC5C8C0A905123991DB1963CA187342"
     },
     "key_seed_hkdf": {
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-      "extended_signed_metadata_key_hmac_key": "8D7F42D23937FC38330ADF816774C48C8ED41AE3752B0350516C9871BCFC37FB",
-      "extended_signed_section_aes_key": "B338C788C7F3DF2F016084C5E22C2180",
-      "extended_unsigned_metadata_key_hmac_key": "C2733BA1954274A00E85675CD6F89E4EADE9B4D00C3D4DD21BDF5FC7E589A523",
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-      "extended_unsigned_section_mic_hmac_key": "67E93AC6C12E4558A32712F0A694CEDDF66FEB6CB9E508EE4D52E4DD18FB546E",
-      "key_seed": "F18C859790E13FB1F2A04B257149350DC4735987A7BDF5B65830FB44B97AF7CD",
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-      "legacy_metadata_key_hmac_key": "F7F046D7D67B58F39D046B1C04FAA98CE89BCCE54CF0B8FB406670C1344F5265"
+      "extended_metadata_nonce": "E6CB1D645A1C322DD231C530",
+      "extended_signed_metadata_key_hmac_key": "6541D917FFD4EBE53C09BF098B18DADAAA8DFF5ACBB1356BB3E1439EAE91E399",
+      "extended_signed_section_aes_key": "A5C69E0BB040A4ED7AEA8D202D1AC1B6",
+      "extended_unsigned_metadata_key_hmac_key": "0F3C39ABFB77F95C5B015829511A821DC453306953B33D12A1D0BA5F2E48F3DE",
+      "extended_unsigned_section_aes_key": "F73B279C87F7D8145D53BCE3FBE49FA2",
+      "extended_unsigned_section_mic_hmac_key": "C386709CED7BF9873F36D764C601B3DB06FFF096993FE59E2C2E7A2E06C83ECE",
+      "key_seed": "66BD6221C1E30871D422B67F060C9E22800A834DF098843BFC648B76E54ED908",
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+      "legacy_metadata_nonce": "57EA5DBE1D8D34591922A866"
     },
     "legacy_adv_salt_hkdf": {
-      "adv_salt": "FF24",
-      "expanded_salt": "A027C7AF7AD5FAA69346C0C33178CED1"
+      "adv_salt": "AE61",
+      "expanded_salt": "EE04115499CE6C19FB6BB2610257A5FC"
     },
     "legacy_metadata_key_hkdf": {
-      "expanded_key": "1B9410BA672AF3BEB993C1A525A209E2",
-      "legacy_metadata_key": "9D659CD69B4BF6050004EF540D45"
+      "expanded_key": "45FE6BCBC3E86F2B10458F44DBC73647",
+      "legacy_metadata_key": "D9B336A4E52CB722943FFD9CF784"
     }
   },
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     "extended_section_salt_hkdf": {
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-      "derived_salt_first_section_no_de": "F562806E8B6E3CF96BD9F0C8912C96D4",
-      "derived_salt_first_section_third_de": "C02AFC741B08F60D0CEE071EEF6C9418",
-      "section_salt": "A7B23AA37623F6EA0622DF8777A07963"
+      "derived_salt_first_section_first_de": "6919D48644FFCB351097E0A7F63BAD7C",
+      "derived_salt_first_section_no_de": "B40EEC7CA7711C443BC6131AE1209711",
+      "derived_salt_first_section_third_de": "EE87CC5CE451FACAC62DD63C70F53BB3",
+      "section_salt": "E9C2AB1A142AAD88D5B3E8ECE861F46C"
     },
     "key_seed_hkdf": {
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-      "extended_signed_section_aes_key": "F56BC83F8631EF07298C58B72B64C8C3",
-      "extended_unsigned_metadata_key_hmac_key": "A92257B517794C4D6DC6D428F5923E49B0F571454C5720C0CAE2D0AA801D9FD9",
-      "extended_unsigned_section_aes_key": "A2A99669778E10269B0C1A238AC07B2A",
-      "extended_unsigned_section_mic_hmac_key": "B5C092860370D8FCCB032EC14DE934FADCDB86F800675B8C731923F48D8F1220",
-      "key_seed": "1A7141EB9B3ED3CBF5091BEFD266374A25DBD2916AABD5401C5CAC699339A24F",
-      "legacy_ldt_key": "0B32541AB6938735067B42BB3991B52004EDEAE67C3D303110BCD904C6C755428D5E4EA348609DD25056F85A9E45441898873B9C00871A08A07D425F8B4F9AA2",
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-      "legacy_metadata_key_hmac_key": "258E8BEC8C78DE464D65FDB189AB6BF77EF4E889586546DEE8DF05D9AD154FB3"
+      "extended_metadata_nonce": "1F7415759E6AF70ED5ECFB8B",
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+      "extended_signed_section_aes_key": "E39A23C3DE620D184AD6717B9441B453",
+      "extended_unsigned_metadata_key_hmac_key": "D97C790467145FC66B8962922BE7163D01E72398E58A7381E94E52205A99C49B",
+      "extended_unsigned_section_aes_key": "FB9F25B845153CD75A97C8FCDA32A6B9",
+      "extended_unsigned_section_mic_hmac_key": "7F291513A23A7AA803A1CD8DBA7A9DE24180EE1580B31E3AE689EF51851EF266",
+      "key_seed": "C76E4012BA6DAE4B2CC7DE0FD6A60790E7E69183D4C894EEB2C14F55F691D200",
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+      "legacy_metadata_nonce": "3DB25905270EA45BDE8B2C78"
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     "legacy_adv_salt_hkdf": {
-      "adv_salt": "864B",
-      "expanded_salt": "6B3DD6BCB2411A1F8EA3855823F324DA"
+      "adv_salt": "C0DC",
+      "expanded_salt": "51AFDF06C286189BE2A38DF2AC5C157F"
     },
     "legacy_metadata_key_hkdf": {
-      "expanded_key": "5947C53421B6131C7DC08FC6043FCB7D",
-      "legacy_metadata_key": "B67E88A465BB5008F533663C4370"
+      "expanded_key": "DBFD6CB8BEF948E30034942C217AB49F",
+      "legacy_metadata_key": "A6572C02A89BFC53CE24AFE726A5"
     }
   },
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     "extended_section_salt_hkdf": {
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-      "derived_salt_first_section_no_de": "A5C103B9D2D948F1FE0306ADCCFC7924",
-      "derived_salt_first_section_third_de": "6C026DA32F4B2E4C0EBF1593763F92A9",
-      "section_salt": "AA43650B928B92DFDCE36FF016381A71"
+      "derived_salt_first_section_first_de": "F0C2D07232D5E955E8C82CD835B56E1C",
+      "derived_salt_first_section_no_de": "1F34BDC3807F158859A6FACC33B76BA6",
+      "derived_salt_first_section_third_de": "8B547F100FE1EAD817E8DD7AC7FA6D7D",
+      "section_salt": "E887AFFFEBC6CAEA000CD7B2843AD21E"
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     "key_seed_hkdf": {
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-      "extended_signed_section_aes_key": "3C408C28ACB5B573398693DAC7DF7705",
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-      "extended_unsigned_section_aes_key": "95D9F58871326089A206914282E67978",
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-      "key_seed": "177CD7E1E53230ECD6541D6CCF3CB92700AC8F127C0284E0087F222C93BD85FB",
-      "legacy_ldt_key": "BDB5BE4B70A1FF1314241E7EC62D552BE4FA016A833631BC5FF0039717B181B3A0C9286FDA4A6A6BB2E0333C5BDA1741C9ACDCADB6916955714920638111B571",
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-      "legacy_metadata_key_hmac_key": "25ED9DC8559E3F9ED9140FADFD52FA60D252AF734B6BF484BB24AC933854C862"
+      "extended_metadata_nonce": "817052592ED2AC889E53F3DB",
+      "extended_signed_metadata_key_hmac_key": "ED836D0F732D1051DD4E7DAE505FFB670CA6717F7BC287E0C8957EEAA6AAB9EC",
+      "extended_signed_section_aes_key": "03D31EED691F220ED807A0A3699D01E5",
+      "extended_unsigned_metadata_key_hmac_key": "0C304D6EA35B6602646FC0E6951EFF09249712E42E8AA6BD995666AC29E774B6",
+      "extended_unsigned_section_aes_key": "8507DF1A8D34390EE03C10C29C16E20C",
+      "extended_unsigned_section_mic_hmac_key": "857FA3CEE51F9018367961FF82F30041D43DB1F1916BF067396EE7DEEE08B063",
+      "key_seed": "F7E47754ED974913367ECC4B4DE2B1E66D9C8EF36BC36875111231A421A1F892",
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+      "legacy_metadata_nonce": "23DE6EA7BB73D686CA04432D"
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     "legacy_adv_salt_hkdf": {
-      "adv_salt": "C245",
-      "expanded_salt": "59DAE48461A0EB7C98C3F8F2041BBE49"
+      "adv_salt": "FD97",
+      "expanded_salt": "AB621F612EC9F1DBF995C1CE7610A3F4"
     },
     "legacy_metadata_key_hkdf": {
-      "expanded_key": "AC7F5C36073AAFBE1E90A6C06DAE3CCE",
-      "legacy_metadata_key": "CD9067652260F600CFE4938640B0"
+      "expanded_key": "7E59495C2E31ACF37A8A82914D67A3C2",
+      "legacy_metadata_key": "FD95D8D7F1234F29C61B73586E50"
     }
   },
   {
     "extended_section_salt_hkdf": {
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-      "derived_salt_first_section_no_de": "152104DBA89A07EEE83C4C5F2498C481",
-      "derived_salt_first_section_third_de": "4D7E505355442D04FE3769159114FC01",
-      "section_salt": "3C129F4AB656E7D5A949AD60CA80D45A"
+      "derived_salt_first_section_first_de": "B1FFFDB5149EB2C1E55818C9AC278F22",
+      "derived_salt_first_section_no_de": "9FF7BA7CA2D7A64907CAD503C9D9E931",
+      "derived_salt_first_section_third_de": "E05CE47FEAAB471BDAAEEFE326144F87",
+      "section_salt": "05FD6AD5FB6ECEF67187AB22628D83F5"
     },
     "key_seed_hkdf": {
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-      "extended_unsigned_metadata_key_hmac_key": "FD96206385C607A5A273E6BC5E70525AE9C39603CE66337AD68494D8FB349C36",
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-      "extended_unsigned_section_mic_hmac_key": "C7A5DA9C0E39B3CAD55728F1CC3FB346E7A4083E63155942DB53B5480D01DC37",
-      "key_seed": "4C59D79988A1BC74944D98CF014A9D9DF06DAC3E6FC75E9E276293EA6C842501",
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-      "legacy_metadata_key_hmac_key": "FAB071688D92BC6CF54CB9CAE28F4447BB98A42316BE556F4297DC04E89BA639"
+      "extended_metadata_nonce": "656ECAFAD9D02F5C53D1499C",
+      "extended_signed_metadata_key_hmac_key": "3C07733D5EADB798C0F0A085711E7980D5437BC8D9003F2E6D32EB1E997D8D08",
+      "extended_signed_section_aes_key": "D49EF1EFFE0236EA082EF79C6BEF496E",
+      "extended_unsigned_metadata_key_hmac_key": "BBAF91442DABA83EAEA9AA3C6312972672AB20FE962605FDD01FD709F832D562",
+      "extended_unsigned_section_aes_key": "D472A600CD6F77F233D6274917328EDE",
+      "extended_unsigned_section_mic_hmac_key": "62A45AFFBCAE257E682BCB364B77F8FFFEF9088BB8DE260FAA6E622088E44A43",
+      "key_seed": "744EE5E68214D686A678E2F964A33C054EBF0155354CEEEC0EE77448F6E156F1",
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+      "legacy_metadata_nonce": "33283F73B1E3EBA32C5D862D"
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     "legacy_adv_salt_hkdf": {
-      "adv_salt": "7DA9",
-      "expanded_salt": "5F301D2B9A1CA71E21C353A5493F3EBE"
+      "adv_salt": "5987",
+      "expanded_salt": "BDA17AF3C8D8E8E7627742B3AB2075B6"
     },
     "legacy_metadata_key_hkdf": {
-      "expanded_key": "AC0A38282486063A30F5DBF41AB2702C",
-      "legacy_metadata_key": "3010D21F14DFDCDECCA482454CCF"
+      "expanded_key": "F9BFA683C1B856991A2C5CA893D71050",
+      "legacy_metadata_key": "DCE4D724E5161B46AC54E4C18A08"
     }
   },
   {
     "extended_section_salt_hkdf": {
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-      "derived_salt_first_section_no_de": "BA55ACE78620E7F96823251199B26D07",
-      "derived_salt_first_section_third_de": "06C8571AEC49FF48219AE1560368A8E9",
-      "section_salt": "BD13B6AF91158EEFE1CF800A7894E536"
+      "derived_salt_first_section_first_de": "DB22BC19A27CCC15E51A0A1B950857F7",
+      "derived_salt_first_section_no_de": "547CC56DC0A5507125082C68C053D5D5",
+      "derived_salt_first_section_third_de": "DFBAFDA1CF3AA59B26FE011EA450B823",
+      "section_salt": "078A2C255BB03030F52965D13B0AA53D"
     },
     "key_seed_hkdf": {
-      "extended_metadata_iv": "FF02376F2089E7250A4C917C",
-      "extended_signed_metadata_key_hmac_key": "661D4B425AB57DB9B537FB336B274B720CB5320D52FDBE66F39C5B30F556E2BF",
-      "extended_signed_section_aes_key": "41EA05D4588FCB271AE65DBBEE794FB8",
-      "extended_unsigned_metadata_key_hmac_key": "AEC434B9CD304EBA207D7DFD93986B1075BCFEA8A954F55699B80A9B73F60F06",
-      "extended_unsigned_section_aes_key": "7FAF03D73571D4958A3BFFD7B9333539",
-      "extended_unsigned_section_mic_hmac_key": "9BB251A17B12B8AED3C83223D87B8568AC18228F27106CEE29117A3261EFB70F",
-      "key_seed": "D53635615A5DF5ACC0E9E2252007913133B192E18D9F99DB5AC2D6664674DA2C",
-      "legacy_ldt_key": "53B9D4425342737FA2CC6261D725A0116E71369BBAF97C640B96CEF00FD9CE341053563B45A4DE179ED20BECE75EEA55EF4555B6C1C6B4BECB5E9EA581B6BE47",
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-      "legacy_metadata_key_hmac_key": "629FC68F0EC9500470C37D092082A2CB1B1F44C048C40063ED987B180789920B"
+      "extended_metadata_nonce": "1020F8C375AC5BF5D3DAC380",
+      "extended_signed_metadata_key_hmac_key": "98F6FD73D248D52E1338E6F37EF4BE53160EB68C57687BBD5F4C4AE7F2C5A6CD",
+      "extended_signed_section_aes_key": "63B0CB478D4E5F38F454521A785B5DA1",
+      "extended_unsigned_metadata_key_hmac_key": "77A743C542941356A1DB8D8F3031439401B82F1B7A6C5BDA68152C1232603CE9",
+      "extended_unsigned_section_aes_key": "B743EB7D63164D30EEA5F452F4ECB6EF",
+      "extended_unsigned_section_mic_hmac_key": "F34F5FED159362C0CFCE08702216F77B7BC9BD6739D7B7A6BE022F69E119A011",
+      "key_seed": "8D8B909F903746E317D2FAD7B81C44E14C2BC911BF57505FD21E657BDE7B9448",
+      "legacy_ldt_key": "B95B352CC7A616CFCEF94F140DB1FFF6C96699456B53E22EF2A92C189C8ACF71B15996E5592651FDB0B9EF482E3D3A77F69C43381BFA3FBEB77EF3FF3508C4F6",
+      "legacy_metadata_key_hmac_key": "0FA59F92E4D45EA6F7CE221654D40FD7F04723C271B02CF2E6FE7D2F38B1F9C8",
+      "legacy_metadata_nonce": "B8CE49F04135E2EFADD82878"
     },
     "legacy_adv_salt_hkdf": {
-      "adv_salt": "2816",
-      "expanded_salt": "6E58EF099AF281AEE3F48A0B638B66CD"
+      "adv_salt": "E04C",
+      "expanded_salt": "C09ED0239B32A0C2BE3A0EE440CCBE42"
     },
     "legacy_metadata_key_hkdf": {
-      "expanded_key": "0244177F7CD7012B84AE2CFD2888FC03",
-      "legacy_metadata_key": "8F9190ABC05EB25975C8163B9B4E"
+      "expanded_key": "3FEE720404CE1EA1B1D761262F6E2C09",
+      "legacy_metadata_key": "5D81EB7355CC5ED9A8979ACB3DC3"
     }
   },
   {
     "extended_section_salt_hkdf": {
-      "derived_salt_first_section_first_de": "43A21F25E28F0C0840EC559FFF2C77CF",
-      "derived_salt_first_section_no_de": "318D300B273A841391407DF1EA990678",
-      "derived_salt_first_section_third_de": "F6C4462588698A1327AF8C5727F8D233",
-      "section_salt": "C5AB9542815304C9CABEDF9D13A63777"
+      "derived_salt_first_section_first_de": "0062A464AD7B46EC51A8083B2F34410E",
+      "derived_salt_first_section_no_de": "08E8417B389B48DF971A62A738A28A1A",
+      "derived_salt_first_section_third_de": "A475206446E694B5751C5E3CAD225454",
+      "section_salt": "F2F39B46ED2763C2D2471485E6EAE97F"
     },
     "key_seed_hkdf": {
-      "extended_metadata_iv": "669490D3F88E97995D782DC9",
-      "extended_signed_metadata_key_hmac_key": "62F038D895010AAB5B7D2C17EA26390B4B4CD1F436F16B1983CEFDE16CD7A5FC",
-      "extended_signed_section_aes_key": "55719FC663D42279AE65DA11523D4354",
-      "extended_unsigned_metadata_key_hmac_key": "459954142086B739F644E45D0F690E8FC1848FFB8A0E4B87A32C26784BF5DD5D",
-      "extended_unsigned_section_aes_key": "C17A78BE9B333EB9C54C0B729F088C04",
-      "extended_unsigned_section_mic_hmac_key": "D6359DEE4C7AC1F316AB3753F5510081CC5BDAFEB766F5C196E807CC20D405E0",
-      "key_seed": "365B715C7A80F6FAB6D16F6A63E66CB0DFB42F011F9709F100A83F293272EF37",
-      "legacy_ldt_key": "107E9174D2039ADE3FA763F914B884F8128B42782877BA8F1882EA5641466288EE5F34A0C873819C48C47DCEBD116539B3471106DB8FF7BA69D1AEDA21125503",
-      "legacy_metadata_iv": "38A24094FE8CB64794EB3A38",
-      "legacy_metadata_key_hmac_key": "7BF723A7822B795A9FE44058E4227EEC90B283C31B228C6766B13ED03651DF38"
+      "extended_metadata_nonce": "9D465DB8703FD644B14B99E1",
+      "extended_signed_metadata_key_hmac_key": "14BA9DEE1626741059F8B6D426CF83FCE010C26124E5AC9D66925D3B89EE2BB1",
+      "extended_signed_section_aes_key": "591995C12F75A6D28673E9BA651BF099",
+      "extended_unsigned_metadata_key_hmac_key": "7BCCE36CAE2D834C397513EA6C8F90026A1108A856285F9106B38319EFC9FF9C",
+      "extended_unsigned_section_aes_key": "A5A156C9EC17E50D3D4D5DABB63CCBA7",
+      "extended_unsigned_section_mic_hmac_key": "EBCEE2B687E58DD608CA3BE824C5465BB325FF602E30DAEBB2F2544DAABEF580",
+      "key_seed": "6EF7F1684C5C353B4ECDB1EEFDC10C34CF78B9E60D067EC7DB769595F8914CD8",
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     },
     "legacy_adv_salt_hkdf": {
-      "adv_salt": "C12D",
-      "expanded_salt": "1EC182E88A3D4DE1C3500B19202ED6CF"
+      "adv_salt": "0E4A",
+      "expanded_salt": "45841BEF518D55BC872449D35B69D3D3"
     },
     "legacy_metadata_key_hkdf": {
-      "expanded_key": "E0550B06344CC003692E5DB4E368B98F",
-      "legacy_metadata_key": "FE76E5667AF042F4C95EF2B29E3F"
+      "expanded_key": "07BE6AE936B1ED68B3823A6893702467",
+      "legacy_metadata_key": "0C15537A85CACDC26F26019ED439"
     }
   },
   {
     "extended_section_salt_hkdf": {
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-      "derived_salt_first_section_no_de": "4A488B2CC479C3C778EF732C69F95D01",
-      "derived_salt_first_section_third_de": "74898B8A456A4FA1D6F015979F97D200",
-      "section_salt": "BEF11A33ECF7978DED3ACB61CFD53D6A"
+      "derived_salt_first_section_first_de": "3DE9D56F37147C866D25DF4D1EC6E854",
+      "derived_salt_first_section_no_de": "2FDE5B60AFED59C1CF366A514FBBACA3",
+      "derived_salt_first_section_third_de": "AF10E5F3A5DF61DE19420E75E55D12BD",
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     "key_seed_hkdf": {
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-      "extended_unsigned_metadata_key_hmac_key": "F17352A5AFED36EB5B6BA3A43A9B04AF0C619CA31CC6E26F11D7C5C6BBD81B96",
-      "extended_unsigned_section_aes_key": "F8C7D1D5D9979343C0C71AC4D697893E",
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-      "legacy_metadata_key_hmac_key": "A6E914497E4FB2A580A098ECBB6A11672FF0F84C825053FE587BABBD60400E83"
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+      "extended_unsigned_section_aes_key": "8AEF9D42C27067B232BEA8242FE93F3D",
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     "legacy_adv_salt_hkdf": {
-      "adv_salt": "32EA",
-      "expanded_salt": "37B0BA6005F002664F64EEEAA5AA7384"
+      "adv_salt": "BD8B",
+      "expanded_salt": "F3078BA520F2080B927ADF89CF273A18"
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     "legacy_metadata_key_hkdf": {
-      "expanded_key": "FF0A7CA91B8C8BEE57040EBFE4174A38",
-      "legacy_metadata_key": "8DFCC55FE24A313D9C5D87697581"
+      "expanded_key": "DDACF0C5D556F78DE46253E77A85ACFF",
+      "legacy_metadata_key": "9732F406F870342BEE8B0A914078"
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     "extended_section_salt_hkdf": {
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-      "derived_salt_first_section_no_de": "1DA1589D2533E9555CFFFAE3F107CD84",
-      "derived_salt_first_section_third_de": "B11108E0D921D58A9B805054420FF85F",
-      "section_salt": "3F4ADB1253E4D8799287D9498BFFD1BC"
+      "derived_salt_first_section_first_de": "EB86DD1685C8017EAACF542B7A32C154",
+      "derived_salt_first_section_no_de": "2E1D91452B6BE755CA6D1A510B786F95",
+      "derived_salt_first_section_third_de": "3F6795CB4E05C03486FBAD12D98543FF",
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     "key_seed_hkdf": {
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-      "legacy_metadata_key_hmac_key": "2C2DA2B5B306C9DE435AED5EC06095A11AD0D9B0215D334FC4989DA81A7F1129"
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+      "extended_unsigned_section_aes_key": "C38BC169874FB5551DEA99A853A3242C",
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+      "key_seed": "8062D40BA07D2331C15DB4F4992D45A4C500350EB2B4DE00BF5EBBCE396A96E7",
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     "legacy_adv_salt_hkdf": {
-      "adv_salt": "F547",
-      "expanded_salt": "75B724D60730D0706E8F3282AE4D49D1"
+      "adv_salt": "2D7F",
+      "expanded_salt": "3C48F27B1F13EE4BD87F817785EF7703"
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     "legacy_metadata_key_hkdf": {
-      "expanded_key": "9E7919315017BE4C579879B942D43CBF",
-      "legacy_metadata_key": "F3E4302304959752A6437CFA03CB"
+      "expanded_key": "50979493AC77E7C48BABD922BBBF9775",
+      "legacy_metadata_key": "EC8D649AF82B50E56F7E5F2C1426"
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     "extended_section_salt_hkdf": {
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-      "derived_salt_first_section_no_de": "DA92B1F3351942133E161377146EECF8",
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-      "section_salt": "A97177E42EEF5BAA6979F4423B5154C5"
+      "derived_salt_first_section_first_de": "D262A02E3A58DF486E345BEC4A2B5D4F",
+      "derived_salt_first_section_no_de": "9E106096FF44973E527F2F7CBBB68275",
+      "derived_salt_first_section_third_de": "F9B9F4D9CBCB69C7A00DA254229D4BF3",
+      "section_salt": "4496838ABE23AA21C0CA736114A37BD6"
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     "key_seed_hkdf": {
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-      "legacy_metadata_key_hmac_key": "44F0A7D296863E2D559B4A2D64141EABA13316CD7627D465C691E77D2D0D1E08"
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+      "extended_signed_section_aes_key": "AC9B94AC20F1D81E1D1DEC0684E36297",
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+      "extended_unsigned_section_mic_hmac_key": "6D9373A7A34B9072FA386B06725B4BEF851EEEE601907991C5D2D51500356F2E",
+      "key_seed": "EA366AAA629102AB6B62305B92BFF85C878A1E7536C2057444C989AA68370138",
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+      "legacy_metadata_nonce": "B90108EF65B54923459A2B9F"
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     "legacy_adv_salt_hkdf": {
-      "adv_salt": "3E4B",
-      "expanded_salt": "17DA8589579BA4C772587D2AB8DED8A4"
+      "adv_salt": "5203",
+      "expanded_salt": "A3A47B0B38AB2899441F905548251625"
     },
     "legacy_metadata_key_hkdf": {
-      "expanded_key": "A4B273638D85980558505A73E644E62D",
-      "legacy_metadata_key": "56DEB786587211837BCB724BA229"
+      "expanded_key": "BB0BAE62AFF2FE5A6E20B8D581A272DE",
+      "legacy_metadata_key": "DF9B54563110C3D424C36C7A0B12"
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   {
     "extended_section_salt_hkdf": {
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-      "derived_salt_first_section_no_de": "8DD2D967C0990825E44588FDF9986CAC",
-      "derived_salt_first_section_third_de": "BD92E95FB9CFCA1D96567180A686818F",
-      "section_salt": "11FE39535255DD3B618D4BFEA71DF39A"
+      "derived_salt_first_section_first_de": "9794C1A08CF2F8E1E64FC53A89C81798",
+      "derived_salt_first_section_no_de": "899E09BEA7E181371FC7DB3E064B93BC",
+      "derived_salt_first_section_third_de": "BDA3B1732F5E0E7F2D0E8F3EA79402FD",
+      "section_salt": "82CF94C9A74170CDB84C8132E0A9AA25"
     },
     "key_seed_hkdf": {
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-      "extended_signed_metadata_key_hmac_key": "BD472C2657843E31B17406EB44CFB3393BCECFE32C0C379C72D30D4CD9BD123F",
-      "extended_signed_section_aes_key": "3B2288569726C70F3A787A16154B5835",
-      "extended_unsigned_metadata_key_hmac_key": "DF10CA1D06963A925E0716B5E370EC99CEBD4D2986486DCBB39163B3ED8D017F",
-      "extended_unsigned_section_aes_key": "45C5B3A0DD35D02192467564B622CB9D",
-      "extended_unsigned_section_mic_hmac_key": "77D5B001FA0966C81D99C9E621EFA9A75064C2C336589E94E0C58CA4C01EB833",
-      "key_seed": "9D4A7B8030B63936A1273CEBE0DF2F244F68A59BC51D0E26E444412E5720BFF5",
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-      "legacy_metadata_key_hmac_key": "6884FA4758B6687CB6A4E910032EB9CB8F055E6C56F0CD1B7BAA5A775AFCDBC3"
+      "extended_metadata_nonce": "9E2E62CFF064E5688C2B785E",
+      "extended_signed_metadata_key_hmac_key": "397D11E6EE958656F2674EF69001146BEE0F972C497C92C71914B90F908228F7",
+      "extended_signed_section_aes_key": "C5AB5145752AA16E3C65C6EFE561EC9C",
+      "extended_unsigned_metadata_key_hmac_key": "EAB5C3F841C81AE3394987D3AE876D5043778BB711A191C36BBCCEF42CA3FF6A",
+      "extended_unsigned_section_aes_key": "E9B70118BF8A4D58A758F1B3FA1661AC",
+      "extended_unsigned_section_mic_hmac_key": "B3E6D61C78A8867BDD3F33404218279D13F6F89059671DED0E8D4EE34C7FB5D2",
+      "key_seed": "F61539C310341BFDA73F7D9504502B785A27BD555E2A4B80BCE329AB213522D0",
+      "legacy_ldt_key": "2D427E218733944B5F784EBE48E0DA05A515BE4D4D6C56FF79E36661F2DDDD8D6ACEB11FBB0F7C9DFA18EABF0BB2FA96F093F0D599DBFE357265DC5A6C860ECB",
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+      "legacy_metadata_nonce": "D3B81B8D52920BB3D47EC5BD"
     },
     "legacy_adv_salt_hkdf": {
-      "adv_salt": "FB80",
-      "expanded_salt": "5CAC916076A54F837FDBE24005A4528F"
+      "adv_salt": "2037",
+      "expanded_salt": "E1430F688FBB46C8F6067E50A1F4B296"
     },
     "legacy_metadata_key_hkdf": {
-      "expanded_key": "7057CADCCE44487324E93B66B215FEF7",
-      "legacy_metadata_key": "0F7BC7ADABB79EE81EF52AF1DAAB"
+      "expanded_key": "1D4C9F7C2CE767CDAAF1F2E2CC9E56D4",
+      "legacy_metadata_key": "8A521A8E6FD14285498B5DEC2A79"
     }
   },
   {
     "extended_section_salt_hkdf": {
-      "derived_salt_first_section_first_de": "A8806F6EF812768C411290E6ABAD0CCB",
-      "derived_salt_first_section_no_de": "31BC2CAAE6623DDDAA0BA4BF3BC120A6",
-      "derived_salt_first_section_third_de": "F79FB8D29634E5FCA0D1A99B998558F8",
-      "section_salt": "30ED2B226A4FC8A9138AB3F11CB9E166"
+      "derived_salt_first_section_first_de": "4363CB3C7259246F4B123095550EE704",
+      "derived_salt_first_section_no_de": "6E95B9CFB044108DE5EABDDD098667A4",
+      "derived_salt_first_section_third_de": "F4441684E3A1C584AE218220C5823D63",
+      "section_salt": "4FB82CF0A6F46347DE465EF01BEF9DC7"
     },
     "key_seed_hkdf": {
-      "extended_metadata_iv": "8AC2138BA0641D3F4A06DC8C",
-      "extended_signed_metadata_key_hmac_key": "33993AA78C3456978BD5A8F37446E614809F26C11B3A209DAFD8A30B67FBCF51",
-      "extended_signed_section_aes_key": "CE576AF562359037A3788DCBF8A187FB",
-      "extended_unsigned_metadata_key_hmac_key": "469BE4A50338021B01451B63BA92B3307EAB409BC569DA04AF31B121C8B9E2CA",
-      "extended_unsigned_section_aes_key": "F5EEAEC478583D4EB9E4138AEC83DB44",
-      "extended_unsigned_section_mic_hmac_key": "C17377ACD9CEAC28021518F25F56C53DE5BAF51B3678393E853B4B5EE80A75E1",
-      "key_seed": "7779D82148A53FAB3FB7518DCCD637961F1913B80415080E1A278A6990BD0479",
-      "legacy_ldt_key": "A62D3E21B30D7A86367F6EDEF357ECB86A337E4DC2B21D6B1B63BBDCB3E37C79449CAE12C63420D8BC02E89A02A40FA64433C4B45B029D9E38AABC828016B8AC",
-      "legacy_metadata_iv": "882ABD49FBCBC7E6A56A1A7B",
-      "legacy_metadata_key_hmac_key": "884CA611D4F6533DF61282EE9668C99F444077550DD244A2A05063A500511162"
+      "extended_metadata_nonce": "7F8B9AF9663AE92297910F2F",
+      "extended_signed_metadata_key_hmac_key": "12328EBBAC73837BAC2D4B82D2EB0943C41F11DEA46B6562C1992B49F91D78F4",
+      "extended_signed_section_aes_key": "DB11AC0C3FBD6B105EB4ECF65440F2BF",
+      "extended_unsigned_metadata_key_hmac_key": "D8A37BEB7EC0DB54ABEA9C4A05616090ADE42C3C255949698690C5D38D683627",
+      "extended_unsigned_section_aes_key": "AF42DDA012ADF8A795EE4A7B15DAA081",
+      "extended_unsigned_section_mic_hmac_key": "48EA765212AD49D3527D56554149629C969AE888F1D681DEAFE78CB0F0EAF658",
+      "key_seed": "E615EDD2FD82BB47855C4BE869BFC649E0BD0EF7A15EB0C8F99E5884156711DB",
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     "legacy_adv_salt_hkdf": {
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-      "expanded_salt": "D94A5CA76C646923C3B6CE79732F1785"
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     "legacy_metadata_key_hkdf": {
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-      "legacy_metadata_key": "AE8B71C17C21E19BA03AC90703BF"
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     "extended_section_salt_hkdf": {
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-      "section_salt": "F641C7BA2C5336AE482D9E9E4951D976"
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     "legacy_adv_salt_hkdf": {
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     "legacy_metadata_key_hkdf": {
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-      "legacy_metadata_key": "44E7845DBF45C0D401D9B2FFB88A"
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-      "section_salt": "12EE359AC73A15F883DB557DC87415E4"
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     "legacy_adv_salt_hkdf": {
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-      "expanded_salt": "57F7D2787C534B002149B04F2D54BA55"
+      "adv_salt": "355E",
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     "legacy_metadata_key_hkdf": {
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-      "legacy_metadata_key": "11C5119B843BFC87D991015E691B"
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     "extended_section_salt_hkdf": {
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-      "section_salt": "79EB8A31D14BD7108971D370A86CBF48"
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+      "derived_salt_first_section_no_de": "33440FBB64C6BAB6453F7F9A050FFEB5",
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     "legacy_adv_salt_hkdf": {
-      "adv_salt": "C365",
-      "expanded_salt": "05DA1369E391A945A442C2CC3676FBB2"
+      "adv_salt": "9909",
+      "expanded_salt": "AB6B101F206D124E8B55520349C8F4DC"
     },
     "legacy_metadata_key_hkdf": {
-      "expanded_key": "45C2DDECD0878836FC197AFEC13BA0DB",
-      "legacy_metadata_key": "484A9CE8ED985FA194DD77D2354F"
+      "expanded_key": "DF7EC5214955F4A2666598DBCBC1337B",
+      "legacy_metadata_key": "B37A8ED8D672D20361D8F3D51AAB"
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     "extended_section_salt_hkdf": {
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-      "derived_salt_first_section_no_de": "88AF8A64211CFC722662E77DBA461D77",
-      "derived_salt_first_section_third_de": "D43759A61592FF6F89D40B9D1507C8BD",
-      "section_salt": "9D57DA5A3766B0B13598557147CF67F6"
+      "derived_salt_first_section_first_de": "CAF806EE61C9F98C033B6CE648B0A9AA",
+      "derived_salt_first_section_no_de": "7656E7E7B214432B15B30F17901A592C",
+      "derived_salt_first_section_third_de": "DAAF85C2FF8DCA2EEAB6524A94EB001A",
+      "section_salt": "DB0B46A3A5A38945744BC413851D8452"
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     "key_seed_hkdf": {
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-      "legacy_metadata_key_hmac_key": "8F4117950AE3DC2AD7B94B86BFCD32B775BBABF2AF3F23704D00FF07E815127C"
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+      "key_seed": "2E84B9175D2AF64DCF5592A6CE6A600430F36D1E326268C8628A0790CB832637",
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+      "legacy_metadata_nonce": "6643257603952C875B40D527"
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     "legacy_adv_salt_hkdf": {
-      "adv_salt": "1CFB",
-      "expanded_salt": "55C3EEFD3914400533947F78553BB046"
+      "adv_salt": "0518",
+      "expanded_salt": "F5CB5C30716D50337E3597A008774306"
     },
     "legacy_metadata_key_hkdf": {
-      "expanded_key": "5CB940FD9AF7E93EA90A67A5A4843963",
-      "legacy_metadata_key": "5DDFA82F682B6152068EEA66E80E"
+      "expanded_key": "C7437CB6E1910745E1D5F85217DE6C3B",
+      "legacy_metadata_key": "836B4F0F57011DEE3EF79471A08A"
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     "extended_section_salt_hkdf": {
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-      "derived_salt_first_section_no_de": "47E0496BC33E8B8C8A4AF6A734A643F0",
-      "derived_salt_first_section_third_de": "86D648E1E152BBFADEA671F103A362AD",
-      "section_salt": "4BBAB645842FA8A2683641BF61183A55"
+      "derived_salt_first_section_first_de": "509E424CBCC5964DC827CD736417FDA6",
+      "derived_salt_first_section_no_de": "8269B8D8C65B9F7519F17EA1B501DCF2",
+      "derived_salt_first_section_third_de": "313C4472E5BF2EC6F08F8E407433E2D5",
+      "section_salt": "0C98C48D64771BD607BEE3CFA873E048"
     },
     "key_seed_hkdf": {
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-      "legacy_metadata_key_hmac_key": "5F8B72BCA721EED01EB349A11FBCD307DE8028C320B0B7D71C0CF2CFA31DC9E0"
+      "extended_metadata_nonce": "44F203FA2E7FC2E7DE0985A6",
+      "extended_signed_metadata_key_hmac_key": "077688F727BAADA52A42D5F4C5DE0FB10028190F68A2950BD1B622A8810A4F84",
+      "extended_signed_section_aes_key": "74959A95D5FE867B35646442EE2367F0",
+      "extended_unsigned_metadata_key_hmac_key": "6F5E34C56135FDACC90EDD77AB27D40C583689FDA915AD2B3E053FB287A9B7C9",
+      "extended_unsigned_section_aes_key": "BFBA8DDD3768E1475F6C2C8167DE2ED7",
+      "extended_unsigned_section_mic_hmac_key": "7723F9AA8F4694412A19AAF981149B03F332C2CA84EE7A7EA30F0A6CFFE8DF5F",
+      "key_seed": "C2F7D2B6C8A814B76198CC2838B787E70BE404B7F30C2D3300F00657FF15D4D7",
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-    "legacy_adv_salt_hkdf": {
-      "adv_salt": "4C22",
-      "expanded_salt": "CD422A78CC6934E8048627D0DC5A51E8"
-    },
-    "legacy_metadata_key_hkdf": {
-      "expanded_key": "5B6DA9777BB0F17BE4B5A8D2C0262F79",
-      "legacy_metadata_key": "B49B90073C14F75E776467A5D878"
-    }
-  },
-  {
-    "extended_section_salt_hkdf": {
-      "derived_salt_first_section_first_de": "E62F1DD973CDC266C90EE4DF1036CF75",
-      "derived_salt_first_section_no_de": "44AA57AD631EC7389666DCEA77C294CA",
-      "derived_salt_first_section_third_de": "4AA23D95D88163A59BF74F676743E3B9",
-      "section_salt": "61865816B112335B3A6E5B9F2445921B"
-    },
-    "key_seed_hkdf": {
-      "extended_metadata_iv": "20A7AA32ED0A512B3BCC605A",
-      "extended_signed_metadata_key_hmac_key": "82FD31BEEF23B964326D45A46076C70BB6F707CF948D131CAE86BC9031033C9C",
-      "extended_signed_section_aes_key": "136A5015AFEB53C7C1E53094D353AA8A",
-      "extended_unsigned_metadata_key_hmac_key": "FB87972B043D852133DC11C6E5C2E425B52D81142F4948F006293EF45C91A727",
-      "extended_unsigned_section_aes_key": "509EEE6F41367BD6C91826058F3C804B",
-      "extended_unsigned_section_mic_hmac_key": "3CCCC109B453EAB34B815EA0CF8CAC9CBC00B7361C91E2DE2CEAD4CB1AC821E6",
-      "key_seed": "B526AD2760DDBFD936C8AA210DC639AB3346D66465D186A5526AEB8658785BFB",
-      "legacy_ldt_key": "AF7C0C71D57E804A00D7D4369229D985527DEE781446BC3269C4F20C95722CCD42026D91DED4A7FD5D96ABA1CB5DD159A6FE9D4785FFAB77807EF7EE9F3AFDD6",
-      "legacy_metadata_iv": "797FEA0E985896CE37BD7F00",
-      "legacy_metadata_key_hmac_key": "21C57981D41632066BC7035688F8B9D2B84FB1D611D809B83B0AC82339D122AE"
-    },
-    "legacy_adv_salt_hkdf": {
-      "adv_salt": "8CC8",
-      "expanded_salt": "5931A58109AF39C5BE43ECDEED5F30ED"
-    },
-    "legacy_metadata_key_hkdf": {
-      "expanded_key": "956BCB112425851760306F974C9C9B40",
-      "legacy_metadata_key": "A5996CA8E9E500EB753B723DDE5B"
-    }
-  },
-  {
-    "extended_section_salt_hkdf": {
-      "derived_salt_first_section_first_de": "D2BB78F9B65F67E6FDAF3C1BA7C39759",
-      "derived_salt_first_section_no_de": "96B86876AFF59AD1DD42C4501E13819B",
-      "derived_salt_first_section_third_de": "933A348AB95FB4E839231E8A16A53AC1",
-      "section_salt": "2D502CC76C1524CBF2A6EFD7A6C90239"
-    },
-    "key_seed_hkdf": {
-      "extended_metadata_iv": "9AEB678729C0E55B26A3AF5F",
-      "extended_signed_metadata_key_hmac_key": "80AD9EF5A11DD84ABDBEA79C68A307F5F9393EDC22F43676C71AA48151B74186",
-      "extended_signed_section_aes_key": "32A60372DA2CA70E7502A3E249AB8CE4",
-      "extended_unsigned_metadata_key_hmac_key": "4900684961433FC36AF2FEBD236480C13F673C83F28C53A0DF426E8188E0D0D3",
-      "extended_unsigned_section_aes_key": "1E9E187715BD8029B2F9D862943ABB13",
-      "extended_unsigned_section_mic_hmac_key": "F2158057F34E16DC70C8A19515A5E9CAF890AAC267CFF3183A6BDE15B4708DB6",
-      "key_seed": "8FB981E265DC933999E83327E1AB92BDB9EFB48C8FF54E45A237BF95BC885F79",
-      "legacy_ldt_key": "05C194D0652EF200F66A7D23CA9E829484244A26F50EF1B7EEA25214B2E009A0B213D2288F5514A2A00351E021B4E9EC0A5240BC0BE38B372264AFA8606B956D",
-      "legacy_metadata_iv": "8F7FA54257F2F7EF29DFFC4C",
-      "legacy_metadata_key_hmac_key": "4DBBBEA2E074E11D3F54B634AE6F75983843AC3FB428CCF79F622B3D37384DD6"
-    },
-    "legacy_adv_salt_hkdf": {
-      "adv_salt": "9761",
-      "expanded_salt": "0F07475E4EE655ECDB6A84BF6FD5622C"
-    },
-    "legacy_metadata_key_hkdf": {
-      "expanded_key": "5F76BA56B7E91999F969677E909D6BA2",
-      "legacy_metadata_key": "8AAE84B7B19D3CBD7B8C25055B27"
-    }
-  },
-  {
-    "extended_section_salt_hkdf": {
-      "derived_salt_first_section_first_de": "E9D58C4EC567A2C6EBA8304EFAECAC1E",
-      "derived_salt_first_section_no_de": "1DBF230F4145620EB9EF36559A163D21",
-      "derived_salt_first_section_third_de": "13DFF359E4A76019DBBE475CA78D7E32",
-      "section_salt": "E11511067A624355848C5904B88CB04F"
-    },
-    "key_seed_hkdf": {
-      "extended_metadata_iv": "34A55582712D99B4EB3BABAF",
-      "extended_signed_metadata_key_hmac_key": "10743B50FF515DD93F4475B89A0F56F36384D256C0D05FE72A0DECF2431FDA72",
-      "extended_signed_section_aes_key": "FDDC553CDECA218343270D929FC60B00",
-      "extended_unsigned_metadata_key_hmac_key": "E7F4F53507C4CE9E6B71D9CCDC61DF65C6D37412C80813A5E38D0F43246DD3BC",
-      "extended_unsigned_section_aes_key": "9078301052192B11654D06C21F7344DB",
-      "extended_unsigned_section_mic_hmac_key": "F13B170C5553D5FBA91FCEA2538A6C41BF189735E064D1E8D3FE72E3CEF327A7",
-      "key_seed": "1787EDD62CB2AE35D9CA3E58664F7EAA0943ADB6408EE7DACD03D69BFB71950D",
-      "legacy_ldt_key": "A5D3C3CDA51C29156F8559D7240EA7BB9978C512C37F917E01FE3D0737CB3A583E484D22431A31D6862C1EE1B9B2EA8F8F53DF93994F5DBD39D80E4945672440",
-      "legacy_metadata_iv": "6E2F4EFDDD8EB5956D64E032",
-      "legacy_metadata_key_hmac_key": "6D7502650A0FC4FC4B5A121A3530B64C670DF30129FDF2A3DB208A9E73EC6119"
-    },
-    "legacy_adv_salt_hkdf": {
-      "adv_salt": "5CAC",
-      "expanded_salt": "6286C892C789E707D5FC4F7ECF295758"
-    },
-    "legacy_metadata_key_hkdf": {
-      "expanded_key": "3A6CA8878EEA4C9780A4CD56DF6EEF9F",
-      "legacy_metadata_key": "09120637CB232A416770C120E7B8"
-    }
-  },
-  {
-    "extended_section_salt_hkdf": {
-      "derived_salt_first_section_first_de": "4C1459C08D03611726FCC72571D92FA9",
-      "derived_salt_first_section_no_de": "7FFC521FCA71B26C810B8A8105595E6C",
-      "derived_salt_first_section_third_de": "1EDAFA7D120A008A329EA66B53065C13",
-      "section_salt": "FEAAA8F6CA4148428F07867873E7363A"
-    },
-    "key_seed_hkdf": {
-      "extended_metadata_iv": "32FB758913476CDEDB73730B",
-      "extended_signed_metadata_key_hmac_key": "EA12527AC48115C847FAB2A3B06AA38DFC9AE7C181561500DDBF582210C15CB0",
-      "extended_signed_section_aes_key": "3ADFF816D9C7CF0E0C24B5D28DA43CC2",
-      "extended_unsigned_metadata_key_hmac_key": "9E7DB36A13353175552C21A8CCC26CD5DB59AAF78508EE95A819308E22264A5B",
-      "extended_unsigned_section_aes_key": "9EDC7CC6C38442E036935667C17813D1",
-      "extended_unsigned_section_mic_hmac_key": "04BCFC0C5A5B8E4189BBABF0158CDCD12565E3D0BABEF8A0A8540B18E924776D",
-      "key_seed": "9417ADE49361BEF9E554243A6E7F0DC321CE813A4041EAE974E2E98A596A8884",
-      "legacy_ldt_key": "6CA03A262A1F95E6DDC28B4477169965D8EB99918806B3A3F549F8F9DE3F7C56F9B8130976A6530E9DFE00AA547E32433A5FE714324F043B71FEC01E40EED204",
-      "legacy_metadata_iv": "80F123026A36CF71A3D29760",
-      "legacy_metadata_key_hmac_key": "6A4FF1BD14E38BCEEC956BE0249EB47DAA0BB20EC0DC9D22DF8BA3171CEE8194"
-    },
-    "legacy_adv_salt_hkdf": {
-      "adv_salt": "FE2B",
-      "expanded_salt": "5E7AF0BB00C7AC8BF009F3D6590F9006"
-    },
-    "legacy_metadata_key_hkdf": {
-      "expanded_key": "21870BFE2E25D3485DD2BB055999B8BB",
-      "legacy_metadata_key": "215704DCD36B6FDEDA6B748DA5CE"
+      "expanded_key": "15896E896566D60C3810FAADC94A05CE",
+      "legacy_metadata_key": "C08895650105CE9C165A9BCA08D8"
     }
   }
-]
+]
\ No newline at end of file
diff --git a/nearby/presence/np_hkdf/src/lib.rs b/nearby/presence/np_hkdf/src/lib.rs
index c33e802..f4f98eb 100644
--- a/nearby/presence/np_hkdf/src/lib.rs
+++ b/nearby/presence/np_hkdf/src/lib.rs
@@ -27,6 +27,8 @@
 )]
 
 extern crate core;
+#[cfg(feature = "std")]
+extern crate std;
 
 use core::marker;
 use crypto_provider::{aes::Aes128Key, hkdf::Hkdf, hmac::Hmac, CryptoProvider};
@@ -68,23 +70,31 @@
         hmac.update(data);
         hmac.finalize()
     }
+
+    /// Build an HMAC, update it with the provided `data`, and verify it.
+    ///
+    /// This is convenient for one-and-done HMAC usage rather than incrementally accumulating
+    /// the final MAC.
+    pub fn verify_hmac(
+        &self,
+        data: &[u8],
+        expected_mac: [u8; 32],
+    ) -> Result<(), crypto_provider::hmac::MacError> {
+        let mut hmac = self.build_hmac();
+        hmac.update(data);
+        hmac.verify(expected_mac)
+    }
 }
 
 impl<C: CryptoProvider> From<[u8; 32]> for NpHmacSha256Key<C> {
     fn from(key: [u8; 32]) -> Self {
-        Self {
-            key,
-            c_phantom: Default::default(),
-        }
+        Self { key, c_phantom: Default::default() }
     }
 }
 
 impl<C: CryptoProvider> Clone for NpHmacSha256Key<C> {
     fn clone(&self) -> Self {
-        Self {
-            key: self.key,
-            c_phantom: Default::default(),
-        }
+        Self { key: self.key, c_phantom: Default::default() }
     }
 }
 
@@ -93,99 +103,79 @@
 
 /// A wrapper around an NP key seed for deriving HKDF-SHA256 sub keys.
 pub struct NpKeySeedHkdf<C: CryptoProvider> {
-    hkdf: C::HkdfSha256,
+    hkdf: NpHkdf<C>,
 }
 
 impl<C: CryptoProvider> NpKeySeedHkdf<C> {
     /// Build an HKDF from a NP credential key seed
     pub fn new(key_seed: &[u8; 32]) -> Self {
-        Self {
-            hkdf: np_hkdf::<C>(key_seed),
-        }
+        Self { hkdf: NpHkdf::new(key_seed) }
     }
 
     /// LDT key used to decrypt a legacy advertisement
     #[allow(clippy::expect_used)]
     pub fn legacy_ldt_key(&self) -> ldt::LdtKey<xts_aes::XtsAes128Key> {
         ldt::LdtKey::from_concatenated(
-            &self
-                .hkdf_array(b"Legacy LDT key")
-                .expect("LDT key is a valid length"),
+            &self.hkdf.derive_array(b"Legacy LDT key").expect("LDT key is a valid length"),
         )
     }
 
     /// HMAC key used when verifying the raw metadata key extracted from an advertisement
-    #[allow(clippy::expect_used)]
     pub fn legacy_metadata_key_hmac_key(&self) -> NpHmacSha256Key<C> {
-        self.hkdf_array(b"Legacy metadata key verification HMAC key")
-            .expect("Hmac keys are a valid length")
-            .into()
+        self.hkdf.derive_hmac_sha256_key(b"Legacy metadata key verification HMAC key")
     }
 
-    /// AES-GCM IV used when decrypting metadata
+    /// AES-GCM nonce used when decrypting metadata
     #[allow(clippy::expect_used)]
-    pub fn legacy_metadata_iv(&self) -> [u8; 12] {
-        self.hkdf_array(b"Legacy Metadata IV")
-            .expect("IV is a valid length")
+    pub fn legacy_metadata_nonce(&self) -> [u8; 12] {
+        self.hkdf.derive_array(b"Legacy Metadata Nonce").expect("Nonce is a valid length")
     }
 
-    /// AES-GCM IV used when decrypting metadata.
+    /// AES-GCM nonce used when decrypting metadata.
     ///
     /// Shared between signed and unsigned since they use the same credential.
     #[allow(clippy::expect_used)]
-    pub fn extended_metadata_iv(&self) -> [u8; 12] {
-        self.hkdf_array(b"Metadata IV")
-            .expect("IV is a valid length")
+    pub fn extended_metadata_nonce(&self) -> [u8; 12] {
+        self.hkdf.derive_array(b"Metadata Nonce").expect("Nonce is a valid length")
     }
 
     /// HMAC key used when verifying the raw metadata key extracted from an advertisement
-    #[allow(clippy::expect_used)]
     pub fn extended_unsigned_metadata_key_hmac_key(&self) -> NpHmacSha256Key<C> {
-        self.hkdf_array(b"Unsigned Section metadata key HMAC key")
-            .expect("Hmac keys are a valid length")
-            .into()
-    }
-
-    /// AES128 key used when decrypting an extended unsigned section
-    #[allow(clippy::expect_used)]
-    pub fn extended_unsigned_section_aes_key(&self) -> Aes128Key {
-        self.hkdf_array(b"Unsigned Section AES key")
-            .expect("AES128 keys are a valid length")
-            .into()
-    }
-
-    /// HMAC-SHA256 key used when verifying an extended unsigned section
-    #[allow(clippy::expect_used)]
-    pub fn extended_unsigned_section_mic_hmac_key(&self) -> NpHmacSha256Key<C> {
-        self.hkdf_array(b"Unsigned Section HMAC key")
-            .expect("Hmac keys are a valid length")
-            .into()
+        self.hkdf.derive_hmac_sha256_key(b"Unsigned Section metadata key HMAC key")
     }
 
     /// HMAC key used when verifying the raw metadata key extracted from an extended signed advertisement
     #[allow(clippy::expect_used)]
     pub fn extended_signed_metadata_key_hmac_key(&self) -> NpHmacSha256Key<C> {
-        self.hkdf_array(b"Signed Section metadata key HMAC key")
-            .expect("Hmac keys are a valid length")
-            .into()
+        self.hkdf.derive_hmac_sha256_key(b"Signed Section metadata key HMAC key")
     }
 
     /// AES128 key used when decrypting an extended signed section
     #[allow(clippy::expect_used)]
     pub fn extended_signed_section_aes_key(&self) -> Aes128Key {
-        self.hkdf_array(b"Signed Section AES key")
-            .expect("AES128 keys are a valid length")
-            .into()
+        self.hkdf.derive_aes128_key(b"Signed Section AES key")
+    }
+}
+
+impl<C: CryptoProvider> UnsignedSectionKeys<C> for NpKeySeedHkdf<C> {
+    fn aes_key(&self) -> Aes128Key {
+        self.hkdf.derive_aes128_key(b"Unsigned Section AES key")
     }
 
-    /// Derive a length `N` array using the provided `info`
-    /// Returns None if N > 255 * 32.
-    fn hkdf_array<const N: usize>(&self, info: &[u8]) -> Option<[u8; N]> {
-        let mut arr = [0_u8; N];
-        self.hkdf.expand(info, &mut arr).map(|_| arr).ok()
+    fn hmac_key(&self) -> NpHmacSha256Key<C> {
+        self.hkdf.derive_hmac_sha256_key(b"Unsigned Section HMAC key")
     }
 }
 
+/// Derived keys for V1 MIC (unsigned) sections
+pub trait UnsignedSectionKeys<C: CryptoProvider> {
+    /// AES128 key used when decrypting an extended unsigned section
+    fn aes_key(&self) -> Aes128Key;
+
+    /// HMAC-SHA256 key used when verifying an extended unsigned section
+    fn hmac_key(&self) -> NpHmacSha256Key<C>;
+}
+
 /// Expand a legacy salt into the expanded salt used with XOR padding in LDT.
 #[allow(clippy::expect_used)]
 pub fn legacy_ldt_expanded_salt<const B: usize, C: CryptoProvider>(salt: &[u8; 2]) -> [u8; B] {
@@ -211,11 +201,41 @@
     info: &[u8],
 ) -> Option<[u8; N]> {
     let mut buf = [0; N];
-    let hkdf = np_hkdf::<C>(ikm);
+    let hkdf = np_salt_hkdf::<C>(ikm);
     hkdf.expand(info, &mut buf[..]).map(|_| buf).ok()
 }
 
-/// Build an HKDF using the NP HKDF salt and supplied ikm
-fn np_hkdf<C: CryptoProvider>(ikm: &[u8]) -> C::HkdfSha256 {
+/// Construct an HKDF with the Nearby Presence salt and provided `ikm`
+pub fn np_salt_hkdf<C: CryptoProvider>(ikm: &[u8]) -> C::HkdfSha256 {
     C::HkdfSha256::new(Some(NP_HKDF_SALT), ikm)
 }
+
+/// NP-flavored HKDF operations for common derived output types
+pub struct NpHkdf<C: CryptoProvider> {
+    hkdf: C::HkdfSha256,
+}
+
+impl<C: CryptoProvider> NpHkdf<C> {
+    /// Build an HKDF using the NP HKDF salt and supplied `ikm`
+    pub fn new(ikm: &[u8]) -> Self {
+        Self { hkdf: np_salt_hkdf::<C>(ikm) }
+    }
+
+    /// Derive a length `N` array using the provided `info`
+    /// Returns `None` if N > 255 * 32.
+    pub fn derive_array<const N: usize>(&self, info: &[u8]) -> Option<[u8; N]> {
+        let mut arr = [0_u8; N];
+        self.hkdf.expand(info, &mut arr).map(|_| arr).ok()
+    }
+
+    /// Derive an HMAC-SHA256 key using the provided `info`
+    #[allow(clippy::expect_used)]
+    pub fn derive_hmac_sha256_key(&self, info: &[u8]) -> NpHmacSha256Key<C> {
+        self.derive_array(info).expect("HMAC-SHA256 keys are a valid length").into()
+    }
+    /// Derive an AES-128 key using the provided `info`
+    #[allow(clippy::expect_used)]
+    pub fn derive_aes128_key(&self, info: &[u8]) -> Aes128Key {
+        self.derive_array(info).expect("AES128 keys are a valid length").into()
+    }
+}
diff --git a/nearby/presence/np_hkdf/src/v1_salt.rs b/nearby/presence/np_hkdf/src/v1_salt.rs
index acd118c..b139e84 100644
--- a/nearby/presence/np_hkdf/src/v1_salt.rs
+++ b/nearby/presence/np_hkdf/src/v1_salt.rs
@@ -13,7 +13,7 @@
 // limitations under the License.
 
 //! Salt used in a V1 advertisement.
-use crate::np_hkdf;
+use crate::np_salt_hkdf;
 use core::fmt;
 use crypto_provider::hkdf::Hkdf;
 use crypto_provider::CryptoProvider;
@@ -68,10 +68,7 @@
 
 impl<C: CryptoProvider> From<[u8; 16]> for V1Salt<C> {
     fn from(arr: [u8; 16]) -> Self {
-        Self {
-            data: arr,
-            hkdf: np_hkdf::<C>(&arr),
-        }
+        Self { data: arr, hkdf: np_salt_hkdf::<C>(&arr) }
     }
 }
 
@@ -110,9 +107,7 @@
     ///
     /// Does not handle overflow as there can't be more than 2^8 DEs in a section.
     pub const fn incremented(&self) -> Self {
-        Self {
-            offset: self.offset + 1,
-        }
+        Self { offset: self.offset + 1 }
     }
 }
 
diff --git a/nearby/presence/np_hkdf/tests/hmac.rs b/nearby/presence/np_hkdf/tests/hmac.rs
new file mode 100644
index 0000000..4ebef5a
--- /dev/null
+++ b/nearby/presence/np_hkdf/tests/hmac.rs
@@ -0,0 +1,42 @@
+// Copyright 2023 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+use crypto_provider::hmac::MacError;
+use crypto_provider_default::CryptoProviderImpl;
+use np_hkdf::*;
+
+#[test]
+fn verify_hmac_correct_mac() {
+    let data = &[1_u8; 32];
+    let hmac_key = [2; 32];
+
+    let hmac = NpHmacSha256Key::<CryptoProviderImpl>::from(hmac_key);
+
+    let mac = hmac.calculate_hmac(data);
+
+    assert_eq!(Ok(()), hmac.verify_hmac(data, mac));
+}
+
+#[test]
+fn verify_hmac_incorrect_mac() {
+    let data = &[1_u8; 32];
+    let hmac_key = [2; 32];
+
+    let hmac = NpHmacSha256Key::<CryptoProviderImpl>::from(hmac_key);
+
+    let _mac = hmac.calculate_hmac(data);
+
+    // wrong mac
+    assert_eq!(Err(MacError), hmac.verify_hmac(data, [0xFF; 32]));
+}
diff --git a/nearby/presence/np_hkdf/tests/test_vectors.rs b/nearby/presence/np_hkdf/tests/test_vectors.rs
index dd9dca4..380c107 100644
--- a/nearby/presence/np_hkdf/tests/test_vectors.rs
+++ b/nearby/presence/np_hkdf/tests/test_vectors.rs
@@ -48,12 +48,12 @@
                 hkdf.legacy_metadata_key_hmac_key().as_bytes()
             );
             assert_eq!(
-                extract_key_array::<12>(group, "legacy_metadata_iv"),
-                hkdf.legacy_metadata_iv()
+                extract_key_array::<12>(group, "legacy_metadata_nonce"),
+                hkdf.legacy_metadata_nonce()
             );
             assert_eq!(
-                extract_key_array::<12>(group, "extended_metadata_iv"),
-                hkdf.extended_metadata_iv()
+                extract_key_array::<12>(group, "extended_metadata_nonce"),
+                hkdf.extended_metadata_nonce()
             );
             assert_eq!(
                 &extract_key_array::<32>(group, "extended_unsigned_metadata_key_hmac_key"),
@@ -61,11 +61,11 @@
             );
             assert_eq!(
                 extract_key_array::<16>(group, "extended_unsigned_section_aes_key"),
-                *hkdf.extended_unsigned_section_aes_key().as_array()
+                *UnsignedSectionKeys::aes_key(&hkdf).as_array()
             );
             assert_eq!(
                 &extract_key_array::<32>(group, "extended_unsigned_section_mic_hmac_key"),
-                hkdf.extended_unsigned_section_mic_hmac_key().as_bytes()
+                UnsignedSectionKeys::hmac_key(&hkdf).as_bytes()
             );
             assert_eq!(
                 &extract_key_array::<32>(group, "extended_signed_metadata_key_hmac_key"),
@@ -125,7 +125,7 @@
 
     let mut array = Vec::<serde_json::Value>::new();
 
-    for _ in 0..1_000 {
+    for _ in 0..100 {
         let key_seed: [u8; 32] = rng.gen();
         let legacy_adv_salt: [u8; 2] = rng.gen();
         let legacy_metadata_key: [u8; 14] = rng.gen();
@@ -140,11 +140,11 @@
                     "legacy_ldt_key": hex::encode_upper(key_seed_hkdf.legacy_ldt_key().as_concatenated()),
                     "legacy_metadata_key_hmac_key":
                         hex::encode_upper(key_seed_hkdf.legacy_metadata_key_hmac_key().as_bytes()),
-                    "legacy_metadata_iv": hex::encode_upper(key_seed_hkdf.legacy_metadata_iv()),
-                    "extended_metadata_iv": hex::encode_upper(key_seed_hkdf.extended_metadata_iv()),
+                    "legacy_metadata_nonce": hex::encode_upper(key_seed_hkdf.legacy_metadata_nonce()),
+                    "extended_metadata_nonce": hex::encode_upper(key_seed_hkdf.extended_metadata_nonce()),
                     "extended_unsigned_metadata_key_hmac_key": hex::encode_upper(key_seed_hkdf.extended_unsigned_metadata_key_hmac_key().as_bytes()),
-                    "extended_unsigned_section_aes_key": hex::encode_upper(key_seed_hkdf.extended_unsigned_section_aes_key().as_array()),
-                    "extended_unsigned_section_mic_hmac_key": hex::encode_upper(key_seed_hkdf.extended_unsigned_section_mic_hmac_key().as_bytes()),
+                    "extended_unsigned_section_aes_key": hex::encode_upper(UnsignedSectionKeys::<CryptoProviderImpl>::aes_key(&key_seed_hkdf).as_array()),
+                    "extended_unsigned_section_mic_hmac_key": hex::encode_upper(UnsignedSectionKeys::<CryptoProviderImpl>::hmac_key(&key_seed_hkdf).as_bytes()),
                     "extended_signed_metadata_key_hmac_key": hex::encode_upper(key_seed_hkdf.extended_signed_metadata_key_hmac_key().as_bytes()),
                     "extended_signed_section_aes_key": hex::encode_upper(key_seed_hkdf.extended_signed_section_aes_key().as_array()),
                 },
diff --git a/nearby/presence/test_helper/src/lib.rs b/nearby/presence/test_helper/src/lib.rs
index ecb54c9..7c0694f 100644
--- a/nearby/presence/test_helper/src/lib.rs
+++ b/nearby/presence/test_helper/src/lib.rs
@@ -33,8 +33,7 @@
     let full_path = get_data_file(file);
     let mut file = fs::File::open(full_path).expect("Should be able to open data file");
     let mut data = String::new();
-    file.read_to_string(&mut data)
-        .expect("should be able to read data file");
+    file.read_to_string(&mut data).expect("should be able to read data file");
     data
 }
 
diff --git a/nearby/presence/xts_aes/Cargo.toml b/nearby/presence/xts_aes/Cargo.toml
index 72acf98..d0b88b6 100644
--- a/nearby/presence/xts_aes/Cargo.toml
+++ b/nearby/presence/xts_aes/Cargo.toml
@@ -4,6 +4,10 @@
 edition.workspace = true
 publish.workspace = true
 
+[features]
+default = []
+std = []
+
 [dependencies]
 array_ref.workspace = true
 crypto_provider.workspace = true
@@ -22,4 +26,4 @@
 regex.workspace = true
 
 aes.workspace = true
-xts-mode.workspace = true
\ No newline at end of file
+xts-mode.workspace = true
diff --git a/nearby/presence/xts_aes/src/lib.rs b/nearby/presence/xts_aes/src/lib.rs
index 1ffa813..ff68d76 100644
--- a/nearby/presence/xts_aes/src/lib.rs
+++ b/nearby/presence/xts_aes/src/lib.rs
@@ -27,6 +27,9 @@
 //! See NIST docs [here](https://luca-giuzzi.unibs.it/corsi/Support/papers-cryptography/1619-2007-NIST-Submission.pdf)
 //! and [here](https://nvlpubs.nist.gov/nistpubs/Legacy/SP/nistspecialpublication800-38e.pdf).
 
+#[cfg(feature = "std")]
+extern crate std;
+
 use array_ref::{array_mut_ref, array_ref};
 use core::fmt;
 use core::marker::PhantomData;
@@ -289,8 +292,7 @@
     fn encrypt(&self, tweak: Self::Tweak, block: &mut [u8; 16]) {
         // we're encrypting precisely one block, so the block number won't advance, and ciphertext
         // stealing will not be applied.
-        self.encrypt_data_unit(tweak, block)
-            .expect("One block is a valid size");
+        self.encrypt_data_unit(tweak, block).expect("One block is a valid size");
     }
 }
 
@@ -310,8 +312,7 @@
 
     #[allow(clippy::expect_used)]
     fn decrypt(&self, tweak: Self::Tweak, block: &mut [u8; 16]) {
-        self.decrypt_data_unit(tweak, block)
-            .expect("One block is a valid size");
+        self.decrypt_data_unit(tweak, block).expect("One block is a valid size");
     }
 }
 
@@ -364,10 +365,7 @@
 
     fn try_from(slice: &[u8]) -> Result<Self, Self::Error> {
         try_split_concat_key::<16>(slice)
-            .map(|(key_1, key_2)| Self {
-                key_1: key_1.into(),
-                key_2: key_2.into(),
-            })
+            .map(|(key_1, key_2)| Self { key_1: key_1.into(), key_2: key_2.into() })
             .ok_or_else(XtsKeyTryFromSliceError::new)
     }
 }
@@ -390,10 +388,7 @@
     // Allow index slicing, since a panic will be impossible to hit
     #[allow(clippy::indexing_slicing)]
     fn split_from_concatenated(key: &Self::ConcatenatedKeyArray) -> (Self, Self) {
-        (
-            (array_ref!(key, 0, 32)).into(),
-            (array_ref!(key, 32, 32)).into(),
-        )
+        ((array_ref!(key, 0, 32)).into(), (array_ref!(key, 32, 32)).into())
     }
 
     fn concatenate_with(&self, other: &Self) -> Self::ConcatenatedKeyArray {
@@ -431,10 +426,7 @@
 
     fn try_from(slice: &[u8]) -> Result<Self, Self::Error> {
         try_split_concat_key::<32>(slice)
-            .map(|(key_1, key_2)| Self {
-                key_1: key_1.into(),
-                key_2: key_2.into(),
-            })
+            .map(|(key_1, key_2)| Self { key_1: key_1.into(), key_2: key_2.into() })
             .ok_or_else(XtsKeyTryFromSliceError::new)
     }
 }
@@ -457,10 +449,7 @@
     // Allow index slicing, since a panic will be impossible to hit
     #[allow(clippy::indexing_slicing)]
     fn split_from_concatenated(key: &Self::ConcatenatedKeyArray) -> (Self, Self) {
-        (
-            (array_ref!(key, 0, 64)).into(),
-            (array_ref!(key, 64, 64)).into(),
-        )
+        ((array_ref!(key, 0, 64)).into(), (array_ref!(key, 64, 64)).into())
     }
 
     fn concatenate_with(&self, other: &Self) -> Self::ConcatenatedKeyArray {
@@ -507,9 +496,7 @@
 
 impl From<u128> for Tweak {
     fn from(n: u128) -> Self {
-        Self {
-            bytes: n.to_le_bytes(),
-        }
+        Self { bytes: n.to_le_bytes() }
     }
 }
 
@@ -525,10 +512,7 @@
 impl TweakState {
     /// Create a TweakState from the provided state with block_num = 0.
     fn new(tweak: [u8; 16]) -> TweakState {
-        TweakState {
-            block_num: 0,
-            tweak,
-        }
+        TweakState { block_num: 0, tweak }
     }
 
     /// Advance the tweak state in the data unit to the `block_num`'th block without encrypting
@@ -553,31 +537,17 @@
             // polynomial in F_2^128 (x^128 = x^7 + x^2 + x + 1 = 0) = 135 decimal.
             // % 128 is compiled as & !128 (i.e. fast).
             target[0] = (2
-                * (self
-                    .tweak
-                    .first()
-                    .expect("aes block must have non zero length")
-                    % 128))
+                * (self.tweak.first().expect("aes block must have non zero length") % 128))
                 ^ (135
                     * select_hi_bit(
-                        *self
-                            .tweak
-                            .get(15)
-                            .expect("15 is a valid index in an aes block"),
+                        *self.tweak.get(15).expect("15 is a valid index in an aes block"),
                     ));
             // Remaining bytes
             for (j, byte) in target.iter_mut().enumerate().skip(1) {
                 *byte = (2
-                    * (self
-                        .tweak
-                        .get(j)
-                        .expect("j is always in range of block size")
-                        % 128))
+                    * (self.tweak.get(j).expect("j is always in range of block size") % 128))
                     ^ select_hi_bit(
-                        *self
-                            .tweak
-                            .get(j - 1)
-                            .expect("j > 0 always because of the .skip(1)"),
+                        *self.tweak.get(j - 1).expect("j > 0 always because of the .skip(1)"),
                     );
             }
             self.tweak = target;
@@ -600,8 +570,7 @@
 
 impl<'a, A: Aes> XtsEncrypterTweaked<'a, A> {
     fn advance_to_next_block_num(&mut self) {
-        self.tweak_state
-            .advance_to_block(self.tweak_state.block_num + 1)
+        self.tweak_state.advance_to_block(self.tweak_state.block_num + 1)
     }
 
     /// Encrypt a block in place using the configured tweak and current block number.
@@ -624,8 +593,7 @@
 
 impl<'a, A: Aes> XtsDecrypterTweaked<'a, A> {
     fn advance_to_next_block_num(&mut self) {
-        self.tweak_state
-            .advance_to_block(self.tweak_state.block_num + 1)
+        self.tweak_state.advance_to_block(self.tweak_state.block_num + 1)
     }
 
     /// Get the current tweak state -- useful if needed to reset to an earlier block num.
@@ -653,11 +621,8 @@
     // hopefully this gets done smartly by the compiler (intel pxor, arm veorq, or equivalent).
     // This seems to happen in practice at opt level 3: https://gcc.godbolt.org/z/qvjE8joMv
     for i in 0..BLOCK_SIZE {
-        *base
-            .get_mut(i)
-            .expect("i is always a valid index for an AesBlock") ^= rhs
-            .get(i)
-            .expect("i is always a valid index for an AesBlock");
+        *base.get_mut(i).expect("i is always a valid index for an AesBlock") ^=
+            rhs.get(i).expect("i is always a valid index for an AesBlock");
     }
 }
 
@@ -668,13 +633,7 @@
 }
 
 fn try_split_concat_key<const N: usize>(slice: &[u8]) -> Option<([u8; N], [u8; N])> {
-    slice
-        .get(0..N)
-        .and_then(|slice| slice.try_into().ok())
-        .and_then(|k1: [u8; N]| {
-            slice
-                .get(N..)
-                .and_then(|slice| slice.try_into().ok())
-                .map(|k2: [u8; N]| (k1, k2))
-        })
+    slice.get(0..N).and_then(|slice| slice.try_into().ok()).and_then(|k1: [u8; N]| {
+        slice.get(N..).and_then(|slice| slice.try_into().ok()).map(|k2: [u8; N]| (k1, k2))
+    })
 }
diff --git a/nearby/presence/xts_aes/src/tweak_tests.rs b/nearby/presence/xts_aes/src/tweak_tests.rs
index b658fc1..d5ab462 100644
--- a/nearby/presence/xts_aes/src/tweak_tests.rs
+++ b/nearby/presence/xts_aes/src/tweak_tests.rs
@@ -11,12 +11,7 @@
 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 // See the License for the specific language governing permissions and
 // limitations under the License.
-#![allow(
-    clippy::indexing_slicing,
-    clippy::unwrap_used,
-    clippy::panic,
-    clippy::expect_used
-)]
+#![allow(clippy::indexing_slicing, clippy::unwrap_used, clippy::panic, clippy::expect_used)]
 
 extern crate std;
 
diff --git a/nearby/presence/xts_aes/tests/compare_with_xts_mode_test.rs b/nearby/presence/xts_aes/tests/compare_with_xts_mode_test.rs
index 92c5f78..94ed066 100644
--- a/nearby/presence/xts_aes/tests/compare_with_xts_mode_test.rs
+++ b/nearby/presence/xts_aes/tests/compare_with_xts_mode_test.rs
@@ -89,9 +89,7 @@
         // encrypt with our impl
         let mut ciphertext = plaintext.clone();
         let tweak: Tweak = rng.gen::<u128>().into();
-        xts_enc
-            .encrypt_data_unit(tweak.clone(), &mut ciphertext)
-            .unwrap();
+        xts_enc.encrypt_data_unit(tweak.clone(), &mut ciphertext).unwrap();
 
         // encrypt with the other impl
         let mut other_ciphertext = plaintext.clone();
diff --git a/nearby/presence/xts_aes/tests/xts_nist_test_vectors.rs b/nearby/presence/xts_aes/tests/xts_nist_test_vectors.rs
index 94b2c34..3d0cb50 100644
--- a/nearby/presence/xts_aes/tests/xts_nist_test_vectors.rs
+++ b/nearby/presence/xts_aes/tests/xts_nist_test_vectors.rs
@@ -74,26 +74,18 @@
         match tc.test_type {
             TestType::Encrypt => {
                 buf.extend_from_slice(&tc.plaintext);
-                xts_enc
-                    .encrypt_data_unit(tc.tweak.clone(), &mut buf)
-                    .unwrap();
+                xts_enc.encrypt_data_unit(tc.tweak.clone(), &mut buf).unwrap();
 
                 // check decryption too just for fun
-                xts_dec
-                    .decrypt_data_unit(tc.tweak.clone(), &mut buf)
-                    .unwrap();
+                xts_dec.decrypt_data_unit(tc.tweak.clone(), &mut buf).unwrap();
                 assert_eq!(tc.plaintext, buf, "count {}", tc.count);
             }
             TestType::Decrypt => {
                 buf.extend_from_slice(&tc.ciphertext);
-                xts_dec
-                    .decrypt_data_unit(tc.tweak.clone(), &mut buf)
-                    .unwrap();
+                xts_dec.decrypt_data_unit(tc.tweak.clone(), &mut buf).unwrap();
                 assert_eq!(tc.plaintext, buf, "count {}", tc.count);
 
-                xts_enc
-                    .encrypt_data_unit(tc.tweak.clone(), &mut buf)
-                    .unwrap();
+                xts_enc.encrypt_data_unit(tc.tweak.clone(), &mut buf).unwrap();
                 assert_eq!(tc.ciphertext, buf, "count {}", tc.count);
             }
         }
@@ -114,9 +106,9 @@
     // recently seen
     let mut test_type = None;
     let mut test_cases = Vec::new();
-    for parse_unit in (TestVectorFileIterator {
-        delegate: io::BufReader::new(file).lines().map(|r| r.unwrap()),
-    }) {
+    for parse_unit in
+        (TestVectorFileIterator { delegate: io::BufReader::new(file).lines().map(|r| r.unwrap()) })
+    {
         match parse_unit {
             ParseUnit::SectionHeader(s) => {
                 test_type = Some(match s.as_str() {
diff --git a/nearby/presence/xts_aes/tests/xts_roundtrip_tests.rs b/nearby/presence/xts_aes/tests/xts_roundtrip_tests.rs
index 93f61a8..0e28dfa 100644
--- a/nearby/presence/xts_aes/tests/xts_roundtrip_tests.rs
+++ b/nearby/presence/xts_aes/tests/xts_roundtrip_tests.rs
@@ -65,9 +65,7 @@
 
         let mut ciphertext = plaintext.clone();
         let tweak: Tweak = rng.gen::<u128>().into();
-        xts_enc
-            .encrypt_data_unit(tweak.clone(), &mut ciphertext)
-            .unwrap();
+        xts_enc.encrypt_data_unit(tweak.clone(), &mut ciphertext).unwrap();
 
         assert_eq!(plaintext.len(), ciphertext.len());
         assert_ne!(plaintext, ciphertext);
diff --git a/nearby/rustfmt.toml b/nearby/rustfmt.toml
new file mode 100644
index 0000000..10c1698
--- /dev/null
+++ b/nearby/rustfmt.toml
@@ -0,0 +1,3 @@
+edition = "2021"
+newline_style = "Unix"
+use_small_heuristics = "Max"
diff --git a/nearby/scripts/build-script.sh b/nearby/scripts/build-script.sh
deleted file mode 100755
index 5fc999e..0000000
--- a/nearby/scripts/build-script.sh
+++ /dev/null
@@ -1,279 +0,0 @@
-# Copyright 2022 Google LLC
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#      http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-
-# This script contains common functions which can be used to help when building
-# specific components of the beto-rust repo. To load these into your environment
-# run `source ./scripts/build-script.sh` Then run the functions from root
-# This can also be sourced to help when writing further build scripts
-
-export SCRIPT_DIR=$( cd -- "$( dirname -- "${BASH_SOURCE[0]}" )" &> /dev/null && pwd )
-
-# Use to generate headers for new source code files
-gen_headers() {
-  set -e
-  $HOME/go/bin/addlicense -c "Google LLC" -l apache -ignore=**/android/build/** -ignore=target/** \
-      -ignore=**/target/** -ignore=".idea/*" -ignore=**/cmake-build/** -ignore="**/java/build/**" \
-      -ignore="**/ukey2_c_ffi/cpp/build/**" .
-}
-
-# Checks the workspace 3rd party crates and makes sure they have a valid license
-check_crate_licenses(){
-    set -e
-    cd $SCRIPT_DIR/..
-    cargo deny --workspace check
-}
-
-# Checks everything in beto-rust
-check_everything(){
-  set -e
-  cd $SCRIPT_DIR/..
-  check_license_headers
-  check_workspace
-  check_boringssl
-  check_ldt_ffi
-  check_ukey2_ffi
-  build_fuzzers
-}
-
-# Checks everything included in the top level workspace
-check_workspace(){
-  set -e
-  cd $SCRIPT_DIR/..
-  # ensure formatting is correct (Check for it first because it is fast compared to running tests)
-  cargo fmt --check
-  # make sure everything compiles
-  cargo check --workspace --all-targets
-  # run all the tests
-  cargo test --workspace --quiet
-  # ensure the docs are valid (cross-references to other code, etc)
-  cargo doc --workspace --no-deps
-  cargo clippy --all-targets
-  cargo deny --workspace check
-  # Check the build for targets without using RustCrypto dependencies
-  cargo check --features=openssl --no-default-features
-}
-
-# Checks that the license auditing tool is installed and that all source files in the project contain the needed headers
-check_license_headers() {
-  set -e
-  cd $SCRIPT_DIR/..
-  # install location for those following the default instructions
-  ADDLICENSE="$HOME/go/bin/addlicense"
-  if [ ! -x "$ADDLICENSE" ]; then
-    # if not in the default place, assume it's in PATH
-    ADDLICENSE="addlicense"
-  fi
-
-  # see README for instructions on setting up addlicense tool
-  if ($ADDLICENSE -h >/dev/null 2>&1); then
-    echo "Add license is already installed"
-  else
-    echo "ERROR: addlicense tool is not installed, see instructions in README"
-    exit 1
-  fi
-
-  if $ADDLICENSE -check \
-      -ignore="**/android/build/**" \
-      -ignore="target/**" \
-      -ignore="**/target/**" \
-      -ignore="**/.idea/**" \
-      -ignore="**/cmake-build/**" \
-      -ignore="**/java/build/**" \
-      -ignore="**/java/*/build/**" \
-      -ignore="**/ukey2_c_ffi/cpp/build/**" \
-      .; then
-    echo "License header check succeeded!"
-  else
-    echo "ERROR: License header missing for above files"
-    exit 1
-  fi
-}
-
-# Build all fuzz targets
-build_fuzzers() {
-  set -e
-  cd $SCRIPT_DIR/..
-  # rust fuzzers
-  for fuzzed_crate in presence/xts_aes presence/ldt presence/ldt_np_adv connections/ukey2/ukey2_connections; do
-    (cd "$fuzzed_crate" && cargo +nightly fuzz build)
-  done
-
-  # ffi fuzzers
-  rm -Rf presence/ldt_np_adv_ffi_fuzz/cmake-build
-  (cd presence/ldt_np_adv_ffi_fuzz && mkdir -p cmake-build && cd cmake-build && cmake ../.. -DENABLE_FUZZ=true && make)
-  rm -Rf presence/ldt_np_adv_ffi_fuzz/cmake-build
-}
-
-# Builds and runs all tests for all combinations of features for the LDT FFI
-check_ldt_ffi() {
-  set -e
-  cd $SCRIPT_DIR/..
-  # We need to handle ldt_np_adv_ffi separately since it requires the nightly toolchain
-  cd presence/ldt_np_adv_ffi
-  cargo fmt --check
-  cargo check
-  # Default build, RustCrypto + no_std
-  cargo build --release
-  # Turn on std, still using RustCrypto
-  cargo build --features=std
-  # Turn off default features and try to build with std
-  cargo build --no-default-features --features=std
-  # Turn off RustCrypto and use openssl
-  cargo build --no-default-features --features=openssl
-  # Turn off RustCrypto and use boringssl
-  cargo --config .cargo/config-boringssl.toml build --no-default-features --features=boringssl
-  cargo doc --no-deps
-  cargo clippy --release
-  cargo clippy --features=std
-  cargo clippy --no-default-features --features=openssl
-  cargo clippy --no-default-features --features=std
-  cargo deny check
-  cd ../
-
-  # build C/C++ samples, tests, and benches
-  mkdir -p cmake-build && cd cmake-build
-  cmake .. -DENABLE_TESTS=true
-  make
-
-  # test with default build settings (rustcrypto, no_std)
-  echo "Testing default features (no_std + rustcrypto)"
-  (cd ../ldt_np_adv_ffi && cargo build --release)
-  (cd ldt_np_c_sample/tests && ctest)
-
-  # test with std
-  echo "Testing std feature flag"
-  (cd ../ldt_np_adv_ffi && cargo build --features std --release)
-  (cd ldt_np_c_sample/tests && make && ctest)
-
-  # test with boringssl crypto feature flag
-  echo "Testing boringssl"
-  (cd ../ldt_np_adv_ffi && cargo --config .cargo/config-boringssl.toml build --no-default-features --features boringssl --release)
-  (cd ldt_np_c_sample/tests && make && ctest)
-
-  # test with openssl feature flag
-  echo "Testing openssl"
-  (cd ../ldt_np_adv_ffi && cargo build --no-default-features --features openssl --release)
-  (cd ldt_np_c_sample/tests && make && ctest)
-
-  # test with std feature flag
-  echo "Testing std with no default features"
-  (cd ../ldt_np_adv_ffi && cargo build --no-default-features --features std --release)
-  (cd ldt_np_c_sample/tests && make && ctest)
-  cd ../
-}
-
-# Builds and runs tests for the UKEY2 FFI
-check_ukey2_ffi() {
-  set -e
-  cd $SCRIPT_DIR/..
-  cd connections/ukey2/ukey2_c_ffi
-  # Default build, RustCrypto
-  cargo build --release --lib
-  # Try to build with OpenSSL
-  cargo build --no-default-features --features=openssl
-  cargo doc --no-deps
-  cargo clippy --release
-  cargo clippy --no-default-features --features=openssl
-  cargo deny check
-
-  # build C/C++ samples, tests, and benches
-  cd cpp
-  mkdir -p build && cd build
-  cmake ..
-  make all
-  ctest
-
-  cd $SCRIPT_DIR/..
-}
-
-# Clones boringssl and uses bindgen to generate the rust crate, applies AOSP
-# specific patches to the 3p `openssl` crate so that it can use a bssl backend
-prepare_boringssl() {
-  set -e
-  cd $SCRIPT_DIR/../..
-  projectroot=$PWD
-  mkdir -p boringssl-build && cd boringssl-build
-
-  if ! git -C boringssl pull origin master; then
-    git clone https://boringssl.googlesource.com/boringssl
-  fi
-  # Snap to the AOSP commit of boringssl
-   boringssl_rev=$(curl https://android.googlesource.com/platform/external/boringssl/+/master/BORINGSSL_REVISION?format=text | base64 -d)
-  cd boringssl && git checkout $boringssl_rev && mkdir -p build && cd build
-  target=$(rustc -vV | awk '/host/ { print $2 }')
-  cmake -G Ninja .. -DRUST_BINDINGS="$target" && ninja
-  # The Rust crate is in `boringssl-build/boringssl/build/rust/bssl-sys`, which depends on a
-  # cmake-generated file as part of its source.
-
-  cd $projectroot/boringssl-build
-  rm -Rf rust-openssl
-  git clone https://github.com/sfackler/rust-openssl.git
-  git -C rust-openssl checkout 11797d9ecb73e94b7f55a49274318abc9dc074d2
-  git -C rust-openssl branch -f BASE_COMMIT
-  git -C rust-openssl am $projectroot/nearby/scripts/openssl-patches/*.patch
-
-  cd $projectroot/nearby
-
-  cat <<'EOF' >&2
-==========
-Preparation complete. The required repositories are downloaded to `beto-rust/boringssl-build`. If
-you need to go back to a clean state, you can remove that directory and rerun this script.
-
-You can now build and test with boringssl using the following command
-  `cargo --config .cargo/config-boringssl.toml test -p crypto_provider* --features=boringssl,std`
-==========
-EOF
-  echo
-}
-
-# Checks the build and tests for all boringssl related deps
-# crypto_provider_openssl is used on AOSP
-# crypto_provider_boringssl is used on Chromium
-# And we want to verify that both of these are tested in our own repo
-check_boringssl() {
-  set -e
-  cd $SCRIPT_DIR/../..
-  # clones boringssl and uses bindgen to generate the sys bindings
-  prepare_boringssl
-
-  # test the openssl crate with the boringssl feature
-  cargo --config .cargo/config-boringssl.toml test -p crypto_provider_openssl --features=boringssl
-
-  # test the crypto_provider built on the new bssl crate
-  cd crypto/crypto_provider_boringssl
-  cargo check
-  cargo fmt --check
-  cargo clippy --all-targets
-  cargo test
-  cargo doc --no-deps
-  cd ../../
-}
-
-# Helper for setting up dependencies on the build machine
-setup_kokoro_macos () {
-  set -e
-  go install github.com/google/addlicense@latest
-  curl https://sh.rustup.rs -sSf | sh -s -- -y --no-modify-path --default-toolchain 1.68.0
-  cargo install --locked cargo-deny --color never 2>&1
-  # Must use this version, as version >= 0.65.0 removes the option "--size_t-is-usize", an option
-  # used by boringssl when generating rust bindings
-  cargo install --version 0.64.0 bindgen-cli
-  source "$HOME/.cargo/env"
-  rustup install nightly
-  brew install google-benchmark ninja jsoncpp
-
-  # Unfortunately CMake is not smart enough to find this on its own, even though
-  # it is in fact there by default on the build machines
-  export OPENSSL_ROOT_DIR="/usr/local/opt/openssl@3"
-}
diff --git a/nearby/scripts/check-everything.sh b/nearby/scripts/check-everything.sh
deleted file mode 100755
index eda6d17..0000000
--- a/nearby/scripts/check-everything.sh
+++ /dev/null
@@ -1,21 +0,0 @@
-#!/bin/bash
-# Copyright 2022 Google LLC
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#      http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-
-set -ex
-cd "$(dirname "$0")"/..
-
-source ./scripts/build-script.sh
-
-check_everything
diff --git a/nearby/scripts/openssl-patches/0002-fix-boringssl-dsa-build-errors.patch b/nearby/scripts/openssl-patches/0002-fix-boringssl-dsa-build-errors.patch
new file mode 100644
index 0000000..030e46e
--- /dev/null
+++ b/nearby/scripts/openssl-patches/0002-fix-boringssl-dsa-build-errors.patch
@@ -0,0 +1,25 @@
+From 097eaa7166ad1f6298c41bc66e094a15a9a4e73e Mon Sep 17 00:00:00 2001
+From: Nabil Wadih <nwadih@google.com>
+Date: Tue, 6 Jun 2023 15:57:04 -0700
+Subject: [PATCH 2/2] fix boringssl dsa build errors
+
+---
+ openssl/src/dsa.rs | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/openssl/src/dsa.rs b/openssl/src/dsa.rs
+index c550f654..ffebdf8a 100644
+--- a/openssl/src/dsa.rs
++++ b/openssl/src/dsa.rs
+@@ -283,7 +283,7 @@ impl<T> fmt::Debug for Dsa<T> {
+ }
+ 
+ cfg_if! {
+-    if #[cfg(any(ossl110, libressl273))] {
++    if #[cfg(any(ossl110, libressl273, boringssl))] {
+         use ffi::{DSA_get0_key, DSA_get0_pqg, DSA_set0_key, DSA_set0_pqg};
+     } else {
+         #[allow(bad_style)]
+-- 
+2.41.0.162.gfafddb0af9-goog
+
diff --git a/nearby/scripts/openssl-patches/README.md b/nearby/scripts/openssl-patches/README.md
index 8483cad..ab1fcea 100644
--- a/nearby/scripts/openssl-patches/README.md
+++ b/nearby/scripts/openssl-patches/README.md
@@ -1,16 +1,16 @@
 This directory contains patch files for `rust-openssl` for it to build successfully with
 `--features=unstable_boringssl`.
 
-After running `prepare_boringssl`, the `rust-openssl` git repo is cloned to
+After running `prepare-rust-openssl`, the `rust-openssl` git repo is cloned to
 `beto-rust/boringssl-build/rust-openssl/openssl`, and the patches in this directory will be applied.
 
-If you make further changes, or update the "base commit" in `prepare_boringssl`, you can
+If you make further changes, or update the "base commit" in `prepare-rust-openssl`, you can
 regenerate the patch files by following these steps:
 
-1. Run `(source nearby/scripts/build-script.sh && prepare_boringssl)`
+1. Run `cargo run -- prepare-rust-openssl`
 2. `cd boringssl-build/rust-openssl/` and make the necessary changes
 3. Commit the changes
-4. `git format-patch BASE_COMMIT`. (Note: `BASE_COMMIT` is set by `prepare_boringssl`)
+4. `git format-patch BASE_COMMIT`. (Note: `BASE_COMMIT` is set by `prepare-rust-openssl`)
 5. The patch files will be generated in the current working directory. Move them here in
    `nearby/scripts/openssl-patches`.
 
diff --git a/nearby/src/crypto_ffi.rs b/nearby/src/crypto_ffi.rs
new file mode 100644
index 0000000..3118b8a
--- /dev/null
+++ b/nearby/src/crypto_ffi.rs
@@ -0,0 +1,175 @@
+// Copyright 2023 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+use crate::support::{run_cmd_shell, run_cmd_shell_with_color, YellowStderr};
+use crate::BuildBoringSslOptions;
+use anyhow::anyhow;
+use owo_colors::OwoColorize as _;
+use semver::{Version, VersionReq};
+use std::{
+    env, fs,
+    path::{Path, PathBuf},
+};
+
+pub fn build_boringssl(root: &Path, options: &BuildBoringSslOptions) -> anyhow::Result<()> {
+    let bindgen_version_req = VersionReq::parse(">=0.61.0")?;
+    let bindgen_version = get_bindgen_version()?;
+
+    if !bindgen_version_req.matches(&bindgen_version) {
+        return Err(anyhow!("Bindgen does not match expected version: {bindgen_version_req}"));
+    }
+
+    let mut vendor_dir =
+        root.parent().ok_or_else(|| anyhow!("project root dir no parent dir"))?.to_path_buf();
+    vendor_dir.push("boringssl-build");
+    fs::create_dir_all(&vendor_dir)?;
+
+    let mut build_dir = clone_repo_if_needed(
+        &vendor_dir,
+        "boringssl",
+        "https://boringssl.googlesource.com/boringssl",
+    )?;
+
+    run_cmd_shell_with_color::<YellowStderr>(
+        &build_dir,
+        format!("git checkout {}", &options.commit_hash),
+    )?;
+
+    build_dir.push("build");
+    fs::create_dir_all(&build_dir)?;
+
+    let target = run_cmd_shell_with_color::<YellowStderr>(&vendor_dir, "rustc -vV")?
+        .stdout()
+        .lines()
+        .find(|l| l.starts_with("host: "))
+        .and_then(|l| l.split_once(' '))
+        .ok_or_else(|| anyhow!("Couldn't get rustc target"))?
+        .1
+        .to_string();
+    let target = shell_escape::escape(target.into());
+    run_cmd_shell_with_color::<YellowStderr>(
+        &build_dir,
+        format!(
+            "cmake -G Ninja .. -DRUST_BINDINGS={} -DCMAKE_POSITION_INDEPENDENT_CODE=true",
+            target
+        ),
+    )?;
+    run_cmd_shell(&build_dir, "ninja")?;
+
+    Ok(())
+}
+
+pub fn check_boringssl(root: &Path, options: &BuildBoringSslOptions) -> anyhow::Result<()> {
+    log::info!("Checking boringssl");
+
+    build_boringssl(root, options)?;
+
+    let mut bssl_dir = root.to_path_buf();
+    bssl_dir.push("crypto/crypto_provider_boringssl");
+
+    run_cmd_shell(&bssl_dir, "cargo check")?;
+    run_cmd_shell(&bssl_dir, "cargo fmt --check")?;
+    run_cmd_shell(&bssl_dir, "cargo clippy --all-targets")?;
+    run_cmd_shell(&bssl_dir, "cargo test -- --color=always")?;
+    run_cmd_shell(&bssl_dir, "cargo doc --no-deps")?;
+    Ok(())
+}
+
+pub fn prepare_patched_rust_openssl(root: &Path) -> anyhow::Result<()> {
+    let mut vendor_dir =
+        root.parent().ok_or_else(|| anyhow!("project root dir no parent dir"))?.to_path_buf();
+    vendor_dir.push("boringssl-build");
+    fs::create_dir_all(&vendor_dir)?;
+
+    let repo_dir = clone_repo_if_needed(
+        &vendor_dir,
+        "rust-openssl",
+        "https://github.com/sfackler/rust-openssl.git",
+    )?;
+
+    run_cmd_shell_with_color::<YellowStderr>(
+        &repo_dir,
+        "git checkout 11797d9ecb73e94b7f55a49274318abc9dc074d2",
+    )?;
+    run_cmd_shell_with_color::<YellowStderr>(&repo_dir, "git branch -f BASE_COMMIT")?;
+    run_cmd_shell_with_color::<YellowStderr>(
+        &repo_dir,
+        format!(
+            "git am {}/scripts/openssl-patches/*.patch",
+            root.to_str().ok_or_else(|| anyhow!("root dir is not UTF-8"))?
+        ),
+    )?;
+
+    println!("{}", "Preparation complete. The required repositories are downloaded to `beto-rust/boringssl-build`. If
+you need to go back to a clean state, you can remove that directory and rerun this script.
+
+You can now build and test with boringssl using the following command
+  `cargo --config .cargo/config-boringssl.toml test -p crypto_provider* --features=boringssl,std`
+".cyan());
+
+    Ok(())
+}
+
+pub fn check_openssl(root: &Path) -> anyhow::Result<()> {
+    log::info!("Checking rust openssl");
+    prepare_patched_rust_openssl(root)?;
+
+    // test the openssl crate with the boringssl feature
+    run_cmd_shell(
+        root,
+        concat!(
+            "cargo --config .cargo/config-boringssl.toml test -p crypto_provider_openssl ",
+            "--features=boringssl -- --color=always"
+        ),
+    )?;
+
+    Ok(())
+}
+
+/// If the repo dir doesn't exist, or errors when running `git fetch -a`, re-clone it.
+///
+/// Returns the repo dir
+fn clone_repo_if_needed(
+    dir: &Path,
+    repo_subdir_name: &str,
+    repo_url: &str,
+) -> anyhow::Result<PathBuf> {
+    let mut repo_dir = dir.to_path_buf();
+    repo_dir.push(repo_subdir_name);
+
+    if run_cmd_shell_with_color::<YellowStderr>(&repo_dir, "git fetch -a").is_err() {
+        // delete it and start over
+        if repo_dir.exists() {
+            fs::remove_dir_all(&repo_dir)?;
+        }
+        run_cmd_shell_with_color::<YellowStderr>(dir, format!("git clone {}", repo_url))?;
+    }
+
+    Ok(repo_dir)
+}
+
+fn get_bindgen_version() -> anyhow::Result<Version> {
+    let bindgen_version_output = run_cmd_shell(&env::current_dir().unwrap(), "bindgen --version")?;
+
+    let version = bindgen_version_output
+        .stdout()
+        .lines()
+        .next()
+        .ok_or(anyhow!("bindgen version output stream is empty"))?
+        .strip_prefix("bindgen ")
+        .ok_or(anyhow!("bindgen version output missing expected prefix of \"bindgen \""))?
+        .parse::<Version>()?;
+
+    Ok(version)
+}
diff --git a/nearby/src/ffi.rs b/nearby/src/ffi.rs
new file mode 100644
index 0000000..e0efce5
--- /dev/null
+++ b/nearby/src/ffi.rs
@@ -0,0 +1,74 @@
+// Copyright 2023 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+use crate::{run_cmd_shell, run_cmd_shell_with_color, YellowStderr};
+use std::{fs, path};
+
+pub fn check_ldt_ffi(root: &path::Path) -> anyhow::Result<()> {
+    log::info!("Checking LDT ffi");
+    let mut ffi_dir = root.to_path_buf();
+    ffi_dir.push("presence/ldt_np_adv_ffi");
+
+    for cargo_cmd in [
+        "fmt --check",
+        // Default build, RustCrypto + no_std
+        "build --release",
+        // Turn on std, still using RustCrypto
+        "build --features=std",
+        // Turn off default features and try to build with std",
+        "build --no-default-features --features=std",
+        // Turn off RustCrypto and use openssl
+        "build --no-default-features --features=openssl",
+        // Turn off RustCrypto and use boringssl
+        "--config .cargo/config-boringssl.toml build --no-default-features --features=boringssl",
+        "doc --no-deps",
+        "clippy --release",
+        "clippy --features=std",
+        "clippy --no-default-features --features=openssl",
+        "clippy --no-default-features --features=std",
+        // TODO also clippy for boringssl?
+        "deny check",
+    ] {
+        run_cmd_shell(&ffi_dir, format!("cargo {}", cargo_cmd))?;
+    }
+
+    let mut build_dir = root.to_path_buf();
+    build_dir.push("presence/cmake-build");
+    fs::create_dir_all(&build_dir)?;
+
+    run_cmd_shell_with_color::<YellowStderr>(&build_dir, "cmake .. -DENABLE_TESTS=true")?;
+    run_cmd_shell_with_color::<YellowStderr>(&build_dir, "cmake --build .")?;
+
+    let mut tests_dir = build_dir;
+    tests_dir.push("ldt_np_c_sample/tests");
+
+    for build_config in [
+        // test with default build settings (rustcrypto, no_std)
+        "build --release",
+        // test with std and default features
+        "build --features std --release",
+        // test with boringssl crypto feature flag
+        "--config .cargo/config-boringssl.toml build --no-default-features --features boringssl --release",
+        // test with openssl feature flag
+        "build --no-default-features --features openssl --release",
+        // test without defaults and std feature flag
+        "build --no-default-features --features std --release",
+    ] {
+        run_cmd_shell(&ffi_dir, format!("cargo {}", build_config))?;
+        run_cmd_shell_with_color::<YellowStderr>(&tests_dir, "cmake --build .")?;
+        run_cmd_shell_with_color::<YellowStderr>(&tests_dir, "ctest")?;
+    }
+
+    Ok(())
+}
diff --git a/nearby/src/file_header/license.rs b/nearby/src/file_header/license.rs
new file mode 100644
index 0000000..b463ad0
--- /dev/null
+++ b/nearby/src/file_header/license.rs
@@ -0,0 +1,45 @@
+// Copyright 2023 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+//! Support for license-oriented usage of `file_header`.
+use super::*;
+use chrono::Datelike as _;
+
+/// The Apache 2 license for the current year and provided `copyright_holder`.
+pub fn apache_2(copyright_holder: &str) -> Header<impl HeaderChecker> {
+    Header::new(
+        asl2_checker(),
+        format!(
+            r#"Copyright {} {}
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License."#,
+            chrono::prelude::Utc::now().year(),
+            copyright_holder
+        ),
+    )
+}
+
+pub(crate) fn asl2_checker() -> impl HeaderChecker {
+    SingleLineChecker::new("Licensed under the Apache License, Version 2.0".to_string(), 10)
+}
diff --git a/nearby/src/file_header/mod.rs b/nearby/src/file_header/mod.rs
new file mode 100644
index 0000000..275a7d0
--- /dev/null
+++ b/nearby/src/file_header/mod.rs
@@ -0,0 +1,559 @@
+// Copyright 2023 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+//! Tools for checking for, or adding, headers (e.g. licenses, etc) in files.
+
+use std::{
+    fs,
+    io::{self, BufRead as _, Write as _},
+    iter::FromIterator,
+    path, thread,
+};
+
+pub mod license;
+
+/// A file header to check for or add to files.
+#[derive(Clone)]
+pub struct Header<C: HeaderChecker> {
+    checker: C,
+    header: String,
+}
+
+impl<C: HeaderChecker> Header<C> {
+    /// Construct a new `Header` with the `checker` used to determine if the header is already
+    /// present, and the plain `header` text to add (without any applicable comment syntax, etc).
+    pub fn new(checker: C, header: String) -> Self {
+        Self { checker, header }
+    }
+
+    /// Return true if the file has the desired header, false otherwise.
+    pub fn header_present(&self, input: &mut impl io::Read) -> io::Result<bool> {
+        self.checker.check(input)
+    }
+
+    /// Add the header, with appropriate formatting for the type of file indicated by `p`'s
+    /// extension, if the header is not already present.
+    /// Returns true if the header was added.
+    pub fn add_header_if_missing(&self, p: &path::Path) -> Result<bool, AddHeaderError> {
+        let err_mapper = |e| AddHeaderError::IoError(p.to_path_buf(), e);
+        let contents = fs::read_to_string(p).map_err(err_mapper)?;
+
+        if self.header_present(&mut contents.as_bytes()).map_err(err_mapper)? {
+            return Ok(false);
+        }
+
+        let mut effective_header = header_delimiters(p)
+            .ok_or_else(|| AddHeaderError::UnknownExtension(p.to_path_buf()))
+            .map(|d| wrap_header(&self.header, d))?;
+
+        let mut after_header = contents.as_str();
+        // check for a magic first line
+        if let Some((first_line, rest)) = contents.split_once('\n') {
+            if MAGIC_FIRST_LINES.iter().any(|l| first_line.contains(l)) {
+                let mut first_line = first_line.to_string();
+                first_line.push('\n');
+                effective_header.insert_str(0, &first_line);
+                after_header = rest;
+            }
+        }
+
+        // write the license
+        let mut f =
+            fs::OpenOptions::new().write(true).truncate(true).open(p).map_err(err_mapper)?;
+        f.write_all(effective_header.as_bytes()).map_err(err_mapper)?;
+        // newline to separate the header from previous contents
+        f.write_all("\n".as_bytes()).map_err(err_mapper)?;
+        f.write_all(after_header.as_bytes()).map_err(err_mapper)?;
+
+        Ok(true)
+    }
+}
+
+/// Errors that can occur when adding a header
+#[derive(Debug, thiserror::Error)]
+pub enum AddHeaderError {
+    #[error("I/O error at {0:?}: {1}")]
+    IoError(path::PathBuf, io::Error),
+    #[error("Unknown file extension: {0:?}")]
+    UnknownExtension(path::PathBuf),
+}
+
+/// Checks for headers in files, like licenses or author attribution.
+pub trait HeaderChecker: Send + Clone {
+    /// Return true if the file has the desired header, false otherwise.
+    fn check(&self, file: &mut impl io::Read) -> io::Result<bool>;
+}
+
+/// Checks for a in the first several lines of each file.
+#[derive(Clone)]
+pub struct SingleLineChecker {
+    /// Pattern to do a substring match on in each of the first `max_lines` lines of the file
+    pattern: String,
+    /// Number of lines to search through
+    max_lines: usize,
+}
+
+impl SingleLineChecker {
+    /// Construct a `SingleLineChecker` that looks for `pattern` in the first `max_lines` of a file.
+    pub(crate) fn new(pattern: String, max_lines: usize) -> Self {
+        Self { pattern, max_lines }
+    }
+}
+
+impl HeaderChecker for SingleLineChecker {
+    fn check(&self, input: &mut impl io::Read) -> io::Result<bool> {
+        let mut reader = io::BufReader::new(input);
+        let mut lines_read = 0;
+        // reuse buffer to minimize allocation
+        let mut line = String::new();
+        // only read the first bit of the file
+        while lines_read < self.max_lines {
+            line.clear();
+            let bytes = reader.read_line(&mut line)?;
+            if bytes == 0 {
+                // EOF
+                return Ok(false);
+            }
+            lines_read += 1;
+
+            if line.contains(&self.pattern) {
+                return Ok(true);
+            }
+        }
+
+        Ok(false)
+    }
+}
+
+#[derive(Copy, Clone)]
+enum CheckStatus {
+    MisMatchedHeader,
+    BinaryFile,
+}
+
+#[derive(Clone)]
+struct FileResult {
+    path: path::PathBuf,
+    status: CheckStatus,
+}
+
+#[derive(Clone, Default)]
+pub struct FileResults {
+    pub mismatched_files: Vec<path::PathBuf>,
+    pub binary_files: Vec<path::PathBuf>,
+}
+
+impl FileResults {
+    pub fn has_failure(&self) -> bool {
+        !self.mismatched_files.is_empty() || !self.binary_files.is_empty()
+    }
+}
+
+impl FromIterator<FileResult> for FileResults {
+    fn from_iter<I>(iter: I) -> FileResults
+    where
+        I: IntoIterator<Item = FileResult>,
+    {
+        let mut results = FileResults::default();
+        for result in iter {
+            match result.status {
+                CheckStatus::MisMatchedHeader => results.mismatched_files.push(result.path),
+                CheckStatus::BinaryFile => results.binary_files.push(result.path),
+            }
+        }
+        results
+    }
+}
+
+/// Recursively check for `header` in every file in `root` that matches `path_predicate`.
+///
+/// Returns a [`FileResults`] object containing the paths without headers detected.
+pub fn check_headers_recursively(
+    root: &path::Path,
+    path_predicate: impl Fn(&path::Path) -> bool,
+    header: Header<impl HeaderChecker + 'static>,
+    num_threads: usize,
+) -> Result<FileResults, CheckHeadersRecursivelyError> {
+    let (path_tx, path_rx) = crossbeam::channel::unbounded::<path::PathBuf>();
+    let (result_tx, result_rx) = crossbeam::channel::unbounded();
+
+    // spawn a few threads to handle files in parallel
+    let handles = (0..num_threads)
+        .map(|_| {
+            let path_rx = path_rx.clone();
+            let result_tx = result_tx.clone();
+            let header = header.clone();
+            thread::spawn(move || {
+                for p in path_rx {
+                    match fs::File::open(&p).and_then(|mut f| header.header_present(&mut f)) {
+                        Ok(header_present) => {
+                            if header_present {
+                                // no op
+                            } else {
+                                let res =
+                                    FileResult { path: p, status: CheckStatus::MisMatchedHeader };
+                                result_tx.send(Ok(res)).unwrap();
+                            }
+                        }
+                        Err(e) if e.kind() == io::ErrorKind::InvalidData => {
+                            // Binary file - add to ignore in license.rs
+                            let res = FileResult { path: p, status: CheckStatus::BinaryFile };
+                            result_tx.send(Ok(res)).unwrap();
+                        }
+                        Err(e) => result_tx
+                            .send(Err(CheckHeadersRecursivelyError::IoError(p, e)))
+                            .unwrap(),
+                    }
+                }
+
+                // no more files
+            })
+        })
+        .collect::<Vec<thread::JoinHandle<()>>>();
+    // make sure result channel closes when threads complete
+    drop(result_tx);
+
+    find_files(root, path_predicate, path_tx)?;
+
+    let res: FileResults = result_rx.into_iter().collect::<Result<_, _>>()?;
+
+    for h in handles {
+        h.join().unwrap();
+    }
+
+    Ok(res)
+}
+
+/// Errors that can occur when checking for headers recursively
+#[derive(Debug, thiserror::Error)]
+pub enum CheckHeadersRecursivelyError {
+    #[error("I/O error at {0:?}: {1}")]
+    IoError(path::PathBuf, io::Error),
+    #[error("Walkdir error: {0}")]
+    WalkdirError(#[from] walkdir::Error),
+}
+
+/// Add the provided `header` to any file in `root` that matches `path_predicate` and that doesn't
+/// already have a header as determined by `checker`.
+/// Returns a list of paths that had headers added.
+pub fn add_headers_recursively(
+    root: &path::Path,
+    path_predicate: impl Fn(&path::Path) -> bool,
+    header: Header<impl HeaderChecker>,
+) -> Result<Vec<path::PathBuf>, AddHeadersRecursivelyError> {
+    // likely no need for threading since adding headers is only done occasionally
+    let (path_tx, path_rx) = crossbeam::channel::unbounded::<path::PathBuf>();
+    find_files(root, path_predicate, path_tx)?;
+
+    path_rx
+        .into_iter()
+        // keep the errors, or the ones with added headers
+        .filter_map(|p| {
+            match header.add_header_if_missing(&p).map_err(|e| match e {
+                AddHeaderError::IoError(p, e) => AddHeadersRecursivelyError::IoError(p, e),
+                AddHeaderError::UnknownExtension(e) => {
+                    AddHeadersRecursivelyError::UnknownExtension(e)
+                }
+            }) {
+                Ok(added) => {
+                    if added {
+                        Some(Ok(p))
+                    } else {
+                        None
+                    }
+                }
+                Err(e) => Some(Err(e)),
+            }
+        })
+        .collect::<Result<Vec<_>, _>>()
+}
+
+/// Errors that can occur when adding a header recursively
+#[derive(Debug, thiserror::Error)]
+pub enum AddHeadersRecursivelyError {
+    #[error("I/O error at {0:?}: {1}")]
+    IoError(path::PathBuf, io::Error),
+    #[error("Walkdir error: {0}")]
+    WalkdirError(#[from] walkdir::Error),
+    #[error("Unknown file extension: {0:?}")]
+    UnknownExtension(path::PathBuf),
+}
+
+/// Find all files starting from `root` that do not match the globs in `ignore`, publishing the
+/// resulting paths into `dest`.
+fn find_files(
+    root: &path::Path,
+    path_predicate: impl Fn(&path::Path) -> bool,
+    dest: crossbeam::channel::Sender<path::PathBuf>,
+) -> Result<(), walkdir::Error> {
+    for r in walkdir::WalkDir::new(root).into_iter() {
+        let entry = r?;
+        if entry.path().is_dir() || !path_predicate(entry.path()) {
+            continue;
+        }
+        dest.send(entry.into_path()).unwrap()
+    }
+
+    Ok(())
+}
+
+/// Prepare a header for inclusion in a particular file syntax by wrapping it with
+/// comment characters as per the provided `delim`.
+fn wrap_header(orig_header: &str, delim: HeaderDelimiters) -> String {
+    let mut out = String::new();
+
+    if !delim.first_line.is_empty() {
+        out.push_str(delim.first_line);
+        out.push('\n');
+    }
+
+    // assumes header uses \n
+    for line in orig_header.split('\n') {
+        out.push_str(delim.content_line_prefix);
+        out.push_str(line);
+        // Remove any trailing whitespaces (excluding newlines) from `content_line_prefix + line`.
+        // For example, if `content_line_prefix` is `// ` and `line` is empty, the resulting string
+        // should be truncated to `//`.
+        out.truncate(out.trim_end_matches([' ', '\t']).len());
+        out.push('\n');
+    }
+
+    if !delim.last_line.is_empty() {
+        out.push_str(delim.last_line);
+        out.push('\n');
+    }
+
+    out
+}
+
+/// Returns the header prefix line, content line prefix, and suffix line for the extension of the
+/// provided path, or `None` if the extension is not recognized.
+fn header_delimiters(p: &path::Path) -> Option<HeaderDelimiters> {
+    match p
+        .extension()
+        // if the extension isn't UTF-8, oh well
+        .and_then(|os_str| os_str.to_str())
+        .unwrap_or("")
+    {
+        "c" | "h" | "gv" | "java" | "scala" | "kt" | "kts" => Some(("/*", " * ", " */")),
+        "js" | "mjs" | "cjs" | "jsx" | "tsx" | "css" | "scss" | "sass" | "ts" => {
+            Some(("/**", " * ", " */"))
+        }
+        "cc" | "cpp" | "cs" | "go" | "hcl" | "hh" | "hpp" | "m" | "mm" | "proto" | "rs"
+        | "swift" | "dart" | "groovy" | "v" | "sv" => Some(("", "// ", "")),
+        "py" | "sh" | "yaml" | "yml" | "dockerfile" | "rb" | "gemfile" | "tcl" | "tf" | "bzl"
+        | "pl" | "pp" | "build" => Some(("", "# ", "")),
+        "el" | "lisp" => Some(("", ";; ", "")),
+        "erl" => Some(("", "% ", "")),
+        "hs" | "lua" | "sql" | "sdl" => Some(("", "-- ", "")),
+        "html" | "xml" | "vue" | "wxi" | "wxl" | "wxs" => Some(("<!--", " ", "-->")),
+        "php" => Some(("", "// ", "")),
+        "ml" | "mli" | "mll" | "mly" => Some(("(**", "   ", "*)")),
+        // also handle whole filenames if extensions didn't match
+        _ => match p.file_name().and_then(|os_str| os_str.to_str()).unwrap_or("") {
+            "Dockerfile" => Some(("", "# ", "")),
+            _ => None,
+        },
+    }
+    .map(|(first_line, content_line_prefix, last_line)| HeaderDelimiters {
+        first_line,
+        content_line_prefix,
+        last_line,
+    })
+}
+
+/// Delimiters to use around and inside a header for a particular file syntax.
+#[derive(Clone, Copy)]
+struct HeaderDelimiters {
+    /// Line to prepend before the header
+    first_line: &'static str,
+    /// Prefix before each line of the header itself
+    content_line_prefix: &'static str,
+    /// Line to append after the header
+    last_line: &'static str,
+}
+
+const MAGIC_FIRST_LINES: [&str; 8] = [
+    "#!",                       // shell script
+    "<?xml",                    // XML declaratioon
+    "<!doctype",                // HTML doctype
+    "# encoding:",              // Ruby encoding
+    "# frozen_string_literal:", // Ruby interpreter instruction
+    "<?php",                    // PHP opening tag
+    "# escape", // Dockerfile directive https://docs.docker.com/engine/reference/builder/#parser-directives
+    "# syntax", // Dockerfile directive https://docs.docker.com/engine/reference/builder/#parser-directives
+];
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn single_line_checker_finds_header_when_present() {
+        let input = r#"foo
+        some license
+        bar"#;
+
+        assert!(test_header().checker.check(&mut input.as_bytes()).unwrap());
+    }
+
+    #[test]
+    fn single_line_checker_doesnt_find_header_when_missing() {
+        let input = r#"foo
+        wrong license
+        bar"#;
+
+        assert!(!test_header().checker.check(&mut input.as_bytes()).unwrap());
+    }
+
+    #[test]
+    fn single_line_checker_throws_error_when_missing_and_file_is_non_utf8() {
+        let input = b"foo
+        \x00\xff
+        bar";
+
+        assert_eq!(
+            io::ErrorKind::InvalidData,
+            test_header().checker.check(&mut input.as_slice()).unwrap_err().kind()
+        );
+    }
+
+    #[test]
+    fn single_line_checker_doesnt_panic_when_file_is_non_utf8() {
+        let inputs: [&'static [u8]; 3] = [
+            b"foo
+            \x00\xff
+            bar",
+            b"foo
+            some license
+            \x00\xff
+            bar",
+            b"foo
+            \x00\xff
+            some license
+            bar",
+        ];
+
+        for mut input in inputs {
+            // Output is not defined for non-utf-8 files, but we should handle them with grace
+            let _ = test_header().checker.check(&mut input);
+        }
+    }
+
+    #[test]
+    fn adds_header_with_empty_delimiters() {
+        let file = tempfile::Builder::new().suffix(".rs").tempfile().unwrap();
+        fs::write(file.path(), r#"not a license"#).unwrap();
+
+        test_header().add_header_if_missing(file.path()).unwrap();
+
+        assert_eq!(
+            "// some license etc etc etc
+
+not a license",
+            fs::read_to_string(file.path()).unwrap()
+        );
+    }
+
+    #[test]
+    fn adds_header_with_nonempty_delimiters() {
+        let file = tempfile::Builder::new().suffix(".c").tempfile().unwrap();
+        fs::write(file.path(), r#"not a license"#).unwrap();
+
+        test_header().add_header_if_missing(file.path()).unwrap();
+
+        assert_eq!(
+            "/*
+ * some license etc etc etc
+ */
+
+not a license",
+            fs::read_to_string(file.path()).unwrap()
+        );
+    }
+
+    #[test]
+    fn adds_header_trim_trailing_whitespace() {
+        let file = tempfile::Builder::new().suffix(".c").tempfile().unwrap();
+        fs::write(file.path(), r#"not a license"#).unwrap();
+
+        test_header_with_blank_lines_and_trailing_whitespace()
+            .add_header_if_missing(file.path())
+            .unwrap();
+
+        assert_eq!(
+            "/*
+ * some license
+ * line with trailing whitespace.
+ *
+ * etc
+ */
+
+not a license",
+            fs::read_to_string(file.path()).unwrap()
+        );
+    }
+
+    #[test]
+    fn doesnt_add_header_when_already_present() {
+        let file = tempfile::Builder::new().suffix(".rs").tempfile().unwrap();
+        let initial_content = r#"
+        // some license etc etc etc already present
+        not a license"#;
+        fs::write(file.path(), initial_content).unwrap();
+
+        test_header().add_header_if_missing(file.path()).unwrap();
+
+        assert_eq!(initial_content, fs::read_to_string(file.path()).unwrap());
+    }
+
+    #[test]
+    fn adds_header_after_magic_first_line() {
+        let file = tempfile::Builder::new().suffix(".xml").tempfile().unwrap();
+        fs::write(
+            file.path(),
+            r#"<?xml version="1.0" encoding="UTF-8"?>
+<root />
+"#,
+        )
+        .unwrap();
+
+        test_header().add_header_if_missing(file.path()).unwrap();
+
+        assert_eq!(
+            r#"<?xml version="1.0" encoding="UTF-8"?>
+<!--
+ some license etc etc etc
+-->
+
+<root />
+"#,
+            fs::read_to_string(file.path()).unwrap()
+        );
+    }
+
+    fn test_header() -> Header<SingleLineChecker> {
+        Header::new(
+            SingleLineChecker::new("some license".to_string(), 100),
+            r#"some license etc etc etc"#.to_string(),
+        )
+    }
+
+    fn test_header_with_blank_lines_and_trailing_whitespace() -> Header<SingleLineChecker> {
+        Header::new(
+            SingleLineChecker::new("some license".to_string(), 100),
+            "some license\nline with trailing whitespace.  \n\netc".to_string(),
+        )
+    }
+}
diff --git a/nearby/src/fuzzers.rs b/nearby/src/fuzzers.rs
new file mode 100644
index 0000000..6c84582
--- /dev/null
+++ b/nearby/src/fuzzers.rs
@@ -0,0 +1,78 @@
+// Copyright 2023 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+use crate::{run_cmd_shell_with_color, YellowStderr};
+use std::{fs, path};
+
+pub(crate) fn run_rust_fuzzers(root: &path::Path) -> anyhow::Result<()> {
+    log::info!("Running rust fuzzers");
+    run_cmd_shell_with_color::<YellowStderr>(
+        &root.join("presence/xts_aes"),
+        "cargo +nightly fuzz run xts-roundtrip -- -runs=10000 -max_total_time=60",
+    )?;
+    run_cmd_shell_with_color::<YellowStderr>(
+        &root.join("presence/ldt"),
+        "cargo +nightly fuzz run ldt-roundtrip -- -runs=10000 -max_total_time=60",
+    )?;
+    run_cmd_shell_with_color::<YellowStderr>(
+        &root.join("presence/ldt_np_adv"),
+        "cargo +nightly fuzz run ldt-np-decrypt -- -runs=10000 -max_total_time=60",
+    )?;
+    run_cmd_shell_with_color::<YellowStderr>(
+        &root.join("presence/ldt_np_adv"),
+        "cargo +nightly fuzz run ldt-np-roundtrip -- -runs=10000 -max_total_time=60",
+    )?;
+    run_cmd_shell_with_color::<YellowStderr>(
+        &root.join("connections/ukey2/ukey2_connections"),
+        "cargo +nightly fuzz run fuzz_connection -- -runs=10000 -max_total_time=60",
+    )?;
+    run_cmd_shell_with_color::<YellowStderr>(
+        &root.join("connections/ukey2/ukey2_connections"),
+        "cargo +nightly fuzz run fuzz_from_saved_session -- -runs=10000 -max_total_time=60",
+    )?;
+    run_cmd_shell_with_color::<YellowStderr>(
+        &root.join("connections/ukey2/ukey2_connections"),
+        "cargo +nightly fuzz run fuzz_handshake -- -runs=10000 -max_total_time=60",
+    )?;
+    run_cmd_shell_with_color::<YellowStderr>(
+        &root.join("crypto/crypto_provider_test"),
+        "cargo +nightly fuzz run fuzz_p256 -- -runs=10000 -max_total_time=60",
+    )?;
+    run_cmd_shell_with_color::<YellowStderr>(
+        &root.join("crypto/crypto_provider_test"),
+        concat!(
+            "cargo +nightly fuzz run fuzz_p256 --features=openssl --no-default-features ",
+            "-- -runs=10000 -max_total_time=60"
+        ),
+    )?;
+
+    Ok(())
+}
+
+pub(crate) fn build_ffi_fuzzers(root: &path::Path) -> anyhow::Result<()> {
+    log::info!("Building ffi fuzzers");
+    // TODO currently broken because the FFI stuff hasn't necessarily been built yet
+    let mut build_dir = root.to_path_buf();
+    build_dir.push("presence/ldt_np_adv_ffi_fuzz/cmake-build");
+
+    if build_dir.exists() {
+        fs::remove_dir_all(&build_dir)?;
+    }
+    fs::create_dir_all(&build_dir)?;
+    run_cmd_shell_with_color::<YellowStderr>(&build_dir, "cmake ../.. -DENABLE_FUZZ=true")?;
+    run_cmd_shell_with_color::<YellowStderr>(&build_dir, "make")?;
+    fs::remove_dir_all(&build_dir)?;
+
+    Ok(())
+}
diff --git a/nearby/src/jni.rs b/nearby/src/jni.rs
new file mode 100644
index 0000000..903ac6d
--- /dev/null
+++ b/nearby/src/jni.rs
@@ -0,0 +1,25 @@
+// Copyright 2023 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+use crate::support::run_cmd_shell;
+use std::path;
+
+// This has to happen after both boringssl has been built and prepare rust openssl patches has been run.
+pub fn check_ldt_jni(root: &path::Path) -> anyhow::Result<()> {
+    for feature in ["opensslbssl", "boringssl"] {
+        run_cmd_shell(root, format!("cargo --config .cargo/config-boringssl.toml build -p ldt_np_jni --no-default-features --features={}", feature))?;
+    }
+
+    Ok(())
+}
diff --git a/nearby/src/license.rs b/nearby/src/license.rs
new file mode 100644
index 0000000..fd9af83
--- /dev/null
+++ b/nearby/src/license.rs
@@ -0,0 +1,98 @@
+// Copyright 2023 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+use crate::file_header::{self, check_headers_recursively};
+use std::path;
+
+pub(crate) fn check_license_headers(root: &path::Path) -> anyhow::Result<()> {
+    log::info!("Checking license headers");
+    let ignore = license_ignore()?;
+    let results = check_headers_recursively(
+        root,
+        |p| !ignore.is_match(p),
+        file_header::license::apache_2("Google LLC"),
+        4,
+    )?;
+
+    for path in results.mismatched_files.iter() {
+        eprintln!("Header not present: {path:?}");
+    }
+
+    for path in results.binary_files.iter() {
+        eprintln!("Binary file: {path:?}");
+    }
+    if !results.binary_files.is_empty() {
+        eprintln!("Consider adding binary files to the ignore list in src/licence.rs.");
+    }
+
+    if results.has_failure() {
+        Err(anyhow::anyhow!("License header check failed"))
+    } else {
+        Ok(())
+    }
+}
+
+pub(crate) fn add_license_headers(root: &path::Path) -> anyhow::Result<()> {
+    let ignore = license_ignore()?;
+    for p in file_header::add_headers_recursively(
+        root,
+        |p| !ignore.is_match(p),
+        file_header::license::apache_2("Google LLC"),
+    )? {
+        println!("Added header: {:?}", p);
+    }
+
+    Ok(())
+}
+
+fn license_ignore() -> Result<globset::GlobSet, globset::Error> {
+    let mut builder = globset::GlobSetBuilder::new();
+    for lic in license_ignore_dirs() {
+        builder.add(globset::Glob::new(lic)?);
+    }
+    builder.build()
+}
+
+fn license_ignore_dirs() -> Vec<&'static str> {
+    vec![
+        "**/android/build/**",
+        "target/**",
+        "**/target/**",
+        "**/.idea/**",
+        "**/cmake-build/**",
+        "**/java/build/**",
+        "**/java/*/build/**",
+        "**/ukey2_c_ffi/cpp/build/**",
+        "**/*.toml",
+        "**/*.md",
+        "**/*.lock",
+        "**/*.json",
+        "**/*.rsp",
+        "**/*.patch",
+        "**/*.dockerignore",
+        "**/*.apk",
+        "**/gradle/*",
+        "**/.gradle/*",
+        "**/.git*",
+        "**/*test*vectors.txt",
+        "**/auth_token.txt",
+        "**/*.mdb",
+        "**/.DS_Store",
+        "**/fuzz/corpus/**",
+        "**/.*.swp",
+        "**/Session.vim",
+        "**/*.properties",
+        "**/third_party/**",
+    ]
+}
diff --git a/nearby/src/main.rs b/nearby/src/main.rs
new file mode 100644
index 0000000..b7d002b
--- /dev/null
+++ b/nearby/src/main.rs
@@ -0,0 +1,164 @@
+// Copyright 2023 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+extern crate core;
+
+use clap::Parser as _;
+use env_logger::Env;
+use std::{env, path};
+use support::*;
+
+mod crypto_ffi;
+mod ffi;
+mod file_header;
+mod fuzzers;
+mod jni;
+mod license;
+mod support;
+mod ukey2;
+
+fn main() -> anyhow::Result<()> {
+    env_logger::Builder::from_env(Env::default().default_filter_or("info")).init();
+    let cli: Cli = Cli::parse();
+
+    let root_dir = path::PathBuf::from(
+        env::var("CARGO_MANIFEST_DIR").expect("Must be run via Cargo to establish root directory"),
+    );
+
+    match cli.subcommand {
+        Subcommand::BuildBoringssl(ref bssl_options) => {
+            crypto_ffi::build_boringssl(&root_dir, bssl_options)?
+        }
+        Subcommand::CheckBoringssl(ref bssl_options) => {
+            crypto_ffi::check_boringssl(&root_dir, bssl_options)?
+        }
+        Subcommand::PrepareRustOpenssl => crypto_ffi::prepare_patched_rust_openssl(&root_dir)?,
+        Subcommand::CheckOpenssl => crypto_ffi::check_openssl(&root_dir)?,
+        Subcommand::RunRustFuzzers => fuzzers::run_rust_fuzzers(&root_dir)?,
+        Subcommand::BuildFfiFuzzers => fuzzers::build_ffi_fuzzers(&root_dir)?,
+        Subcommand::CheckLicenseHeaders => license::check_license_headers(&root_dir)?,
+        Subcommand::AddLicenseHeaders => license::add_license_headers(&root_dir)?,
+        Subcommand::CheckWorkspace(ref options) => check_workspace(&root_dir, options)?,
+        Subcommand::CheckLdtFfi => ffi::check_ldt_ffi(&root_dir)?,
+        Subcommand::CheckEverything { ref check_options, ref bssl_options } => {
+            check_everything(&root_dir, check_options, bssl_options)?
+        }
+        Subcommand::CheckUkey2Ffi => ukey2::check_ukey2_ffi(&root_dir)?,
+        Subcommand::CheckLdtJni => jni::check_ldt_jni(&root_dir)?,
+    }
+
+    Ok(())
+}
+
+pub fn check_workspace(root: &path::Path, options: &CheckOptions) -> anyhow::Result<()> {
+    log::info!("Running cargo checks on workspace");
+
+    let fmt_command = if options.reformat { "cargo fmt" } else { "cargo fmt --check" };
+
+    for cargo_cmd in [
+        // ensure formatting is correct (Check for it first because it is fast compared to running tests)
+        fmt_command,
+        // make sure everything compiles
+        "cargo check --workspace --all-targets",
+        // run all the tests
+        //TODO: re-enable the openssl tests, this was potentially failing due to UB code in the
+        // upstream rust-openssl crate's handling of empty slices. This repros consistently when
+        // using the rust-openssl crate backed by openssl-sys on Ubuntu 20.04.
+        "cargo test --workspace --quiet --exclude crypto_provider_openssl -- --color=always",
+        // ensure the docs are valid (cross-references to other code, etc)
+        "RUSTDOCFLAGS='--deny warnings' cargo doc --workspace --no-deps",
+        "cargo clippy --all-targets --workspace -- --deny warnings",
+        "cargo deny --workspace check",
+    ] {
+        run_cmd_shell(root, cargo_cmd)?;
+    }
+
+    Ok(())
+}
+pub fn check_everything(
+    root: &path::Path,
+    check_options: &CheckOptions,
+    bssl_options: &BuildBoringSslOptions,
+) -> anyhow::Result<()> {
+    license::check_license_headers(root)?;
+    check_workspace(root, check_options)?;
+    crypto_ffi::check_boringssl(root, bssl_options)?;
+    crypto_ffi::check_openssl(root)?;
+    ffi::check_ldt_ffi(root)?;
+    jni::check_ldt_jni(root)?;
+    ukey2::check_ukey2_ffi(root)?;
+    fuzzers::run_rust_fuzzers(root)?;
+    fuzzers::build_ffi_fuzzers(root)?;
+
+    Ok(())
+}
+
+#[derive(clap::Parser)]
+struct Cli {
+    #[clap(subcommand)]
+    subcommand: Subcommand,
+}
+
+#[derive(clap::Subcommand, Debug, Clone)]
+enum Subcommand {
+    /// Clones boringssl and uses bindgen to generate the rust crate
+    BuildBoringssl(BuildBoringSslOptions),
+    /// Run crypto provider tests using boringssl backend
+    CheckBoringssl(BuildBoringSslOptions),
+    /// Applies AOSP specific patches to the 3p `openssl` crate so that it can use a boringssl
+    /// backend
+    PrepareRustOpenssl,
+    /// Run crypto provider tests using openssl crate with boringssl backend
+    CheckOpenssl,
+    /// Build and run pure Rust fuzzers for 10000 runs
+    RunRustFuzzers,
+    /// Build FFI fuzzers
+    BuildFfiFuzzers,
+    /// Builds and runs all tests for all combinations of features for the LDT FFI
+    CheckLdtFfi,
+    /// Checks the workspace 3rd party crates and makes sure they have a valid license
+    CheckLicenseHeaders,
+    /// Generate new headers for any files that are missing them
+    AddLicenseHeaders,
+    /// Checks everything included in the top level workspace
+    CheckWorkspace(CheckOptions),
+    /// Checks everything in beto-rust
+    CheckEverything {
+        #[command(flatten)]
+        check_options: CheckOptions,
+        #[command(flatten)]
+        bssl_options: BuildBoringSslOptions,
+    },
+    /// Builds and runs tests for the UKEY2 FFI
+    CheckUkey2Ffi,
+    /// Checks the build of ldt_jni wrapper with non default features, ie rust-openssl, and boringssl
+    CheckLdtJni,
+}
+
+#[derive(clap::Args, Debug, Clone, Default)]
+pub struct CheckOptions {
+    #[arg(long, help = "reformat files with cargo fmt")]
+    reformat: bool,
+}
+
+#[derive(clap::Args, Debug, Clone, Default)]
+pub struct BuildBoringSslOptions {
+    #[arg(
+        long,
+        // the commit after this one causes failures in rust-openssl
+        default_value = "d995d82ad53133017e34b009e9c6912b2ef6aeb7",
+        help = "Commit hash to use when checking out boringssl"
+    )]
+    commit_hash: String,
+}
diff --git a/nearby/src/support.rs b/nearby/src/support.rs
new file mode 100644
index 0000000..cc81352
--- /dev/null
+++ b/nearby/src/support.rs
@@ -0,0 +1,195 @@
+// Copyright 2023 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+use anyhow::{anyhow, Context as _};
+use owo_colors::OwoColorize as _;
+use std::{collections, env, ffi, io, io::BufRead, path, process, thread};
+
+pub fn run_cmd_shell(
+    dir: &path::Path,
+    cmd: impl AsRef<ffi::OsStr>,
+) -> anyhow::Result<SuccessOutput> {
+    run_cmd_shell_with_color::<DefaultColors>(dir, cmd)
+}
+
+/// Run a shell command using shell arg parsing.
+///
+/// Removes all `*CARGO*` and `*RUSTUP*` env vars in case this was run with
+/// `cargo run`. If they are left in, they confuse nested `cargo` invocations.
+///
+/// Return Ok if the process completed normally.
+pub fn run_cmd_shell_with_color<C: TermColors>(
+    dir: &path::Path,
+    cmd: impl AsRef<ffi::OsStr>,
+) -> anyhow::Result<SuccessOutput> {
+    run::<C>(dir, process::Command::new("sh").current_dir(dir).args(["-c".as_ref(), cmd.as_ref()]))
+}
+
+/// Run a cmd with explicit args directly without a shell.
+///
+/// Removes all `*CARGO*` and `*RUSTUP*` env vars in case this was run with
+/// `cargo run`.
+///
+/// Return Ok if the process completed normally.
+#[allow(dead_code)]
+pub fn run_cmd<C: TermColors, P, A, S>(
+    dir: &path::Path,
+    cmd: &P,
+    args: A,
+) -> anyhow::Result<SuccessOutput>
+where
+    P: AsRef<path::Path> + ?Sized,
+    A: Clone + IntoIterator<Item = S>,
+    S: AsRef<ffi::OsStr>,
+{
+    run::<C>(dir, process::Command::new(cmd.as_ref()).current_dir(dir).args(args))
+}
+
+/// Run the specified command.
+///
+/// `cmd_with_args` is used
+fn run<C: TermColors>(
+    dir: &path::Path,
+    command: &mut process::Command,
+) -> Result<SuccessOutput, anyhow::Error> {
+    // approximately human readable version of the invocation for logging
+    let cmd_with_args = command.get_args().fold(
+        command.get_program().to_os_string(),
+        |mut acc: ffi::OsString, s| {
+            acc.push(" ");
+            acc.push(shell_escape::escape(s.to_string_lossy()).as_ref());
+            acc
+        },
+    );
+
+    let context = format!("{} [{}]", cmd_with_args.to_string_lossy(), dir.to_string_lossy(),);
+    println!("[{}] [{}]", cmd_with_args.to_string_lossy().green(), dir.to_string_lossy().blue());
+
+    let mut child = command
+        .env_clear()
+        .envs(modified_cmd_env())
+        .stdin(process::Stdio::null())
+        .stdout(process::Stdio::piped())
+        .stderr(process::Stdio::piped())
+        .spawn()
+        .context(context.clone())?;
+
+    // If thread creation overhead becomes a problem, we could always use a shared context
+    // that holds on to some channels.
+    let stdout_thread = spawn_print_thread::<C::StdoutColor, _, _>(
+        child.stdout.take().expect("stdout must be present"),
+        io::stdout(),
+    );
+    let stderr_thread = spawn_print_thread::<C::StderrColor, _, _>(
+        child.stderr.take().expect("stderr must be present"),
+        io::stderr(),
+    );
+
+    let status = child.wait()?;
+
+    let stdout = stdout_thread.join().expect("stdout thread panicked");
+    stderr_thread.join().expect("stderr thread panicked");
+
+    match status.code() {
+        None => {
+            eprintln!("Process terminated by signal");
+            Err(anyhow!("Process terminated by signal"))
+        }
+        Some(0) => Ok(SuccessOutput { stdout }),
+        Some(n) => {
+            eprintln!("Exit code: {n}");
+            Err(anyhow!("Exit code: {n}"))
+        }
+    }
+    .context(context)
+}
+
+pub struct SuccessOutput {
+    stdout: String,
+}
+
+impl SuccessOutput {
+    pub fn stdout(&self) -> &str {
+        &self.stdout
+    }
+}
+
+/// Returns modified env vars that are suitable for use in child invocations.
+fn modified_cmd_env() -> collections::HashMap<String, String> {
+    env::vars()
+        // Filter out `*CARGO*` or `*RUSTUP*` vars as those will confuse child invocations of `cargo`.
+        .filter(|(k, _)| !(k.contains("CARGO") || k.contains("RUSTUP")))
+        // We want colors in our cargo invocations
+        .chain([(String::from("CARGO_TERM_COLOR"), String::from("always"))])
+        .collect()
+}
+
+/// Trait for specifying the terminal text colors of the command output.
+pub trait TermColors {
+    /// Color for stdout. Use `owo_colors::colors::Default` to keep color codes from the command.
+    type StdoutColor: owo_colors::Color;
+    /// Color for stderr. Use `owo_colors::colors::Default` to keep color codes from the command.
+    type StderrColor: owo_colors::Color;
+}
+
+/// Override only the stderr color to yellow.
+#[non_exhaustive]
+pub struct YellowStderr;
+
+impl TermColors for YellowStderr {
+    type StdoutColor = owo_colors::colors::Default;
+    type StderrColor = owo_colors::colors::Yellow;
+}
+
+/// Keep the default colors from the command output. Typically used with `--color=always` or
+/// equivalent env vars like `CARGO_TERM_COLOR` to keep the colors even though the output is not a
+/// tty.
+#[non_exhaustive]
+pub struct DefaultColors;
+impl TermColors for DefaultColors {
+    type StdoutColor = owo_colors::colors::Default;
+    type StderrColor = owo_colors::colors::Default;
+}
+
+/// Spawn a thread that will print any lines read from the input using the specified color on
+/// the provided writer (intended to be `stdin`/`stdout`.
+///
+/// The thread accumulates all output lines and returns it
+fn spawn_print_thread<C, R, W>(input: R, mut output: W) -> thread::JoinHandle<String>
+where
+    C: owo_colors::Color,
+    R: io::Read + Send + 'static,
+    W: io::Write + Send + 'static,
+{
+    thread::spawn(move || {
+        let mut line = String::new();
+        let mut all_output = String::new();
+        let mut buf_read = io::BufReader::new(input);
+
+        loop {
+            line.clear();
+            match buf_read.read_line(&mut line) {
+                Ok(0) => break,
+                Ok(_) => {
+                    all_output.push_str(&line);
+                    write!(output, "{}", line.fg::<C>()).expect("write to stdio failed");
+                }
+                // TODO do something smarter for non-UTF8 output
+                Err(e) => eprintln!("{}: {:?}", "Could not read line".red(), e),
+            }
+        }
+
+        all_output
+    })
+}
diff --git a/nearby/src/ukey2.rs b/nearby/src/ukey2.rs
new file mode 100644
index 0000000..c54fbb3
--- /dev/null
+++ b/nearby/src/ukey2.rs
@@ -0,0 +1,41 @@
+// Copyright 2023 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+use crate::{run_cmd_shell, run_cmd_shell_with_color, YellowStderr};
+use std::{fs, path};
+
+pub(crate) fn check_ukey2_ffi(root: &path::Path) -> anyhow::Result<()> {
+    log::info!("Checking Ukey2 ffi");
+    let mut ffi_dir = root.to_path_buf();
+    ffi_dir.push("connections/ukey2/ukey2_c_ffi");
+
+    // Default build, RustCrypto
+    run_cmd_shell(&ffi_dir, "cargo build --release --lib")?;
+    // OpenSSL
+    run_cmd_shell(&ffi_dir, "cargo build --no-default-features --features=openssl")?;
+
+    run_cmd_shell(&ffi_dir, "cargo doc --no-deps")?;
+    run_cmd_shell(&ffi_dir, "cargo clippy --no-default-features --features=openssl")?;
+
+    run_cmd_shell(&ffi_dir, "cargo deny check")?;
+
+    let mut ffi_build_dir = ffi_dir.to_path_buf();
+    ffi_build_dir.push("cpp/build");
+    fs::create_dir_all(&ffi_build_dir)?;
+    run_cmd_shell_with_color::<YellowStderr>(&ffi_build_dir, "cmake ..")?;
+    run_cmd_shell_with_color::<YellowStderr>(&ffi_build_dir, "make all")?;
+    run_cmd_shell_with_color::<YellowStderr>(&ffi_build_dir, "ctest")?;
+
+    Ok(())
+}
diff --git a/third_party/jsoncpp/json/json-forwards.h b/third_party/jsoncpp/json/json-forwards.h
new file mode 100644
index 0000000..89d2947
--- /dev/null
+++ b/third_party/jsoncpp/json/json-forwards.h
@@ -0,0 +1,447 @@
+/// Json-cpp amalgamated forward header (http://jsoncpp.sourceforge.net/).
+/// It is intended to be used with #include "json/json-forwards.h"
+/// This header provides forward declaration for all JsonCpp types.
+
+// //////////////////////////////////////////////////////////////////////
+// Beginning of content of file: LICENSE
+// //////////////////////////////////////////////////////////////////////
+
+/*
+The JsonCpp library's source code, including accompanying documentation,
+tests and demonstration applications, are licensed under the following
+conditions...
+
+Baptiste Lepilleur and The JsonCpp Authors explicitly disclaim copyright in all
+jurisdictions which recognize such a disclaimer. In such jurisdictions,
+this software is released into the Public Domain.
+
+In jurisdictions which do not recognize Public Domain property (e.g. Germany as of
+2010), this software is Copyright (c) 2007-2010 by Baptiste Lepilleur and
+The JsonCpp Authors, and is released under the terms of the MIT License (see below).
+
+In jurisdictions which recognize Public Domain property, the user of this
+software may choose to accept it either as 1) Public Domain, 2) under the
+conditions of the MIT License (see below), or 3) under the terms of dual
+Public Domain/MIT License conditions described here, as they choose.
+
+The MIT License is about as close to Public Domain as a license can get, and is
+described in clear, concise terms at:
+
+   http://en.wikipedia.org/wiki/MIT_License
+
+The full text of the MIT License follows:
+
+========================================================================
+Copyright (c) 2007-2010 Baptiste Lepilleur and The JsonCpp Authors
+
+Permission is hereby granted, free of charge, to any person
+obtaining a copy of this software and associated documentation
+files (the "Software"), to deal in the Software without
+restriction, including without limitation the rights to use, copy,
+modify, merge, publish, distribute, sublicense, and/or sell copies
+of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
+========================================================================
+(END LICENSE TEXT)
+
+The MIT license is compatible with both the GPL and commercial
+software, affording one all of the rights of Public Domain with the
+minor nuisance of being required to keep the above copyright notice
+and license text in the source code. Note also that by accepting the
+Public Domain "license" you can re-license your copy using whatever
+license you like.
+
+*/
+
+// //////////////////////////////////////////////////////////////////////
+// End of content of file: LICENSE
+// //////////////////////////////////////////////////////////////////////
+
+
+
+
+
+#ifndef JSON_FORWARD_AMALGAMATED_H_INCLUDED
+# define JSON_FORWARD_AMALGAMATED_H_INCLUDED
+/// If defined, indicates that the source file is amalgamated
+/// to prevent private header inclusion.
+#define JSON_IS_AMALGAMATION
+
+// //////////////////////////////////////////////////////////////////////
+// Beginning of content of file: include/json/version.h
+// //////////////////////////////////////////////////////////////////////
+
+#ifndef JSON_VERSION_H_INCLUDED
+#define JSON_VERSION_H_INCLUDED
+
+// Note: version must be updated in three places when doing a release. This
+// annoying process ensures that amalgamate, CMake, and meson all report the
+// correct version.
+// 1. /meson.build
+// 2. /include/json/version.h
+// 3. /CMakeLists.txt
+// IMPORTANT: also update the SOVERSION!!
+
+#define JSONCPP_VERSION_STRING "1.9.5"
+#define JSONCPP_VERSION_MAJOR 1
+#define JSONCPP_VERSION_MINOR 9
+#define JSONCPP_VERSION_PATCH 5
+#define JSONCPP_VERSION_QUALIFIER
+#define JSONCPP_VERSION_HEXA                                                   \
+  ((JSONCPP_VERSION_MAJOR << 24) | (JSONCPP_VERSION_MINOR << 16) |             \
+   (JSONCPP_VERSION_PATCH << 8))
+
+#ifdef JSONCPP_USING_SECURE_MEMORY
+#undef JSONCPP_USING_SECURE_MEMORY
+#endif
+#define JSONCPP_USING_SECURE_MEMORY 0
+// If non-zero, the library zeroes any memory that it has allocated before
+// it frees its memory.
+
+#endif // JSON_VERSION_H_INCLUDED
+
+// //////////////////////////////////////////////////////////////////////
+// End of content of file: include/json/version.h
+// //////////////////////////////////////////////////////////////////////
+
+
+
+
+
+
+// //////////////////////////////////////////////////////////////////////
+// Beginning of content of file: include/json/allocator.h
+// //////////////////////////////////////////////////////////////////////
+
+// Copyright 2007-2010 Baptiste Lepilleur and The JsonCpp Authors
+// Distributed under MIT license, or public domain if desired and
+// recognized in your jurisdiction.
+// See file LICENSE for detail or copy at http://jsoncpp.sourceforge.net/LICENSE
+
+#ifndef JSON_ALLOCATOR_H_INCLUDED
+#define JSON_ALLOCATOR_H_INCLUDED
+
+#include <cstring>
+#include <memory>
+
+#pragma pack(push)
+#pragma pack()
+
+namespace Json {
+template <typename T> class SecureAllocator {
+public:
+  // Type definitions
+  using value_type = T;
+  using pointer = T*;
+  using const_pointer = const T*;
+  using reference = T&;
+  using const_reference = const T&;
+  using size_type = std::size_t;
+  using difference_type = std::ptrdiff_t;
+
+  /**
+   * Allocate memory for N items using the standard allocator.
+   */
+  pointer allocate(size_type n) {
+    // allocate using "global operator new"
+    return static_cast<pointer>(::operator new(n * sizeof(T)));
+  }
+
+  /**
+   * Release memory which was allocated for N items at pointer P.
+   *
+   * The memory block is filled with zeroes before being released.
+   */
+  void deallocate(pointer p, size_type n) {
+    // memset_s is used because memset may be optimized away by the compiler
+    memset_s(p, n * sizeof(T), 0, n * sizeof(T));
+    // free using "global operator delete"
+    ::operator delete(p);
+  }
+
+  /**
+   * Construct an item in-place at pointer P.
+   */
+  template <typename... Args> void construct(pointer p, Args&&... args) {
+    // construct using "placement new" and "perfect forwarding"
+    ::new (static_cast<void*>(p)) T(std::forward<Args>(args)...);
+  }
+
+  size_type max_size() const { return size_t(-1) / sizeof(T); }
+
+  pointer address(reference x) const { return std::addressof(x); }
+
+  const_pointer address(const_reference x) const { return std::addressof(x); }
+
+  /**
+   * Destroy an item in-place at pointer P.
+   */
+  void destroy(pointer p) {
+    // destroy using "explicit destructor"
+    p->~T();
+  }
+
+  // Boilerplate
+  SecureAllocator() {}
+  template <typename U> SecureAllocator(const SecureAllocator<U>&) {}
+  template <typename U> struct rebind { using other = SecureAllocator<U>; };
+};
+
+template <typename T, typename U>
+bool operator==(const SecureAllocator<T>&, const SecureAllocator<U>&) {
+  return true;
+}
+
+template <typename T, typename U>
+bool operator!=(const SecureAllocator<T>&, const SecureAllocator<U>&) {
+  return false;
+}
+
+} // namespace Json
+
+#pragma pack(pop)
+
+#endif // JSON_ALLOCATOR_H_INCLUDED
+
+// //////////////////////////////////////////////////////////////////////
+// End of content of file: include/json/allocator.h
+// //////////////////////////////////////////////////////////////////////
+
+
+
+
+
+
+// //////////////////////////////////////////////////////////////////////
+// Beginning of content of file: include/json/config.h
+// //////////////////////////////////////////////////////////////////////
+
+// Copyright 2007-2010 Baptiste Lepilleur and The JsonCpp Authors
+// Distributed under MIT license, or public domain if desired and
+// recognized in your jurisdiction.
+// See file LICENSE for detail or copy at http://jsoncpp.sourceforge.net/LICENSE
+
+#ifndef JSON_CONFIG_H_INCLUDED
+#define JSON_CONFIG_H_INCLUDED
+#include <cstddef>
+#include <cstdint>
+#include <istream>
+#include <memory>
+#include <ostream>
+#include <sstream>
+#include <string>
+#include <type_traits>
+
+// If non-zero, the library uses exceptions to report bad input instead of C
+// assertion macros. The default is to use exceptions.
+#ifndef JSON_USE_EXCEPTION
+#define JSON_USE_EXCEPTION 1
+#endif
+
+// Temporary, tracked for removal with issue #982.
+#ifndef JSON_USE_NULLREF
+#define JSON_USE_NULLREF 1
+#endif
+
+/// If defined, indicates that the source file is amalgamated
+/// to prevent private header inclusion.
+/// Remarks: it is automatically defined in the generated amalgamated header.
+// #define JSON_IS_AMALGAMATION
+
+// Export macros for DLL visibility
+#if defined(JSON_DLL_BUILD)
+#if defined(_MSC_VER) || defined(__MINGW32__)
+#define JSON_API __declspec(dllexport)
+#define JSONCPP_DISABLE_DLL_INTERFACE_WARNING
+#elif defined(__GNUC__) || defined(__clang__)
+#define JSON_API __attribute__((visibility("default")))
+#endif // if defined(_MSC_VER)
+
+#elif defined(JSON_DLL)
+#if defined(_MSC_VER) || defined(__MINGW32__)
+#define JSON_API __declspec(dllimport)
+#define JSONCPP_DISABLE_DLL_INTERFACE_WARNING
+#endif // if defined(_MSC_VER)
+#endif // ifdef JSON_DLL_BUILD
+
+#if !defined(JSON_API)
+#define JSON_API
+#endif
+
+#if defined(_MSC_VER) && _MSC_VER < 1800
+#error                                                                         \
+    "ERROR:  Visual Studio 12 (2013) with _MSC_VER=1800 is the oldest supported compiler with sufficient C++11 capabilities"
+#endif
+
+#if defined(_MSC_VER) && _MSC_VER < 1900
+// As recommended at
+// https://stackoverflow.com/questions/2915672/snprintf-and-visual-studio-2010
+extern JSON_API int msvc_pre1900_c99_snprintf(char* outBuf, size_t size,
+                                              const char* format, ...);
+#define jsoncpp_snprintf msvc_pre1900_c99_snprintf
+#else
+#define jsoncpp_snprintf std::snprintf
+#endif
+
+// If JSON_NO_INT64 is defined, then Json only support C++ "int" type for
+// integer
+// Storages, and 64 bits integer support is disabled.
+// #define JSON_NO_INT64 1
+
+// JSONCPP_OVERRIDE is maintained for backwards compatibility of external tools.
+// C++11 should be used directly in JSONCPP.
+#define JSONCPP_OVERRIDE override
+
+#ifdef __clang__
+#if __has_extension(attribute_deprecated_with_message)
+#define JSONCPP_DEPRECATED(message) __attribute__((deprecated(message)))
+#endif
+#elif defined(__GNUC__) // not clang (gcc comes later since clang emulates gcc)
+#if (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 5))
+#define JSONCPP_DEPRECATED(message) __attribute__((deprecated(message)))
+#elif (__GNUC__ > 3 || (__GNUC__ == 3 && __GNUC_MINOR__ >= 1))
+#define JSONCPP_DEPRECATED(message) __attribute__((__deprecated__))
+#endif                  // GNUC version
+#elif defined(_MSC_VER) // MSVC (after clang because clang on Windows emulates
+                        // MSVC)
+#define JSONCPP_DEPRECATED(message) __declspec(deprecated(message))
+#endif // __clang__ || __GNUC__ || _MSC_VER
+
+#if !defined(JSONCPP_DEPRECATED)
+#define JSONCPP_DEPRECATED(message)
+#endif // if !defined(JSONCPP_DEPRECATED)
+
+#if defined(__clang__) || (defined(__GNUC__) && (__GNUC__ >= 6))
+#define JSON_USE_INT64_DOUBLE_CONVERSION 1
+#endif
+
+#if !defined(JSON_IS_AMALGAMATION)
+
+#include "allocator.h"
+#include "version.h"
+
+#endif // if !defined(JSON_IS_AMALGAMATION)
+
+namespace Json {
+using Int = int;
+using UInt = unsigned int;
+#if defined(JSON_NO_INT64)
+using LargestInt = int;
+using LargestUInt = unsigned int;
+#undef JSON_HAS_INT64
+#else                 // if defined(JSON_NO_INT64)
+// For Microsoft Visual use specific types as long long is not supported
+#if defined(_MSC_VER) // Microsoft Visual Studio
+using Int64 = __int64;
+using UInt64 = unsigned __int64;
+#else                 // if defined(_MSC_VER) // Other platforms, use long long
+using Int64 = int64_t;
+using UInt64 = uint64_t;
+#endif                // if defined(_MSC_VER)
+using LargestInt = Int64;
+using LargestUInt = UInt64;
+#define JSON_HAS_INT64
+#endif // if defined(JSON_NO_INT64)
+
+template <typename T>
+using Allocator =
+    typename std::conditional<JSONCPP_USING_SECURE_MEMORY, SecureAllocator<T>,
+                              std::allocator<T>>::type;
+using String = std::basic_string<char, std::char_traits<char>, Allocator<char>>;
+using IStringStream =
+    std::basic_istringstream<String::value_type, String::traits_type,
+                             String::allocator_type>;
+using OStringStream =
+    std::basic_ostringstream<String::value_type, String::traits_type,
+                             String::allocator_type>;
+using IStream = std::istream;
+using OStream = std::ostream;
+} // namespace Json
+
+// Legacy names (formerly macros).
+using JSONCPP_STRING = Json::String;
+using JSONCPP_ISTRINGSTREAM = Json::IStringStream;
+using JSONCPP_OSTRINGSTREAM = Json::OStringStream;
+using JSONCPP_ISTREAM = Json::IStream;
+using JSONCPP_OSTREAM = Json::OStream;
+
+#endif // JSON_CONFIG_H_INCLUDED
+
+// //////////////////////////////////////////////////////////////////////
+// End of content of file: include/json/config.h
+// //////////////////////////////////////////////////////////////////////
+
+
+
+
+
+
+// //////////////////////////////////////////////////////////////////////
+// Beginning of content of file: include/json/forwards.h
+// //////////////////////////////////////////////////////////////////////
+
+// Copyright 2007-2010 Baptiste Lepilleur and The JsonCpp Authors
+// Distributed under MIT license, or public domain if desired and
+// recognized in your jurisdiction.
+// See file LICENSE for detail or copy at http://jsoncpp.sourceforge.net/LICENSE
+
+#ifndef JSON_FORWARDS_H_INCLUDED
+#define JSON_FORWARDS_H_INCLUDED
+
+#if !defined(JSON_IS_AMALGAMATION)
+#include "config.h"
+#endif // if !defined(JSON_IS_AMALGAMATION)
+
+namespace Json {
+
+// writer.h
+class StreamWriter;
+class StreamWriterBuilder;
+class Writer;
+class FastWriter;
+class StyledWriter;
+class StyledStreamWriter;
+
+// reader.h
+class Reader;
+class CharReader;
+class CharReaderBuilder;
+
+// json_features.h
+class Features;
+
+// value.h
+using ArrayIndex = unsigned int;
+class StaticString;
+class Path;
+class PathArgument;
+class Value;
+class ValueIteratorBase;
+class ValueIterator;
+class ValueConstIterator;
+
+} // namespace Json
+
+#endif // JSON_FORWARDS_H_INCLUDED
+
+// //////////////////////////////////////////////////////////////////////
+// End of content of file: include/json/forwards.h
+// //////////////////////////////////////////////////////////////////////
+
+
+
+
+
+#endif //ifndef JSON_FORWARD_AMALGAMATED_H_INCLUDED
diff --git a/third_party/jsoncpp/json/json.h b/third_party/jsoncpp/json/json.h
new file mode 100644
index 0000000..d95fe6e
--- /dev/null
+++ b/third_party/jsoncpp/json/json.h
@@ -0,0 +1,2351 @@
+/// Json-cpp amalgamated header (http://jsoncpp.sourceforge.net/).
+/// It is intended to be used with #include "json/json.h"
+
+// //////////////////////////////////////////////////////////////////////
+// Beginning of content of file: LICENSE
+// //////////////////////////////////////////////////////////////////////
+
+/*
+The JsonCpp library's source code, including accompanying documentation,
+tests and demonstration applications, are licensed under the following
+conditions...
+
+Baptiste Lepilleur and The JsonCpp Authors explicitly disclaim copyright in all
+jurisdictions which recognize such a disclaimer. In such jurisdictions,
+this software is released into the Public Domain.
+
+In jurisdictions which do not recognize Public Domain property (e.g. Germany as of
+2010), this software is Copyright (c) 2007-2010 by Baptiste Lepilleur and
+The JsonCpp Authors, and is released under the terms of the MIT License (see below).
+
+In jurisdictions which recognize Public Domain property, the user of this
+software may choose to accept it either as 1) Public Domain, 2) under the
+conditions of the MIT License (see below), or 3) under the terms of dual
+Public Domain/MIT License conditions described here, as they choose.
+
+The MIT License is about as close to Public Domain as a license can get, and is
+described in clear, concise terms at:
+
+   http://en.wikipedia.org/wiki/MIT_License
+
+The full text of the MIT License follows:
+
+========================================================================
+Copyright (c) 2007-2010 Baptiste Lepilleur and The JsonCpp Authors
+
+Permission is hereby granted, free of charge, to any person
+obtaining a copy of this software and associated documentation
+files (the "Software"), to deal in the Software without
+restriction, including without limitation the rights to use, copy,
+modify, merge, publish, distribute, sublicense, and/or sell copies
+of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
+========================================================================
+(END LICENSE TEXT)
+
+The MIT license is compatible with both the GPL and commercial
+software, affording one all of the rights of Public Domain with the
+minor nuisance of being required to keep the above copyright notice
+and license text in the source code. Note also that by accepting the
+Public Domain "license" you can re-license your copy using whatever
+license you like.
+
+*/
+
+// //////////////////////////////////////////////////////////////////////
+// End of content of file: LICENSE
+// //////////////////////////////////////////////////////////////////////
+
+
+
+
+
+#ifndef JSON_AMALGAMATED_H_INCLUDED
+# define JSON_AMALGAMATED_H_INCLUDED
+/// If defined, indicates that the source file is amalgamated
+/// to prevent private header inclusion.
+#define JSON_IS_AMALGAMATION
+
+// //////////////////////////////////////////////////////////////////////
+// Beginning of content of file: include/json/version.h
+// //////////////////////////////////////////////////////////////////////
+
+#ifndef JSON_VERSION_H_INCLUDED
+#define JSON_VERSION_H_INCLUDED
+
+// Note: version must be updated in three places when doing a release. This
+// annoying process ensures that amalgamate, CMake, and meson all report the
+// correct version.
+// 1. /meson.build
+// 2. /include/json/version.h
+// 3. /CMakeLists.txt
+// IMPORTANT: also update the SOVERSION!!
+
+#define JSONCPP_VERSION_STRING "1.9.5"
+#define JSONCPP_VERSION_MAJOR 1
+#define JSONCPP_VERSION_MINOR 9
+#define JSONCPP_VERSION_PATCH 5
+#define JSONCPP_VERSION_QUALIFIER
+#define JSONCPP_VERSION_HEXA                                                   \
+  ((JSONCPP_VERSION_MAJOR << 24) | (JSONCPP_VERSION_MINOR << 16) |             \
+   (JSONCPP_VERSION_PATCH << 8))
+
+#ifdef JSONCPP_USING_SECURE_MEMORY
+#undef JSONCPP_USING_SECURE_MEMORY
+#endif
+#define JSONCPP_USING_SECURE_MEMORY 0
+// If non-zero, the library zeroes any memory that it has allocated before
+// it frees its memory.
+
+#endif // JSON_VERSION_H_INCLUDED
+
+// //////////////////////////////////////////////////////////////////////
+// End of content of file: include/json/version.h
+// //////////////////////////////////////////////////////////////////////
+
+
+
+
+
+
+// //////////////////////////////////////////////////////////////////////
+// Beginning of content of file: include/json/allocator.h
+// //////////////////////////////////////////////////////////////////////
+
+// Copyright 2007-2010 Baptiste Lepilleur and The JsonCpp Authors
+// Distributed under MIT license, or public domain if desired and
+// recognized in your jurisdiction.
+// See file LICENSE for detail or copy at http://jsoncpp.sourceforge.net/LICENSE
+
+#ifndef JSON_ALLOCATOR_H_INCLUDED
+#define JSON_ALLOCATOR_H_INCLUDED
+
+#include <cstring>
+#include <memory>
+
+#pragma pack(push)
+#pragma pack()
+
+namespace Json {
+template <typename T> class SecureAllocator {
+public:
+  // Type definitions
+  using value_type = T;
+  using pointer = T*;
+  using const_pointer = const T*;
+  using reference = T&;
+  using const_reference = const T&;
+  using size_type = std::size_t;
+  using difference_type = std::ptrdiff_t;
+
+  /**
+   * Allocate memory for N items using the standard allocator.
+   */
+  pointer allocate(size_type n) {
+    // allocate using "global operator new"
+    return static_cast<pointer>(::operator new(n * sizeof(T)));
+  }
+
+  /**
+   * Release memory which was allocated for N items at pointer P.
+   *
+   * The memory block is filled with zeroes before being released.
+   */
+  void deallocate(pointer p, size_type n) {
+    // memset_s is used because memset may be optimized away by the compiler
+    memset_s(p, n * sizeof(T), 0, n * sizeof(T));
+    // free using "global operator delete"
+    ::operator delete(p);
+  }
+
+  /**
+   * Construct an item in-place at pointer P.
+   */
+  template <typename... Args> void construct(pointer p, Args&&... args) {
+    // construct using "placement new" and "perfect forwarding"
+    ::new (static_cast<void*>(p)) T(std::forward<Args>(args)...);
+  }
+
+  size_type max_size() const { return size_t(-1) / sizeof(T); }
+
+  pointer address(reference x) const { return std::addressof(x); }
+
+  const_pointer address(const_reference x) const { return std::addressof(x); }
+
+  /**
+   * Destroy an item in-place at pointer P.
+   */
+  void destroy(pointer p) {
+    // destroy using "explicit destructor"
+    p->~T();
+  }
+
+  // Boilerplate
+  SecureAllocator() {}
+  template <typename U> SecureAllocator(const SecureAllocator<U>&) {}
+  template <typename U> struct rebind { using other = SecureAllocator<U>; };
+};
+
+template <typename T, typename U>
+bool operator==(const SecureAllocator<T>&, const SecureAllocator<U>&) {
+  return true;
+}
+
+template <typename T, typename U>
+bool operator!=(const SecureAllocator<T>&, const SecureAllocator<U>&) {
+  return false;
+}
+
+} // namespace Json
+
+#pragma pack(pop)
+
+#endif // JSON_ALLOCATOR_H_INCLUDED
+
+// //////////////////////////////////////////////////////////////////////
+// End of content of file: include/json/allocator.h
+// //////////////////////////////////////////////////////////////////////
+
+
+
+
+
+
+// //////////////////////////////////////////////////////////////////////
+// Beginning of content of file: include/json/config.h
+// //////////////////////////////////////////////////////////////////////
+
+// Copyright 2007-2010 Baptiste Lepilleur and The JsonCpp Authors
+// Distributed under MIT license, or public domain if desired and
+// recognized in your jurisdiction.
+// See file LICENSE for detail or copy at http://jsoncpp.sourceforge.net/LICENSE
+
+#ifndef JSON_CONFIG_H_INCLUDED
+#define JSON_CONFIG_H_INCLUDED
+#include <cstddef>
+#include <cstdint>
+#include <istream>
+#include <memory>
+#include <ostream>
+#include <sstream>
+#include <string>
+#include <type_traits>
+
+// If non-zero, the library uses exceptions to report bad input instead of C
+// assertion macros. The default is to use exceptions.
+#ifndef JSON_USE_EXCEPTION
+#define JSON_USE_EXCEPTION 1
+#endif
+
+// Temporary, tracked for removal with issue #982.
+#ifndef JSON_USE_NULLREF
+#define JSON_USE_NULLREF 1
+#endif
+
+/// If defined, indicates that the source file is amalgamated
+/// to prevent private header inclusion.
+/// Remarks: it is automatically defined in the generated amalgamated header.
+// #define JSON_IS_AMALGAMATION
+
+// Export macros for DLL visibility
+#if defined(JSON_DLL_BUILD)
+#if defined(_MSC_VER) || defined(__MINGW32__)
+#define JSON_API __declspec(dllexport)
+#define JSONCPP_DISABLE_DLL_INTERFACE_WARNING
+#elif defined(__GNUC__) || defined(__clang__)
+#define JSON_API __attribute__((visibility("default")))
+#endif // if defined(_MSC_VER)
+
+#elif defined(JSON_DLL)
+#if defined(_MSC_VER) || defined(__MINGW32__)
+#define JSON_API __declspec(dllimport)
+#define JSONCPP_DISABLE_DLL_INTERFACE_WARNING
+#endif // if defined(_MSC_VER)
+#endif // ifdef JSON_DLL_BUILD
+
+#if !defined(JSON_API)
+#define JSON_API
+#endif
+
+#if defined(_MSC_VER) && _MSC_VER < 1800
+#error                                                                         \
+    "ERROR:  Visual Studio 12 (2013) with _MSC_VER=1800 is the oldest supported compiler with sufficient C++11 capabilities"
+#endif
+
+#if defined(_MSC_VER) && _MSC_VER < 1900
+// As recommended at
+// https://stackoverflow.com/questions/2915672/snprintf-and-visual-studio-2010
+extern JSON_API int msvc_pre1900_c99_snprintf(char* outBuf, size_t size,
+                                              const char* format, ...);
+#define jsoncpp_snprintf msvc_pre1900_c99_snprintf
+#else
+#define jsoncpp_snprintf std::snprintf
+#endif
+
+// If JSON_NO_INT64 is defined, then Json only support C++ "int" type for
+// integer
+// Storages, and 64 bits integer support is disabled.
+// #define JSON_NO_INT64 1
+
+// JSONCPP_OVERRIDE is maintained for backwards compatibility of external tools.
+// C++11 should be used directly in JSONCPP.
+#define JSONCPP_OVERRIDE override
+
+#ifdef __clang__
+#if __has_extension(attribute_deprecated_with_message)
+#define JSONCPP_DEPRECATED(message) __attribute__((deprecated(message)))
+#endif
+#elif defined(__GNUC__) // not clang (gcc comes later since clang emulates gcc)
+#if (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 5))
+#define JSONCPP_DEPRECATED(message) __attribute__((deprecated(message)))
+#elif (__GNUC__ > 3 || (__GNUC__ == 3 && __GNUC_MINOR__ >= 1))
+#define JSONCPP_DEPRECATED(message) __attribute__((__deprecated__))
+#endif                  // GNUC version
+#elif defined(_MSC_VER) // MSVC (after clang because clang on Windows emulates
+                        // MSVC)
+#define JSONCPP_DEPRECATED(message) __declspec(deprecated(message))
+#endif // __clang__ || __GNUC__ || _MSC_VER
+
+#if !defined(JSONCPP_DEPRECATED)
+#define JSONCPP_DEPRECATED(message)
+#endif // if !defined(JSONCPP_DEPRECATED)
+
+#if defined(__clang__) || (defined(__GNUC__) && (__GNUC__ >= 6))
+#define JSON_USE_INT64_DOUBLE_CONVERSION 1
+#endif
+
+#if !defined(JSON_IS_AMALGAMATION)
+
+#include "allocator.h"
+#include "version.h"
+
+#endif // if !defined(JSON_IS_AMALGAMATION)
+
+namespace Json {
+using Int = int;
+using UInt = unsigned int;
+#if defined(JSON_NO_INT64)
+using LargestInt = int;
+using LargestUInt = unsigned int;
+#undef JSON_HAS_INT64
+#else                 // if defined(JSON_NO_INT64)
+// For Microsoft Visual use specific types as long long is not supported
+#if defined(_MSC_VER) // Microsoft Visual Studio
+using Int64 = __int64;
+using UInt64 = unsigned __int64;
+#else                 // if defined(_MSC_VER) // Other platforms, use long long
+using Int64 = int64_t;
+using UInt64 = uint64_t;
+#endif                // if defined(_MSC_VER)
+using LargestInt = Int64;
+using LargestUInt = UInt64;
+#define JSON_HAS_INT64
+#endif // if defined(JSON_NO_INT64)
+
+template <typename T>
+using Allocator =
+    typename std::conditional<JSONCPP_USING_SECURE_MEMORY, SecureAllocator<T>,
+                              std::allocator<T>>::type;
+using String = std::basic_string<char, std::char_traits<char>, Allocator<char>>;
+using IStringStream =
+    std::basic_istringstream<String::value_type, String::traits_type,
+                             String::allocator_type>;
+using OStringStream =
+    std::basic_ostringstream<String::value_type, String::traits_type,
+                             String::allocator_type>;
+using IStream = std::istream;
+using OStream = std::ostream;
+} // namespace Json
+
+// Legacy names (formerly macros).
+using JSONCPP_STRING = Json::String;
+using JSONCPP_ISTRINGSTREAM = Json::IStringStream;
+using JSONCPP_OSTRINGSTREAM = Json::OStringStream;
+using JSONCPP_ISTREAM = Json::IStream;
+using JSONCPP_OSTREAM = Json::OStream;
+
+#endif // JSON_CONFIG_H_INCLUDED
+
+// //////////////////////////////////////////////////////////////////////
+// End of content of file: include/json/config.h
+// //////////////////////////////////////////////////////////////////////
+
+
+
+
+
+
+// //////////////////////////////////////////////////////////////////////
+// Beginning of content of file: include/json/forwards.h
+// //////////////////////////////////////////////////////////////////////
+
+// Copyright 2007-2010 Baptiste Lepilleur and The JsonCpp Authors
+// Distributed under MIT license, or public domain if desired and
+// recognized in your jurisdiction.
+// See file LICENSE for detail or copy at http://jsoncpp.sourceforge.net/LICENSE
+
+#ifndef JSON_FORWARDS_H_INCLUDED
+#define JSON_FORWARDS_H_INCLUDED
+
+#if !defined(JSON_IS_AMALGAMATION)
+#include "config.h"
+#endif // if !defined(JSON_IS_AMALGAMATION)
+
+namespace Json {
+
+// writer.h
+class StreamWriter;
+class StreamWriterBuilder;
+class Writer;
+class FastWriter;
+class StyledWriter;
+class StyledStreamWriter;
+
+// reader.h
+class Reader;
+class CharReader;
+class CharReaderBuilder;
+
+// json_features.h
+class Features;
+
+// value.h
+using ArrayIndex = unsigned int;
+class StaticString;
+class Path;
+class PathArgument;
+class Value;
+class ValueIteratorBase;
+class ValueIterator;
+class ValueConstIterator;
+
+} // namespace Json
+
+#endif // JSON_FORWARDS_H_INCLUDED
+
+// //////////////////////////////////////////////////////////////////////
+// End of content of file: include/json/forwards.h
+// //////////////////////////////////////////////////////////////////////
+
+
+
+
+
+
+// //////////////////////////////////////////////////////////////////////
+// Beginning of content of file: include/json/json_features.h
+// //////////////////////////////////////////////////////////////////////
+
+// Copyright 2007-2010 Baptiste Lepilleur and The JsonCpp Authors
+// Distributed under MIT license, or public domain if desired and
+// recognized in your jurisdiction.
+// See file LICENSE for detail or copy at http://jsoncpp.sourceforge.net/LICENSE
+
+#ifndef JSON_FEATURES_H_INCLUDED
+#define JSON_FEATURES_H_INCLUDED
+
+#if !defined(JSON_IS_AMALGAMATION)
+#include "forwards.h"
+#endif // if !defined(JSON_IS_AMALGAMATION)
+
+#pragma pack(push)
+#pragma pack()
+
+namespace Json {
+
+/** \brief Configuration passed to reader and writer.
+ * This configuration object can be used to force the Reader or Writer
+ * to behave in a standard conforming way.
+ */
+class JSON_API Features {
+public:
+  /** \brief A configuration that allows all features and assumes all strings
+   * are UTF-8.
+   * - C & C++ comments are allowed
+   * - Root object can be any JSON value
+   * - Assumes Value strings are encoded in UTF-8
+   */
+  static Features all();
+
+  /** \brief A configuration that is strictly compatible with the JSON
+   * specification.
+   * - Comments are forbidden.
+   * - Root object must be either an array or an object value.
+   * - Assumes Value strings are encoded in UTF-8
+   */
+  static Features strictMode();
+
+  /** \brief Initialize the configuration like JsonConfig::allFeatures;
+   */
+  Features();
+
+  /// \c true if comments are allowed. Default: \c true.
+  bool allowComments_{true};
+
+  /// \c true if root must be either an array or an object value. Default: \c
+  /// false.
+  bool strictRoot_{false};
+
+  /// \c true if dropped null placeholders are allowed. Default: \c false.
+  bool allowDroppedNullPlaceholders_{false};
+
+  /// \c true if numeric object key are allowed. Default: \c false.
+  bool allowNumericKeys_{false};
+};
+
+} // namespace Json
+
+#pragma pack(pop)
+
+#endif // JSON_FEATURES_H_INCLUDED
+
+// //////////////////////////////////////////////////////////////////////
+// End of content of file: include/json/json_features.h
+// //////////////////////////////////////////////////////////////////////
+
+
+
+
+
+
+// //////////////////////////////////////////////////////////////////////
+// Beginning of content of file: include/json/value.h
+// //////////////////////////////////////////////////////////////////////
+
+// Copyright 2007-2010 Baptiste Lepilleur and The JsonCpp Authors
+// Distributed under MIT license, or public domain if desired and
+// recognized in your jurisdiction.
+// See file LICENSE for detail or copy at http://jsoncpp.sourceforge.net/LICENSE
+
+#ifndef JSON_H_INCLUDED
+#define JSON_H_INCLUDED
+
+#if !defined(JSON_IS_AMALGAMATION)
+#include "forwards.h"
+#endif // if !defined(JSON_IS_AMALGAMATION)
+
+// Conditional NORETURN attribute on the throw functions would:
+// a) suppress false positives from static code analysis
+// b) possibly improve optimization opportunities.
+#if !defined(JSONCPP_NORETURN)
+#if defined(_MSC_VER) && _MSC_VER == 1800
+#define JSONCPP_NORETURN __declspec(noreturn)
+#else
+#define JSONCPP_NORETURN [[noreturn]]
+#endif
+#endif
+
+// Support for '= delete' with template declarations was a late addition
+// to the c++11 standard and is rejected by clang 3.8 and Apple clang 8.2
+// even though these declare themselves to be c++11 compilers.
+#if !defined(JSONCPP_TEMPLATE_DELETE)
+#if defined(__clang__) && defined(__apple_build_version__)
+#if __apple_build_version__ <= 8000042
+#define JSONCPP_TEMPLATE_DELETE
+#endif
+#elif defined(__clang__)
+#if __clang_major__ == 3 && __clang_minor__ <= 8
+#define JSONCPP_TEMPLATE_DELETE
+#endif
+#endif
+#if !defined(JSONCPP_TEMPLATE_DELETE)
+#define JSONCPP_TEMPLATE_DELETE = delete
+#endif
+#endif
+
+#include <array>
+#include <exception>
+#include <map>
+#include <memory>
+#include <string>
+#include <vector>
+
+// Disable warning C4251: <data member>: <type> needs to have dll-interface to
+// be used by...
+#if defined(JSONCPP_DISABLE_DLL_INTERFACE_WARNING)
+#pragma warning(push)
+#pragma warning(disable : 4251 4275)
+#endif // if defined(JSONCPP_DISABLE_DLL_INTERFACE_WARNING)
+
+#pragma pack(push)
+#pragma pack()
+
+/** \brief JSON (JavaScript Object Notation).
+ */
+namespace Json {
+
+#if JSON_USE_EXCEPTION
+/** Base class for all exceptions we throw.
+ *
+ * We use nothing but these internally. Of course, STL can throw others.
+ */
+class JSON_API Exception : public std::exception {
+public:
+  Exception(String msg);
+  ~Exception() noexcept override;
+  char const* what() const noexcept override;
+
+protected:
+  String msg_;
+};
+
+/** Exceptions which the user cannot easily avoid.
+ *
+ * E.g. out-of-memory (when we use malloc), stack-overflow, malicious input
+ *
+ * \remark derived from Json::Exception
+ */
+class JSON_API RuntimeError : public Exception {
+public:
+  RuntimeError(String const& msg);
+};
+
+/** Exceptions thrown by JSON_ASSERT/JSON_FAIL macros.
+ *
+ * These are precondition-violations (user bugs) and internal errors (our bugs).
+ *
+ * \remark derived from Json::Exception
+ */
+class JSON_API LogicError : public Exception {
+public:
+  LogicError(String const& msg);
+};
+#endif
+
+/// used internally
+JSONCPP_NORETURN void throwRuntimeError(String const& msg);
+/// used internally
+JSONCPP_NORETURN void throwLogicError(String const& msg);
+
+/** \brief Type of the value held by a Value object.
+ */
+enum ValueType {
+  nullValue = 0, ///< 'null' value
+  intValue,      ///< signed integer value
+  uintValue,     ///< unsigned integer value
+  realValue,     ///< double value
+  stringValue,   ///< UTF-8 string value
+  booleanValue,  ///< bool value
+  arrayValue,    ///< array value (ordered list)
+  objectValue    ///< object value (collection of name/value pairs).
+};
+
+enum CommentPlacement {
+  commentBefore = 0,      ///< a comment placed on the line before a value
+  commentAfterOnSameLine, ///< a comment just after a value on the same line
+  commentAfter, ///< a comment on the line after a value (only make sense for
+  /// root value)
+  numberOfCommentPlacement
+};
+
+/** \brief Type of precision for formatting of real values.
+ */
+enum PrecisionType {
+  significantDigits = 0, ///< we set max number of significant digits in string
+  decimalPlaces          ///< we set max number of digits after "." in string
+};
+
+/** \brief Lightweight wrapper to tag static string.
+ *
+ * Value constructor and objectValue member assignment takes advantage of the
+ * StaticString and avoid the cost of string duplication when storing the
+ * string or the member name.
+ *
+ * Example of usage:
+ * \code
+ * Json::Value aValue( StaticString("some text") );
+ * Json::Value object;
+ * static const StaticString code("code");
+ * object[code] = 1234;
+ * \endcode
+ */
+class JSON_API StaticString {
+public:
+  explicit StaticString(const char* czstring) : c_str_(czstring) {}
+
+  operator const char*() const { return c_str_; }
+
+  const char* c_str() const { return c_str_; }
+
+private:
+  const char* c_str_;
+};
+
+/** \brief Represents a <a HREF="http://www.json.org">JSON</a> value.
+ *
+ * This class is a discriminated union wrapper that can represents a:
+ * - signed integer [range: Value::minInt - Value::maxInt]
+ * - unsigned integer (range: 0 - Value::maxUInt)
+ * - double
+ * - UTF-8 string
+ * - boolean
+ * - 'null'
+ * - an ordered list of Value
+ * - collection of name/value pairs (javascript object)
+ *
+ * The type of the held value is represented by a #ValueType and
+ * can be obtained using type().
+ *
+ * Values of an #objectValue or #arrayValue can be accessed using operator[]()
+ * methods.
+ * Non-const methods will automatically create the a #nullValue element
+ * if it does not exist.
+ * The sequence of an #arrayValue will be automatically resized and initialized
+ * with #nullValue. resize() can be used to enlarge or truncate an #arrayValue.
+ *
+ * The get() methods can be used to obtain default value in the case the
+ * required element does not exist.
+ *
+ * It is possible to iterate over the list of member keys of an object using
+ * the getMemberNames() method.
+ *
+ * \note #Value string-length fit in size_t, but keys must be < 2^30.
+ * (The reason is an implementation detail.) A #CharReader will raise an
+ * exception if a bound is exceeded to avoid security holes in your app,
+ * but the Value API does *not* check bounds. That is the responsibility
+ * of the caller.
+ */
+class JSON_API Value {
+  friend class ValueIteratorBase;
+
+public:
+  using Members = std::vector<String>;
+  using iterator = ValueIterator;
+  using const_iterator = ValueConstIterator;
+  using UInt = Json::UInt;
+  using Int = Json::Int;
+#if defined(JSON_HAS_INT64)
+  using UInt64 = Json::UInt64;
+  using Int64 = Json::Int64;
+#endif // defined(JSON_HAS_INT64)
+  using LargestInt = Json::LargestInt;
+  using LargestUInt = Json::LargestUInt;
+  using ArrayIndex = Json::ArrayIndex;
+
+  // Required for boost integration, e. g. BOOST_TEST
+  using value_type = std::string;
+
+#if JSON_USE_NULLREF
+  // Binary compatibility kludges, do not use.
+  static const Value& null;
+  static const Value& nullRef;
+#endif
+
+  // null and nullRef are deprecated, use this instead.
+  static Value const& nullSingleton();
+
+  /// Minimum signed integer value that can be stored in a Json::Value.
+  static constexpr LargestInt minLargestInt =
+      LargestInt(~(LargestUInt(-1) / 2));
+  /// Maximum signed integer value that can be stored in a Json::Value.
+  static constexpr LargestInt maxLargestInt = LargestInt(LargestUInt(-1) / 2);
+  /// Maximum unsigned integer value that can be stored in a Json::Value.
+  static constexpr LargestUInt maxLargestUInt = LargestUInt(-1);
+
+  /// Minimum signed int value that can be stored in a Json::Value.
+  static constexpr Int minInt = Int(~(UInt(-1) / 2));
+  /// Maximum signed int value that can be stored in a Json::Value.
+  static constexpr Int maxInt = Int(UInt(-1) / 2);
+  /// Maximum unsigned int value that can be stored in a Json::Value.
+  static constexpr UInt maxUInt = UInt(-1);
+
+#if defined(JSON_HAS_INT64)
+  /// Minimum signed 64 bits int value that can be stored in a Json::Value.
+  static constexpr Int64 minInt64 = Int64(~(UInt64(-1) / 2));
+  /// Maximum signed 64 bits int value that can be stored in a Json::Value.
+  static constexpr Int64 maxInt64 = Int64(UInt64(-1) / 2);
+  /// Maximum unsigned 64 bits int value that can be stored in a Json::Value.
+  static constexpr UInt64 maxUInt64 = UInt64(-1);
+#endif // defined(JSON_HAS_INT64)
+  /// Default precision for real value for string representation.
+  static constexpr UInt defaultRealPrecision = 17;
+  // The constant is hard-coded because some compiler have trouble
+  // converting Value::maxUInt64 to a double correctly (AIX/xlC).
+  // Assumes that UInt64 is a 64 bits integer.
+  static constexpr double maxUInt64AsDouble = 18446744073709551615.0;
+// Workaround for bug in the NVIDIAs CUDA 9.1 nvcc compiler
+// when using gcc and clang backend compilers.  CZString
+// cannot be defined as private.  See issue #486
+#ifdef __NVCC__
+public:
+#else
+private:
+#endif
+#ifndef JSONCPP_DOC_EXCLUDE_IMPLEMENTATION
+  class CZString {
+  public:
+    enum DuplicationPolicy { noDuplication = 0, duplicate, duplicateOnCopy };
+    CZString(ArrayIndex index);
+    CZString(char const* str, unsigned length, DuplicationPolicy allocate);
+    CZString(CZString const& other);
+    CZString(CZString&& other) noexcept;
+    ~CZString();
+    CZString& operator=(const CZString& other);
+    CZString& operator=(CZString&& other) noexcept;
+
+    bool operator<(CZString const& other) const;
+    bool operator==(CZString const& other) const;
+    ArrayIndex index() const;
+    // const char* c_str() const; ///< \deprecated
+    char const* data() const;
+    unsigned length() const;
+    bool isStaticString() const;
+
+  private:
+    void swap(CZString& other);
+
+    struct StringStorage {
+      unsigned policy_ : 2;
+      unsigned length_ : 30; // 1GB max
+    };
+
+    char const* cstr_; // actually, a prefixed string, unless policy is noDup
+    union {
+      ArrayIndex index_;
+      StringStorage storage_;
+    };
+  };
+
+public:
+  typedef std::map<CZString, Value> ObjectValues;
+#endif // ifndef JSONCPP_DOC_EXCLUDE_IMPLEMENTATION
+
+public:
+  /**
+   * \brief Create a default Value of the given type.
+   *
+   * This is a very useful constructor.
+   * To create an empty array, pass arrayValue.
+   * To create an empty object, pass objectValue.
+   * Another Value can then be set to this one by assignment.
+   * This is useful since clear() and resize() will not alter types.
+   *
+   * Examples:
+   *   \code
+   *   Json::Value null_value; // null
+   *   Json::Value arr_value(Json::arrayValue); // []
+   *   Json::Value obj_value(Json::objectValue); // {}
+   *   \endcode
+   */
+  Value(ValueType type = nullValue);
+  Value(Int value);
+  Value(UInt value);
+#if defined(JSON_HAS_INT64)
+  Value(Int64 value);
+  Value(UInt64 value);
+#endif // if defined(JSON_HAS_INT64)
+  Value(double value);
+  Value(const char* value); ///< Copy til first 0. (NULL causes to seg-fault.)
+  Value(const char* begin, const char* end); ///< Copy all, incl zeroes.
+  /**
+   * \brief Constructs a value from a static string.
+   *
+   * Like other value string constructor but do not duplicate the string for
+   * internal storage. The given string must remain alive after the call to
+   * this constructor.
+   *
+   * \note This works only for null-terminated strings. (We cannot change the
+   * size of this class, so we have nowhere to store the length, which might be
+   * computed later for various operations.)
+   *
+   * Example of usage:
+   *   \code
+   *   static StaticString foo("some text");
+   *   Json::Value aValue(foo);
+   *   \endcode
+   */
+  Value(const StaticString& value);
+  Value(const String& value);
+  Value(bool value);
+  Value(std::nullptr_t ptr) = delete;
+  Value(const Value& other);
+  Value(Value&& other) noexcept;
+  ~Value();
+
+  /// \note Overwrite existing comments. To preserve comments, use
+  /// #swapPayload().
+  Value& operator=(const Value& other);
+  Value& operator=(Value&& other) noexcept;
+
+  /// Swap everything.
+  void swap(Value& other);
+  /// Swap values but leave comments and source offsets in place.
+  void swapPayload(Value& other);
+
+  /// copy everything.
+  void copy(const Value& other);
+  /// copy values but leave comments and source offsets in place.
+  void copyPayload(const Value& other);
+
+  ValueType type() const;
+
+  /// Compare payload only, not comments etc.
+  bool operator<(const Value& other) const;
+  bool operator<=(const Value& other) const;
+  bool operator>=(const Value& other) const;
+  bool operator>(const Value& other) const;
+  bool operator==(const Value& other) const;
+  bool operator!=(const Value& other) const;
+  int compare(const Value& other) const;
+
+  const char* asCString() const; ///< Embedded zeroes could cause you trouble!
+#if JSONCPP_USING_SECURE_MEMORY
+  unsigned getCStringLength() const; // Allows you to understand the length of
+                                     // the CString
+#endif
+  String asString() const; ///< Embedded zeroes are possible.
+  /** Get raw char* of string-value.
+   *  \return false if !string. (Seg-fault if str or end are NULL.)
+   */
+  bool getString(char const** begin, char const** end) const;
+  Int asInt() const;
+  UInt asUInt() const;
+#if defined(JSON_HAS_INT64)
+  Int64 asInt64() const;
+  UInt64 asUInt64() const;
+#endif // if defined(JSON_HAS_INT64)
+  LargestInt asLargestInt() const;
+  LargestUInt asLargestUInt() const;
+  float asFloat() const;
+  double asDouble() const;
+  bool asBool() const;
+
+  bool isNull() const;
+  bool isBool() const;
+  bool isInt() const;
+  bool isInt64() const;
+  bool isUInt() const;
+  bool isUInt64() const;
+  bool isIntegral() const;
+  bool isDouble() const;
+  bool isNumeric() const;
+  bool isString() const;
+  bool isArray() const;
+  bool isObject() const;
+
+  /// The `as<T>` and `is<T>` member function templates and specializations.
+  template <typename T> T as() const JSONCPP_TEMPLATE_DELETE;
+  template <typename T> bool is() const JSONCPP_TEMPLATE_DELETE;
+
+  bool isConvertibleTo(ValueType other) const;
+
+  /// Number of values in array or object
+  ArrayIndex size() const;
+
+  /// \brief Return true if empty array, empty object, or null;
+  /// otherwise, false.
+  bool empty() const;
+
+  /// Return !isNull()
+  explicit operator bool() const;
+
+  /// Remove all object members and array elements.
+  /// \pre type() is arrayValue, objectValue, or nullValue
+  /// \post type() is unchanged
+  void clear();
+
+  /// Resize the array to newSize elements.
+  /// New elements are initialized to null.
+  /// May only be called on nullValue or arrayValue.
+  /// \pre type() is arrayValue or nullValue
+  /// \post type() is arrayValue
+  void resize(ArrayIndex newSize);
+
+  ///@{
+  /// Access an array element (zero based index). If the array contains less
+  /// than index element, then null value are inserted in the array so that
+  /// its size is index+1.
+  /// (You may need to say 'value[0u]' to get your compiler to distinguish
+  /// this from the operator[] which takes a string.)
+  Value& operator[](ArrayIndex index);
+  Value& operator[](int index);
+  ///@}
+
+  ///@{
+  /// Access an array element (zero based index).
+  /// (You may need to say 'value[0u]' to get your compiler to distinguish
+  /// this from the operator[] which takes a string.)
+  const Value& operator[](ArrayIndex index) const;
+  const Value& operator[](int index) const;
+  ///@}
+
+  /// If the array contains at least index+1 elements, returns the element
+  /// value, otherwise returns defaultValue.
+  Value get(ArrayIndex index, const Value& defaultValue) const;
+  /// Return true if index < size().
+  bool isValidIndex(ArrayIndex index) const;
+  /// \brief Append value to array at the end.
+  ///
+  /// Equivalent to jsonvalue[jsonvalue.size()] = value;
+  Value& append(const Value& value);
+  Value& append(Value&& value);
+
+  /// \brief Insert value in array at specific index
+  bool insert(ArrayIndex index, const Value& newValue);
+  bool insert(ArrayIndex index, Value&& newValue);
+
+  /// Access an object value by name, create a null member if it does not exist.
+  /// \note Because of our implementation, keys are limited to 2^30 -1 chars.
+  /// Exceeding that will cause an exception.
+  Value& operator[](const char* key);
+  /// Access an object value by name, returns null if there is no member with
+  /// that name.
+  const Value& operator[](const char* key) const;
+  /// Access an object value by name, create a null member if it does not exist.
+  /// \param key may contain embedded nulls.
+  Value& operator[](const String& key);
+  /// Access an object value by name, returns null if there is no member with
+  /// that name.
+  /// \param key may contain embedded nulls.
+  const Value& operator[](const String& key) const;
+  /** \brief Access an object value by name, create a null member if it does not
+   * exist.
+   *
+   * If the object has no entry for that name, then the member name used to
+   * store the new entry is not duplicated.
+   * Example of use:
+   *   \code
+   *   Json::Value object;
+   *   static const StaticString code("code");
+   *   object[code] = 1234;
+   *   \endcode
+   */
+  Value& operator[](const StaticString& key);
+  /// Return the member named key if it exist, defaultValue otherwise.
+  /// \note deep copy
+  Value get(const char* key, const Value& defaultValue) const;
+  /// Return the member named key if it exist, defaultValue otherwise.
+  /// \note deep copy
+  /// \note key may contain embedded nulls.
+  Value get(const char* begin, const char* end,
+            const Value& defaultValue) const;
+  /// Return the member named key if it exist, defaultValue otherwise.
+  /// \note deep copy
+  /// \param key may contain embedded nulls.
+  Value get(const String& key, const Value& defaultValue) const;
+  /// Most general and efficient version of isMember()const, get()const,
+  /// and operator[]const
+  /// \note As stated elsewhere, behavior is undefined if (end-begin) >= 2^30
+  Value const* find(char const* begin, char const* end) const;
+  /// Most general and efficient version of object-mutators.
+  /// \note As stated elsewhere, behavior is undefined if (end-begin) >= 2^30
+  /// \return non-zero, but JSON_ASSERT if this is neither object nor nullValue.
+  Value* demand(char const* begin, char const* end);
+  /// \brief Remove and return the named member.
+  ///
+  /// Do nothing if it did not exist.
+  /// \pre type() is objectValue or nullValue
+  /// \post type() is unchanged
+  void removeMember(const char* key);
+  /// Same as removeMember(const char*)
+  /// \param key may contain embedded nulls.
+  void removeMember(const String& key);
+  /// Same as removeMember(const char* begin, const char* end, Value* removed),
+  /// but 'key' is null-terminated.
+  bool removeMember(const char* key, Value* removed);
+  /** \brief Remove the named map member.
+   *
+   *  Update 'removed' iff removed.
+   *  \param key may contain embedded nulls.
+   *  \return true iff removed (no exceptions)
+   */
+  bool removeMember(String const& key, Value* removed);
+  /// Same as removeMember(String const& key, Value* removed)
+  bool removeMember(const char* begin, const char* end, Value* removed);
+  /** \brief Remove the indexed array element.
+   *
+   *  O(n) expensive operations.
+   *  Update 'removed' iff removed.
+   *  \return true if removed (no exceptions)
+   */
+  bool removeIndex(ArrayIndex index, Value* removed);
+
+  /// Return true if the object has a member named key.
+  /// \note 'key' must be null-terminated.
+  bool isMember(const char* key) const;
+  /// Return true if the object has a member named key.
+  /// \param key may contain embedded nulls.
+  bool isMember(const String& key) const;
+  /// Same as isMember(String const& key)const
+  bool isMember(const char* begin, const char* end) const;
+
+  /// \brief Return a list of the member names.
+  ///
+  /// If null, return an empty list.
+  /// \pre type() is objectValue or nullValue
+  /// \post if type() was nullValue, it remains nullValue
+  Members getMemberNames() const;
+
+  /// \deprecated Always pass len.
+  JSONCPP_DEPRECATED("Use setComment(String const&) instead.")
+  void setComment(const char* comment, CommentPlacement placement) {
+    setComment(String(comment, strlen(comment)), placement);
+  }
+  /// Comments must be //... or /* ... */
+  void setComment(const char* comment, size_t len, CommentPlacement placement) {
+    setComment(String(comment, len), placement);
+  }
+  /// Comments must be //... or /* ... */
+  void setComment(String comment, CommentPlacement placement);
+  bool hasComment(CommentPlacement placement) const;
+  /// Include delimiters and embedded newlines.
+  String getComment(CommentPlacement placement) const;
+
+  String toStyledString() const;
+
+  const_iterator begin() const;
+  const_iterator end() const;
+
+  iterator begin();
+  iterator end();
+
+  // Accessors for the [start, limit) range of bytes within the JSON text from
+  // which this value was parsed, if any.
+  void setOffsetStart(ptrdiff_t start);
+  void setOffsetLimit(ptrdiff_t limit);
+  ptrdiff_t getOffsetStart() const;
+  ptrdiff_t getOffsetLimit() const;
+
+private:
+  void setType(ValueType v) {
+    bits_.value_type_ = static_cast<unsigned char>(v);
+  }
+  bool isAllocated() const { return bits_.allocated_; }
+  void setIsAllocated(bool v) { bits_.allocated_ = v; }
+
+  void initBasic(ValueType type, bool allocated = false);
+  void dupPayload(const Value& other);
+  void releasePayload();
+  void dupMeta(const Value& other);
+
+  Value& resolveReference(const char* key);
+  Value& resolveReference(const char* key, const char* end);
+
+  // struct MemberNamesTransform
+  //{
+  //   typedef const char *result_type;
+  //   const char *operator()( const CZString &name ) const
+  //   {
+  //      return name.c_str();
+  //   }
+  //};
+
+  union ValueHolder {
+    LargestInt int_;
+    LargestUInt uint_;
+    double real_;
+    bool bool_;
+    char* string_; // if allocated_, ptr to { unsigned, char[] }.
+    ObjectValues* map_;
+  } value_;
+
+  struct {
+    // Really a ValueType, but types should agree for bitfield packing.
+    unsigned int value_type_ : 8;
+    // Unless allocated_, string_ must be null-terminated.
+    unsigned int allocated_ : 1;
+  } bits_;
+
+  class Comments {
+  public:
+    Comments() = default;
+    Comments(const Comments& that);
+    Comments(Comments&& that) noexcept;
+    Comments& operator=(const Comments& that);
+    Comments& operator=(Comments&& that) noexcept;
+    bool has(CommentPlacement slot) const;
+    String get(CommentPlacement slot) const;
+    void set(CommentPlacement slot, String comment);
+
+  private:
+    using Array = std::array<String, numberOfCommentPlacement>;
+    std::unique_ptr<Array> ptr_;
+  };
+  Comments comments_;
+
+  // [start, limit) byte offsets in the source JSON text from which this Value
+  // was extracted.
+  ptrdiff_t start_;
+  ptrdiff_t limit_;
+};
+
+template <> inline bool Value::as<bool>() const { return asBool(); }
+template <> inline bool Value::is<bool>() const { return isBool(); }
+
+template <> inline Int Value::as<Int>() const { return asInt(); }
+template <> inline bool Value::is<Int>() const { return isInt(); }
+
+template <> inline UInt Value::as<UInt>() const { return asUInt(); }
+template <> inline bool Value::is<UInt>() const { return isUInt(); }
+
+#if defined(JSON_HAS_INT64)
+template <> inline Int64 Value::as<Int64>() const { return asInt64(); }
+template <> inline bool Value::is<Int64>() const { return isInt64(); }
+
+template <> inline UInt64 Value::as<UInt64>() const { return asUInt64(); }
+template <> inline bool Value::is<UInt64>() const { return isUInt64(); }
+#endif
+
+template <> inline double Value::as<double>() const { return asDouble(); }
+template <> inline bool Value::is<double>() const { return isDouble(); }
+
+template <> inline String Value::as<String>() const { return asString(); }
+template <> inline bool Value::is<String>() const { return isString(); }
+
+/// These `as` specializations are type conversions, and do not have a
+/// corresponding `is`.
+template <> inline float Value::as<float>() const { return asFloat(); }
+template <> inline const char* Value::as<const char*>() const {
+  return asCString();
+}
+
+/** \brief Experimental and untested: represents an element of the "path" to
+ * access a node.
+ */
+class JSON_API PathArgument {
+public:
+  friend class Path;
+
+  PathArgument();
+  PathArgument(ArrayIndex index);
+  PathArgument(const char* key);
+  PathArgument(String key);
+
+private:
+  enum Kind { kindNone = 0, kindIndex, kindKey };
+  String key_;
+  ArrayIndex index_{};
+  Kind kind_{kindNone};
+};
+
+/** \brief Experimental and untested: represents a "path" to access a node.
+ *
+ * Syntax:
+ * - "." => root node
+ * - ".[n]" => elements at index 'n' of root node (an array value)
+ * - ".name" => member named 'name' of root node (an object value)
+ * - ".name1.name2.name3"
+ * - ".[0][1][2].name1[3]"
+ * - ".%" => member name is provided as parameter
+ * - ".[%]" => index is provided as parameter
+ */
+class JSON_API Path {
+public:
+  Path(const String& path, const PathArgument& a1 = PathArgument(),
+       const PathArgument& a2 = PathArgument(),
+       const PathArgument& a3 = PathArgument(),
+       const PathArgument& a4 = PathArgument(),
+       const PathArgument& a5 = PathArgument());
+
+  const Value& resolve(const Value& root) const;
+  Value resolve(const Value& root, const Value& defaultValue) const;
+  /// Creates the "path" to access the specified node and returns a reference on
+  /// the node.
+  Value& make(Value& root) const;
+
+private:
+  using InArgs = std::vector<const PathArgument*>;
+  using Args = std::vector<PathArgument>;
+
+  void makePath(const String& path, const InArgs& in);
+  void addPathInArg(const String& path, const InArgs& in,
+                    InArgs::const_iterator& itInArg, PathArgument::Kind kind);
+  static void invalidPath(const String& path, int location);
+
+  Args args_;
+};
+
+/** \brief base class for Value iterators.
+ *
+ */
+class JSON_API ValueIteratorBase {
+public:
+  using iterator_category = std::bidirectional_iterator_tag;
+  using size_t = unsigned int;
+  using difference_type = int;
+  using SelfType = ValueIteratorBase;
+
+  bool operator==(const SelfType& other) const { return isEqual(other); }
+
+  bool operator!=(const SelfType& other) const { return !isEqual(other); }
+
+  difference_type operator-(const SelfType& other) const {
+    return other.computeDistance(*this);
+  }
+
+  /// Return either the index or the member name of the referenced value as a
+  /// Value.
+  Value key() const;
+
+  /// Return the index of the referenced Value, or -1 if it is not an
+  /// arrayValue.
+  UInt index() const;
+
+  /// Return the member name of the referenced Value, or "" if it is not an
+  /// objectValue.
+  /// \note Avoid `c_str()` on result, as embedded zeroes are possible.
+  String name() const;
+
+  /// Return the member name of the referenced Value. "" if it is not an
+  /// objectValue.
+  /// \deprecated This cannot be used for UTF-8 strings, since there can be
+  /// embedded nulls.
+  JSONCPP_DEPRECATED("Use `key = name();` instead.")
+  char const* memberName() const;
+  /// Return the member name of the referenced Value, or NULL if it is not an
+  /// objectValue.
+  /// \note Better version than memberName(). Allows embedded nulls.
+  char const* memberName(char const** end) const;
+
+protected:
+  /*! Internal utility functions to assist with implementing
+   *   other iterator functions. The const and non-const versions
+   *   of the "deref" protected methods expose the protected
+   *   current_ member variable in a way that can often be
+   *   optimized away by the compiler.
+   */
+  const Value& deref() const;
+  Value& deref();
+
+  void increment();
+
+  void decrement();
+
+  difference_type computeDistance(const SelfType& other) const;
+
+  bool isEqual(const SelfType& other) const;
+
+  void copy(const SelfType& other);
+
+private:
+  Value::ObjectValues::iterator current_;
+  // Indicates that iterator is for a null value.
+  bool isNull_{true};
+
+public:
+  // For some reason, BORLAND needs these at the end, rather
+  // than earlier. No idea why.
+  ValueIteratorBase();
+  explicit ValueIteratorBase(const Value::ObjectValues::iterator& current);
+};
+
+/** \brief const iterator for object and array value.
+ *
+ */
+class JSON_API ValueConstIterator : public ValueIteratorBase {
+  friend class Value;
+
+public:
+  using value_type = const Value;
+  // typedef unsigned int size_t;
+  // typedef int difference_type;
+  using reference = const Value&;
+  using pointer = const Value*;
+  using SelfType = ValueConstIterator;
+
+  ValueConstIterator();
+  ValueConstIterator(ValueIterator const& other);
+
+private:
+  /*! \internal Use by Value to create an iterator.
+   */
+  explicit ValueConstIterator(const Value::ObjectValues::iterator& current);
+
+public:
+  SelfType& operator=(const ValueIteratorBase& other);
+
+  SelfType operator++(int) {
+    SelfType temp(*this);
+    ++*this;
+    return temp;
+  }
+
+  SelfType operator--(int) {
+    SelfType temp(*this);
+    --*this;
+    return temp;
+  }
+
+  SelfType& operator--() {
+    decrement();
+    return *this;
+  }
+
+  SelfType& operator++() {
+    increment();
+    return *this;
+  }
+
+  reference operator*() const { return deref(); }
+
+  pointer operator->() const { return &deref(); }
+};
+
+/** \brief Iterator for object and array value.
+ */
+class JSON_API ValueIterator : public ValueIteratorBase {
+  friend class Value;
+
+public:
+  using value_type = Value;
+  using size_t = unsigned int;
+  using difference_type = int;
+  using reference = Value&;
+  using pointer = Value*;
+  using SelfType = ValueIterator;
+
+  ValueIterator();
+  explicit ValueIterator(const ValueConstIterator& other);
+  ValueIterator(const ValueIterator& other);
+
+private:
+  /*! \internal Use by Value to create an iterator.
+   */
+  explicit ValueIterator(const Value::ObjectValues::iterator& current);
+
+public:
+  SelfType& operator=(const SelfType& other);
+
+  SelfType operator++(int) {
+    SelfType temp(*this);
+    ++*this;
+    return temp;
+  }
+
+  SelfType operator--(int) {
+    SelfType temp(*this);
+    --*this;
+    return temp;
+  }
+
+  SelfType& operator--() {
+    decrement();
+    return *this;
+  }
+
+  SelfType& operator++() {
+    increment();
+    return *this;
+  }
+
+  /*! The return value of non-const iterators can be
+   *  changed, so the these functions are not const
+   *  because the returned references/pointers can be used
+   *  to change state of the base class.
+   */
+  reference operator*() const { return const_cast<reference>(deref()); }
+  pointer operator->() const { return const_cast<pointer>(&deref()); }
+};
+
+inline void swap(Value& a, Value& b) { a.swap(b); }
+
+} // namespace Json
+
+#pragma pack(pop)
+
+#if defined(JSONCPP_DISABLE_DLL_INTERFACE_WARNING)
+#pragma warning(pop)
+#endif // if defined(JSONCPP_DISABLE_DLL_INTERFACE_WARNING)
+
+#endif // JSON_H_INCLUDED
+
+// //////////////////////////////////////////////////////////////////////
+// End of content of file: include/json/value.h
+// //////////////////////////////////////////////////////////////////////
+
+
+
+
+
+
+// //////////////////////////////////////////////////////////////////////
+// Beginning of content of file: include/json/reader.h
+// //////////////////////////////////////////////////////////////////////
+
+// Copyright 2007-2010 Baptiste Lepilleur and The JsonCpp Authors
+// Distributed under MIT license, or public domain if desired and
+// recognized in your jurisdiction.
+// See file LICENSE for detail or copy at http://jsoncpp.sourceforge.net/LICENSE
+
+#ifndef JSON_READER_H_INCLUDED
+#define JSON_READER_H_INCLUDED
+
+#if !defined(JSON_IS_AMALGAMATION)
+#include "json_features.h"
+#include "value.h"
+#endif // if !defined(JSON_IS_AMALGAMATION)
+#include <deque>
+#include <iosfwd>
+#include <istream>
+#include <stack>
+#include <string>
+
+// Disable warning C4251: <data member>: <type> needs to have dll-interface to
+// be used by...
+#if defined(JSONCPP_DISABLE_DLL_INTERFACE_WARNING)
+#pragma warning(push)
+#pragma warning(disable : 4251)
+#endif // if defined(JSONCPP_DISABLE_DLL_INTERFACE_WARNING)
+
+#pragma pack(push)
+#pragma pack()
+
+namespace Json {
+
+/** \brief Unserialize a <a HREF="http://www.json.org">JSON</a> document into a
+ * Value.
+ *
+ * \deprecated Use CharReader and CharReaderBuilder.
+ */
+
+class JSON_API Reader {
+public:
+  using Char = char;
+  using Location = const Char*;
+
+  /** \brief An error tagged with where in the JSON text it was encountered.
+   *
+   * The offsets give the [start, limit) range of bytes within the text. Note
+   * that this is bytes, not codepoints.
+   */
+  struct StructuredError {
+    ptrdiff_t offset_start;
+    ptrdiff_t offset_limit;
+    String message;
+  };
+
+  /** \brief Constructs a Reader allowing all features for parsing.
+    * \deprecated Use CharReader and CharReaderBuilder.
+   */
+  Reader();
+
+  /** \brief Constructs a Reader allowing the specified feature set for parsing.
+    * \deprecated Use CharReader and CharReaderBuilder.
+   */
+  Reader(const Features& features);
+
+  /** \brief Read a Value from a <a HREF="http://www.json.org">JSON</a>
+   * document.
+   *
+   * \param      document        UTF-8 encoded string containing the document
+   *                             to read.
+   * \param[out] root            Contains the root value of the document if it
+   *                             was successfully parsed.
+   * \param      collectComments \c true to collect comment and allow writing
+   *                             them back during serialization, \c false to
+   *                             discard comments.  This parameter is ignored
+   *                             if Features::allowComments_ is \c false.
+   * \return \c true if the document was successfully parsed, \c false if an
+   * error occurred.
+   */
+  bool parse(const std::string& document, Value& root,
+             bool collectComments = true);
+
+  /** \brief Read a Value from a <a HREF="http://www.json.org">JSON</a>
+   * document.
+   *
+   * \param      beginDoc        Pointer on the beginning of the UTF-8 encoded
+   *                             string of the document to read.
+   * \param      endDoc          Pointer on the end of the UTF-8 encoded string
+   *                             of the document to read.  Must be >= beginDoc.
+   * \param[out] root            Contains the root value of the document if it
+   *                             was successfully parsed.
+   * \param      collectComments \c true to collect comment and allow writing
+   *                             them back during serialization, \c false to
+   *                             discard comments.  This parameter is ignored
+   *                             if Features::allowComments_ is \c false.
+   * \return \c true if the document was successfully parsed, \c false if an
+   * error occurred.
+   */
+  bool parse(const char* beginDoc, const char* endDoc, Value& root,
+             bool collectComments = true);
+
+  /// \brief Parse from input stream.
+  /// \see Json::operator>>(std::istream&, Json::Value&).
+  bool parse(IStream& is, Value& root, bool collectComments = true);
+
+  /** \brief Returns a user friendly string that list errors in the parsed
+   * document.
+   *
+   * \return Formatted error message with the list of errors with their
+   * location in the parsed document. An empty string is returned if no error
+   * occurred during parsing.
+   * \deprecated Use getFormattedErrorMessages() instead (typo fix).
+   */
+  JSONCPP_DEPRECATED("Use getFormattedErrorMessages() instead.")
+  String getFormatedErrorMessages() const;
+
+  /** \brief Returns a user friendly string that list errors in the parsed
+   * document.
+   *
+   * \return Formatted error message with the list of errors with their
+   * location in the parsed document. An empty string is returned if no error
+   * occurred during parsing.
+   */
+  String getFormattedErrorMessages() const;
+
+  /** \brief Returns a vector of structured errors encountered while parsing.
+   *
+   * \return A (possibly empty) vector of StructuredError objects. Currently
+   * only one error can be returned, but the caller should tolerate multiple
+   * errors.  This can occur if the parser recovers from a non-fatal parse
+   * error and then encounters additional errors.
+   */
+  std::vector<StructuredError> getStructuredErrors() const;
+
+  /** \brief Add a semantic error message.
+   *
+   * \param value   JSON Value location associated with the error
+   * \param message The error message.
+   * \return \c true if the error was successfully added, \c false if the Value
+   * offset exceeds the document size.
+   */
+  bool pushError(const Value& value, const String& message);
+
+  /** \brief Add a semantic error message with extra context.
+   *
+   * \param value   JSON Value location associated with the error
+   * \param message The error message.
+   * \param extra   Additional JSON Value location to contextualize the error
+   * \return \c true if the error was successfully added, \c false if either
+   * Value offset exceeds the document size.
+   */
+  bool pushError(const Value& value, const String& message, const Value& extra);
+
+  /** \brief Return whether there are any errors.
+   *
+   * \return \c true if there are no errors to report \c false if errors have
+   * occurred.
+   */
+  bool good() const;
+
+private:
+  enum TokenType {
+    tokenEndOfStream = 0,
+    tokenObjectBegin,
+    tokenObjectEnd,
+    tokenArrayBegin,
+    tokenArrayEnd,
+    tokenString,
+    tokenNumber,
+    tokenTrue,
+    tokenFalse,
+    tokenNull,
+    tokenArraySeparator,
+    tokenMemberSeparator,
+    tokenComment,
+    tokenError
+  };
+
+  class Token {
+  public:
+    TokenType type_;
+    Location start_;
+    Location end_;
+  };
+
+  class ErrorInfo {
+  public:
+    Token token_;
+    String message_;
+    Location extra_;
+  };
+
+  using Errors = std::deque<ErrorInfo>;
+
+  bool readToken(Token& token);
+  void skipSpaces();
+  bool match(const Char* pattern, int patternLength);
+  bool readComment();
+  bool readCStyleComment();
+  bool readCppStyleComment();
+  bool readString();
+  void readNumber();
+  bool readValue();
+  bool readObject(Token& token);
+  bool readArray(Token& token);
+  bool decodeNumber(Token& token);
+  bool decodeNumber(Token& token, Value& decoded);
+  bool decodeString(Token& token);
+  bool decodeString(Token& token, String& decoded);
+  bool decodeDouble(Token& token);
+  bool decodeDouble(Token& token, Value& decoded);
+  bool decodeUnicodeCodePoint(Token& token, Location& current, Location end,
+                              unsigned int& unicode);
+  bool decodeUnicodeEscapeSequence(Token& token, Location& current,
+                                   Location end, unsigned int& unicode);
+  bool addError(const String& message, Token& token, Location extra = nullptr);
+  bool recoverFromError(TokenType skipUntilToken);
+  bool addErrorAndRecover(const String& message, Token& token,
+                          TokenType skipUntilToken);
+  void skipUntilSpace();
+  Value& currentValue();
+  Char getNextChar();
+  void getLocationLineAndColumn(Location location, int& line,
+                                int& column) const;
+  String getLocationLineAndColumn(Location location) const;
+  void addComment(Location begin, Location end, CommentPlacement placement);
+  void skipCommentTokens(Token& token);
+
+  static bool containsNewLine(Location begin, Location end);
+  static String normalizeEOL(Location begin, Location end);
+
+  using Nodes = std::stack<Value*>;
+  Nodes nodes_;
+  Errors errors_;
+  String document_;
+  Location begin_{};
+  Location end_{};
+  Location current_{};
+  Location lastValueEnd_{};
+  Value* lastValue_{};
+  String commentsBefore_;
+  Features features_;
+  bool collectComments_{};
+}; // Reader
+
+/** Interface for reading JSON from a char array.
+ */
+class JSON_API CharReader {
+public:
+  virtual ~CharReader() = default;
+  /** \brief Read a Value from a <a HREF="http://www.json.org">JSON</a>
+   * document. The document must be a UTF-8 encoded string containing the
+   * document to read.
+   *
+   * \param      beginDoc Pointer on the beginning of the UTF-8 encoded string
+   *                      of the document to read.
+   * \param      endDoc   Pointer on the end of the UTF-8 encoded string of the
+   *                      document to read. Must be >= beginDoc.
+   * \param[out] root     Contains the root value of the document if it was
+   *                      successfully parsed.
+   * \param[out] errs     Formatted error messages (if not NULL) a user
+   *                      friendly string that lists errors in the parsed
+   *                      document.
+   * \return \c true if the document was successfully parsed, \c false if an
+   * error occurred.
+   */
+  virtual bool parse(char const* beginDoc, char const* endDoc, Value* root,
+                     String* errs) = 0;
+
+  class JSON_API Factory {
+  public:
+    virtual ~Factory() = default;
+    /** \brief Allocate a CharReader via operator new().
+     * \throw std::exception if something goes wrong (e.g. invalid settings)
+     */
+    virtual CharReader* newCharReader() const = 0;
+  }; // Factory
+};   // CharReader
+
+/** \brief Build a CharReader implementation.
+ *
+ * Usage:
+ *   \code
+ *   using namespace Json;
+ *   CharReaderBuilder builder;
+ *   builder["collectComments"] = false;
+ *   Value value;
+ *   String errs;
+ *   bool ok = parseFromStream(builder, std::cin, &value, &errs);
+ *   \endcode
+ */
+class JSON_API CharReaderBuilder : public CharReader::Factory {
+public:
+  // Note: We use a Json::Value so that we can add data-members to this class
+  // without a major version bump.
+  /** Configuration of this builder.
+   * These are case-sensitive.
+   * Available settings (case-sensitive):
+   * - `"collectComments": false or true`
+   *   - true to collect comment and allow writing them back during
+   *     serialization, false to discard comments.  This parameter is ignored
+   *     if allowComments is false.
+   * - `"allowComments": false or true`
+   *   - true if comments are allowed.
+   * - `"allowTrailingCommas": false or true`
+   *   - true if trailing commas in objects and arrays are allowed.
+   * - `"strictRoot": false or true`
+   *   - true if root must be either an array or an object value
+   * - `"allowDroppedNullPlaceholders": false or true`
+   *   - true if dropped null placeholders are allowed. (See
+   *     StreamWriterBuilder.)
+   * - `"allowNumericKeys": false or true`
+   *   - true if numeric object keys are allowed.
+   * - `"allowSingleQuotes": false or true`
+   *   - true if '' are allowed for strings (both keys and values)
+   * - `"stackLimit": integer`
+   *   - Exceeding stackLimit (recursive depth of `readValue()`) will cause an
+   *     exception.
+   *   - This is a security issue (seg-faults caused by deeply nested JSON), so
+   *     the default is low.
+   * - `"failIfExtra": false or true`
+   *   - If true, `parse()` returns false when extra non-whitespace trails the
+   *     JSON value in the input string.
+   * - `"rejectDupKeys": false or true`
+   *   - If true, `parse()` returns false when a key is duplicated within an
+   *     object.
+   * - `"allowSpecialFloats": false or true`
+   *   - If true, special float values (NaNs and infinities) are allowed and
+   *     their values are lossfree restorable.
+   * - `"skipBom": false or true`
+   *   - If true, if the input starts with the Unicode byte order mark (BOM),
+   *     it is skipped.
+   *
+   * You can examine 'settings_` yourself to see the defaults. You can also
+   * write and read them just like any JSON Value.
+   * \sa setDefaults()
+   */
+  Json::Value settings_;
+
+  CharReaderBuilder();
+  ~CharReaderBuilder() override;
+
+  CharReader* newCharReader() const override;
+
+  /** \return true if 'settings' are legal and consistent;
+   *   otherwise, indicate bad settings via 'invalid'.
+   */
+  bool validate(Json::Value* invalid) const;
+
+  /** A simple way to update a specific setting.
+   */
+  Value& operator[](const String& key);
+
+  /** Called by ctor, but you can use this to reset settings_.
+   * \pre 'settings' != NULL (but Json::null is fine)
+   * \remark Defaults:
+   * \snippet src/lib_json/json_reader.cpp CharReaderBuilderDefaults
+   */
+  static void setDefaults(Json::Value* settings);
+  /** Same as old Features::strictMode().
+   * \pre 'settings' != NULL (but Json::null is fine)
+   * \remark Defaults:
+   * \snippet src/lib_json/json_reader.cpp CharReaderBuilderStrictMode
+   */
+  static void strictMode(Json::Value* settings);
+};
+
+/** Consume entire stream and use its begin/end.
+ * Someday we might have a real StreamReader, but for now this
+ * is convenient.
+ */
+bool JSON_API parseFromStream(CharReader::Factory const&, IStream&, Value* root,
+                              String* errs);
+
+/** \brief Read from 'sin' into 'root'.
+ *
+ * Always keep comments from the input JSON.
+ *
+ * This can be used to read a file into a particular sub-object.
+ * For example:
+ *   \code
+ *   Json::Value root;
+ *   cin >> root["dir"]["file"];
+ *   cout << root;
+ *   \endcode
+ * Result:
+ * \verbatim
+ * {
+ * "dir": {
+ *    "file": {
+ *    // The input stream JSON would be nested here.
+ *    }
+ * }
+ * }
+ * \endverbatim
+ * \throw std::exception on parse error.
+ * \see Json::operator<<()
+ */
+JSON_API IStream& operator>>(IStream&, Value&);
+
+} // namespace Json
+
+#pragma pack(pop)
+
+#if defined(JSONCPP_DISABLE_DLL_INTERFACE_WARNING)
+#pragma warning(pop)
+#endif // if defined(JSONCPP_DISABLE_DLL_INTERFACE_WARNING)
+
+#endif // JSON_READER_H_INCLUDED
+
+// //////////////////////////////////////////////////////////////////////
+// End of content of file: include/json/reader.h
+// //////////////////////////////////////////////////////////////////////
+
+
+
+
+
+
+// //////////////////////////////////////////////////////////////////////
+// Beginning of content of file: include/json/writer.h
+// //////////////////////////////////////////////////////////////////////
+
+// Copyright 2007-2010 Baptiste Lepilleur and The JsonCpp Authors
+// Distributed under MIT license, or public domain if desired and
+// recognized in your jurisdiction.
+// See file LICENSE for detail or copy at http://jsoncpp.sourceforge.net/LICENSE
+
+#ifndef JSON_WRITER_H_INCLUDED
+#define JSON_WRITER_H_INCLUDED
+
+#if !defined(JSON_IS_AMALGAMATION)
+#include "value.h"
+#endif // if !defined(JSON_IS_AMALGAMATION)
+#include <ostream>
+#include <string>
+#include <vector>
+
+// Disable warning C4251: <data member>: <type> needs to have dll-interface to
+// be used by...
+#if defined(JSONCPP_DISABLE_DLL_INTERFACE_WARNING) && defined(_MSC_VER)
+#pragma warning(push)
+#pragma warning(disable : 4251)
+#endif // if defined(JSONCPP_DISABLE_DLL_INTERFACE_WARNING)
+
+#pragma pack(push)
+#pragma pack()
+
+namespace Json {
+
+class Value;
+
+/**
+ *
+ * Usage:
+ *  \code
+ *  using namespace Json;
+ *  void writeToStdout(StreamWriter::Factory const& factory, Value const& value)
+ * { std::unique_ptr<StreamWriter> const writer( factory.newStreamWriter());
+ *    writer->write(value, &std::cout);
+ *    std::cout << std::endl;  // add lf and flush
+ *  }
+ *  \endcode
+ */
+class JSON_API StreamWriter {
+protected:
+  OStream* sout_; // not owned; will not delete
+public:
+  StreamWriter();
+  virtual ~StreamWriter();
+  /** Write Value into document as configured in sub-class.
+   *   Do not take ownership of sout, but maintain a reference during function.
+   *   \pre sout != NULL
+   *   \return zero on success (For now, we always return zero, so check the
+   *   stream instead.) \throw std::exception possibly, depending on
+   * configuration
+   */
+  virtual int write(Value const& root, OStream* sout) = 0;
+
+  /** \brief A simple abstract factory.
+   */
+  class JSON_API Factory {
+  public:
+    virtual ~Factory();
+    /** \brief Allocate a CharReader via operator new().
+     * \throw std::exception if something goes wrong (e.g. invalid settings)
+     */
+    virtual StreamWriter* newStreamWriter() const = 0;
+  }; // Factory
+};   // StreamWriter
+
+/** \brief Write into stringstream, then return string, for convenience.
+ * A StreamWriter will be created from the factory, used, and then deleted.
+ */
+String JSON_API writeString(StreamWriter::Factory const& factory,
+                            Value const& root);
+
+/** \brief Build a StreamWriter implementation.
+
+* Usage:
+*   \code
+*   using namespace Json;
+*   Value value = ...;
+*   StreamWriterBuilder builder;
+*   builder["commentStyle"] = "None";
+*   builder["indentation"] = "   ";  // or whatever you like
+*   std::unique_ptr<Json::StreamWriter> writer(
+*      builder.newStreamWriter());
+*   writer->write(value, &std::cout);
+*   std::cout << std::endl;  // add lf and flush
+*   \endcode
+*/
+class JSON_API StreamWriterBuilder : public StreamWriter::Factory {
+public:
+  // Note: We use a Json::Value so that we can add data-members to this class
+  // without a major version bump.
+  /** Configuration of this builder.
+   *  Available settings (case-sensitive):
+   *  - "commentStyle": "None" or "All"
+   *  - "indentation":  "<anything>".
+   *  - Setting this to an empty string also omits newline characters.
+   *  - "enableYAMLCompatibility": false or true
+   *  - slightly change the whitespace around colons
+   *  - "dropNullPlaceholders": false or true
+   *  - Drop the "null" string from the writer's output for nullValues.
+   *    Strictly speaking, this is not valid JSON. But when the output is being
+   *    fed to a browser's JavaScript, it makes for smaller output and the
+   *    browser can handle the output just fine.
+   *  - "useSpecialFloats": false or true
+   *  - If true, outputs non-finite floating point values in the following way:
+   *    NaN values as "NaN", positive infinity as "Infinity", and negative
+   *  infinity as "-Infinity".
+   *  - "precision": int
+   *  - Number of precision digits for formatting of real values.
+   *  - "precisionType": "significant"(default) or "decimal"
+   *  - Type of precision for formatting of real values.
+   *  - "emitUTF8": false or true
+   *  - If true, outputs raw UTF8 strings instead of escaping them.
+
+   *  You can examine 'settings_` yourself
+   *  to see the defaults. You can also write and read them just like any
+   *  JSON Value.
+   *  \sa setDefaults()
+   */
+  Json::Value settings_;
+
+  StreamWriterBuilder();
+  ~StreamWriterBuilder() override;
+
+  /**
+   * \throw std::exception if something goes wrong (e.g. invalid settings)
+   */
+  StreamWriter* newStreamWriter() const override;
+
+  /** \return true if 'settings' are legal and consistent;
+   *   otherwise, indicate bad settings via 'invalid'.
+   */
+  bool validate(Json::Value* invalid) const;
+  /** A simple way to update a specific setting.
+   */
+  Value& operator[](const String& key);
+
+  /** Called by ctor, but you can use this to reset settings_.
+   * \pre 'settings' != NULL (but Json::null is fine)
+   * \remark Defaults:
+   * \snippet src/lib_json/json_writer.cpp StreamWriterBuilderDefaults
+   */
+  static void setDefaults(Json::Value* settings);
+};
+
+/** \brief Abstract class for writers.
+ * \deprecated Use StreamWriter. (And really, this is an implementation detail.)
+ */
+class JSON_API Writer {
+public:
+  virtual ~Writer();
+
+  virtual String write(const Value& root) = 0;
+};
+
+/** \brief Outputs a Value in <a HREF="http://www.json.org">JSON</a> format
+ *without formatting (not human friendly).
+ *
+ * The JSON document is written in a single line. It is not intended for 'human'
+ *consumption,
+ * but may be useful to support feature such as RPC where bandwidth is limited.
+ * \sa Reader, Value
+ * \deprecated Use StreamWriterBuilder.
+ */
+#if defined(_MSC_VER)
+#pragma warning(push)
+#pragma warning(disable : 4996) // Deriving from deprecated class
+#endif
+class JSON_API FastWriter
+    : public Writer {
+public:
+  FastWriter();
+  ~FastWriter() override = default;
+
+  void enableYAMLCompatibility();
+
+  /** \brief Drop the "null" string from the writer's output for nullValues.
+   * Strictly speaking, this is not valid JSON. But when the output is being
+   * fed to a browser's JavaScript, it makes for smaller output and the
+   * browser can handle the output just fine.
+   */
+  void dropNullPlaceholders();
+
+  void omitEndingLineFeed();
+
+public: // overridden from Writer
+  String write(const Value& root) override;
+
+private:
+  void writeValue(const Value& value);
+
+  String document_;
+  bool yamlCompatibilityEnabled_{false};
+  bool dropNullPlaceholders_{false};
+  bool omitEndingLineFeed_{false};
+};
+#if defined(_MSC_VER)
+#pragma warning(pop)
+#endif
+
+/** \brief Writes a Value in <a HREF="http://www.json.org">JSON</a> format in a
+ *human friendly way.
+ *
+ * The rules for line break and indent are as follow:
+ * - Object value:
+ *     - if empty then print {} without indent and line break
+ *     - if not empty the print '{', line break & indent, print one value per
+ *line
+ *       and then unindent and line break and print '}'.
+ * - Array value:
+ *     - if empty then print [] without indent and line break
+ *     - if the array contains no object value, empty array or some other value
+ *types,
+ *       and all the values fit on one lines, then print the array on a single
+ *line.
+ *     - otherwise, it the values do not fit on one line, or the array contains
+ *       object or non empty array, then print one value per line.
+ *
+ * If the Value have comments then they are outputted according to their
+ *#CommentPlacement.
+ *
+ * \sa Reader, Value, Value::setComment()
+ * \deprecated Use StreamWriterBuilder.
+ */
+#if defined(_MSC_VER)
+#pragma warning(push)
+#pragma warning(disable : 4996) // Deriving from deprecated class
+#endif
+class JSON_API
+    StyledWriter : public Writer {
+public:
+  StyledWriter();
+  ~StyledWriter() override = default;
+
+public: // overridden from Writer
+  /** \brief Serialize a Value in <a HREF="http://www.json.org">JSON</a> format.
+   * \param root Value to serialize.
+   * \return String containing the JSON document that represents the root value.
+   */
+  String write(const Value& root) override;
+
+private:
+  void writeValue(const Value& value);
+  void writeArrayValue(const Value& value);
+  bool isMultilineArray(const Value& value);
+  void pushValue(const String& value);
+  void writeIndent();
+  void writeWithIndent(const String& value);
+  void indent();
+  void unindent();
+  void writeCommentBeforeValue(const Value& root);
+  void writeCommentAfterValueOnSameLine(const Value& root);
+  static bool hasCommentForValue(const Value& value);
+  static String normalizeEOL(const String& text);
+
+  using ChildValues = std::vector<String>;
+
+  ChildValues childValues_;
+  String document_;
+  String indentString_;
+  unsigned int rightMargin_{74};
+  unsigned int indentSize_{3};
+  bool addChildValues_{false};
+};
+#if defined(_MSC_VER)
+#pragma warning(pop)
+#endif
+
+/** \brief Writes a Value in <a HREF="http://www.json.org">JSON</a> format in a
+ human friendly way,
+     to a stream rather than to a string.
+ *
+ * The rules for line break and indent are as follow:
+ * - Object value:
+ *     - if empty then print {} without indent and line break
+ *     - if not empty the print '{', line break & indent, print one value per
+ line
+ *       and then unindent and line break and print '}'.
+ * - Array value:
+ *     - if empty then print [] without indent and line break
+ *     - if the array contains no object value, empty array or some other value
+ types,
+ *       and all the values fit on one lines, then print the array on a single
+ line.
+ *     - otherwise, it the values do not fit on one line, or the array contains
+ *       object or non empty array, then print one value per line.
+ *
+ * If the Value have comments then they are outputted according to their
+ #CommentPlacement.
+ *
+ * \sa Reader, Value, Value::setComment()
+ * \deprecated Use StreamWriterBuilder.
+ */
+#if defined(_MSC_VER)
+#pragma warning(push)
+#pragma warning(disable : 4996) // Deriving from deprecated class
+#endif
+class JSON_API
+    StyledStreamWriter {
+public:
+  /**
+   * \param indentation Each level will be indented by this amount extra.
+   */
+  StyledStreamWriter(String indentation = "\t");
+  ~StyledStreamWriter() = default;
+
+public:
+  /** \brief Serialize a Value in <a HREF="http://www.json.org">JSON</a> format.
+   * \param out Stream to write to. (Can be ostringstream, e.g.)
+   * \param root Value to serialize.
+   * \note There is no point in deriving from Writer, since write() should not
+   * return a value.
+   */
+  void write(OStream& out, const Value& root);
+
+private:
+  void writeValue(const Value& value);
+  void writeArrayValue(const Value& value);
+  bool isMultilineArray(const Value& value);
+  void pushValue(const String& value);
+  void writeIndent();
+  void writeWithIndent(const String& value);
+  void indent();
+  void unindent();
+  void writeCommentBeforeValue(const Value& root);
+  void writeCommentAfterValueOnSameLine(const Value& root);
+  static bool hasCommentForValue(const Value& value);
+  static String normalizeEOL(const String& text);
+
+  using ChildValues = std::vector<String>;
+
+  ChildValues childValues_;
+  OStream* document_;
+  String indentString_;
+  unsigned int rightMargin_{74};
+  String indentation_;
+  bool addChildValues_ : 1;
+  bool indented_ : 1;
+};
+#if defined(_MSC_VER)
+#pragma warning(pop)
+#endif
+
+#if defined(JSON_HAS_INT64)
+String JSON_API valueToString(Int value);
+String JSON_API valueToString(UInt value);
+#endif // if defined(JSON_HAS_INT64)
+String JSON_API valueToString(LargestInt value);
+String JSON_API valueToString(LargestUInt value);
+String JSON_API valueToString(
+    double value, unsigned int precision = Value::defaultRealPrecision,
+    PrecisionType precisionType = PrecisionType::significantDigits);
+String JSON_API valueToString(bool value);
+String JSON_API valueToQuotedString(const char* value);
+
+/// \brief Output using the StyledStreamWriter.
+/// \see Json::operator>>()
+JSON_API OStream& operator<<(OStream&, const Value& root);
+
+} // namespace Json
+
+#pragma pack(pop)
+
+#if defined(JSONCPP_DISABLE_DLL_INTERFACE_WARNING)
+#pragma warning(pop)
+#endif // if defined(JSONCPP_DISABLE_DLL_INTERFACE_WARNING)
+
+#endif // JSON_WRITER_H_INCLUDED
+
+// //////////////////////////////////////////////////////////////////////
+// End of content of file: include/json/writer.h
+// //////////////////////////////////////////////////////////////////////
+
+
+
+
+
+
+// //////////////////////////////////////////////////////////////////////
+// Beginning of content of file: include/json/assertions.h
+// //////////////////////////////////////////////////////////////////////
+
+// Copyright 2007-2010 Baptiste Lepilleur and The JsonCpp Authors
+// Distributed under MIT license, or public domain if desired and
+// recognized in your jurisdiction.
+// See file LICENSE for detail or copy at http://jsoncpp.sourceforge.net/LICENSE
+
+#ifndef JSON_ASSERTIONS_H_INCLUDED
+#define JSON_ASSERTIONS_H_INCLUDED
+
+#include <cstdlib>
+#include <sstream>
+
+#if !defined(JSON_IS_AMALGAMATION)
+#include "config.h"
+#endif // if !defined(JSON_IS_AMALGAMATION)
+
+/** It should not be possible for a maliciously designed file to
+ *  cause an abort() or seg-fault, so these macros are used only
+ *  for pre-condition violations and internal logic errors.
+ */
+#if JSON_USE_EXCEPTION
+
+// @todo <= add detail about condition in exception
+#define JSON_ASSERT(condition)                                                 \
+  do {                                                                         \
+    if (!(condition)) {                                                        \
+      Json::throwLogicError("assert json failed");                             \
+    }                                                                          \
+  } while (0)
+
+#define JSON_FAIL_MESSAGE(message)                                             \
+  do {                                                                         \
+    OStringStream oss;                                                         \
+    oss << message;                                                            \
+    Json::throwLogicError(oss.str());                                          \
+    abort();                                                                   \
+  } while (0)
+
+#else // JSON_USE_EXCEPTION
+
+#define JSON_ASSERT(condition) assert(condition)
+
+// The call to assert() will show the failure message in debug builds. In
+// release builds we abort, for a core-dump or debugger.
+#define JSON_FAIL_MESSAGE(message)                                             \
+  {                                                                            \
+    OStringStream oss;                                                         \
+    oss << message;                                                            \
+    assert(false && oss.str().c_str());                                        \
+    abort();                                                                   \
+  }
+
+#endif
+
+#define JSON_ASSERT_MESSAGE(condition, message)                                \
+  do {                                                                         \
+    if (!(condition)) {                                                        \
+      JSON_FAIL_MESSAGE(message);                                              \
+    }                                                                          \
+  } while (0)
+
+#endif // JSON_ASSERTIONS_H_INCLUDED
+
+// //////////////////////////////////////////////////////////////////////
+// End of content of file: include/json/assertions.h
+// //////////////////////////////////////////////////////////////////////
+
+
+
+
+
+#endif //ifndef JSON_AMALGAMATED_H_INCLUDED
diff --git a/third_party/jsoncpp/jsoncpp.cpp b/third_party/jsoncpp/jsoncpp.cpp
new file mode 100644
index 0000000..93f6c86
--- /dev/null
+++ b/third_party/jsoncpp/jsoncpp.cpp
@@ -0,0 +1,5342 @@
+/// Json-cpp amalgamated source (http://jsoncpp.sourceforge.net/).
+/// It is intended to be used with #include "json/json.h"
+
+// //////////////////////////////////////////////////////////////////////
+// Beginning of content of file: LICENSE
+// //////////////////////////////////////////////////////////////////////
+
+/*
+The JsonCpp library's source code, including accompanying documentation,
+tests and demonstration applications, are licensed under the following
+conditions...
+
+Baptiste Lepilleur and The JsonCpp Authors explicitly disclaim copyright in all
+jurisdictions which recognize such a disclaimer. In such jurisdictions,
+this software is released into the Public Domain.
+
+In jurisdictions which do not recognize Public Domain property (e.g. Germany as of
+2010), this software is Copyright (c) 2007-2010 by Baptiste Lepilleur and
+The JsonCpp Authors, and is released under the terms of the MIT License (see below).
+
+In jurisdictions which recognize Public Domain property, the user of this
+software may choose to accept it either as 1) Public Domain, 2) under the
+conditions of the MIT License (see below), or 3) under the terms of dual
+Public Domain/MIT License conditions described here, as they choose.
+
+The MIT License is about as close to Public Domain as a license can get, and is
+described in clear, concise terms at:
+
+   http://en.wikipedia.org/wiki/MIT_License
+
+The full text of the MIT License follows:
+
+========================================================================
+Copyright (c) 2007-2010 Baptiste Lepilleur and The JsonCpp Authors
+
+Permission is hereby granted, free of charge, to any person
+obtaining a copy of this software and associated documentation
+files (the "Software"), to deal in the Software without
+restriction, including without limitation the rights to use, copy,
+modify, merge, publish, distribute, sublicense, and/or sell copies
+of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
+========================================================================
+(END LICENSE TEXT)
+
+The MIT license is compatible with both the GPL and commercial
+software, affording one all of the rights of Public Domain with the
+minor nuisance of being required to keep the above copyright notice
+and license text in the source code. Note also that by accepting the
+Public Domain "license" you can re-license your copy using whatever
+license you like.
+
+*/
+
+// //////////////////////////////////////////////////////////////////////
+// End of content of file: LICENSE
+// //////////////////////////////////////////////////////////////////////
+
+
+
+
+
+
+#include "json/json.h"
+
+#ifndef JSON_IS_AMALGAMATION
+#error "Compile with -I PATH_TO_JSON_DIRECTORY"
+#endif
+
+
+// //////////////////////////////////////////////////////////////////////
+// Beginning of content of file: src/lib_json/json_tool.h
+// //////////////////////////////////////////////////////////////////////
+
+// Copyright 2007-2010 Baptiste Lepilleur and The JsonCpp Authors
+// Distributed under MIT license, or public domain if desired and
+// recognized in your jurisdiction.
+// See file LICENSE for detail or copy at http://jsoncpp.sourceforge.net/LICENSE
+
+#ifndef LIB_JSONCPP_JSON_TOOL_H_INCLUDED
+#define LIB_JSONCPP_JSON_TOOL_H_INCLUDED
+
+#if !defined(JSON_IS_AMALGAMATION)
+#include <json/config.h>
+#endif
+
+// Also support old flag NO_LOCALE_SUPPORT
+#ifdef NO_LOCALE_SUPPORT
+#define JSONCPP_NO_LOCALE_SUPPORT
+#endif
+
+#ifndef JSONCPP_NO_LOCALE_SUPPORT
+#include <clocale>
+#endif
+
+/* This header provides common string manipulation support, such as UTF-8,
+ * portable conversion from/to string...
+ *
+ * It is an internal header that must not be exposed.
+ */
+
+namespace Json {
+static inline char getDecimalPoint() {
+#ifdef JSONCPP_NO_LOCALE_SUPPORT
+  return '\0';
+#else
+  struct lconv* lc = localeconv();
+  return lc ? *(lc->decimal_point) : '\0';
+#endif
+}
+
+/// Converts a unicode code-point to UTF-8.
+static inline String codePointToUTF8(unsigned int cp) {
+  String result;
+
+  // based on description from http://en.wikipedia.org/wiki/UTF-8
+
+  if (cp <= 0x7f) {
+    result.resize(1);
+    result[0] = static_cast<char>(cp);
+  } else if (cp <= 0x7FF) {
+    result.resize(2);
+    result[1] = static_cast<char>(0x80 | (0x3f & cp));
+    result[0] = static_cast<char>(0xC0 | (0x1f & (cp >> 6)));
+  } else if (cp <= 0xFFFF) {
+    result.resize(3);
+    result[2] = static_cast<char>(0x80 | (0x3f & cp));
+    result[1] = static_cast<char>(0x80 | (0x3f & (cp >> 6)));
+    result[0] = static_cast<char>(0xE0 | (0xf & (cp >> 12)));
+  } else if (cp <= 0x10FFFF) {
+    result.resize(4);
+    result[3] = static_cast<char>(0x80 | (0x3f & cp));
+    result[2] = static_cast<char>(0x80 | (0x3f & (cp >> 6)));
+    result[1] = static_cast<char>(0x80 | (0x3f & (cp >> 12)));
+    result[0] = static_cast<char>(0xF0 | (0x7 & (cp >> 18)));
+  }
+
+  return result;
+}
+
+enum {
+  /// Constant that specify the size of the buffer that must be passed to
+  /// uintToString.
+  uintToStringBufferSize = 3 * sizeof(LargestUInt) + 1
+};
+
+// Defines a char buffer for use with uintToString().
+using UIntToStringBuffer = char[uintToStringBufferSize];
+
+/** Converts an unsigned integer to string.
+ * @param value Unsigned integer to convert to string
+ * @param current Input/Output string buffer.
+ *        Must have at least uintToStringBufferSize chars free.
+ */
+static inline void uintToString(LargestUInt value, char*& current) {
+  *--current = 0;
+  do {
+    *--current = static_cast<char>(value % 10U + static_cast<unsigned>('0'));
+    value /= 10;
+  } while (value != 0);
+}
+
+/** Change ',' to '.' everywhere in buffer.
+ *
+ * We had a sophisticated way, but it did not work in WinCE.
+ * @see https://github.com/open-source-parsers/jsoncpp/pull/9
+ */
+template <typename Iter> Iter fixNumericLocale(Iter begin, Iter end) {
+  for (; begin != end; ++begin) {
+    if (*begin == ',') {
+      *begin = '.';
+    }
+  }
+  return begin;
+}
+
+template <typename Iter> void fixNumericLocaleInput(Iter begin, Iter end) {
+  char decimalPoint = getDecimalPoint();
+  if (decimalPoint == '\0' || decimalPoint == '.') {
+    return;
+  }
+  for (; begin != end; ++begin) {
+    if (*begin == '.') {
+      *begin = decimalPoint;
+    }
+  }
+}
+
+/**
+ * Return iterator that would be the new end of the range [begin,end), if we
+ * were to delete zeros in the end of string, but not the last zero before '.'.
+ */
+template <typename Iter>
+Iter fixZerosInTheEnd(Iter begin, Iter end, unsigned int precision) {
+  for (; begin != end; --end) {
+    if (*(end - 1) != '0') {
+      return end;
+    }
+    // Don't delete the last zero before the decimal point.
+    if (begin != (end - 1) && begin != (end - 2) && *(end - 2) == '.') {
+      if (precision) {
+        return end;
+      }
+      return end - 2;
+    }
+  }
+  return end;
+}
+
+} // namespace Json
+
+#endif // LIB_JSONCPP_JSON_TOOL_H_INCLUDED
+
+// //////////////////////////////////////////////////////////////////////
+// End of content of file: src/lib_json/json_tool.h
+// //////////////////////////////////////////////////////////////////////
+
+
+
+
+
+
+// //////////////////////////////////////////////////////////////////////
+// Beginning of content of file: src/lib_json/json_reader.cpp
+// //////////////////////////////////////////////////////////////////////
+
+// Copyright 2007-2011 Baptiste Lepilleur and The JsonCpp Authors
+// Copyright (C) 2016 InfoTeCS JSC. All rights reserved.
+// Distributed under MIT license, or public domain if desired and
+// recognized in your jurisdiction.
+// See file LICENSE for detail or copy at http://jsoncpp.sourceforge.net/LICENSE
+
+#if !defined(JSON_IS_AMALGAMATION)
+#include "json_tool.h"
+#include <json/assertions.h>
+#include <json/reader.h>
+#include <json/value.h>
+#endif // if !defined(JSON_IS_AMALGAMATION)
+#include <algorithm>
+#include <cassert>
+#include <cmath>
+#include <cstring>
+#include <iostream>
+#include <istream>
+#include <limits>
+#include <memory>
+#include <set>
+#include <sstream>
+#include <utility>
+
+#include <cstdio>
+#if __cplusplus >= 201103L
+
+#if !defined(sscanf)
+#define sscanf std::sscanf
+#endif
+
+#endif //__cplusplus
+
+#if defined(_MSC_VER)
+#if !defined(_CRT_SECURE_CPP_OVERLOAD_STANDARD_NAMES)
+#define _CRT_SECURE_CPP_OVERLOAD_STANDARD_NAMES 1
+#endif //_CRT_SECURE_CPP_OVERLOAD_STANDARD_NAMES
+#endif //_MSC_VER
+
+#if defined(_MSC_VER)
+// Disable warning about strdup being deprecated.
+#pragma warning(disable : 4996)
+#endif
+
+// Define JSONCPP_DEPRECATED_STACK_LIMIT as an appropriate integer at compile
+// time to change the stack limit
+#if !defined(JSONCPP_DEPRECATED_STACK_LIMIT)
+#define JSONCPP_DEPRECATED_STACK_LIMIT 1000
+#endif
+
+static size_t const stackLimit_g =
+    JSONCPP_DEPRECATED_STACK_LIMIT; // see readValue()
+
+namespace Json {
+
+#if __cplusplus >= 201103L || (defined(_CPPLIB_VER) && _CPPLIB_VER >= 520)
+using CharReaderPtr = std::unique_ptr<CharReader>;
+#else
+using CharReaderPtr = std::auto_ptr<CharReader>;
+#endif
+
+// Implementation of class Features
+// ////////////////////////////////
+
+Features::Features() = default;
+
+Features Features::all() { return {}; }
+
+Features Features::strictMode() {
+  Features features;
+  features.allowComments_ = false;
+  features.strictRoot_ = true;
+  features.allowDroppedNullPlaceholders_ = false;
+  features.allowNumericKeys_ = false;
+  return features;
+}
+
+// Implementation of class Reader
+// ////////////////////////////////
+
+bool Reader::containsNewLine(Reader::Location begin, Reader::Location end) {
+  return std::any_of(begin, end, [](char b) { return b == '\n' || b == '\r'; });
+}
+
+// Class Reader
+// //////////////////////////////////////////////////////////////////
+
+Reader::Reader() : features_(Features::all()) {}
+
+Reader::Reader(const Features& features) : features_(features) {}
+
+bool Reader::parse(const std::string& document, Value& root,
+                   bool collectComments) {
+  document_.assign(document.begin(), document.end());
+  const char* begin = document_.c_str();
+  const char* end = begin + document_.length();
+  return parse(begin, end, root, collectComments);
+}
+
+bool Reader::parse(std::istream& is, Value& root, bool collectComments) {
+  // std::istream_iterator<char> begin(is);
+  // std::istream_iterator<char> end;
+  // Those would allow streamed input from a file, if parse() were a
+  // template function.
+
+  // Since String is reference-counted, this at least does not
+  // create an extra copy.
+  String doc(std::istreambuf_iterator<char>(is), {});
+  return parse(doc.data(), doc.data() + doc.size(), root, collectComments);
+}
+
+bool Reader::parse(const char* beginDoc, const char* endDoc, Value& root,
+                   bool collectComments) {
+  if (!features_.allowComments_) {
+    collectComments = false;
+  }
+
+  begin_ = beginDoc;
+  end_ = endDoc;
+  collectComments_ = collectComments;
+  current_ = begin_;
+  lastValueEnd_ = nullptr;
+  lastValue_ = nullptr;
+  commentsBefore_.clear();
+  errors_.clear();
+  while (!nodes_.empty())
+    nodes_.pop();
+  nodes_.push(&root);
+
+  bool successful = readValue();
+  Token token;
+  skipCommentTokens(token);
+  if (collectComments_ && !commentsBefore_.empty())
+    root.setComment(commentsBefore_, commentAfter);
+  if (features_.strictRoot_) {
+    if (!root.isArray() && !root.isObject()) {
+      // Set error location to start of doc, ideally should be first token found
+      // in doc
+      token.type_ = tokenError;
+      token.start_ = beginDoc;
+      token.end_ = endDoc;
+      addError(
+          "A valid JSON document must be either an array or an object value.",
+          token);
+      return false;
+    }
+  }
+  return successful;
+}
+
+bool Reader::readValue() {
+  // readValue() may call itself only if it calls readObject() or ReadArray().
+  // These methods execute nodes_.push() just before and nodes_.pop)() just
+  // after calling readValue(). parse() executes one nodes_.push(), so > instead
+  // of >=.
+  if (nodes_.size() > stackLimit_g)
+    throwRuntimeError("Exceeded stackLimit in readValue().");
+
+  Token token;
+  skipCommentTokens(token);
+  bool successful = true;
+
+  if (collectComments_ && !commentsBefore_.empty()) {
+    currentValue().setComment(commentsBefore_, commentBefore);
+    commentsBefore_.clear();
+  }
+
+  switch (token.type_) {
+  case tokenObjectBegin:
+    successful = readObject(token);
+    currentValue().setOffsetLimit(current_ - begin_);
+    break;
+  case tokenArrayBegin:
+    successful = readArray(token);
+    currentValue().setOffsetLimit(current_ - begin_);
+    break;
+  case tokenNumber:
+    successful = decodeNumber(token);
+    break;
+  case tokenString:
+    successful = decodeString(token);
+    break;
+  case tokenTrue: {
+    Value v(true);
+    currentValue().swapPayload(v);
+    currentValue().setOffsetStart(token.start_ - begin_);
+    currentValue().setOffsetLimit(token.end_ - begin_);
+  } break;
+  case tokenFalse: {
+    Value v(false);
+    currentValue().swapPayload(v);
+    currentValue().setOffsetStart(token.start_ - begin_);
+    currentValue().setOffsetLimit(token.end_ - begin_);
+  } break;
+  case tokenNull: {
+    Value v;
+    currentValue().swapPayload(v);
+    currentValue().setOffsetStart(token.start_ - begin_);
+    currentValue().setOffsetLimit(token.end_ - begin_);
+  } break;
+  case tokenArraySeparator:
+  case tokenObjectEnd:
+  case tokenArrayEnd:
+    if (features_.allowDroppedNullPlaceholders_) {
+      // "Un-read" the current token and mark the current value as a null
+      // token.
+      current_--;
+      Value v;
+      currentValue().swapPayload(v);
+      currentValue().setOffsetStart(current_ - begin_ - 1);
+      currentValue().setOffsetLimit(current_ - begin_);
+      break;
+    } // Else, fall through...
+  default:
+    currentValue().setOffsetStart(token.start_ - begin_);
+    currentValue().setOffsetLimit(token.end_ - begin_);
+    return addError("Syntax error: value, object or array expected.", token);
+  }
+
+  if (collectComments_) {
+    lastValueEnd_ = current_;
+    lastValue_ = &currentValue();
+  }
+
+  return successful;
+}
+
+void Reader::skipCommentTokens(Token& token) {
+  if (features_.allowComments_) {
+    do {
+      readToken(token);
+    } while (token.type_ == tokenComment);
+  } else {
+    readToken(token);
+  }
+}
+
+bool Reader::readToken(Token& token) {
+  skipSpaces();
+  token.start_ = current_;
+  Char c = getNextChar();
+  bool ok = true;
+  switch (c) {
+  case '{':
+    token.type_ = tokenObjectBegin;
+    break;
+  case '}':
+    token.type_ = tokenObjectEnd;
+    break;
+  case '[':
+    token.type_ = tokenArrayBegin;
+    break;
+  case ']':
+    token.type_ = tokenArrayEnd;
+    break;
+  case '"':
+    token.type_ = tokenString;
+    ok = readString();
+    break;
+  case '/':
+    token.type_ = tokenComment;
+    ok = readComment();
+    break;
+  case '0':
+  case '1':
+  case '2':
+  case '3':
+  case '4':
+  case '5':
+  case '6':
+  case '7':
+  case '8':
+  case '9':
+  case '-':
+    token.type_ = tokenNumber;
+    readNumber();
+    break;
+  case 't':
+    token.type_ = tokenTrue;
+    ok = match("rue", 3);
+    break;
+  case 'f':
+    token.type_ = tokenFalse;
+    ok = match("alse", 4);
+    break;
+  case 'n':
+    token.type_ = tokenNull;
+    ok = match("ull", 3);
+    break;
+  case ',':
+    token.type_ = tokenArraySeparator;
+    break;
+  case ':':
+    token.type_ = tokenMemberSeparator;
+    break;
+  case 0:
+    token.type_ = tokenEndOfStream;
+    break;
+  default:
+    ok = false;
+    break;
+  }
+  if (!ok)
+    token.type_ = tokenError;
+  token.end_ = current_;
+  return ok;
+}
+
+void Reader::skipSpaces() {
+  while (current_ != end_) {
+    Char c = *current_;
+    if (c == ' ' || c == '\t' || c == '\r' || c == '\n')
+      ++current_;
+    else
+      break;
+  }
+}
+
+bool Reader::match(const Char* pattern, int patternLength) {
+  if (end_ - current_ < patternLength)
+    return false;
+  int index = patternLength;
+  while (index--)
+    if (current_[index] != pattern[index])
+      return false;
+  current_ += patternLength;
+  return true;
+}
+
+bool Reader::readComment() {
+  Location commentBegin = current_ - 1;
+  Char c = getNextChar();
+  bool successful = false;
+  if (c == '*')
+    successful = readCStyleComment();
+  else if (c == '/')
+    successful = readCppStyleComment();
+  if (!successful)
+    return false;
+
+  if (collectComments_) {
+    CommentPlacement placement = commentBefore;
+    if (lastValueEnd_ && !containsNewLine(lastValueEnd_, commentBegin)) {
+      if (c != '*' || !containsNewLine(commentBegin, current_))
+        placement = commentAfterOnSameLine;
+    }
+
+    addComment(commentBegin, current_, placement);
+  }
+  return true;
+}
+
+String Reader::normalizeEOL(Reader::Location begin, Reader::Location end) {
+  String normalized;
+  normalized.reserve(static_cast<size_t>(end - begin));
+  Reader::Location current = begin;
+  while (current != end) {
+    char c = *current++;
+    if (c == '\r') {
+      if (current != end && *current == '\n')
+        // convert dos EOL
+        ++current;
+      // convert Mac EOL
+      normalized += '\n';
+    } else {
+      normalized += c;
+    }
+  }
+  return normalized;
+}
+
+void Reader::addComment(Location begin, Location end,
+                        CommentPlacement placement) {
+  assert(collectComments_);
+  const String& normalized = normalizeEOL(begin, end);
+  if (placement == commentAfterOnSameLine) {
+    assert(lastValue_ != nullptr);
+    lastValue_->setComment(normalized, placement);
+  } else {
+    commentsBefore_ += normalized;
+  }
+}
+
+bool Reader::readCStyleComment() {
+  while ((current_ + 1) < end_) {
+    Char c = getNextChar();
+    if (c == '*' && *current_ == '/')
+      break;
+  }
+  return getNextChar() == '/';
+}
+
+bool Reader::readCppStyleComment() {
+  while (current_ != end_) {
+    Char c = getNextChar();
+    if (c == '\n')
+      break;
+    if (c == '\r') {
+      // Consume DOS EOL. It will be normalized in addComment.
+      if (current_ != end_ && *current_ == '\n')
+        getNextChar();
+      // Break on Moc OS 9 EOL.
+      break;
+    }
+  }
+  return true;
+}
+
+void Reader::readNumber() {
+  Location p = current_;
+  char c = '0'; // stopgap for already consumed character
+  // integral part
+  while (c >= '0' && c <= '9')
+    c = (current_ = p) < end_ ? *p++ : '\0';
+  // fractional part
+  if (c == '.') {
+    c = (current_ = p) < end_ ? *p++ : '\0';
+    while (c >= '0' && c <= '9')
+      c = (current_ = p) < end_ ? *p++ : '\0';
+  }
+  // exponential part
+  if (c == 'e' || c == 'E') {
+    c = (current_ = p) < end_ ? *p++ : '\0';
+    if (c == '+' || c == '-')
+      c = (current_ = p) < end_ ? *p++ : '\0';
+    while (c >= '0' && c <= '9')
+      c = (current_ = p) < end_ ? *p++ : '\0';
+  }
+}
+
+bool Reader::readString() {
+  Char c = '\0';
+  while (current_ != end_) {
+    c = getNextChar();
+    if (c == '\\')
+      getNextChar();
+    else if (c == '"')
+      break;
+  }
+  return c == '"';
+}
+
+bool Reader::readObject(Token& token) {
+  Token tokenName;
+  String name;
+  Value init(objectValue);
+  currentValue().swapPayload(init);
+  currentValue().setOffsetStart(token.start_ - begin_);
+  while (readToken(tokenName)) {
+    bool initialTokenOk = true;
+    while (tokenName.type_ == tokenComment && initialTokenOk)
+      initialTokenOk = readToken(tokenName);
+    if (!initialTokenOk)
+      break;
+    if (tokenName.type_ == tokenObjectEnd && name.empty()) // empty object
+      return true;
+    name.clear();
+    if (tokenName.type_ == tokenString) {
+      if (!decodeString(tokenName, name))
+        return recoverFromError(tokenObjectEnd);
+    } else if (tokenName.type_ == tokenNumber && features_.allowNumericKeys_) {
+      Value numberName;
+      if (!decodeNumber(tokenName, numberName))
+        return recoverFromError(tokenObjectEnd);
+      name = numberName.asString();
+    } else {
+      break;
+    }
+
+    Token colon;
+    if (!readToken(colon) || colon.type_ != tokenMemberSeparator) {
+      return addErrorAndRecover("Missing ':' after object member name", colon,
+                                tokenObjectEnd);
+    }
+    Value& value = currentValue()[name];
+    nodes_.push(&value);
+    bool ok = readValue();
+    nodes_.pop();
+    if (!ok) // error already set
+      return recoverFromError(tokenObjectEnd);
+
+    Token comma;
+    if (!readToken(comma) ||
+        (comma.type_ != tokenObjectEnd && comma.type_ != tokenArraySeparator &&
+         comma.type_ != tokenComment)) {
+      return addErrorAndRecover("Missing ',' or '}' in object declaration",
+                                comma, tokenObjectEnd);
+    }
+    bool finalizeTokenOk = true;
+    while (comma.type_ == tokenComment && finalizeTokenOk)
+      finalizeTokenOk = readToken(comma);
+    if (comma.type_ == tokenObjectEnd)
+      return true;
+  }
+  return addErrorAndRecover("Missing '}' or object member name", tokenName,
+                            tokenObjectEnd);
+}
+
+bool Reader::readArray(Token& token) {
+  Value init(arrayValue);
+  currentValue().swapPayload(init);
+  currentValue().setOffsetStart(token.start_ - begin_);
+  skipSpaces();
+  if (current_ != end_ && *current_ == ']') // empty array
+  {
+    Token endArray;
+    readToken(endArray);
+    return true;
+  }
+  int index = 0;
+  for (;;) {
+    Value& value = currentValue()[index++];
+    nodes_.push(&value);
+    bool ok = readValue();
+    nodes_.pop();
+    if (!ok) // error already set
+      return recoverFromError(tokenArrayEnd);
+
+    Token currentToken;
+    // Accept Comment after last item in the array.
+    ok = readToken(currentToken);
+    while (currentToken.type_ == tokenComment && ok) {
+      ok = readToken(currentToken);
+    }
+    bool badTokenType = (currentToken.type_ != tokenArraySeparator &&
+                         currentToken.type_ != tokenArrayEnd);
+    if (!ok || badTokenType) {
+      return addErrorAndRecover("Missing ',' or ']' in array declaration",
+                                currentToken, tokenArrayEnd);
+    }
+    if (currentToken.type_ == tokenArrayEnd)
+      break;
+  }
+  return true;
+}
+
+bool Reader::decodeNumber(Token& token) {
+  Value decoded;
+  if (!decodeNumber(token, decoded))
+    return false;
+  currentValue().swapPayload(decoded);
+  currentValue().setOffsetStart(token.start_ - begin_);
+  currentValue().setOffsetLimit(token.end_ - begin_);
+  return true;
+}
+
+bool Reader::decodeNumber(Token& token, Value& decoded) {
+  // Attempts to parse the number as an integer. If the number is
+  // larger than the maximum supported value of an integer then
+  // we decode the number as a double.
+  Location current = token.start_;
+  bool isNegative = *current == '-';
+  if (isNegative)
+    ++current;
+  // TODO: Help the compiler do the div and mod at compile time or get rid of
+  // them.
+  Value::LargestUInt maxIntegerValue =
+      isNegative ? Value::LargestUInt(Value::maxLargestInt) + 1
+                 : Value::maxLargestUInt;
+  Value::LargestUInt threshold = maxIntegerValue / 10;
+  Value::LargestUInt value = 0;
+  while (current < token.end_) {
+    Char c = *current++;
+    if (c < '0' || c > '9')
+      return decodeDouble(token, decoded);
+    auto digit(static_cast<Value::UInt>(c - '0'));
+    if (value >= threshold) {
+      // We've hit or exceeded the max value divided by 10 (rounded down). If
+      // a) we've only just touched the limit, b) this is the last digit, and
+      // c) it's small enough to fit in that rounding delta, we're okay.
+      // Otherwise treat this number as a double to avoid overflow.
+      if (value > threshold || current != token.end_ ||
+          digit > maxIntegerValue % 10) {
+        return decodeDouble(token, decoded);
+      }
+    }
+    value = value * 10 + digit;
+  }
+  if (isNegative && value == maxIntegerValue)
+    decoded = Value::minLargestInt;
+  else if (isNegative)
+    decoded = -Value::LargestInt(value);
+  else if (value <= Value::LargestUInt(Value::maxInt))
+    decoded = Value::LargestInt(value);
+  else
+    decoded = value;
+  return true;
+}
+
+bool Reader::decodeDouble(Token& token) {
+  Value decoded;
+  if (!decodeDouble(token, decoded))
+    return false;
+  currentValue().swapPayload(decoded);
+  currentValue().setOffsetStart(token.start_ - begin_);
+  currentValue().setOffsetLimit(token.end_ - begin_);
+  return true;
+}
+
+bool Reader::decodeDouble(Token& token, Value& decoded) {
+  double value = 0;
+  String buffer(token.start_, token.end_);
+  IStringStream is(buffer);
+  if (!(is >> value)) {
+    if (value == std::numeric_limits<double>::max())
+      value = std::numeric_limits<double>::infinity();
+    else if (value == std::numeric_limits<double>::lowest())
+      value = -std::numeric_limits<double>::infinity();
+    else if (!std::isinf(value))
+      return addError(
+        "'" + String(token.start_, token.end_) + "' is not a number.", token);
+  }
+  decoded = value;
+  return true;
+}
+
+bool Reader::decodeString(Token& token) {
+  String decoded_string;
+  if (!decodeString(token, decoded_string))
+    return false;
+  Value decoded(decoded_string);
+  currentValue().swapPayload(decoded);
+  currentValue().setOffsetStart(token.start_ - begin_);
+  currentValue().setOffsetLimit(token.end_ - begin_);
+  return true;
+}
+
+bool Reader::decodeString(Token& token, String& decoded) {
+  decoded.reserve(static_cast<size_t>(token.end_ - token.start_ - 2));
+  Location current = token.start_ + 1; // skip '"'
+  Location end = token.end_ - 1;       // do not include '"'
+  while (current != end) {
+    Char c = *current++;
+    if (c == '"')
+      break;
+    if (c == '\\') {
+      if (current == end)
+        return addError("Empty escape sequence in string", token, current);
+      Char escape = *current++;
+      switch (escape) {
+      case '"':
+        decoded += '"';
+        break;
+      case '/':
+        decoded += '/';
+        break;
+      case '\\':
+        decoded += '\\';
+        break;
+      case 'b':
+        decoded += '\b';
+        break;
+      case 'f':
+        decoded += '\f';
+        break;
+      case 'n':
+        decoded += '\n';
+        break;
+      case 'r':
+        decoded += '\r';
+        break;
+      case 't':
+        decoded += '\t';
+        break;
+      case 'u': {
+        unsigned int unicode;
+        if (!decodeUnicodeCodePoint(token, current, end, unicode))
+          return false;
+        decoded += codePointToUTF8(unicode);
+      } break;
+      default:
+        return addError("Bad escape sequence in string", token, current);
+      }
+    } else {
+      decoded += c;
+    }
+  }
+  return true;
+}
+
+bool Reader::decodeUnicodeCodePoint(Token& token, Location& current,
+                                    Location end, unsigned int& unicode) {
+
+  if (!decodeUnicodeEscapeSequence(token, current, end, unicode))
+    return false;
+  if (unicode >= 0xD800 && unicode <= 0xDBFF) {
+    // surrogate pairs
+    if (end - current < 6)
+      return addError(
+          "additional six characters expected to parse unicode surrogate pair.",
+          token, current);
+    if (*(current++) == '\\' && *(current++) == 'u') {
+      unsigned int surrogatePair;
+      if (decodeUnicodeEscapeSequence(token, current, end, surrogatePair)) {
+        unicode = 0x10000 + ((unicode & 0x3FF) << 10) + (surrogatePair & 0x3FF);
+      } else
+        return false;
+    } else
+      return addError("expecting another \\u token to begin the second half of "
+                      "a unicode surrogate pair",
+                      token, current);
+  }
+  return true;
+}
+
+bool Reader::decodeUnicodeEscapeSequence(Token& token, Location& current,
+                                         Location end,
+                                         unsigned int& ret_unicode) {
+  if (end - current < 4)
+    return addError(
+        "Bad unicode escape sequence in string: four digits expected.", token,
+        current);
+  int unicode = 0;
+  for (int index = 0; index < 4; ++index) {
+    Char c = *current++;
+    unicode *= 16;
+    if (c >= '0' && c <= '9')
+      unicode += c - '0';
+    else if (c >= 'a' && c <= 'f')
+      unicode += c - 'a' + 10;
+    else if (c >= 'A' && c <= 'F')
+      unicode += c - 'A' + 10;
+    else
+      return addError(
+          "Bad unicode escape sequence in string: hexadecimal digit expected.",
+          token, current);
+  }
+  ret_unicode = static_cast<unsigned int>(unicode);
+  return true;
+}
+
+bool Reader::addError(const String& message, Token& token, Location extra) {
+  ErrorInfo info;
+  info.token_ = token;
+  info.message_ = message;
+  info.extra_ = extra;
+  errors_.push_back(info);
+  return false;
+}
+
+bool Reader::recoverFromError(TokenType skipUntilToken) {
+  size_t const errorCount = errors_.size();
+  Token skip;
+  for (;;) {
+    if (!readToken(skip))
+      errors_.resize(errorCount); // discard errors caused by recovery
+    if (skip.type_ == skipUntilToken || skip.type_ == tokenEndOfStream)
+      break;
+  }
+  errors_.resize(errorCount);
+  return false;
+}
+
+bool Reader::addErrorAndRecover(const String& message, Token& token,
+                                TokenType skipUntilToken) {
+  addError(message, token);
+  return recoverFromError(skipUntilToken);
+}
+
+Value& Reader::currentValue() { return *(nodes_.top()); }
+
+Reader::Char Reader::getNextChar() {
+  if (current_ == end_)
+    return 0;
+  return *current_++;
+}
+
+void Reader::getLocationLineAndColumn(Location location, int& line,
+                                      int& column) const {
+  Location current = begin_;
+  Location lastLineStart = current;
+  line = 0;
+  while (current < location && current != end_) {
+    Char c = *current++;
+    if (c == '\r') {
+      if (*current == '\n')
+        ++current;
+      lastLineStart = current;
+      ++line;
+    } else if (c == '\n') {
+      lastLineStart = current;
+      ++line;
+    }
+  }
+  // column & line start at 1
+  column = int(location - lastLineStart) + 1;
+  ++line;
+}
+
+String Reader::getLocationLineAndColumn(Location location) const {
+  int line, column;
+  getLocationLineAndColumn(location, line, column);
+  char buffer[18 + 16 + 16 + 1];
+  jsoncpp_snprintf(buffer, sizeof(buffer), "Line %d, Column %d", line, column);
+  return buffer;
+}
+
+// Deprecated. Preserved for backward compatibility
+String Reader::getFormatedErrorMessages() const {
+  return getFormattedErrorMessages();
+}
+
+String Reader::getFormattedErrorMessages() const {
+  String formattedMessage;
+  for (const auto& error : errors_) {
+    formattedMessage +=
+        "* " + getLocationLineAndColumn(error.token_.start_) + "\n";
+    formattedMessage += "  " + error.message_ + "\n";
+    if (error.extra_)
+      formattedMessage +=
+          "See " + getLocationLineAndColumn(error.extra_) + " for detail.\n";
+  }
+  return formattedMessage;
+}
+
+std::vector<Reader::StructuredError> Reader::getStructuredErrors() const {
+  std::vector<Reader::StructuredError> allErrors;
+  for (const auto& error : errors_) {
+    Reader::StructuredError structured;
+    structured.offset_start = error.token_.start_ - begin_;
+    structured.offset_limit = error.token_.end_ - begin_;
+    structured.message = error.message_;
+    allErrors.push_back(structured);
+  }
+  return allErrors;
+}
+
+bool Reader::pushError(const Value& value, const String& message) {
+  ptrdiff_t const length = end_ - begin_;
+  if (value.getOffsetStart() > length || value.getOffsetLimit() > length)
+    return false;
+  Token token;
+  token.type_ = tokenError;
+  token.start_ = begin_ + value.getOffsetStart();
+  token.end_ = begin_ + value.getOffsetLimit();
+  ErrorInfo info;
+  info.token_ = token;
+  info.message_ = message;
+  info.extra_ = nullptr;
+  errors_.push_back(info);
+  return true;
+}
+
+bool Reader::pushError(const Value& value, const String& message,
+                       const Value& extra) {
+  ptrdiff_t const length = end_ - begin_;
+  if (value.getOffsetStart() > length || value.getOffsetLimit() > length ||
+      extra.getOffsetLimit() > length)
+    return false;
+  Token token;
+  token.type_ = tokenError;
+  token.start_ = begin_ + value.getOffsetStart();
+  token.end_ = begin_ + value.getOffsetLimit();
+  ErrorInfo info;
+  info.token_ = token;
+  info.message_ = message;
+  info.extra_ = begin_ + extra.getOffsetStart();
+  errors_.push_back(info);
+  return true;
+}
+
+bool Reader::good() const { return errors_.empty(); }
+
+// Originally copied from the Features class (now deprecated), used internally
+// for features implementation.
+class OurFeatures {
+public:
+  static OurFeatures all();
+  bool allowComments_;
+  bool allowTrailingCommas_;
+  bool strictRoot_;
+  bool allowDroppedNullPlaceholders_;
+  bool allowNumericKeys_;
+  bool allowSingleQuotes_;
+  bool failIfExtra_;
+  bool rejectDupKeys_;
+  bool allowSpecialFloats_;
+  bool skipBom_;
+  size_t stackLimit_;
+}; // OurFeatures
+
+OurFeatures OurFeatures::all() { return {}; }
+
+// Implementation of class Reader
+// ////////////////////////////////
+
+// Originally copied from the Reader class (now deprecated), used internally
+// for implementing JSON reading.
+class OurReader {
+public:
+  using Char = char;
+  using Location = const Char*;
+  struct StructuredError {
+    ptrdiff_t offset_start;
+    ptrdiff_t offset_limit;
+    String message;
+  };
+
+  explicit OurReader(OurFeatures const& features);
+  bool parse(const char* beginDoc, const char* endDoc, Value& root,
+             bool collectComments = true);
+  String getFormattedErrorMessages() const;
+  std::vector<StructuredError> getStructuredErrors() const;
+
+private:
+  OurReader(OurReader const&);      // no impl
+  void operator=(OurReader const&); // no impl
+
+  enum TokenType {
+    tokenEndOfStream = 0,
+    tokenObjectBegin,
+    tokenObjectEnd,
+    tokenArrayBegin,
+    tokenArrayEnd,
+    tokenString,
+    tokenNumber,
+    tokenTrue,
+    tokenFalse,
+    tokenNull,
+    tokenNaN,
+    tokenPosInf,
+    tokenNegInf,
+    tokenArraySeparator,
+    tokenMemberSeparator,
+    tokenComment,
+    tokenError
+  };
+
+  class Token {
+  public:
+    TokenType type_;
+    Location start_;
+    Location end_;
+  };
+
+  class ErrorInfo {
+  public:
+    Token token_;
+    String message_;
+    Location extra_;
+  };
+
+  using Errors = std::deque<ErrorInfo>;
+
+  bool readToken(Token& token);
+  void skipSpaces();
+  void skipBom(bool skipBom);
+  bool match(const Char* pattern, int patternLength);
+  bool readComment();
+  bool readCStyleComment(bool* containsNewLineResult);
+  bool readCppStyleComment();
+  bool readString();
+  bool readStringSingleQuote();
+  bool readNumber(bool checkInf);
+  bool readValue();
+  bool readObject(Token& token);
+  bool readArray(Token& token);
+  bool decodeNumber(Token& token);
+  bool decodeNumber(Token& token, Value& decoded);
+  bool decodeString(Token& token);
+  bool decodeString(Token& token, String& decoded);
+  bool decodeDouble(Token& token);
+  bool decodeDouble(Token& token, Value& decoded);
+  bool decodeUnicodeCodePoint(Token& token, Location& current, Location end,
+                              unsigned int& unicode);
+  bool decodeUnicodeEscapeSequence(Token& token, Location& current,
+                                   Location end, unsigned int& unicode);
+  bool addError(const String& message, Token& token, Location extra = nullptr);
+  bool recoverFromError(TokenType skipUntilToken);
+  bool addErrorAndRecover(const String& message, Token& token,
+                          TokenType skipUntilToken);
+  void skipUntilSpace();
+  Value& currentValue();
+  Char getNextChar();
+  void getLocationLineAndColumn(Location location, int& line,
+                                int& column) const;
+  String getLocationLineAndColumn(Location location) const;
+  void addComment(Location begin, Location end, CommentPlacement placement);
+  void skipCommentTokens(Token& token);
+
+  static String normalizeEOL(Location begin, Location end);
+  static bool containsNewLine(Location begin, Location end);
+
+  using Nodes = std::stack<Value*>;
+
+  Nodes nodes_{};
+  Errors errors_{};
+  String document_{};
+  Location begin_ = nullptr;
+  Location end_ = nullptr;
+  Location current_ = nullptr;
+  Location lastValueEnd_ = nullptr;
+  Value* lastValue_ = nullptr;
+  bool lastValueHasAComment_ = false;
+  String commentsBefore_{};
+
+  OurFeatures const features_;
+  bool collectComments_ = false;
+}; // OurReader
+
+// complete copy of Read impl, for OurReader
+
+bool OurReader::containsNewLine(OurReader::Location begin,
+                                OurReader::Location end) {
+  return std::any_of(begin, end, [](char b) { return b == '\n' || b == '\r'; });
+}
+
+OurReader::OurReader(OurFeatures const& features) : features_(features) {}
+
+bool OurReader::parse(const char* beginDoc, const char* endDoc, Value& root,
+                      bool collectComments) {
+  if (!features_.allowComments_) {
+    collectComments = false;
+  }
+
+  begin_ = beginDoc;
+  end_ = endDoc;
+  collectComments_ = collectComments;
+  current_ = begin_;
+  lastValueEnd_ = nullptr;
+  lastValue_ = nullptr;
+  commentsBefore_.clear();
+  errors_.clear();
+  while (!nodes_.empty())
+    nodes_.pop();
+  nodes_.push(&root);
+
+  // skip byte order mark if it exists at the beginning of the UTF-8 text.
+  skipBom(features_.skipBom_);
+  bool successful = readValue();
+  nodes_.pop();
+  Token token;
+  skipCommentTokens(token);
+  if (features_.failIfExtra_ && (token.type_ != tokenEndOfStream)) {
+    addError("Extra non-whitespace after JSON value.", token);
+    return false;
+  }
+  if (collectComments_ && !commentsBefore_.empty())
+    root.setComment(commentsBefore_, commentAfter);
+  if (features_.strictRoot_) {
+    if (!root.isArray() && !root.isObject()) {
+      // Set error location to start of doc, ideally should be first token found
+      // in doc
+      token.type_ = tokenError;
+      token.start_ = beginDoc;
+      token.end_ = endDoc;
+      addError(
+          "A valid JSON document must be either an array or an object value.",
+          token);
+      return false;
+    }
+  }
+  return successful;
+}
+
+bool OurReader::readValue() {
+  //  To preserve the old behaviour we cast size_t to int.
+  if (nodes_.size() > features_.stackLimit_)
+    throwRuntimeError("Exceeded stackLimit in readValue().");
+  Token token;
+  skipCommentTokens(token);
+  bool successful = true;
+
+  if (collectComments_ && !commentsBefore_.empty()) {
+    currentValue().setComment(commentsBefore_, commentBefore);
+    commentsBefore_.clear();
+  }
+
+  switch (token.type_) {
+  case tokenObjectBegin:
+    successful = readObject(token);
+    currentValue().setOffsetLimit(current_ - begin_);
+    break;
+  case tokenArrayBegin:
+    successful = readArray(token);
+    currentValue().setOffsetLimit(current_ - begin_);
+    break;
+  case tokenNumber:
+    successful = decodeNumber(token);
+    break;
+  case tokenString:
+    successful = decodeString(token);
+    break;
+  case tokenTrue: {
+    Value v(true);
+    currentValue().swapPayload(v);
+    currentValue().setOffsetStart(token.start_ - begin_);
+    currentValue().setOffsetLimit(token.end_ - begin_);
+  } break;
+  case tokenFalse: {
+    Value v(false);
+    currentValue().swapPayload(v);
+    currentValue().setOffsetStart(token.start_ - begin_);
+    currentValue().setOffsetLimit(token.end_ - begin_);
+  } break;
+  case tokenNull: {
+    Value v;
+    currentValue().swapPayload(v);
+    currentValue().setOffsetStart(token.start_ - begin_);
+    currentValue().setOffsetLimit(token.end_ - begin_);
+  } break;
+  case tokenNaN: {
+    Value v(std::numeric_limits<double>::quiet_NaN());
+    currentValue().swapPayload(v);
+    currentValue().setOffsetStart(token.start_ - begin_);
+    currentValue().setOffsetLimit(token.end_ - begin_);
+  } break;
+  case tokenPosInf: {
+    Value v(std::numeric_limits<double>::infinity());
+    currentValue().swapPayload(v);
+    currentValue().setOffsetStart(token.start_ - begin_);
+    currentValue().setOffsetLimit(token.end_ - begin_);
+  } break;
+  case tokenNegInf: {
+    Value v(-std::numeric_limits<double>::infinity());
+    currentValue().swapPayload(v);
+    currentValue().setOffsetStart(token.start_ - begin_);
+    currentValue().setOffsetLimit(token.end_ - begin_);
+  } break;
+  case tokenArraySeparator:
+  case tokenObjectEnd:
+  case tokenArrayEnd:
+    if (features_.allowDroppedNullPlaceholders_) {
+      // "Un-read" the current token and mark the current value as a null
+      // token.
+      current_--;
+      Value v;
+      currentValue().swapPayload(v);
+      currentValue().setOffsetStart(current_ - begin_ - 1);
+      currentValue().setOffsetLimit(current_ - begin_);
+      break;
+    } // else, fall through ...
+  default:
+    currentValue().setOffsetStart(token.start_ - begin_);
+    currentValue().setOffsetLimit(token.end_ - begin_);
+    return addError("Syntax error: value, object or array expected.", token);
+  }
+
+  if (collectComments_) {
+    lastValueEnd_ = current_;
+    lastValueHasAComment_ = false;
+    lastValue_ = &currentValue();
+  }
+
+  return successful;
+}
+
+void OurReader::skipCommentTokens(Token& token) {
+  if (features_.allowComments_) {
+    do {
+      readToken(token);
+    } while (token.type_ == tokenComment);
+  } else {
+    readToken(token);
+  }
+}
+
+bool OurReader::readToken(Token& token) {
+  skipSpaces();
+  token.start_ = current_;
+  Char c = getNextChar();
+  bool ok = true;
+  switch (c) {
+  case '{':
+    token.type_ = tokenObjectBegin;
+    break;
+  case '}':
+    token.type_ = tokenObjectEnd;
+    break;
+  case '[':
+    token.type_ = tokenArrayBegin;
+    break;
+  case ']':
+    token.type_ = tokenArrayEnd;
+    break;
+  case '"':
+    token.type_ = tokenString;
+    ok = readString();
+    break;
+  case '\'':
+    if (features_.allowSingleQuotes_) {
+      token.type_ = tokenString;
+      ok = readStringSingleQuote();
+    } else {
+      // If we don't allow single quotes, this is a failure case.
+      ok = false;
+    }
+    break;
+  case '/':
+    token.type_ = tokenComment;
+    ok = readComment();
+    break;
+  case '0':
+  case '1':
+  case '2':
+  case '3':
+  case '4':
+  case '5':
+  case '6':
+  case '7':
+  case '8':
+  case '9':
+    token.type_ = tokenNumber;
+    readNumber(false);
+    break;
+  case '-':
+    if (readNumber(true)) {
+      token.type_ = tokenNumber;
+    } else {
+      token.type_ = tokenNegInf;
+      ok = features_.allowSpecialFloats_ && match("nfinity", 7);
+    }
+    break;
+  case '+':
+    if (readNumber(true)) {
+      token.type_ = tokenNumber;
+    } else {
+      token.type_ = tokenPosInf;
+      ok = features_.allowSpecialFloats_ && match("nfinity", 7);
+    }
+    break;
+  case 't':
+    token.type_ = tokenTrue;
+    ok = match("rue", 3);
+    break;
+  case 'f':
+    token.type_ = tokenFalse;
+    ok = match("alse", 4);
+    break;
+  case 'n':
+    token.type_ = tokenNull;
+    ok = match("ull", 3);
+    break;
+  case 'N':
+    if (features_.allowSpecialFloats_) {
+      token.type_ = tokenNaN;
+      ok = match("aN", 2);
+    } else {
+      ok = false;
+    }
+    break;
+  case 'I':
+    if (features_.allowSpecialFloats_) {
+      token.type_ = tokenPosInf;
+      ok = match("nfinity", 7);
+    } else {
+      ok = false;
+    }
+    break;
+  case ',':
+    token.type_ = tokenArraySeparator;
+    break;
+  case ':':
+    token.type_ = tokenMemberSeparator;
+    break;
+  case 0:
+    token.type_ = tokenEndOfStream;
+    break;
+  default:
+    ok = false;
+    break;
+  }
+  if (!ok)
+    token.type_ = tokenError;
+  token.end_ = current_;
+  return ok;
+}
+
+void OurReader::skipSpaces() {
+  while (current_ != end_) {
+    Char c = *current_;
+    if (c == ' ' || c == '\t' || c == '\r' || c == '\n')
+      ++current_;
+    else
+      break;
+  }
+}
+
+void OurReader::skipBom(bool skipBom) {
+  // The default behavior is to skip BOM.
+  if (skipBom) {
+    if ((end_ - begin_) >= 3 && strncmp(begin_, "\xEF\xBB\xBF", 3) == 0) {
+      begin_ += 3;
+      current_ = begin_;
+    }
+  }
+}
+
+bool OurReader::match(const Char* pattern, int patternLength) {
+  if (end_ - current_ < patternLength)
+    return false;
+  int index = patternLength;
+  while (index--)
+    if (current_[index] != pattern[index])
+      return false;
+  current_ += patternLength;
+  return true;
+}
+
+bool OurReader::readComment() {
+  const Location commentBegin = current_ - 1;
+  const Char c = getNextChar();
+  bool successful = false;
+  bool cStyleWithEmbeddedNewline = false;
+
+  const bool isCStyleComment = (c == '*');
+  const bool isCppStyleComment = (c == '/');
+  if (isCStyleComment) {
+    successful = readCStyleComment(&cStyleWithEmbeddedNewline);
+  } else if (isCppStyleComment) {
+    successful = readCppStyleComment();
+  }
+
+  if (!successful)
+    return false;
+
+  if (collectComments_) {
+    CommentPlacement placement = commentBefore;
+
+    if (!lastValueHasAComment_) {
+      if (lastValueEnd_ && !containsNewLine(lastValueEnd_, commentBegin)) {
+        if (isCppStyleComment || !cStyleWithEmbeddedNewline) {
+          placement = commentAfterOnSameLine;
+          lastValueHasAComment_ = true;
+        }
+      }
+    }
+
+    addComment(commentBegin, current_, placement);
+  }
+  return true;
+}
+
+String OurReader::normalizeEOL(OurReader::Location begin,
+                               OurReader::Location end) {
+  String normalized;
+  normalized.reserve(static_cast<size_t>(end - begin));
+  OurReader::Location current = begin;
+  while (current != end) {
+    char c = *current++;
+    if (c == '\r') {
+      if (current != end && *current == '\n')
+        // convert dos EOL
+        ++current;
+      // convert Mac EOL
+      normalized += '\n';
+    } else {
+      normalized += c;
+    }
+  }
+  return normalized;
+}
+
+void OurReader::addComment(Location begin, Location end,
+                           CommentPlacement placement) {
+  assert(collectComments_);
+  const String& normalized = normalizeEOL(begin, end);
+  if (placement == commentAfterOnSameLine) {
+    assert(lastValue_ != nullptr);
+    lastValue_->setComment(normalized, placement);
+  } else {
+    commentsBefore_ += normalized;
+  }
+}
+
+bool OurReader::readCStyleComment(bool* containsNewLineResult) {
+  *containsNewLineResult = false;
+
+  while ((current_ + 1) < end_) {
+    Char c = getNextChar();
+    if (c == '*' && *current_ == '/')
+      break;
+    if (c == '\n')
+      *containsNewLineResult = true;
+  }
+
+  return getNextChar() == '/';
+}
+
+bool OurReader::readCppStyleComment() {
+  while (current_ != end_) {
+    Char c = getNextChar();
+    if (c == '\n')
+      break;
+    if (c == '\r') {
+      // Consume DOS EOL. It will be normalized in addComment.
+      if (current_ != end_ && *current_ == '\n')
+        getNextChar();
+      // Break on Moc OS 9 EOL.
+      break;
+    }
+  }
+  return true;
+}
+
+bool OurReader::readNumber(bool checkInf) {
+  Location p = current_;
+  if (checkInf && p != end_ && *p == 'I') {
+    current_ = ++p;
+    return false;
+  }
+  char c = '0'; // stopgap for already consumed character
+  // integral part
+  while (c >= '0' && c <= '9')
+    c = (current_ = p) < end_ ? *p++ : '\0';
+  // fractional part
+  if (c == '.') {
+    c = (current_ = p) < end_ ? *p++ : '\0';
+    while (c >= '0' && c <= '9')
+      c = (current_ = p) < end_ ? *p++ : '\0';
+  }
+  // exponential part
+  if (c == 'e' || c == 'E') {
+    c = (current_ = p) < end_ ? *p++ : '\0';
+    if (c == '+' || c == '-')
+      c = (current_ = p) < end_ ? *p++ : '\0';
+    while (c >= '0' && c <= '9')
+      c = (current_ = p) < end_ ? *p++ : '\0';
+  }
+  return true;
+}
+bool OurReader::readString() {
+  Char c = 0;
+  while (current_ != end_) {
+    c = getNextChar();
+    if (c == '\\')
+      getNextChar();
+    else if (c == '"')
+      break;
+  }
+  return c == '"';
+}
+
+bool OurReader::readStringSingleQuote() {
+  Char c = 0;
+  while (current_ != end_) {
+    c = getNextChar();
+    if (c == '\\')
+      getNextChar();
+    else if (c == '\'')
+      break;
+  }
+  return c == '\'';
+}
+
+bool OurReader::readObject(Token& token) {
+  Token tokenName;
+  String name;
+  Value init(objectValue);
+  currentValue().swapPayload(init);
+  currentValue().setOffsetStart(token.start_ - begin_);
+  while (readToken(tokenName)) {
+    bool initialTokenOk = true;
+    while (tokenName.type_ == tokenComment && initialTokenOk)
+      initialTokenOk = readToken(tokenName);
+    if (!initialTokenOk)
+      break;
+    if (tokenName.type_ == tokenObjectEnd &&
+        (name.empty() ||
+         features_.allowTrailingCommas_)) // empty object or trailing comma
+      return true;
+    name.clear();
+    if (tokenName.type_ == tokenString) {
+      if (!decodeString(tokenName, name))
+        return recoverFromError(tokenObjectEnd);
+    } else if (tokenName.type_ == tokenNumber && features_.allowNumericKeys_) {
+      Value numberName;
+      if (!decodeNumber(tokenName, numberName))
+        return recoverFromError(tokenObjectEnd);
+      name = numberName.asString();
+    } else {
+      break;
+    }
+    if (name.length() >= (1U << 30))
+      throwRuntimeError("keylength >= 2^30");
+    if (features_.rejectDupKeys_ && currentValue().isMember(name)) {
+      String msg = "Duplicate key: '" + name + "'";
+      return addErrorAndRecover(msg, tokenName, tokenObjectEnd);
+    }
+
+    Token colon;
+    if (!readToken(colon) || colon.type_ != tokenMemberSeparator) {
+      return addErrorAndRecover("Missing ':' after object member name", colon,
+                                tokenObjectEnd);
+    }
+    Value& value = currentValue()[name];
+    nodes_.push(&value);
+    bool ok = readValue();
+    nodes_.pop();
+    if (!ok) // error already set
+      return recoverFromError(tokenObjectEnd);
+
+    Token comma;
+    if (!readToken(comma) ||
+        (comma.type_ != tokenObjectEnd && comma.type_ != tokenArraySeparator &&
+         comma.type_ != tokenComment)) {
+      return addErrorAndRecover("Missing ',' or '}' in object declaration",
+                                comma, tokenObjectEnd);
+    }
+    bool finalizeTokenOk = true;
+    while (comma.type_ == tokenComment && finalizeTokenOk)
+      finalizeTokenOk = readToken(comma);
+    if (comma.type_ == tokenObjectEnd)
+      return true;
+  }
+  return addErrorAndRecover("Missing '}' or object member name", tokenName,
+                            tokenObjectEnd);
+}
+
+bool OurReader::readArray(Token& token) {
+  Value init(arrayValue);
+  currentValue().swapPayload(init);
+  currentValue().setOffsetStart(token.start_ - begin_);
+  int index = 0;
+  for (;;) {
+    skipSpaces();
+    if (current_ != end_ && *current_ == ']' &&
+        (index == 0 ||
+         (features_.allowTrailingCommas_ &&
+          !features_.allowDroppedNullPlaceholders_))) // empty array or trailing
+                                                      // comma
+    {
+      Token endArray;
+      readToken(endArray);
+      return true;
+    }
+    Value& value = currentValue()[index++];
+    nodes_.push(&value);
+    bool ok = readValue();
+    nodes_.pop();
+    if (!ok) // error already set
+      return recoverFromError(tokenArrayEnd);
+
+    Token currentToken;
+    // Accept Comment after last item in the array.
+    ok = readToken(currentToken);
+    while (currentToken.type_ == tokenComment && ok) {
+      ok = readToken(currentToken);
+    }
+    bool badTokenType = (currentToken.type_ != tokenArraySeparator &&
+                         currentToken.type_ != tokenArrayEnd);
+    if (!ok || badTokenType) {
+      return addErrorAndRecover("Missing ',' or ']' in array declaration",
+                                currentToken, tokenArrayEnd);
+    }
+    if (currentToken.type_ == tokenArrayEnd)
+      break;
+  }
+  return true;
+}
+
+bool OurReader::decodeNumber(Token& token) {
+  Value decoded;
+  if (!decodeNumber(token, decoded))
+    return false;
+  currentValue().swapPayload(decoded);
+  currentValue().setOffsetStart(token.start_ - begin_);
+  currentValue().setOffsetLimit(token.end_ - begin_);
+  return true;
+}
+
+bool OurReader::decodeNumber(Token& token, Value& decoded) {
+  // Attempts to parse the number as an integer. If the number is
+  // larger than the maximum supported value of an integer then
+  // we decode the number as a double.
+  Location current = token.start_;
+  const bool isNegative = *current == '-';
+  if (isNegative) {
+    ++current;
+  }
+
+  // We assume we can represent the largest and smallest integer types as
+  // unsigned integers with separate sign. This is only true if they can fit
+  // into an unsigned integer.
+  static_assert(Value::maxLargestInt <= Value::maxLargestUInt,
+                "Int must be smaller than UInt");
+
+  // We need to convert minLargestInt into a positive number. The easiest way
+  // to do this conversion is to assume our "threshold" value of minLargestInt
+  // divided by 10 can fit in maxLargestInt when absolute valued. This should
+  // be a safe assumption.
+  static_assert(Value::minLargestInt <= -Value::maxLargestInt,
+                "The absolute value of minLargestInt must be greater than or "
+                "equal to maxLargestInt");
+  static_assert(Value::minLargestInt / 10 >= -Value::maxLargestInt,
+                "The absolute value of minLargestInt must be only 1 magnitude "
+                "larger than maxLargest Int");
+
+  static constexpr Value::LargestUInt positive_threshold =
+      Value::maxLargestUInt / 10;
+  static constexpr Value::UInt positive_last_digit = Value::maxLargestUInt % 10;
+
+  // For the negative values, we have to be more careful. Since typically
+  // -Value::minLargestInt will cause an overflow, we first divide by 10 and
+  // then take the inverse. This assumes that minLargestInt is only a single
+  // power of 10 different in magnitude, which we check above. For the last
+  // digit, we take the modulus before negating for the same reason.
+  static constexpr auto negative_threshold =
+      Value::LargestUInt(-(Value::minLargestInt / 10));
+  static constexpr auto negative_last_digit =
+      Value::UInt(-(Value::minLargestInt % 10));
+
+  const Value::LargestUInt threshold =
+      isNegative ? negative_threshold : positive_threshold;
+  const Value::UInt max_last_digit =
+      isNegative ? negative_last_digit : positive_last_digit;
+
+  Value::LargestUInt value = 0;
+  while (current < token.end_) {
+    Char c = *current++;
+    if (c < '0' || c > '9')
+      return decodeDouble(token, decoded);
+
+    const auto digit(static_cast<Value::UInt>(c - '0'));
+    if (value >= threshold) {
+      // We've hit or exceeded the max value divided by 10 (rounded down). If
+      // a) we've only just touched the limit, meaning value == threshold,
+      // b) this is the last digit, or
+      // c) it's small enough to fit in that rounding delta, we're okay.
+      // Otherwise treat this number as a double to avoid overflow.
+      if (value > threshold || current != token.end_ ||
+          digit > max_last_digit) {
+        return decodeDouble(token, decoded);
+      }
+    }
+    value = value * 10 + digit;
+  }
+
+  if (isNegative) {
+    // We use the same magnitude assumption here, just in case.
+    const auto last_digit = static_cast<Value::UInt>(value % 10);
+    decoded = -Value::LargestInt(value / 10) * 10 - last_digit;
+  } else if (value <= Value::LargestUInt(Value::maxLargestInt)) {
+    decoded = Value::LargestInt(value);
+  } else {
+    decoded = value;
+  }
+
+  return true;
+}
+
+bool OurReader::decodeDouble(Token& token) {
+  Value decoded;
+  if (!decodeDouble(token, decoded))
+    return false;
+  currentValue().swapPayload(decoded);
+  currentValue().setOffsetStart(token.start_ - begin_);
+  currentValue().setOffsetLimit(token.end_ - begin_);
+  return true;
+}
+
+bool OurReader::decodeDouble(Token& token, Value& decoded) {
+  double value = 0;
+  const String buffer(token.start_, token.end_);
+  IStringStream is(buffer);
+  if (!(is >> value)) {
+    if (value == std::numeric_limits<double>::max())
+      value = std::numeric_limits<double>::infinity();
+    else if (value == std::numeric_limits<double>::lowest())
+      value = -std::numeric_limits<double>::infinity();
+    else if (!std::isinf(value))
+      return addError(
+        "'" + String(token.start_, token.end_) + "' is not a number.", token);
+  }
+  decoded = value;
+  return true;
+}
+
+bool OurReader::decodeString(Token& token) {
+  String decoded_string;
+  if (!decodeString(token, decoded_string))
+    return false;
+  Value decoded(decoded_string);
+  currentValue().swapPayload(decoded);
+  currentValue().setOffsetStart(token.start_ - begin_);
+  currentValue().setOffsetLimit(token.end_ - begin_);
+  return true;
+}
+
+bool OurReader::decodeString(Token& token, String& decoded) {
+  decoded.reserve(static_cast<size_t>(token.end_ - token.start_ - 2));
+  Location current = token.start_ + 1; // skip '"'
+  Location end = token.end_ - 1;       // do not include '"'
+  while (current != end) {
+    Char c = *current++;
+    if (c == '"')
+      break;
+    if (c == '\\') {
+      if (current == end)
+        return addError("Empty escape sequence in string", token, current);
+      Char escape = *current++;
+      switch (escape) {
+      case '"':
+        decoded += '"';
+        break;
+      case '/':
+        decoded += '/';
+        break;
+      case '\\':
+        decoded += '\\';
+        break;
+      case 'b':
+        decoded += '\b';
+        break;
+      case 'f':
+        decoded += '\f';
+        break;
+      case 'n':
+        decoded += '\n';
+        break;
+      case 'r':
+        decoded += '\r';
+        break;
+      case 't':
+        decoded += '\t';
+        break;
+      case 'u': {
+        unsigned int unicode;
+        if (!decodeUnicodeCodePoint(token, current, end, unicode))
+          return false;
+        decoded += codePointToUTF8(unicode);
+      } break;
+      default:
+        return addError("Bad escape sequence in string", token, current);
+      }
+    } else {
+      decoded += c;
+    }
+  }
+  return true;
+}
+
+bool OurReader::decodeUnicodeCodePoint(Token& token, Location& current,
+                                       Location end, unsigned int& unicode) {
+
+  if (!decodeUnicodeEscapeSequence(token, current, end, unicode))
+    return false;
+  if (unicode >= 0xD800 && unicode <= 0xDBFF) {
+    // surrogate pairs
+    if (end - current < 6)
+      return addError(
+          "additional six characters expected to parse unicode surrogate pair.",
+          token, current);
+    if (*(current++) == '\\' && *(current++) == 'u') {
+      unsigned int surrogatePair;
+      if (decodeUnicodeEscapeSequence(token, current, end, surrogatePair)) {
+        unicode = 0x10000 + ((unicode & 0x3FF) << 10) + (surrogatePair & 0x3FF);
+      } else
+        return false;
+    } else
+      return addError("expecting another \\u token to begin the second half of "
+                      "a unicode surrogate pair",
+                      token, current);
+  }
+  return true;
+}
+
+bool OurReader::decodeUnicodeEscapeSequence(Token& token, Location& current,
+                                            Location end,
+                                            unsigned int& ret_unicode) {
+  if (end - current < 4)
+    return addError(
+        "Bad unicode escape sequence in string: four digits expected.", token,
+        current);
+  int unicode = 0;
+  for (int index = 0; index < 4; ++index) {
+    Char c = *current++;
+    unicode *= 16;
+    if (c >= '0' && c <= '9')
+      unicode += c - '0';
+    else if (c >= 'a' && c <= 'f')
+      unicode += c - 'a' + 10;
+    else if (c >= 'A' && c <= 'F')
+      unicode += c - 'A' + 10;
+    else
+      return addError(
+          "Bad unicode escape sequence in string: hexadecimal digit expected.",
+          token, current);
+  }
+  ret_unicode = static_cast<unsigned int>(unicode);
+  return true;
+}
+
+bool OurReader::addError(const String& message, Token& token, Location extra) {
+  ErrorInfo info;
+  info.token_ = token;
+  info.message_ = message;
+  info.extra_ = extra;
+  errors_.push_back(info);
+  return false;
+}
+
+bool OurReader::recoverFromError(TokenType skipUntilToken) {
+  size_t errorCount = errors_.size();
+  Token skip;
+  for (;;) {
+    if (!readToken(skip))
+      errors_.resize(errorCount); // discard errors caused by recovery
+    if (skip.type_ == skipUntilToken || skip.type_ == tokenEndOfStream)
+      break;
+  }
+  errors_.resize(errorCount);
+  return false;
+}
+
+bool OurReader::addErrorAndRecover(const String& message, Token& token,
+                                   TokenType skipUntilToken) {
+  addError(message, token);
+  return recoverFromError(skipUntilToken);
+}
+
+Value& OurReader::currentValue() { return *(nodes_.top()); }
+
+OurReader::Char OurReader::getNextChar() {
+  if (current_ == end_)
+    return 0;
+  return *current_++;
+}
+
+void OurReader::getLocationLineAndColumn(Location location, int& line,
+                                         int& column) const {
+  Location current = begin_;
+  Location lastLineStart = current;
+  line = 0;
+  while (current < location && current != end_) {
+    Char c = *current++;
+    if (c == '\r') {
+      if (*current == '\n')
+        ++current;
+      lastLineStart = current;
+      ++line;
+    } else if (c == '\n') {
+      lastLineStart = current;
+      ++line;
+    }
+  }
+  // column & line start at 1
+  column = int(location - lastLineStart) + 1;
+  ++line;
+}
+
+String OurReader::getLocationLineAndColumn(Location location) const {
+  int line, column;
+  getLocationLineAndColumn(location, line, column);
+  char buffer[18 + 16 + 16 + 1];
+  jsoncpp_snprintf(buffer, sizeof(buffer), "Line %d, Column %d", line, column);
+  return buffer;
+}
+
+String OurReader::getFormattedErrorMessages() const {
+  String formattedMessage;
+  for (const auto& error : errors_) {
+    formattedMessage +=
+        "* " + getLocationLineAndColumn(error.token_.start_) + "\n";
+    formattedMessage += "  " + error.message_ + "\n";
+    if (error.extra_)
+      formattedMessage +=
+          "See " + getLocationLineAndColumn(error.extra_) + " for detail.\n";
+  }
+  return formattedMessage;
+}
+
+std::vector<OurReader::StructuredError> OurReader::getStructuredErrors() const {
+  std::vector<OurReader::StructuredError> allErrors;
+  for (const auto& error : errors_) {
+    OurReader::StructuredError structured;
+    structured.offset_start = error.token_.start_ - begin_;
+    structured.offset_limit = error.token_.end_ - begin_;
+    structured.message = error.message_;
+    allErrors.push_back(structured);
+  }
+  return allErrors;
+}
+
+class OurCharReader : public CharReader {
+  bool const collectComments_;
+  OurReader reader_;
+
+public:
+  OurCharReader(bool collectComments, OurFeatures const& features)
+      : collectComments_(collectComments), reader_(features) {}
+  bool parse(char const* beginDoc, char const* endDoc, Value* root,
+             String* errs) override {
+    bool ok = reader_.parse(beginDoc, endDoc, *root, collectComments_);
+    if (errs) {
+      *errs = reader_.getFormattedErrorMessages();
+    }
+    return ok;
+  }
+};
+
+CharReaderBuilder::CharReaderBuilder() { setDefaults(&settings_); }
+CharReaderBuilder::~CharReaderBuilder() = default;
+CharReader* CharReaderBuilder::newCharReader() const {
+  bool collectComments = settings_["collectComments"].asBool();
+  OurFeatures features = OurFeatures::all();
+  features.allowComments_ = settings_["allowComments"].asBool();
+  features.allowTrailingCommas_ = settings_["allowTrailingCommas"].asBool();
+  features.strictRoot_ = settings_["strictRoot"].asBool();
+  features.allowDroppedNullPlaceholders_ =
+      settings_["allowDroppedNullPlaceholders"].asBool();
+  features.allowNumericKeys_ = settings_["allowNumericKeys"].asBool();
+  features.allowSingleQuotes_ = settings_["allowSingleQuotes"].asBool();
+
+  // Stack limit is always a size_t, so we get this as an unsigned int
+  // regardless of it we have 64-bit integer support enabled.
+  features.stackLimit_ = static_cast<size_t>(settings_["stackLimit"].asUInt());
+  features.failIfExtra_ = settings_["failIfExtra"].asBool();
+  features.rejectDupKeys_ = settings_["rejectDupKeys"].asBool();
+  features.allowSpecialFloats_ = settings_["allowSpecialFloats"].asBool();
+  features.skipBom_ = settings_["skipBom"].asBool();
+  return new OurCharReader(collectComments, features);
+}
+
+bool CharReaderBuilder::validate(Json::Value* invalid) const {
+  static const auto& valid_keys = *new std::set<String>{
+      "collectComments",
+      "allowComments",
+      "allowTrailingCommas",
+      "strictRoot",
+      "allowDroppedNullPlaceholders",
+      "allowNumericKeys",
+      "allowSingleQuotes",
+      "stackLimit",
+      "failIfExtra",
+      "rejectDupKeys",
+      "allowSpecialFloats",
+      "skipBom",
+  };
+  for (auto si = settings_.begin(); si != settings_.end(); ++si) {
+    auto key = si.name();
+    if (valid_keys.count(key))
+      continue;
+    if (invalid)
+      (*invalid)[key] = *si;
+    else
+      return false;
+  }
+  return invalid ? invalid->empty() : true;
+}
+
+Value& CharReaderBuilder::operator[](const String& key) {
+  return settings_[key];
+}
+// static
+void CharReaderBuilder::strictMode(Json::Value* settings) {
+  //! [CharReaderBuilderStrictMode]
+  (*settings)["allowComments"] = false;
+  (*settings)["allowTrailingCommas"] = false;
+  (*settings)["strictRoot"] = true;
+  (*settings)["allowDroppedNullPlaceholders"] = false;
+  (*settings)["allowNumericKeys"] = false;
+  (*settings)["allowSingleQuotes"] = false;
+  (*settings)["stackLimit"] = 1000;
+  (*settings)["failIfExtra"] = true;
+  (*settings)["rejectDupKeys"] = true;
+  (*settings)["allowSpecialFloats"] = false;
+  (*settings)["skipBom"] = true;
+  //! [CharReaderBuilderStrictMode]
+}
+// static
+void CharReaderBuilder::setDefaults(Json::Value* settings) {
+  //! [CharReaderBuilderDefaults]
+  (*settings)["collectComments"] = true;
+  (*settings)["allowComments"] = true;
+  (*settings)["allowTrailingCommas"] = true;
+  (*settings)["strictRoot"] = false;
+  (*settings)["allowDroppedNullPlaceholders"] = false;
+  (*settings)["allowNumericKeys"] = false;
+  (*settings)["allowSingleQuotes"] = false;
+  (*settings)["stackLimit"] = 1000;
+  (*settings)["failIfExtra"] = false;
+  (*settings)["rejectDupKeys"] = false;
+  (*settings)["allowSpecialFloats"] = false;
+  (*settings)["skipBom"] = true;
+  //! [CharReaderBuilderDefaults]
+}
+
+//////////////////////////////////
+// global functions
+
+bool parseFromStream(CharReader::Factory const& fact, IStream& sin, Value* root,
+                     String* errs) {
+  OStringStream ssin;
+  ssin << sin.rdbuf();
+  String doc = ssin.str();
+  char const* begin = doc.data();
+  char const* end = begin + doc.size();
+  // Note that we do not actually need a null-terminator.
+  CharReaderPtr const reader(fact.newCharReader());
+  return reader->parse(begin, end, root, errs);
+}
+
+IStream& operator>>(IStream& sin, Value& root) {
+  CharReaderBuilder b;
+  String errs;
+  bool ok = parseFromStream(b, sin, &root, &errs);
+  if (!ok) {
+    throwRuntimeError(errs);
+  }
+  return sin;
+}
+
+} // namespace Json
+
+// //////////////////////////////////////////////////////////////////////
+// End of content of file: src/lib_json/json_reader.cpp
+// //////////////////////////////////////////////////////////////////////
+
+
+
+
+
+
+// //////////////////////////////////////////////////////////////////////
+// Beginning of content of file: src/lib_json/json_valueiterator.inl
+// //////////////////////////////////////////////////////////////////////
+
+// Copyright 2007-2010 Baptiste Lepilleur and The JsonCpp Authors
+// Distributed under MIT license, or public domain if desired and
+// recognized in your jurisdiction.
+// See file LICENSE for detail or copy at http://jsoncpp.sourceforge.net/LICENSE
+
+// included by json_value.cpp
+
+namespace Json {
+
+// //////////////////////////////////////////////////////////////////
+// //////////////////////////////////////////////////////////////////
+// //////////////////////////////////////////////////////////////////
+// class ValueIteratorBase
+// //////////////////////////////////////////////////////////////////
+// //////////////////////////////////////////////////////////////////
+// //////////////////////////////////////////////////////////////////
+
+ValueIteratorBase::ValueIteratorBase() : current_() {}
+
+ValueIteratorBase::ValueIteratorBase(
+    const Value::ObjectValues::iterator& current)
+    : current_(current), isNull_(false) {}
+
+Value& ValueIteratorBase::deref() { return current_->second; }
+const Value& ValueIteratorBase::deref() const { return current_->second; }
+
+void ValueIteratorBase::increment() { ++current_; }
+
+void ValueIteratorBase::decrement() { --current_; }
+
+ValueIteratorBase::difference_type
+ValueIteratorBase::computeDistance(const SelfType& other) const {
+  // Iterator for null value are initialized using the default
+  // constructor, which initialize current_ to the default
+  // std::map::iterator. As begin() and end() are two instance
+  // of the default std::map::iterator, they can not be compared.
+  // To allow this, we handle this comparison specifically.
+  if (isNull_ && other.isNull_) {
+    return 0;
+  }
+
+  // Usage of std::distance is not portable (does not compile with Sun Studio 12
+  // RogueWave STL,
+  // which is the one used by default).
+  // Using a portable hand-made version for non random iterator instead:
+  //   return difference_type( std::distance( current_, other.current_ ) );
+  difference_type myDistance = 0;
+  for (Value::ObjectValues::iterator it = current_; it != other.current_;
+       ++it) {
+    ++myDistance;
+  }
+  return myDistance;
+}
+
+bool ValueIteratorBase::isEqual(const SelfType& other) const {
+  if (isNull_) {
+    return other.isNull_;
+  }
+  return current_ == other.current_;
+}
+
+void ValueIteratorBase::copy(const SelfType& other) {
+  current_ = other.current_;
+  isNull_ = other.isNull_;
+}
+
+Value ValueIteratorBase::key() const {
+  const Value::CZString czstring = (*current_).first;
+  if (czstring.data()) {
+    if (czstring.isStaticString())
+      return Value(StaticString(czstring.data()));
+    return Value(czstring.data(), czstring.data() + czstring.length());
+  }
+  return Value(czstring.index());
+}
+
+UInt ValueIteratorBase::index() const {
+  const Value::CZString czstring = (*current_).first;
+  if (!czstring.data())
+    return czstring.index();
+  return Value::UInt(-1);
+}
+
+String ValueIteratorBase::name() const {
+  char const* keey;
+  char const* end;
+  keey = memberName(&end);
+  if (!keey)
+    return String();
+  return String(keey, end);
+}
+
+char const* ValueIteratorBase::memberName() const {
+  const char* cname = (*current_).first.data();
+  return cname ? cname : "";
+}
+
+char const* ValueIteratorBase::memberName(char const** end) const {
+  const char* cname = (*current_).first.data();
+  if (!cname) {
+    *end = nullptr;
+    return nullptr;
+  }
+  *end = cname + (*current_).first.length();
+  return cname;
+}
+
+// //////////////////////////////////////////////////////////////////
+// //////////////////////////////////////////////////////////////////
+// //////////////////////////////////////////////////////////////////
+// class ValueConstIterator
+// //////////////////////////////////////////////////////////////////
+// //////////////////////////////////////////////////////////////////
+// //////////////////////////////////////////////////////////////////
+
+ValueConstIterator::ValueConstIterator() = default;
+
+ValueConstIterator::ValueConstIterator(
+    const Value::ObjectValues::iterator& current)
+    : ValueIteratorBase(current) {}
+
+ValueConstIterator::ValueConstIterator(ValueIterator const& other)
+    : ValueIteratorBase(other) {}
+
+ValueConstIterator& ValueConstIterator::
+operator=(const ValueIteratorBase& other) {
+  copy(other);
+  return *this;
+}
+
+// //////////////////////////////////////////////////////////////////
+// //////////////////////////////////////////////////////////////////
+// //////////////////////////////////////////////////////////////////
+// class ValueIterator
+// //////////////////////////////////////////////////////////////////
+// //////////////////////////////////////////////////////////////////
+// //////////////////////////////////////////////////////////////////
+
+ValueIterator::ValueIterator() = default;
+
+ValueIterator::ValueIterator(const Value::ObjectValues::iterator& current)
+    : ValueIteratorBase(current) {}
+
+ValueIterator::ValueIterator(const ValueConstIterator& other)
+    : ValueIteratorBase(other) {
+  throwRuntimeError("ConstIterator to Iterator should never be allowed.");
+}
+
+ValueIterator::ValueIterator(const ValueIterator& other) = default;
+
+ValueIterator& ValueIterator::operator=(const SelfType& other) {
+  copy(other);
+  return *this;
+}
+
+} // namespace Json
+
+// //////////////////////////////////////////////////////////////////////
+// End of content of file: src/lib_json/json_valueiterator.inl
+// //////////////////////////////////////////////////////////////////////
+
+
+
+
+
+
+// //////////////////////////////////////////////////////////////////////
+// Beginning of content of file: src/lib_json/json_value.cpp
+// //////////////////////////////////////////////////////////////////////
+
+// Copyright 2011 Baptiste Lepilleur and The JsonCpp Authors
+// Distributed under MIT license, or public domain if desired and
+// recognized in your jurisdiction.
+// See file LICENSE for detail or copy at http://jsoncpp.sourceforge.net/LICENSE
+
+#if !defined(JSON_IS_AMALGAMATION)
+#include <json/assertions.h>
+#include <json/value.h>
+#include <json/writer.h>
+#endif // if !defined(JSON_IS_AMALGAMATION)
+#include <algorithm>
+#include <cassert>
+#include <cmath>
+#include <cstddef>
+#include <cstring>
+#include <iostream>
+#include <sstream>
+#include <utility>
+
+// Provide implementation equivalent of std::snprintf for older _MSC compilers
+#if defined(_MSC_VER) && _MSC_VER < 1900
+#include <stdarg.h>
+static int msvc_pre1900_c99_vsnprintf(char* outBuf, size_t size,
+                                      const char* format, va_list ap) {
+  int count = -1;
+  if (size != 0)
+    count = _vsnprintf_s(outBuf, size, _TRUNCATE, format, ap);
+  if (count == -1)
+    count = _vscprintf(format, ap);
+  return count;
+}
+
+int JSON_API msvc_pre1900_c99_snprintf(char* outBuf, size_t size,
+                                       const char* format, ...) {
+  va_list ap;
+  va_start(ap, format);
+  const int count = msvc_pre1900_c99_vsnprintf(outBuf, size, format, ap);
+  va_end(ap);
+  return count;
+}
+#endif
+
+// Disable warning C4702 : unreachable code
+#if defined(_MSC_VER)
+#pragma warning(disable : 4702)
+#endif
+
+#define JSON_ASSERT_UNREACHABLE assert(false)
+
+namespace Json {
+template <typename T>
+static std::unique_ptr<T> cloneUnique(const std::unique_ptr<T>& p) {
+  std::unique_ptr<T> r;
+  if (p) {
+    r = std::unique_ptr<T>(new T(*p));
+  }
+  return r;
+}
+
+// This is a walkaround to avoid the static initialization of Value::null.
+// kNull must be word-aligned to avoid crashing on ARM.  We use an alignment of
+// 8 (instead of 4) as a bit of future-proofing.
+#if defined(__ARMEL__)
+#define ALIGNAS(byte_alignment) __attribute__((aligned(byte_alignment)))
+#else
+#define ALIGNAS(byte_alignment)
+#endif
+
+// static
+Value const& Value::nullSingleton() {
+  static Value const nullStatic;
+  return nullStatic;
+}
+
+#if JSON_USE_NULLREF
+// for backwards compatibility, we'll leave these global references around, but
+// DO NOT use them in JSONCPP library code any more!
+// static
+Value const& Value::null = Value::nullSingleton();
+
+// static
+Value const& Value::nullRef = Value::nullSingleton();
+#endif
+
+#if !defined(JSON_USE_INT64_DOUBLE_CONVERSION)
+template <typename T, typename U>
+static inline bool InRange(double d, T min, U max) {
+  // The casts can lose precision, but we are looking only for
+  // an approximate range. Might fail on edge cases though. ~cdunn
+  return d >= static_cast<double>(min) && d <= static_cast<double>(max);
+}
+#else  // if !defined(JSON_USE_INT64_DOUBLE_CONVERSION)
+static inline double integerToDouble(Json::UInt64 value) {
+  return static_cast<double>(Int64(value / 2)) * 2.0 +
+         static_cast<double>(Int64(value & 1));
+}
+
+template <typename T> static inline double integerToDouble(T value) {
+  return static_cast<double>(value);
+}
+
+template <typename T, typename U>
+static inline bool InRange(double d, T min, U max) {
+  return d >= integerToDouble(min) && d <= integerToDouble(max);
+}
+#endif // if !defined(JSON_USE_INT64_DOUBLE_CONVERSION)
+
+/** Duplicates the specified string value.
+ * @param value Pointer to the string to duplicate. Must be zero-terminated if
+ *              length is "unknown".
+ * @param length Length of the value. if equals to unknown, then it will be
+ *               computed using strlen(value).
+ * @return Pointer on the duplicate instance of string.
+ */
+static inline char* duplicateStringValue(const char* value, size_t length) {
+  // Avoid an integer overflow in the call to malloc below by limiting length
+  // to a sane value.
+  if (length >= static_cast<size_t>(Value::maxInt))
+    length = Value::maxInt - 1;
+
+  auto newString = static_cast<char*>(malloc(length + 1));
+  if (newString == nullptr) {
+    throwRuntimeError("in Json::Value::duplicateStringValue(): "
+                      "Failed to allocate string value buffer");
+  }
+  memcpy(newString, value, length);
+  newString[length] = 0;
+  return newString;
+}
+
+/* Record the length as a prefix.
+ */
+static inline char* duplicateAndPrefixStringValue(const char* value,
+                                                  unsigned int length) {
+  // Avoid an integer overflow in the call to malloc below by limiting length
+  // to a sane value.
+  JSON_ASSERT_MESSAGE(length <= static_cast<unsigned>(Value::maxInt) -
+                                    sizeof(unsigned) - 1U,
+                      "in Json::Value::duplicateAndPrefixStringValue(): "
+                      "length too big for prefixing");
+  size_t actualLength = sizeof(length) + length + 1;
+  auto newString = static_cast<char*>(malloc(actualLength));
+  if (newString == nullptr) {
+    throwRuntimeError("in Json::Value::duplicateAndPrefixStringValue(): "
+                      "Failed to allocate string value buffer");
+  }
+  *reinterpret_cast<unsigned*>(newString) = length;
+  memcpy(newString + sizeof(unsigned), value, length);
+  newString[actualLength - 1U] =
+      0; // to avoid buffer over-run accidents by users later
+  return newString;
+}
+inline static void decodePrefixedString(bool isPrefixed, char const* prefixed,
+                                        unsigned* length, char const** value) {
+  if (!isPrefixed) {
+    *length = static_cast<unsigned>(strlen(prefixed));
+    *value = prefixed;
+  } else {
+    *length = *reinterpret_cast<unsigned const*>(prefixed);
+    *value = prefixed + sizeof(unsigned);
+  }
+}
+/** Free the string duplicated by
+ * duplicateStringValue()/duplicateAndPrefixStringValue().
+ */
+#if JSONCPP_USING_SECURE_MEMORY
+static inline void releasePrefixedStringValue(char* value) {
+  unsigned length = 0;
+  char const* valueDecoded;
+  decodePrefixedString(true, value, &length, &valueDecoded);
+  size_t const size = sizeof(unsigned) + length + 1U;
+  memset(value, 0, size);
+  free(value);
+}
+static inline void releaseStringValue(char* value, unsigned length) {
+  // length==0 => we allocated the strings memory
+  size_t size = (length == 0) ? strlen(value) : length;
+  memset(value, 0, size);
+  free(value);
+}
+#else  // !JSONCPP_USING_SECURE_MEMORY
+static inline void releasePrefixedStringValue(char* value) { free(value); }
+static inline void releaseStringValue(char* value, unsigned) { free(value); }
+#endif // JSONCPP_USING_SECURE_MEMORY
+
+} // namespace Json
+
+// //////////////////////////////////////////////////////////////////
+// //////////////////////////////////////////////////////////////////
+// //////////////////////////////////////////////////////////////////
+// ValueInternals...
+// //////////////////////////////////////////////////////////////////
+// //////////////////////////////////////////////////////////////////
+// //////////////////////////////////////////////////////////////////
+#if !defined(JSON_IS_AMALGAMATION)
+
+#include "json_valueiterator.inl"
+#endif // if !defined(JSON_IS_AMALGAMATION)
+
+namespace Json {
+
+#if JSON_USE_EXCEPTION
+Exception::Exception(String msg) : msg_(std::move(msg)) {}
+Exception::~Exception() noexcept = default;
+char const* Exception::what() const noexcept { return msg_.c_str(); }
+RuntimeError::RuntimeError(String const& msg) : Exception(msg) {}
+LogicError::LogicError(String const& msg) : Exception(msg) {}
+JSONCPP_NORETURN void throwRuntimeError(String const& msg) {
+  throw RuntimeError(msg);
+}
+JSONCPP_NORETURN void throwLogicError(String const& msg) {
+  throw LogicError(msg);
+}
+#else // !JSON_USE_EXCEPTION
+JSONCPP_NORETURN void throwRuntimeError(String const& msg) {
+  std::cerr << msg << std::endl;
+  abort();
+}
+JSONCPP_NORETURN void throwLogicError(String const& msg) {
+  std::cerr << msg << std::endl;
+  abort();
+}
+#endif
+
+// //////////////////////////////////////////////////////////////////
+// //////////////////////////////////////////////////////////////////
+// //////////////////////////////////////////////////////////////////
+// class Value::CZString
+// //////////////////////////////////////////////////////////////////
+// //////////////////////////////////////////////////////////////////
+// //////////////////////////////////////////////////////////////////
+
+// Notes: policy_ indicates if the string was allocated when
+// a string is stored.
+
+Value::CZString::CZString(ArrayIndex index) : cstr_(nullptr), index_(index) {}
+
+Value::CZString::CZString(char const* str, unsigned length,
+                          DuplicationPolicy allocate)
+    : cstr_(str) {
+  // allocate != duplicate
+  storage_.policy_ = allocate & 0x3;
+  storage_.length_ = length & 0x3FFFFFFF;
+}
+
+Value::CZString::CZString(const CZString& other) {
+  cstr_ = (other.storage_.policy_ != noDuplication && other.cstr_ != nullptr
+               ? duplicateStringValue(other.cstr_, other.storage_.length_)
+               : other.cstr_);
+  storage_.policy_ =
+      static_cast<unsigned>(
+          other.cstr_
+              ? (static_cast<DuplicationPolicy>(other.storage_.policy_) ==
+                         noDuplication
+                     ? noDuplication
+                     : duplicate)
+              : static_cast<DuplicationPolicy>(other.storage_.policy_)) &
+      3U;
+  storage_.length_ = other.storage_.length_;
+}
+
+Value::CZString::CZString(CZString&& other) noexcept
+    : cstr_(other.cstr_), index_(other.index_) {
+  other.cstr_ = nullptr;
+}
+
+Value::CZString::~CZString() {
+  if (cstr_ && storage_.policy_ == duplicate) {
+    releaseStringValue(const_cast<char*>(cstr_),
+                       storage_.length_ + 1U); // +1 for null terminating
+                                               // character for sake of
+                                               // completeness but not actually
+                                               // necessary
+  }
+}
+
+void Value::CZString::swap(CZString& other) {
+  std::swap(cstr_, other.cstr_);
+  std::swap(index_, other.index_);
+}
+
+Value::CZString& Value::CZString::operator=(const CZString& other) {
+  cstr_ = other.cstr_;
+  index_ = other.index_;
+  return *this;
+}
+
+Value::CZString& Value::CZString::operator=(CZString&& other) noexcept {
+  cstr_ = other.cstr_;
+  index_ = other.index_;
+  other.cstr_ = nullptr;
+  return *this;
+}
+
+bool Value::CZString::operator<(const CZString& other) const {
+  if (!cstr_)
+    return index_ < other.index_;
+  // return strcmp(cstr_, other.cstr_) < 0;
+  // Assume both are strings.
+  unsigned this_len = this->storage_.length_;
+  unsigned other_len = other.storage_.length_;
+  unsigned min_len = std::min<unsigned>(this_len, other_len);
+  JSON_ASSERT(this->cstr_ && other.cstr_);
+  int comp = memcmp(this->cstr_, other.cstr_, min_len);
+  if (comp < 0)
+    return true;
+  if (comp > 0)
+    return false;
+  return (this_len < other_len);
+}
+
+bool Value::CZString::operator==(const CZString& other) const {
+  if (!cstr_)
+    return index_ == other.index_;
+  // return strcmp(cstr_, other.cstr_) == 0;
+  // Assume both are strings.
+  unsigned this_len = this->storage_.length_;
+  unsigned other_len = other.storage_.length_;
+  if (this_len != other_len)
+    return false;
+  JSON_ASSERT(this->cstr_ && other.cstr_);
+  int comp = memcmp(this->cstr_, other.cstr_, this_len);
+  return comp == 0;
+}
+
+ArrayIndex Value::CZString::index() const { return index_; }
+
+// const char* Value::CZString::c_str() const { return cstr_; }
+const char* Value::CZString::data() const { return cstr_; }
+unsigned Value::CZString::length() const { return storage_.length_; }
+bool Value::CZString::isStaticString() const {
+  return storage_.policy_ == noDuplication;
+}
+
+// //////////////////////////////////////////////////////////////////
+// //////////////////////////////////////////////////////////////////
+// //////////////////////////////////////////////////////////////////
+// class Value::Value
+// //////////////////////////////////////////////////////////////////
+// //////////////////////////////////////////////////////////////////
+// //////////////////////////////////////////////////////////////////
+
+/*! \internal Default constructor initialization must be equivalent to:
+ * memset( this, 0, sizeof(Value) )
+ * This optimization is used in ValueInternalMap fast allocator.
+ */
+Value::Value(ValueType type) {
+  static char const emptyString[] = "";
+  initBasic(type);
+  switch (type) {
+  case nullValue:
+    break;
+  case intValue:
+  case uintValue:
+    value_.int_ = 0;
+    break;
+  case realValue:
+    value_.real_ = 0.0;
+    break;
+  case stringValue:
+    // allocated_ == false, so this is safe.
+    value_.string_ = const_cast<char*>(static_cast<char const*>(emptyString));
+    break;
+  case arrayValue:
+  case objectValue:
+    value_.map_ = new ObjectValues();
+    break;
+  case booleanValue:
+    value_.bool_ = false;
+    break;
+  default:
+    JSON_ASSERT_UNREACHABLE;
+  }
+}
+
+Value::Value(Int value) {
+  initBasic(intValue);
+  value_.int_ = value;
+}
+
+Value::Value(UInt value) {
+  initBasic(uintValue);
+  value_.uint_ = value;
+}
+#if defined(JSON_HAS_INT64)
+Value::Value(Int64 value) {
+  initBasic(intValue);
+  value_.int_ = value;
+}
+Value::Value(UInt64 value) {
+  initBasic(uintValue);
+  value_.uint_ = value;
+}
+#endif // defined(JSON_HAS_INT64)
+
+Value::Value(double value) {
+  initBasic(realValue);
+  value_.real_ = value;
+}
+
+Value::Value(const char* value) {
+  initBasic(stringValue, true);
+  JSON_ASSERT_MESSAGE(value != nullptr,
+                      "Null Value Passed to Value Constructor");
+  value_.string_ = duplicateAndPrefixStringValue(
+      value, static_cast<unsigned>(strlen(value)));
+}
+
+Value::Value(const char* begin, const char* end) {
+  initBasic(stringValue, true);
+  value_.string_ =
+      duplicateAndPrefixStringValue(begin, static_cast<unsigned>(end - begin));
+}
+
+Value::Value(const String& value) {
+  initBasic(stringValue, true);
+  value_.string_ = duplicateAndPrefixStringValue(
+      value.data(), static_cast<unsigned>(value.length()));
+}
+
+Value::Value(const StaticString& value) {
+  initBasic(stringValue);
+  value_.string_ = const_cast<char*>(value.c_str());
+}
+
+Value::Value(bool value) {
+  initBasic(booleanValue);
+  value_.bool_ = value;
+}
+
+Value::Value(const Value& other) {
+  dupPayload(other);
+  dupMeta(other);
+}
+
+Value::Value(Value&& other) noexcept {
+  initBasic(nullValue);
+  swap(other);
+}
+
+Value::~Value() {
+  releasePayload();
+  value_.uint_ = 0;
+}
+
+Value& Value::operator=(const Value& other) {
+  Value(other).swap(*this);
+  return *this;
+}
+
+Value& Value::operator=(Value&& other) noexcept {
+  other.swap(*this);
+  return *this;
+}
+
+void Value::swapPayload(Value& other) {
+  std::swap(bits_, other.bits_);
+  std::swap(value_, other.value_);
+}
+
+void Value::copyPayload(const Value& other) {
+  releasePayload();
+  dupPayload(other);
+}
+
+void Value::swap(Value& other) {
+  swapPayload(other);
+  std::swap(comments_, other.comments_);
+  std::swap(start_, other.start_);
+  std::swap(limit_, other.limit_);
+}
+
+void Value::copy(const Value& other) {
+  copyPayload(other);
+  dupMeta(other);
+}
+
+ValueType Value::type() const {
+  return static_cast<ValueType>(bits_.value_type_);
+}
+
+int Value::compare(const Value& other) const {
+  if (*this < other)
+    return -1;
+  if (*this > other)
+    return 1;
+  return 0;
+}
+
+bool Value::operator<(const Value& other) const {
+  int typeDelta = type() - other.type();
+  if (typeDelta)
+    return typeDelta < 0;
+  switch (type()) {
+  case nullValue:
+    return false;
+  case intValue:
+    return value_.int_ < other.value_.int_;
+  case uintValue:
+    return value_.uint_ < other.value_.uint_;
+  case realValue:
+    return value_.real_ < other.value_.real_;
+  case booleanValue:
+    return value_.bool_ < other.value_.bool_;
+  case stringValue: {
+    if ((value_.string_ == nullptr) || (other.value_.string_ == nullptr)) {
+      return other.value_.string_ != nullptr;
+    }
+    unsigned this_len;
+    unsigned other_len;
+    char const* this_str;
+    char const* other_str;
+    decodePrefixedString(this->isAllocated(), this->value_.string_, &this_len,
+                         &this_str);
+    decodePrefixedString(other.isAllocated(), other.value_.string_, &other_len,
+                         &other_str);
+    unsigned min_len = std::min<unsigned>(this_len, other_len);
+    JSON_ASSERT(this_str && other_str);
+    int comp = memcmp(this_str, other_str, min_len);
+    if (comp < 0)
+      return true;
+    if (comp > 0)
+      return false;
+    return (this_len < other_len);
+  }
+  case arrayValue:
+  case objectValue: {
+    auto thisSize = value_.map_->size();
+    auto otherSize = other.value_.map_->size();
+    if (thisSize != otherSize)
+      return thisSize < otherSize;
+    return (*value_.map_) < (*other.value_.map_);
+  }
+  default:
+    JSON_ASSERT_UNREACHABLE;
+  }
+  return false; // unreachable
+}
+
+bool Value::operator<=(const Value& other) const { return !(other < *this); }
+
+bool Value::operator>=(const Value& other) const { return !(*this < other); }
+
+bool Value::operator>(const Value& other) const { return other < *this; }
+
+bool Value::operator==(const Value& other) const {
+  if (type() != other.type())
+    return false;
+  switch (type()) {
+  case nullValue:
+    return true;
+  case intValue:
+    return value_.int_ == other.value_.int_;
+  case uintValue:
+    return value_.uint_ == other.value_.uint_;
+  case realValue:
+    return value_.real_ == other.value_.real_;
+  case booleanValue:
+    return value_.bool_ == other.value_.bool_;
+  case stringValue: {
+    if ((value_.string_ == nullptr) || (other.value_.string_ == nullptr)) {
+      return (value_.string_ == other.value_.string_);
+    }
+    unsigned this_len;
+    unsigned other_len;
+    char const* this_str;
+    char const* other_str;
+    decodePrefixedString(this->isAllocated(), this->value_.string_, &this_len,
+                         &this_str);
+    decodePrefixedString(other.isAllocated(), other.value_.string_, &other_len,
+                         &other_str);
+    if (this_len != other_len)
+      return false;
+    JSON_ASSERT(this_str && other_str);
+    int comp = memcmp(this_str, other_str, this_len);
+    return comp == 0;
+  }
+  case arrayValue:
+  case objectValue:
+    return value_.map_->size() == other.value_.map_->size() &&
+           (*value_.map_) == (*other.value_.map_);
+  default:
+    JSON_ASSERT_UNREACHABLE;
+  }
+  return false; // unreachable
+}
+
+bool Value::operator!=(const Value& other) const { return !(*this == other); }
+
+const char* Value::asCString() const {
+  JSON_ASSERT_MESSAGE(type() == stringValue,
+                      "in Json::Value::asCString(): requires stringValue");
+  if (value_.string_ == nullptr)
+    return nullptr;
+  unsigned this_len;
+  char const* this_str;
+  decodePrefixedString(this->isAllocated(), this->value_.string_, &this_len,
+                       &this_str);
+  return this_str;
+}
+
+#if JSONCPP_USING_SECURE_MEMORY
+unsigned Value::getCStringLength() const {
+  JSON_ASSERT_MESSAGE(type() == stringValue,
+                      "in Json::Value::asCString(): requires stringValue");
+  if (value_.string_ == 0)
+    return 0;
+  unsigned this_len;
+  char const* this_str;
+  decodePrefixedString(this->isAllocated(), this->value_.string_, &this_len,
+                       &this_str);
+  return this_len;
+}
+#endif
+
+bool Value::getString(char const** begin, char const** end) const {
+  if (type() != stringValue)
+    return false;
+  if (value_.string_ == nullptr)
+    return false;
+  unsigned length;
+  decodePrefixedString(this->isAllocated(), this->value_.string_, &length,
+                       begin);
+  *end = *begin + length;
+  return true;
+}
+
+String Value::asString() const {
+  switch (type()) {
+  case nullValue:
+    return "";
+  case stringValue: {
+    if (value_.string_ == nullptr)
+      return "";
+    unsigned this_len;
+    char const* this_str;
+    decodePrefixedString(this->isAllocated(), this->value_.string_, &this_len,
+                         &this_str);
+    return String(this_str, this_len);
+  }
+  case booleanValue:
+    return value_.bool_ ? "true" : "false";
+  case intValue:
+    return valueToString(value_.int_);
+  case uintValue:
+    return valueToString(value_.uint_);
+  case realValue:
+    return valueToString(value_.real_);
+  default:
+    JSON_FAIL_MESSAGE("Type is not convertible to string");
+  }
+}
+
+Value::Int Value::asInt() const {
+  switch (type()) {
+  case intValue:
+    JSON_ASSERT_MESSAGE(isInt(), "LargestInt out of Int range");
+    return Int(value_.int_);
+  case uintValue:
+    JSON_ASSERT_MESSAGE(isInt(), "LargestUInt out of Int range");
+    return Int(value_.uint_);
+  case realValue:
+    JSON_ASSERT_MESSAGE(InRange(value_.real_, minInt, maxInt),
+                        "double out of Int range");
+    return Int(value_.real_);
+  case nullValue:
+    return 0;
+  case booleanValue:
+    return value_.bool_ ? 1 : 0;
+  default:
+    break;
+  }
+  JSON_FAIL_MESSAGE("Value is not convertible to Int.");
+}
+
+Value::UInt Value::asUInt() const {
+  switch (type()) {
+  case intValue:
+    JSON_ASSERT_MESSAGE(isUInt(), "LargestInt out of UInt range");
+    return UInt(value_.int_);
+  case uintValue:
+    JSON_ASSERT_MESSAGE(isUInt(), "LargestUInt out of UInt range");
+    return UInt(value_.uint_);
+  case realValue:
+    JSON_ASSERT_MESSAGE(InRange(value_.real_, 0, maxUInt),
+                        "double out of UInt range");
+    return UInt(value_.real_);
+  case nullValue:
+    return 0;
+  case booleanValue:
+    return value_.bool_ ? 1 : 0;
+  default:
+    break;
+  }
+  JSON_FAIL_MESSAGE("Value is not convertible to UInt.");
+}
+
+#if defined(JSON_HAS_INT64)
+
+Value::Int64 Value::asInt64() const {
+  switch (type()) {
+  case intValue:
+    return Int64(value_.int_);
+  case uintValue:
+    JSON_ASSERT_MESSAGE(isInt64(), "LargestUInt out of Int64 range");
+    return Int64(value_.uint_);
+  case realValue:
+    JSON_ASSERT_MESSAGE(InRange(value_.real_, minInt64, maxInt64),
+                        "double out of Int64 range");
+    return Int64(value_.real_);
+  case nullValue:
+    return 0;
+  case booleanValue:
+    return value_.bool_ ? 1 : 0;
+  default:
+    break;
+  }
+  JSON_FAIL_MESSAGE("Value is not convertible to Int64.");
+}
+
+Value::UInt64 Value::asUInt64() const {
+  switch (type()) {
+  case intValue:
+    JSON_ASSERT_MESSAGE(isUInt64(), "LargestInt out of UInt64 range");
+    return UInt64(value_.int_);
+  case uintValue:
+    return UInt64(value_.uint_);
+  case realValue:
+    JSON_ASSERT_MESSAGE(InRange(value_.real_, 0, maxUInt64),
+                        "double out of UInt64 range");
+    return UInt64(value_.real_);
+  case nullValue:
+    return 0;
+  case booleanValue:
+    return value_.bool_ ? 1 : 0;
+  default:
+    break;
+  }
+  JSON_FAIL_MESSAGE("Value is not convertible to UInt64.");
+}
+#endif // if defined(JSON_HAS_INT64)
+
+LargestInt Value::asLargestInt() const {
+#if defined(JSON_NO_INT64)
+  return asInt();
+#else
+  return asInt64();
+#endif
+}
+
+LargestUInt Value::asLargestUInt() const {
+#if defined(JSON_NO_INT64)
+  return asUInt();
+#else
+  return asUInt64();
+#endif
+}
+
+double Value::asDouble() const {
+  switch (type()) {
+  case intValue:
+    return static_cast<double>(value_.int_);
+  case uintValue:
+#if !defined(JSON_USE_INT64_DOUBLE_CONVERSION)
+    return static_cast<double>(value_.uint_);
+#else  // if !defined(JSON_USE_INT64_DOUBLE_CONVERSION)
+    return integerToDouble(value_.uint_);
+#endif // if !defined(JSON_USE_INT64_DOUBLE_CONVERSION)
+  case realValue:
+    return value_.real_;
+  case nullValue:
+    return 0.0;
+  case booleanValue:
+    return value_.bool_ ? 1.0 : 0.0;
+  default:
+    break;
+  }
+  JSON_FAIL_MESSAGE("Value is not convertible to double.");
+}
+
+float Value::asFloat() const {
+  switch (type()) {
+  case intValue:
+    return static_cast<float>(value_.int_);
+  case uintValue:
+#if !defined(JSON_USE_INT64_DOUBLE_CONVERSION)
+    return static_cast<float>(value_.uint_);
+#else  // if !defined(JSON_USE_INT64_DOUBLE_CONVERSION)
+    // This can fail (silently?) if the value is bigger than MAX_FLOAT.
+    return static_cast<float>(integerToDouble(value_.uint_));
+#endif // if !defined(JSON_USE_INT64_DOUBLE_CONVERSION)
+  case realValue:
+    return static_cast<float>(value_.real_);
+  case nullValue:
+    return 0.0;
+  case booleanValue:
+    return value_.bool_ ? 1.0F : 0.0F;
+  default:
+    break;
+  }
+  JSON_FAIL_MESSAGE("Value is not convertible to float.");
+}
+
+bool Value::asBool() const {
+  switch (type()) {
+  case booleanValue:
+    return value_.bool_;
+  case nullValue:
+    return false;
+  case intValue:
+    return value_.int_ != 0;
+  case uintValue:
+    return value_.uint_ != 0;
+  case realValue: {
+    // According to JavaScript language zero or NaN is regarded as false
+    const auto value_classification = std::fpclassify(value_.real_);
+    return value_classification != FP_ZERO && value_classification != FP_NAN;
+  }
+  default:
+    break;
+  }
+  JSON_FAIL_MESSAGE("Value is not convertible to bool.");
+}
+
+bool Value::isConvertibleTo(ValueType other) const {
+  switch (other) {
+  case nullValue:
+    return (isNumeric() && asDouble() == 0.0) ||
+           (type() == booleanValue && !value_.bool_) ||
+           (type() == stringValue && asString().empty()) ||
+           (type() == arrayValue && value_.map_->empty()) ||
+           (type() == objectValue && value_.map_->empty()) ||
+           type() == nullValue;
+  case intValue:
+    return isInt() ||
+           (type() == realValue && InRange(value_.real_, minInt, maxInt)) ||
+           type() == booleanValue || type() == nullValue;
+  case uintValue:
+    return isUInt() ||
+           (type() == realValue && InRange(value_.real_, 0, maxUInt)) ||
+           type() == booleanValue || type() == nullValue;
+  case realValue:
+    return isNumeric() || type() == booleanValue || type() == nullValue;
+  case booleanValue:
+    return isNumeric() || type() == booleanValue || type() == nullValue;
+  case stringValue:
+    return isNumeric() || type() == booleanValue || type() == stringValue ||
+           type() == nullValue;
+  case arrayValue:
+    return type() == arrayValue || type() == nullValue;
+  case objectValue:
+    return type() == objectValue || type() == nullValue;
+  }
+  JSON_ASSERT_UNREACHABLE;
+  return false;
+}
+
+/// Number of values in array or object
+ArrayIndex Value::size() const {
+  switch (type()) {
+  case nullValue:
+  case intValue:
+  case uintValue:
+  case realValue:
+  case booleanValue:
+  case stringValue:
+    return 0;
+  case arrayValue: // size of the array is highest index + 1
+    if (!value_.map_->empty()) {
+      ObjectValues::const_iterator itLast = value_.map_->end();
+      --itLast;
+      return (*itLast).first.index() + 1;
+    }
+    return 0;
+  case objectValue:
+    return ArrayIndex(value_.map_->size());
+  }
+  JSON_ASSERT_UNREACHABLE;
+  return 0; // unreachable;
+}
+
+bool Value::empty() const {
+  if (isNull() || isArray() || isObject())
+    return size() == 0U;
+  return false;
+}
+
+Value::operator bool() const { return !isNull(); }
+
+void Value::clear() {
+  JSON_ASSERT_MESSAGE(type() == nullValue || type() == arrayValue ||
+                          type() == objectValue,
+                      "in Json::Value::clear(): requires complex value");
+  start_ = 0;
+  limit_ = 0;
+  switch (type()) {
+  case arrayValue:
+  case objectValue:
+    value_.map_->clear();
+    break;
+  default:
+    break;
+  }
+}
+
+void Value::resize(ArrayIndex newSize) {
+  JSON_ASSERT_MESSAGE(type() == nullValue || type() == arrayValue,
+                      "in Json::Value::resize(): requires arrayValue");
+  if (type() == nullValue)
+    *this = Value(arrayValue);
+  ArrayIndex oldSize = size();
+  if (newSize == 0)
+    clear();
+  else if (newSize > oldSize)
+    for (ArrayIndex i = oldSize; i < newSize; ++i)
+      (*this)[i];
+  else {
+    for (ArrayIndex index = newSize; index < oldSize; ++index) {
+      value_.map_->erase(index);
+    }
+    JSON_ASSERT(size() == newSize);
+  }
+}
+
+Value& Value::operator[](ArrayIndex index) {
+  JSON_ASSERT_MESSAGE(
+      type() == nullValue || type() == arrayValue,
+      "in Json::Value::operator[](ArrayIndex): requires arrayValue");
+  if (type() == nullValue)
+    *this = Value(arrayValue);
+  CZString key(index);
+  auto it = value_.map_->lower_bound(key);
+  if (it != value_.map_->end() && (*it).first == key)
+    return (*it).second;
+
+  ObjectValues::value_type defaultValue(key, nullSingleton());
+  it = value_.map_->insert(it, defaultValue);
+  return (*it).second;
+}
+
+Value& Value::operator[](int index) {
+  JSON_ASSERT_MESSAGE(
+      index >= 0,
+      "in Json::Value::operator[](int index): index cannot be negative");
+  return (*this)[ArrayIndex(index)];
+}
+
+const Value& Value::operator[](ArrayIndex index) const {
+  JSON_ASSERT_MESSAGE(
+      type() == nullValue || type() == arrayValue,
+      "in Json::Value::operator[](ArrayIndex)const: requires arrayValue");
+  if (type() == nullValue)
+    return nullSingleton();
+  CZString key(index);
+  ObjectValues::const_iterator it = value_.map_->find(key);
+  if (it == value_.map_->end())
+    return nullSingleton();
+  return (*it).second;
+}
+
+const Value& Value::operator[](int index) const {
+  JSON_ASSERT_MESSAGE(
+      index >= 0,
+      "in Json::Value::operator[](int index) const: index cannot be negative");
+  return (*this)[ArrayIndex(index)];
+}
+
+void Value::initBasic(ValueType type, bool allocated) {
+  setType(type);
+  setIsAllocated(allocated);
+  comments_ = Comments{};
+  start_ = 0;
+  limit_ = 0;
+}
+
+void Value::dupPayload(const Value& other) {
+  setType(other.type());
+  setIsAllocated(false);
+  switch (type()) {
+  case nullValue:
+  case intValue:
+  case uintValue:
+  case realValue:
+  case booleanValue:
+    value_ = other.value_;
+    break;
+  case stringValue:
+    if (other.value_.string_ && other.isAllocated()) {
+      unsigned len;
+      char const* str;
+      decodePrefixedString(other.isAllocated(), other.value_.string_, &len,
+                           &str);
+      value_.string_ = duplicateAndPrefixStringValue(str, len);
+      setIsAllocated(true);
+    } else {
+      value_.string_ = other.value_.string_;
+    }
+    break;
+  case arrayValue:
+  case objectValue:
+    value_.map_ = new ObjectValues(*other.value_.map_);
+    break;
+  default:
+    JSON_ASSERT_UNREACHABLE;
+  }
+}
+
+void Value::releasePayload() {
+  switch (type()) {
+  case nullValue:
+  case intValue:
+  case uintValue:
+  case realValue:
+  case booleanValue:
+    break;
+  case stringValue:
+    if (isAllocated())
+      releasePrefixedStringValue(value_.string_);
+    break;
+  case arrayValue:
+  case objectValue:
+    delete value_.map_;
+    break;
+  default:
+    JSON_ASSERT_UNREACHABLE;
+  }
+}
+
+void Value::dupMeta(const Value& other) {
+  comments_ = other.comments_;
+  start_ = other.start_;
+  limit_ = other.limit_;
+}
+
+// Access an object value by name, create a null member if it does not exist.
+// @pre Type of '*this' is object or null.
+// @param key is null-terminated.
+Value& Value::resolveReference(const char* key) {
+  JSON_ASSERT_MESSAGE(
+      type() == nullValue || type() == objectValue,
+      "in Json::Value::resolveReference(): requires objectValue");
+  if (type() == nullValue)
+    *this = Value(objectValue);
+  CZString actualKey(key, static_cast<unsigned>(strlen(key)),
+                     CZString::noDuplication); // NOTE!
+  auto it = value_.map_->lower_bound(actualKey);
+  if (it != value_.map_->end() && (*it).first == actualKey)
+    return (*it).second;
+
+  ObjectValues::value_type defaultValue(actualKey, nullSingleton());
+  it = value_.map_->insert(it, defaultValue);
+  Value& value = (*it).second;
+  return value;
+}
+
+// @param key is not null-terminated.
+Value& Value::resolveReference(char const* key, char const* end) {
+  JSON_ASSERT_MESSAGE(
+      type() == nullValue || type() == objectValue,
+      "in Json::Value::resolveReference(key, end): requires objectValue");
+  if (type() == nullValue)
+    *this = Value(objectValue);
+  CZString actualKey(key, static_cast<unsigned>(end - key),
+                     CZString::duplicateOnCopy);
+  auto it = value_.map_->lower_bound(actualKey);
+  if (it != value_.map_->end() && (*it).first == actualKey)
+    return (*it).second;
+
+  ObjectValues::value_type defaultValue(actualKey, nullSingleton());
+  it = value_.map_->insert(it, defaultValue);
+  Value& value = (*it).second;
+  return value;
+}
+
+Value Value::get(ArrayIndex index, const Value& defaultValue) const {
+  const Value* value = &((*this)[index]);
+  return value == &nullSingleton() ? defaultValue : *value;
+}
+
+bool Value::isValidIndex(ArrayIndex index) const { return index < size(); }
+
+Value const* Value::find(char const* begin, char const* end) const {
+  JSON_ASSERT_MESSAGE(type() == nullValue || type() == objectValue,
+                      "in Json::Value::find(begin, end): requires "
+                      "objectValue or nullValue");
+  if (type() == nullValue)
+    return nullptr;
+  CZString actualKey(begin, static_cast<unsigned>(end - begin),
+                     CZString::noDuplication);
+  ObjectValues::const_iterator it = value_.map_->find(actualKey);
+  if (it == value_.map_->end())
+    return nullptr;
+  return &(*it).second;
+}
+Value* Value::demand(char const* begin, char const* end) {
+  JSON_ASSERT_MESSAGE(type() == nullValue || type() == objectValue,
+                      "in Json::Value::demand(begin, end): requires "
+                      "objectValue or nullValue");
+  return &resolveReference(begin, end);
+}
+const Value& Value::operator[](const char* key) const {
+  Value const* found = find(key, key + strlen(key));
+  if (!found)
+    return nullSingleton();
+  return *found;
+}
+Value const& Value::operator[](const String& key) const {
+  Value const* found = find(key.data(), key.data() + key.length());
+  if (!found)
+    return nullSingleton();
+  return *found;
+}
+
+Value& Value::operator[](const char* key) {
+  return resolveReference(key, key + strlen(key));
+}
+
+Value& Value::operator[](const String& key) {
+  return resolveReference(key.data(), key.data() + key.length());
+}
+
+Value& Value::operator[](const StaticString& key) {
+  return resolveReference(key.c_str());
+}
+
+Value& Value::append(const Value& value) { return append(Value(value)); }
+
+Value& Value::append(Value&& value) {
+  JSON_ASSERT_MESSAGE(type() == nullValue || type() == arrayValue,
+                      "in Json::Value::append: requires arrayValue");
+  if (type() == nullValue) {
+    *this = Value(arrayValue);
+  }
+  return this->value_.map_->emplace(size(), std::move(value)).first->second;
+}
+
+bool Value::insert(ArrayIndex index, const Value& newValue) {
+  return insert(index, Value(newValue));
+}
+
+bool Value::insert(ArrayIndex index, Value&& newValue) {
+  JSON_ASSERT_MESSAGE(type() == nullValue || type() == arrayValue,
+                      "in Json::Value::insert: requires arrayValue");
+  ArrayIndex length = size();
+  if (index > length) {
+    return false;
+  }
+  for (ArrayIndex i = length; i > index; i--) {
+    (*this)[i] = std::move((*this)[i - 1]);
+  }
+  (*this)[index] = std::move(newValue);
+  return true;
+}
+
+Value Value::get(char const* begin, char const* end,
+                 Value const& defaultValue) const {
+  Value const* found = find(begin, end);
+  return !found ? defaultValue : *found;
+}
+Value Value::get(char const* key, Value const& defaultValue) const {
+  return get(key, key + strlen(key), defaultValue);
+}
+Value Value::get(String const& key, Value const& defaultValue) const {
+  return get(key.data(), key.data() + key.length(), defaultValue);
+}
+
+bool Value::removeMember(const char* begin, const char* end, Value* removed) {
+  if (type() != objectValue) {
+    return false;
+  }
+  CZString actualKey(begin, static_cast<unsigned>(end - begin),
+                     CZString::noDuplication);
+  auto it = value_.map_->find(actualKey);
+  if (it == value_.map_->end())
+    return false;
+  if (removed)
+    *removed = std::move(it->second);
+  value_.map_->erase(it);
+  return true;
+}
+bool Value::removeMember(const char* key, Value* removed) {
+  return removeMember(key, key + strlen(key), removed);
+}
+bool Value::removeMember(String const& key, Value* removed) {
+  return removeMember(key.data(), key.data() + key.length(), removed);
+}
+void Value::removeMember(const char* key) {
+  JSON_ASSERT_MESSAGE(type() == nullValue || type() == objectValue,
+                      "in Json::Value::removeMember(): requires objectValue");
+  if (type() == nullValue)
+    return;
+
+  CZString actualKey(key, unsigned(strlen(key)), CZString::noDuplication);
+  value_.map_->erase(actualKey);
+}
+void Value::removeMember(const String& key) { removeMember(key.c_str()); }
+
+bool Value::removeIndex(ArrayIndex index, Value* removed) {
+  if (type() != arrayValue) {
+    return false;
+  }
+  CZString key(index);
+  auto it = value_.map_->find(key);
+  if (it == value_.map_->end()) {
+    return false;
+  }
+  if (removed)
+    *removed = it->second;
+  ArrayIndex oldSize = size();
+  // shift left all items left, into the place of the "removed"
+  for (ArrayIndex i = index; i < (oldSize - 1); ++i) {
+    CZString keey(i);
+    (*value_.map_)[keey] = (*this)[i + 1];
+  }
+  // erase the last one ("leftover")
+  CZString keyLast(oldSize - 1);
+  auto itLast = value_.map_->find(keyLast);
+  value_.map_->erase(itLast);
+  return true;
+}
+
+bool Value::isMember(char const* begin, char const* end) const {
+  Value const* value = find(begin, end);
+  return nullptr != value;
+}
+bool Value::isMember(char const* key) const {
+  return isMember(key, key + strlen(key));
+}
+bool Value::isMember(String const& key) const {
+  return isMember(key.data(), key.data() + key.length());
+}
+
+Value::Members Value::getMemberNames() const {
+  JSON_ASSERT_MESSAGE(
+      type() == nullValue || type() == objectValue,
+      "in Json::Value::getMemberNames(), value must be objectValue");
+  if (type() == nullValue)
+    return Value::Members();
+  Members members;
+  members.reserve(value_.map_->size());
+  ObjectValues::const_iterator it = value_.map_->begin();
+  ObjectValues::const_iterator itEnd = value_.map_->end();
+  for (; it != itEnd; ++it) {
+    members.push_back(String((*it).first.data(), (*it).first.length()));
+  }
+  return members;
+}
+
+static bool IsIntegral(double d) {
+  double integral_part;
+  return modf(d, &integral_part) == 0.0;
+}
+
+bool Value::isNull() const { return type() == nullValue; }
+
+bool Value::isBool() const { return type() == booleanValue; }
+
+bool Value::isInt() const {
+  switch (type()) {
+  case intValue:
+#if defined(JSON_HAS_INT64)
+    return value_.int_ >= minInt && value_.int_ <= maxInt;
+#else
+    return true;
+#endif
+  case uintValue:
+    return value_.uint_ <= UInt(maxInt);
+  case realValue:
+    return value_.real_ >= minInt && value_.real_ <= maxInt &&
+           IsIntegral(value_.real_);
+  default:
+    break;
+  }
+  return false;
+}
+
+bool Value::isUInt() const {
+  switch (type()) {
+  case intValue:
+#if defined(JSON_HAS_INT64)
+    return value_.int_ >= 0 && LargestUInt(value_.int_) <= LargestUInt(maxUInt);
+#else
+    return value_.int_ >= 0;
+#endif
+  case uintValue:
+#if defined(JSON_HAS_INT64)
+    return value_.uint_ <= maxUInt;
+#else
+    return true;
+#endif
+  case realValue:
+    return value_.real_ >= 0 && value_.real_ <= maxUInt &&
+           IsIntegral(value_.real_);
+  default:
+    break;
+  }
+  return false;
+}
+
+bool Value::isInt64() const {
+#if defined(JSON_HAS_INT64)
+  switch (type()) {
+  case intValue:
+    return true;
+  case uintValue:
+    return value_.uint_ <= UInt64(maxInt64);
+  case realValue:
+    // Note that maxInt64 (= 2^63 - 1) is not exactly representable as a
+    // double, so double(maxInt64) will be rounded up to 2^63. Therefore we
+    // require the value to be strictly less than the limit.
+    return value_.real_ >= double(minInt64) &&
+           value_.real_ < double(maxInt64) && IsIntegral(value_.real_);
+  default:
+    break;
+  }
+#endif // JSON_HAS_INT64
+  return false;
+}
+
+bool Value::isUInt64() const {
+#if defined(JSON_HAS_INT64)
+  switch (type()) {
+  case intValue:
+    return value_.int_ >= 0;
+  case uintValue:
+    return true;
+  case realValue:
+    // Note that maxUInt64 (= 2^64 - 1) is not exactly representable as a
+    // double, so double(maxUInt64) will be rounded up to 2^64. Therefore we
+    // require the value to be strictly less than the limit.
+    return value_.real_ >= 0 && value_.real_ < maxUInt64AsDouble &&
+           IsIntegral(value_.real_);
+  default:
+    break;
+  }
+#endif // JSON_HAS_INT64
+  return false;
+}
+
+bool Value::isIntegral() const {
+  switch (type()) {
+  case intValue:
+  case uintValue:
+    return true;
+  case realValue:
+#if defined(JSON_HAS_INT64)
+    // Note that maxUInt64 (= 2^64 - 1) is not exactly representable as a
+    // double, so double(maxUInt64) will be rounded up to 2^64. Therefore we
+    // require the value to be strictly less than the limit.
+    return value_.real_ >= double(minInt64) &&
+           value_.real_ < maxUInt64AsDouble && IsIntegral(value_.real_);
+#else
+    return value_.real_ >= minInt && value_.real_ <= maxUInt &&
+           IsIntegral(value_.real_);
+#endif // JSON_HAS_INT64
+  default:
+    break;
+  }
+  return false;
+}
+
+bool Value::isDouble() const {
+  return type() == intValue || type() == uintValue || type() == realValue;
+}
+
+bool Value::isNumeric() const { return isDouble(); }
+
+bool Value::isString() const { return type() == stringValue; }
+
+bool Value::isArray() const { return type() == arrayValue; }
+
+bool Value::isObject() const { return type() == objectValue; }
+
+Value::Comments::Comments(const Comments& that)
+    : ptr_{cloneUnique(that.ptr_)} {}
+
+Value::Comments::Comments(Comments&& that) noexcept
+    : ptr_{std::move(that.ptr_)} {}
+
+Value::Comments& Value::Comments::operator=(const Comments& that) {
+  ptr_ = cloneUnique(that.ptr_);
+  return *this;
+}
+
+Value::Comments& Value::Comments::operator=(Comments&& that) noexcept {
+  ptr_ = std::move(that.ptr_);
+  return *this;
+}
+
+bool Value::Comments::has(CommentPlacement slot) const {
+  return ptr_ && !(*ptr_)[slot].empty();
+}
+
+String Value::Comments::get(CommentPlacement slot) const {
+  if (!ptr_)
+    return {};
+  return (*ptr_)[slot];
+}
+
+void Value::Comments::set(CommentPlacement slot, String comment) {
+  if (slot >= CommentPlacement::numberOfCommentPlacement)
+    return;
+  if (!ptr_)
+    ptr_ = std::unique_ptr<Array>(new Array());
+  (*ptr_)[slot] = std::move(comment);
+}
+
+void Value::setComment(String comment, CommentPlacement placement) {
+  if (!comment.empty() && (comment.back() == '\n')) {
+    // Always discard trailing newline, to aid indentation.
+    comment.pop_back();
+  }
+  JSON_ASSERT(!comment.empty());
+  JSON_ASSERT_MESSAGE(
+      comment[0] == '\0' || comment[0] == '/',
+      "in Json::Value::setComment(): Comments must start with /");
+  comments_.set(placement, std::move(comment));
+}
+
+bool Value::hasComment(CommentPlacement placement) const {
+  return comments_.has(placement);
+}
+
+String Value::getComment(CommentPlacement placement) const {
+  return comments_.get(placement);
+}
+
+void Value::setOffsetStart(ptrdiff_t start) { start_ = start; }
+
+void Value::setOffsetLimit(ptrdiff_t limit) { limit_ = limit; }
+
+ptrdiff_t Value::getOffsetStart() const { return start_; }
+
+ptrdiff_t Value::getOffsetLimit() const { return limit_; }
+
+String Value::toStyledString() const {
+  StreamWriterBuilder builder;
+
+  String out = this->hasComment(commentBefore) ? "\n" : "";
+  out += Json::writeString(builder, *this);
+  out += '\n';
+
+  return out;
+}
+
+Value::const_iterator Value::begin() const {
+  switch (type()) {
+  case arrayValue:
+  case objectValue:
+    if (value_.map_)
+      return const_iterator(value_.map_->begin());
+    break;
+  default:
+    break;
+  }
+  return {};
+}
+
+Value::const_iterator Value::end() const {
+  switch (type()) {
+  case arrayValue:
+  case objectValue:
+    if (value_.map_)
+      return const_iterator(value_.map_->end());
+    break;
+  default:
+    break;
+  }
+  return {};
+}
+
+Value::iterator Value::begin() {
+  switch (type()) {
+  case arrayValue:
+  case objectValue:
+    if (value_.map_)
+      return iterator(value_.map_->begin());
+    break;
+  default:
+    break;
+  }
+  return iterator();
+}
+
+Value::iterator Value::end() {
+  switch (type()) {
+  case arrayValue:
+  case objectValue:
+    if (value_.map_)
+      return iterator(value_.map_->end());
+    break;
+  default:
+    break;
+  }
+  return iterator();
+}
+
+// class PathArgument
+// //////////////////////////////////////////////////////////////////
+
+PathArgument::PathArgument() = default;
+
+PathArgument::PathArgument(ArrayIndex index)
+    : index_(index), kind_(kindIndex) {}
+
+PathArgument::PathArgument(const char* key) : key_(key), kind_(kindKey) {}
+
+PathArgument::PathArgument(String key) : key_(std::move(key)), kind_(kindKey) {}
+
+// class Path
+// //////////////////////////////////////////////////////////////////
+
+Path::Path(const String& path, const PathArgument& a1, const PathArgument& a2,
+           const PathArgument& a3, const PathArgument& a4,
+           const PathArgument& a5) {
+  InArgs in;
+  in.reserve(5);
+  in.push_back(&a1);
+  in.push_back(&a2);
+  in.push_back(&a3);
+  in.push_back(&a4);
+  in.push_back(&a5);
+  makePath(path, in);
+}
+
+void Path::makePath(const String& path, const InArgs& in) {
+  const char* current = path.c_str();
+  const char* end = current + path.length();
+  auto itInArg = in.begin();
+  while (current != end) {
+    if (*current == '[') {
+      ++current;
+      if (*current == '%')
+        addPathInArg(path, in, itInArg, PathArgument::kindIndex);
+      else {
+        ArrayIndex index = 0;
+        for (; current != end && *current >= '0' && *current <= '9'; ++current)
+          index = index * 10 + ArrayIndex(*current - '0');
+        args_.push_back(index);
+      }
+      if (current == end || *++current != ']')
+        invalidPath(path, int(current - path.c_str()));
+    } else if (*current == '%') {
+      addPathInArg(path, in, itInArg, PathArgument::kindKey);
+      ++current;
+    } else if (*current == '.' || *current == ']') {
+      ++current;
+    } else {
+      const char* beginName = current;
+      while (current != end && !strchr("[.", *current))
+        ++current;
+      args_.push_back(String(beginName, current));
+    }
+  }
+}
+
+void Path::addPathInArg(const String& /*path*/, const InArgs& in,
+                        InArgs::const_iterator& itInArg,
+                        PathArgument::Kind kind) {
+  if (itInArg == in.end()) {
+    // Error: missing argument %d
+  } else if ((*itInArg)->kind_ != kind) {
+    // Error: bad argument type
+  } else {
+    args_.push_back(**itInArg++);
+  }
+}
+
+void Path::invalidPath(const String& /*path*/, int /*location*/) {
+  // Error: invalid path.
+}
+
+const Value& Path::resolve(const Value& root) const {
+  const Value* node = &root;
+  for (const auto& arg : args_) {
+    if (arg.kind_ == PathArgument::kindIndex) {
+      if (!node->isArray() || !node->isValidIndex(arg.index_)) {
+        // Error: unable to resolve path (array value expected at position... )
+        return Value::nullSingleton();
+      }
+      node = &((*node)[arg.index_]);
+    } else if (arg.kind_ == PathArgument::kindKey) {
+      if (!node->isObject()) {
+        // Error: unable to resolve path (object value expected at position...)
+        return Value::nullSingleton();
+      }
+      node = &((*node)[arg.key_]);
+      if (node == &Value::nullSingleton()) {
+        // Error: unable to resolve path (object has no member named '' at
+        // position...)
+        return Value::nullSingleton();
+      }
+    }
+  }
+  return *node;
+}
+
+Value Path::resolve(const Value& root, const Value& defaultValue) const {
+  const Value* node = &root;
+  for (const auto& arg : args_) {
+    if (arg.kind_ == PathArgument::kindIndex) {
+      if (!node->isArray() || !node->isValidIndex(arg.index_))
+        return defaultValue;
+      node = &((*node)[arg.index_]);
+    } else if (arg.kind_ == PathArgument::kindKey) {
+      if (!node->isObject())
+        return defaultValue;
+      node = &((*node)[arg.key_]);
+      if (node == &Value::nullSingleton())
+        return defaultValue;
+    }
+  }
+  return *node;
+}
+
+Value& Path::make(Value& root) const {
+  Value* node = &root;
+  for (const auto& arg : args_) {
+    if (arg.kind_ == PathArgument::kindIndex) {
+      if (!node->isArray()) {
+        // Error: node is not an array at position ...
+      }
+      node = &((*node)[arg.index_]);
+    } else if (arg.kind_ == PathArgument::kindKey) {
+      if (!node->isObject()) {
+        // Error: node is not an object at position...
+      }
+      node = &((*node)[arg.key_]);
+    }
+  }
+  return *node;
+}
+
+} // namespace Json
+
+// //////////////////////////////////////////////////////////////////////
+// End of content of file: src/lib_json/json_value.cpp
+// //////////////////////////////////////////////////////////////////////
+
+
+
+
+
+
+// //////////////////////////////////////////////////////////////////////
+// Beginning of content of file: src/lib_json/json_writer.cpp
+// //////////////////////////////////////////////////////////////////////
+
+// Copyright 2011 Baptiste Lepilleur and The JsonCpp Authors
+// Distributed under MIT license, or public domain if desired and
+// recognized in your jurisdiction.
+// See file LICENSE for detail or copy at http://jsoncpp.sourceforge.net/LICENSE
+
+#if !defined(JSON_IS_AMALGAMATION)
+#include "json_tool.h"
+#include <json/writer.h>
+#endif // if !defined(JSON_IS_AMALGAMATION)
+#include <algorithm>
+#include <cassert>
+#include <cctype>
+#include <cstring>
+#include <iomanip>
+#include <memory>
+#include <set>
+#include <sstream>
+#include <utility>
+
+#if __cplusplus >= 201103L
+#include <cmath>
+#include <cstdio>
+
+#if !defined(isnan)
+#define isnan std::isnan
+#endif
+
+#if !defined(isfinite)
+#define isfinite std::isfinite
+#endif
+
+#else
+#include <cmath>
+#include <cstdio>
+
+#if defined(_MSC_VER)
+#if !defined(isnan)
+#include <float.h>
+#define isnan _isnan
+#endif
+
+#if !defined(isfinite)
+#include <float.h>
+#define isfinite _finite
+#endif
+
+#if !defined(_CRT_SECURE_CPP_OVERLOAD_STANDARD_NAMES)
+#define _CRT_SECURE_CPP_OVERLOAD_STANDARD_NAMES 1
+#endif //_CRT_SECURE_CPP_OVERLOAD_STANDARD_NAMES
+
+#endif //_MSC_VER
+
+#if defined(__sun) && defined(__SVR4) // Solaris
+#if !defined(isfinite)
+#include <ieeefp.h>
+#define isfinite finite
+#endif
+#endif
+
+#if defined(__hpux)
+#if !defined(isfinite)
+#if defined(__ia64) && !defined(finite)
+#define isfinite(x)                                                            \
+  ((sizeof(x) == sizeof(float) ? _Isfinitef(x) : _IsFinite(x)))
+#endif
+#endif
+#endif
+
+#if !defined(isnan)
+// IEEE standard states that NaN values will not compare to themselves
+#define isnan(x) ((x) != (x))
+#endif
+
+#if !defined(__APPLE__)
+#if !defined(isfinite)
+#define isfinite finite
+#endif
+#endif
+#endif
+
+#if defined(_MSC_VER)
+// Disable warning about strdup being deprecated.
+#pragma warning(disable : 4996)
+#endif
+
+namespace Json {
+
+#if __cplusplus >= 201103L || (defined(_CPPLIB_VER) && _CPPLIB_VER >= 520)
+using StreamWriterPtr = std::unique_ptr<StreamWriter>;
+#else
+using StreamWriterPtr = std::auto_ptr<StreamWriter>;
+#endif
+
+String valueToString(LargestInt value) {
+  UIntToStringBuffer buffer;
+  char* current = buffer + sizeof(buffer);
+  if (value == Value::minLargestInt) {
+    uintToString(LargestUInt(Value::maxLargestInt) + 1, current);
+    *--current = '-';
+  } else if (value < 0) {
+    uintToString(LargestUInt(-value), current);
+    *--current = '-';
+  } else {
+    uintToString(LargestUInt(value), current);
+  }
+  assert(current >= buffer);
+  return current;
+}
+
+String valueToString(LargestUInt value) {
+  UIntToStringBuffer buffer;
+  char* current = buffer + sizeof(buffer);
+  uintToString(value, current);
+  assert(current >= buffer);
+  return current;
+}
+
+#if defined(JSON_HAS_INT64)
+
+String valueToString(Int value) { return valueToString(LargestInt(value)); }
+
+String valueToString(UInt value) { return valueToString(LargestUInt(value)); }
+
+#endif // # if defined(JSON_HAS_INT64)
+
+namespace {
+String valueToString(double value, bool useSpecialFloats,
+                     unsigned int precision, PrecisionType precisionType) {
+  // Print into the buffer. We need not request the alternative representation
+  // that always has a decimal point because JSON doesn't distinguish the
+  // concepts of reals and integers.
+  if (!isfinite(value)) {
+    static const char* const reps[2][3] = {{"NaN", "-Infinity", "Infinity"},
+                                           {"null", "-1e+9999", "1e+9999"}};
+    return reps[useSpecialFloats ? 0 : 1]
+               [isnan(value) ? 0 : (value < 0) ? 1 : 2];
+  }
+
+  String buffer(size_t(36), '\0');
+  while (true) {
+    int len = jsoncpp_snprintf(
+        &*buffer.begin(), buffer.size(),
+        (precisionType == PrecisionType::significantDigits) ? "%.*g" : "%.*f",
+        precision, value);
+    assert(len >= 0);
+    auto wouldPrint = static_cast<size_t>(len);
+    if (wouldPrint >= buffer.size()) {
+      buffer.resize(wouldPrint + 1);
+      continue;
+    }
+    buffer.resize(wouldPrint);
+    break;
+  }
+
+  buffer.erase(fixNumericLocale(buffer.begin(), buffer.end()), buffer.end());
+
+  // try to ensure we preserve the fact that this was given to us as a double on
+  // input
+  if (buffer.find('.') == buffer.npos && buffer.find('e') == buffer.npos) {
+    buffer += ".0";
+  }
+
+  // strip the zero padding from the right
+  if (precisionType == PrecisionType::decimalPlaces) {
+    buffer.erase(fixZerosInTheEnd(buffer.begin(), buffer.end(), precision),
+                 buffer.end());
+  }
+
+  return buffer;
+}
+} // namespace
+
+String valueToString(double value, unsigned int precision,
+                     PrecisionType precisionType) {
+  return valueToString(value, false, precision, precisionType);
+}
+
+String valueToString(bool value) { return value ? "true" : "false"; }
+
+static bool doesAnyCharRequireEscaping(char const* s, size_t n) {
+  assert(s || !n);
+
+  return std::any_of(s, s + n, [](unsigned char c) {
+    return c == '\\' || c == '"' || c < 0x20 || c > 0x7F;
+  });
+}
+
+static unsigned int utf8ToCodepoint(const char*& s, const char* e) {
+  const unsigned int REPLACEMENT_CHARACTER = 0xFFFD;
+
+  unsigned int firstByte = static_cast<unsigned char>(*s);
+
+  if (firstByte < 0x80)
+    return firstByte;
+
+  if (firstByte < 0xE0) {
+    if (e - s < 2)
+      return REPLACEMENT_CHARACTER;
+
+    unsigned int calculated =
+        ((firstByte & 0x1F) << 6) | (static_cast<unsigned int>(s[1]) & 0x3F);
+    s += 1;
+    // oversized encoded characters are invalid
+    return calculated < 0x80 ? REPLACEMENT_CHARACTER : calculated;
+  }
+
+  if (firstByte < 0xF0) {
+    if (e - s < 3)
+      return REPLACEMENT_CHARACTER;
+
+    unsigned int calculated = ((firstByte & 0x0F) << 12) |
+                              ((static_cast<unsigned int>(s[1]) & 0x3F) << 6) |
+                              (static_cast<unsigned int>(s[2]) & 0x3F);
+    s += 2;
+    // surrogates aren't valid codepoints itself
+    // shouldn't be UTF-8 encoded
+    if (calculated >= 0xD800 && calculated <= 0xDFFF)
+      return REPLACEMENT_CHARACTER;
+    // oversized encoded characters are invalid
+    return calculated < 0x800 ? REPLACEMENT_CHARACTER : calculated;
+  }
+
+  if (firstByte < 0xF8) {
+    if (e - s < 4)
+      return REPLACEMENT_CHARACTER;
+
+    unsigned int calculated = ((firstByte & 0x07) << 18) |
+                              ((static_cast<unsigned int>(s[1]) & 0x3F) << 12) |
+                              ((static_cast<unsigned int>(s[2]) & 0x3F) << 6) |
+                              (static_cast<unsigned int>(s[3]) & 0x3F);
+    s += 3;
+    // oversized encoded characters are invalid
+    return calculated < 0x10000 ? REPLACEMENT_CHARACTER : calculated;
+  }
+
+  return REPLACEMENT_CHARACTER;
+}
+
+static const char hex2[] = "000102030405060708090a0b0c0d0e0f"
+                           "101112131415161718191a1b1c1d1e1f"
+                           "202122232425262728292a2b2c2d2e2f"
+                           "303132333435363738393a3b3c3d3e3f"
+                           "404142434445464748494a4b4c4d4e4f"
+                           "505152535455565758595a5b5c5d5e5f"
+                           "606162636465666768696a6b6c6d6e6f"
+                           "707172737475767778797a7b7c7d7e7f"
+                           "808182838485868788898a8b8c8d8e8f"
+                           "909192939495969798999a9b9c9d9e9f"
+                           "a0a1a2a3a4a5a6a7a8a9aaabacadaeaf"
+                           "b0b1b2b3b4b5b6b7b8b9babbbcbdbebf"
+                           "c0c1c2c3c4c5c6c7c8c9cacbcccdcecf"
+                           "d0d1d2d3d4d5d6d7d8d9dadbdcdddedf"
+                           "e0e1e2e3e4e5e6e7e8e9eaebecedeeef"
+                           "f0f1f2f3f4f5f6f7f8f9fafbfcfdfeff";
+
+static String toHex16Bit(unsigned int x) {
+  const unsigned int hi = (x >> 8) & 0xff;
+  const unsigned int lo = x & 0xff;
+  String result(4, ' ');
+  result[0] = hex2[2 * hi];
+  result[1] = hex2[2 * hi + 1];
+  result[2] = hex2[2 * lo];
+  result[3] = hex2[2 * lo + 1];
+  return result;
+}
+
+static void appendRaw(String& result, unsigned ch) {
+  result += static_cast<char>(ch);
+}
+
+static void appendHex(String& result, unsigned ch) {
+  result.append("\\u").append(toHex16Bit(ch));
+}
+
+static String valueToQuotedStringN(const char* value, size_t length,
+                                   bool emitUTF8 = false) {
+  if (value == nullptr)
+    return "";
+
+  if (!doesAnyCharRequireEscaping(value, length))
+    return String("\"") + value + "\"";
+  // We have to walk value and escape any special characters.
+  // Appending to String is not efficient, but this should be rare.
+  // (Note: forward slashes are *not* rare, but I am not escaping them.)
+  String::size_type maxsize = length * 2 + 3; // allescaped+quotes+NULL
+  String result;
+  result.reserve(maxsize); // to avoid lots of mallocs
+  result += "\"";
+  char const* end = value + length;
+  for (const char* c = value; c != end; ++c) {
+    switch (*c) {
+    case '\"':
+      result += "\\\"";
+      break;
+    case '\\':
+      result += "\\\\";
+      break;
+    case '\b':
+      result += "\\b";
+      break;
+    case '\f':
+      result += "\\f";
+      break;
+    case '\n':
+      result += "\\n";
+      break;
+    case '\r':
+      result += "\\r";
+      break;
+    case '\t':
+      result += "\\t";
+      break;
+    // case '/':
+    // Even though \/ is considered a legal escape in JSON, a bare
+    // slash is also legal, so I see no reason to escape it.
+    // (I hope I am not misunderstanding something.)
+    // blep notes: actually escaping \/ may be useful in javascript to avoid </
+    // sequence.
+    // Should add a flag to allow this compatibility mode and prevent this
+    // sequence from occurring.
+    default: {
+      if (emitUTF8) {
+        unsigned codepoint = static_cast<unsigned char>(*c);
+        if (codepoint < 0x20) {
+          appendHex(result, codepoint);
+        } else {
+          appendRaw(result, codepoint);
+        }
+      } else {
+        unsigned codepoint = utf8ToCodepoint(c, end); // modifies `c`
+        if (codepoint < 0x20) {
+          appendHex(result, codepoint);
+        } else if (codepoint < 0x80) {
+          appendRaw(result, codepoint);
+        } else if (codepoint < 0x10000) {
+          // Basic Multilingual Plane
+          appendHex(result, codepoint);
+        } else {
+          // Extended Unicode. Encode 20 bits as a surrogate pair.
+          codepoint -= 0x10000;
+          appendHex(result, 0xd800 + ((codepoint >> 10) & 0x3ff));
+          appendHex(result, 0xdc00 + (codepoint & 0x3ff));
+        }
+      }
+    } break;
+    }
+  }
+  result += "\"";
+  return result;
+}
+
+String valueToQuotedString(const char* value) {
+  return valueToQuotedStringN(value, strlen(value));
+}
+
+// Class Writer
+// //////////////////////////////////////////////////////////////////
+Writer::~Writer() = default;
+
+// Class FastWriter
+// //////////////////////////////////////////////////////////////////
+
+FastWriter::FastWriter()
+
+    = default;
+
+void FastWriter::enableYAMLCompatibility() { yamlCompatibilityEnabled_ = true; }
+
+void FastWriter::dropNullPlaceholders() { dropNullPlaceholders_ = true; }
+
+void FastWriter::omitEndingLineFeed() { omitEndingLineFeed_ = true; }
+
+String FastWriter::write(const Value& root) {
+  document_.clear();
+  writeValue(root);
+  if (!omitEndingLineFeed_)
+    document_ += '\n';
+  return document_;
+}
+
+void FastWriter::writeValue(const Value& value) {
+  switch (value.type()) {
+  case nullValue:
+    if (!dropNullPlaceholders_)
+      document_ += "null";
+    break;
+  case intValue:
+    document_ += valueToString(value.asLargestInt());
+    break;
+  case uintValue:
+    document_ += valueToString(value.asLargestUInt());
+    break;
+  case realValue:
+    document_ += valueToString(value.asDouble());
+    break;
+  case stringValue: {
+    // Is NULL possible for value.string_? No.
+    char const* str;
+    char const* end;
+    bool ok = value.getString(&str, &end);
+    if (ok)
+      document_ += valueToQuotedStringN(str, static_cast<size_t>(end - str));
+    break;
+  }
+  case booleanValue:
+    document_ += valueToString(value.asBool());
+    break;
+  case arrayValue: {
+    document_ += '[';
+    ArrayIndex size = value.size();
+    for (ArrayIndex index = 0; index < size; ++index) {
+      if (index > 0)
+        document_ += ',';
+      writeValue(value[index]);
+    }
+    document_ += ']';
+  } break;
+  case objectValue: {
+    Value::Members members(value.getMemberNames());
+    document_ += '{';
+    for (auto it = members.begin(); it != members.end(); ++it) {
+      const String& name = *it;
+      if (it != members.begin())
+        document_ += ',';
+      document_ += valueToQuotedStringN(name.data(), name.length());
+      document_ += yamlCompatibilityEnabled_ ? ": " : ":";
+      writeValue(value[name]);
+    }
+    document_ += '}';
+  } break;
+  }
+}
+
+// Class StyledWriter
+// //////////////////////////////////////////////////////////////////
+
+StyledWriter::StyledWriter() = default;
+
+String StyledWriter::write(const Value& root) {
+  document_.clear();
+  addChildValues_ = false;
+  indentString_.clear();
+  writeCommentBeforeValue(root);
+  writeValue(root);
+  writeCommentAfterValueOnSameLine(root);
+  document_ += '\n';
+  return document_;
+}
+
+void StyledWriter::writeValue(const Value& value) {
+  switch (value.type()) {
+  case nullValue:
+    pushValue("null");
+    break;
+  case intValue:
+    pushValue(valueToString(value.asLargestInt()));
+    break;
+  case uintValue:
+    pushValue(valueToString(value.asLargestUInt()));
+    break;
+  case realValue:
+    pushValue(valueToString(value.asDouble()));
+    break;
+  case stringValue: {
+    // Is NULL possible for value.string_? No.
+    char const* str;
+    char const* end;
+    bool ok = value.getString(&str, &end);
+    if (ok)
+      pushValue(valueToQuotedStringN(str, static_cast<size_t>(end - str)));
+    else
+      pushValue("");
+    break;
+  }
+  case booleanValue:
+    pushValue(valueToString(value.asBool()));
+    break;
+  case arrayValue:
+    writeArrayValue(value);
+    break;
+  case objectValue: {
+    Value::Members members(value.getMemberNames());
+    if (members.empty())
+      pushValue("{}");
+    else {
+      writeWithIndent("{");
+      indent();
+      auto it = members.begin();
+      for (;;) {
+        const String& name = *it;
+        const Value& childValue = value[name];
+        writeCommentBeforeValue(childValue);
+        writeWithIndent(valueToQuotedString(name.c_str()));
+        document_ += " : ";
+        writeValue(childValue);
+        if (++it == members.end()) {
+          writeCommentAfterValueOnSameLine(childValue);
+          break;
+        }
+        document_ += ',';
+        writeCommentAfterValueOnSameLine(childValue);
+      }
+      unindent();
+      writeWithIndent("}");
+    }
+  } break;
+  }
+}
+
+void StyledWriter::writeArrayValue(const Value& value) {
+  size_t size = value.size();
+  if (size == 0)
+    pushValue("[]");
+  else {
+    bool isArrayMultiLine = isMultilineArray(value);
+    if (isArrayMultiLine) {
+      writeWithIndent("[");
+      indent();
+      bool hasChildValue = !childValues_.empty();
+      ArrayIndex index = 0;
+      for (;;) {
+        const Value& childValue = value[index];
+        writeCommentBeforeValue(childValue);
+        if (hasChildValue)
+          writeWithIndent(childValues_[index]);
+        else {
+          writeIndent();
+          writeValue(childValue);
+        }
+        if (++index == size) {
+          writeCommentAfterValueOnSameLine(childValue);
+          break;
+        }
+        document_ += ',';
+        writeCommentAfterValueOnSameLine(childValue);
+      }
+      unindent();
+      writeWithIndent("]");
+    } else // output on a single line
+    {
+      assert(childValues_.size() == size);
+      document_ += "[ ";
+      for (size_t index = 0; index < size; ++index) {
+        if (index > 0)
+          document_ += ", ";
+        document_ += childValues_[index];
+      }
+      document_ += " ]";
+    }
+  }
+}
+
+bool StyledWriter::isMultilineArray(const Value& value) {
+  ArrayIndex const size = value.size();
+  bool isMultiLine = size * 3 >= rightMargin_;
+  childValues_.clear();
+  for (ArrayIndex index = 0; index < size && !isMultiLine; ++index) {
+    const Value& childValue = value[index];
+    isMultiLine = ((childValue.isArray() || childValue.isObject()) &&
+                   !childValue.empty());
+  }
+  if (!isMultiLine) // check if line length > max line length
+  {
+    childValues_.reserve(size);
+    addChildValues_ = true;
+    ArrayIndex lineLength = 4 + (size - 1) * 2; // '[ ' + ', '*n + ' ]'
+    for (ArrayIndex index = 0; index < size; ++index) {
+      if (hasCommentForValue(value[index])) {
+        isMultiLine = true;
+      }
+      writeValue(value[index]);
+      lineLength += static_cast<ArrayIndex>(childValues_[index].length());
+    }
+    addChildValues_ = false;
+    isMultiLine = isMultiLine || lineLength >= rightMargin_;
+  }
+  return isMultiLine;
+}
+
+void StyledWriter::pushValue(const String& value) {
+  if (addChildValues_)
+    childValues_.push_back(value);
+  else
+    document_ += value;
+}
+
+void StyledWriter::writeIndent() {
+  if (!document_.empty()) {
+    char last = document_[document_.length() - 1];
+    if (last == ' ') // already indented
+      return;
+    if (last != '\n') // Comments may add new-line
+      document_ += '\n';
+  }
+  document_ += indentString_;
+}
+
+void StyledWriter::writeWithIndent(const String& value) {
+  writeIndent();
+  document_ += value;
+}
+
+void StyledWriter::indent() { indentString_ += String(indentSize_, ' '); }
+
+void StyledWriter::unindent() {
+  assert(indentString_.size() >= indentSize_);
+  indentString_.resize(indentString_.size() - indentSize_);
+}
+
+void StyledWriter::writeCommentBeforeValue(const Value& root) {
+  if (!root.hasComment(commentBefore))
+    return;
+
+  document_ += '\n';
+  writeIndent();
+  const String& comment = root.getComment(commentBefore);
+  String::const_iterator iter = comment.begin();
+  while (iter != comment.end()) {
+    document_ += *iter;
+    if (*iter == '\n' && ((iter + 1) != comment.end() && *(iter + 1) == '/'))
+      writeIndent();
+    ++iter;
+  }
+
+  // Comments are stripped of trailing newlines, so add one here
+  document_ += '\n';
+}
+
+void StyledWriter::writeCommentAfterValueOnSameLine(const Value& root) {
+  if (root.hasComment(commentAfterOnSameLine))
+    document_ += " " + root.getComment(commentAfterOnSameLine);
+
+  if (root.hasComment(commentAfter)) {
+    document_ += '\n';
+    document_ += root.getComment(commentAfter);
+    document_ += '\n';
+  }
+}
+
+bool StyledWriter::hasCommentForValue(const Value& value) {
+  return value.hasComment(commentBefore) ||
+         value.hasComment(commentAfterOnSameLine) ||
+         value.hasComment(commentAfter);
+}
+
+// Class StyledStreamWriter
+// //////////////////////////////////////////////////////////////////
+
+StyledStreamWriter::StyledStreamWriter(String indentation)
+    : document_(nullptr), indentation_(std::move(indentation)),
+      addChildValues_(), indented_(false) {}
+
+void StyledStreamWriter::write(OStream& out, const Value& root) {
+  document_ = &out;
+  addChildValues_ = false;
+  indentString_.clear();
+  indented_ = true;
+  writeCommentBeforeValue(root);
+  if (!indented_)
+    writeIndent();
+  indented_ = true;
+  writeValue(root);
+  writeCommentAfterValueOnSameLine(root);
+  *document_ << "\n";
+  document_ = nullptr; // Forget the stream, for safety.
+}
+
+void StyledStreamWriter::writeValue(const Value& value) {
+  switch (value.type()) {
+  case nullValue:
+    pushValue("null");
+    break;
+  case intValue:
+    pushValue(valueToString(value.asLargestInt()));
+    break;
+  case uintValue:
+    pushValue(valueToString(value.asLargestUInt()));
+    break;
+  case realValue:
+    pushValue(valueToString(value.asDouble()));
+    break;
+  case stringValue: {
+    // Is NULL possible for value.string_? No.
+    char const* str;
+    char const* end;
+    bool ok = value.getString(&str, &end);
+    if (ok)
+      pushValue(valueToQuotedStringN(str, static_cast<size_t>(end - str)));
+    else
+      pushValue("");
+    break;
+  }
+  case booleanValue:
+    pushValue(valueToString(value.asBool()));
+    break;
+  case arrayValue:
+    writeArrayValue(value);
+    break;
+  case objectValue: {
+    Value::Members members(value.getMemberNames());
+    if (members.empty())
+      pushValue("{}");
+    else {
+      writeWithIndent("{");
+      indent();
+      auto it = members.begin();
+      for (;;) {
+        const String& name = *it;
+        const Value& childValue = value[name];
+        writeCommentBeforeValue(childValue);
+        writeWithIndent(valueToQuotedString(name.c_str()));
+        *document_ << " : ";
+        writeValue(childValue);
+        if (++it == members.end()) {
+          writeCommentAfterValueOnSameLine(childValue);
+          break;
+        }
+        *document_ << ",";
+        writeCommentAfterValueOnSameLine(childValue);
+      }
+      unindent();
+      writeWithIndent("}");
+    }
+  } break;
+  }
+}
+
+void StyledStreamWriter::writeArrayValue(const Value& value) {
+  unsigned size = value.size();
+  if (size == 0)
+    pushValue("[]");
+  else {
+    bool isArrayMultiLine = isMultilineArray(value);
+    if (isArrayMultiLine) {
+      writeWithIndent("[");
+      indent();
+      bool hasChildValue = !childValues_.empty();
+      unsigned index = 0;
+      for (;;) {
+        const Value& childValue = value[index];
+        writeCommentBeforeValue(childValue);
+        if (hasChildValue)
+          writeWithIndent(childValues_[index]);
+        else {
+          if (!indented_)
+            writeIndent();
+          indented_ = true;
+          writeValue(childValue);
+          indented_ = false;
+        }
+        if (++index == size) {
+          writeCommentAfterValueOnSameLine(childValue);
+          break;
+        }
+        *document_ << ",";
+        writeCommentAfterValueOnSameLine(childValue);
+      }
+      unindent();
+      writeWithIndent("]");
+    } else // output on a single line
+    {
+      assert(childValues_.size() == size);
+      *document_ << "[ ";
+      for (unsigned index = 0; index < size; ++index) {
+        if (index > 0)
+          *document_ << ", ";
+        *document_ << childValues_[index];
+      }
+      *document_ << " ]";
+    }
+  }
+}
+
+bool StyledStreamWriter::isMultilineArray(const Value& value) {
+  ArrayIndex const size = value.size();
+  bool isMultiLine = size * 3 >= rightMargin_;
+  childValues_.clear();
+  for (ArrayIndex index = 0; index < size && !isMultiLine; ++index) {
+    const Value& childValue = value[index];
+    isMultiLine = ((childValue.isArray() || childValue.isObject()) &&
+                   !childValue.empty());
+  }
+  if (!isMultiLine) // check if line length > max line length
+  {
+    childValues_.reserve(size);
+    addChildValues_ = true;
+    ArrayIndex lineLength = 4 + (size - 1) * 2; // '[ ' + ', '*n + ' ]'
+    for (ArrayIndex index = 0; index < size; ++index) {
+      if (hasCommentForValue(value[index])) {
+        isMultiLine = true;
+      }
+      writeValue(value[index]);
+      lineLength += static_cast<ArrayIndex>(childValues_[index].length());
+    }
+    addChildValues_ = false;
+    isMultiLine = isMultiLine || lineLength >= rightMargin_;
+  }
+  return isMultiLine;
+}
+
+void StyledStreamWriter::pushValue(const String& value) {
+  if (addChildValues_)
+    childValues_.push_back(value);
+  else
+    *document_ << value;
+}
+
+void StyledStreamWriter::writeIndent() {
+  // blep intended this to look at the so-far-written string
+  // to determine whether we are already indented, but
+  // with a stream we cannot do that. So we rely on some saved state.
+  // The caller checks indented_.
+  *document_ << '\n' << indentString_;
+}
+
+void StyledStreamWriter::writeWithIndent(const String& value) {
+  if (!indented_)
+    writeIndent();
+  *document_ << value;
+  indented_ = false;
+}
+
+void StyledStreamWriter::indent() { indentString_ += indentation_; }
+
+void StyledStreamWriter::unindent() {
+  assert(indentString_.size() >= indentation_.size());
+  indentString_.resize(indentString_.size() - indentation_.size());
+}
+
+void StyledStreamWriter::writeCommentBeforeValue(const Value& root) {
+  if (!root.hasComment(commentBefore))
+    return;
+
+  if (!indented_)
+    writeIndent();
+  const String& comment = root.getComment(commentBefore);
+  String::const_iterator iter = comment.begin();
+  while (iter != comment.end()) {
+    *document_ << *iter;
+    if (*iter == '\n' && ((iter + 1) != comment.end() && *(iter + 1) == '/'))
+      // writeIndent();  // would include newline
+      *document_ << indentString_;
+    ++iter;
+  }
+  indented_ = false;
+}
+
+void StyledStreamWriter::writeCommentAfterValueOnSameLine(const Value& root) {
+  if (root.hasComment(commentAfterOnSameLine))
+    *document_ << ' ' << root.getComment(commentAfterOnSameLine);
+
+  if (root.hasComment(commentAfter)) {
+    writeIndent();
+    *document_ << root.getComment(commentAfter);
+  }
+  indented_ = false;
+}
+
+bool StyledStreamWriter::hasCommentForValue(const Value& value) {
+  return value.hasComment(commentBefore) ||
+         value.hasComment(commentAfterOnSameLine) ||
+         value.hasComment(commentAfter);
+}
+
+//////////////////////////
+// BuiltStyledStreamWriter
+
+/// Scoped enums are not available until C++11.
+struct CommentStyle {
+  /// Decide whether to write comments.
+  enum Enum {
+    None, ///< Drop all comments.
+    Most, ///< Recover odd behavior of previous versions (not implemented yet).
+    All   ///< Keep all comments.
+  };
+};
+
+struct BuiltStyledStreamWriter : public StreamWriter {
+  BuiltStyledStreamWriter(String indentation, CommentStyle::Enum cs,
+                          String colonSymbol, String nullSymbol,
+                          String endingLineFeedSymbol, bool useSpecialFloats,
+                          bool emitUTF8, unsigned int precision,
+                          PrecisionType precisionType);
+  int write(Value const& root, OStream* sout) override;
+
+private:
+  void writeValue(Value const& value);
+  void writeArrayValue(Value const& value);
+  bool isMultilineArray(Value const& value);
+  void pushValue(String const& value);
+  void writeIndent();
+  void writeWithIndent(String const& value);
+  void indent();
+  void unindent();
+  void writeCommentBeforeValue(Value const& root);
+  void writeCommentAfterValueOnSameLine(Value const& root);
+  static bool hasCommentForValue(const Value& value);
+
+  using ChildValues = std::vector<String>;
+
+  ChildValues childValues_;
+  String indentString_;
+  unsigned int rightMargin_;
+  String indentation_;
+  CommentStyle::Enum cs_;
+  String colonSymbol_;
+  String nullSymbol_;
+  String endingLineFeedSymbol_;
+  bool addChildValues_ : 1;
+  bool indented_ : 1;
+  bool useSpecialFloats_ : 1;
+  bool emitUTF8_ : 1;
+  unsigned int precision_;
+  PrecisionType precisionType_;
+};
+BuiltStyledStreamWriter::BuiltStyledStreamWriter(
+    String indentation, CommentStyle::Enum cs, String colonSymbol,
+    String nullSymbol, String endingLineFeedSymbol, bool useSpecialFloats,
+    bool emitUTF8, unsigned int precision, PrecisionType precisionType)
+    : rightMargin_(74), indentation_(std::move(indentation)), cs_(cs),
+      colonSymbol_(std::move(colonSymbol)), nullSymbol_(std::move(nullSymbol)),
+      endingLineFeedSymbol_(std::move(endingLineFeedSymbol)),
+      addChildValues_(false), indented_(false),
+      useSpecialFloats_(useSpecialFloats), emitUTF8_(emitUTF8),
+      precision_(precision), precisionType_(precisionType) {}
+int BuiltStyledStreamWriter::write(Value const& root, OStream* sout) {
+  sout_ = sout;
+  addChildValues_ = false;
+  indented_ = true;
+  indentString_.clear();
+  writeCommentBeforeValue(root);
+  if (!indented_)
+    writeIndent();
+  indented_ = true;
+  writeValue(root);
+  writeCommentAfterValueOnSameLine(root);
+  *sout_ << endingLineFeedSymbol_;
+  sout_ = nullptr;
+  return 0;
+}
+void BuiltStyledStreamWriter::writeValue(Value const& value) {
+  switch (value.type()) {
+  case nullValue:
+    pushValue(nullSymbol_);
+    break;
+  case intValue:
+    pushValue(valueToString(value.asLargestInt()));
+    break;
+  case uintValue:
+    pushValue(valueToString(value.asLargestUInt()));
+    break;
+  case realValue:
+    pushValue(valueToString(value.asDouble(), useSpecialFloats_, precision_,
+                            precisionType_));
+    break;
+  case stringValue: {
+    // Is NULL is possible for value.string_? No.
+    char const* str;
+    char const* end;
+    bool ok = value.getString(&str, &end);
+    if (ok)
+      pushValue(
+          valueToQuotedStringN(str, static_cast<size_t>(end - str), emitUTF8_));
+    else
+      pushValue("");
+    break;
+  }
+  case booleanValue:
+    pushValue(valueToString(value.asBool()));
+    break;
+  case arrayValue:
+    writeArrayValue(value);
+    break;
+  case objectValue: {
+    Value::Members members(value.getMemberNames());
+    if (members.empty())
+      pushValue("{}");
+    else {
+      writeWithIndent("{");
+      indent();
+      auto it = members.begin();
+      for (;;) {
+        String const& name = *it;
+        Value const& childValue = value[name];
+        writeCommentBeforeValue(childValue);
+        writeWithIndent(
+            valueToQuotedStringN(name.data(), name.length(), emitUTF8_));
+        *sout_ << colonSymbol_;
+        writeValue(childValue);
+        if (++it == members.end()) {
+          writeCommentAfterValueOnSameLine(childValue);
+          break;
+        }
+        *sout_ << ",";
+        writeCommentAfterValueOnSameLine(childValue);
+      }
+      unindent();
+      writeWithIndent("}");
+    }
+  } break;
+  }
+}
+
+void BuiltStyledStreamWriter::writeArrayValue(Value const& value) {
+  unsigned size = value.size();
+  if (size == 0)
+    pushValue("[]");
+  else {
+    bool isMultiLine = (cs_ == CommentStyle::All) || isMultilineArray(value);
+    if (isMultiLine) {
+      writeWithIndent("[");
+      indent();
+      bool hasChildValue = !childValues_.empty();
+      unsigned index = 0;
+      for (;;) {
+        Value const& childValue = value[index];
+        writeCommentBeforeValue(childValue);
+        if (hasChildValue)
+          writeWithIndent(childValues_[index]);
+        else {
+          if (!indented_)
+            writeIndent();
+          indented_ = true;
+          writeValue(childValue);
+          indented_ = false;
+        }
+        if (++index == size) {
+          writeCommentAfterValueOnSameLine(childValue);
+          break;
+        }
+        *sout_ << ",";
+        writeCommentAfterValueOnSameLine(childValue);
+      }
+      unindent();
+      writeWithIndent("]");
+    } else // output on a single line
+    {
+      assert(childValues_.size() == size);
+      *sout_ << "[";
+      if (!indentation_.empty())
+        *sout_ << " ";
+      for (unsigned index = 0; index < size; ++index) {
+        if (index > 0)
+          *sout_ << ((!indentation_.empty()) ? ", " : ",");
+        *sout_ << childValues_[index];
+      }
+      if (!indentation_.empty())
+        *sout_ << " ";
+      *sout_ << "]";
+    }
+  }
+}
+
+bool BuiltStyledStreamWriter::isMultilineArray(Value const& value) {
+  ArrayIndex const size = value.size();
+  bool isMultiLine = size * 3 >= rightMargin_;
+  childValues_.clear();
+  for (ArrayIndex index = 0; index < size && !isMultiLine; ++index) {
+    Value const& childValue = value[index];
+    isMultiLine = ((childValue.isArray() || childValue.isObject()) &&
+                   !childValue.empty());
+  }
+  if (!isMultiLine) // check if line length > max line length
+  {
+    childValues_.reserve(size);
+    addChildValues_ = true;
+    ArrayIndex lineLength = 4 + (size - 1) * 2; // '[ ' + ', '*n + ' ]'
+    for (ArrayIndex index = 0; index < size; ++index) {
+      if (hasCommentForValue(value[index])) {
+        isMultiLine = true;
+      }
+      writeValue(value[index]);
+      lineLength += static_cast<ArrayIndex>(childValues_[index].length());
+    }
+    addChildValues_ = false;
+    isMultiLine = isMultiLine || lineLength >= rightMargin_;
+  }
+  return isMultiLine;
+}
+
+void BuiltStyledStreamWriter::pushValue(String const& value) {
+  if (addChildValues_)
+    childValues_.push_back(value);
+  else
+    *sout_ << value;
+}
+
+void BuiltStyledStreamWriter::writeIndent() {
+  // blep intended this to look at the so-far-written string
+  // to determine whether we are already indented, but
+  // with a stream we cannot do that. So we rely on some saved state.
+  // The caller checks indented_.
+
+  if (!indentation_.empty()) {
+    // In this case, drop newlines too.
+    *sout_ << '\n' << indentString_;
+  }
+}
+
+void BuiltStyledStreamWriter::writeWithIndent(String const& value) {
+  if (!indented_)
+    writeIndent();
+  *sout_ << value;
+  indented_ = false;
+}
+
+void BuiltStyledStreamWriter::indent() { indentString_ += indentation_; }
+
+void BuiltStyledStreamWriter::unindent() {
+  assert(indentString_.size() >= indentation_.size());
+  indentString_.resize(indentString_.size() - indentation_.size());
+}
+
+void BuiltStyledStreamWriter::writeCommentBeforeValue(Value const& root) {
+  if (cs_ == CommentStyle::None)
+    return;
+  if (!root.hasComment(commentBefore))
+    return;
+
+  if (!indented_)
+    writeIndent();
+  const String& comment = root.getComment(commentBefore);
+  String::const_iterator iter = comment.begin();
+  while (iter != comment.end()) {
+    *sout_ << *iter;
+    if (*iter == '\n' && ((iter + 1) != comment.end() && *(iter + 1) == '/'))
+      // writeIndent();  // would write extra newline
+      *sout_ << indentString_;
+    ++iter;
+  }
+  indented_ = false;
+}
+
+void BuiltStyledStreamWriter::writeCommentAfterValueOnSameLine(
+    Value const& root) {
+  if (cs_ == CommentStyle::None)
+    return;
+  if (root.hasComment(commentAfterOnSameLine))
+    *sout_ << " " + root.getComment(commentAfterOnSameLine);
+
+  if (root.hasComment(commentAfter)) {
+    writeIndent();
+    *sout_ << root.getComment(commentAfter);
+  }
+}
+
+// static
+bool BuiltStyledStreamWriter::hasCommentForValue(const Value& value) {
+  return value.hasComment(commentBefore) ||
+         value.hasComment(commentAfterOnSameLine) ||
+         value.hasComment(commentAfter);
+}
+
+///////////////
+// StreamWriter
+
+StreamWriter::StreamWriter() : sout_(nullptr) {}
+StreamWriter::~StreamWriter() = default;
+StreamWriter::Factory::~Factory() = default;
+StreamWriterBuilder::StreamWriterBuilder() { setDefaults(&settings_); }
+StreamWriterBuilder::~StreamWriterBuilder() = default;
+StreamWriter* StreamWriterBuilder::newStreamWriter() const {
+  const String indentation = settings_["indentation"].asString();
+  const String cs_str = settings_["commentStyle"].asString();
+  const String pt_str = settings_["precisionType"].asString();
+  const bool eyc = settings_["enableYAMLCompatibility"].asBool();
+  const bool dnp = settings_["dropNullPlaceholders"].asBool();
+  const bool usf = settings_["useSpecialFloats"].asBool();
+  const bool emitUTF8 = settings_["emitUTF8"].asBool();
+  unsigned int pre = settings_["precision"].asUInt();
+  CommentStyle::Enum cs = CommentStyle::All;
+  if (cs_str == "All") {
+    cs = CommentStyle::All;
+  } else if (cs_str == "None") {
+    cs = CommentStyle::None;
+  } else {
+    throwRuntimeError("commentStyle must be 'All' or 'None'");
+  }
+  PrecisionType precisionType(significantDigits);
+  if (pt_str == "significant") {
+    precisionType = PrecisionType::significantDigits;
+  } else if (pt_str == "decimal") {
+    precisionType = PrecisionType::decimalPlaces;
+  } else {
+    throwRuntimeError("precisionType must be 'significant' or 'decimal'");
+  }
+  String colonSymbol = " : ";
+  if (eyc) {
+    colonSymbol = ": ";
+  } else if (indentation.empty()) {
+    colonSymbol = ":";
+  }
+  String nullSymbol = "null";
+  if (dnp) {
+    nullSymbol.clear();
+  }
+  if (pre > 17)
+    pre = 17;
+  String endingLineFeedSymbol;
+  return new BuiltStyledStreamWriter(indentation, cs, colonSymbol, nullSymbol,
+                                     endingLineFeedSymbol, usf, emitUTF8, pre,
+                                     precisionType);
+}
+
+bool StreamWriterBuilder::validate(Json::Value* invalid) const {
+  static const auto& valid_keys = *new std::set<String>{
+      "indentation",
+      "commentStyle",
+      "enableYAMLCompatibility",
+      "dropNullPlaceholders",
+      "useSpecialFloats",
+      "emitUTF8",
+      "precision",
+      "precisionType",
+  };
+  for (auto si = settings_.begin(); si != settings_.end(); ++si) {
+    auto key = si.name();
+    if (valid_keys.count(key))
+      continue;
+    if (invalid)
+      (*invalid)[key] = *si;
+    else
+      return false;
+  }
+  return invalid ? invalid->empty() : true;
+}
+
+Value& StreamWriterBuilder::operator[](const String& key) {
+  return settings_[key];
+}
+// static
+void StreamWriterBuilder::setDefaults(Json::Value* settings) {
+  //! [StreamWriterBuilderDefaults]
+  (*settings)["commentStyle"] = "All";
+  (*settings)["indentation"] = "\t";
+  (*settings)["enableYAMLCompatibility"] = false;
+  (*settings)["dropNullPlaceholders"] = false;
+  (*settings)["useSpecialFloats"] = false;
+  (*settings)["emitUTF8"] = false;
+  (*settings)["precision"] = 17;
+  (*settings)["precisionType"] = "significant";
+  //! [StreamWriterBuilderDefaults]
+}
+
+String writeString(StreamWriter::Factory const& factory, Value const& root) {
+  OStringStream sout;
+  StreamWriterPtr const writer(factory.newStreamWriter());
+  writer->write(root, &sout);
+  return sout.str();
+}
+
+OStream& operator<<(OStream& sout, Value const& root) {
+  StreamWriterBuilder builder;
+  StreamWriterPtr const writer(builder.newStreamWriter());
+  writer->write(root, &sout);
+  return sout;
+}
+
+} // namespace Json
+
+// //////////////////////////////////////////////////////////////////////
+// End of content of file: src/lib_json/json_writer.cpp
+// //////////////////////////////////////////////////////////////////////
+
+
+
+
+