hsig blake2 calculation
This commit is contained in:
NikVolf
parent
05eaa1d1f6
commit
e4ff0ed671
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@ -40,6 +40,11 @@ dependencies = [
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"xdg 2.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
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]
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[[package]]
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name = "arrayref"
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version = "0.3.5"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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[[package]]
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name = "arrayvec"
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version = "0.4.10"
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@ -126,6 +131,7 @@ version = "0.1.0"
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dependencies = [
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"bellman 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
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"blake2-rfc 0.2.18 (git+https://github.com/gtank/blake2-rfc.git?rev=7a5b5fc99ae483a0043db7547fb79a6fa44b88a9)",
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"blake2b_simd 0.4.1 (git+https://github.com/oconnor663/blake2b_simd.git)",
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"bn 0.4.4 (git+https://github.com/paritytech/bn)",
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"lazy_static 1.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
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"pairing 0.14.2 (registry+https://github.com/rust-lang/crates.io-index)",
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@ -154,6 +160,17 @@ dependencies = [
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"constant_time_eq 0.1.3 (registry+https://github.com/rust-lang/crates.io-index)",
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]
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[[package]]
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name = "blake2b_simd"
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version = "0.4.1"
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source = "git+https://github.com/oconnor663/blake2b_simd.git#b75a0d10e39000fcae18a1f54fab89e2a9a0a1f6"
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dependencies = [
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"arrayref 0.3.5 (registry+https://github.com/rust-lang/crates.io-index)",
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"arrayvec 0.4.10 (registry+https://github.com/rust-lang/crates.io-index)",
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"byteorder 1.2.7 (registry+https://github.com/rust-lang/crates.io-index)",
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"constant_time_eq 0.1.3 (registry+https://github.com/rust-lang/crates.io-index)",
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]
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[[package]]
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name = "bn"
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version = "0.4.4"
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@ -1981,6 +1998,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
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"checksum ansi_term 0.11.0 (registry+https://github.com/rust-lang/crates.io-index)" = "ee49baf6cb617b853aa8d93bf420db2383fab46d314482ca2803b40d5fde979b"
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"checksum ansi_term 0.9.0 (registry+https://github.com/rust-lang/crates.io-index)" = "23ac7c30002a5accbf7e8987d0632fa6de155b7c3d39d0067317a391e00a2ef6"
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"checksum app_dirs 1.2.1 (git+https://github.com/paritytech/app-dirs-rs)" = "<none>"
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"checksum arrayref 0.3.5 (registry+https://github.com/rust-lang/crates.io-index)" = "0d382e583f07208808f6b1249e60848879ba3543f57c32277bf52d69c2f0f0ee"
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"checksum arrayvec 0.4.10 (registry+https://github.com/rust-lang/crates.io-index)" = "92c7fb76bc8826a8b33b4ee5bb07a247a81e76764ab4d55e8f73e3a4d8808c71"
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"checksum assert_matches 1.3.0 (registry+https://github.com/rust-lang/crates.io-index)" = "7deb0a829ca7bcfaf5da70b073a8d128619259a7be8216a355e23f00763059e5"
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"checksum atty 0.2.11 (registry+https://github.com/rust-lang/crates.io-index)" = "9a7d5b8723950951411ee34d271d99dddcc2035a16ab25310ea2c8cfd4369652"
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@ -1991,6 +2009,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
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"checksum bit-vec 0.4.4 (registry+https://github.com/rust-lang/crates.io-index)" = "02b4ff8b16e6076c3e14220b39fbc1fabb6737522281a388998046859400895f"
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"checksum bitflags 1.0.4 (registry+https://github.com/rust-lang/crates.io-index)" = "228047a76f468627ca71776ecdebd732a3423081fcf5125585bcd7c49886ce12"
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"checksum blake2-rfc 0.2.18 (git+https://github.com/gtank/blake2-rfc.git?rev=7a5b5fc99ae483a0043db7547fb79a6fa44b88a9)" = "<none>"
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"checksum blake2b_simd 0.4.1 (git+https://github.com/oconnor663/blake2b_simd.git)" = "<none>"
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"checksum bn 0.4.4 (git+https://github.com/paritytech/bn)" = "<none>"
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"checksum byteorder 1.2.7 (registry+https://github.com/rust-lang/crates.io-index)" = "94f88df23a25417badc922ab0f5716cc1330e87f71ddd9203b3a3ccd9cedf75d"
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"checksum bytes 0.4.11 (registry+https://github.com/rust-lang/crates.io-index)" = "40ade3d27603c2cb345eb0912aec461a6dec7e06a4ae48589904e808335c7afa"
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@ -17,3 +17,4 @@ serde = "1.0"
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serde_derive = "1.0"
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rustc-hex = "2"
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lazy_static = "1.2.0"
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blake2b_simd = { git = "https://github.com/oconnor663/blake2b_simd.git" }
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@ -10,6 +10,7 @@ extern crate rustc_hex as hex;
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pub extern crate bellman;
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pub extern crate pairing;
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pub extern crate sapling_crypto;
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pub extern crate blake2b_simd as blake2;
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#[macro_use] extern crate lazy_static;
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#[macro_use] extern crate serde_derive;
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@ -83,6 +83,7 @@ mod equihash;
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mod error;
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mod sapling;
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mod sigops;
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mod sprout;
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mod timestamp;
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mod work;
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@ -0,0 +1,60 @@
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// blake2 hash of ('ZcashComputehSig', random_seed, nullifier[0], nullifier[1], pub_key_hash)
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pub fn compute_hsig(random_seed: [u8; 32], nullifiers: [[u8; 32]; 2], pub_key_hash: [u8; 32]) -> [u8; 32] {
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use crypto::blake2::Params;
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let res = Params::new()
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.hash_length(32)
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.personal(b"ZcashComputehSig")
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.to_state()
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.update(&random_seed[..])
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.update(&nullifiers[0][..])
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.update(&nullifiers[1][..])
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.update(&pub_key_hash[..])
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.finalize();
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let mut result = [0u8; 32];
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result.copy_from_slice(res.as_bytes());
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result
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}
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#[cfg(test)]
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mod tests {
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use super::compute_hsig;
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fn hash(s: &'static str) -> [u8; 32] {
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use hex::FromHex;
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let bytes: Vec<u8> = s.from_hex().expect(&format!("hash '{}' is not actually a hash somehow", s));
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assert_eq!(bytes.len(), 32);
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let mut result = [0u8; 32];
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result.copy_from_slice(&bytes[..]);
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result
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}
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fn reversed_hash(s: &'static str) -> [u8; 32] {
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use hex::FromHex;
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let mut bytes: Vec<u8> = s.from_hex().expect(&format!("hash '{}' is not actually a hash somehow", s));
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bytes.reverse();
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assert_eq!(bytes.len(), 32);
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let mut result = [0u8; 32];
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result.copy_from_slice(&bytes[..]);
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result
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}
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#[test]
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fn test_vectors() {
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assert_eq!(
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compute_hsig(
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hash("6161616161616161616161616161616161616161616161616161616161616161"),
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[
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hash("6262626262626262626262626262626262626262626262626262626262626262"),
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hash("6363636363636363636363636363636363636363636363636363636363636363"),
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],
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hash("6464646464646464646464646464646464646464646464646464646464646464"),
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),
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reversed_hash("a8cba69f1fa329c055756b4af900f8a00b61e44f4cb8a1824ceb58b90a5b8113"),
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);
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}
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}
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