mirror of
https://github.com/storytold/vectorcraft.git
synced 2026-10-25 02:07:09 -06:00
Matthew FarrowandClaude Sonnet 5.5
75151bd79a
Clippy 1.99.0 added `chunks_exact_to_as_chunks`, which fails `cargo xtask ci` at its clippy step. Eight uses of `chunks_exact(_mut)` with a constant size now use `as_chunks(_mut)` (stable since 1.88, within the 1.95 minimum): four in crates/affinity, three in crates/effects and crates/engine tests, and two in xtask's sha256. docs/development.md says the gate targets the current stable. Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>
59 lines
3.0 KiB
Rust
59 lines
3.0 KiB
Rust
//! SHA-256 (FIPS 180-4), std only, for verifying downloaded test corpora.
|
|
|
|
const K: [u32; 64] = [
|
|
0x428a2f98, 0x71374491, 0xb5c0fbcf, 0xe9b5dba5, 0x3956c25b, 0x59f111f1, 0x923f82a4, 0xab1c5ed5, 0xd807aa98, 0x12835b01, 0x243185be, 0x550c7dc3,
|
|
0x72be5d74, 0x80deb1fe, 0x9bdc06a7, 0xc19bf174, 0xe49b69c1, 0xefbe4786, 0x0fc19dc6, 0x240ca1cc, 0x2de92c6f, 0x4a7484aa, 0x5cb0a9dc, 0x76f988da,
|
|
0x983e5152, 0xa831c66d, 0xb00327c8, 0xbf597fc7, 0xc6e00bf3, 0xd5a79147, 0x06ca6351, 0x14292967, 0x27b70a85, 0x2e1b2138, 0x4d2c6dfc, 0x53380d13,
|
|
0x650a7354, 0x766a0abb, 0x81c2c92e, 0x92722c85, 0xa2bfe8a1, 0xa81a664b, 0xc24b8b70, 0xc76c51a3, 0xd192e819, 0xd6990624, 0xf40e3585, 0x106aa070,
|
|
0x19a4c116, 0x1e376c08, 0x2748774c, 0x34b0bcb5, 0x391c0cb3, 0x4ed8aa4a, 0x5b9cca4f, 0x682e6ff3, 0x748f82ee, 0x78a5636f, 0x84c87814, 0x8cc70208,
|
|
0x90befffa, 0xa4506ceb, 0xbef9a3f7, 0xc67178f2,
|
|
];
|
|
|
|
/// Lower-case hex digest of `data`.
|
|
pub fn hex(data: &[u8]) -> String {
|
|
let mut h: [u32; 8] = [0x6a09e667, 0xbb67ae85, 0x3c6ef372, 0xa54ff53a, 0x510e527f, 0x9b05688c, 0x1f83d9ab, 0x5be0cd19];
|
|
let mut msg = data.to_vec();
|
|
let bits = (data.len() as u64).wrapping_mul(8);
|
|
msg.push(0x80);
|
|
while msg.len() % 64 != 56 {
|
|
msg.push(0);
|
|
}
|
|
msg.extend(bits.to_be_bytes());
|
|
for block in msg.as_chunks::<64>().0.iter() {
|
|
let mut w = [0u32; 64];
|
|
for (i, word) in block.as_chunks::<4>().0.iter().enumerate() {
|
|
w[i] = u32::from_be_bytes(*word);
|
|
}
|
|
for i in 16..64 {
|
|
let s0 = w[i - 15].rotate_right(7) ^ w[i - 15].rotate_right(18) ^ (w[i - 15] >> 3);
|
|
let s1 = w[i - 2].rotate_right(17) ^ w[i - 2].rotate_right(19) ^ (w[i - 2] >> 10);
|
|
w[i] = w[i - 16].wrapping_add(s0).wrapping_add(w[i - 7]).wrapping_add(s1);
|
|
}
|
|
let [mut a, mut b, mut c, mut d, mut e, mut f, mut g, mut hh] = h;
|
|
for i in 0..64 {
|
|
let s1 = e.rotate_right(6) ^ e.rotate_right(11) ^ e.rotate_right(25);
|
|
let ch = (e & f) ^ (!e & g);
|
|
let t1 = hh.wrapping_add(s1).wrapping_add(ch).wrapping_add(K[i]).wrapping_add(w[i]);
|
|
let s0 = a.rotate_right(2) ^ a.rotate_right(13) ^ a.rotate_right(22);
|
|
let maj = (a & b) ^ (a & c) ^ (b & c);
|
|
let t2 = s0.wrapping_add(maj);
|
|
(hh, g, f, e, d, c, b, a) = (g, f, e, d.wrapping_add(t1), c, b, a, t1.wrapping_add(t2));
|
|
}
|
|
for (x, y) in h.iter_mut().zip([a, b, c, d, e, f, g, hh]) {
|
|
*x = x.wrapping_add(y);
|
|
}
|
|
}
|
|
h.iter().map(|x| format!("{x:08x}")).collect()
|
|
}
|
|
|
|
#[cfg(test)]
|
|
mod tests {
|
|
#[test]
|
|
fn known_digests() {
|
|
assert_eq!(super::hex(b""), "e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855");
|
|
assert_eq!(super::hex(b"abc"), "ba7816bf8f01cfea414140de5dae2223b00361a396177a9cb410ff61f20015ad");
|
|
let million = vec![b'a'; 1_000_000];
|
|
assert_eq!(super::hex(&million), "cdc76e5c9914fb9281a1c7e284d73e67f1809a48a497200e046d39ccc7112cd0");
|
|
}
|
|
}
|