84 lines
3.0 KiB
Rust
84 lines
3.0 KiB
Rust
const K: [u32; 64] = [
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0x428a2f98, 0x71374491, 0xb5c0fbcf, 0xe9b5dba5, 0x3956c25b, 0x59f111f1, 0x923f82a4, 0xab1c5ed5,
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0xd807aa98, 0x12835b01, 0x243185be, 0x550c7dc3, 0x72be5d74, 0x80deb1fe, 0x9bdc06a7, 0xc19bf174,
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0xe49b69c1, 0xefbe4786, 0x0fc19dc6, 0x240ca1cc, 0x2de92c6f, 0x4a7484aa, 0x5cb0a9dc, 0x76f988da,
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0x983e5152, 0xa831c66d, 0xb00327c8, 0xbf597fc7, 0xc6e00bf3, 0xd5a79147, 0x06ca6351, 0x14292967,
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0x27b70a85, 0x2e1b2138, 0x4d2c6dfc, 0x53380d13, 0x650a7354, 0x766a0abb, 0x81c2c92e, 0x92722c85,
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0xa2bfe8a1, 0xa81a664b, 0xc24b8b70, 0xc76c51a3, 0xd192e819, 0xd6990624, 0xf40e3585, 0x106aa070,
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0x19a4c116, 0x1e376c08, 0x2748774c, 0x34b0bcb5, 0x391c0cb3, 0x4ed8aa4a, 0x5b9cca4f, 0x682e6ff3,
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0x748f82ee, 0x78a5636f, 0x84c87814, 0x8cc70208, 0x90befffa, 0xa4506ceb, 0xbef9a3f7, 0xc67178f2,
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];
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pub fn sha256(data: &[u8]) -> [u8; 32] {
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let mut h: [u32; 8] = [
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0x6a09e667, 0xbb67ae85, 0x3c6ef372, 0xa54ff53a, 0x510e527f, 0x9b05688c, 0x1f83d9ab, 0x5be0cd19,
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];
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let ml = (data.len() as u64) * 8;
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let mut msg = data.to_vec();
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msg.push(0x80);
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while msg.len() % 64 != 56 {
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msg.push(0);
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}
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msg.extend_from_slice(&ml.to_be_bytes());
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for chunk in msg.chunks(64) {
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let mut w = [0u32; 64];
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for i in 0..16 {
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w[i] = u32::from_be_bytes([
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chunk[i * 4],
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chunk[i * 4 + 1],
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chunk[i * 4 + 2],
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chunk[i * 4 + 3],
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]);
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}
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for i in 16..64 {
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let s0 = w[i - 15].rotate_right(7) ^ w[i - 15].rotate_right(18) ^ (w[i - 15] >> 3);
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let s1 = w[i - 2].rotate_right(17) ^ w[i - 2].rotate_right(19) ^ (w[i - 2] >> 10);
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w[i] = w[i - 16]
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.wrapping_add(s0)
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.wrapping_add(w[i - 7])
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.wrapping_add(s1);
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}
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let (mut a, mut b, mut c, mut d, mut e, mut f, mut g, mut hh) =
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(h[0], h[1], h[2], h[3], h[4], h[5], h[6], h[7]);
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for i in 0..64 {
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let s1 = e.rotate_right(6) ^ e.rotate_right(11) ^ e.rotate_right(25);
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let ch = (e & f) ^ ((!e) & g);
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let t1 = hh
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.wrapping_add(s1)
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.wrapping_add(ch)
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.wrapping_add(K[i])
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.wrapping_add(w[i]);
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let s0 = a.rotate_right(2) ^ a.rotate_right(13) ^ a.rotate_right(22);
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let maj = (a & b) ^ (a & c) ^ (b & c);
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let t2 = s0.wrapping_add(maj);
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hh = g;
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g = f;
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f = e;
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e = d.wrapping_add(t1);
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d = c;
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c = b;
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b = a;
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a = t1.wrapping_add(t2);
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}
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h[0] = h[0].wrapping_add(a);
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h[1] = h[1].wrapping_add(b);
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h[2] = h[2].wrapping_add(c);
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h[3] = h[3].wrapping_add(d);
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h[4] = h[4].wrapping_add(e);
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h[5] = h[5].wrapping_add(f);
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h[6] = h[6].wrapping_add(g);
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h[7] = h[7].wrapping_add(hh);
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}
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let mut out = [0u8; 32];
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for i in 0..8 {
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out[i * 4..i * 4 + 4].copy_from_slice(&h[i].to_be_bytes());
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}
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out
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}
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