#![no_std]
use fixed_array::Array;
use uints::UInt;
pub struct BigSigma(u32, u32, u32);
impl BigSigma {
fn get<I: UInt>(&self, v: I) -> I {
v.ror(self.0) ^ v.ror(self.1) ^ v.ror(self.2)
}
}
pub struct SmallSigma(u32, u32, u8);
impl SmallSigma {
fn get<I: UInt>(&self, v: I) -> I {
v.ror(self.0) ^ v.ror(self.1) ^ (v >> self.2)
}
}
pub type Hash<I> = [I; 8];
type W<I> = [I; 16];
pub trait Item: UInt + Copy + Sized {
type KType: Array<Output = Self>;
const K: Self::KType;
const BIG_S0: BigSigma;
const BIG_S1: BigSigma;
const SMALL_S0: SmallSigma;
const SMALL_S1: SmallSigma;
fn w(a: &Hash<Self>, b: &Hash<Self>) -> W<Self>;
}
impl Item for u32 {
type KType = [Self; 64];
const K: Self::KType = [
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, ];
const BIG_S0: BigSigma = BigSigma(2, 13, 22);
const BIG_S1: BigSigma = BigSigma(6, 11, 25);
const SMALL_S0: SmallSigma = SmallSigma(7, 18, 3);
const SMALL_S1: SmallSigma = SmallSigma(17, 19, 10);
fn w(a: &Hash<Self>, b: &Hash<Self>) -> W<Self> {
[
a[0], a[1], a[2], a[3], a[4], a[5], a[6], a[7], b[0], b[1], b[2], b[3], b[4], b[5], b[6], b[7], ]
}
}
impl Item for u64 {
type KType = [Self; 80];
const K: Self::KType = [
0x428a2f98d728ae22,
0x7137449123ef65cd,
0xb5c0fbcfec4d3b2f,
0xe9b5dba58189dbbc,
0x3956c25bf348b538,
0x59f111f1b605d019,
0x923f82a4af194f9b,
0xab1c5ed5da6d8118,
0xd807aa98a3030242,
0x12835b0145706fbe,
0x243185be4ee4b28c,
0x550c7dc3d5ffb4e2,
0x72be5d74f27b896f,
0x80deb1fe3b1696b1,
0x9bdc06a725c71235,
0xc19bf174cf692694,
0xe49b69c19ef14ad2,
0xefbe4786384f25e3,
0x0fc19dc68b8cd5b5,
0x240ca1cc77ac9c65,
0x2de92c6f592b0275,
0x4a7484aa6ea6e483,
0x5cb0a9dcbd41fbd4,
0x76f988da831153b5,
0x983e5152ee66dfab,
0xa831c66d2db43210,
0xb00327c898fb213f,
0xbf597fc7beef0ee4,
0xc6e00bf33da88fc2,
0xd5a79147930aa725,
0x06ca6351e003826f,
0x142929670a0e6e70,
0x27b70a8546d22ffc,
0x2e1b21385c26c926,
0x4d2c6dfc5ac42aed,
0x53380d139d95b3df,
0x650a73548baf63de,
0x766a0abb3c77b2a8,
0x81c2c92e47edaee6,
0x92722c851482353b,
0xa2bfe8a14cf10364,
0xa81a664bbc423001,
0xc24b8b70d0f89791,
0xc76c51a30654be30,
0xd192e819d6ef5218,
0xd69906245565a910,
0xf40e35855771202a,
0x106aa07032bbd1b8,
0x19a4c116b8d2d0c8,
0x1e376c085141ab53,
0x2748774cdf8eeb99,
0x34b0bcb5e19b48a8,
0x391c0cb3c5c95a63,
0x4ed8aa4ae3418acb,
0x5b9cca4f7763e373,
0x682e6ff3d6b2b8a3,
0x748f82ee5defb2fc,
0x78a5636f43172f60,
0x84c87814a1f0ab72,
0x8cc702081a6439ec,
0x90befffa23631e28,
0xa4506cebde82bde9,
0xbef9a3f7b2c67915,
0xc67178f2e372532b,
0xca273eceea26619c,
0xd186b8c721c0c207,
0xeada7dd6cde0eb1e,
0xf57d4f7fee6ed178,
0x06f067aa72176fba,
0x0a637dc5a2c898a6,
0x113f9804bef90dae,
0x1b710b35131c471b,
0x28db77f523047d84,
0x32caab7b40c72493,
0x3c9ebe0a15c9bebc,
0x431d67c49c100d4c,
0x4cc5d4becb3e42b6,
0x597f299cfc657e2a,
0x5fcb6fab3ad6faec,
0x6c44198c4a475817,
];
const BIG_S0: BigSigma = BigSigma(28, 34, 39);
const BIG_S1: BigSigma = BigSigma(14, 18, 41);
const SMALL_S0: SmallSigma = SmallSigma(1, 8, 7);
const SMALL_S1: SmallSigma = SmallSigma(19, 61, 6);
fn w(a: &Hash<Self>, b: &Hash<Self>) -> W<Self> {
[
a[0], a[1], a[2], a[3], a[4], a[5], a[6], a[7], b[0], b[1], b[2], b[3], b[4], b[5], b[6], b[7], ]
}
}
pub trait Sha2 {
fn compress(&self, h1: &Self, h2: &Self) -> Self;
}
impl<I: Item> Sha2 for Hash<I> {
fn compress(&self, h1: &Hash<I>, h2: &Hash<I>) -> Hash<I> {
let mut a = self[0];
let mut b = self[1];
let mut c = self[2];
let mut d = self[3];
let mut e = self[4];
let mut f = self[5];
let mut g = self[6];
let mut h = self[7];
let mut round = |i: usize, w: I| {
let big_s1 = I::BIG_S1.get(e);
let ch = (e & f) ^ (!e & g);
let temp1 = h
.overflow_add(big_s1)
.overflow_add(ch)
.overflow_add(I::K[i])
.overflow_add(w);
let big_s0 = I::BIG_S0.get(a);
let maj = (a & b) ^ (a & c) ^ (b & c);
let temp2 = big_s0.overflow_add(maj);
h = g;
g = f;
f = e;
e = d.overflow_add(temp1);
d = c;
c = b;
b = a;
a = temp1.overflow_add(temp2);
};
let mut w = I::w(h1, h2);
for i in 0..16 {
round(i, w[i]);
}
for i in 16..I::KType::SIZE {
let i16 = i & 0xF;
let wi = w[i16]
.overflow_add(I::SMALL_S0.get(w[(i + 1) & 0xF]))
.overflow_add(w[(i + 9) & 0xF])
.overflow_add(I::SMALL_S1.get(w[(i + 14) & 0xF]));
w[i16] = wi;
round(i, wi);
}
[
self[0].overflow_add(a),
self[1].overflow_add(b),
self[2].overflow_add(c),
self[3].overflow_add(d),
self[4].overflow_add(e),
self[5].overflow_add(f),
self[6].overflow_add(g),
self[7].overflow_add(h),
]
}
}
pub const SHA256: Hash<u32> = [
0x6a09e667, 0xbb67ae85, 0x3c6ef372, 0xa54ff53a, 0x510e527f, 0x9b05688c, 0x1f83d9ab, 0x5be0cd19,
];
pub const SHA224: Hash<u32> = [
0xc1059ed8, 0x367cd507, 0x3070dd17, 0xf70e5939, 0xffc00b31, 0x68581511, 0x64f98fa7, 0xbefa4fa4,
];
pub const SHA512: Hash<u64> = [
0x6a09e667f3bcc908,
0xbb67ae8584caa73b,
0x3c6ef372fe94f82b,
0xa54ff53a5f1d36f1,
0x510e527fade682d1,
0x9b05688c2b3e6c1f,
0x1f83d9abfb41bd6b,
0x5be0cd19137e2179,
];
pub const SHA384: Hash<u64> = [
0xcbbb9d5dc1059ed8,
0x629a292a367cd507,
0x9159015a3070dd17,
0x152fecd8f70e5939,
0x67332667ffc00b31,
0x8eb44a8768581511,
0xdb0c2e0d64f98fa7,
0x47b5481dbefa4fa4,
];
pub const SHA512_256: Hash<u64> = [
0x22312194FC2BF72C,
0x9F555FA3C84C64C2,
0x2393B86B6F53B151,
0x963877195940EABD,
0x96283EE2A88EFFE3,
0xBE5E1E2553863992,
0x2B0199FC2C85B8AA,
0x0EB72DDC81C52CA2,
];
pub const SHA512_224: Hash<u64> = [
0x8C3D37C819544DA2,
0x73E1996689DCD4D6,
0x1DFAB7AE32FF9C82,
0x679DD514582F9FCF,
0x0F6D2B697BD44DA8,
0x77E36F7304C48942,
0x3F9D85A86A1D36C8,
0x1112E6AD91D692A1,
];
#[cfg(test)]
mod tests {
use super::*;
#[test]
fn sha256() {
let result = SHA256.compress(
&[0x8000_0000, 0, 0, 0, 0, 0, 0, 0],
&[0, 0, 0, 0, 0, 0, 0, 0],
);
assert_eq!(
result,
[
0xe3b0c442, 0x98fc1c14, 0x9afbf4c8, 0x996fb924, 0x27ae41e4, 0x649b934c, 0xa495991b, 0x7852b855, ]
);
}
#[test]
fn sha224() {
let result = SHA224.compress(
&[0x8000_0000, 0, 0, 0, 0, 0, 0, 0],
&[0, 0, 0, 0, 0, 0, 0, 0],
);
assert_eq!(
result[0..7],
[0xd14a028c, 0x2a3a2bc9, 0x476102bb, 0x288234c4, 0x15a2b01f, 0x828ea62a, 0xc5b3e42f]
);
}
#[test]
fn sha512() {
let result = SHA512.compress(
&[0x8000_0000_0000_0000, 0, 0, 0, 0, 0, 0, 0],
&[0, 0, 0, 0, 0, 0, 0, 0],
);
assert_eq!(
result,
[
0xcf83_e135_7eef_b8bd,
0xf154_2850_d66d_8007,
0xd620_e405_0b57_15dc,
0x83f4_a921_d36c_e9ce,
0x47d0_d13c_5d85_f2b0,
0xff83_18d2_877e_ec2f,
0x63b9_31bd_4741_7a81,
0xa538_327a_f927_da3e,
]
);
}
#[test]
fn sha384() {
let result = SHA384.compress(
&[0x8000_0000_0000_0000, 0, 0, 0, 0, 0, 0, 0],
&[0, 0, 0, 0, 0, 0, 0, 0],
);
assert_eq!(
result[0..6],
[
0x38b0_60a7_51ac_9638,
0x4cd9_327e_b1b1_e36a,
0x21fd_b711_14be_0743,
0x4c0c_c7bf_63f6_e1da,
0x274e_debf_e76f_65fb,
0xd51a_d2f1_4898_b95b,
]
);
}
#[test]
fn sha512_256() {
let result = SHA512_256.compress(
&[0x8000_0000_0000_0000, 0, 0, 0, 0, 0, 0, 0],
&[0, 0, 0, 0, 0, 0, 0, 0],
);
assert_eq!(
result[0..4],
[
0xc672_b8d1_ef56_ed28,
0xab87_c362_2c51_1406,
0x9bdd_3ad7_b8f9_7374,
0x98d0_c01e_cef0_967a,
]
);
}
#[test]
fn sha512_224() {
let result = SHA512_224.compress(
&[0x8000_0000_0000_0000, 0, 0, 0, 0, 0, 0, 0],
&[0, 0, 0, 0, 0, 0, 0, 0],
);
assert_eq!(
result[0..3],
[
0x6ed0_dd02_806f_a89e,
0x25de_060c_19d3_ac86,
0xcabb_87d6_a0dd_d05c,
]
);
assert_eq!(result[3] >> 32, 0x333b_84f4,);
}
}