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pqc/common/sha2.c
Thom Wiggers 06955dfc21
Explicit casts in conversions
2019-02-27 16:19:00 +01:00

385 righe
12 KiB
C
Originale Blame Cronologia

/* Based on the public domain implementation in
* crypto_hash/sha512/ref/ from http://bench.cr.yp.to/supercop.html
* by D. J. Bernstein */
#include <stddef.h>
#include <stdint.h>
#include "sha2.h"
static uint64_t load_bigendian(const unsigned char *x) {
return (uint64_t)(x[7]) | (((uint64_t)(x[6])) << 8) | (((uint64_t)(x[5])) << 16) |
(((uint64_t)(x[4])) << 24) | (((uint64_t)(x[3])) << 32) |
(((uint64_t)(x[2])) << 40) | (((uint64_t)(x[1])) << 48) |
(((uint64_t)(x[0])) << 56);
}
static void store_bigendian(uint8_t *x, uint64_t u) {
x[7] = (uint8_t) u;
u >>= 8;
x[6] = (uint8_t) u;
u >>= 8;
x[5] = (uint8_t) u;
u >>= 8;
x[4] = (uint8_t) u;
u >>= 8;
x[3] = (uint8_t) u;
u >>= 8;
x[2] = (uint8_t) u;
u >>= 8;
x[1] = (uint8_t) u;
u >>= 8;
x[0] = (uint8_t) u;
}
#define SHR(x, c) ((x) >> (c))
#define ROTR(x, c) (((x) >> (c)) | ((x) << (64 - (c))))
#define Ch(x, y, z) (((x) & (y)) ^ (~(x) & (z)))
#define Maj(x, y, z) (((x) & (y)) ^ ((x) & (z)) ^ ((y) & (z)))
#define Sigma0(x) (ROTR(x, 28) ^ ROTR(x, 34) ^ ROTR(x, 39))
#define Sigma1(x) (ROTR(x, 14) ^ ROTR(x, 18) ^ ROTR(x, 41))
#define sigma0(x) (ROTR(x, 1) ^ ROTR(x, 8) ^ SHR(x, 7))
#define sigma1(x) (ROTR(x, 19) ^ ROTR(x, 61) ^ SHR(x, 6))
#define M(w0, w14, w9, w1) w0 = sigma1(w14) + (w9) + sigma0(w1) + (w0);
#define EXPAND \
M(w0, w14, w9, w1) \
M(w1, w15, w10, w2) \
M(w2, w0, w11, w3) \
M(w3, w1, w12, w4) \
M(w4, w2, w13, w5) \
M(w5, w3, w14, w6) \
M(w6, w4, w15, w7) \
M(w7, w5, w0, w8) \
M(w8, w6, w1, w9) \
M(w9, w7, w2, w10) \
M(w10, w8, w3, w11) \
M(w11, w9, w4, w12) \
M(w12, w10, w5, w13) \
M(w13, w11, w6, w14) \
M(w14, w12, w7, w15) \
M(w15, w13, w8, w0)
#define F(w, k) \
T1 = h + Sigma1(e) + Ch(e, f, g) + (k) + (w); \
T2 = Sigma0(a) + Maj(a, b, c); \
h = g; \
g = f; \
f = e; \
e = d + T1; \
d = c; \
c = b; \
b = a; \
a = T1 + T2;
static size_t crypto_hashblocks_sha512(uint8_t *statebytes,
const uint8_t *in,
size_t inlen) {
uint64_t state[8];
uint64_t a;
uint64_t b;
uint64_t c;
uint64_t d;
uint64_t e;
uint64_t f;
uint64_t g;
uint64_t h;
uint64_t T1;
uint64_t T2;
a = load_bigendian(statebytes + 0);
state[0] = a;
b = load_bigendian(statebytes + 8);
state[1] = b;
c = load_bigendian(statebytes + 16);
state[2] = c;
d = load_bigendian(statebytes + 24);
state[3] = d;
e = load_bigendian(statebytes + 32);
state[4] = e;
f = load_bigendian(statebytes + 40);
state[5] = f;
g = load_bigendian(statebytes + 48);
state[6] = g;
h = load_bigendian(statebytes + 56);
state[7] = h;
while (inlen >= 128) {
uint64_t w0 = load_bigendian(in + 0);
uint64_t w1 = load_bigendian(in + 8);
uint64_t w2 = load_bigendian(in + 16);
uint64_t w3 = load_bigendian(in + 24);
uint64_t w4 = load_bigendian(in + 32);
uint64_t w5 = load_bigendian(in + 40);
uint64_t w6 = load_bigendian(in + 48);
uint64_t w7 = load_bigendian(in + 56);
uint64_t w8 = load_bigendian(in + 64);
uint64_t w9 = load_bigendian(in + 72);
uint64_t w10 = load_bigendian(in + 80);
uint64_t w11 = load_bigendian(in + 88);
uint64_t w12 = load_bigendian(in + 96);
uint64_t w13 = load_bigendian(in + 104);
uint64_t w14 = load_bigendian(in + 112);
uint64_t w15 = load_bigendian(in + 120);
F(w0, 0x428a2f98d728ae22ULL)
F(w1, 0x7137449123ef65cdULL)
F(w2, 0xb5c0fbcfec4d3b2fULL)
F(w3, 0xe9b5dba58189dbbcULL)
F(w4, 0x3956c25bf348b538ULL)
F(w5, 0x59f111f1b605d019ULL)
F(w6, 0x923f82a4af194f9bULL)
F(w7, 0xab1c5ed5da6d8118ULL)
F(w8, 0xd807aa98a3030242ULL)
F(w9, 0x12835b0145706fbeULL)
F(w10, 0x243185be4ee4b28cULL)
F(w11, 0x550c7dc3d5ffb4e2ULL)
F(w12, 0x72be5d74f27b896fULL)
F(w13, 0x80deb1fe3b1696b1ULL)
F(w14, 0x9bdc06a725c71235ULL)
F(w15, 0xc19bf174cf692694ULL)
EXPAND
F(w0, 0xe49b69c19ef14ad2ULL)
F(w1, 0xefbe4786384f25e3ULL)
F(w2, 0x0fc19dc68b8cd5b5ULL)
F(w3, 0x240ca1cc77ac9c65ULL)
F(w4, 0x2de92c6f592b0275ULL)
F(w5, 0x4a7484aa6ea6e483ULL)
F(w6, 0x5cb0a9dcbd41fbd4ULL)
F(w7, 0x76f988da831153b5ULL)
F(w8, 0x983e5152ee66dfabULL)
F(w9, 0xa831c66d2db43210ULL)
F(w10, 0xb00327c898fb213fULL)
F(w11, 0xbf597fc7beef0ee4ULL)
F(w12, 0xc6e00bf33da88fc2ULL)
F(w13, 0xd5a79147930aa725ULL)
F(w14, 0x06ca6351e003826fULL)
F(w15, 0x142929670a0e6e70ULL)
EXPAND
F(w0, 0x27b70a8546d22ffcULL)
F(w1, 0x2e1b21385c26c926ULL)
F(w2, 0x4d2c6dfc5ac42aedULL)
F(w3, 0x53380d139d95b3dfULL)
F(w4, 0x650a73548baf63deULL)
F(w5, 0x766a0abb3c77b2a8ULL)
F(w6, 0x81c2c92e47edaee6ULL)
F(w7, 0x92722c851482353bULL)
F(w8, 0xa2bfe8a14cf10364ULL)
F(w9, 0xa81a664bbc423001ULL)
F(w10, 0xc24b8b70d0f89791ULL)
F(w11, 0xc76c51a30654be30ULL)
F(w12, 0xd192e819d6ef5218ULL)
F(w13, 0xd69906245565a910ULL)
F(w14, 0xf40e35855771202aULL)
F(w15, 0x106aa07032bbd1b8ULL)
EXPAND
F(w0, 0x19a4c116b8d2d0c8ULL)
F(w1, 0x1e376c085141ab53ULL)
F(w2, 0x2748774cdf8eeb99ULL)
F(w3, 0x34b0bcb5e19b48a8ULL)
F(w4, 0x391c0cb3c5c95a63ULL)
F(w5, 0x4ed8aa4ae3418acbULL)
F(w6, 0x5b9cca4f7763e373ULL)
F(w7, 0x682e6ff3d6b2b8a3ULL)
F(w8, 0x748f82ee5defb2fcULL)
F(w9, 0x78a5636f43172f60ULL)
F(w10, 0x84c87814a1f0ab72ULL)
F(w11, 0x8cc702081a6439ecULL)
F(w12, 0x90befffa23631e28ULL)
F(w13, 0xa4506cebde82bde9ULL)
F(w14, 0xbef9a3f7b2c67915ULL)
F(w15, 0xc67178f2e372532bULL)
EXPAND
F(w0, 0xca273eceea26619cULL)
F(w1, 0xd186b8c721c0c207ULL)
F(w2, 0xeada7dd6cde0eb1eULL)
F(w3, 0xf57d4f7fee6ed178ULL)
F(w4, 0x06f067aa72176fbaULL)
F(w5, 0x0a637dc5a2c898a6ULL)
F(w6, 0x113f9804bef90daeULL)
F(w7, 0x1b710b35131c471bULL)
F(w8, 0x28db77f523047d84ULL)
F(w9, 0x32caab7b40c72493ULL)
F(w10, 0x3c9ebe0a15c9bebcULL)
F(w11, 0x431d67c49c100d4cULL)
F(w12, 0x4cc5d4becb3e42b6ULL)
F(w13, 0x597f299cfc657e2aULL)
F(w14, 0x5fcb6fab3ad6faecULL)
F(w15, 0x6c44198c4a475817ULL)
a += state[0];
b += state[1];
c += state[2];
d += state[3];
e += state[4];
f += state[5];
g += state[6];
h += state[7];
state[0] = a;
state[1] = b;
state[2] = c;
state[3] = d;
state[4] = e;
state[5] = f;
state[6] = g;
state[7] = h;
in += 128;
inlen -= 128;
}
store_bigendian(statebytes + 0, state[0]);
store_bigendian(statebytes + 8, state[1]);
store_bigendian(statebytes + 16, state[2]);
store_bigendian(statebytes + 24, state[3]);
store_bigendian(statebytes + 32, state[4]);
store_bigendian(statebytes + 40, state[5]);
store_bigendian(statebytes + 48, state[6]);
store_bigendian(statebytes + 56, state[7]);
return inlen;
}
#define blocks crypto_hashblocks_sha512
static const uint8_t iv_384[64] = {
0xcb, 0xbb, 0x9d, 0x5d, 0xc1, 0x05, 0x9e, 0xd8, 0x62, 0x9a, 0x29,
0x2a, 0x36, 0x7c, 0xd5, 0x07, 0x91, 0x59, 0x01, 0x5a, 0x30, 0x70,
0xdd, 0x17, 0x15, 0x2f, 0xec, 0xd8, 0xf7, 0x0e, 0x59, 0x39, 0x67,
0x33, 0x26, 0x67, 0xff, 0xc0, 0x0b, 0x31, 0x8e, 0xb4, 0x4a, 0x87,
0x68, 0x58, 0x15, 0x11, 0xdb, 0x0c, 0x2e, 0x0d, 0x64, 0xf9, 0x8f,
0xa7, 0x47, 0xb5, 0x48, 0x1d, 0xbe, 0xfa, 0x4f, 0xa4
};
static const uint8_t iv_512[64] = {
0x6a, 0x09, 0xe6, 0x67, 0xf3, 0xbc, 0xc9, 0x08, 0xbb, 0x67, 0xae,
0x85, 0x84, 0xca, 0xa7, 0x3b, 0x3c, 0x6e, 0xf3, 0x72, 0xfe, 0x94,
0xf8, 0x2b, 0xa5, 0x4f, 0xf5, 0x3a, 0x5f, 0x1d, 0x36, 0xf1, 0x51,
0x0e, 0x52, 0x7f, 0xad, 0xe6, 0x82, 0xd1, 0x9b, 0x05, 0x68, 0x8c,
0x2b, 0x3e, 0x6c, 0x1f, 0x1f, 0x83, 0xd9, 0xab, 0xfb, 0x41, 0xbd,
0x6b, 0x5b, 0xe0, 0xcd, 0x19, 0x13, 0x7e, 0x21, 0x79
};
int sha384(uint8_t *out, const uint8_t *in, size_t inlen) {
uint8_t h[64];
uint8_t padded[256];
uint64_t bytes = inlen;
for (size_t i = 0; i < 64; ++i) {
h[i] = iv_384[i];
}
blocks(h, in, inlen);
in += inlen;
inlen &= 127;
in -= inlen;
for (size_t i = 0; i < inlen; ++i) {
padded[i] = in[i];
}
padded[inlen] = 0x80;
if (inlen < 112) {
for (size_t i = inlen + 1; i < 119; ++i) {
padded[i] = 0;
}
padded[119] = (uint8_t) (bytes >> 61);
padded[120] = (uint8_t) (bytes >> 53);
padded[121] = (uint8_t) (bytes >> 45);
padded[122] = (uint8_t) (bytes >> 37);
padded[123] = (uint8_t) (bytes >> 29);
padded[124] = (uint8_t) (bytes >> 21);
padded[125] = (uint8_t) (bytes >> 13);
padded[126] = (uint8_t) (bytes >> 5);
padded[127] = (uint8_t) (bytes << 3);
blocks(h, padded, 128);
} else {
for (size_t i = inlen + 1; i < 247; ++i) {
padded[i] = 0;
}
padded[247] = (uint8_t) (bytes >> 61);
padded[248] = (uint8_t) (bytes >> 53);
padded[249] = (uint8_t) (bytes >> 45);
padded[250] = (uint8_t) (bytes >> 37);
padded[251] = (uint8_t) (bytes >> 29);
padded[252] = (uint8_t) (bytes >> 21);
padded[253] = (uint8_t) (bytes >> 13);
padded[254] = (uint8_t) (bytes >> 5);
padded[255] = (uint8_t) (bytes << 3);
blocks(h, padded, 256);
}
for (size_t i = 0; i < 48; ++i) {
out[i] = h[i];
}
return 0;
}
int sha512(uint8_t *out, const uint8_t *in, size_t inlen) {
uint8_t h[64];
uint8_t padded[256];
uint64_t bytes = inlen;
for (size_t i = 0; i < 64; ++i) {
h[i] = iv_512[i];
}
blocks(h, in, inlen);
in += inlen;
inlen &= 127;
in -= inlen;
for (size_t i = 0; i < inlen; ++i) {
padded[i] = in[i];
}
padded[inlen] = 0x80;
if (inlen < 112) {
for (size_t i = inlen + 1; i < 119; ++i) {
padded[i] = 0;
}
padded[119] = (uint8_t) (bytes >> 61);
padded[120] = (uint8_t) (bytes >> 53);
padded[121] = (uint8_t) (bytes >> 45);
padded[122] = (uint8_t) (bytes >> 37);
padded[123] = (uint8_t) (bytes >> 29);
padded[124] = (uint8_t) (bytes >> 21);
padded[125] = (uint8_t) (bytes >> 13);
padded[126] = (uint8_t) (bytes >> 5);
padded[127] = (uint8_t) (bytes << 3);
blocks(h, padded, 128);
} else {
for (size_t i = inlen + 1; i < 247; ++i) {
padded[i] = 0;
}
padded[247] = (uint8_t) (bytes >> 61);
padded[248] = (uint8_t) (bytes >> 53);
padded[249] = (uint8_t) (bytes >> 45);
padded[250] = (uint8_t) (bytes >> 37);
padded[251] = (uint8_t) (bytes >> 29);
padded[252] = (uint8_t) (bytes >> 21);
padded[253] = (uint8_t) (bytes >> 13);
padded[254] = (uint8_t) (bytes >> 5);
padded[255] = (uint8_t) (bytes << 3);
blocks(h, padded, 256);
}
for (size_t i = 0; i < 64; ++i) {
out[i] = h[i];
}
return 0;
}
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