sha512.c (5256B)
- // SPDX-FileCopyrightText: public domain sha512 implementation based on fips180-3
- // SPDX-License-Identifier: 0BSD
- #include "sha512.h"
- #include <ctype.h>
- #include <stdint.h>
- #include <stdio.h>
- #include <stdlib.h>
- #include <string.h>
- static uint64_t
- ror(uint64_t n, int k)
- {
- return (n >> k) | (n << (64 - k));
- }
- #define Ch(x, y, z) (z ^ (x & (y ^ z)))
- #define Maj(x, y, z) ((x & y) | (z & (x | y)))
- #define S0(x) (ror(x, 28) ^ ror(x, 34) ^ ror(x, 39))
- #define S1(x) (ror(x, 14) ^ ror(x, 18) ^ ror(x, 41))
- #define R0(x) (ror(x, 1) ^ ror(x, 8) ^ (x >> 7))
- #define R1(x) (ror(x, 19) ^ ror(x, 61) ^ (x >> 6))
- static const uint64_t K[80] = {
- 0x428a2f98d728ae22ULL, 0x7137449123ef65cdULL, 0xb5c0fbcfec4d3b2fULL, 0xe9b5dba58189dbbcULL,
- 0x3956c25bf348b538ULL, 0x59f111f1b605d019ULL, 0x923f82a4af194f9bULL, 0xab1c5ed5da6d8118ULL,
- 0xd807aa98a3030242ULL, 0x12835b0145706fbeULL, 0x243185be4ee4b28cULL, 0x550c7dc3d5ffb4e2ULL,
- 0x72be5d74f27b896fULL, 0x80deb1fe3b1696b1ULL, 0x9bdc06a725c71235ULL, 0xc19bf174cf692694ULL,
- 0xe49b69c19ef14ad2ULL, 0xefbe4786384f25e3ULL, 0x0fc19dc68b8cd5b5ULL, 0x240ca1cc77ac9c65ULL,
- 0x2de92c6f592b0275ULL, 0x4a7484aa6ea6e483ULL, 0x5cb0a9dcbd41fbd4ULL, 0x76f988da831153b5ULL,
- 0x983e5152ee66dfabULL, 0xa831c66d2db43210ULL, 0xb00327c898fb213fULL, 0xbf597fc7beef0ee4ULL,
- 0xc6e00bf33da88fc2ULL, 0xd5a79147930aa725ULL, 0x06ca6351e003826fULL, 0x142929670a0e6e70ULL,
- 0x27b70a8546d22ffcULL, 0x2e1b21385c26c926ULL, 0x4d2c6dfc5ac42aedULL, 0x53380d139d95b3dfULL,
- 0x650a73548baf63deULL, 0x766a0abb3c77b2a8ULL, 0x81c2c92e47edaee6ULL, 0x92722c851482353bULL,
- 0xa2bfe8a14cf10364ULL, 0xa81a664bbc423001ULL, 0xc24b8b70d0f89791ULL, 0xc76c51a30654be30ULL,
- 0xd192e819d6ef5218ULL, 0xd69906245565a910ULL, 0xf40e35855771202aULL, 0x106aa07032bbd1b8ULL,
- 0x19a4c116b8d2d0c8ULL, 0x1e376c085141ab53ULL, 0x2748774cdf8eeb99ULL, 0x34b0bcb5e19b48a8ULL,
- 0x391c0cb3c5c95a63ULL, 0x4ed8aa4ae3418acbULL, 0x5b9cca4f7763e373ULL, 0x682e6ff3d6b2b8a3ULL,
- 0x748f82ee5defb2fcULL, 0x78a5636f43172f60ULL, 0x84c87814a1f0ab72ULL, 0x8cc702081a6439ecULL,
- 0x90befffa23631e28ULL, 0xa4506cebde82bde9ULL, 0xbef9a3f7b2c67915ULL, 0xc67178f2e372532bULL,
- 0xca273eceea26619cULL, 0xd186b8c721c0c207ULL, 0xeada7dd6cde0eb1eULL, 0xf57d4f7fee6ed178ULL,
- 0x06f067aa72176fbaULL, 0x0a637dc5a2c898a6ULL, 0x113f9804bef90daeULL, 0x1b710b35131c471bULL,
- 0x28db77f523047d84ULL, 0x32caab7b40c72493ULL, 0x3c9ebe0a15c9bebcULL, 0x431d67c49c100d4cULL,
- 0x4cc5d4becb3e42b6ULL, 0x597f299cfc657e2aULL, 0x5fcb6fab3ad6faecULL, 0x6c44198c4a475817ULL};
- static void
- processblock(struct sha512 *s, const uint8_t *buf)
- {
- uint64_t W[80], t1, t2, a, b, c, d, e, f, g, h;
- int i;
- for(i = 0; i < 16; i++)
- {
- W[i] = (uint64_t)buf[8 * i] << 56;
- W[i] |= (uint64_t)buf[8 * i + 1] << 48;
- W[i] |= (uint64_t)buf[8 * i + 2] << 40;
- W[i] |= (uint64_t)buf[8 * i + 3] << 32;
- W[i] |= (uint64_t)buf[8 * i + 4] << 24;
- W[i] |= (uint64_t)buf[8 * i + 5] << 16;
- W[i] |= (uint64_t)buf[8 * i + 6] << 8;
- W[i] |= buf[8 * i + 7];
- }
- for(; i < 80; i++)
- W[i] = R1(W[i - 2]) + W[i - 7] + R0(W[i - 15]) + W[i - 16];
- a = s->h[0];
- b = s->h[1];
- c = s->h[2];
- d = s->h[3];
- e = s->h[4];
- f = s->h[5];
- g = s->h[6];
- h = s->h[7];
- for(i = 0; i < 80; i++)
- {
- t1 = h + S1(e) + Ch(e, f, g) + K[i] + W[i];
- t2 = S0(a) + Maj(a, b, c);
- h = g;
- g = f;
- f = e;
- e = d + t1;
- d = c;
- c = b;
- b = a;
- a = t1 + t2;
- }
- s->h[0] += a;
- s->h[1] += b;
- s->h[2] += c;
- s->h[3] += d;
- s->h[4] += e;
- s->h[5] += f;
- s->h[6] += g;
- s->h[7] += h;
- }
- static void
- pad(struct sha512 *s)
- {
- unsigned r = s->len % 128;
- s->buf[r++] = 0x80;
- if(r > 112)
- {
- memset(s->buf + r, 0, 128 - r);
- r = 0;
- processblock(s, s->buf);
- }
- memset(s->buf + r, 0, 120 - r);
- s->len *= 8;
- s->buf[120] = s->len >> 56;
- s->buf[121] = s->len >> 48;
- s->buf[122] = s->len >> 40;
- s->buf[123] = s->len >> 32;
- s->buf[124] = s->len >> 24;
- s->buf[125] = s->len >> 16;
- s->buf[126] = s->len >> 8;
- s->buf[127] = s->len;
- processblock(s, s->buf);
- }
- void
- sha512_init(void *ctx)
- {
- struct sha512 *s = ctx;
- s->len = 0;
- s->h[0] = 0x6a09e667f3bcc908ULL;
- s->h[1] = 0xbb67ae8584caa73bULL;
- s->h[2] = 0x3c6ef372fe94f82bULL;
- s->h[3] = 0xa54ff53a5f1d36f1ULL;
- s->h[4] = 0x510e527fade682d1ULL;
- s->h[5] = 0x9b05688c2b3e6c1fULL;
- s->h[6] = 0x1f83d9abfb41bd6bULL;
- s->h[7] = 0x5be0cd19137e2179ULL;
- }
- void
- sha512_sum_n(void *ctx, uint8_t *md, int n)
- {
- struct sha512 *s = ctx;
- int i;
- pad(s);
- for(i = 0; i < n; i++)
- {
- md[8 * i] = s->h[i] >> 56;
- md[8 * i + 1] = s->h[i] >> 48;
- md[8 * i + 2] = s->h[i] >> 40;
- md[8 * i + 3] = s->h[i] >> 32;
- md[8 * i + 4] = s->h[i] >> 24;
- md[8 * i + 5] = s->h[i] >> 16;
- md[8 * i + 6] = s->h[i] >> 8;
- md[8 * i + 7] = s->h[i];
- }
- }
- void
- sha512_sum(void *ctx, uint8_t md[SHA512_DIGEST_LENGTH])
- {
- sha512_sum_n(ctx, md, 8);
- }
- void
- sha512_update(void *ctx, const void *m, unsigned long len)
- {
- struct sha512 *s = ctx;
- const uint8_t *p = m;
- unsigned r = s->len % 128;
- s->len += len;
- if(r)
- {
- if(len < 128 - r)
- {
- memcpy(s->buf + r, p, len);
- return;
- }
- memcpy(s->buf + r, p, 128 - r);
- len -= 128 - r;
- p += 128 - r;
- processblock(s, s->buf);
- }
- for(; len >= 128; len -= 128, p += 128)
- processblock(s, p);
- memcpy(s->buf, p, len);
- }