sha512.c (5041B)
1 /* public domain sha256 implementation based on fips180-3 */ 2 3 #include <ctype.h> 4 #include <stdint.h> 5 #include <stdio.h> 6 #include <stdlib.h> 7 #include <string.h> 8 9 #include "../sha512.h" 10 11 static uint64_t ror(uint64_t n, int k) { return (n >> k) | (n << (64-k)); } 12 #define Ch(x,y,z) (z ^ (x & (y ^ z))) 13 #define Maj(x,y,z) ((x & y) | (z & (x | y))) 14 #define S0(x) (ror(x,28) ^ ror(x,34) ^ ror(x,39)) 15 #define S1(x) (ror(x,14) ^ ror(x,18) ^ ror(x,41)) 16 #define R0(x) (ror(x,1) ^ ror(x,8) ^ (x>>7)) 17 #define R1(x) (ror(x,19) ^ ror(x,61) ^ (x>>6)) 18 19 static const uint64_t K[80] = { 20 0x428a2f98d728ae22ULL, 0x7137449123ef65cdULL, 0xb5c0fbcfec4d3b2fULL, 0xe9b5dba58189dbbcULL, 21 0x3956c25bf348b538ULL, 0x59f111f1b605d019ULL, 0x923f82a4af194f9bULL, 0xab1c5ed5da6d8118ULL, 22 0xd807aa98a3030242ULL, 0x12835b0145706fbeULL, 0x243185be4ee4b28cULL, 0x550c7dc3d5ffb4e2ULL, 23 0x72be5d74f27b896fULL, 0x80deb1fe3b1696b1ULL, 0x9bdc06a725c71235ULL, 0xc19bf174cf692694ULL, 24 0xe49b69c19ef14ad2ULL, 0xefbe4786384f25e3ULL, 0x0fc19dc68b8cd5b5ULL, 0x240ca1cc77ac9c65ULL, 25 0x2de92c6f592b0275ULL, 0x4a7484aa6ea6e483ULL, 0x5cb0a9dcbd41fbd4ULL, 0x76f988da831153b5ULL, 26 0x983e5152ee66dfabULL, 0xa831c66d2db43210ULL, 0xb00327c898fb213fULL, 0xbf597fc7beef0ee4ULL, 27 0xc6e00bf33da88fc2ULL, 0xd5a79147930aa725ULL, 0x06ca6351e003826fULL, 0x142929670a0e6e70ULL, 28 0x27b70a8546d22ffcULL, 0x2e1b21385c26c926ULL, 0x4d2c6dfc5ac42aedULL, 0x53380d139d95b3dfULL, 29 0x650a73548baf63deULL, 0x766a0abb3c77b2a8ULL, 0x81c2c92e47edaee6ULL, 0x92722c851482353bULL, 30 0xa2bfe8a14cf10364ULL, 0xa81a664bbc423001ULL, 0xc24b8b70d0f89791ULL, 0xc76c51a30654be30ULL, 31 0xd192e819d6ef5218ULL, 0xd69906245565a910ULL, 0xf40e35855771202aULL, 0x106aa07032bbd1b8ULL, 32 0x19a4c116b8d2d0c8ULL, 0x1e376c085141ab53ULL, 0x2748774cdf8eeb99ULL, 0x34b0bcb5e19b48a8ULL, 33 0x391c0cb3c5c95a63ULL, 0x4ed8aa4ae3418acbULL, 0x5b9cca4f7763e373ULL, 0x682e6ff3d6b2b8a3ULL, 34 0x748f82ee5defb2fcULL, 0x78a5636f43172f60ULL, 0x84c87814a1f0ab72ULL, 0x8cc702081a6439ecULL, 35 0x90befffa23631e28ULL, 0xa4506cebde82bde9ULL, 0xbef9a3f7b2c67915ULL, 0xc67178f2e372532bULL, 36 0xca273eceea26619cULL, 0xd186b8c721c0c207ULL, 0xeada7dd6cde0eb1eULL, 0xf57d4f7fee6ed178ULL, 37 0x06f067aa72176fbaULL, 0x0a637dc5a2c898a6ULL, 0x113f9804bef90daeULL, 0x1b710b35131c471bULL, 38 0x28db77f523047d84ULL, 0x32caab7b40c72493ULL, 0x3c9ebe0a15c9bebcULL, 0x431d67c49c100d4cULL, 39 0x4cc5d4becb3e42b6ULL, 0x597f299cfc657e2aULL, 0x5fcb6fab3ad6faecULL, 0x6c44198c4a475817ULL 40 }; 41 42 static void 43 processblock(struct sha512 *s, const uint8_t *buf) 44 { 45 uint64_t W[80], t1, t2, a, b, c, d, e, f, g, h; 46 int i; 47 48 for (i = 0; i < 16; i++) { 49 W[i] = (uint64_t)buf[8*i]<<56; 50 W[i] |= (uint64_t)buf[8*i+1]<<48; 51 W[i] |= (uint64_t)buf[8*i+2]<<40; 52 W[i] |= (uint64_t)buf[8*i+3]<<32; 53 W[i] |= (uint64_t)buf[8*i+4]<<24; 54 W[i] |= (uint64_t)buf[8*i+5]<<16; 55 W[i] |= (uint64_t)buf[8*i+6]<<8; 56 W[i] |= buf[8*i+7]; 57 } 58 for (; i < 80; i++) 59 W[i] = R1(W[i-2]) + W[i-7] + R0(W[i-15]) + W[i-16]; 60 a = s->h[0]; 61 b = s->h[1]; 62 c = s->h[2]; 63 d = s->h[3]; 64 e = s->h[4]; 65 f = s->h[5]; 66 g = s->h[6]; 67 h = s->h[7]; 68 for (i = 0; i < 80; i++) { 69 t1 = h + S1(e) + Ch(e,f,g) + K[i] + W[i]; 70 t2 = S0(a) + Maj(a,b,c); 71 h = g; 72 g = f; 73 f = e; 74 e = d + t1; 75 d = c; 76 c = b; 77 b = a; 78 a = t1 + t2; 79 } 80 s->h[0] += a; 81 s->h[1] += b; 82 s->h[2] += c; 83 s->h[3] += d; 84 s->h[4] += e; 85 s->h[5] += f; 86 s->h[6] += g; 87 s->h[7] += h; 88 } 89 90 static void 91 pad(struct sha512 *s) 92 { 93 unsigned r = s->len % 128; 94 95 s->buf[r++] = 0x80; 96 if (r > 112) { 97 memset(s->buf + r, 0, 128 - r); 98 r = 0; 99 processblock(s, s->buf); 100 } 101 memset(s->buf + r, 0, 120 - r); 102 s->len *= 8; 103 s->buf[120] = s->len >> 56; 104 s->buf[121] = s->len >> 48; 105 s->buf[122] = s->len >> 40; 106 s->buf[123] = s->len >> 32; 107 s->buf[124] = s->len >> 24; 108 s->buf[125] = s->len >> 16; 109 s->buf[126] = s->len >> 8; 110 s->buf[127] = s->len; 111 processblock(s, s->buf); 112 } 113 114 void 115 sha512_init(void *ctx) 116 { 117 struct sha512 *s = ctx; 118 s->len = 0; 119 s->h[0] = 0x6a09e667f3bcc908ULL; 120 s->h[1] = 0xbb67ae8584caa73bULL; 121 s->h[2] = 0x3c6ef372fe94f82bULL; 122 s->h[3] = 0xa54ff53a5f1d36f1ULL; 123 s->h[4] = 0x510e527fade682d1ULL; 124 s->h[5] = 0x9b05688c2b3e6c1fULL; 125 s->h[6] = 0x1f83d9abfb41bd6bULL; 126 s->h[7] = 0x5be0cd19137e2179ULL; 127 } 128 129 void 130 sha512_sum_n(void *ctx, uint8_t *md, int n) 131 { 132 struct sha512 *s = ctx; 133 int i; 134 135 pad(s); 136 for (i = 0; i < n; i++) { 137 md[8*i] = s->h[i] >> 56; 138 md[8*i+1] = s->h[i] >> 48; 139 md[8*i+2] = s->h[i] >> 40; 140 md[8*i+3] = s->h[i] >> 32; 141 md[8*i+4] = s->h[i] >> 24; 142 md[8*i+5] = s->h[i] >> 16; 143 md[8*i+6] = s->h[i] >> 8; 144 md[8*i+7] = s->h[i]; 145 } 146 } 147 148 void 149 sha512_sum(void *ctx, uint8_t md[SHA512_DIGEST_LENGTH]) 150 { 151 sha512_sum_n(ctx, md, 8); 152 } 153 154 void 155 sha512_update(void *ctx, const void *m, unsigned long len) 156 { 157 struct sha512 *s = ctx; 158 const uint8_t *p = m; 159 unsigned r = s->len % 128; 160 161 s->len += len; 162 if (r) { 163 if (len < 128 - r) { 164 memcpy(s->buf + r, p, len); 165 return; 166 } 167 memcpy(s->buf + r, p, 128 - r); 168 len -= 128 - r; 169 p += 128 - r; 170 processblock(s, s->buf); 171 } 172 for (; len >= 128; len -= 128, p += 128) 173 processblock(s, p); 174 memcpy(s->buf, p, len); 175 }