1 /* 2 * Cryptographic API. 3 * 4 * SHA-256, as specified in 5 * http://csrc.nist.gov/cryptval/shs/sha256-384-512.pdf 6 * 7 * SHA-256 code by Jean-Luc Cooke <jlcooke (at) certainkey.com>. 8 * 9 * Copyright (c) Jean-Luc Cooke <jlcooke (at) certainkey.com> 10 * Copyright (c) Andrew McDonald <andrew (at) mcdonald.org.uk> 11 * Copyright (c) 2002 James Morris <jmorris (at) intercode.com.au> 12 * 13 * This program is free software; you can redistribute it and/or modify it 14 * under the terms of the GNU General Public License as published by the Free 15 * Software Foundation; either version 2 of the License, or (at your option) 16 * any later version. 17 * 18 */ 19 #include <string.h> 20 #include <inttypes.h> 21 22 #include "../lib/bswap.h" 23 #include "sha256.h" 24 25 #define SHA256_DIGEST_SIZE 32 26 #define SHA256_HMAC_BLOCK_SIZE 64 27 28 static inline uint32_t Ch(uint32_t x, uint32_t y, uint32_t z) 29 { 30 return z ^ (x & (y ^ z)); 31 } 32 33 static inline uint32_t Maj(uint32_t x, uint32_t y, uint32_t z) 34 { 35 return (x & y) | (z & (x | y)); 36 } 37 38 #define e0(x) (ror32(x, 2) ^ ror32(x,13) ^ ror32(x,22)) 39 #define e1(x) (ror32(x, 6) ^ ror32(x,11) ^ ror32(x,25)) 40 #define s0(x) (ror32(x, 7) ^ ror32(x,18) ^ (x >> 3)) 41 #define s1(x) (ror32(x,17) ^ ror32(x,19) ^ (x >> 10)) 42 43 #define H0 0x6a09e667 44 #define H1 0xbb67ae85 45 #define H2 0x3c6ef372 46 #define H3 0xa54ff53a 47 #define H4 0x510e527f 48 #define H5 0x9b05688c 49 #define H6 0x1f83d9ab 50 #define H7 0x5be0cd19 51 52 static inline uint32_t ror32(uint32_t word, unsigned int shift) 53 { 54 return (word >> shift) | (word << (32 - shift)); 55 } 56 57 static inline void LOAD_OP(int I, uint32_t *W, const uint8_t *input) 58 { 59 W[I] = __be32_to_cpu(((uint32_t *)(input))[I]); 60 } 61 62 static inline void BLEND_OP(int I, uint32_t *W) 63 { 64 W[I] = s1(W[I-2]) + W[I-7] + s0(W[I-15]) + W[I-16]; 65 } 66 67 static void sha256_transform(uint32_t *state, const uint8_t *input) 68 { 69 uint32_t a, b, c, d, e, f, g, h, t1, t2; 70 uint32_t W[64]; 71 int i; 72 73 /* load the input */ 74 for (i = 0; i < 16; i++) 75 LOAD_OP(i, W, input); 76 77 /* now blend */ 78 for (i = 16; i < 64; i++) 79 BLEND_OP(i, W); 80 81 /* load the state into our registers */ 82 a=state[0]; b=state[1]; c=state[2]; d=state[3]; 83 e=state[4]; f=state[5]; g=state[6]; h=state[7]; 84 85 /* now iterate */ 86 t1 = h + e1(e) + Ch(e,f,g) + 0x428a2f98 + W[ 0]; 87 t2 = e0(a) + Maj(a,b,c); d+=t1; h=t1+t2; 88 t1 = g + e1(d) + Ch(d,e,f) + 0x71374491 + W[ 1]; 89 t2 = e0(h) + Maj(h,a,b); c+=t1; g=t1+t2; 90 t1 = f + e1(c) + Ch(c,d,e) + 0xb5c0fbcf + W[ 2]; 91 t2 = e0(g) + Maj(g,h,a); b+=t1; f=t1+t2; 92 t1 = e + e1(b) + Ch(b,c,d) + 0xe9b5dba5 + W[ 3]; 93 t2 = e0(f) + Maj(f,g,h); a+=t1; e=t1+t2; 94 t1 = d + e1(a) + Ch(a,b,c) + 0x3956c25b + W[ 4]; 95 t2 = e0(e) + Maj(e,f,g); h+=t1; d=t1+t2; 96 t1 = c + e1(h) + Ch(h,a,b) + 0x59f111f1 + W[ 5]; 97 t2 = e0(d) + Maj(d,e,f); g+=t1; c=t1+t2; 98 t1 = b + e1(g) + Ch(g,h,a) + 0x923f82a4 + W[ 6]; 99 t2 = e0(c) + Maj(c,d,e); f+=t1; b=t1+t2; 100 t1 = a + e1(f) + Ch(f,g,h) + 0xab1c5ed5 + W[ 7]; 101 t2 = e0(b) + Maj(b,c,d); e+=t1; a=t1+t2; 102 103 t1 = h + e1(e) + Ch(e,f,g) + 0xd807aa98 + W[ 8]; 104 t2 = e0(a) + Maj(a,b,c); d+=t1; h=t1+t2; 105 t1 = g + e1(d) + Ch(d,e,f) + 0x12835b01 + W[ 9]; 106 t2 = e0(h) + Maj(h,a,b); c+=t1; g=t1+t2; 107 t1 = f + e1(c) + Ch(c,d,e) + 0x243185be + W[10]; 108 t2 = e0(g) + Maj(g,h,a); b+=t1; f=t1+t2; 109 t1 = e + e1(b) + Ch(b,c,d) + 0x550c7dc3 + W[11]; 110 t2 = e0(f) + Maj(f,g,h); a+=t1; e=t1+t2; 111 t1 = d + e1(a) + Ch(a,b,c) + 0x72be5d74 + W[12]; 112 t2 = e0(e) + Maj(e,f,g); h+=t1; d=t1+t2; 113 t1 = c + e1(h) + Ch(h,a,b) + 0x80deb1fe + W[13]; 114 t2 = e0(d) + Maj(d,e,f); g+=t1; c=t1+t2; 115 t1 = b + e1(g) + Ch(g,h,a) + 0x9bdc06a7 + W[14]; 116 t2 = e0(c) + Maj(c,d,e); f+=t1; b=t1+t2; 117 t1 = a + e1(f) + Ch(f,g,h) + 0xc19bf174 + W[15]; 118 t2 = e0(b) + Maj(b,c,d); e+=t1; a=t1+t2; 119 120 t1 = h + e1(e) + Ch(e,f,g) + 0xe49b69c1 + W[16]; 121 t2 = e0(a) + Maj(a,b,c); d+=t1; h=t1+t2; 122 t1 = g + e1(d) + Ch(d,e,f) + 0xefbe4786 + W[17]; 123 t2 = e0(h) + Maj(h,a,b); c+=t1; g=t1+t2; 124 t1 = f + e1(c) + Ch(c,d,e) + 0x0fc19dc6 + W[18]; 125 t2 = e0(g) + Maj(g,h,a); b+=t1; f=t1+t2; 126 t1 = e + e1(b) + Ch(b,c,d) + 0x240ca1cc + W[19]; 127 t2 = e0(f) + Maj(f,g,h); a+=t1; e=t1+t2; 128 t1 = d + e1(a) + Ch(a,b,c) + 0x2de92c6f + W[20]; 129 t2 = e0(e) + Maj(e,f,g); h+=t1; d=t1+t2; 130 t1 = c + e1(h) + Ch(h,a,b) + 0x4a7484aa + W[21]; 131 t2 = e0(d) + Maj(d,e,f); g+=t1; c=t1+t2; 132 t1 = b + e1(g) + Ch(g,h,a) + 0x5cb0a9dc + W[22]; 133 t2 = e0(c) + Maj(c,d,e); f+=t1; b=t1+t2; 134 t1 = a + e1(f) + Ch(f,g,h) + 0x76f988da + W[23]; 135 t2 = e0(b) + Maj(b,c,d); e+=t1; a=t1+t2; 136 137 t1 = h + e1(e) + Ch(e,f,g) + 0x983e5152 + W[24]; 138 t2 = e0(a) + Maj(a,b,c); d+=t1; h=t1+t2; 139 t1 = g + e1(d) + Ch(d,e,f) + 0xa831c66d + W[25]; 140 t2 = e0(h) + Maj(h,a,b); c+=t1; g=t1+t2; 141 t1 = f + e1(c) + Ch(c,d,e) + 0xb00327c8 + W[26]; 142 t2 = e0(g) + Maj(g,h,a); b+=t1; f=t1+t2; 143 t1 = e + e1(b) + Ch(b,c,d) + 0xbf597fc7 + W[27]; 144 t2 = e0(f) + Maj(f,g,h); a+=t1; e=t1+t2; 145 t1 = d + e1(a) + Ch(a,b,c) + 0xc6e00bf3 + W[28]; 146 t2 = e0(e) + Maj(e,f,g); h+=t1; d=t1+t2; 147 t1 = c + e1(h) + Ch(h,a,b) + 0xd5a79147 + W[29]; 148 t2 = e0(d) + Maj(d,e,f); g+=t1; c=t1+t2; 149 t1 = b + e1(g) + Ch(g,h,a) + 0x06ca6351 + W[30]; 150 t2 = e0(c) + Maj(c,d,e); f+=t1; b=t1+t2; 151 t1 = a + e1(f) + Ch(f,g,h) + 0x14292967 + W[31]; 152 t2 = e0(b) + Maj(b,c,d); e+=t1; a=t1+t2; 153 154 t1 = h + e1(e) + Ch(e,f,g) + 0x27b70a85 + W[32]; 155 t2 = e0(a) + Maj(a,b,c); d+=t1; h=t1+t2; 156 t1 = g + e1(d) + Ch(d,e,f) + 0x2e1b2138 + W[33]; 157 t2 = e0(h) + Maj(h,a,b); c+=t1; g=t1+t2; 158 t1 = f + e1(c) + Ch(c,d,e) + 0x4d2c6dfc + W[34]; 159 t2 = e0(g) + Maj(g,h,a); b+=t1; f=t1+t2; 160 t1 = e + e1(b) + Ch(b,c,d) + 0x53380d13 + W[35]; 161 t2 = e0(f) + Maj(f,g,h); a+=t1; e=t1+t2; 162 t1 = d + e1(a) + Ch(a,b,c) + 0x650a7354 + W[36]; 163 t2 = e0(e) + Maj(e,f,g); h+=t1; d=t1+t2; 164 t1 = c + e1(h) + Ch(h,a,b) + 0x766a0abb + W[37]; 165 t2 = e0(d) + Maj(d,e,f); g+=t1; c=t1+t2; 166 t1 = b + e1(g) + Ch(g,h,a) + 0x81c2c92e + W[38]; 167 t2 = e0(c) + Maj(c,d,e); f+=t1; b=t1+t2; 168 t1 = a + e1(f) + Ch(f,g,h) + 0x92722c85 + W[39]; 169 t2 = e0(b) + Maj(b,c,d); e+=t1; a=t1+t2; 170 171 t1 = h + e1(e) + Ch(e,f,g) + 0xa2bfe8a1 + W[40]; 172 t2 = e0(a) + Maj(a,b,c); d+=t1; h=t1+t2; 173 t1 = g + e1(d) + Ch(d,e,f) + 0xa81a664b + W[41]; 174 t2 = e0(h) + Maj(h,a,b); c+=t1; g=t1+t2; 175 t1 = f + e1(c) + Ch(c,d,e) + 0xc24b8b70 + W[42]; 176 t2 = e0(g) + Maj(g,h,a); b+=t1; f=t1+t2; 177 t1 = e + e1(b) + Ch(b,c,d) + 0xc76c51a3 + W[43]; 178 t2 = e0(f) + Maj(f,g,h); a+=t1; e=t1+t2; 179 t1 = d + e1(a) + Ch(a,b,c) + 0xd192e819 + W[44]; 180 t2 = e0(e) + Maj(e,f,g); h+=t1; d=t1+t2; 181 t1 = c + e1(h) + Ch(h,a,b) + 0xd6990624 + W[45]; 182 t2 = e0(d) + Maj(d,e,f); g+=t1; c=t1+t2; 183 t1 = b + e1(g) + Ch(g,h,a) + 0xf40e3585 + W[46]; 184 t2 = e0(c) + Maj(c,d,e); f+=t1; b=t1+t2; 185 t1 = a + e1(f) + Ch(f,g,h) + 0x106aa070 + W[47]; 186 t2 = e0(b) + Maj(b,c,d); e+=t1; a=t1+t2; 187 188 t1 = h + e1(e) + Ch(e,f,g) + 0x19a4c116 + W[48]; 189 t2 = e0(a) + Maj(a,b,c); d+=t1; h=t1+t2; 190 t1 = g + e1(d) + Ch(d,e,f) + 0x1e376c08 + W[49]; 191 t2 = e0(h) + Maj(h,a,b); c+=t1; g=t1+t2; 192 t1 = f + e1(c) + Ch(c,d,e) + 0x2748774c + W[50]; 193 t2 = e0(g) + Maj(g,h,a); b+=t1; f=t1+t2; 194 t1 = e + e1(b) + Ch(b,c,d) + 0x34b0bcb5 + W[51]; 195 t2 = e0(f) + Maj(f,g,h); a+=t1; e=t1+t2; 196 t1 = d + e1(a) + Ch(a,b,c) + 0x391c0cb3 + W[52]; 197 t2 = e0(e) + Maj(e,f,g); h+=t1; d=t1+t2; 198 t1 = c + e1(h) + Ch(h,a,b) + 0x4ed8aa4a + W[53]; 199 t2 = e0(d) + Maj(d,e,f); g+=t1; c=t1+t2; 200 t1 = b + e1(g) + Ch(g,h,a) + 0x5b9cca4f + W[54]; 201 t2 = e0(c) + Maj(c,d,e); f+=t1; b=t1+t2; 202 t1 = a + e1(f) + Ch(f,g,h) + 0x682e6ff3 + W[55]; 203 t2 = e0(b) + Maj(b,c,d); e+=t1; a=t1+t2; 204 205 t1 = h + e1(e) + Ch(e,f,g) + 0x748f82ee + W[56]; 206 t2 = e0(a) + Maj(a,b,c); d+=t1; h=t1+t2; 207 t1 = g + e1(d) + Ch(d,e,f) + 0x78a5636f + W[57]; 208 t2 = e0(h) + Maj(h,a,b); c+=t1; g=t1+t2; 209 t1 = f + e1(c) + Ch(c,d,e) + 0x84c87814 + W[58]; 210 t2 = e0(g) + Maj(g,h,a); b+=t1; f=t1+t2; 211 t1 = e + e1(b) + Ch(b,c,d) + 0x8cc70208 + W[59]; 212 t2 = e0(f) + Maj(f,g,h); a+=t1; e=t1+t2; 213 t1 = d + e1(a) + Ch(a,b,c) + 0x90befffa + W[60]; 214 t2 = e0(e) + Maj(e,f,g); h+=t1; d=t1+t2; 215 t1 = c + e1(h) + Ch(h,a,b) + 0xa4506ceb + W[61]; 216 t2 = e0(d) + Maj(d,e,f); g+=t1; c=t1+t2; 217 t1 = b + e1(g) + Ch(g,h,a) + 0xbef9a3f7 + W[62]; 218 t2 = e0(c) + Maj(c,d,e); f+=t1; b=t1+t2; 219 t1 = a + e1(f) + Ch(f,g,h) + 0xc67178f2 + W[63]; 220 t2 = e0(b) + Maj(b,c,d); e+=t1; a=t1+t2; 221 222 state[0] += a; state[1] += b; state[2] += c; state[3] += d; 223 state[4] += e; state[5] += f; state[6] += g; state[7] += h; 224 225 /* clear any sensitive info... */ 226 a = b = c = d = e = f = g = h = t1 = t2 = 0; 227 memset(W, 0, 64 * sizeof(uint32_t)); 228 } 229 230 void fio_sha256_init(struct fio_sha256_ctx *sctx) 231 { 232 sctx->state[0] = H0; 233 sctx->state[1] = H1; 234 sctx->state[2] = H2; 235 sctx->state[3] = H3; 236 sctx->state[4] = H4; 237 sctx->state[5] = H5; 238 sctx->state[6] = H6; 239 sctx->state[7] = H7; 240 sctx->count = 0; 241 } 242 243 void fio_sha256_update(struct fio_sha256_ctx *sctx, const uint8_t *data, 244 unsigned int len) 245 { 246 unsigned int partial, done; 247 const uint8_t *src; 248 249 partial = sctx->count & 0x3f; 250 sctx->count += len; 251 done = 0; 252 src = data; 253 254 if ((partial + len) > 63) { 255 if (partial) { 256 done = -partial; 257 memcpy(sctx->buf + partial, data, done + 64); 258 src = sctx->buf; 259 } 260 261 do { 262 sha256_transform(sctx->state, src); 263 done += 64; 264 src = data + done; 265 } while (done + 63 < len); 266 267 partial = 0; 268 } 269 memcpy(sctx->buf + partial, src, len - done); 270 } 271 272 void fio_sha256_final(struct fio_sha256_ctx *sctx) 273 { 274 uint64_t bits; 275 unsigned int index, pad_len; 276 int i; 277 static const uint8_t padding[64] = { 0x80, }; 278 279 /* Save number of bits */ 280 bits = (uint64_t) sctx->count << 3; 281 282 /* Pad out to 56 mod 64. */ 283 index = sctx->count & 0x3f; 284 pad_len = (index < 56) ? (56 - index) : ((64+56) - index); 285 fio_sha256_update(sctx, padding, pad_len); 286 287 /* Append length (before padding) */ 288 fio_sha256_update(sctx, (const uint8_t *)&bits, sizeof(bits)); 289 290 /* Store state in digest */ 291 for (i = 0; i < 8; i++) 292 sctx->buf[i] = sctx->state[i]; 293 } 294
