1 // SPDX-License-Identifier: BSD-3-Clause 2 /* 3 * Copyright (C) 2005, 2007 Olivier Gay <olivier.gay@a3.epfl.ch> 4 * All rights reserved. 5 * 6 * FIPS 180-2 SHA-224/256/384/512 implementation 7 * Last update: 02/02/2007 8 * Issue date: 04/30/2005 9 */ 10 11 #include "avb_sha.h" 12 13 #define SHFR(x, n) (x >> n) 14 #define ROTR(x, n) ((x >> n) | (x << ((sizeof(x) << 3) - n))) 15 #define ROTL(x, n) ((x << n) | (x >> ((sizeof(x) << 3) - n))) 16 #define CH(x, y, z) ((x & y) ^ (~x & z)) 17 #define MAJ(x, y, z) ((x & y) ^ (x & z) ^ (y & z)) 18 19 #define SHA512_F1(x) (ROTR(x, 28) ^ ROTR(x, 34) ^ ROTR(x, 39)) 20 #define SHA512_F2(x) (ROTR(x, 14) ^ ROTR(x, 18) ^ ROTR(x, 41)) 21 #define SHA512_F3(x) (ROTR(x, 1) ^ ROTR(x, 8) ^ SHFR(x, 7)) 22 #define SHA512_F4(x) (ROTR(x, 19) ^ ROTR(x, 61) ^ SHFR(x, 6)) 23 24 #define UNPACK32(x, str) \ 25 { \ 26 *((str) + 3) = (uint8_t)((x)); \ 27 *((str) + 2) = (uint8_t)((x) >> 8); \ 28 *((str) + 1) = (uint8_t)((x) >> 16); \ 29 *((str) + 0) = (uint8_t)((x) >> 24); \ 30 } 31 32 #define UNPACK64(x, str) \ 33 { \ 34 *((str) + 7) = (uint8_t)x; \ 35 *((str) + 6) = (uint8_t)((uint64_t)x >> 8); \ 36 *((str) + 5) = (uint8_t)((uint64_t)x >> 16); \ 37 *((str) + 4) = (uint8_t)((uint64_t)x >> 24); \ 38 *((str) + 3) = (uint8_t)((uint64_t)x >> 32); \ 39 *((str) + 2) = (uint8_t)((uint64_t)x >> 40); \ 40 *((str) + 1) = (uint8_t)((uint64_t)x >> 48); \ 41 *((str) + 0) = (uint8_t)((uint64_t)x >> 56); \ 42 } 43 44 #define PACK64(str, x) \ 45 { \ 46 *(x) = \ 47 ((uint64_t) * ((str) + 7)) | ((uint64_t) * ((str) + 6) << 8) | \ 48 ((uint64_t) * ((str) + 5) << 16) | ((uint64_t) * ((str) + 4) << 24) | \ 49 ((uint64_t) * ((str) + 3) << 32) | ((uint64_t) * ((str) + 2) << 40) | \ 50 ((uint64_t) * ((str) + 1) << 48) | ((uint64_t) * ((str) + 0) << 56); \ 51 } 52 53 /* Macros used for loops unrolling */ 54 55 #define SHA512_SCR(i) \ 56 { w[i] = SHA512_F4(w[i - 2]) + w[i - 7] + SHA512_F3(w[i - 15]) + w[i - 16]; } 57 58 #define SHA512_EXP(a, b, c, d, e, f, g, h, j) \ 59 { \ 60 t1 = wv[h] + SHA512_F2(wv[e]) + CH(wv[e], wv[f], wv[g]) + sha512_k[j] + \ 61 w[j]; \ 62 t2 = SHA512_F1(wv[a]) + MAJ(wv[a], wv[b], wv[c]); \ 63 wv[d] += t1; \ 64 wv[h] = t1 + t2; \ 65 } 66 67 static const uint64_t sha512_h0[8] = {0x6a09e667f3bcc908ULL, 68 0xbb67ae8584caa73bULL, 69 0x3c6ef372fe94f82bULL, 70 0xa54ff53a5f1d36f1ULL, 71 0x510e527fade682d1ULL, 72 0x9b05688c2b3e6c1fULL, 73 0x1f83d9abfb41bd6bULL, 74 0x5be0cd19137e2179ULL}; 75 76 static const uint64_t sha512_k[80] = { 77 0x428a2f98d728ae22ULL, 0x7137449123ef65cdULL, 0xb5c0fbcfec4d3b2fULL, 78 0xe9b5dba58189dbbcULL, 0x3956c25bf348b538ULL, 0x59f111f1b605d019ULL, 79 0x923f82a4af194f9bULL, 0xab1c5ed5da6d8118ULL, 0xd807aa98a3030242ULL, 80 0x12835b0145706fbeULL, 0x243185be4ee4b28cULL, 0x550c7dc3d5ffb4e2ULL, 81 0x72be5d74f27b896fULL, 0x80deb1fe3b1696b1ULL, 0x9bdc06a725c71235ULL, 82 0xc19bf174cf692694ULL, 0xe49b69c19ef14ad2ULL, 0xefbe4786384f25e3ULL, 83 0x0fc19dc68b8cd5b5ULL, 0x240ca1cc77ac9c65ULL, 0x2de92c6f592b0275ULL, 84 0x4a7484aa6ea6e483ULL, 0x5cb0a9dcbd41fbd4ULL, 0x76f988da831153b5ULL, 85 0x983e5152ee66dfabULL, 0xa831c66d2db43210ULL, 0xb00327c898fb213fULL, 86 0xbf597fc7beef0ee4ULL, 0xc6e00bf33da88fc2ULL, 0xd5a79147930aa725ULL, 87 0x06ca6351e003826fULL, 0x142929670a0e6e70ULL, 0x27b70a8546d22ffcULL, 88 0x2e1b21385c26c926ULL, 0x4d2c6dfc5ac42aedULL, 0x53380d139d95b3dfULL, 89 0x650a73548baf63deULL, 0x766a0abb3c77b2a8ULL, 0x81c2c92e47edaee6ULL, 90 0x92722c851482353bULL, 0xa2bfe8a14cf10364ULL, 0xa81a664bbc423001ULL, 91 0xc24b8b70d0f89791ULL, 0xc76c51a30654be30ULL, 0xd192e819d6ef5218ULL, 92 0xd69906245565a910ULL, 0xf40e35855771202aULL, 0x106aa07032bbd1b8ULL, 93 0x19a4c116b8d2d0c8ULL, 0x1e376c085141ab53ULL, 0x2748774cdf8eeb99ULL, 94 0x34b0bcb5e19b48a8ULL, 0x391c0cb3c5c95a63ULL, 0x4ed8aa4ae3418acbULL, 95 0x5b9cca4f7763e373ULL, 0x682e6ff3d6b2b8a3ULL, 0x748f82ee5defb2fcULL, 96 0x78a5636f43172f60ULL, 0x84c87814a1f0ab72ULL, 0x8cc702081a6439ecULL, 97 0x90befffa23631e28ULL, 0xa4506cebde82bde9ULL, 0xbef9a3f7b2c67915ULL, 98 0xc67178f2e372532bULL, 0xca273eceea26619cULL, 0xd186b8c721c0c207ULL, 99 0xeada7dd6cde0eb1eULL, 0xf57d4f7fee6ed178ULL, 0x06f067aa72176fbaULL, 100 0x0a637dc5a2c898a6ULL, 0x113f9804bef90daeULL, 0x1b710b35131c471bULL, 101 0x28db77f523047d84ULL, 0x32caab7b40c72493ULL, 0x3c9ebe0a15c9bebcULL, 102 0x431d67c49c100d4cULL, 0x4cc5d4becb3e42b6ULL, 0x597f299cfc657e2aULL, 103 0x5fcb6fab3ad6faecULL, 0x6c44198c4a475817ULL}; 104 105 /* SHA-512 implementation */ 106 107 void avb_sha512_init(AvbSHA512Ctx* ctx) { 108 #ifdef UNROLL_LOOPS_SHA512 109 ctx->h[0] = sha512_h0[0]; 110 ctx->h[1] = sha512_h0[1]; 111 ctx->h[2] = sha512_h0[2]; 112 ctx->h[3] = sha512_h0[3]; 113 ctx->h[4] = sha512_h0[4]; 114 ctx->h[5] = sha512_h0[5]; 115 ctx->h[6] = sha512_h0[6]; 116 ctx->h[7] = sha512_h0[7]; 117 #else 118 int i; 119 120 for (i = 0; i < 8; i++) 121 ctx->h[i] = sha512_h0[i]; 122 #endif /* UNROLL_LOOPS_SHA512 */ 123 124 ctx->len = 0; 125 ctx->tot_len = 0; 126 } 127 128 static void SHA512_transform(AvbSHA512Ctx* ctx, 129 const uint8_t* message, 130 unsigned int block_nb) { 131 uint64_t w[80]; 132 uint64_t wv[8]; 133 uint64_t t1, t2; 134 const uint8_t* sub_block; 135 int i, j; 136 137 for (i = 0; i < (int)block_nb; i++) { 138 sub_block = message + (i << 7); 139 140 #ifdef UNROLL_LOOPS_SHA512 141 PACK64(&sub_block[0], &w[0]); 142 PACK64(&sub_block[8], &w[1]); 143 PACK64(&sub_block[16], &w[2]); 144 PACK64(&sub_block[24], &w[3]); 145 PACK64(&sub_block[32], &w[4]); 146 PACK64(&sub_block[40], &w[5]); 147 PACK64(&sub_block[48], &w[6]); 148 PACK64(&sub_block[56], &w[7]); 149 PACK64(&sub_block[64], &w[8]); 150 PACK64(&sub_block[72], &w[9]); 151 PACK64(&sub_block[80], &w[10]); 152 PACK64(&sub_block[88], &w[11]); 153 PACK64(&sub_block[96], &w[12]); 154 PACK64(&sub_block[104], &w[13]); 155 PACK64(&sub_block[112], &w[14]); 156 PACK64(&sub_block[120], &w[15]); 157 158 SHA512_SCR(16); 159 SHA512_SCR(17); 160 SHA512_SCR(18); 161 SHA512_SCR(19); 162 SHA512_SCR(20); 163 SHA512_SCR(21); 164 SHA512_SCR(22); 165 SHA512_SCR(23); 166 SHA512_SCR(24); 167 SHA512_SCR(25); 168 SHA512_SCR(26); 169 SHA512_SCR(27); 170 SHA512_SCR(28); 171 SHA512_SCR(29); 172 SHA512_SCR(30); 173 SHA512_SCR(31); 174 SHA512_SCR(32); 175 SHA512_SCR(33); 176 SHA512_SCR(34); 177 SHA512_SCR(35); 178 SHA512_SCR(36); 179 SHA512_SCR(37); 180 SHA512_SCR(38); 181 SHA512_SCR(39); 182 SHA512_SCR(40); 183 SHA512_SCR(41); 184 SHA512_SCR(42); 185 SHA512_SCR(43); 186 SHA512_SCR(44); 187 SHA512_SCR(45); 188 SHA512_SCR(46); 189 SHA512_SCR(47); 190 SHA512_SCR(48); 191 SHA512_SCR(49); 192 SHA512_SCR(50); 193 SHA512_SCR(51); 194 SHA512_SCR(52); 195 SHA512_SCR(53); 196 SHA512_SCR(54); 197 SHA512_SCR(55); 198 SHA512_SCR(56); 199 SHA512_SCR(57); 200 SHA512_SCR(58); 201 SHA512_SCR(59); 202 SHA512_SCR(60); 203 SHA512_SCR(61); 204 SHA512_SCR(62); 205 SHA512_SCR(63); 206 SHA512_SCR(64); 207 SHA512_SCR(65); 208 SHA512_SCR(66); 209 SHA512_SCR(67); 210 SHA512_SCR(68); 211 SHA512_SCR(69); 212 SHA512_SCR(70); 213 SHA512_SCR(71); 214 SHA512_SCR(72); 215 SHA512_SCR(73); 216 SHA512_SCR(74); 217 SHA512_SCR(75); 218 SHA512_SCR(76); 219 SHA512_SCR(77); 220 SHA512_SCR(78); 221 SHA512_SCR(79); 222 223 wv[0] = ctx->h[0]; 224 wv[1] = ctx->h[1]; 225 wv[2] = ctx->h[2]; 226 wv[3] = ctx->h[3]; 227 wv[4] = ctx->h[4]; 228 wv[5] = ctx->h[5]; 229 wv[6] = ctx->h[6]; 230 wv[7] = ctx->h[7]; 231 232 j = 0; 233 234 do { 235 SHA512_EXP(0, 1, 2, 3, 4, 5, 6, 7, j); 236 j++; 237 SHA512_EXP(7, 0, 1, 2, 3, 4, 5, 6, j); 238 j++; 239 SHA512_EXP(6, 7, 0, 1, 2, 3, 4, 5, j); 240 j++; 241 SHA512_EXP(5, 6, 7, 0, 1, 2, 3, 4, j); 242 j++; 243 SHA512_EXP(4, 5, 6, 7, 0, 1, 2, 3, j); 244 j++; 245 SHA512_EXP(3, 4, 5, 6, 7, 0, 1, 2, j); 246 j++; 247 SHA512_EXP(2, 3, 4, 5, 6, 7, 0, 1, j); 248 j++; 249 SHA512_EXP(1, 2, 3, 4, 5, 6, 7, 0, j); 250 j++; 251 } while (j < 80); 252 253 ctx->h[0] += wv[0]; 254 ctx->h[1] += wv[1]; 255 ctx->h[2] += wv[2]; 256 ctx->h[3] += wv[3]; 257 ctx->h[4] += wv[4]; 258 ctx->h[5] += wv[5]; 259 ctx->h[6] += wv[6]; 260 ctx->h[7] += wv[7]; 261 #else 262 for (j = 0; j < 16; j++) { 263 PACK64(&sub_block[j << 3], &w[j]); 264 } 265 266 for (j = 16; j < 80; j++) { 267 SHA512_SCR(j); 268 } 269 270 for (j = 0; j < 8; j++) { 271 wv[j] = ctx->h[j]; 272 } 273 274 for (j = 0; j < 80; j++) { 275 t1 = wv[7] + SHA512_F2(wv[4]) + CH(wv[4], wv[5], wv[6]) + sha512_k[j] + 276 w[j]; 277 t2 = SHA512_F1(wv[0]) + MAJ(wv[0], wv[1], wv[2]); 278 wv[7] = wv[6]; 279 wv[6] = wv[5]; 280 wv[5] = wv[4]; 281 wv[4] = wv[3] + t1; 282 wv[3] = wv[2]; 283 wv[2] = wv[1]; 284 wv[1] = wv[0]; 285 wv[0] = t1 + t2; 286 } 287 288 for (j = 0; j < 8; j++) 289 ctx->h[j] += wv[j]; 290 #endif /* UNROLL_LOOPS_SHA512 */ 291 } 292 } 293 294 void avb_sha512_update(AvbSHA512Ctx* ctx, const uint8_t* data, uint32_t len) { 295 unsigned int block_nb; 296 unsigned int new_len, rem_len, tmp_len; 297 const uint8_t* shifted_data; 298 299 tmp_len = AVB_SHA512_BLOCK_SIZE - ctx->len; 300 rem_len = len < tmp_len ? len : tmp_len; 301 302 avb_memcpy(&ctx->block[ctx->len], data, rem_len); 303 304 if (ctx->len + len < AVB_SHA512_BLOCK_SIZE) { 305 ctx->len += len; 306 return; 307 } 308 309 new_len = len - rem_len; 310 block_nb = new_len / AVB_SHA512_BLOCK_SIZE; 311 312 shifted_data = data + rem_len; 313 314 SHA512_transform(ctx, ctx->block, 1); 315 SHA512_transform(ctx, shifted_data, block_nb); 316 317 rem_len = new_len % AVB_SHA512_BLOCK_SIZE; 318 319 avb_memcpy(ctx->block, &shifted_data[block_nb << 7], rem_len); 320 321 ctx->len = rem_len; 322 ctx->tot_len += (block_nb + 1) << 7; 323 } 324 325 uint8_t* avb_sha512_final(AvbSHA512Ctx* ctx) { 326 unsigned int block_nb; 327 unsigned int pm_len; 328 unsigned int len_b; 329 330 #ifndef UNROLL_LOOPS_SHA512 331 int i; 332 #endif 333 334 block_nb = 335 1 + ((AVB_SHA512_BLOCK_SIZE - 17) < (ctx->len % AVB_SHA512_BLOCK_SIZE)); 336 337 len_b = (ctx->tot_len + ctx->len) << 3; 338 pm_len = block_nb << 7; 339 340 avb_memset(ctx->block + ctx->len, 0, pm_len - ctx->len); 341 ctx->block[ctx->len] = 0x80; 342 UNPACK32(len_b, ctx->block + pm_len - 4); 343 344 SHA512_transform(ctx, ctx->block, block_nb); 345 346 #ifdef UNROLL_LOOPS_SHA512 347 UNPACK64(ctx->h[0], &ctx->buf[0]); 348 UNPACK64(ctx->h[1], &ctx->buf[8]); 349 UNPACK64(ctx->h[2], &ctx->buf[16]); 350 UNPACK64(ctx->h[3], &ctx->buf[24]); 351 UNPACK64(ctx->h[4], &ctx->buf[32]); 352 UNPACK64(ctx->h[5], &ctx->buf[40]); 353 UNPACK64(ctx->h[6], &ctx->buf[48]); 354 UNPACK64(ctx->h[7], &ctx->buf[56]); 355 #else 356 for (i = 0; i < 8; i++) 357 UNPACK64(ctx->h[i], &ctx->buf[i << 3]); 358 #endif /* UNROLL_LOOPS_SHA512 */ 359 360 return ctx->buf; 361 } 362