sha2big.c
1 /* 2 * Copyright (c) 2016 Thomas Pornin <pornin@bolet.org> 3 * 4 * Permission is hereby granted, free of charge, to any person obtaining 5 * a copy of this software and associated documentation files (the 6 * "Software"), to deal in the Software without restriction, including 7 * without limitation the rights to use, copy, modify, merge, publish, 8 * distribute, sublicense, and/or sell copies of the Software, and to 9 * permit persons to whom the Software is furnished to do so, subject to 10 * the following conditions: 11 * 12 * The above copyright notice and this permission notice shall be 13 * included in all copies or substantial portions of the Software. 14 * 15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 16 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 17 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 18 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS 19 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN 20 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 21 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 22 * SOFTWARE. 23 */ 24 25 #include "inner.h" 26 27 #define CH(X, Y, Z) ((((Y) ^ (Z)) & (X)) ^ (Z)) 28 #define MAJ(X, Y, Z) (((Y) & (Z)) | (((Y) | (Z)) & (X))) 29 30 #define ROTR(x, n) (((uint64_t)(x) << (64 - (n))) | ((uint64_t)(x) >> (n))) 31 32 #define BSG5_0(x) (ROTR(x, 28) ^ ROTR(x, 34) ^ ROTR(x, 39)) 33 #define BSG5_1(x) (ROTR(x, 14) ^ ROTR(x, 18) ^ ROTR(x, 41)) 34 #define SSG5_0(x) (ROTR(x, 1) ^ ROTR(x, 8) ^ (uint64_t)((x) >> 7)) 35 #define SSG5_1(x) (ROTR(x, 19) ^ ROTR(x, 61) ^ (uint64_t)((x) >> 6)) 36 37 static const uint64_t IV384[8] = { 38 0xCBBB9D5DC1059ED8, 0x629A292A367CD507, 39 0x9159015A3070DD17, 0x152FECD8F70E5939, 40 0x67332667FFC00B31, 0x8EB44A8768581511, 41 0xDB0C2E0D64F98FA7, 0x47B5481DBEFA4FA4 42 }; 43 44 static const uint64_t IV512[8] = { 45 0x6A09E667F3BCC908, 0xBB67AE8584CAA73B, 46 0x3C6EF372FE94F82B, 0xA54FF53A5F1D36F1, 47 0x510E527FADE682D1, 0x9B05688C2B3E6C1F, 48 0x1F83D9ABFB41BD6B, 0x5BE0CD19137E2179 49 }; 50 51 static const uint64_t K[80] = { 52 0x428A2F98D728AE22, 0x7137449123EF65CD, 53 0xB5C0FBCFEC4D3B2F, 0xE9B5DBA58189DBBC, 54 0x3956C25BF348B538, 0x59F111F1B605D019, 55 0x923F82A4AF194F9B, 0xAB1C5ED5DA6D8118, 56 0xD807AA98A3030242, 0x12835B0145706FBE, 57 0x243185BE4EE4B28C, 0x550C7DC3D5FFB4E2, 58 0x72BE5D74F27B896F, 0x80DEB1FE3B1696B1, 59 0x9BDC06A725C71235, 0xC19BF174CF692694, 60 0xE49B69C19EF14AD2, 0xEFBE4786384F25E3, 61 0x0FC19DC68B8CD5B5, 0x240CA1CC77AC9C65, 62 0x2DE92C6F592B0275, 0x4A7484AA6EA6E483, 63 0x5CB0A9DCBD41FBD4, 0x76F988DA831153B5, 64 0x983E5152EE66DFAB, 0xA831C66D2DB43210, 65 0xB00327C898FB213F, 0xBF597FC7BEEF0EE4, 66 0xC6E00BF33DA88FC2, 0xD5A79147930AA725, 67 0x06CA6351E003826F, 0x142929670A0E6E70, 68 0x27B70A8546D22FFC, 0x2E1B21385C26C926, 69 0x4D2C6DFC5AC42AED, 0x53380D139D95B3DF, 70 0x650A73548BAF63DE, 0x766A0ABB3C77B2A8, 71 0x81C2C92E47EDAEE6, 0x92722C851482353B, 72 0xA2BFE8A14CF10364, 0xA81A664BBC423001, 73 0xC24B8B70D0F89791, 0xC76C51A30654BE30, 74 0xD192E819D6EF5218, 0xD69906245565A910, 75 0xF40E35855771202A, 0x106AA07032BBD1B8, 76 0x19A4C116B8D2D0C8, 0x1E376C085141AB53, 77 0x2748774CDF8EEB99, 0x34B0BCB5E19B48A8, 78 0x391C0CB3C5C95A63, 0x4ED8AA4AE3418ACB, 79 0x5B9CCA4F7763E373, 0x682E6FF3D6B2B8A3, 80 0x748F82EE5DEFB2FC, 0x78A5636F43172F60, 81 0x84C87814A1F0AB72, 0x8CC702081A6439EC, 82 0x90BEFFFA23631E28, 0xA4506CEBDE82BDE9, 83 0xBEF9A3F7B2C67915, 0xC67178F2E372532B, 84 0xCA273ECEEA26619C, 0xD186B8C721C0C207, 85 0xEADA7DD6CDE0EB1E, 0xF57D4F7FEE6ED178, 86 0x06F067AA72176FBA, 0x0A637DC5A2C898A6, 87 0x113F9804BEF90DAE, 0x1B710B35131C471B, 88 0x28DB77F523047D84, 0x32CAAB7B40C72493, 89 0x3C9EBE0A15C9BEBC, 0x431D67C49C100D4C, 90 0x4CC5D4BECB3E42B6, 0x597F299CFC657E2A, 91 0x5FCB6FAB3AD6FAEC, 0x6C44198C4A475817 92 }; 93 94 static void 95 sha2big_round(const unsigned char *buf, uint64_t *val) 96 { 97 98 #define SHA2BIG_STEP(A, B, C, D, E, F, G, H, j) do { \ 99 uint64_t T1, T2; \ 100 T1 = H + BSG5_1(E) + CH(E, F, G) + K[j] + w[j]; \ 101 T2 = BSG5_0(A) + MAJ(A, B, C); \ 102 D += T1; \ 103 H = T1 + T2; \ 104 } while (0) 105 106 int i; 107 uint64_t a, b, c, d, e, f, g, h; 108 uint64_t w[80]; 109 110 br_range_dec64be(w, 16, buf); 111 for (i = 16; i < 80; i ++) { 112 w[i] = SSG5_1(w[i - 2]) + w[i - 7] 113 + SSG5_0(w[i - 15]) + w[i - 16]; 114 } 115 a = val[0]; 116 b = val[1]; 117 c = val[2]; 118 d = val[3]; 119 e = val[4]; 120 f = val[5]; 121 g = val[6]; 122 h = val[7]; 123 for (i = 0; i < 80; i += 8) { 124 SHA2BIG_STEP(a, b, c, d, e, f, g, h, i + 0); 125 SHA2BIG_STEP(h, a, b, c, d, e, f, g, i + 1); 126 SHA2BIG_STEP(g, h, a, b, c, d, e, f, i + 2); 127 SHA2BIG_STEP(f, g, h, a, b, c, d, e, i + 3); 128 SHA2BIG_STEP(e, f, g, h, a, b, c, d, i + 4); 129 SHA2BIG_STEP(d, e, f, g, h, a, b, c, i + 5); 130 SHA2BIG_STEP(c, d, e, f, g, h, a, b, i + 6); 131 SHA2BIG_STEP(b, c, d, e, f, g, h, a, i + 7); 132 } 133 val[0] += a; 134 val[1] += b; 135 val[2] += c; 136 val[3] += d; 137 val[4] += e; 138 val[5] += f; 139 val[6] += g; 140 val[7] += h; 141 } 142 143 static void 144 sha2big_update(br_sha384_context *cc, const void *data, size_t len) 145 { 146 const unsigned char *buf; 147 size_t ptr; 148 149 buf = data; 150 ptr = (size_t)cc->count & 127; 151 cc->count += (uint64_t)len; 152 while (len > 0) { 153 size_t clen; 154 155 clen = 128 - ptr; 156 if (clen > len) { 157 clen = len; 158 } 159 memcpy(cc->buf + ptr, buf, clen); 160 ptr += clen; 161 buf += clen; 162 len -= clen; 163 if (ptr == 128) { 164 sha2big_round(cc->buf, cc->val); 165 ptr = 0; 166 } 167 } 168 } 169 170 static void 171 sha2big_out(const br_sha384_context *cc, void *dst, int num) 172 { 173 unsigned char buf[128]; 174 uint64_t val[8]; 175 size_t ptr; 176 177 ptr = (size_t)cc->count & 127; 178 memcpy(buf, cc->buf, ptr); 179 memcpy(val, cc->val, sizeof val); 180 buf[ptr ++] = 0x80; 181 if (ptr > 112) { 182 memset(buf + ptr, 0, 128 - ptr); 183 sha2big_round(buf, val); 184 memset(buf, 0, 112); 185 } else { 186 memset(buf + ptr, 0, 112 - ptr); 187 } 188 br_enc64be(buf + 112, cc->count >> 61); 189 br_enc64be(buf + 120, cc->count << 3); 190 sha2big_round(buf, val); 191 br_range_enc64be(dst, val, num); 192 } 193 194 /* see bearssl.h */ 195 void 196 br_sha384_init(br_sha384_context *cc) 197 { 198 cc->vtable = &br_sha384_vtable; 199 memcpy(cc->val, IV384, sizeof IV384); 200 cc->count = 0; 201 } 202 203 /* see bearssl.h */ 204 void 205 br_sha384_update(br_sha384_context *cc, const void *data, size_t len) 206 { 207 sha2big_update(cc, data, len); 208 } 209 210 /* see bearssl.h */ 211 void 212 br_sha384_out(const br_sha384_context *cc, void *dst) 213 { 214 sha2big_out(cc, dst, 6); 215 } 216 217 /* see bearssl.h */ 218 uint64_t 219 br_sha384_state(const br_sha384_context *cc, void *dst) 220 { 221 br_range_enc64be(dst, cc->val, 8); 222 return cc->count; 223 } 224 225 /* see bearssl.h */ 226 void 227 br_sha384_set_state(br_sha384_context *cc, const void *stb, uint64_t count) 228 { 229 br_range_dec64be(cc->val, 8, stb); 230 cc->count = count; 231 } 232 233 /* see bearssl.h */ 234 void 235 br_sha512_init(br_sha512_context *cc) 236 { 237 cc->vtable = &br_sha512_vtable; 238 memcpy(cc->val, IV512, sizeof IV512); 239 cc->count = 0; 240 } 241 242 /* see bearssl.h */ 243 void 244 br_sha512_out(const br_sha512_context *cc, void *dst) 245 { 246 sha2big_out(cc, dst, 8); 247 } 248 249 /* see bearssl.h */ 250 const br_hash_class br_sha384_vtable = { 251 sizeof(br_sha384_context), 252 BR_HASHDESC_ID(br_sha384_ID) 253 | BR_HASHDESC_OUT(48) 254 | BR_HASHDESC_STATE(64) 255 | BR_HASHDESC_LBLEN(7) 256 | BR_HASHDESC_MD_PADDING 257 | BR_HASHDESC_MD_PADDING_BE 258 | BR_HASHDESC_MD_PADDING_128, 259 (void (*)(const br_hash_class **))&br_sha384_init, 260 (void (*)(const br_hash_class **, const void *, size_t)) 261 &br_sha384_update, 262 (void (*)(const br_hash_class *const *, void *))&br_sha384_out, 263 (uint64_t (*)(const br_hash_class *const *, void *))&br_sha384_state, 264 (void (*)(const br_hash_class **, const void *, uint64_t)) 265 &br_sha384_set_state 266 }; 267 268 /* see bearssl.h */ 269 const br_hash_class br_sha512_vtable = { 270 sizeof(br_sha512_context), 271 BR_HASHDESC_ID(br_sha512_ID) 272 | BR_HASHDESC_OUT(64) 273 | BR_HASHDESC_STATE(64) 274 | BR_HASHDESC_LBLEN(7) 275 | BR_HASHDESC_MD_PADDING 276 | BR_HASHDESC_MD_PADDING_BE 277 | BR_HASHDESC_MD_PADDING_128, 278 (void (*)(const br_hash_class **))&br_sha512_init, 279 (void (*)(const br_hash_class **, const void *, size_t)) 280 &br_sha512_update, 281 (void (*)(const br_hash_class *const *, void *))&br_sha512_out, 282 (uint64_t (*)(const br_hash_class *const *, void *))&br_sha512_state, 283 (void (*)(const br_hash_class **, const void *, uint64_t)) 284 &br_sha512_set_state 285 };