| 1 | /* Crypto/Sha256.c -- SHA-256 Hash\r |
| 2 | 2015-11-14 : Igor Pavlov : Public domain\r |
| 3 | This code is based on public domain code from Wei Dai's Crypto++ library. */\r |
| 4 | \r |
| 5 | #include "Precomp.h"\r |
| 6 | \r |
| 7 | #include <string.h>\r |
| 8 | \r |
| 9 | #include "CpuArch.h"\r |
| 10 | #include "RotateDefs.h"\r |
| 11 | #include "Sha256.h"\r |
| 12 | \r |
| 13 | /* define it for speed optimization */\r |
| 14 | #ifndef _SFX\r |
| 15 | #define _SHA256_UNROLL\r |
| 16 | #define _SHA256_UNROLL2\r |
| 17 | #endif\r |
| 18 | \r |
| 19 | /* #define _SHA256_UNROLL2 */\r |
| 20 | \r |
| 21 | void Sha256_Init(CSha256 *p)\r |
| 22 | {\r |
| 23 | p->state[0] = 0x6a09e667;\r |
| 24 | p->state[1] = 0xbb67ae85;\r |
| 25 | p->state[2] = 0x3c6ef372;\r |
| 26 | p->state[3] = 0xa54ff53a;\r |
| 27 | p->state[4] = 0x510e527f;\r |
| 28 | p->state[5] = 0x9b05688c;\r |
| 29 | p->state[6] = 0x1f83d9ab;\r |
| 30 | p->state[7] = 0x5be0cd19;\r |
| 31 | p->count = 0;\r |
| 32 | }\r |
| 33 | \r |
| 34 | #define S0(x) (rotrFixed(x, 2) ^ rotrFixed(x,13) ^ rotrFixed(x, 22))\r |
| 35 | #define S1(x) (rotrFixed(x, 6) ^ rotrFixed(x,11) ^ rotrFixed(x, 25))\r |
| 36 | #define s0(x) (rotrFixed(x, 7) ^ rotrFixed(x,18) ^ (x >> 3))\r |
| 37 | #define s1(x) (rotrFixed(x,17) ^ rotrFixed(x,19) ^ (x >> 10))\r |
| 38 | \r |
| 39 | #define blk0(i) (W[i])\r |
| 40 | #define blk2(i) (W[i] += s1(W[((i)-2)&15]) + W[((i)-7)&15] + s0(W[((i)-15)&15]))\r |
| 41 | \r |
| 42 | #define Ch(x,y,z) (z^(x&(y^z)))\r |
| 43 | #define Maj(x,y,z) ((x&y)|(z&(x|y)))\r |
| 44 | \r |
| 45 | #ifdef _SHA256_UNROLL2\r |
| 46 | \r |
| 47 | #define R(a,b,c,d,e,f,g,h, i) \\r |
| 48 | h += S1(e) + Ch(e,f,g) + K[(i)+(j)] + (j ? blk2(i) : blk0(i)); \\r |
| 49 | d += h; \\r |
| 50 | h += S0(a) + Maj(a, b, c)\r |
| 51 | \r |
| 52 | #define RX_8(i) \\r |
| 53 | R(a,b,c,d,e,f,g,h, i); \\r |
| 54 | R(h,a,b,c,d,e,f,g, i+1); \\r |
| 55 | R(g,h,a,b,c,d,e,f, i+2); \\r |
| 56 | R(f,g,h,a,b,c,d,e, i+3); \\r |
| 57 | R(e,f,g,h,a,b,c,d, i+4); \\r |
| 58 | R(d,e,f,g,h,a,b,c, i+5); \\r |
| 59 | R(c,d,e,f,g,h,a,b, i+6); \\r |
| 60 | R(b,c,d,e,f,g,h,a, i+7)\r |
| 61 | \r |
| 62 | #define RX_16 RX_8(0); RX_8(8);\r |
| 63 | \r |
| 64 | #else\r |
| 65 | \r |
| 66 | #define a(i) T[(0-(i))&7]\r |
| 67 | #define b(i) T[(1-(i))&7]\r |
| 68 | #define c(i) T[(2-(i))&7]\r |
| 69 | #define d(i) T[(3-(i))&7]\r |
| 70 | #define e(i) T[(4-(i))&7]\r |
| 71 | #define f(i) T[(5-(i))&7]\r |
| 72 | #define g(i) T[(6-(i))&7]\r |
| 73 | #define h(i) T[(7-(i))&7]\r |
| 74 | \r |
| 75 | #define R(i) \\r |
| 76 | h(i) += S1(e(i)) + Ch(e(i),f(i),g(i)) + K[(i)+(j)] + (j ? blk2(i) : blk0(i)); \\r |
| 77 | d(i) += h(i); \\r |
| 78 | h(i) += S0(a(i)) + Maj(a(i), b(i), c(i)) \\r |
| 79 | \r |
| 80 | #ifdef _SHA256_UNROLL\r |
| 81 | \r |
| 82 | #define RX_8(i) R(i+0); R(i+1); R(i+2); R(i+3); R(i+4); R(i+5); R(i+6); R(i+7);\r |
| 83 | #define RX_16 RX_8(0); RX_8(8);\r |
| 84 | \r |
| 85 | #else\r |
| 86 | \r |
| 87 | #define RX_16 unsigned i; for (i = 0; i < 16; i++) { R(i); }\r |
| 88 | \r |
| 89 | #endif\r |
| 90 | \r |
| 91 | #endif\r |
| 92 | \r |
| 93 | static const UInt32 K[64] = {\r |
| 94 | 0x428a2f98, 0x71374491, 0xb5c0fbcf, 0xe9b5dba5,\r |
| 95 | 0x3956c25b, 0x59f111f1, 0x923f82a4, 0xab1c5ed5,\r |
| 96 | 0xd807aa98, 0x12835b01, 0x243185be, 0x550c7dc3,\r |
| 97 | 0x72be5d74, 0x80deb1fe, 0x9bdc06a7, 0xc19bf174,\r |
| 98 | 0xe49b69c1, 0xefbe4786, 0x0fc19dc6, 0x240ca1cc,\r |
| 99 | 0x2de92c6f, 0x4a7484aa, 0x5cb0a9dc, 0x76f988da,\r |
| 100 | 0x983e5152, 0xa831c66d, 0xb00327c8, 0xbf597fc7,\r |
| 101 | 0xc6e00bf3, 0xd5a79147, 0x06ca6351, 0x14292967,\r |
| 102 | 0x27b70a85, 0x2e1b2138, 0x4d2c6dfc, 0x53380d13,\r |
| 103 | 0x650a7354, 0x766a0abb, 0x81c2c92e, 0x92722c85,\r |
| 104 | 0xa2bfe8a1, 0xa81a664b, 0xc24b8b70, 0xc76c51a3,\r |
| 105 | 0xd192e819, 0xd6990624, 0xf40e3585, 0x106aa070,\r |
| 106 | 0x19a4c116, 0x1e376c08, 0x2748774c, 0x34b0bcb5,\r |
| 107 | 0x391c0cb3, 0x4ed8aa4a, 0x5b9cca4f, 0x682e6ff3,\r |
| 108 | 0x748f82ee, 0x78a5636f, 0x84c87814, 0x8cc70208,\r |
| 109 | 0x90befffa, 0xa4506ceb, 0xbef9a3f7, 0xc67178f2\r |
| 110 | };\r |
| 111 | \r |
| 112 | static void Sha256_WriteByteBlock(CSha256 *p)\r |
| 113 | {\r |
| 114 | UInt32 W[16];\r |
| 115 | unsigned j;\r |
| 116 | UInt32 *state;\r |
| 117 | \r |
| 118 | #ifdef _SHA256_UNROLL2\r |
| 119 | UInt32 a,b,c,d,e,f,g,h;\r |
| 120 | #else\r |
| 121 | UInt32 T[8];\r |
| 122 | #endif\r |
| 123 | \r |
| 124 | for (j = 0; j < 16; j += 4)\r |
| 125 | {\r |
| 126 | const Byte *ccc = p->buffer + j * 4;\r |
| 127 | W[j ] = GetBe32(ccc);\r |
| 128 | W[j + 1] = GetBe32(ccc + 4);\r |
| 129 | W[j + 2] = GetBe32(ccc + 8);\r |
| 130 | W[j + 3] = GetBe32(ccc + 12);\r |
| 131 | }\r |
| 132 | \r |
| 133 | state = p->state;\r |
| 134 | \r |
| 135 | #ifdef _SHA256_UNROLL2\r |
| 136 | a = state[0];\r |
| 137 | b = state[1];\r |
| 138 | c = state[2];\r |
| 139 | d = state[3];\r |
| 140 | e = state[4];\r |
| 141 | f = state[5];\r |
| 142 | g = state[6];\r |
| 143 | h = state[7];\r |
| 144 | #else\r |
| 145 | for (j = 0; j < 8; j++)\r |
| 146 | T[j] = state[j];\r |
| 147 | #endif\r |
| 148 | \r |
| 149 | for (j = 0; j < 64; j += 16)\r |
| 150 | {\r |
| 151 | RX_16\r |
| 152 | }\r |
| 153 | \r |
| 154 | #ifdef _SHA256_UNROLL2\r |
| 155 | state[0] += a;\r |
| 156 | state[1] += b;\r |
| 157 | state[2] += c;\r |
| 158 | state[3] += d;\r |
| 159 | state[4] += e;\r |
| 160 | state[5] += f;\r |
| 161 | state[6] += g;\r |
| 162 | state[7] += h;\r |
| 163 | #else\r |
| 164 | for (j = 0; j < 8; j++)\r |
| 165 | state[j] += T[j];\r |
| 166 | #endif\r |
| 167 | \r |
| 168 | /* Wipe variables */\r |
| 169 | /* memset(W, 0, sizeof(W)); */\r |
| 170 | /* memset(T, 0, sizeof(T)); */\r |
| 171 | }\r |
| 172 | \r |
| 173 | #undef S0\r |
| 174 | #undef S1\r |
| 175 | #undef s0\r |
| 176 | #undef s1\r |
| 177 | \r |
| 178 | void Sha256_Update(CSha256 *p, const Byte *data, size_t size)\r |
| 179 | {\r |
| 180 | if (size == 0)\r |
| 181 | return;\r |
| 182 | \r |
| 183 | {\r |
| 184 | unsigned pos = (unsigned)p->count & 0x3F;\r |
| 185 | unsigned num;\r |
| 186 | \r |
| 187 | p->count += size;\r |
| 188 | \r |
| 189 | num = 64 - pos;\r |
| 190 | if (num > size)\r |
| 191 | {\r |
| 192 | memcpy(p->buffer + pos, data, size);\r |
| 193 | return;\r |
| 194 | }\r |
| 195 | \r |
| 196 | size -= num;\r |
| 197 | memcpy(p->buffer + pos, data, num);\r |
| 198 | data += num;\r |
| 199 | }\r |
| 200 | \r |
| 201 | for (;;)\r |
| 202 | {\r |
| 203 | Sha256_WriteByteBlock(p);\r |
| 204 | if (size < 64)\r |
| 205 | break;\r |
| 206 | size -= 64;\r |
| 207 | memcpy(p->buffer, data, 64);\r |
| 208 | data += 64;\r |
| 209 | }\r |
| 210 | \r |
| 211 | if (size != 0)\r |
| 212 | memcpy(p->buffer, data, size);\r |
| 213 | }\r |
| 214 | \r |
| 215 | void Sha256_Final(CSha256 *p, Byte *digest)\r |
| 216 | {\r |
| 217 | unsigned pos = (unsigned)p->count & 0x3F;\r |
| 218 | unsigned i;\r |
| 219 | \r |
| 220 | p->buffer[pos++] = 0x80;\r |
| 221 | \r |
| 222 | while (pos != (64 - 8))\r |
| 223 | {\r |
| 224 | pos &= 0x3F;\r |
| 225 | if (pos == 0)\r |
| 226 | Sha256_WriteByteBlock(p);\r |
| 227 | p->buffer[pos++] = 0;\r |
| 228 | }\r |
| 229 | \r |
| 230 | {\r |
| 231 | UInt64 numBits = (p->count << 3);\r |
| 232 | SetBe32(p->buffer + 64 - 8, (UInt32)(numBits >> 32));\r |
| 233 | SetBe32(p->buffer + 64 - 4, (UInt32)(numBits));\r |
| 234 | }\r |
| 235 | \r |
| 236 | Sha256_WriteByteBlock(p);\r |
| 237 | \r |
| 238 | for (i = 0; i < 8; i += 2)\r |
| 239 | {\r |
| 240 | UInt32 v0 = p->state[i];\r |
| 241 | UInt32 v1 = p->state[i + 1];\r |
| 242 | SetBe32(digest , v0);\r |
| 243 | SetBe32(digest + 4, v1);\r |
| 244 | digest += 8;\r |
| 245 | }\r |
| 246 | \r |
| 247 | Sha256_Init(p);\r |
| 248 | }\r |