ce188d4d |
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 |