char-fork/llama.cpp

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1/* Crypto/Sha256.c -- SHA-256 Hash
22010-06-11 : Igor Pavlov : Public domain
3This code is based on public domain code from Wei Dai's Crypto++ library. */
4
5#include "rotate-bits/rotate-bits.h"
6#include "sha256.h"
7
8/* define it for speed optimization */
9#define _SHA256_UNROLL
10#define _SHA256_UNROLL2
11
12void
13sha256_init(sha256_t *p)
14{
15  p->state[0] = 0x6a09e667;
16  p->state[1] = 0xbb67ae85;
17  p->state[2] = 0x3c6ef372;
18  p->state[3] = 0xa54ff53a;
19  p->state[4] = 0x510e527f;
20  p->state[5] = 0x9b05688c;
21  p->state[6] = 0x1f83d9ab;
22  p->state[7] = 0x5be0cd19;
23  p->count = 0;
24}
25
26#define S0(x) (ROTR32(x, 2) ^ ROTR32(x,13) ^ ROTR32(x, 22))
27#define S1(x) (ROTR32(x, 6) ^ ROTR32(x,11) ^ ROTR32(x, 25))
28#define s0(x) (ROTR32(x, 7) ^ ROTR32(x,18) ^ (x >> 3))
29#define s1(x) (ROTR32(x,17) ^ ROTR32(x,19) ^ (x >> 10))
30
31#define blk0(i) (W[i] = data[i])
32#define blk2(i) (W[i&15] += s1(W[(i-2)&15]) + W[(i-7)&15] + s0(W[(i-15)&15]))
33
34#define Ch(x,y,z) (z^(x&(y^z)))
35#define Maj(x,y,z) ((x&y)|(z&(x|y)))
36
37#define a(i) T[(0-(i))&7]
38#define b(i) T[(1-(i))&7]
39#define c(i) T[(2-(i))&7]
40#define d(i) T[(3-(i))&7]
41#define e(i) T[(4-(i))&7]
42#define f(i) T[(5-(i))&7]
43#define g(i) T[(6-(i))&7]
44#define h(i) T[(7-(i))&7]
45
46
47#ifdef _SHA256_UNROLL2
48
49#define R(a,b,c,d,e,f,g,h, i) h += S1(e) + Ch(e,f,g) + K[i+j] + (j?blk2(i):blk0(i));\
50  d += h; h += S0(a) + Maj(a, b, c)
51
52#define RX_8(i) \
53  R(a,b,c,d,e,f,g,h, i); \
54  R(h,a,b,c,d,e,f,g, (i+1)); \
55  R(g,h,a,b,c,d,e,f, (i+2)); \
56  R(f,g,h,a,b,c,d,e, (i+3)); \
57  R(e,f,g,h,a,b,c,d, (i+4)); \
58  R(d,e,f,g,h,a,b,c, (i+5)); \
59  R(c,d,e,f,g,h,a,b, (i+6)); \
60  R(b,c,d,e,f,g,h,a, (i+7))
61
62#else
63
64#define R(i) h(i) += S1(e(i)) + Ch(e(i),f(i),g(i)) + K[i+j] + (j?blk2(i):blk0(i));\
65  d(i) += h(i); h(i) += S0(a(i)) + Maj(a(i), b(i), c(i))
66
67#ifdef _SHA256_UNROLL
68
69#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);
70
71#endif
72
73#endif
74
75static const uint32_t K[64] = {
76  0x428a2f98, 0x71374491, 0xb5c0fbcf, 0xe9b5dba5,
77  0x3956c25b, 0x59f111f1, 0x923f82a4, 0xab1c5ed5,
78  0xd807aa98, 0x12835b01, 0x243185be, 0x550c7dc3,
79  0x72be5d74, 0x80deb1fe, 0x9bdc06a7, 0xc19bf174,
80  0xe49b69c1, 0xefbe4786, 0x0fc19dc6, 0x240ca1cc,
81  0x2de92c6f, 0x4a7484aa, 0x5cb0a9dc, 0x76f988da,
82  0x983e5152, 0xa831c66d, 0xb00327c8, 0xbf597fc7,
83  0xc6e00bf3, 0xd5a79147, 0x06ca6351, 0x14292967,
84  0x27b70a85, 0x2e1b2138, 0x4d2c6dfc, 0x53380d13,
85  0x650a7354, 0x766a0abb, 0x81c2c92e, 0x92722c85,
86  0xa2bfe8a1, 0xa81a664b, 0xc24b8b70, 0xc76c51a3,
87  0xd192e819, 0xd6990624, 0xf40e3585, 0x106aa070,
88  0x19a4c116, 0x1e376c08, 0x2748774c, 0x34b0bcb5,
89  0x391c0cb3, 0x4ed8aa4a, 0x5b9cca4f, 0x682e6ff3,
90  0x748f82ee, 0x78a5636f, 0x84c87814, 0x8cc70208,
91  0x90befffa, 0xa4506ceb, 0xbef9a3f7, 0xc67178f2
92};
93
94static void
95sha256_transform(uint32_t *state, const uint32_t *data)
96{
97  uint32_t W[16] = {0};
98  unsigned j;
99  #ifdef _SHA256_UNROLL2
100  uint32_t a,b,c,d,e,f,g,h;
101  a = state[0];
102  b = state[1];
103  c = state[2];
104  d = state[3];
105  e = state[4];
106  f = state[5];
107  g = state[6];
108  h = state[7];
109  #else
110  uint32_t T[8];
111  for (j = 0; j < 8; j++)
112    T[j] = state[j];
113  #endif
114
115  for (j = 0; j < 64; j += 16)
116  {
117    #if defined(_SHA256_UNROLL) || defined(_SHA256_UNROLL2)
118    RX_8(0); RX_8(8);
119    #else
120    unsigned i;
121    for (i = 0; i < 16; i++) { R(i); }
122    #endif
123  }
124
125  #ifdef _SHA256_UNROLL2
126  state[0] += a;
127  state[1] += b;
128  state[2] += c;
129  state[3] += d;
130  state[4] += e;
131  state[5] += f;
132  state[6] += g;
133  state[7] += h;
134  #else
135  for (j = 0; j < 8; j++)
136    state[j] += T[j];
137  #endif
138
139  /* Wipe variables */
140  /* memset(W, 0, sizeof(W)); */
141  /* memset(T, 0, sizeof(T)); */
142}
143
144#undef S0
145#undef S1
146#undef s0
147#undef s1
148
149static void
150sha256_write_byte_block(sha256_t *p)
151{
152  uint32_t data32[16];
153  unsigned i;
154  for (i = 0; i < 16; i++)
155    data32[i] =
156      ((uint32_t)(p->buffer[i * 4    ]) << 24) +
157      ((uint32_t)(p->buffer[i * 4 + 1]) << 16) +
158      ((uint32_t)(p->buffer[i * 4 + 2]) <<  8) +
159      ((uint32_t)(p->buffer[i * 4 + 3]));
160  sha256_transform(p->state, data32);
161}
162
163
164void
165sha256_hash(unsigned char *buf, const unsigned char *data, size_t size)
166{
167  sha256_t hash;
168  sha256_init(&hash);
169  sha256_update(&hash, data, size);
170  sha256_final(&hash, buf);
171}
172
173
174void
175sha256_update(sha256_t *p, const unsigned char *data, size_t size)
176{
177  uint32_t curBufferPos = (uint32_t)p->count & 0x3F;
178  while (size > 0)
179  {
180    p->buffer[curBufferPos++] = *data++;
181    p->count++;
182    size--;
183    if (curBufferPos == 64)
184    {
185      curBufferPos = 0;
186      sha256_write_byte_block(p);
187    }
188  }
189}
190
191
192void
193sha256_final(sha256_t *p, unsigned char *digest)
194{
195  uint64_t lenInBits = (p->count << 3);
196  uint32_t curBufferPos = (uint32_t)p->count & 0x3F;
197  unsigned i;
198  p->buffer[curBufferPos++] = 0x80;
199  while (curBufferPos != (64 - 8))
200  {
201    curBufferPos &= 0x3F;
202    if (curBufferPos == 0)
203      sha256_write_byte_block(p);
204    p->buffer[curBufferPos++] = 0;
205  }
206  for (i = 0; i < 8; i++)
207  {
208    p->buffer[curBufferPos++] = (unsigned char)(lenInBits >> 56);
209    lenInBits <<= 8;
210  }
211  sha256_write_byte_block(p);
212
213  for (i = 0; i < 8; i++)
214  {
215    *digest++ = (unsigned char)(p->state[i] >> 24);
216    *digest++ = (unsigned char)(p->state[i] >> 16);
217    *digest++ = (unsigned char)(p->state[i] >> 8);
218    *digest++ = (unsigned char)(p->state[i]);
219  }
220  sha256_init(p);
221}