1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
|
/*
* Copyright (C) 2007 Michael Niedermayer <michaelni@gmx.at>
* Copyright (C) 2009 Konstantin Shishkov
* Copyright (C) 2013 James Almer
* based on BSD-licensed SHA-2 code by Aaron D. Gifford
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <string.h>
#include "attributes.h"
#include "avutil.h"
#include "bswap.h"
#include "sha512.h"
#include "intreadwrite.h"
#include "mem.h"
/** hash context */
typedef struct AVSHA512 {
uint8_t digest_len; ///< digest length in 64-bit words
uint64_t count; ///< number of bytes in buffer
uint8_t buffer[128]; ///< 1024-bit buffer of input values used in hash updating
uint64_t state[8]; ///< current hash value
} AVSHA512;
const int av_sha512_size = sizeof(AVSHA512);
struct AVSHA512 *av_sha512_alloc(void)
{
return av_mallocz(sizeof(struct AVSHA512));
}
static const uint64_t K512[80] = {
UINT64_C(0x428a2f98d728ae22), UINT64_C(0x7137449123ef65cd),
UINT64_C(0xb5c0fbcfec4d3b2f), UINT64_C(0xe9b5dba58189dbbc),
UINT64_C(0x3956c25bf348b538), UINT64_C(0x59f111f1b605d019),
UINT64_C(0x923f82a4af194f9b), UINT64_C(0xab1c5ed5da6d8118),
UINT64_C(0xd807aa98a3030242), UINT64_C(0x12835b0145706fbe),
UINT64_C(0x243185be4ee4b28c), UINT64_C(0x550c7dc3d5ffb4e2),
UINT64_C(0x72be5d74f27b896f), UINT64_C(0x80deb1fe3b1696b1),
UINT64_C(0x9bdc06a725c71235), UINT64_C(0xc19bf174cf692694),
UINT64_C(0xe49b69c19ef14ad2), UINT64_C(0xefbe4786384f25e3),
UINT64_C(0x0fc19dc68b8cd5b5), UINT64_C(0x240ca1cc77ac9c65),
UINT64_C(0x2de92c6f592b0275), UINT64_C(0x4a7484aa6ea6e483),
UINT64_C(0x5cb0a9dcbd41fbd4), UINT64_C(0x76f988da831153b5),
UINT64_C(0x983e5152ee66dfab), UINT64_C(0xa831c66d2db43210),
UINT64_C(0xb00327c898fb213f), UINT64_C(0xbf597fc7beef0ee4),
UINT64_C(0xc6e00bf33da88fc2), UINT64_C(0xd5a79147930aa725),
UINT64_C(0x06ca6351e003826f), UINT64_C(0x142929670a0e6e70),
UINT64_C(0x27b70a8546d22ffc), UINT64_C(0x2e1b21385c26c926),
UINT64_C(0x4d2c6dfc5ac42aed), UINT64_C(0x53380d139d95b3df),
UINT64_C(0x650a73548baf63de), UINT64_C(0x766a0abb3c77b2a8),
UINT64_C(0x81c2c92e47edaee6), UINT64_C(0x92722c851482353b),
UINT64_C(0xa2bfe8a14cf10364), UINT64_C(0xa81a664bbc423001),
UINT64_C(0xc24b8b70d0f89791), UINT64_C(0xc76c51a30654be30),
UINT64_C(0xd192e819d6ef5218), UINT64_C(0xd69906245565a910),
UINT64_C(0xf40e35855771202a), UINT64_C(0x106aa07032bbd1b8),
UINT64_C(0x19a4c116b8d2d0c8), UINT64_C(0x1e376c085141ab53),
UINT64_C(0x2748774cdf8eeb99), UINT64_C(0x34b0bcb5e19b48a8),
UINT64_C(0x391c0cb3c5c95a63), UINT64_C(0x4ed8aa4ae3418acb),
UINT64_C(0x5b9cca4f7763e373), UINT64_C(0x682e6ff3d6b2b8a3),
UINT64_C(0x748f82ee5defb2fc), UINT64_C(0x78a5636f43172f60),
UINT64_C(0x84c87814a1f0ab72), UINT64_C(0x8cc702081a6439ec),
UINT64_C(0x90befffa23631e28), UINT64_C(0xa4506cebde82bde9),
UINT64_C(0xbef9a3f7b2c67915), UINT64_C(0xc67178f2e372532b),
UINT64_C(0xca273eceea26619c), UINT64_C(0xd186b8c721c0c207),
UINT64_C(0xeada7dd6cde0eb1e), UINT64_C(0xf57d4f7fee6ed178),
UINT64_C(0x06f067aa72176fba), UINT64_C(0x0a637dc5a2c898a6),
UINT64_C(0x113f9804bef90dae), UINT64_C(0x1b710b35131c471b),
UINT64_C(0x28db77f523047d84), UINT64_C(0x32caab7b40c72493),
UINT64_C(0x3c9ebe0a15c9bebc), UINT64_C(0x431d67c49c100d4c),
UINT64_C(0x4cc5d4becb3e42b6), UINT64_C(0x597f299cfc657e2a),
UINT64_C(0x5fcb6fab3ad6faec), UINT64_C(0x6c44198c4a475817),
};
#define ror(value, bits) (((value) >> (bits)) | ((value) << (64 - (bits))))
#define Ch(x,y,z) (((x) & ((y) ^ (z))) ^ (z))
#define Maj(z,y,x) ((((x) | (y)) & (z)) | ((x) & (y)))
#define Sigma0_512(x) (ror((x), 28) ^ ror((x), 34) ^ ror((x), 39))
#define Sigma1_512(x) (ror((x), 14) ^ ror((x), 18) ^ ror((x), 41))
#define sigma0_512(x) (ror((x), 1) ^ ror((x), 8) ^ ((x) >> 7))
#define sigma1_512(x) (ror((x), 19) ^ ror((x), 61) ^ ((x) >> 6))
#define blk0(i) (block[i] = AV_RB64(buffer + 8 * (i)))
#define blk(i) (block[i] = block[i - 16] + sigma0_512(block[i - 15]) + \
sigma1_512(block[i - 2]) + block[i - 7])
#define ROUND512(a,b,c,d,e,f,g,h) \
T1 += (h) + Sigma1_512(e) + Ch((e), (f), (g)) + K512[i]; \
(d) += T1; \
(h) = T1 + Sigma0_512(a) + Maj((a), (b), (c)); \
i++
#define ROUND512_0_TO_15(a,b,c,d,e,f,g,h) \
T1 = blk0(i); \
ROUND512(a,b,c,d,e,f,g,h)
#define ROUND512_16_TO_80(a,b,c,d,e,f,g,h) \
T1 = blk(i); \
ROUND512(a,b,c,d,e,f,g,h)
static void sha512_transform(uint64_t *state, const uint8_t buffer[128])
{
uint64_t a, b, c, d, e, f, g, h;
uint64_t block[80];
uint64_t T1;
int i;
a = state[0];
b = state[1];
c = state[2];
d = state[3];
e = state[4];
f = state[5];
g = state[6];
h = state[7];
#if CONFIG_SMALL
for (i = 0; i < 80; i++) {
uint64_t T2;
if (i < 16)
T1 = blk0(i);
else
T1 = blk(i);
T1 += h + Sigma1_512(e) + Ch(e, f, g) + K512[i];
T2 = Sigma0_512(a) + Maj(a, b, c);
h = g;
g = f;
f = e;
e = d + T1;
d = c;
c = b;
b = a;
a = T1 + T2;
}
#else
#define R512_0 \
ROUND512_0_TO_15(a, b, c, d, e, f, g, h); \
ROUND512_0_TO_15(h, a, b, c, d, e, f, g); \
ROUND512_0_TO_15(g, h, a, b, c, d, e, f); \
ROUND512_0_TO_15(f, g, h, a, b, c, d, e); \
ROUND512_0_TO_15(e, f, g, h, a, b, c, d); \
ROUND512_0_TO_15(d, e, f, g, h, a, b, c); \
ROUND512_0_TO_15(c, d, e, f, g, h, a, b); \
ROUND512_0_TO_15(b, c, d, e, f, g, h, a)
i = 0;
R512_0; R512_0;
#define R512_16 \
ROUND512_16_TO_80(a, b, c, d, e, f, g, h); \
ROUND512_16_TO_80(h, a, b, c, d, e, f, g); \
ROUND512_16_TO_80(g, h, a, b, c, d, e, f); \
ROUND512_16_TO_80(f, g, h, a, b, c, d, e); \
ROUND512_16_TO_80(e, f, g, h, a, b, c, d); \
ROUND512_16_TO_80(d, e, f, g, h, a, b, c); \
ROUND512_16_TO_80(c, d, e, f, g, h, a, b); \
ROUND512_16_TO_80(b, c, d, e, f, g, h, a)
R512_16; R512_16; R512_16; R512_16;
R512_16; R512_16; R512_16; R512_16;
#endif
state[0] += a;
state[1] += b;
state[2] += c;
state[3] += d;
state[4] += e;
state[5] += f;
state[6] += g;
state[7] += h;
}
av_cold int av_sha512_init(AVSHA512 *ctx, int bits)
{
ctx->digest_len = bits >> 6;
switch (bits) {
case 224: // SHA-512/224
ctx->state[0] = UINT64_C(0x8C3D37C819544DA2);
ctx->state[1] = UINT64_C(0x73E1996689DCD4D6);
ctx->state[2] = UINT64_C(0x1DFAB7AE32FF9C82);
ctx->state[3] = UINT64_C(0x679DD514582F9FCF);
ctx->state[4] = UINT64_C(0x0F6D2B697BD44DA8);
ctx->state[5] = UINT64_C(0x77E36F7304C48942);
ctx->state[6] = UINT64_C(0x3F9D85A86A1D36C8);
ctx->state[7] = UINT64_C(0x1112E6AD91D692A1);
break;
case 256: // SHA-512/256
ctx->state[0] = UINT64_C(0x22312194FC2BF72C);
ctx->state[1] = UINT64_C(0x9F555FA3C84C64C2);
ctx->state[2] = UINT64_C(0x2393B86B6F53B151);
ctx->state[3] = UINT64_C(0x963877195940EABD);
ctx->state[4] = UINT64_C(0x96283EE2A88EFFE3);
ctx->state[5] = UINT64_C(0xBE5E1E2553863992);
ctx->state[6] = UINT64_C(0x2B0199FC2C85B8AA);
ctx->state[7] = UINT64_C(0x0EB72DDC81C52CA2);
break;
case 384: // SHA-384
ctx->state[0] = UINT64_C(0xCBBB9D5DC1059ED8);
ctx->state[1] = UINT64_C(0x629A292A367CD507);
ctx->state[2] = UINT64_C(0x9159015A3070DD17);
ctx->state[3] = UINT64_C(0x152FECD8F70E5939);
ctx->state[4] = UINT64_C(0x67332667FFC00B31);
ctx->state[5] = UINT64_C(0x8EB44A8768581511);
ctx->state[6] = UINT64_C(0xDB0C2E0D64F98FA7);
ctx->state[7] = UINT64_C(0x47B5481DBEFA4FA4);
break;
case 512: // SHA-512
ctx->state[0] = UINT64_C(0x6A09E667F3BCC908);
ctx->state[1] = UINT64_C(0xBB67AE8584CAA73B);
ctx->state[2] = UINT64_C(0x3C6EF372FE94F82B);
ctx->state[3] = UINT64_C(0xA54FF53A5F1D36F1);
ctx->state[4] = UINT64_C(0x510E527FADE682D1);
ctx->state[5] = UINT64_C(0x9B05688C2B3E6C1F);
ctx->state[6] = UINT64_C(0x1F83D9ABFB41BD6B);
ctx->state[7] = UINT64_C(0x5BE0CD19137E2179);
break;
default:
return AVERROR(EINVAL);
}
ctx->count = 0;
return 0;
}
void av_sha512_update(AVSHA512* ctx, const uint8_t* data, unsigned int len)
{
unsigned int i, j;
j = ctx->count & 127;
ctx->count += len;
#if CONFIG_SMALL
for (i = 0; i < len; i++) {
ctx->buffer[j++] = data[i];
if (128 == j) {
sha512_transform(ctx->state, ctx->buffer);
j = 0;
}
}
#else
if ((j + len) > 127) {
memcpy(&ctx->buffer[j], data, (i = 128 - j));
sha512_transform(ctx->state, ctx->buffer);
for (; i + 127 < len; i += 128)
sha512_transform(ctx->state, &data[i]);
j = 0;
} else
i = 0;
memcpy(&ctx->buffer[j], &data[i], len - i);
#endif
}
void av_sha512_final(AVSHA512* ctx, uint8_t *digest)
{
uint64_t i = 0;
uint64_t finalcount = av_be2ne64(ctx->count << 3);
av_sha512_update(ctx, "\200", 1);
while ((ctx->count & 127) != 112)
av_sha512_update(ctx, "", 1);
av_sha512_update(ctx, (uint8_t *)&i, 8);
av_sha512_update(ctx, (uint8_t *)&finalcount, 8); /* Should cause a transform() */
for (i = 0; i < ctx->digest_len; i++)
AV_WB64(digest + i*8, ctx->state[i]);
if (ctx->digest_len & 1) /* SHA512/224 is 28 bytes, and is not divisible by 8. */
AV_WB32(digest + i*8, ctx->state[i] >> 32);
}
|
