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1/*
2 * Copyright (C) 2007 Michael Niedermayer <michaelni@gmx.at>
3 * Copyright (C) 2013 James Almer
4 *
5 * This file is part of FFmpeg.
6 *
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
11 *
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
16 *
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20 */
21
22#include <string.h>
23
24#include "attributes.h"
25#include "avutil.h"
26#include "bswap.h"
27#include "intreadwrite.h"
28#include "ripemd.h"
29#include "mem.h"
30
31/** hash context */
32typedef struct AVRIPEMD {
33 uint8_t digest_len; ///< digest length in 32-bit words
34 uint64_t count; ///< number of bytes in buffer
35 uint8_t buffer[64]; ///< 512-bit buffer of input values used in hash updating
36 uint32_t state[10]; ///< current hash value
37 /** function used to update hash for 512-bit input block */
38 void (*transform)(uint32_t *state, const uint8_t buffer[64]);
39} AVRIPEMD;
40
41const int av_ripemd_size = sizeof(AVRIPEMD);
42
43struct AVRIPEMD *av_ripemd_alloc(void)
44{
45 return av_mallocz(sizeof(struct AVRIPEMD));
46}
47
48static const uint32_t KA[4] = {
49 0x5a827999, 0x6ed9eba1, 0x8f1bbcdc, 0xa953fd4e
50};
51
52static const uint32_t KB[4] = {
53 0x50a28be6, 0x5c4dd124, 0x6d703ef3, 0x7a6d76e9
54};
55
56static const int ROTA[80] = {
57 11, 14, 15, 12, 5, 8, 7 , 9, 11, 13, 14, 15, 6, 7, 9, 8,
58 7 , 6, 8, 13, 11, 9, 7, 15, 7, 12, 15, 9, 11, 7, 13, 12,
59 11, 13, 6, 7, 14, 9, 13, 15, 14, 8, 13, 6, 5, 12, 7, 5,
60 11, 12, 14, 15, 14, 15, 9, 8, 9, 14, 5, 6, 8, 6, 5, 12,
61 9, 15, 5, 11, 6, 8, 13, 12, 5, 12, 13, 14, 11, 8, 5, 6
62};
63
64static const int ROTB[80] = {
65 8, 9, 9, 11, 13, 15, 15, 5, 7, 7, 8, 11, 14, 14, 12, 6,
66 9, 13, 15, 7, 12, 8, 9, 11, 7, 7, 12, 7, 6, 15, 13, 11,
67 9, 7, 15, 11, 8, 6, 6, 14, 12, 13, 5, 14, 13, 13, 7, 5,
68 15, 5, 8, 11, 14, 14, 6, 14, 6, 9, 12, 9, 12, 5, 15, 8,
69 8, 5, 12, 9, 12, 5, 14, 6, 8, 13, 6, 5, 15, 13, 11, 11
70};
71
72static const int WA[80] = {
73 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15,
74 7, 4, 13, 1, 10, 6, 15, 3, 12, 0, 9, 5, 2, 14, 11, 8,
75 3, 10, 14, 4, 9, 15, 8, 1, 2, 7, 0, 6, 13, 11, 5, 12,
76 1, 9, 11, 10, 0, 8, 12, 4, 13, 3, 7, 15, 14, 5, 6, 2,
77 4, 0, 5, 9, 7, 12, 2, 10, 14, 1, 3, 8, 11, 6, 15, 13
78};
79
80static const int WB[80] = {
81 5, 14, 7, 0, 9, 2, 11, 4, 13, 6, 15, 8, 1, 10, 3, 12,
82 6, 11, 3, 7, 0, 13, 5, 10, 14, 15, 8, 12, 4, 9, 1, 2,
83 15, 5, 1, 3, 7, 14, 6, 9, 11, 8, 12, 2, 10, 0, 4, 13,
84 8, 6, 4, 1, 3, 11, 15, 0, 5, 12, 2, 13, 9, 7, 10, 14,
85 12, 15, 10, 4, 1, 5, 8, 7, 6, 2, 13, 14, 0, 3, 9, 11
86};
87
88#define rol(value, bits) (((value) << (bits)) | ((value) >> (32 - (bits))))
89
90#define ROUND128_0_TO_15(a,b,c,d,e,f,g,h) \
91 a = rol(a + (( b ^ c ^ d) + block[WA[n]]), ROTA[n]); \
92 e = rol(e + ((((f ^ g) & h) ^ g) + block[WB[n]] + KB[0]), ROTB[n]); \
93 n++
94
95#define ROUND128_16_TO_31(a,b,c,d,e,f,g,h) \
96 a = rol(a + ((((c ^ d) & b) ^ d) + block[WA[n]] + KA[0]), ROTA[n]); \
97 e = rol(e + (((~g | f) ^ h) + block[WB[n]] + KB[1]), ROTB[n]); \
98 n++
99
100#define ROUND128_32_TO_47(a,b,c,d,e,f,g,h) \
101 a = rol(a + (((~c | b) ^ d) + block[WA[n]] + KA[1]), ROTA[n]); \
102 e = rol(e + ((((g ^ h) & f) ^ h) + block[WB[n]] + KB[2]), ROTB[n]); \
103 n++
104
105#define ROUND128_48_TO_63(a,b,c,d,e,f,g,h) \
106 a = rol(a + ((((b ^ c) & d) ^ c) + block[WA[n]] + KA[2]), ROTA[n]); \
107 e = rol(e + (( f ^ g ^ h) + block[WB[n]]), ROTB[n]); \
108 n++
109
110#define R128_0 \
111 ROUND128_0_TO_15(a,b,c,d,e,f,g,h); \
112 ROUND128_0_TO_15(d,a,b,c,h,e,f,g); \
113 ROUND128_0_TO_15(c,d,a,b,g,h,e,f); \
114 ROUND128_0_TO_15(b,c,d,a,f,g,h,e)
115
116#define R128_16 \
117 ROUND128_16_TO_31(a,b,c,d,e,f,g,h); \
118 ROUND128_16_TO_31(d,a,b,c,h,e,f,g); \
119 ROUND128_16_TO_31(c,d,a,b,g,h,e,f); \
120 ROUND128_16_TO_31(b,c,d,a,f,g,h,e)
121
122#define R128_32 \
123 ROUND128_32_TO_47(a,b,c,d,e,f,g,h); \
124 ROUND128_32_TO_47(d,a,b,c,h,e,f,g); \
125 ROUND128_32_TO_47(c,d,a,b,g,h,e,f); \
126 ROUND128_32_TO_47(b,c,d,a,f,g,h,e)
127
128#define R128_48 \
129 ROUND128_48_TO_63(a,b,c,d,e,f,g,h); \
130 ROUND128_48_TO_63(d,a,b,c,h,e,f,g); \
131 ROUND128_48_TO_63(c,d,a,b,g,h,e,f); \
132 ROUND128_48_TO_63(b,c,d,a,f,g,h,e)
133
134static void ripemd128_transform(uint32_t *state, const uint8_t buffer[64])
135{
136 uint32_t a, b, c, d, e, f, g, h, av_unused t;
137 uint32_t block[16];
138 int n;
139
140 a = e = state[0];
141 b = f = state[1];
142 c = g = state[2];
143 d = h = state[3];
144
145 for (n = 0; n < 16; n++)
146 block[n] = AV_RL32(buffer + 4 * n);
147 n = 0;
148
149#if CONFIG_SMALL
150 for (; n < 16;) {
151 ROUND128_0_TO_15(a,b,c,d,e,f,g,h);
152 t = d; d = c; c = b; b = a; a = t;
153 t = h; h = g; g = f; f = e; e = t;
154 }
155
156 for (; n < 32;) {
157 ROUND128_16_TO_31(a,b,c,d,e,f,g,h);
158 t = d; d = c; c = b; b = a; a = t;
159 t = h; h = g; g = f; f = e; e = t;
160 }
161
162 for (; n < 48;) {
163 ROUND128_32_TO_47(a,b,c,d,e,f,g,h);
164 t = d; d = c; c = b; b = a; a = t;
165 t = h; h = g; g = f; f = e; e = t;
166 }
167
168 for (; n < 64;) {
169 ROUND128_48_TO_63(a,b,c,d,e,f,g,h);
170 t = d; d = c; c = b; b = a; a = t;
171 t = h; h = g; g = f; f = e; e = t;
172 }
173#else
174
175 R128_0; R128_0; R128_0; R128_0;
176
177 R128_16; R128_16; R128_16; R128_16;
178
179 R128_32; R128_32; R128_32; R128_32;
180
181 R128_48; R128_48; R128_48; R128_48;
182#endif
183
184 h += c + state[1];
185 state[1] = state[2] + d + e;
186 state[2] = state[3] + a + f;
187 state[3] = state[0] + b + g;
188 state[0] = h;
189}
190
191static void ripemd256_transform(uint32_t *state, const uint8_t buffer[64])
192{
193 uint32_t a, b, c, d, e, f, g, h, av_unused t;
194 uint32_t block[16];
195 int n;
196
197 a = state[0]; b = state[1]; c = state[2]; d = state[3];
198 e = state[4]; f = state[5]; g = state[6]; h = state[7];
199
200 for (n = 0; n < 16; n++)
201 block[n] = AV_RL32(buffer + 4 * n);
202 n = 0;
203
204#if CONFIG_SMALL
205 for (; n < 16;) {
206 ROUND128_0_TO_15(a,b,c,d,e,f,g,h);
207 t = d; d = c; c = b; b = a; a = t;
208 t = h; h = g; g = f; f = e; e = t;
209 }
210 FFSWAP(uint32_t, a, e);
211
212 for (; n < 32;) {
213 ROUND128_16_TO_31(a,b,c,d,e,f,g,h);
214 t = d; d = c; c = b; b = a; a = t;
215 t = h; h = g; g = f; f = e; e = t;
216 }
217 FFSWAP(uint32_t, b, f);
218
219 for (; n < 48;) {
220 ROUND128_32_TO_47(a,b,c,d,e,f,g,h);
221 t = d; d = c; c = b; b = a; a = t;
222 t = h; h = g; g = f; f = e; e = t;
223 }
224 FFSWAP(uint32_t, c, g);
225
226 for (; n < 64;) {
227 ROUND128_48_TO_63(a,b,c,d,e,f,g,h);
228 t = d; d = c; c = b; b = a; a = t;
229 t = h; h = g; g = f; f = e; e = t;
230 }
231 FFSWAP(uint32_t, d, h);
232#else
233
234 R128_0; R128_0; R128_0; R128_0;
235 FFSWAP(uint32_t, a, e);
236
237 R128_16; R128_16; R128_16; R128_16;
238 FFSWAP(uint32_t, b, f);
239
240 R128_32; R128_32; R128_32; R128_32;
241 FFSWAP(uint32_t, c, g);
242
243 R128_48; R128_48; R128_48; R128_48;
244 FFSWAP(uint32_t, d, h);
245#endif
246
247 state[0] += a; state[1] += b; state[2] += c; state[3] += d;
248 state[4] += e; state[5] += f; state[6] += g; state[7] += h;
249}
250
251#define ROTATE(x,y) \
252 x = rol(x, 10); \
253 y = rol(y, 10); \
254 n++
255
256#define ROUND160_0_TO_15(a,b,c,d,e,f,g,h,i,j) \
257 a = rol(a + (( b ^ c ^ d) + block[WA[n]]), ROTA[n]) + e; \
258 f = rol(f + (((~i | h) ^ g) + block[WB[n]] + KB[0]), ROTB[n]) + j; \
259 ROTATE(c,h)
260
261#define ROUND160_16_TO_31(a,b,c,d,e,f,g,h,i,j) \
262 a = rol(a + ((((c ^ d) & b) ^ d) + block[WA[n]] + KA[0]), ROTA[n]) + e; \
263 f = rol(f + ((((g ^ h) & i) ^ h) + block[WB[n]] + KB[1]), ROTB[n]) + j; \
264 ROTATE(c,h)
265
266#define ROUND160_32_TO_47(a,b,c,d,e,f,g,h,i,j) \
267 a = rol(a + (((~c | b) ^ d) + block[WA[n]] + KA[1]), ROTA[n]) + e; \
268 f = rol(f + (((~h | g) ^ i) + block[WB[n]] + KB[2]), ROTB[n]) + j; \
269 ROTATE(c,h)
270
271#define ROUND160_48_TO_63(a,b,c,d,e,f,g,h,i,j) \
272 a = rol(a + ((((b ^ c) & d) ^ c) + block[WA[n]] + KA[2]), ROTA[n]) + e; \
273 f = rol(f + ((((h ^ i) & g) ^ i) + block[WB[n]] + KB[3]), ROTB[n]) + j; \
274 ROTATE(c,h)
275
276#define ROUND160_64_TO_79(a,b,c,d,e,f,g,h,i,j) \
277 a = rol(a + (((~d | c) ^ b) + block[WA[n]] + KA[3]), ROTA[n]) + e; \
278 f = rol(f + (( g ^ h ^ i) + block[WB[n]]), ROTB[n]) + j; \
279 ROTATE(c,h)
280
281#define R160_0 \
282 ROUND160_0_TO_15(a,b,c,d,e,f,g,h,i,j); \
283 ROUND160_0_TO_15(e,a,b,c,d,j,f,g,h,i); \
284 ROUND160_0_TO_15(d,e,a,b,c,i,j,f,g,h); \
285 ROUND160_0_TO_15(c,d,e,a,b,h,i,j,f,g); \
286 ROUND160_0_TO_15(b,c,d,e,a,g,h,i,j,f)
287
288#define R160_16 \
289 ROUND160_16_TO_31(e,a,b,c,d,j,f,g,h,i); \
290 ROUND160_16_TO_31(d,e,a,b,c,i,j,f,g,h); \
291 ROUND160_16_TO_31(c,d,e,a,b,h,i,j,f,g); \
292 ROUND160_16_TO_31(b,c,d,e,a,g,h,i,j,f); \
293 ROUND160_16_TO_31(a,b,c,d,e,f,g,h,i,j)
294
295#define R160_32 \
296 ROUND160_32_TO_47(d,e,a,b,c,i,j,f,g,h); \
297 ROUND160_32_TO_47(c,d,e,a,b,h,i,j,f,g); \
298 ROUND160_32_TO_47(b,c,d,e,a,g,h,i,j,f); \
299 ROUND160_32_TO_47(a,b,c,d,e,f,g,h,i,j); \
300 ROUND160_32_TO_47(e,a,b,c,d,j,f,g,h,i)
301
302#define R160_48 \
303 ROUND160_48_TO_63(c,d,e,a,b,h,i,j,f,g); \
304 ROUND160_48_TO_63(b,c,d,e,a,g,h,i,j,f); \
305 ROUND160_48_TO_63(a,b,c,d,e,f,g,h,i,j); \
306 ROUND160_48_TO_63(e,a,b,c,d,j,f,g,h,i); \
307 ROUND160_48_TO_63(d,e,a,b,c,i,j,f,g,h)
308
309#define R160_64 \
310 ROUND160_64_TO_79(b,c,d,e,a,g,h,i,j,f); \
311 ROUND160_64_TO_79(a,b,c,d,e,f,g,h,i,j); \
312 ROUND160_64_TO_79(e,a,b,c,d,j,f,g,h,i); \
313 ROUND160_64_TO_79(d,e,a,b,c,i,j,f,g,h); \
314 ROUND160_64_TO_79(c,d,e,a,b,h,i,j,f,g)
315
316static void ripemd160_transform(uint32_t *state, const uint8_t buffer[64])
317{
318 uint32_t a, b, c, d, e, f, g, h, i, j, av_unused t;
319 uint32_t block[16];
320 int n;
321
322 a = f = state[0];
323 b = g = state[1];
324 c = h = state[2];
325 d = i = state[3];
326 e = j = state[4];
327
328 for (n = 0; n < 16; n++)
329 block[n] = AV_RL32(buffer + 4 * n);
330 n = 0;
331
332#if CONFIG_SMALL
333 for (; n < 16;) {
334 ROUND160_0_TO_15(a,b,c,d,e,f,g,h,i,j);
335 t = e; e = d; d = c; c = b; b = a; a = t;
336 t = j; j = i; i = h; h = g; g = f; f = t;
337 }
338
339 for (; n < 32;) {
340 ROUND160_16_TO_31(a,b,c,d,e,f,g,h,i,j);
341 t = e; e = d; d = c; c = b; b = a; a = t;
342 t = j; j = i; i = h; h = g; g = f; f = t;
343 }
344
345 for (; n < 48;) {
346 ROUND160_32_TO_47(a,b,c,d,e,f,g,h,i,j);
347 t = e; e = d; d = c; c = b; b = a; a = t;
348 t = j; j = i; i = h; h = g; g = f; f = t;
349 }
350
351 for (; n < 64;) {
352 ROUND160_48_TO_63(a,b,c,d,e,f,g,h,i,j);
353 t = e; e = d; d = c; c = b; b = a; a = t;
354 t = j; j = i; i = h; h = g; g = f; f = t;
355 }
356
357 for (; n < 80;) {
358 ROUND160_64_TO_79(a,b,c,d,e,f,g,h,i,j);
359 t = e; e = d; d = c; c = b; b = a; a = t;
360 t = j; j = i; i = h; h = g; g = f; f = t;
361 }
362#else
363
364 R160_0; R160_0; R160_0;
365 ROUND160_0_TO_15(a,b,c,d,e,f,g,h,i,j);
366
367 R160_16; R160_16; R160_16;
368 ROUND160_16_TO_31(e,a,b,c,d,j,f,g,h,i);
369
370 R160_32; R160_32; R160_32;
371 ROUND160_32_TO_47(d,e,a,b,c,i,j,f,g,h);
372
373 R160_48; R160_48; R160_48;
374 ROUND160_48_TO_63(c,d,e,a,b,h,i,j,f,g);
375
376 R160_64; R160_64; R160_64;
377 ROUND160_64_TO_79(b,c,d,e,a,g,h,i,j,f);
378#endif
379
380 i += c + state[1];
381 state[1] = state[2] + d + j;
382 state[2] = state[3] + e + f;
383 state[3] = state[4] + a + g;
384 state[4] = state[0] + b + h;
385 state[0] = i;
386}
387
388static void ripemd320_transform(uint32_t *state, const uint8_t buffer[64])
389{
390 uint32_t a, b, c, d, e, f, g, h, i, j, av_unused t;
391 uint32_t block[16];
392 int n;
393
394 a = state[0]; b = state[1]; c = state[2]; d = state[3]; e = state[4];
395 f = state[5]; g = state[6]; h = state[7]; i = state[8]; j = state[9];
396
397 for (n = 0; n < 16; n++)
398 block[n] = AV_RL32(buffer + 4 * n);
399 n = 0;
400
401#if CONFIG_SMALL
402 for (; n < 16;) {
403 ROUND160_0_TO_15(a,b,c,d,e,f,g,h,i,j);
404 t = e; e = d; d = c; c = b; b = a; a = t;
405 t = j; j = i; i = h; h = g; g = f; f = t;
406 }
407 FFSWAP(uint32_t, b, g);
408
409 for (; n < 32;) {
410 ROUND160_16_TO_31(a,b,c,d,e,f,g,h,i,j);
411 t = e; e = d; d = c; c = b; b = a; a = t;
412 t = j; j = i; i = h; h = g; g = f; f = t;
413 }
414 FFSWAP(uint32_t, d, i);
415
416 for (; n < 48;) {
417 ROUND160_32_TO_47(a,b,c,d,e,f,g,h,i,j);
418 t = e; e = d; d = c; c = b; b = a; a = t;
419 t = j; j = i; i = h; h = g; g = f; f = t;
420 }
421 FFSWAP(uint32_t, a, f);
422
423 for (; n < 64;) {
424 ROUND160_48_TO_63(a,b,c,d,e,f,g,h,i,j);
425 t = e; e = d; d = c; c = b; b = a; a = t;
426 t = j; j = i; i = h; h = g; g = f; f = t;
427 }
428 FFSWAP(uint32_t, c, h);
429
430 for (; n < 80;) {
431 ROUND160_64_TO_79(a,b,c,d,e,f,g,h,i,j);
432 t = e; e = d; d = c; c = b; b = a; a = t;
433 t = j; j = i; i = h; h = g; g = f; f = t;
434 }
435 FFSWAP(uint32_t, e, j);
436#else
437
438 R160_0; R160_0; R160_0;
439 ROUND160_0_TO_15(a,b,c,d,e,f,g,h,i,j);
440 FFSWAP(uint32_t, a, f);
441
442 R160_16; R160_16; R160_16;
443 ROUND160_16_TO_31(e,a,b,c,d,j,f,g,h,i);
444 FFSWAP(uint32_t, b, g);
445
446 R160_32; R160_32; R160_32;
447 ROUND160_32_TO_47(d,e,a,b,c,i,j,f,g,h);
448 FFSWAP(uint32_t, c, h);
449
450 R160_48; R160_48; R160_48;
451 ROUND160_48_TO_63(c,d,e,a,b,h,i,j,f,g);
452 FFSWAP(uint32_t, d, i);
453
454 R160_64; R160_64; R160_64;
455 ROUND160_64_TO_79(b,c,d,e,a,g,h,i,j,f);
456 FFSWAP(uint32_t, e, j);
457#endif
458
459 state[0] += a; state[1] += b; state[2] += c; state[3] += d; state[4] += e;
460 state[5] += f; state[6] += g; state[7] += h; state[8] += i; state[9] += j;
461}
462
463av_cold int av_ripemd_init(AVRIPEMD *ctx, int bits)
464{
465 ctx->digest_len = bits >> 5;
466 switch (bits) {
467 case 128: // RIPEMD-128
468 ctx->state[0] = 0x67452301;
469 ctx->state[1] = 0xEFCDAB89;
470 ctx->state[2] = 0x98BADCFE;
471 ctx->state[3] = 0x10325476;
472 ctx->transform = ripemd128_transform;
473 break;
474 case 160: // RIPEMD-160
475 ctx->state[0] = 0x67452301;
476 ctx->state[1] = 0xEFCDAB89;
477 ctx->state[2] = 0x98BADCFE;
478 ctx->state[3] = 0x10325476;
479 ctx->state[4] = 0xC3D2E1F0;
480 ctx->transform = ripemd160_transform;
481 break;
482 case 256: // RIPEMD-256
483 ctx->state[0] = 0x67452301;
484 ctx->state[1] = 0xEFCDAB89;
485 ctx->state[2] = 0x98BADCFE;
486 ctx->state[3] = 0x10325476;
487 ctx->state[4] = 0x76543210;
488 ctx->state[5] = 0xFEDCBA98;
489 ctx->state[6] = 0x89ABCDEF;
490 ctx->state[7] = 0x01234567;
491 ctx->transform = ripemd256_transform;
492 break;
493 case 320: // RIPEMD-320
494 ctx->state[0] = 0x67452301;
495 ctx->state[1] = 0xEFCDAB89;
496 ctx->state[2] = 0x98BADCFE;
497 ctx->state[3] = 0x10325476;
498 ctx->state[4] = 0xC3D2E1F0;
499 ctx->state[5] = 0x76543210;
500 ctx->state[6] = 0xFEDCBA98;
501 ctx->state[7] = 0x89ABCDEF;
502 ctx->state[8] = 0x01234567;
503 ctx->state[9] = 0x3C2D1E0F;
504 ctx->transform = ripemd320_transform;
505 break;
506 default:
507 return AVERROR(EINVAL);
508 }
509 ctx->count = 0;
510 return 0;
511}
512
513void av_ripemd_update(AVRIPEMD* ctx, const uint8_t* data, unsigned int len)
514{
515 unsigned int i, j;
516
517 j = ctx->count & 63;
518 ctx->count += len;
519#if CONFIG_SMALL
520 for (i = 0; i < len; i++) {
521 ctx->buffer[j++] = data[i];
522 if (64 == j) {
523 ctx->transform(ctx->state, ctx->buffer);
524 j = 0;
525 }
526 }
527#else
528 if ((j + len) > 63) {
529 memcpy(&ctx->buffer[j], data, (i = 64 - j));
530 ctx->transform(ctx->state, ctx->buffer);
531 for (; i + 63 < len; i += 64)
532 ctx->transform(ctx->state, &data[i]);
533 j = 0;
534 } else
535 i = 0;
536 memcpy(&ctx->buffer[j], &data[i], len - i);
537#endif
538}
539
540void av_ripemd_final(AVRIPEMD* ctx, uint8_t *digest)
541{
542 int i;
543 uint64_t finalcount = av_le2ne64(ctx->count << 3);
544
545 av_ripemd_update(ctx, "\200", 1);
546 while ((ctx->count & 63) != 56)
547 av_ripemd_update(ctx, "", 1);
548 av_ripemd_update(ctx, (uint8_t *)&finalcount, 8); /* Should cause a transform() */
549 for (i = 0; i < ctx->digest_len; i++)
550 AV_WL32(digest + i*4, ctx->state[i]);
551}
552
generated by cgit at 2024-05-17 01:48:07 (GMT)