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 <stddef.h>
23 #include <string.h>
24
25 #include "config.h"
26 #include "attributes.h"
27 #include "bswap.h"
28 #include "error.h"
29 #include "intreadwrite.h"
30 #include "macros.h"
31 #include "ripemd.h"
32 #include "mem.h"
33
34 /** hash context */
35 typedef struct AVRIPEMD {
36 uint8_t digest_len; ///< digest length in 32-bit words
37 uint64_t count; ///< number of bytes in buffer
38 uint8_t buffer[64]; ///< 512-bit buffer of input values used in hash updating
39 uint32_t state[10]; ///< current hash value
40 /** function used to update hash for 512-bit input block */
41 void (*transform)(uint32_t *state, const uint8_t buffer[64]);
42 } AVRIPEMD;
43
44 const int av_ripemd_size = sizeof(AVRIPEMD);
45
av_ripemd_alloc(void)46 struct AVRIPEMD *av_ripemd_alloc(void)
47 {
48 return av_mallocz(sizeof(struct AVRIPEMD));
49 }
50
51 static const uint32_t KA[4] = {
52 0x5a827999, 0x6ed9eba1, 0x8f1bbcdc, 0xa953fd4e
53 };
54
55 static const uint32_t KB[4] = {
56 0x50a28be6, 0x5c4dd124, 0x6d703ef3, 0x7a6d76e9
57 };
58
59 static const int ROTA[80] = {
60 11, 14, 15, 12, 5, 8, 7 , 9, 11, 13, 14, 15, 6, 7, 9, 8,
61 7 , 6, 8, 13, 11, 9, 7, 15, 7, 12, 15, 9, 11, 7, 13, 12,
62 11, 13, 6, 7, 14, 9, 13, 15, 14, 8, 13, 6, 5, 12, 7, 5,
63 11, 12, 14, 15, 14, 15, 9, 8, 9, 14, 5, 6, 8, 6, 5, 12,
64 9, 15, 5, 11, 6, 8, 13, 12, 5, 12, 13, 14, 11, 8, 5, 6
65 };
66
67 static const int ROTB[80] = {
68 8, 9, 9, 11, 13, 15, 15, 5, 7, 7, 8, 11, 14, 14, 12, 6,
69 9, 13, 15, 7, 12, 8, 9, 11, 7, 7, 12, 7, 6, 15, 13, 11,
70 9, 7, 15, 11, 8, 6, 6, 14, 12, 13, 5, 14, 13, 13, 7, 5,
71 15, 5, 8, 11, 14, 14, 6, 14, 6, 9, 12, 9, 12, 5, 15, 8,
72 8, 5, 12, 9, 12, 5, 14, 6, 8, 13, 6, 5, 15, 13, 11, 11
73 };
74
75 static const int WA[80] = {
76 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15,
77 7, 4, 13, 1, 10, 6, 15, 3, 12, 0, 9, 5, 2, 14, 11, 8,
78 3, 10, 14, 4, 9, 15, 8, 1, 2, 7, 0, 6, 13, 11, 5, 12,
79 1, 9, 11, 10, 0, 8, 12, 4, 13, 3, 7, 15, 14, 5, 6, 2,
80 4, 0, 5, 9, 7, 12, 2, 10, 14, 1, 3, 8, 11, 6, 15, 13
81 };
82
83 static const int WB[80] = {
84 5, 14, 7, 0, 9, 2, 11, 4, 13, 6, 15, 8, 1, 10, 3, 12,
85 6, 11, 3, 7, 0, 13, 5, 10, 14, 15, 8, 12, 4, 9, 1, 2,
86 15, 5, 1, 3, 7, 14, 6, 9, 11, 8, 12, 2, 10, 0, 4, 13,
87 8, 6, 4, 1, 3, 11, 15, 0, 5, 12, 2, 13, 9, 7, 10, 14,
88 12, 15, 10, 4, 1, 5, 8, 7, 6, 2, 13, 14, 0, 3, 9, 11
89 };
90
91 #define rol(value, bits) (((value) << (bits)) | ((value) >> (32 - (bits))))
92
93 #define ROUND128_0_TO_15(a,b,c,d,e,f,g,h) \
94 a = rol(a + (( b ^ c ^ d) + block[WA[n]]), ROTA[n]); \
95 e = rol(e + ((((f ^ g) & h) ^ g) + block[WB[n]] + KB[0]), ROTB[n]); \
96 n++
97
98 #define ROUND128_16_TO_31(a,b,c,d,e,f,g,h) \
99 a = rol(a + ((((c ^ d) & b) ^ d) + block[WA[n]] + KA[0]), ROTA[n]); \
100 e = rol(e + (((~g | f) ^ h) + block[WB[n]] + KB[1]), ROTB[n]); \
101 n++
102
103 #define ROUND128_32_TO_47(a,b,c,d,e,f,g,h) \
104 a = rol(a + (((~c | b) ^ d) + block[WA[n]] + KA[1]), ROTA[n]); \
105 e = rol(e + ((((g ^ h) & f) ^ h) + block[WB[n]] + KB[2]), ROTB[n]); \
106 n++
107
108 #define ROUND128_48_TO_63(a,b,c,d,e,f,g,h) \
109 a = rol(a + ((((b ^ c) & d) ^ c) + block[WA[n]] + KA[2]), ROTA[n]); \
110 e = rol(e + (( f ^ g ^ h) + block[WB[n]]), ROTB[n]); \
111 n++
112
113 #define R128_0 \
114 ROUND128_0_TO_15(a,b,c,d,e,f,g,h); \
115 ROUND128_0_TO_15(d,a,b,c,h,e,f,g); \
116 ROUND128_0_TO_15(c,d,a,b,g,h,e,f); \
117 ROUND128_0_TO_15(b,c,d,a,f,g,h,e)
118
119 #define R128_16 \
120 ROUND128_16_TO_31(a,b,c,d,e,f,g,h); \
121 ROUND128_16_TO_31(d,a,b,c,h,e,f,g); \
122 ROUND128_16_TO_31(c,d,a,b,g,h,e,f); \
123 ROUND128_16_TO_31(b,c,d,a,f,g,h,e)
124
125 #define R128_32 \
126 ROUND128_32_TO_47(a,b,c,d,e,f,g,h); \
127 ROUND128_32_TO_47(d,a,b,c,h,e,f,g); \
128 ROUND128_32_TO_47(c,d,a,b,g,h,e,f); \
129 ROUND128_32_TO_47(b,c,d,a,f,g,h,e)
130
131 #define R128_48 \
132 ROUND128_48_TO_63(a,b,c,d,e,f,g,h); \
133 ROUND128_48_TO_63(d,a,b,c,h,e,f,g); \
134 ROUND128_48_TO_63(c,d,a,b,g,h,e,f); \
135 ROUND128_48_TO_63(b,c,d,a,f,g,h,e)
136
ripemd128_transform(uint32_t * state,const uint8_t buffer[64])137 static void ripemd128_transform(uint32_t *state, const uint8_t buffer[64])
138 {
139 uint32_t a, b, c, d, e, f, g, h, av_unused t;
140 uint32_t block[16];
141 int n;
142
143 a = e = state[0];
144 b = f = state[1];
145 c = g = state[2];
146 d = h = state[3];
147
148 for (n = 0; n < 16; n++)
149 block[n] = AV_RL32(buffer + 4 * n);
150 n = 0;
151
152 #if CONFIG_SMALL
153 for (; n < 16;) {
154 ROUND128_0_TO_15(a,b,c,d,e,f,g,h);
155 t = d; d = c; c = b; b = a; a = t;
156 t = h; h = g; g = f; f = e; e = t;
157 }
158
159 for (; n < 32;) {
160 ROUND128_16_TO_31(a,b,c,d,e,f,g,h);
161 t = d; d = c; c = b; b = a; a = t;
162 t = h; h = g; g = f; f = e; e = t;
163 }
164
165 for (; n < 48;) {
166 ROUND128_32_TO_47(a,b,c,d,e,f,g,h);
167 t = d; d = c; c = b; b = a; a = t;
168 t = h; h = g; g = f; f = e; e = t;
169 }
170
171 for (; n < 64;) {
172 ROUND128_48_TO_63(a,b,c,d,e,f,g,h);
173 t = d; d = c; c = b; b = a; a = t;
174 t = h; h = g; g = f; f = e; e = t;
175 }
176 #else
177
178 R128_0; R128_0; R128_0; R128_0;
179
180 R128_16; R128_16; R128_16; R128_16;
181
182 R128_32; R128_32; R128_32; R128_32;
183
184 R128_48; R128_48; R128_48; R128_48;
185 #endif
186
187 h += c + state[1];
188 state[1] = state[2] + d + e;
189 state[2] = state[3] + a + f;
190 state[3] = state[0] + b + g;
191 state[0] = h;
192 }
193
ripemd256_transform(uint32_t * state,const uint8_t buffer[64])194 static void ripemd256_transform(uint32_t *state, const uint8_t buffer[64])
195 {
196 uint32_t a, b, c, d, e, f, g, h, av_unused t;
197 uint32_t block[16];
198 int n;
199
200 a = state[0]; b = state[1]; c = state[2]; d = state[3];
201 e = state[4]; f = state[5]; g = state[6]; h = state[7];
202
203 for (n = 0; n < 16; n++)
204 block[n] = AV_RL32(buffer + 4 * n);
205 n = 0;
206
207 #if CONFIG_SMALL
208 for (; n < 16;) {
209 ROUND128_0_TO_15(a,b,c,d,e,f,g,h);
210 t = d; d = c; c = b; b = a; a = t;
211 t = h; h = g; g = f; f = e; e = t;
212 }
213 FFSWAP(uint32_t, a, e);
214
215 for (; n < 32;) {
216 ROUND128_16_TO_31(a,b,c,d,e,f,g,h);
217 t = d; d = c; c = b; b = a; a = t;
218 t = h; h = g; g = f; f = e; e = t;
219 }
220 FFSWAP(uint32_t, b, f);
221
222 for (; n < 48;) {
223 ROUND128_32_TO_47(a,b,c,d,e,f,g,h);
224 t = d; d = c; c = b; b = a; a = t;
225 t = h; h = g; g = f; f = e; e = t;
226 }
227 FFSWAP(uint32_t, c, g);
228
229 for (; n < 64;) {
230 ROUND128_48_TO_63(a,b,c,d,e,f,g,h);
231 t = d; d = c; c = b; b = a; a = t;
232 t = h; h = g; g = f; f = e; e = t;
233 }
234 FFSWAP(uint32_t, d, h);
235 #else
236
237 R128_0; R128_0; R128_0; R128_0;
238 FFSWAP(uint32_t, a, e);
239
240 R128_16; R128_16; R128_16; R128_16;
241 FFSWAP(uint32_t, b, f);
242
243 R128_32; R128_32; R128_32; R128_32;
244 FFSWAP(uint32_t, c, g);
245
246 R128_48; R128_48; R128_48; R128_48;
247 FFSWAP(uint32_t, d, h);
248 #endif
249
250 state[0] += a; state[1] += b; state[2] += c; state[3] += d;
251 state[4] += e; state[5] += f; state[6] += g; state[7] += h;
252 }
253
254 #define ROTATE(x,y) \
255 x = rol(x, 10); \
256 y = rol(y, 10); \
257 n++
258
259 #define ROUND160_0_TO_15(a,b,c,d,e,f,g,h,i,j) \
260 a = rol(a + (( b ^ c ^ d) + block[WA[n]]), ROTA[n]) + e; \
261 f = rol(f + (((~i | h) ^ g) + block[WB[n]] + KB[0]), ROTB[n]) + j; \
262 ROTATE(c,h)
263
264 #define ROUND160_16_TO_31(a,b,c,d,e,f,g,h,i,j) \
265 a = rol(a + ((((c ^ d) & b) ^ d) + block[WA[n]] + KA[0]), ROTA[n]) + e; \
266 f = rol(f + ((((g ^ h) & i) ^ h) + block[WB[n]] + KB[1]), ROTB[n]) + j; \
267 ROTATE(c,h)
268
269 #define ROUND160_32_TO_47(a,b,c,d,e,f,g,h,i,j) \
270 a = rol(a + (((~c | b) ^ d) + block[WA[n]] + KA[1]), ROTA[n]) + e; \
271 f = rol(f + (((~h | g) ^ i) + block[WB[n]] + KB[2]), ROTB[n]) + j; \
272 ROTATE(c,h)
273
274 #define ROUND160_48_TO_63(a,b,c,d,e,f,g,h,i,j) \
275 a = rol(a + ((((b ^ c) & d) ^ c) + block[WA[n]] + KA[2]), ROTA[n]) + e; \
276 f = rol(f + ((((h ^ i) & g) ^ i) + block[WB[n]] + KB[3]), ROTB[n]) + j; \
277 ROTATE(c,h)
278
279 #define ROUND160_64_TO_79(a,b,c,d,e,f,g,h,i,j) \
280 a = rol(a + (((~d | c) ^ b) + block[WA[n]] + KA[3]), ROTA[n]) + e; \
281 f = rol(f + (( g ^ h ^ i) + block[WB[n]]), ROTB[n]) + j; \
282 ROTATE(c,h)
283
284 #define R160_0 \
285 ROUND160_0_TO_15(a,b,c,d,e,f,g,h,i,j); \
286 ROUND160_0_TO_15(e,a,b,c,d,j,f,g,h,i); \
287 ROUND160_0_TO_15(d,e,a,b,c,i,j,f,g,h); \
288 ROUND160_0_TO_15(c,d,e,a,b,h,i,j,f,g); \
289 ROUND160_0_TO_15(b,c,d,e,a,g,h,i,j,f)
290
291 #define R160_16 \
292 ROUND160_16_TO_31(e,a,b,c,d,j,f,g,h,i); \
293 ROUND160_16_TO_31(d,e,a,b,c,i,j,f,g,h); \
294 ROUND160_16_TO_31(c,d,e,a,b,h,i,j,f,g); \
295 ROUND160_16_TO_31(b,c,d,e,a,g,h,i,j,f); \
296 ROUND160_16_TO_31(a,b,c,d,e,f,g,h,i,j)
297
298 #define R160_32 \
299 ROUND160_32_TO_47(d,e,a,b,c,i,j,f,g,h); \
300 ROUND160_32_TO_47(c,d,e,a,b,h,i,j,f,g); \
301 ROUND160_32_TO_47(b,c,d,e,a,g,h,i,j,f); \
302 ROUND160_32_TO_47(a,b,c,d,e,f,g,h,i,j); \
303 ROUND160_32_TO_47(e,a,b,c,d,j,f,g,h,i)
304
305 #define R160_48 \
306 ROUND160_48_TO_63(c,d,e,a,b,h,i,j,f,g); \
307 ROUND160_48_TO_63(b,c,d,e,a,g,h,i,j,f); \
308 ROUND160_48_TO_63(a,b,c,d,e,f,g,h,i,j); \
309 ROUND160_48_TO_63(e,a,b,c,d,j,f,g,h,i); \
310 ROUND160_48_TO_63(d,e,a,b,c,i,j,f,g,h)
311
312 #define R160_64 \
313 ROUND160_64_TO_79(b,c,d,e,a,g,h,i,j,f); \
314 ROUND160_64_TO_79(a,b,c,d,e,f,g,h,i,j); \
315 ROUND160_64_TO_79(e,a,b,c,d,j,f,g,h,i); \
316 ROUND160_64_TO_79(d,e,a,b,c,i,j,f,g,h); \
317 ROUND160_64_TO_79(c,d,e,a,b,h,i,j,f,g)
318
ripemd160_transform(uint32_t * state,const uint8_t buffer[64])319 static void ripemd160_transform(uint32_t *state, const uint8_t buffer[64])
320 {
321 uint32_t a, b, c, d, e, f, g, h, i, j, av_unused t;
322 uint32_t block[16];
323 int n;
324
325 a = f = state[0];
326 b = g = state[1];
327 c = h = state[2];
328 d = i = state[3];
329 e = j = state[4];
330
331 for (n = 0; n < 16; n++)
332 block[n] = AV_RL32(buffer + 4 * n);
333 n = 0;
334
335 #if CONFIG_SMALL
336 for (; n < 16;) {
337 ROUND160_0_TO_15(a,b,c,d,e,f,g,h,i,j);
338 t = e; e = d; d = c; c = b; b = a; a = t;
339 t = j; j = i; i = h; h = g; g = f; f = t;
340 }
341
342 for (; n < 32;) {
343 ROUND160_16_TO_31(a,b,c,d,e,f,g,h,i,j);
344 t = e; e = d; d = c; c = b; b = a; a = t;
345 t = j; j = i; i = h; h = g; g = f; f = t;
346 }
347
348 for (; n < 48;) {
349 ROUND160_32_TO_47(a,b,c,d,e,f,g,h,i,j);
350 t = e; e = d; d = c; c = b; b = a; a = t;
351 t = j; j = i; i = h; h = g; g = f; f = t;
352 }
353
354 for (; n < 64;) {
355 ROUND160_48_TO_63(a,b,c,d,e,f,g,h,i,j);
356 t = e; e = d; d = c; c = b; b = a; a = t;
357 t = j; j = i; i = h; h = g; g = f; f = t;
358 }
359
360 for (; n < 80;) {
361 ROUND160_64_TO_79(a,b,c,d,e,f,g,h,i,j);
362 t = e; e = d; d = c; c = b; b = a; a = t;
363 t = j; j = i; i = h; h = g; g = f; f = t;
364 }
365 #else
366
367 R160_0; R160_0; R160_0;
368 ROUND160_0_TO_15(a,b,c,d,e,f,g,h,i,j);
369
370 R160_16; R160_16; R160_16;
371 ROUND160_16_TO_31(e,a,b,c,d,j,f,g,h,i);
372
373 R160_32; R160_32; R160_32;
374 ROUND160_32_TO_47(d,e,a,b,c,i,j,f,g,h);
375
376 R160_48; R160_48; R160_48;
377 ROUND160_48_TO_63(c,d,e,a,b,h,i,j,f,g);
378
379 R160_64; R160_64; R160_64;
380 ROUND160_64_TO_79(b,c,d,e,a,g,h,i,j,f);
381 #endif
382
383 i += c + state[1];
384 state[1] = state[2] + d + j;
385 state[2] = state[3] + e + f;
386 state[3] = state[4] + a + g;
387 state[4] = state[0] + b + h;
388 state[0] = i;
389 }
390
ripemd320_transform(uint32_t * state,const uint8_t buffer[64])391 static void ripemd320_transform(uint32_t *state, const uint8_t buffer[64])
392 {
393 uint32_t a, b, c, d, e, f, g, h, i, j, av_unused t;
394 uint32_t block[16];
395 int n;
396
397 a = state[0]; b = state[1]; c = state[2]; d = state[3]; e = state[4];
398 f = state[5]; g = state[6]; h = state[7]; i = state[8]; j = state[9];
399
400 for (n = 0; n < 16; n++)
401 block[n] = AV_RL32(buffer + 4 * n);
402 n = 0;
403
404 #if CONFIG_SMALL
405 for (; n < 16;) {
406 ROUND160_0_TO_15(a,b,c,d,e,f,g,h,i,j);
407 t = e; e = d; d = c; c = b; b = a; a = t;
408 t = j; j = i; i = h; h = g; g = f; f = t;
409 }
410 FFSWAP(uint32_t, b, g);
411
412 for (; n < 32;) {
413 ROUND160_16_TO_31(a,b,c,d,e,f,g,h,i,j);
414 t = e; e = d; d = c; c = b; b = a; a = t;
415 t = j; j = i; i = h; h = g; g = f; f = t;
416 }
417 FFSWAP(uint32_t, d, i);
418
419 for (; n < 48;) {
420 ROUND160_32_TO_47(a,b,c,d,e,f,g,h,i,j);
421 t = e; e = d; d = c; c = b; b = a; a = t;
422 t = j; j = i; i = h; h = g; g = f; f = t;
423 }
424 FFSWAP(uint32_t, a, f);
425
426 for (; n < 64;) {
427 ROUND160_48_TO_63(a,b,c,d,e,f,g,h,i,j);
428 t = e; e = d; d = c; c = b; b = a; a = t;
429 t = j; j = i; i = h; h = g; g = f; f = t;
430 }
431 FFSWAP(uint32_t, c, h);
432
433 for (; n < 80;) {
434 ROUND160_64_TO_79(a,b,c,d,e,f,g,h,i,j);
435 t = e; e = d; d = c; c = b; b = a; a = t;
436 t = j; j = i; i = h; h = g; g = f; f = t;
437 }
438 FFSWAP(uint32_t, e, j);
439 #else
440
441 R160_0; R160_0; R160_0;
442 ROUND160_0_TO_15(a,b,c,d,e,f,g,h,i,j);
443 FFSWAP(uint32_t, a, f);
444
445 R160_16; R160_16; R160_16;
446 ROUND160_16_TO_31(e,a,b,c,d,j,f,g,h,i);
447 FFSWAP(uint32_t, b, g);
448
449 R160_32; R160_32; R160_32;
450 ROUND160_32_TO_47(d,e,a,b,c,i,j,f,g,h);
451 FFSWAP(uint32_t, c, h);
452
453 R160_48; R160_48; R160_48;
454 ROUND160_48_TO_63(c,d,e,a,b,h,i,j,f,g);
455 FFSWAP(uint32_t, d, i);
456
457 R160_64; R160_64; R160_64;
458 ROUND160_64_TO_79(b,c,d,e,a,g,h,i,j,f);
459 FFSWAP(uint32_t, e, j);
460 #endif
461
462 state[0] += a; state[1] += b; state[2] += c; state[3] += d; state[4] += e;
463 state[5] += f; state[6] += g; state[7] += h; state[8] += i; state[9] += j;
464 }
465
av_ripemd_init(AVRIPEMD * ctx,int bits)466 av_cold int av_ripemd_init(AVRIPEMD *ctx, int bits)
467 {
468 ctx->digest_len = bits >> 5;
469 switch (bits) {
470 case 128: // RIPEMD-128
471 ctx->state[0] = 0x67452301;
472 ctx->state[1] = 0xEFCDAB89;
473 ctx->state[2] = 0x98BADCFE;
474 ctx->state[3] = 0x10325476;
475 ctx->transform = ripemd128_transform;
476 break;
477 case 160: // RIPEMD-160
478 ctx->state[0] = 0x67452301;
479 ctx->state[1] = 0xEFCDAB89;
480 ctx->state[2] = 0x98BADCFE;
481 ctx->state[3] = 0x10325476;
482 ctx->state[4] = 0xC3D2E1F0;
483 ctx->transform = ripemd160_transform;
484 break;
485 case 256: // RIPEMD-256
486 ctx->state[0] = 0x67452301;
487 ctx->state[1] = 0xEFCDAB89;
488 ctx->state[2] = 0x98BADCFE;
489 ctx->state[3] = 0x10325476;
490 ctx->state[4] = 0x76543210;
491 ctx->state[5] = 0xFEDCBA98;
492 ctx->state[6] = 0x89ABCDEF;
493 ctx->state[7] = 0x01234567;
494 ctx->transform = ripemd256_transform;
495 break;
496 case 320: // RIPEMD-320
497 ctx->state[0] = 0x67452301;
498 ctx->state[1] = 0xEFCDAB89;
499 ctx->state[2] = 0x98BADCFE;
500 ctx->state[3] = 0x10325476;
501 ctx->state[4] = 0xC3D2E1F0;
502 ctx->state[5] = 0x76543210;
503 ctx->state[6] = 0xFEDCBA98;
504 ctx->state[7] = 0x89ABCDEF;
505 ctx->state[8] = 0x01234567;
506 ctx->state[9] = 0x3C2D1E0F;
507 ctx->transform = ripemd320_transform;
508 break;
509 default:
510 return AVERROR(EINVAL);
511 }
512 ctx->count = 0;
513 return 0;
514 }
515
av_ripemd_update(AVRIPEMD * ctx,const uint8_t * data,size_t len)516 void av_ripemd_update(AVRIPEMD* ctx, const uint8_t* data, size_t len)
517 {
518 unsigned int j;
519 size_t i;
520
521 j = ctx->count & 63;
522 ctx->count += len;
523 #if CONFIG_SMALL
524 for (i = 0; i < len; i++) {
525 ctx->buffer[j++] = data[i];
526 if (64 == j) {
527 ctx->transform(ctx->state, ctx->buffer);
528 j = 0;
529 }
530 }
531 #else
532 if (len >= 64 - j) {
533 const uint8_t *end;
534 memcpy(&ctx->buffer[j], data, (i = 64 - j));
535 ctx->transform(ctx->state, ctx->buffer);
536 data += i;
537 len -= i;
538 end = data + (len & ~63);
539 len = len % 64;
540 for (; data < end; data += 64)
541 ctx->transform(ctx->state, data);
542 j = 0;
543 }
544 memcpy(&ctx->buffer[j], data, len);
545 #endif
546 }
547
av_ripemd_final(AVRIPEMD * ctx,uint8_t * digest)548 void av_ripemd_final(AVRIPEMD* ctx, uint8_t *digest)
549 {
550 int i;
551 uint64_t finalcount = av_le2ne64(ctx->count << 3);
552
553 av_ripemd_update(ctx, "\200", 1);
554 while ((ctx->count & 63) != 56)
555 av_ripemd_update(ctx, "", 1);
556 av_ripemd_update(ctx, (uint8_t *)&finalcount, 8); /* Should cause a transform() */
557 for (i = 0; i < ctx->digest_len; i++)
558 AV_WL32(digest + i*4, ctx->state[i]);
559 }
560