FFmpeg
camellia.c
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1 /*
2  * An implementation of the CAMELLIA algorithm as mentioned in RFC3713
3  * Copyright (c) 2014 Supraja Meedinti
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 "camellia.h"
25 #include "error.h"
26 #include "intreadwrite.h"
27 #include "mem.h"
28 #include "attributes.h"
29 
30 #define LR32(x,c) ((x) << (c) | (x) >> (32 - (c)))
31 #define RR32(x,c) ((x) >> (c) | (x) << (32 - (c)))
32 
33 #define MASK8 0xff
34 #define MASK32 0xffffffff
35 #define MASK64 0xffffffffffffffff
36 
37 #define Sigma1 0xA09E667F3BCC908B
38 #define Sigma2 0xB67AE8584CAA73B2
39 #define Sigma3 0xC6EF372FE94F82BE
40 #define Sigma4 0x54FF53A5F1D36F1C
41 #define Sigma5 0x10E527FADE682D1D
42 #define Sigma6 0xB05688C2B3E6C1FD
43 
44 static uint64_t SP[8][256];
45 
46 typedef struct AVCAMELLIA {
47  uint64_t Kw[4];
48  uint64_t Ke[6];
49  uint64_t K[24];
50  int key_bits;
51 } AVCAMELLIA;
52 
53 static const uint8_t SBOX1[256] = {
54 112, 130, 44, 236, 179, 39, 192, 229, 228, 133, 87, 53, 234, 12, 174, 65,
55  35, 239, 107, 147, 69, 25, 165, 33, 237, 14, 79, 78, 29, 101, 146, 189,
56 134, 184, 175, 143, 124, 235, 31, 206, 62, 48, 220, 95, 94, 197, 11, 26,
57 166, 225, 57, 202, 213, 71, 93, 61, 217, 1, 90, 214, 81, 86, 108, 77,
58 139, 13, 154, 102, 251, 204, 176, 45, 116, 18, 43, 32, 240, 177, 132, 153,
59 223, 76, 203, 194, 52, 126, 118, 5, 109, 183, 169, 49, 209, 23, 4, 215,
60  20, 88, 58, 97, 222, 27, 17, 28, 50, 15, 156, 22, 83, 24, 242, 34,
61 254, 68, 207, 178, 195, 181, 122, 145, 36, 8, 232, 168, 96, 252, 105, 80,
62 170, 208, 160, 125, 161, 137, 98, 151, 84, 91, 30, 149, 224, 255, 100, 210,
63  16, 196, 0, 72, 163, 247, 117, 219, 138, 3, 230, 218, 9, 63, 221, 148,
64 135, 92, 131, 2, 205, 74, 144, 51, 115, 103, 246, 243, 157, 127, 191, 226,
65  82, 155, 216, 38, 200, 55, 198, 59, 129, 150, 111, 75, 19, 190, 99, 46,
66 233, 121, 167, 140, 159, 110, 188, 142, 41, 245, 249, 182, 47, 253, 180, 89,
67 120, 152, 6, 106, 231, 70, 113, 186, 212, 37, 171, 66, 136, 162, 141, 250,
68 114, 7, 185, 85, 248, 238, 172, 10, 54, 73, 42, 104, 60, 56, 241, 164,
69  64, 40, 211, 123, 187, 201, 67, 193, 21, 227, 173, 244, 119, 199, 128, 158
70 };
71 
72 static const uint8_t SBOX2[256] = {
73 224, 5, 88, 217, 103, 78, 129, 203, 201, 11, 174, 106, 213, 24, 93, 130,
74  70, 223, 214, 39, 138, 50, 75, 66, 219, 28, 158, 156, 58, 202, 37, 123,
75  13, 113, 95, 31, 248, 215, 62, 157, 124, 96, 185, 190, 188, 139, 22, 52,
76  77, 195, 114, 149, 171, 142, 186, 122, 179, 2, 180, 173, 162, 172, 216, 154,
77  23, 26, 53, 204, 247, 153, 97, 90, 232, 36, 86, 64, 225, 99, 9, 51,
78 191, 152, 151, 133, 104, 252, 236, 10, 218, 111, 83, 98, 163, 46, 8, 175,
79  40, 176, 116, 194, 189, 54, 34, 56, 100, 30, 57, 44, 166, 48, 229, 68,
80 253, 136, 159, 101, 135, 107, 244, 35, 72, 16, 209, 81, 192, 249, 210, 160,
81  85, 161, 65, 250, 67, 19, 196, 47, 168, 182, 60, 43, 193, 255, 200, 165,
82  32, 137, 0, 144, 71, 239, 234, 183, 21, 6, 205, 181, 18, 126, 187, 41,
83  15, 184, 7, 4, 155, 148, 33, 102, 230, 206, 237, 231, 59, 254, 127, 197,
84 164, 55, 177, 76, 145, 110, 141, 118, 3, 45, 222, 150, 38, 125, 198, 92,
85 211, 242, 79, 25, 63, 220, 121, 29, 82, 235, 243, 109, 94, 251, 105, 178,
86 240, 49, 12, 212, 207, 140, 226, 117, 169, 74, 87, 132, 17, 69, 27, 245,
87 228, 14, 115, 170, 241, 221, 89, 20, 108, 146, 84, 208, 120, 112, 227, 73,
88 128, 80, 167, 246, 119, 147, 134, 131, 42, 199, 91, 233, 238, 143, 1, 61
89 };
90 
91 static const uint8_t SBOX3[256] = {
92  56, 65, 22, 118, 217, 147, 96, 242, 114, 194, 171, 154, 117, 6, 87, 160,
93 145, 247, 181, 201, 162, 140, 210, 144, 246, 7, 167, 39, 142, 178, 73, 222,
94  67, 92, 215, 199, 62, 245, 143, 103, 31, 24, 110, 175, 47, 226, 133, 13,
95  83, 240, 156, 101, 234, 163, 174, 158, 236, 128, 45, 107, 168, 43, 54, 166,
96 197, 134, 77, 51, 253, 102, 88, 150, 58, 9, 149, 16, 120, 216, 66, 204,
97 239, 38, 229, 97, 26, 63, 59, 130, 182, 219, 212, 152, 232, 139, 2, 235,
98  10, 44, 29, 176, 111, 141, 136, 14, 25, 135, 78, 11, 169, 12, 121, 17,
99 127, 34, 231, 89, 225, 218, 61, 200, 18, 4, 116, 84, 48, 126, 180, 40,
100  85, 104, 80, 190, 208, 196, 49, 203, 42, 173, 15, 202, 112, 255, 50, 105,
101  8, 98, 0, 36, 209, 251, 186, 237, 69, 129, 115, 109, 132, 159, 238, 74,
102 195, 46, 193, 1, 230, 37, 72, 153, 185, 179, 123, 249, 206, 191, 223, 113,
103  41, 205, 108, 19, 100, 155, 99, 157, 192, 75, 183, 165, 137, 95, 177, 23,
104 244, 188, 211, 70, 207, 55, 94, 71, 148, 250, 252, 91, 151, 254, 90, 172,
105  60, 76, 3, 53, 243, 35, 184, 93, 106, 146, 213, 33, 68, 81, 198, 125,
106  57, 131, 220, 170, 124, 119, 86, 5, 27, 164, 21, 52, 30, 28, 248, 82,
107  32, 20, 233, 189, 221, 228, 161, 224, 138, 241, 214, 122, 187, 227, 64, 79
108 };
109 
110 static const uint8_t SBOX4[256] = {
111 112, 44, 179, 192, 228, 87, 234, 174, 35, 107, 69, 165, 237, 79, 29, 146,
112 134, 175, 124, 31, 62, 220, 94, 11, 166, 57, 213, 93, 217, 90, 81, 108,
113 139, 154, 251, 176, 116, 43, 240, 132, 223, 203, 52, 118, 109, 169, 209, 4,
114  20, 58, 222, 17, 50, 156, 83, 242, 254, 207, 195, 122, 36, 232, 96, 105,
115 170, 160, 161, 98, 84, 30, 224, 100, 16, 0, 163, 117, 138, 230, 9, 221,
116 135, 131, 205, 144, 115, 246, 157, 191, 82, 216, 200, 198, 129, 111, 19, 99,
117 233, 167, 159, 188, 41, 249, 47, 180, 120, 6, 231, 113, 212, 171, 136, 141,
118 114, 185, 248, 172, 54, 42, 60, 241, 64, 211, 187, 67, 21, 173, 119, 128,
119 130, 236, 39, 229, 133, 53, 12, 65, 239, 147, 25, 33, 14, 78, 101, 189,
120 184, 143, 235, 206, 48, 95, 197, 26, 225, 202, 71, 61, 1, 214, 86, 77,
121  13, 102, 204, 45, 18, 32, 177, 153, 76, 194, 126, 5, 183, 49, 23, 215,
122  88, 97, 27, 28, 15, 22, 24, 34, 68, 178, 181, 145, 8, 168, 252, 80,
123 208, 125, 137, 151, 91, 149, 255, 210, 196, 72, 247, 219, 3, 218, 63, 148,
124  92, 2, 74, 51, 103, 243, 127, 226, 155, 38, 55, 59, 150, 75, 190, 46,
125 121, 140, 110, 142, 245, 182, 253, 89, 152, 106, 70, 186, 37, 66, 162, 250,
126  7, 85, 238, 10, 73, 104, 56, 164, 40, 123, 201, 193, 227, 244, 199, 158
127 };
128 
129 const int av_camellia_size = sizeof(AVCAMELLIA);
130 
131 static void LR128(uint64_t d[2], const uint64_t K[2], int x)
132 {
133  int i = 0;
134  if (64 <= x && x < 128) {
135  i = 1;
136  x -= 64;
137  }
138  if (x <= 0 || x >= 128) {
139  d[0] = K[i];
140  d[1] = K[!i];
141  return;
142  }
143  d[0] = (K[i] << x | K[!i] >> (64 - x));
144  d[1] = (K[!i] << x | K[i] >> (64 - x));
145 }
146 
147 static uint64_t F(uint64_t F_IN, uint64_t KE)
148 {
149  KE ^= F_IN;
150  F_IN=SP[0][KE >> 56]^SP[1][(KE >> 48) & MASK8]^SP[2][(KE >> 40) & MASK8]^SP[3][(KE >> 32) & MASK8]^SP[4][(KE >> 24) & MASK8]^SP[5][(KE >> 16) & MASK8]^SP[6][(KE >> 8) & MASK8]^SP[7][KE & MASK8];
151  return F_IN;
152 }
153 
154 static uint64_t FL(uint64_t FL_IN, uint64_t KE)
155 {
156  uint32_t x1, x2, k1, k2;
157  x1 = FL_IN >> 32;
158  x2 = FL_IN & MASK32;
159  k1 = KE >> 32;
160  k2 = KE & MASK32;
161  x2 = x2 ^ LR32((x1 & k1), 1);
162  x1 = x1 ^ (x2 | k2);
163  return ((uint64_t)x1 << 32) | (uint64_t)x2;
164 }
165 
166 static uint64_t FLINV(uint64_t FLINV_IN, uint64_t KE)
167 {
168  uint32_t x1, x2, k1, k2;
169  x1 = FLINV_IN >> 32;
170  x2 = FLINV_IN & MASK32;
171  k1 = KE >> 32;
172  k2 = KE & MASK32;
173  x1 = x1 ^ (x2 | k2);
174  x2 = x2 ^ LR32((x1 & k1), 1);
175  return ((uint64_t)x1 << 32) | (uint64_t)x2;
176 }
177 
178 static const uint8_t shifts[2][12] = {
179  {0, 15, 15, 45, 45, 60, 94, 94, 111},
180  {0, 15, 15, 30, 45, 45, 60, 60, 77, 94, 94, 111}
181 };
182 
183 static const uint8_t vars[2][12] = {
184  {2, 0, 2, 0, 2, 2, 0, 2, 0},
185  {3, 1, 2, 3, 0, 2, 1, 3, 0, 1, 2, 0}
186 };
187 
188 static void generate_round_keys(AVCAMELLIA *cs, uint64_t Kl[2], uint64_t Kr[2], uint64_t Ka[2], uint64_t Kb[2])
189 {
190  int i;
191  uint64_t *Kd[4], d[2];
192  Kd[0] = Kl;
193  Kd[1] = Kr;
194  Kd[2] = Ka;
195  Kd[3] = Kb;
196  cs->Kw[0] = Kl[0];
197  cs->Kw[1] = Kl[1];
198  if (cs->key_bits == 128) {
199  for (i = 0; i < 9; i++) {
200  LR128(d, Kd[vars[0][i]], shifts[0][i]);
201  cs->K[2*i] = d[0];
202  cs->K[2*i+1] = d[1];
203  }
204  LR128(d, Kd[0], 60);
205  cs->K[9] = d[1];
206  LR128(d, Kd[2], 30);
207  cs->Ke[0] = d[0];
208  cs->Ke[1] = d[1];
209  LR128(d, Kd[0], 77);
210  cs->Ke[2] = d[0];
211  cs->Ke[3] = d[1];
212  LR128(d, Kd[2], 111);
213  cs->Kw[2] = d[0];
214  cs->Kw[3] = d[1];
215  } else {
216  for (i = 0; i < 12; i++) {
217  LR128(d, Kd[vars[1][i]], shifts[1][i]);
218  cs->K[2*i] = d[0];
219  cs->K[2*i+1] = d[1];
220  }
221  LR128(d, Kd[1], 30);
222  cs->Ke[0] = d[0];
223  cs->Ke[1] = d[1];
224  LR128(d, Kd[0], 60);
225  cs->Ke[2] = d[0];
226  cs->Ke[3] = d[1];
227  LR128(d, Kd[2], 77);
228  cs->Ke[4] = d[0];
229  cs->Ke[5] = d[1];
230  LR128(d, Kd[3], 111);
231  cs->Kw[2] = d[0];
232  cs->Kw[3] = d[1];
233  }
234 }
235 
236 static void camellia_encrypt(AVCAMELLIA *cs, uint8_t *dst, const uint8_t *src)
237 {
238  uint64_t D1, D2;
239  D1 = AV_RB64(src);
240  D2 = AV_RB64(src + 8);
241  D1 ^= cs->Kw[0];
242  D2 ^= cs->Kw[1];
243  D2 ^= F(D1, cs->K[0]);
244  D1 ^= F(D2, cs->K[1]);
245  D2 ^= F(D1, cs->K[2]);
246  D1 ^= F(D2, cs->K[3]);
247  D2 ^= F(D1, cs->K[4]);
248  D1 ^= F(D2, cs->K[5]);
249  D1 = FL(D1, cs->Ke[0]);
250  D2 = FLINV(D2, cs->Ke[1]);
251  D2 ^= F(D1, cs->K[6]);
252  D1 ^= F(D2, cs->K[7]);
253  D2 ^= F(D1, cs->K[8]);
254  D1 ^= F(D2, cs->K[9]);
255  D2 ^= F(D1, cs->K[10]);
256  D1 ^= F(D2, cs->K[11]);
257  D1 = FL(D1, cs->Ke[2]);
258  D2 = FLINV(D2, cs->Ke[3]);
259  D2 ^= F(D1, cs->K[12]);
260  D1 ^= F(D2, cs->K[13]);
261  D2 ^= F(D1, cs->K[14]);
262  D1 ^= F(D2, cs->K[15]);
263  D2 ^= F(D1, cs->K[16]);
264  D1 ^= F(D2, cs->K[17]);
265  if (cs->key_bits != 128) {
266  D1 = FL(D1, cs->Ke[4]);
267  D2 = FLINV(D2, cs->Ke[5]);
268  D2 ^= F(D1, cs->K[18]);
269  D1 ^= F(D2, cs->K[19]);
270  D2 ^= F(D1, cs->K[20]);
271  D1 ^= F(D2, cs->K[21]);
272  D2 ^= F(D1, cs->K[22]);
273  D1 ^= F(D2, cs->K[23]);
274  }
275  D2 ^= cs->Kw[2];
276  D1 ^= cs->Kw[3];
277  AV_WB64(dst, D2);
278  AV_WB64(dst + 8, D1);
279 }
280 
281 static void camellia_decrypt(AVCAMELLIA *cs, uint8_t *dst, const uint8_t *src, uint8_t *iv)
282 {
283  uint64_t D1, D2;
284  D1 = AV_RB64(src);
285  D2 = AV_RB64(src + 8);
286  D1 ^= cs->Kw[2];
287  D2 ^= cs->Kw[3];
288  if (cs->key_bits != 128) {
289  D2 ^= F(D1, cs->K[23]);
290  D1 ^= F(D2, cs->K[22]);
291  D2 ^= F(D1, cs->K[21]);
292  D1 ^= F(D2, cs->K[20]);
293  D2 ^= F(D1, cs->K[19]);
294  D1 ^= F(D2, cs->K[18]);
295  D1 = FL(D1, cs->Ke[5]);
296  D2 = FLINV(D2, cs->Ke[4]);
297  }
298  D2 ^= F(D1, cs->K[17]);
299  D1 ^= F(D2, cs->K[16]);
300  D2 ^= F(D1, cs->K[15]);
301  D1 ^= F(D2, cs->K[14]);
302  D2 ^= F(D1, cs->K[13]);
303  D1 ^= F(D2, cs->K[12]);
304  D1 = FL(D1, cs->Ke[3]);
305  D2 = FLINV(D2, cs->Ke[2]);
306  D2 ^= F(D1, cs->K[11]);
307  D1 ^= F(D2, cs->K[10]);
308  D2 ^= F(D1, cs->K[9]);
309  D1 ^= F(D2, cs->K[8]);
310  D2 ^= F(D1, cs->K[7]);
311  D1 ^= F(D2, cs->K[6]);
312  D1 = FL(D1, cs->Ke[1]);
313  D2 = FLINV(D2, cs->Ke[0]);
314  D2 ^= F(D1, cs->K[5]);
315  D1 ^= F(D2, cs->K[4]);
316  D2 ^= F(D1, cs->K[3]);
317  D1 ^= F(D2, cs->K[2]);
318  D2 ^= F(D1, cs->K[1]);
319  D1 ^= F(D2, cs->K[0]);
320  D2 ^= cs->Kw[0];
321  D1 ^= cs->Kw[1];
322  if (iv) {
323  D2 ^= AV_RB64(iv);
324  D1 ^= AV_RB64(iv + 8);
325  memcpy(iv, src, 16);
326  }
327  AV_WB64(dst, D2);
328  AV_WB64(dst + 8, D1);
329 }
330 
331 static void computeSP(void)
332 {
333  uint64_t z;
334  int i;
335  for (i = 0; i < 256; i++) {
336  z = SBOX1[i];
337  SP[0][i] = (z << 56) ^ (z << 48) ^ (z << 40) ^ (z << 24) ^ z;
338  SP[7][i] = (z << 56) ^ (z << 48) ^ (z << 40) ^ (z << 24) ^ (z << 16) ^ (z << 8);
339  z = SBOX2[i];
340  SP[1][i] = (z << 48) ^ (z << 40) ^ (z << 32) ^ (z << 24) ^ (z << 16);
341  SP[4][i] = (z << 48) ^ (z << 40) ^ (z << 32) ^ (z << 16) ^ (z << 8) ^ z;
342  z = SBOX3[i];
343  SP[2][i] = (z << 56) ^ (z << 40) ^ (z << 32) ^ (z << 16) ^ (z << 8);
344  SP[5][i] = (z << 56) ^ (z << 40) ^ (z << 32) ^ (z << 24) ^ (z << 8) ^ z;
345  z = SBOX4[i];
346  SP[3][i] = (z << 56) ^ (z << 48) ^ (z << 32) ^ (z << 8) ^ z;
347  SP[6][i] = (z << 56) ^ (z << 48) ^ (z << 32) ^ (z << 24) ^ (z << 16) ^ z;
348  }
349 }
350 
351 struct AVCAMELLIA *av_camellia_alloc(void)
352 {
353  return av_mallocz(sizeof(struct AVCAMELLIA));
354 }
355 
356 av_cold int av_camellia_init(AVCAMELLIA *cs, const uint8_t *key, int key_bits)
357 {
358  uint64_t Kl[2], Kr[2], Ka[2], Kb[2];
359  uint64_t D1, D2;
360  if (key_bits != 128 && key_bits != 192 && key_bits != 256)
361  return AVERROR(EINVAL);
362  memset(Kb, 0, sizeof(Kb));
363  memset(Kr, 0, sizeof(Kr));
364  cs->key_bits = key_bits;
365  Kl[0] = AV_RB64(key);
366  Kl[1] = AV_RB64(key + 8);
367  if (key_bits == 192) {
368  Kr[0] = AV_RB64(key + 16);
369  Kr[1] = ~Kr[0];
370  } else if (key_bits == 256) {
371  Kr[0] = AV_RB64(key + 16);
372  Kr[1] = AV_RB64(key + 24);
373  }
374  computeSP();
375  D1 = Kl[0] ^ Kr[0];
376  D2 = Kl[1] ^ Kr[1];
377  D2 ^= F(D1, Sigma1);
378  D1 ^= F(D2, Sigma2);
379  D1 ^= Kl[0];
380  D2 ^= Kl[1];
381  D2 ^= F(D1, Sigma3);
382  D1 ^= F(D2, Sigma4);
383  Ka[0] = D1;
384  Ka[1] = D2;
385  if (key_bits != 128) {
386  D1 = Ka[0] ^ Kr[0];
387  D2 = Ka[1] ^ Kr[1];
388  D2 ^= F(D1, Sigma5);
389  D1 ^= F(D2, Sigma6);
390  Kb[0] = D1;
391  Kb[1] = D2;
392  }
393  generate_round_keys(cs, Kl, Kr, Ka, Kb);
394  return 0;
395 }
396 
397 void av_camellia_crypt(AVCAMELLIA *cs, uint8_t *dst, const uint8_t *src, int count, uint8_t *iv, int decrypt)
398 {
399  int i;
400  while (count--) {
401  if (decrypt) {
402  camellia_decrypt(cs, dst, src, iv);
403  } else {
404  if (iv) {
405  for (i = 0; i < 16; i++)
406  dst[i] = src[i] ^ iv[i];
407  camellia_encrypt(cs, dst, dst);
408  memcpy(iv, dst, 16);
409  } else {
410  camellia_encrypt(cs, dst, src);
411  }
412  }
413  src = src + 16;
414  dst = dst + 16;
415  }
416 }
Sigma2
#define Sigma2
Definition: camellia.c:38
AVERROR
Filter the word “frame” indicates either a video frame or a group of audio as stored in an AVFrame structure Format for each input and each output the list of supported formats For video that means pixel format For audio that means channel sample they are references to shared objects When the negotiation mechanism computes the intersection of the formats supported at each end of a all references to both lists are replaced with a reference to the intersection And when a single format is eventually chosen for a link amongst the remaining all references to the list are updated That means that if a filter requires that its input and output have the same format amongst a supported all it has to do is use a reference to the same list of formats query_formats can leave some formats unset and return AVERROR(EAGAIN) to cause the negotiation mechanism toagain later. That can be used by filters with complex requirements to use the format negotiated on one link to set the formats supported on another. Frame references ownership and permissions
MASK8
#define MASK8
Definition: camellia.c:33
av_camellia_alloc
struct AVCAMELLIA * av_camellia_alloc(void)
Allocate an AVCAMELLIA context To free the struct: av_free(ptr)
Definition: camellia.c:351
SBOX2
static const uint8_t SBOX2[256]
Definition: camellia.c:72
AVCAMELLIA::K
uint64_t K[24]
Definition: camellia.c:49
AVCAMELLIA
Definition: camellia.c:46
computeSP
static void computeSP(void)
Definition: camellia.c:331
AV_WB64
#define AV_WB64(p, v)
Definition: intreadwrite.h:431
Sigma6
#define Sigma6
Definition: camellia.c:42
LR128
static void LR128(uint64_t d[2], const uint64_t K[2], int x)
Definition: camellia.c:131
Sigma4
#define Sigma4
Definition: camellia.c:40
av_camellia_crypt
void av_camellia_crypt(AVCAMELLIA *cs, uint8_t *dst, const uint8_t *src, int count, uint8_t *iv, int decrypt)
Encrypt or decrypt a buffer using a previously initialized context.
Definition: camellia.c:397
av_cold
#define av_cold
Definition: attributes.h:90
Sigma1
#define Sigma1
Definition: camellia.c:37
intreadwrite.h
av_camellia_init
av_cold int av_camellia_init(AVCAMELLIA *cs, const uint8_t *key, int key_bits)
Initialize an AVCAMELLIA context.
Definition: camellia.c:356
av_camellia_size
const int av_camellia_size
Definition: camellia.c:129
key
const char * key
Definition: hwcontext_opencl.c:189
vars
static const uint8_t vars[2][12]
Definition: camellia.c:183
SBOX3
static const uint8_t SBOX3[256]
Definition: camellia.c:91
error.h
generate_round_keys
static void generate_round_keys(AVCAMELLIA *cs, uint64_t Kl[2], uint64_t Kr[2], uint64_t Ka[2], uint64_t Kb[2])
Definition: camellia.c:188
LR32
#define LR32(x, c)
Definition: camellia.c:30
AVCAMELLIA::Ke
uint64_t Ke[6]
Definition: camellia.c:48
camellia_decrypt
static void camellia_decrypt(AVCAMELLIA *cs, uint8_t *dst, const uint8_t *src, uint8_t *iv)
Definition: camellia.c:281
attributes.h
FLINV
static uint64_t FLINV(uint64_t FLINV_IN, uint64_t KE)
Definition: camellia.c:166
AVCAMELLIA::Kw
uint64_t Kw[4]
Definition: camellia.c:47
SBOX1
static const uint8_t SBOX1[256]
Definition: camellia.c:53
Sigma3
#define Sigma3
Definition: camellia.c:39
i
#define i(width, name, range_min, range_max)
Definition: cbs_h2645.c:255
SBOX4
static const uint8_t SBOX4[256]
Definition: camellia.c:110
av_mallocz
void * av_mallocz(size_t size)
Allocate a memory block with alignment suitable for all memory accesses (including vectors if availab...
Definition: mem.c:254
Sigma5
#define Sigma5
Definition: camellia.c:41
FL
static uint64_t FL(uint64_t FL_IN, uint64_t KE)
Definition: camellia.c:154
camellia_encrypt
static void camellia_encrypt(AVCAMELLIA *cs, uint8_t *dst, const uint8_t *src)
Definition: camellia.c:236
mem.h
AVCAMELLIA::key_bits
int key_bits
Definition: camellia.c:50
F
static uint64_t F(uint64_t F_IN, uint64_t KE)
Definition: camellia.c:147
src
INIT_CLIP pixel * src
Definition: h264pred_template.c:418
K
#define K
Definition: palette.c:25
d
d
Definition: ffmpeg_filter.c:409
SP
static uint64_t SP[8][256]
Definition: camellia.c:44
MASK32
#define MASK32
Definition: camellia.c:34
AV_RB64
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_WL32 unsigned int_TMPL AV_WL24 unsigned int_TMPL AV_WL16 uint64_t_TMPL AV_RB64
Definition: bytestream.h:95
shifts
static const uint8_t shifts[2][12]
Definition: camellia.c:178
camellia.h
Public header for libavutil CAMELLIA algorithm.
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