Mercurial > hg > forks > libbpg
comparison libavutil/des.h @ 0:772086c29cc7
Initial import.
author | Matti Hamalainen <ccr@tnsp.org> |
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date | Wed, 16 Nov 2016 11:16:33 +0200 |
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-1:000000000000 | 0:772086c29cc7 |
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1 /* | |
2 * DES encryption/decryption | |
3 * Copyright (c) 2007 Reimar Doeffinger | |
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 #ifndef AVUTIL_DES_H | |
23 #define AVUTIL_DES_H | |
24 | |
25 #include <stdint.h> | |
26 | |
27 struct AVDES { | |
28 uint64_t round_keys[3][16]; | |
29 int triple_des; | |
30 }; | |
31 | |
32 /** | |
33 * @brief Initializes an AVDES context. | |
34 * | |
35 * @param key_bits must be 64 or 192 | |
36 * @param decrypt 0 for encryption/CBC-MAC, 1 for decryption | |
37 */ | |
38 int av_des_init(struct AVDES *d, const uint8_t *key, int key_bits, int decrypt); | |
39 | |
40 /** | |
41 * @brief Encrypts / decrypts using the DES algorithm. | |
42 * | |
43 * @param count number of 8 byte blocks | |
44 * @param dst destination array, can be equal to src, must be 8-byte aligned | |
45 * @param src source array, can be equal to dst, must be 8-byte aligned, may be NULL | |
46 * @param iv initialization vector for CBC mode, if NULL then ECB will be used, | |
47 * must be 8-byte aligned | |
48 * @param decrypt 0 for encryption, 1 for decryption | |
49 */ | |
50 void av_des_crypt(struct AVDES *d, uint8_t *dst, const uint8_t *src, int count, uint8_t *iv, int decrypt); | |
51 | |
52 /** | |
53 * @brief Calculates CBC-MAC using the DES algorithm. | |
54 * | |
55 * @param count number of 8 byte blocks | |
56 * @param dst destination array, can be equal to src, must be 8-byte aligned | |
57 * @param src source array, can be equal to dst, must be 8-byte aligned, may be NULL | |
58 */ | |
59 void av_des_mac(struct AVDES *d, uint8_t *dst, const uint8_t *src, int count); | |
60 | |
61 #endif /* AVUTIL_DES_H */ |