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1 | /* |
2 | * copyright (c) 2007 Michael Niedermayer <michaelni@gmx.at> | |
3 | * | |
4 | * This file is part of FFmpeg. | |
5 | * | |
6 | * FFmpeg is free software; you can redistribute it and/or | |
7 | * modify it under the terms of the GNU Lesser General Public | |
8 | * License as published by the Free Software Foundation; either | |
9 | * version 2.1 of the License, or (at your option) any later version. | |
10 | * | |
11 | * FFmpeg is distributed in the hope that it will be useful, | |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
14 | * Lesser General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU Lesser General Public | |
17 | * License along with FFmpeg; if not, write to the Free Software | |
18 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | |
19 | */ | |
20 | ||
21 | #ifndef AVUTIL_AES_H | |
22 | #define AVUTIL_AES_H | |
23 | ||
24 | #include <stdint.h> | |
25 | ||
26 | #include "attributes.h" | |
27 | #include "version.h" | |
28 | ||
29 | /** | |
30 | * @defgroup lavu_aes AES | |
31 | * @ingroup lavu_crypto | |
32 | * @{ | |
33 | */ | |
34 | ||
35 | extern const int av_aes_size; | |
36 | ||
37 | struct AVAES; | |
38 | ||
39 | /** | |
40 | * Allocate an AVAES context. | |
41 | */ | |
42 | struct AVAES *av_aes_alloc(void); | |
43 | ||
44 | /** | |
45 | * Initialize an AVAES context. | |
46 | * @param key_bits 128, 192 or 256 | |
47 | * @param decrypt 0 for encryption, 1 for decryption | |
48 | */ | |
49 | int av_aes_init(struct AVAES *a, const uint8_t *key, int key_bits, int decrypt); | |
50 | ||
51 | /** | |
52 | * Encrypt or decrypt a buffer using a previously initialized context. | |
53 | * @param count number of 16 byte blocks | |
54 | * @param dst destination array, can be equal to src | |
55 | * @param src source array, can be equal to dst | |
56 | * @param iv initialization vector for CBC mode, if NULL then ECB will be used | |
57 | * @param decrypt 0 for encryption, 1 for decryption | |
58 | */ | |
59 | void av_aes_crypt(struct AVAES *a, uint8_t *dst, const uint8_t *src, int count, uint8_t *iv, int decrypt); | |
60 | ||
61 | /** | |
62 | * @} | |
63 | */ | |
64 | ||
65 | #endif /* AVUTIL_AES_H */ |