1/*
2 * copyright (c) 2007 Michael Niedermayer <michaelni@gmx.at>
3 *
4 * This file is part of Libav.
5 *
6 * Libav 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 * Libav 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 Libav; 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/**
27 * @defgroup lavu_aes AES
28 * @ingroup lavu_crypto
29 * @{
30 */
31
32extern const int av_aes_size;
33
34struct AVAES;
35
36/**
37 * Initialize an AVAES context.
38 * @param key_bits 128, 192 or 256
39 * @param decrypt 0 for encryption, 1 for decryption
40 */
41int av_aes_init(struct AVAES *a, const uint8_t *key, int key_bits, int decrypt);
42
43/**
44 * Encrypt or decrypt a buffer using a previously initialized context.
45 * @param count number of 16 byte blocks
46 * @param dst destination array, can be equal to src
47 * @param src source array, can be equal to dst
48 * @param iv initialization vector for CBC mode, if NULL then ECB will be used
49 * @param decrypt 0 for encryption, 1 for decryption
50 */
51void av_aes_crypt(struct AVAES *a, uint8_t *dst, const uint8_t *src, int count, uint8_t *iv, int decrypt);
52
53/**
54 * @}
55 */
56
57#endif /* AVUTIL_AES_H */
58