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/libavutil/aes.h

http://github.com/FFmpeg/FFmpeg
C Header | 65 lines | 11 code | 11 blank | 43 comment | 0 complexity | e8db198ab8d731dc87db15b9d547540e MD5 | raw file
 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
35extern const int av_aes_size;
36
37struct AVAES;
38
39/**
40 * Allocate an AVAES context.
41 */
42struct 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 */
49int 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 */
59void 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 */