aes.h 1.84 KB
Newer Older
1 2 3
/*
 * copyright (c) 2007 Michael Niedermayer <michaelni@gmx.at>
 *
4
 * This file is part of Libav.
5
 *
6
 * Libav is free software; you can redistribute it and/or
7 8 9 10
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
11
 * Libav is distributed in the hope that it will be useful,
12 13 14 15 16
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * 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 19 20
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
 */

21 22
#ifndef AVUTIL_AES_H
#define AVUTIL_AES_H
23

24 25
#include <stdint.h>

26 27 28
#include "attributes.h"
#include "version.h"

29 30 31 32 33 34
/**
 * @defgroup lavu_aes AES
 * @ingroup lavu_crypto
 * @{
 */

35 36 37
#if FF_API_CONTEXT_SIZE
extern attribute_deprecated const int av_aes_size;
#endif
38

39 40
struct AVAES;

41 42 43 44 45
/**
 * Allocate an AVAES context.
 */
struct AVAES *av_aes_alloc(void);

Michael Niedermayer's avatar
Michael Niedermayer committed
46
/**
47
 * Initialize an AVAES context.
Michael Niedermayer's avatar
Michael Niedermayer committed
48 49 50
 * @param key_bits 128, 192 or 256
 * @param decrypt 0 for encryption, 1 for decryption
 */
51
int av_aes_init(struct AVAES *a, const uint8_t *key, int key_bits, int decrypt);
Michael Niedermayer's avatar
Michael Niedermayer committed
52

Michael Niedermayer's avatar
Michael Niedermayer committed
53
/**
54
 * Encrypt or decrypt a buffer using a previously initialized context.
Michael Niedermayer's avatar
Michael Niedermayer committed
55 56 57
 * @param count number of 16 byte blocks
 * @param dst destination array, can be equal to src
 * @param src source array, can be equal to dst
Diego Biurrun's avatar
Diego Biurrun committed
58
 * @param iv initialization vector for CBC mode, if NULL then ECB will be used
Michael Niedermayer's avatar
Michael Niedermayer committed
59 60
 * @param decrypt 0 for encryption, 1 for decryption
 */
61
void av_aes_crypt(struct AVAES *a, uint8_t *dst, const uint8_t *src, int count, uint8_t *iv, int decrypt);
Michael Niedermayer's avatar
Michael Niedermayer committed
62

63 64 65 66
/**
 * @}
 */

67
#endif /* AVUTIL_AES_H */