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comparison lib/libavutil/aes.h @ 2134:992d2e6f907d

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preparation for libavcodec
author zipi
date Tue, 31 Dec 2013 14:52:14 +0000
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2133:e378232bfd36 2134:992d2e6f907d
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 */