FFmpeg 5.1.6
aes.h
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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
28/**
29 * @defgroup lavu_aes AES
30 * @ingroup lavu_crypto
31 * @{
32 */
33
34extern const int av_aes_size;
35
36struct AVAES;
37
38/**
39 * Allocate an AVAES context.
40 */
41struct AVAES *av_aes_alloc(void);
42
43/**
44 * Initialize an AVAES context.
45 * @param key_bits 128, 192 or 256
46 * @param decrypt 0 for encryption, 1 for decryption
47 */
48int av_aes_init(struct AVAES *a, const uint8_t *key, int key_bits, int decrypt);
49
50/**
51 * Encrypt or decrypt a buffer using a previously initialized context.
52 * @param count number of 16 byte blocks
53 * @param dst destination array, can be equal to src
54 * @param src source array, can be equal to dst
55 * @param iv initialization vector for CBC mode, if NULL then ECB will be used
56 * @param decrypt 0 for encryption, 1 for decryption
57 */
58void av_aes_crypt(struct AVAES *a, uint8_t *dst, const uint8_t *src, int count, uint8_t *iv, int decrypt);
59
60/**
61 * @}
62 */
63
64#endif /* AVUTIL_AES_H */
Macro definitions for various function/variable attributes.
const int av_aes_size
struct AVAES * av_aes_alloc(void)
Allocate an AVAES context.
int av_aes_init(struct AVAES *a, const uint8_t *key, int key_bits, int decrypt)
Initialize an AVAES context.
void av_aes_crypt(struct AVAES *a, uint8_t *dst, const uint8_t *src, int count, uint8_t *iv, int decrypt)
Encrypt or decrypt a buffer using a previously initialized context.