FFmpeg
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 
34 extern const int av_aes_size;
35 
36 struct AVAES;
37 
38 /**
39  * Allocate an AVAES context.
40  */
41 struct 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  */
48 int 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  */
58 void 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 */
av_aes_init
int av_aes_init(struct AVAES *a, const uint8_t *key, int key_bits, int decrypt)
Initialize an AVAES context.
Definition: aes.c:195
av_aes_size
const int av_aes_size
Definition: aes.c:29
key
const char * key
Definition: hwcontext_opencl.c:168
av_aes_crypt
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.
Definition: aes.c:163
av_aes_alloc
struct AVAES * av_aes_alloc(void)
Allocate an AVAES context.
Definition: aes.c:31
a
The reader does not expect b to be semantically here and if the code is changed by maybe adding a a division or other the signedness will almost certainly be mistaken To avoid this confusion a new type was SUINT is the C unsigned type but it holds a signed int to use the same example SUINT a
Definition: undefined.txt:41
attributes.h
AVAES
Definition: aes_internal.h:34
src
INIT_CLIP pixel * src
Definition: h264pred_template.c:418