FFmpeg
2.8.6
Main Page
Related Pages
Modules
Data Structures
Files
Examples
File List
Globals
libavutil
xtea.h
Go to the documentation of this file.
1
/*
2
* A 32-bit implementation of the XTEA algorithm
3
* Copyright (c) 2012 Samuel Pitoiset
4
*
5
* This file is part of FFmpeg.
6
*
7
* FFmpeg is free software; you can redistribute it and/or
8
* modify it under the terms of the GNU Lesser General Public
9
* License as published by the Free Software Foundation; either
10
* version 2.1 of the License, or (at your option) any later version.
11
*
12
* FFmpeg is distributed in the hope that it will be useful,
13
* but WITHOUT ANY WARRANTY; without even the implied warranty of
14
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15
* Lesser General Public License for more details.
16
*
17
* You should have received a copy of the GNU Lesser General Public
18
* License along with FFmpeg; if not, write to the Free Software
19
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20
*/
21
22
#ifndef AVUTIL_XTEA_H
23
#define AVUTIL_XTEA_H
24
25
#include <stdint.h>
26
#include "
version.h
"
27
28
/**
29
* @file
30
* @brief Public header for libavutil XTEA algorithm
31
* @defgroup lavu_xtea XTEA
32
* @ingroup lavu_crypto
33
* @{
34
*/
35
36
typedef
struct
AVXTEA
{
37
uint32_t
key
[16];
38
}
AVXTEA
;
39
40
/**
41
* Allocate an AVXTEA context.
42
*/
43
AVXTEA
*
av_xtea_alloc
(
void
);
44
45
/**
46
* Initialize an AVXTEA context.
47
*
48
* @param ctx an AVXTEA context
49
* @param key a key of 16 bytes used for encryption/decryption
50
*/
51
void
av_xtea_init
(
struct
AVXTEA
*ctx,
const
uint8_t
key
[16]);
52
53
/**
54
* Encrypt or decrypt a buffer using a previously initialized context.
55
*
56
* @param ctx an AVXTEA context
57
* @param dst destination array, can be equal to src
58
* @param src source array, can be equal to dst
59
* @param count number of 8 byte blocks
60
* @param iv initialization vector for CBC mode, if NULL then ECB will be used
61
* @param decrypt 0 for encryption, 1 for decryption
62
*/
63
void
av_xtea_crypt
(
struct
AVXTEA
*ctx, uint8_t *dst,
const
uint8_t *src,
64
int
count, uint8_t *iv,
int
decrypt);
65
66
/**
67
* @}
68
*/
69
70
#endif
/* AVUTIL_XTEA_H */
AVXTEA::key
uint32_t key[16]
Definition:
xtea.h:37
av_xtea_crypt
void av_xtea_crypt(struct AVXTEA *ctx, uint8_t *dst, const uint8_t *src, int count, uint8_t *iv, int decrypt)
Encrypt or decrypt a buffer using a previously initialized context.
av_xtea_init
void av_xtea_init(struct AVXTEA *ctx, const uint8_t key[16])
Initialize an AVXTEA context.
version.h
Libavutil version macros.
AVXTEA
Definition:
xtea.h:36
av_xtea_alloc
AVXTEA * av_xtea_alloc(void)
Allocate an AVXTEA context.
Generated by
1.8.11