1 /*
2 * Blowfish 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_BLOWFISH_H
23 #define AVUTIL_BLOWFISH_H
24
25 #include <stdint.h>
26
27 /**
28 * @defgroup lavu_blowfish Blowfish
29 * @ingroup lavu_crypto
30 * @{
31 */
32
33 #define AV_BF_ROUNDS 16
34
39
40 /**
41 * Allocate an AVBlowfish context.
42 */
44
45 /**
46 * Initialize an AVBlowfish context.
47 *
48 * @param ctx an AVBlowfish context
49 * @param key a key
50 * @param key_len length of the key
51 */
53
54 /**
55 * Encrypt or decrypt a buffer using a previously initialized context.
56 *
57 * @param ctx an AVBlowfish context
58 * @param xl left four bytes halves of input to be encrypted
59 * @param xr right four bytes halves of input to be encrypted
60 * @param decrypt 0 for encryption, 1 for decryption
61 */
63 int decrypt);
64
65 /**
66 * Encrypt or decrypt a buffer using a previously initialized context.
67 *
68 * @param ctx an AVBlowfish context
69 * @param dst destination array, can be equal to src
70 * @param src source array, can be equal to dst
71 * @param count number of 8 byte blocks
72 * @param iv initialization vector for CBC mode, if NULL ECB will be used
73 * @param decrypt 0 for encryption, 1 for decryption
74 */
76 int count, uint8_t *iv, int decrypt);
77
78 /**
79 * @}
80 */
81
82 #endif /* AVUTIL_BLOWFISH_H */