FFmpeg  1.2.4
blowfish.h
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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 
33 #define AV_BF_ROUNDS 16
34 
35 typedef struct AVBlowfish {
36  uint32_t p[AV_BF_ROUNDS + 2];
37  uint32_t s[4][256];
38 } AVBlowfish;
39 
47 void av_blowfish_init(struct AVBlowfish *ctx, const uint8_t *key, int key_len);
48 
57 void av_blowfish_crypt_ecb(struct AVBlowfish *ctx, uint32_t *xl, uint32_t *xr,
58  int decrypt);
59 
70 void av_blowfish_crypt(struct AVBlowfish *ctx, uint8_t *dst, const uint8_t *src,
71  int count, uint8_t *iv, int decrypt);
72 
77 #endif /* AVUTIL_BLOWFISH_H */