ffmpeg.libavutil.blowfish source code

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 module ffmpeg.libavutil.blowfish;
23 
24 extern (C):
25 import ffmpeg; @nogc nothrow:
26 
27 /**
28  * @defgroup lavu_blowfish Blowfish
29  * @ingroup lavu_crypto
30  * @{
31  */
32 
33 enum AV_BF_ROUNDS = 16;
34 
35 struct AVBlowfish
36 {
37     uint[18] p;
38     uint[256][4] s;
39 }
40 
41 /**
42  * Allocate an AVBlowfish context.
43  */
44 AVBlowfish* av_blowfish_alloc ();
45 
46 /**
47  * Initialize an AVBlowfish context.
48  *
49  * @param ctx an AVBlowfish context
50  * @param key a key
51  * @param key_len length of the key
52  */
53 void av_blowfish_init (AVBlowfish* ctx, const(ubyte)* key, int key_len);
54 
55 /**
56  * Encrypt or decrypt a buffer using a previously initialized context.
57  *
58  * @param ctx an AVBlowfish context
59  * @param xl left four bytes halves of input to be encrypted
60  * @param xr right four bytes halves of input to be encrypted
61  * @param decrypt 0 for encryption, 1 for decryption
62  */
63 void av_blowfish_crypt_ecb (AVBlowfish* ctx, uint* xl, uint* xr, 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  */
75 void av_blowfish_crypt (
76     AVBlowfish* ctx,
77     ubyte* dst,
78     const(ubyte)* src,
79     int count,
80     ubyte* iv,
81     int decrypt);
82 
83 /**
84  * @}
85  */
86 
87 /* AVUTIL_BLOWFISH_H */