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 module ffmpeg.libavutil.blowfish;
22 
23 extern (C) @nogc nothrow:
24 
25 /**
26  * @defgroup lavu_blowfish Blowfish
27  * @ingroup lavu_crypto
28  * @{
29  */
30 
31 enum AV_BF_ROUNDS = 16;
32 
33 struct AVBlowfish
34 {
35     uint[18] p;
36     uint[256][4] s;
37 }
38 
39 /**
40  * Allocate an AVBlowfish context.
41  */
42 AVBlowfish* av_blowfish_alloc ();
43 
44 /**
45  * Initialize an AVBlowfish context.
46  *
47  * @param ctx an AVBlowfish context
48  * @param key a key
49  * @param key_len length of the key
50  */
51 void av_blowfish_init (AVBlowfish* ctx, const(ubyte)* key, int key_len);
52 
53 /**
54  * Encrypt or decrypt a buffer using a previously initialized context.
55  *
56  * @param ctx an AVBlowfish context
57  * @param xl left four bytes halves of input to be encrypted
58  * @param xr right four bytes halves of input to be encrypted
59  * @param decrypt 0 for encryption, 1 for decryption
60  */
61 void av_blowfish_crypt_ecb (AVBlowfish* ctx, uint* xl, uint* xr, int decrypt);
62 
63 /**
64  * Encrypt or decrypt a buffer using a previously initialized context.
65  *
66  * @param ctx an AVBlowfish context
67  * @param dst destination array, can be equal to src
68  * @param src source array, can be equal to dst
69  * @param count number of 8 byte blocks
70  * @param iv initialization vector for CBC mode, if NULL ECB will be used
71  * @param decrypt 0 for encryption, 1 for decryption
72  */
73 void av_blowfish_crypt (
74     AVBlowfish* ctx,
75     ubyte* dst,
76     const(ubyte)* src,
77     int count,
78     ubyte* iv,
79     int decrypt);
80 
81 /**
82  * @}
83  */
84 
85 /* AVUTIL_BLOWFISH_H */