ffmpeg.libavutil.des source code

1 /*
2  * DES encryption/decryption
3  * Copyright (c) 2007 Reimar Doeffinger
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.des;
23 
24 extern (C):
25 import ffmpeg; @nogc nothrow:
26 
27 /**
28  * @defgroup lavu_des DES
29  * @ingroup lavu_crypto
30  * @{
31  */
32 
33 struct AVDES
34 {
35     ulong[16][3] round_keys;
36     int triple_des;
37 }
38 
39 /**
40  * Allocate an AVDES context.
41  */
42 AVDES* av_des_alloc ();
43 
44 /**
45  * @brief Initializes an AVDES context.
46  *
47  * @param key_bits must be 64 or 192
48  * @param decrypt 0 for encryption/CBC-MAC, 1 for decryption
49  * @return zero on success, negative value otherwise
50  */
51 int av_des_init (AVDES* d, const(ubyte)* key, int key_bits, int decrypt);
52 
53 /**
54  * @brief Encrypts / decrypts using the DES algorithm.
55  *
56  * @param count number of 8 byte blocks
57  * @param dst destination array, can be equal to src, must be 8-byte aligned
58  * @param src source array, can be equal to dst, must be 8-byte aligned, may be NULL
59  * @param iv initialization vector for CBC mode, if NULL then ECB will be used,
60  *           must be 8-byte aligned
61  * @param decrypt 0 for encryption, 1 for decryption
62  */
63 void av_des_crypt (AVDES* d, ubyte* dst, const(ubyte)* src, int count, ubyte* iv, int decrypt);
64 
65 /**
66  * @brief Calculates CBC-MAC using the DES algorithm.
67  *
68  * @param count number of 8 byte blocks
69  * @param dst destination array, can be equal to src, must be 8-byte aligned
70  * @param src source array, can be equal to dst, must be 8-byte aligned, may be NULL
71  */
72 void av_des_mac (AVDES* d, ubyte* dst, const(ubyte)* src, int count);
73 
74 /**
75  * @}
76  */
77 
78 /* AVUTIL_DES_H */