70f89937c16e3736f0108d16d6a3d7341d0b39c5
[libav.git] / libavutil / des.h
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 #ifndef FFMPEG_DES_H
23 #define FFMPEG_DES_H
24
25 #include <stdint.h>
26
27 /**
28 * \brief en- or decrypt an 64-bit block of data with DES
29 * \param in data to process.
30 * \param key key to use for en-/decryption.
31 * \param decrypt if 0 encrypt, else decrypt.
32 * \return processed data
33 *
34 * If your input data is in 8-bit blocks treat it as big-endian
35 * (use e.g. AV_RB64 and AV_WB64).
36 */
37 uint64_t ff_des_encdec(uint64_t in, uint64_t key, int decrypt);
38
39 #endif /* FFMPEG_DES_H */