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 #include "common.h"
  27
  28 /**
  29  * \brief en- or decrypt an 64-bit block of data with DES
  30  * \param in data to process.
  31  * \param key key to use for en-/decryption.
  32  * \param decrypt if 0 encrypt, else decrypt.
  33  * \return processed data
  34  *
  35  * If your input data is in 8-bit blocks treat it as big-endian
  36  * (use e.g. AV_RB64 and AV_WB64).
  37  */
  38 uint64_t ff_des_encdec(uint64_t in, uint64_t key, int decrypt) av_const;
  39
  40 #endif /* FFMPEG_DES_H */