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/*
* DES encryption/decryption
* Copyright (c) 2007 Reimar Doeffinger
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef FFMPEG_DES_H
#define FFMPEG_DES_H
/**
* \brief en- or decrypt an 64-bit block of data with DES
* \param in data to process.
* \param key key to use for en-/decryption.
* \param decrypt if 0 encrypt, else decrypt.
* \return processed data
*
* If your input data is in 8-bit blocks treat it as big-endian
* (use e.g. AV_RB64 and AV_WB64).
*/
uint64_t ff_des_encdec(uint64_t in, uint64_t key, int decrypt);
#endif /* FFMPEG_DES_H */
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