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