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ffmpeg / libavutil / des.h @ 80a07f6e

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1 2e9ad69a Reimar Döffinger
/*
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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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22 98790382 Stefano Sabatini
#ifndef AVUTIL_DES_H
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#define AVUTIL_DES_H
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25 fe0c188b Peter Ross
#include <stdint.h>
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struct AVDES {
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    uint64_t round_keys[3][16];
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    int triple_des;
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};
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/**
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 * \brief Initializes an AVDES context.
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 *
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 * \param key_bits must be 64 or 192
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 * \param decrypt 0 for encryption, 1 for decryption
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 */
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int av_des_init(struct AVDES *d, const uint8_t *key, int key_bits, int decrypt);
39 f0a838e5 Diego Biurrun
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/**
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 * \brief Encrypts / decrypts using the DES algorithm.
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 *
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 * \param count number of 8 byte blocks
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 * \param dst destination array, can be equal to src, must be 8-byte aligned
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 * \param src source array, can be equal to dst, must be 8-byte aligned, may be NULL
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 * \param iv initialization vector for CBC mode, if NULL then ECB will be used,
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 *           must be 8-byte aligned
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 * \param decrypt 0 for encryption, 1 for decryption
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 */
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void av_des_crypt(struct AVDES *d, uint8_t *dst, const uint8_t *src, int count, uint8_t *iv, int decrypt);
51 2e9ad69a Reimar Döffinger
52 98790382 Stefano Sabatini
#endif /* AVUTIL_DES_H */