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