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52 lines
1.7 KiB
52 lines
1.7 KiB
/* |
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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 AVUTIL_DES_H |
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#define AVUTIL_DES_H |
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#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); |
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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); |
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#endif /* AVUTIL_DES_H */
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