ffmpeg / libavutil / des.h @ 490a022d
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| 1 | 2e9ad69a | Reimar Döffinger | /*
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| 2 | * DES encryption/decryption
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| 3 | * Copyright (c) 2007 Reimar Doeffinger
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| 4 | *
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| 5 | 2912e87a | Mans Rullgard | * This file is part of Libav.
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| 6 | 2e9ad69a | Reimar Döffinger | *
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| 7 | 2912e87a | Mans Rullgard | * Libav is free software; you can redistribute it and/or
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| 8 | 2e9ad69a | Reimar Döffinger | * modify it under the terms of the GNU Lesser General Public
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| 9 | * License as published by the Free Software Foundation; either
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| 10 | * version 2.1 of the License, or (at your option) any later version.
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| 11 | *
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| 12 | 2912e87a | Mans Rullgard | * Libav is distributed in the hope that it will be useful,
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| 13 | 2e9ad69a | Reimar Döffinger | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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| 15 | * Lesser General Public License for more details.
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| 16 | *
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| 17 | * You should have received a copy of the GNU Lesser General Public
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| 18 | 2912e87a | Mans Rullgard | * License along with Libav; if not, write to the Free Software
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| 19 | 2e9ad69a | Reimar Döffinger | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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| 20 | */
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| 21 | |||
| 22 | 98790382 | Stefano Sabatini | #ifndef AVUTIL_DES_H
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| 23 | #define AVUTIL_DES_H
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| 24 | 2e9ad69a | Reimar Döffinger | |
| 25 | fe0c188b | Peter Ross | #include <stdint.h> |
| 26 | 1a534c7f | Reimar Döffinger | |
| 27 | struct AVDES {
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| 28 | uint64_t round_keys[3][16]; |
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| 29 | int triple_des;
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| 30 | }; |
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| 31 | |||
| 32 | /**
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| 33 | * \brief Initializes an AVDES context.
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| 34 | *
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| 35 | bc17cc01 | Reimar Döffinger | * \param key_bits must be 64 or 192
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| 36 | 1a534c7f | Reimar Döffinger | * \param decrypt 0 for encryption, 1 for decryption
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| 37 | */
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| 38 | int av_des_init(struct AVDES *d, const uint8_t *key, int key_bits, int decrypt); |
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| 39 | f0a838e5 | Diego Biurrun | |
| 40 | 46fb896b | Reimar Döffinger | /**
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| 41 | 1a534c7f | Reimar Döffinger | * \brief Encrypts / decrypts using the DES algorithm.
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| 42 | 46fb896b | Reimar Döffinger | *
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| 43 | 1a534c7f | Reimar Döffinger | * \param count number of 8 byte blocks
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| 44 | * \param dst destination array, can be equal to src, must be 8-byte aligned
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| 45 | * \param src source array, can be equal to dst, must be 8-byte aligned, may be NULL
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| 46 | * \param iv initialization vector for CBC mode, if NULL then ECB will be used,
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| 47 | * must be 8-byte aligned
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| 48 | * \param decrypt 0 for encryption, 1 for decryption
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| 49 | 46fb896b | Reimar Döffinger | */
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| 50 | 1a534c7f | Reimar Döffinger | 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 */ |