## ffmpeg / libavutil / des.h @ 4b2be143

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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 | ```
* This file is part of FFmpeg.
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6 | ```
*
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7 | ```
* FFmpeg is free software; you can redistribute it and/or
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8 | ```
* 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 | ```
* FFmpeg is distributed in the hope that it will be useful,
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13 | ```
* 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 | ```
* License along with FFmpeg; if not, write to the Free Software
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19 | ```
* 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 */ |