From 150c9823e71a161e97003849cf8b2f55b21520bd Mon Sep 17 00:00:00 2001 From: Tim Redfern Date: Mon, 26 Aug 2013 15:10:18 +0100 Subject: adding ffmpeg specific version --- ffmpeg1/libavutil/des.h | 61 +++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 61 insertions(+) create mode 100644 ffmpeg1/libavutil/des.h (limited to 'ffmpeg1/libavutil/des.h') diff --git a/ffmpeg1/libavutil/des.h b/ffmpeg1/libavutil/des.h new file mode 100644 index 0000000..2feb046 --- /dev/null +++ b/ffmpeg1/libavutil/des.h @@ -0,0 +1,61 @@ +/* + * 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 + +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/CBC-MAC, 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); + +/** + * @brief Calculates CBC-MAC 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 + */ +void av_des_mac(struct AVDES *d, uint8_t *dst, const uint8_t *src, int count); + +#endif /* AVUTIL_DES_H */ -- cgit v1.2.3