From bedd6906eabdd513042d6a178d4dc56a3a41d1d3 Mon Sep 17 00:00:00 2001 From: Fox Caminiti Date: Fri, 16 Dec 2022 20:16:43 -0500 Subject: v3, file/build organization --- dependencies/include/libavutil/twofish.h | 70 ++++++++++++++++++++++++++++++++ 1 file changed, 70 insertions(+) create mode 100644 dependencies/include/libavutil/twofish.h (limited to 'dependencies/include/libavutil/twofish.h') diff --git a/dependencies/include/libavutil/twofish.h b/dependencies/include/libavutil/twofish.h new file mode 100644 index 0000000..67f359e --- /dev/null +++ b/dependencies/include/libavutil/twofish.h @@ -0,0 +1,70 @@ +/* + * An implementation of the TwoFish algorithm + * Copyright (c) 2015 Supraja Meedinti + * + * 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_TWOFISH_H +#define AVUTIL_TWOFISH_H + +#include + + +/** + * @file + * @brief Public header for libavutil TWOFISH algorithm + * @defgroup lavu_twofish TWOFISH + * @ingroup lavu_crypto + * @{ + */ + +extern const int av_twofish_size; + +struct AVTWOFISH; + +/** + * Allocate an AVTWOFISH context + * To free the struct: av_free(ptr) + */ +struct AVTWOFISH *av_twofish_alloc(void); + +/** + * Initialize an AVTWOFISH context. + * + * @param ctx an AVTWOFISH context + * @param key a key of size ranging from 1 to 32 bytes used for encryption/decryption + * @param key_bits number of keybits: 128, 192, 256 If less than the required, padded with zeroes to nearest valid value; return value is 0 if key_bits is 128/192/256, -1 if less than 0, 1 otherwise + */ +int av_twofish_init(struct AVTWOFISH *ctx, const uint8_t *key, int key_bits); + +/** + * Encrypt or decrypt a buffer using a previously initialized context + * + * @param ctx an AVTWOFISH context + * @param dst destination array, can be equal to src + * @param src source array, can be equal to dst + * @param count number of 16 byte blocks + * @param iv initialization vector for CBC mode, NULL for ECB mode + * @param decrypt 0 for encryption, 1 for decryption + */ +void av_twofish_crypt(struct AVTWOFISH *ctx, uint8_t *dst, const uint8_t *src, int count, uint8_t* iv, int decrypt); + +/** + * @} + */ +#endif /* AVUTIL_TWOFISH_H */ -- cgit v1.2.3