1 /* 2 * An implementation of the TwoFish algorithm 3 * Copyright (c) 2015 Supraja Meedinti 4 * 5 * This file is part of FFmpeg. 6 * 7 * FFmpeg is free software; you can redistribute it and/or 8 * modify it under the terms of the GNU Lesser General Public 9 * License as published by the Free Software Foundation; either 10 * version 2.1 of the License, or (at your option) any later version. 11 * 12 * FFmpeg is distributed in the hope that it will be useful, 13 * but WITHOUT ANY WARRANTY; without even the implied warranty of 14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 15 * Lesser General Public License for more details. 16 * 17 * You should have received a copy of the GNU Lesser General Public 18 * License along with FFmpeg; if not, write to the Free Software 19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 20 */ 21 22 module ffmpeg.libavutil.twofish; 23 24 extern (C): 25 import ffmpeg; @nogc nothrow: 26 27 /** 28 * @file 29 * @brief Public header for libavutil TWOFISH algorithm 30 * @defgroup lavu_twofish TWOFISH 31 * @ingroup lavu_crypto 32 * @{ 33 */ 34 35 extern __gshared const int av_twofish_size; 36 37 struct AVTWOFISH; 38 39 /** 40 * Allocate an AVTWOFISH context 41 * To free the struct: av_free(ptr) 42 */ 43 AVTWOFISH* av_twofish_alloc (); 44 45 /** 46 * Initialize an AVTWOFISH context. 47 * 48 * @param ctx an AVTWOFISH context 49 * @param key a key of size ranging from 1 to 32 bytes used for encryption/decryption 50 * @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 51 */ 52 int av_twofish_init (AVTWOFISH* ctx, const(ubyte)* key, int key_bits); 53 54 /** 55 * Encrypt or decrypt a buffer using a previously initialized context 56 * 57 * @param ctx an AVTWOFISH context 58 * @param dst destination array, can be equal to src 59 * @param src source array, can be equal to dst 60 * @param count number of 16 byte blocks 61 * @paran iv initialization vector for CBC mode, NULL for ECB mode 62 * @param decrypt 0 for encryption, 1 for decryption 63 */ 64 void av_twofish_crypt (AVTWOFISH* ctx, ubyte* dst, const(ubyte)* src, int count, ubyte* iv, int decrypt); 65 66 /** 67 * @} 68 */ 69 /* AVUTIL_TWOFISH_H */