1 /* 2 * A 32-bit implementation of the TEA algorithm 3 * Copyright (c) 2015 Vesselin Bontchev 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 module ffmpeg.libavutil.tea; 22 extern (C) @nogc nothrow: 23 24 /** 25 * @file 26 * @brief Public header for libavutil TEA algorithm 27 * @defgroup lavu_tea TEA 28 * @ingroup lavu_crypto 29 * @{ 30 */ 31 32 extern __gshared const int av_tea_size; 33 34 struct AVTEA; 35 36 /** 37 * Allocate an AVTEA context 38 * To free the struct: av_free(ptr) 39 */ 40 AVTEA* av_tea_alloc (); 41 42 /** 43 * Initialize an AVTEA context. 44 * 45 * @param ctx an AVTEA context 46 * @param key a key of 16 bytes used for encryption/decryption 47 * @param rounds the number of rounds in TEA (64 is the "standard") 48 */ 49 void av_tea_init (AVTEA* ctx, ref const(ubyte)[16] key, int rounds); 50 51 /** 52 * Encrypt or decrypt a buffer using a previously initialized context. 53 * 54 * @param ctx an AVTEA context 55 * @param dst destination array, can be equal to src 56 * @param src source array, can be equal to dst 57 * @param count number of 8 byte blocks 58 * @param iv initialization vector for CBC mode, if NULL then ECB will be used 59 * @param decrypt 0 for encryption, 1 for decryption 60 */ 61 void av_tea_crypt ( 62 AVTEA* ctx, 63 ubyte* dst, 64 const(ubyte)* src, 65 int count, 66 ubyte* iv, 67 int decrypt); 68 69 /** 70 * @} 71 */ 72 73 /* AVUTIL_TEA_H */