1 /* 2 * Copyright (C) 2007 Michael Niedermayer <michaelni@gmx.at> 3 * Copyright (C) 2013 James Almer <jamrial@gmail.com> 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 /** 23 * @file 24 * @ingroup lavu_ripemd 25 * Public header for RIPEMD hash function implementation. 26 */ 27 28 #ifndef AVUTIL_RIPEMD_H 29 #define AVUTIL_RIPEMD_H 30 31 #include <stddef.h> 32 #include <stdint.h> 33 34 #include "attributes.h" 35 36 /** 37 * @defgroup lavu_ripemd RIPEMD 38 * @ingroup lavu_hash 39 * RIPEMD hash function implementation. 40 * 41 * @{ 42 */ 43 44 extern const int av_ripemd_size; 45 46 struct AVRIPEMD; 47 48 /** 49 * Allocate an AVRIPEMD context. 50 */ 51 struct AVRIPEMD *av_ripemd_alloc(void); 52 53 /** 54 * Initialize RIPEMD hashing. 55 * 56 * @param context pointer to the function context (of size av_ripemd_size) 57 * @param bits number of bits in digest (128, 160, 256 or 320 bits) 58 * @return zero if initialization succeeded, -1 otherwise 59 */ 60 int av_ripemd_init(struct AVRIPEMD* context, int bits); 61 62 /** 63 * Update hash value. 64 * 65 * @param context hash function context 66 * @param data input data to update hash with 67 * @param len input data length 68 */ 69 void av_ripemd_update(struct AVRIPEMD* context, const uint8_t* data, size_t len); 70 71 /** 72 * Finish hashing and output digest value. 73 * 74 * @param context hash function context 75 * @param digest buffer where output digest value is stored 76 */ 77 void av_ripemd_final(struct AVRIPEMD* context, uint8_t *digest); 78 79 /** 80 * @} 81 */ 82 83 #endif /* AVUTIL_RIPEMD_H */ 84