1/* 2 * Copyright (C) 2007 Michael Niedermayer <michaelni@gmx.at> 3 * 4 * This file is part of FFmpeg. 5 * 6 * FFmpeg is free software; you can redistribute it and/or 7 * modify it under the terms of the GNU Lesser General Public 8 * License as published by the Free Software Foundation; either 9 * version 2.1 of the License, or (at your option) any later version. 10 * 11 * FFmpeg is distributed in the hope that it will be useful, 12 * but WITHOUT ANY WARRANTY; without even the implied warranty of 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 14 * Lesser General Public License for more details. 15 * 16 * You should have received a copy of the GNU Lesser General Public 17 * License along with FFmpeg; if not, write to the Free Software 18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 19 */ 20 21#ifndef AVUTIL_SHA_H 22#define AVUTIL_SHA_H 23 24#include <stdint.h> 25 26extern const int av_sha_size; 27 28struct AVSHA; 29 30/** 31 * Initializes SHA-1 or SHA-2 hashing. 32 * 33 * @param context pointer to the function context (of size av_sha_size) 34 * @param bits number of bits in digest (SHA-1 - 160 bits, SHA-2 224 or 256 bits) 35 * @return zero if initialization succeeded, -1 otherwise 36 */ 37int av_sha_init(struct AVSHA* context, int bits); 38 39/** 40 * Updates hash value. 41 * 42 * @param context hash function context 43 * @param data input data to update hash with 44 * @param len input data length 45 */ 46void av_sha_update(struct AVSHA* context, const uint8_t* data, unsigned int len); 47 48/** 49 * Finishes hashing and output digest value. 50 * 51 * @param context hash function context 52 * @param digest buffer where output digest value is stored 53 */ 54void av_sha_final(struct AVSHA* context, uint8_t *digest); 55 56#endif /* AVUTIL_SHA_H */ 57