sha.h (1818B)
1 /* 2 * Copyright (C) 2007 Michael Niedermayer <michaelni@gmx.at> 3 * 4 * This file is part of Libav. 5 * 6 * Libav 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 * Libav 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 Libav; 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 26 /** 27 * @defgroup lavu_sha SHA 28 * @ingroup lavu_crypto 29 * @{ 30 */ 31 32 extern const int av_sha_size; 33 34 struct AVSHA; 35 36 /** 37 * Initialize SHA-1 or SHA-2 hashing. 38 * 39 * @param context pointer to the function context (of size av_sha_size) 40 * @param bits number of bits in digest (SHA-1 - 160 bits, SHA-2 224 or 256 bits) 41 * @return zero if initialization succeeded, -1 otherwise 42 */ 43 int av_sha_init(struct AVSHA* context, int bits); 44 45 /** 46 * Update hash value. 47 * 48 * @param context hash function context 49 * @param data input data to update hash with 50 * @param len input data length 51 */ 52 void av_sha_update(struct AVSHA* context, const uint8_t* data, unsigned int len); 53 54 /** 55 * Finish hashing and output digest value. 56 * 57 * @param context hash function context 58 * @param digest buffer where output digest value is stored 59 */ 60 void av_sha_final(struct AVSHA* context, uint8_t *digest); 61 62 /** 63 * @} 64 */ 65 66 #endif /* AVUTIL_SHA_H */