sha.h (1989B)
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 #include "attributes.h" 27 #include "version.h" 28 29 /** 30 * @defgroup lavu_sha SHA 31 * @ingroup lavu_crypto 32 * @{ 33 */ 34 35 #if FF_API_CONTEXT_SIZE 36 extern attribute_deprecated const int av_sha_size; 37 #endif 38 39 struct AVSHA; 40 41 /** 42 * Allocate an AVSHA context. 43 */ 44 struct AVSHA *av_sha_alloc(void); 45 46 /** 47 * Initialize SHA-1 or SHA-2 hashing. 48 * 49 * @param context pointer to the function context (of size av_sha_size) 50 * @param bits number of bits in digest (SHA-1 - 160 bits, SHA-2 224 or 256 bits) 51 * @return zero if initialization succeeded, -1 otherwise 52 */ 53 int av_sha_init(struct AVSHA* context, int bits); 54 55 /** 56 * Update hash value. 57 * 58 * @param context hash function context 59 * @param data input data to update hash with 60 * @param len input data length 61 */ 62 void av_sha_update(struct AVSHA* context, const uint8_t* data, unsigned int len); 63 64 /** 65 * Finish hashing and output digest value. 66 * 67 * @param context hash function context 68 * @param digest buffer where output digest value is stored 69 */ 70 void av_sha_final(struct AVSHA* context, uint8_t *digest); 71 72 /** 73 * @} 74 */ 75 76 #endif /* AVUTIL_SHA_H */