1 /* 2 * Copyright (C) 2007 Michael Niedermayer <michaelni (at) gmx.at> 3 * Copyright (C) 2013 James Almer <jamrial (at) 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 #ifndef AVUTIL_SHA512_H 23 #define AVUTIL_SHA512_H 24 25 #include <stdint.h> 26 27 #include "attributes.h" 28 #include "version.h" 29 30 /** 31 * @defgroup lavu_sha512 SHA512 32 * @ingroup lavu_crypto 33 * @{ 34 */ 35 36 extern const int av_sha512_size; 37 38 struct AVSHA512; 39 40 /** 41 * Allocate an AVSHA512 context. 42 */ 43 struct AVSHA512 *av_sha512_alloc(void); 44 45 /** 46 * Initialize SHA-2 512 hashing. 47 * 48 * @param context pointer to the function context (of size av_sha512_size) 49 * @param bits number of bits in digest (224, 256, 384 or 512 bits) 50 * @return zero if initialization succeeded, -1 otherwise 51 */ 52 int av_sha512_init(struct AVSHA512* context, int bits); 53 54 /** 55 * Update hash value. 56 * 57 * @param context hash function context 58 * @param data input data to update hash with 59 * @param len input data length 60 */ 61 void av_sha512_update(struct AVSHA512* context, const uint8_t* data, unsigned int len); 62 63 /** 64 * Finish hashing and output digest value. 65 * 66 * @param context hash function context 67 * @param digest buffer where output digest value is stored 68 */ 69 void av_sha512_final(struct AVSHA512* context, uint8_t *digest); 70 71 /** 72 * @} 73 */ 74 75 #endif /* AVUTIL_SHA512_H */ 76
