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_sha512 25 * Public header for SHA-512 implementation. 26 */ 27 28 #ifndef AVUTIL_SHA512_H 29 #define AVUTIL_SHA512_H 30 31 #include <stddef.h> 32 #include <stdint.h> 33 34 #include "attributes.h" 35 36 /** 37 * @defgroup lavu_sha512 SHA-512 38 * @ingroup lavu_hash 39 * SHA-512 (Secure Hash Algorithm) hash function implementations. 40 * 41 * This module supports the following SHA-2 hash functions: 42 * 43 * - SHA-512/224: 224 bits 44 * - SHA-512/256: 256 bits 45 * - SHA-384: 384 bits 46 * - SHA-512: 512 bits 47 * 48 * @see For SHA-1, SHA-256, and variants thereof, see @ref lavu_sha. 49 * 50 * @{ 51 */ 52 53 extern const int av_sha512_size; 54 55 struct AVSHA512; 56 57 /** 58 * Allocate an AVSHA512 context. 59 */ 60 struct AVSHA512 *av_sha512_alloc(void); 61 62 /** 63 * Initialize SHA-2 512 hashing. 64 * 65 * @param context pointer to the function context (of size av_sha512_size) 66 * @param bits number of bits in digest (224, 256, 384 or 512 bits) 67 * @return zero if initialization succeeded, -1 otherwise 68 */ 69 int av_sha512_init(struct AVSHA512* context, int bits); 70 71 /** 72 * Update hash value. 73 * 74 * @param context hash function context 75 * @param data input data to update hash with 76 * @param len input data length 77 */ 78 void av_sha512_update(struct AVSHA512* context, const uint8_t* data, size_t len); 79 80 /** 81 * Finish hashing and output digest value. 82 * 83 * @param context hash function context 84 * @param digest buffer where output digest value is stored 85 */ 86 void av_sha512_final(struct AVSHA512* context, uint8_t *digest); 87 88 /** 89 * @} 90 */ 91 92 #endif /* AVUTIL_SHA512_H */ 93