| /* | |
| * Copyright (C) 2007 Michael Niedermayer <[email protected]> | |
| * | |
| * This file is part of FFmpeg. | |
| * | |
| * FFmpeg is free software; you can redistribute it and/or | |
| * modify it under the terms of the GNU Lesser General Public | |
| * License as published by the Free Software Foundation; either | |
| * version 2.1 of the License, or (at your option) any later version. | |
| * | |
| * FFmpeg is distributed in the hope that it will be useful, | |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| * Lesser General Public License for more details. | |
| * | |
| * You should have received a copy of the GNU Lesser General Public | |
| * License along with FFmpeg; if not, write to the Free Software | |
| * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | |
| */ | |
| /** | |
| * @file | |
| * @ingroup lavu_sha | |
| * Public header for SHA-1 & SHA-256 hash function implementations. | |
| */ | |
| /** | |
| * @defgroup lavu_sha SHA | |
| * @ingroup lavu_hash | |
| * SHA-1 and SHA-256 (Secure Hash Algorithm) hash function implementations. | |
| * | |
| * This module supports the following SHA hash functions: | |
| * | |
| * - SHA-1: 160 bits | |
| * - SHA-224: 224 bits, as a variant of SHA-2 | |
| * - SHA-256: 256 bits, as a variant of SHA-2 | |
| * | |
| * @see For SHA-384, SHA-512, and variants thereof, see @ref lavu_sha512. | |
| * | |
| * @{ | |
| */ | |
| extern const int av_sha_size; | |
| struct AVSHA; | |
| /** | |
| * Allocate an AVSHA context. | |
| */ | |
| struct AVSHA *av_sha_alloc(void); | |
| /** | |
| * Initialize SHA-1 or SHA-2 hashing. | |
| * | |
| * @param context pointer to the function context (of size av_sha_size) | |
| * @param bits number of bits in digest (SHA-1 - 160 bits, SHA-2 224 or 256 bits) | |
| * @return zero if initialization succeeded, -1 otherwise | |
| */ | |
| int av_sha_init(struct AVSHA* context, int bits); | |
| /** | |
| * Update hash value. | |
| * | |
| * @param ctx hash function context | |
| * @param data input data to update hash with | |
| * @param len input data length | |
| */ | |
| void av_sha_update(struct AVSHA *ctx, const uint8_t *data, size_t len); | |
| /** | |
| * Finish hashing and output digest value. | |
| * | |
| * @param context hash function context | |
| * @param digest buffer where output digest value is stored | |
| */ | |
| void av_sha_final(struct AVSHA* context, uint8_t *digest); | |
| /** | |
| * @} | |
| */ | |