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