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ffmpeg / libavutil / sha.h @ 80a07f6e

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1 451ae257 Kostya Shishkov
/*
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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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#ifndef AVUTIL_SHA_H
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#define AVUTIL_SHA_H
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#include <stdint.h>
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extern const int av_sha_size;
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struct AVSHA;
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/**
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 * Initializes 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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 * Updates hash value.
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 *
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 * @param context 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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void av_sha_update(struct AVSHA* context, const uint8_t* data, unsigned int len);
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/**
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 * Finishes 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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#endif /* AVUTIL_SHA_H */