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/* * 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 */ #ifndef AVUTIL_SHA_H #define AVUTIL_SHA_H #include <stdint.h> #include "attributes.h" #include "version.h" /** * @defgroup lavu_sha SHA * @ingroup lavu_crypto * @{ */ 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 context hash function context * @param data input data to update hash with * @param len input data length */ void av_sha_update(struct AVSHA* context, const uint8_t* data, unsigned int 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); /** * @} */ #endif /* AVUTIL_SHA_H */