2 * Copyright (C) 2007 Michael Niedermayer <michaelni@gmx.at>
4 * This file is part of FFmpeg.
6 * FFmpeg is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
11 * FFmpeg is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with FFmpeg; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
26 #include "attributes.h"
30 * @defgroup lavu_sha SHA
31 * @ingroup lavu_crypto
35 extern const int av_sha_size;
40 * Allocate an AVSHA context.
42 struct AVSHA *av_sha_alloc(void);
45 * Initialize SHA-1 or SHA-2 hashing.
47 * @param context pointer to the function context (of size av_sha_size)
48 * @param bits number of bits in digest (SHA-1 - 160 bits, SHA-2 224 or 256 bits)
49 * @return zero if initialization succeeded, -1 otherwise
51 int av_sha_init(struct AVSHA* context, int bits);
56 * @param context hash function context
57 * @param data input data to update hash with
58 * @param len input data length
60 void av_sha_update(struct AVSHA* context, const uint8_t* data, unsigned int len);
63 * Finish hashing and output digest value.
65 * @param context hash function context
66 * @param digest buffer where output digest value is stored
68 void av_sha_final(struct AVSHA* context, uint8_t *digest);
74 #endif /* AVUTIL_SHA_H */