| 1 | /* |
| 2 | * Copyright (C) 2007 Michael Niedermayer <michaelni@gmx.at> |
| 3 | * |
| 4 | * This file is part of FFmpeg. |
| 5 | * |
| 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. |
| 10 | * |
| 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. |
| 15 | * |
| 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 |
| 19 | */ |
| 20 | |
| 21 | #ifndef AVUTIL_SHA_H |
| 22 | #define AVUTIL_SHA_H |
| 23 | |
| 24 | #include <stdint.h> |
| 25 | |
| 26 | #include "attributes.h" |
| 27 | #include "version.h" |
| 28 | |
| 29 | /** |
| 30 | * @defgroup lavu_sha SHA |
| 31 | * @ingroup lavu_crypto |
| 32 | * @{ |
| 33 | */ |
| 34 | |
| 35 | extern const int av_sha_size; |
| 36 | |
| 37 | struct AVSHA; |
| 38 | |
| 39 | /** |
| 40 | * Allocate an AVSHA context. |
| 41 | */ |
| 42 | struct AVSHA *av_sha_alloc(void); |
| 43 | |
| 44 | /** |
| 45 | * Initialize SHA-1 or SHA-2 hashing. |
| 46 | * |
| 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 |
| 50 | */ |
| 51 | int av_sha_init(struct AVSHA* context, int bits); |
| 52 | |
| 53 | /** |
| 54 | * Update hash value. |
| 55 | * |
| 56 | * @param context hash function context |
| 57 | * @param data input data to update hash with |
| 58 | * @param len input data length |
| 59 | */ |
| 60 | void av_sha_update(struct AVSHA* context, const uint8_t* data, unsigned int len); |
| 61 | |
| 62 | /** |
| 63 | * Finish hashing and output digest value. |
| 64 | * |
| 65 | * @param context hash function context |
| 66 | * @param digest buffer where output digest value is stored |
| 67 | */ |
| 68 | void av_sha_final(struct AVSHA* context, uint8_t *digest); |
| 69 | |
| 70 | /** |
| 71 | * @} |
| 72 | */ |
| 73 | |
| 74 | #endif /* AVUTIL_SHA_H */ |