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4349 | Serge | 1 | /* |
2 | * Copyright (C) 2007 Michael Niedermayer |
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3 | * |
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4 | * This file is part of FFmpeg. |
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5 | * |
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6 | * FFmpeg is free software; you can redistribute it and/or |
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7 | * modify it under the terms of the GNU Lesser General Public |
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8 | * License as published by the Free Software Foundation; either |
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9 | * version 2.1 of the License, or (at your option) any later version. |
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10 | * |
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11 | * FFmpeg is distributed in the hope that it will be useful, |
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12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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14 | * Lesser General Public License for more details. |
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15 | * |
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16 | * You should have received a copy of the GNU Lesser General Public |
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17 | * License along with FFmpeg; if not, write to the Free Software |
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18 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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19 | */ |
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20 | |||
21 | #ifndef AVUTIL_SHA_H |
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22 | #define AVUTIL_SHA_H |
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23 | |||
24 | #include |
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25 | |||
26 | #include "attributes.h" |
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27 | #include "version.h" |
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28 | |||
29 | /** |
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30 | * @defgroup lavu_sha SHA |
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31 | * @ingroup lavu_crypto |
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32 | * @{ |
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33 | */ |
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34 | |||
35 | extern const int av_sha_size; |
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36 | |||
37 | struct AVSHA; |
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38 | |||
39 | /** |
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40 | * Allocate an AVSHA context. |
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41 | */ |
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42 | struct AVSHA *av_sha_alloc(void); |
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43 | |||
44 | /** |
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45 | * Initialize SHA-1 or SHA-2 hashing. |
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46 | * |
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47 | * @param context pointer to the function context (of size av_sha_size) |
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48 | * @param bits number of bits in digest (SHA-1 - 160 bits, SHA-2 224 or 256 bits) |
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49 | * @return zero if initialization succeeded, -1 otherwise |
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50 | */ |
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51 | int av_sha_init(struct AVSHA* context, int bits); |
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52 | |||
53 | /** |
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54 | * Update hash value. |
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55 | * |
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56 | * @param context hash function context |
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57 | * @param data input data to update hash with |
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58 | * @param len input data length |
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59 | */ |
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60 | void av_sha_update(struct AVSHA* context, const uint8_t* data, unsigned int len); |
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61 | |||
62 | /** |
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63 | * Finish hashing and output digest value. |
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64 | * |
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65 | * @param context hash function context |
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66 | * @param digest buffer where output digest value is stored |
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67 | */ |
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68 | void av_sha_final(struct AVSHA* context, uint8_t *digest); |
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69 | |||
70 | /** |
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71 | * @} |
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72 | */ |
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73 | |||
74 | #endif /* AVUTIL_SHA_H */ |