1 /*
2  * copyright (c) 2006 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_MD5_H
22 #define AVUTIL_MD5_H
23 
24 #include <stdint.h>
25 
26 #include "attributes.h"
27 #include "version.h"
28 
29 /**
30  * @defgroup lavu_md5 MD5
31  * @ingroup lavu_crypto
32  * @{
33  */
34 
35 extern const int av_md5_size;
36 
37 struct AVMD5;
38 
39 /**
40  * Allocate an AVMD5 context.
41  */
42 struct AVMD5 *av_md5_alloc(void);
43 
44 /**
45  * Initialize MD5 hashing.
46  *
47  * @param ctx pointer to the function context (of size av_md5_size)
48  */
49 void av_md5_init(struct AVMD5 *ctx);
50 
51 /**
52  * Update hash value.
53  *
54  * @param ctx hash function context
55  * @param src input data to update hash with
56  * @param len input data length
57  */
58 void av_md5_update(struct AVMD5 *ctx, const uint8_t *src, int len);
59 
60 /**
61  * Finish hashing and output digest value.
62  *
63  * @param ctx hash function context
64  * @param dst buffer where output digest value is stored
65  */
66 void av_md5_final(struct AVMD5 *ctx, uint8_t *dst);
67 
68 /**
69  * Hash an array of data.
70  *
71  * @param dst The output buffer to write the digest into
72  * @param src The data to hash
73  * @param len The length of the data, in bytes
74  */
75 void av_md5_sum(uint8_t *dst, const uint8_t *src, const int len);
76 
77 /**
78  * @}
79  */
80 
81 #endif /* AVUTIL_MD5_H */
82