1 /*
2  * Copyright (C) 2007 Michael Niedermayer <michaelni@gmx.at>
3  * Copyright (C) 2013 James Almer <jamrial@gmail.com>
4  *
5  * This file is part of FFmpeg.
6  *
7  * FFmpeg is free software; you can redistribute it and/or
8  * modify it under the terms of the GNU Lesser General Public
9  * License as published by the Free Software Foundation; either
10  * version 2.1 of the License, or (at your option) any later version.
11  *
12  * FFmpeg is distributed in the hope that it will be useful,
13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
15  * Lesser General Public License for more details.
16  *
17  * You should have received a copy of the GNU Lesser General Public
18  * License along with FFmpeg; if not, write to the Free Software
19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20  */
21 
22 #ifndef AVUTIL_RIPEMD_H
23 #define AVUTIL_RIPEMD_H
24 
25 #include <stdint.h>
26 
27 #include "attributes.h"
28 #include "version.h"
29 
30 /**
31  * @defgroup lavu_ripemd RIPEMD
32  * @ingroup lavu_crypto
33  * @{
34  */
35 
36 extern const int av_ripemd_size;
37 
38 struct AVRIPEMD;
39 
40 /**
41  * Allocate an AVRIPEMD context.
42  */
43 struct AVRIPEMD *av_ripemd_alloc(void);
44 
45 /**
46  * Initialize RIPEMD hashing.
47  *
48  * @param context pointer to the function context (of size av_ripemd_size)
49  * @param bits    number of bits in digest (128, 160, 256 or 320 bits)
50  * @return        zero if initialization succeeded, -1 otherwise
51  */
52 int av_ripemd_init(struct AVRIPEMD* context, int bits);
53 
54 /**
55  * Update hash value.
56  *
57  * @param context hash function context
58  * @param data    input data to update hash with
59  * @param len     input data length
60  */
61 void av_ripemd_update(struct AVRIPEMD* context, const uint8_t* data, unsigned int len);
62 
63 /**
64  * Finish hashing and output digest value.
65  *
66  * @param context hash function context
67  * @param digest  buffer where output digest value is stored
68  */
69 void av_ripemd_final(struct AVRIPEMD* context, uint8_t *digest);
70 
71 /**
72  * @}
73  */
74 
75 #endif /* AVUTIL_RIPEMD_H */
76