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nettle/md5.h
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1 /* md5.h
2  *
3  * The MD5 hash function, described in RFC 1321.
4  */
5 
6 /* nettle, low-level cryptographics library
7  *
8  * Copyright (C) 2001 Niels Möller
9  *
10  * The nettle library is free software; you can redistribute it and/or modify
11  * it under the terms of the GNU Lesser General Public License as published by
12  * the Free Software Foundation; either version 2.1 of the License, or (at your
13  * option) any later version.
14  *
15  * The nettle library is distributed in the hope that it will be useful, but
16  * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
17  * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
18  * License for more details.
19  *
20  * You should have received a copy of the GNU Lesser General Public License
21  * along with the nettle library; see the file COPYING.LIB. If not, write to
22  * the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
23  * MA 02111-1307, USA.
24  */
25 
26 #ifndef NETTLE_MD5_H_INCLUDED
27 #define NETTLE_MD5_H_INCLUDED
28 
29 #include "nettle-types.h"
30 
31 /* Name mangling */
32 #define md5_init nettle_md5_init
33 #define md5_update nettle_md5_update
34 #define md5_digest nettle_md5_digest
35 
36 #define MD5_DIGEST_SIZE 16
37 #define MD5_DATA_SIZE 64
38 
39 /* Digest is kept internally as 4 32-bit words. */
40 #define _MD5_DIGEST_LENGTH 4
41 
42 struct md5_ctx
43 {
45  uint32_t count_l, count_h; /* Block count */
46  uint8_t block[MD5_DATA_SIZE]; /* Block buffer */
47  unsigned index; /* Into buffer */
48 };
49 
50 void
51 md5_init(struct md5_ctx *ctx);
52 
53 void
54 md5_update(struct md5_ctx *ctx,
55  unsigned length,
56  const uint8_t *data);
57 
58 void
59 md5_digest(struct md5_ctx *ctx,
60  unsigned length,
61  uint8_t *digest);
62 
63 #endif /* NETTLE_MD5_H_INCLUDED */
64