1 | /* md5.h |
2 | |
3 | The MD5 hash function, described in RFC 1321. |
4 | |
5 | Copyright (C) 2001 Niels Möller |
6 | |
7 | This file is part of GNU Nettle. |
8 | |
9 | GNU Nettle is free software: you can redistribute it and/or |
10 | modify it under the terms of either: |
11 | |
12 | * the GNU Lesser General Public License as published by the Free |
13 | Software Foundation; either version 3 of the License, or (at your |
14 | option) any later version. |
15 | |
16 | or |
17 | |
18 | * the GNU General Public License as published by the Free |
19 | Software Foundation; either version 2 of the License, or (at your |
20 | option) any later version. |
21 | |
22 | or both in parallel, as here. |
23 | |
24 | GNU Nettle is distributed in the hope that it will be useful, |
25 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
26 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
27 | General Public License for more details. |
28 | |
29 | You should have received copies of the GNU General Public License and |
30 | the GNU Lesser General Public License along with this program. If |
31 | not, see http://www.gnu.org/licenses/. |
32 | */ |
33 | |
34 | #ifndef NETTLE_MD5_H_INCLUDED |
35 | #define NETTLE_MD5_H_INCLUDED |
36 | |
37 | #include "nettle-types.h" |
38 | |
39 | #ifdef __cplusplus |
40 | extern "C" { |
41 | #endif |
42 | |
43 | /* Name mangling */ |
44 | #define md5_init nettle_md5_init |
45 | #define md5_update nettle_md5_update |
46 | #define md5_digest nettle_md5_digest |
47 | |
48 | #define MD5_DIGEST_SIZE 16 |
49 | #define MD5_BLOCK_SIZE 64 |
50 | /* For backwards compatibility */ |
51 | #define MD5_DATA_SIZE MD5_BLOCK_SIZE |
52 | |
53 | /* Digest is kept internally as 4 32-bit words. */ |
54 | #define _MD5_DIGEST_LENGTH 4 |
55 | |
56 | struct md5_ctx |
57 | { |
58 | uint32_t state[_MD5_DIGEST_LENGTH]; |
59 | uint64_t count; /* Block count */ |
60 | uint8_t block[MD5_BLOCK_SIZE]; /* Block buffer */ |
61 | unsigned index; /* Into buffer */ |
62 | }; |
63 | |
64 | void |
65 | md5_init(struct md5_ctx *ctx); |
66 | |
67 | void |
68 | md5_update(struct md5_ctx *ctx, |
69 | size_t length, |
70 | const uint8_t *data); |
71 | |
72 | void |
73 | md5_digest(struct md5_ctx *ctx, |
74 | size_t length, |
75 | uint8_t *digest); |
76 | |
77 | /* Internal compression function. STATE points to 4 uint32_t words, |
78 | and DATA points to 64 bytes of input data, possibly unaligned. */ |
79 | void |
80 | _nettle_md5_compress(uint32_t *state, const uint8_t *data); |
81 | |
82 | #ifdef __cplusplus |
83 | } |
84 | #endif |
85 | |
86 | #endif /* NETTLE_MD5_H_INCLUDED */ |
87 | |