c4f2d992 |
1 | /* -*-c-*- |
2 | * |
3 | * $Id: md5.h,v 1.1 1997/07/21 13:47:47 mdw Exp $ |
4 | * |
5 | * MD-5 secure hash routines |
6 | * Based on RSA MD-5 code |
7 | * |
8 | * (c) 1996, 1997 Mark Wooding |
9 | */ |
10 | |
11 | /*----- Licencing notice --------------------------------------------------* |
12 | * |
13 | * This file is part of `become' |
14 | * |
15 | * `Become' is free software; you can redistribute it and/or modify |
16 | * it under the terms of the GNU General Public License as published by |
17 | * the Free Software Foundation; either version 2 of the License, or |
18 | * (at your option) any later version. |
19 | * |
20 | * `Become' is distributed in the hope that it will be useful, |
21 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
22 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
23 | * GNU General Public License for more details. |
24 | * |
25 | * You should have received a copy of the GNU General Public License |
26 | * along with `become'; if not, write to the Free Software |
27 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
28 | */ |
29 | |
30 | /*----- Revision history --------------------------------------------------* |
31 | * |
32 | * $Log: md5.h,v $ |
33 | * Revision 1.1 1997/07/21 13:47:47 mdw |
34 | * Initial revision |
35 | * |
36 | */ |
37 | |
38 | #ifndef MD5_H |
39 | #define MD5_H |
40 | |
41 | #ifdef __cplusplus |
42 | extern "C" { |
43 | #endif |
44 | |
45 | /*----- Required headers --------------------------------------------------*/ |
46 | |
47 | #include <stddef.h> |
48 | |
49 | #ifndef CONFIG_H |
50 | # include "config.h" |
51 | #endif |
52 | |
53 | /*----- Useful constants --------------------------------------------------*/ |
54 | |
55 | #define MD5_HASHSIZE (16u) /* Size of an MD5 hash */ |
56 | |
57 | /*----- Type definitions --------------------------------------------------*/ |
58 | |
59 | /* --- MD5 context buffer --- */ |
60 | |
61 | typedef struct { |
62 | uint_32 val[4]; /* Result of the hash function */ |
63 | unsigned long size; /* Current size of data in bytes */ |
64 | unsigned char buf[64]; /* Buffer accumulating next block */ |
65 | } md5; |
66 | |
67 | /*----- Functions provided ------------------------------------------------*/ |
68 | |
69 | /* --- @md5_trans@ --- * |
70 | * |
71 | * Arguments: @unsigned char *v@ = pointer to chaining block (updated) |
72 | * @const unsigned char *buf@ = pointer to input buffer |
73 | * |
74 | * Returns: --- |
75 | * |
76 | * Use: Performs the MD5 transformation on a chunk of data. This may |
77 | * be useful for using MD5 in MDC-type cipher constructions. |
78 | */ |
79 | |
80 | extern void md5_trans(unsigned char */*v*/, const unsigned char */*buf*/); |
81 | |
82 | /* --- @md5_buffer@ --- * |
83 | * |
84 | * Arguments: @md5 *m@ = pointer to an MD5 context |
85 | * @const void *buff@ = pointer to buffer of data |
86 | * @size_t size@ = size of buffer |
87 | * |
88 | * Returns: --- |
89 | * |
90 | * Use: Hashes the buffer of data. You can call md5_buffer |
91 | * lots of times during an MD5 job, to allow big files to be |
92 | * split into little ones. |
93 | * |
94 | * This routine could be improved lots, to compare with the |
95 | * Straylight ARM assembler implementation, although that |
96 | * requires lots of work. Remember that the ARM version |
97 | * doesn't need to do endianness-fiddling. |
98 | */ |
99 | |
100 | extern void md5_buffer(md5 */*m*/, const void */*buff*/, size_t /*size*/); |
101 | |
102 | /* --- @md5_key@ --- * |
103 | * |
104 | * Arguments: @md5 *m@ = pointer to an MD5 context |
105 | * @const unsigned char *k@ = pointer to a 4-word `key' |
106 | * |
107 | * Returns: --- |
108 | * |
109 | * Use: Initialises a context buffer, with a chosen initialisation |
110 | * string (instead of the standard MD5 value). This allows you |
111 | * to use NMAC message authentication, should the urge take you. |
112 | */ |
113 | |
114 | extern void md5_key(md5 */*m*/, const unsigned char */*k*/); |
115 | |
116 | /* --- @md5_init@ --- * |
117 | * |
118 | * Arguments: @md5 *m@ = pointer to an MD5 context |
119 | * |
120 | * Returns: --- |
121 | * |
122 | * Use: Initialises the context buffer, so that you can do an |
123 | * MD5 job. |
124 | */ |
125 | |
126 | extern void md5_init(md5 */*m*/); |
127 | |
128 | /* --- @md5_final@ --- * |
129 | * |
130 | * Arguments: @md5 *m@ = pointer to context buffer |
131 | * @unsigned char *v@ = where to store the value |
132 | * |
133 | * Returns: --- |
134 | * |
135 | * Use: Finalises an MD5 buffer, so that you can use the result. |
136 | */ |
137 | |
138 | extern void md5_final(md5 */*m*/, unsigned char */*v*/); |
139 | |
140 | /*----- That's all, folks -------------------------------------------------*/ |
141 | |
142 | #ifdef __cplusplus |
143 | } |
144 | #endif |
145 | |
146 | #endif |