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1 | /* -*-c-*- |
2 | * |
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3 | * $Id: md5.h,v 1.3 1998/01/12 16:46:13 mdw Exp $ |
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4 | * |
5 | * MD-5 secure hash routines |
6 | * Based on RSA MD-5 code |
7 | * |
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8 | * (c) 1996-1998 Mark Wooding |
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9 | */ |
10 | |
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11 | /*----- Licensing notice --------------------------------------------------* |
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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 |
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26 | * along with `become'; if not, write to the Free Software Foundation, |
27 | * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
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28 | */ |
29 | |
30 | /*----- Revision history --------------------------------------------------* |
31 | * |
32 | * $Log: md5.h,v $ |
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33 | * Revision 1.3 1998/01/12 16:46:13 mdw |
34 | * Fix copyright date. |
35 | * |
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36 | * Revision 1.2 1997/08/04 10:24:23 mdw |
37 | * Sources placed under CVS control. |
38 | * |
39 | * Revision 1.1 1997/07/21 13:47:47 mdw |
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40 | * Initial revision |
41 | * |
42 | */ |
43 | |
44 | #ifndef MD5_H |
45 | #define MD5_H |
46 | |
47 | #ifdef __cplusplus |
48 | extern "C" { |
49 | #endif |
50 | |
51 | /*----- Required headers --------------------------------------------------*/ |
52 | |
53 | #include <stddef.h> |
54 | |
55 | #ifndef CONFIG_H |
56 | # include "config.h" |
57 | #endif |
58 | |
59 | /*----- Useful constants --------------------------------------------------*/ |
60 | |
61 | #define MD5_HASHSIZE (16u) /* Size of an MD5 hash */ |
62 | |
63 | /*----- Type definitions --------------------------------------------------*/ |
64 | |
65 | /* --- MD5 context buffer --- */ |
66 | |
67 | typedef struct { |
68 | uint_32 val[4]; /* Result of the hash function */ |
69 | unsigned long size; /* Current size of data in bytes */ |
70 | unsigned char buf[64]; /* Buffer accumulating next block */ |
71 | } md5; |
72 | |
73 | /*----- Functions provided ------------------------------------------------*/ |
74 | |
75 | /* --- @md5_trans@ --- * |
76 | * |
77 | * Arguments: @unsigned char *v@ = pointer to chaining block (updated) |
78 | * @const unsigned char *buf@ = pointer to input buffer |
79 | * |
80 | * Returns: --- |
81 | * |
82 | * Use: Performs the MD5 transformation on a chunk of data. This may |
83 | * be useful for using MD5 in MDC-type cipher constructions. |
84 | */ |
85 | |
86 | extern void md5_trans(unsigned char */*v*/, const unsigned char */*buf*/); |
87 | |
88 | /* --- @md5_buffer@ --- * |
89 | * |
90 | * Arguments: @md5 *m@ = pointer to an MD5 context |
91 | * @const void *buff@ = pointer to buffer of data |
92 | * @size_t size@ = size of buffer |
93 | * |
94 | * Returns: --- |
95 | * |
96 | * Use: Hashes the buffer of data. You can call md5_buffer |
97 | * lots of times during an MD5 job, to allow big files to be |
98 | * split into little ones. |
99 | * |
100 | * This routine could be improved lots, to compare with the |
101 | * Straylight ARM assembler implementation, although that |
102 | * requires lots of work. Remember that the ARM version |
103 | * doesn't need to do endianness-fiddling. |
104 | */ |
105 | |
106 | extern void md5_buffer(md5 */*m*/, const void */*buff*/, size_t /*size*/); |
107 | |
108 | /* --- @md5_key@ --- * |
109 | * |
110 | * Arguments: @md5 *m@ = pointer to an MD5 context |
111 | * @const unsigned char *k@ = pointer to a 4-word `key' |
112 | * |
113 | * Returns: --- |
114 | * |
115 | * Use: Initialises a context buffer, with a chosen initialisation |
116 | * string (instead of the standard MD5 value). This allows you |
117 | * to use NMAC message authentication, should the urge take you. |
118 | */ |
119 | |
120 | extern void md5_key(md5 */*m*/, const unsigned char */*k*/); |
121 | |
122 | /* --- @md5_init@ --- * |
123 | * |
124 | * Arguments: @md5 *m@ = pointer to an MD5 context |
125 | * |
126 | * Returns: --- |
127 | * |
128 | * Use: Initialises the context buffer, so that you can do an |
129 | * MD5 job. |
130 | */ |
131 | |
132 | extern void md5_init(md5 */*m*/); |
133 | |
134 | /* --- @md5_final@ --- * |
135 | * |
136 | * Arguments: @md5 *m@ = pointer to context buffer |
137 | * @unsigned char *v@ = where to store the value |
138 | * |
139 | * Returns: --- |
140 | * |
141 | * Use: Finalises an MD5 buffer, so that you can use the result. |
142 | */ |
143 | |
144 | extern void md5_final(md5 */*m*/, unsigned char */*v*/); |
145 | |
146 | /*----- That's all, folks -------------------------------------------------*/ |
147 | |
148 | #ifdef __cplusplus |
149 | } |
150 | #endif |
151 | |
152 | #endif |