3 * $Id: md5.h,v 1.1 1997/07/21 13:47:47 mdw Exp $
5 * MD-5 secure hash routines
6 * Based on RSA MD-5 code
8 * (c) 1996, 1997 Mark Wooding
11 /*----- Licencing notice --------------------------------------------------*
13 * This file is part of `become'
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.
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.
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.
30 /*----- Revision history --------------------------------------------------*
33 * Revision 1.1 1997/07/21 13:47:47 mdw
45 /*----- Required headers --------------------------------------------------*/
53 /*----- Useful constants --------------------------------------------------*/
55 #define MD5_HASHSIZE (16u) /* Size of an MD5 hash */
57 /*----- Type definitions --------------------------------------------------*/
59 /* --- MD5 context buffer --- */
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 */
67 /*----- Functions provided ------------------------------------------------*/
69 /* --- @md5_trans@ --- *
71 * Arguments: @unsigned char *v@ = pointer to chaining block (updated)
72 * @const unsigned char *buf@ = pointer to input buffer
76 * Use: Performs the MD5 transformation on a chunk of data. This may
77 * be useful for using MD5 in MDC-type cipher constructions.
80 extern void md5_trans(unsigned char */*v*/, const unsigned char */*buf*/);
82 /* --- @md5_buffer@ --- *
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
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.
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.
100 extern void md5_buffer(md5 */*m*/, const void */*buff*/, size_t /*size*/);
102 /* --- @md5_key@ --- *
104 * Arguments: @md5 *m@ = pointer to an MD5 context
105 * @const unsigned char *k@ = pointer to a 4-word `key'
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.
114 extern void md5_key(md5 */*m*/, const unsigned char */*k*/);
116 /* --- @md5_init@ --- *
118 * Arguments: @md5 *m@ = pointer to an MD5 context
122 * Use: Initialises the context buffer, so that you can do an
126 extern void md5_init(md5 */*m*/);
128 /* --- @md5_final@ --- *
130 * Arguments: @md5 *m@ = pointer to context buffer
131 * @unsigned char *v@ = where to store the value
135 * Use: Finalises an MD5 buffer, so that you can use the result.
138 extern void md5_final(md5 */*m*/, unsigned char */*v*/);
140 /*----- That's all, folks -------------------------------------------------*/