mdw@git.distorted.org.uk Git - become/blob - src/md5.h

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