| 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 |