1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
|
/*
* Declaration of functions and data types used for MD5 sum computing
* library functions.
* Copyright (C) 1995, 1996, 1997, 1999, 2000 Free Software Foundation, Inc.
*
* Minor modifications for use with GNU Backgammon.
* Copyright (C) 2009-2021 the AUTHORS
*
* License changed from the GNU LGPL to the GNU GPL (as permitted under Term 3
* of the GNU LGPL) by Gary Wong for distribution with GNU Backgammon.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*
* $Id: md5.h,v 1.8 2014/05/11 15:20:32 plm Exp $
*/
#ifndef MD5_H
#define MD5_H 1
#include <stdint.h>
#include <stdio.h>
#include "common.h"
typedef uint32_t md5_uint32;
/* Structure to save state of computation between the single steps. */
struct md5_ctx {
md5_uint32 A;
md5_uint32 B;
md5_uint32 C;
md5_uint32 D;
md5_uint32 total[2];
md5_uint32 buflen;
char buffer[128] __attribute__ ((__aligned__(__alignof__(md5_uint32))));
};
/*
* The following three functions are build up the low level used in
* the functions `md5_stream' and `md5_buffer'.
*/
/* Initialize structure containing state of computation.
* (RFC 1321, 3.3: Step 3) */
extern void md5_init_ctx(struct md5_ctx *ctx);
/* Starting with the result of former calls of this function (or the
* initialization function) update the context for the next LEN bytes
* starting at BUFFER.
* It is necessary that LEN is a multiple of 64!!! */
extern void md5_process_block(const void *buffer, size_t len, struct md5_ctx *ctx);
/* Starting with the result of former calls of this function (or the
* initialization function) update the context for the next LEN bytes
* starting at BUFFER.
* It is NOT required that LEN is a multiple of 64. */
extern void md5_process_bytes(const void *buffer, size_t len, struct md5_ctx *ctx);
/* Process the remaining bytes in the buffer and put result from CTX
* in first 16 bytes following RESBUF. The result is always in little
* endian byte order, so that a byte-wise output yields to the wanted
* ASCII representation of the message digest.
*
* IMPORTANT: On some systems it is required that RESBUF is correctly
* aligned for a 32 bits value. */
extern void *md5_finish_ctx(struct md5_ctx *ctx, void *resbuf);
/* Put result from CTX in first 16 bytes following RESBUF. The result is
* always in little endian byte order, so that a byte-wise output yields
* to the wanted ASCII representation of the message digest.
*
* IMPORTANT: On some systems it is required that RESBUF is correctly
* aligned for a 32 bits value. */
extern void *md5_read_ctx(const struct md5_ctx *ctx, void *resbuf);
#if 0
/* Compute MD5 message digest for bytes read from STREAM. The
* resulting message digest number will be written into the 16 bytes
* beginning at RESBLOCK. */
extern int md5_stream(FILE * stream, void *resblock);
#endif
/* Compute MD5 message digest for LEN bytes beginning at BUFFER. The
* result is always in little endian byte order, so that a byte-wise
* output yields to the wanted ASCII representation of the message
* digest. */
extern void *md5_buffer(const char *buffer, size_t len, void *resblock);
#endif /* md5.h */
|
