mdXhl.c revision 1.7 
1/*	$NetBSD: mdXhl.c,v 1.7 2005/09/26 03:01:41 christos Exp $	*/
2
3/*
4 * ----------------------------------------------------------------------------
5 * "THE BEER-WARE LICENSE" (Revision 42):
6 * <phk@login.dkuug.dk> wrote this file.  As long as you retain this notice you
7 * can do whatever you want with this stuff. If we meet some day, and you think
8 * this stuff is worth it, you can buy me a beer in return.   Poul-Henning Kamp
9 * ----------------------------------------------------------------------------
10 *
11 * from FreeBSD Id: mdXhl.c,v 1.8 1996/10/25 06:48:12 bde Exp
12 */
13
14/*
15 * Modified April 29, 1997 by Jason R. Thorpe <thorpej@NetBSD.org>
16 */
17
18#define	CONCAT(x,y)	__CONCAT(x,y)
19#define	MDNAME(x)	CONCAT(MDALGORITHM,x)
20
21#if !defined(_KERNEL) && defined(__weak_alias)
22#define	WA(a,b)	__weak_alias(a,b)
23WA(MDNAME(End),CONCAT(_,MDNAME(End)))
24WA(MDNAME(File),CONCAT(_,MDNAME(File)))
25WA(MDNAME(Data),CONCAT(_,MDNAME(Data)))
26#undef WA
27#endif
28
29#include "namespace.h"
30
31#include <sys/types.h>
32
33#include MDINCLUDE
34#include <assert.h>
35#include <fcntl.h>
36#include <errno.h>
37#include <stdio.h>
38#include <stdlib.h>
39#include <unistd.h>
40
41#if HAVE_NBTOOL_CONFIG_H
42#include "nbtool_config.h"
43#endif
44
45
46
47char *
48MDNAME(End)(ctx, buf)
49	MDNAME(_CTX) *ctx;
50	char *buf;
51{
52	int i;
53	unsigned char digest[16];
54	static const char hex[]="0123456789abcdef";
55
56	_DIAGASSERT(ctx != 0);
57
58	if (buf == NULL)
59		buf = malloc(33);
60	if (buf == NULL)
61		return (NULL);
62
63	MDNAME(Final)(digest, ctx);
64
65	for (i = 0; i < 16; i++) {
66		buf[i+i] = hex[(u_int32_t)digest[i] >> 4];
67		buf[i+i+1] = hex[digest[i] & 0x0f];
68	}
69
70	buf[i+i] = '\0';
71	return (buf);
72}
73
74char *
75MDNAME(File)(filename, buf)
76	const char *filename;
77	char *buf;
78{
79	unsigned char buffer[BUFSIZ];
80	MDNAME(_CTX) ctx;
81	int f, i, j;
82
83	_DIAGASSERT(filename != 0);
84	/* buf may be NULL */
85
86	MDNAME(Init)(&ctx);
87	f = open(filename, O_RDONLY, 0666);
88	if (f < 0)
89		return NULL;
90
91	while ((i = read(f, buffer, sizeof(buffer))) > 0)
92		MDNAME(Update)(&ctx, buffer, (unsigned int)i);
93
94	j = errno;
95	close(f);
96	errno = j;
97
98	if (i < 0)
99		return NULL;
100
101	return (MDNAME(End)(&ctx, buf));
102}
103
104char *
105MDNAME(Data)(data, len, buf)
106	const unsigned char *data;
107	unsigned int len;
108	char *buf;
109{
110	MDNAME(_CTX) ctx;
111
112	_DIAGASSERT(data != 0);
113
114	MDNAME(Init)(&ctx);
115	MDNAME(Update)(&ctx, data, len);
116	return (MDNAME(End)(&ctx, buf));
117}
118