mdXhl.c revision 1.6 
1/*	$NetBSD: mdXhl.c,v 1.6 2003/07/26 19:24:47 salo 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 * Modifed April 29, 1997 by Jason R. Thorpe <thorpej@NetBSD.org>
16 */
17
18#include <sys/types.h>
19
20#include <assert.h>
21#include <fcntl.h>
22#include <errno.h>
23#include <stdio.h>
24#include <stdlib.h>
25#include <unistd.h>
26
27#define	CONCAT(x,y)	__CONCAT(x,y)
28#define	MDNAME(x)	CONCAT(MDALGORITHM,x)
29
30char *
31MDNAME(End)(ctx, buf)
32	MDNAME(_CTX) *ctx;
33	char *buf;
34{
35	int i;
36	unsigned char digest[16];
37	static const char hex[]="0123456789abcdef";
38
39	_DIAGASSERT(ctx != 0);
40
41	if (buf == NULL)
42		buf = malloc(33);
43	if (buf == NULL)
44		return (NULL);
45
46	MDNAME(Final)(digest, ctx);
47
48	for (i = 0; i < 16; i++) {
49		buf[i+i] = hex[(u_int32_t)digest[i] >> 4];
50		buf[i+i+1] = hex[digest[i] & 0x0f];
51	}
52
53	buf[i+i] = '\0';
54	return (buf);
55}
56
57char *
58MDNAME(File)(filename, buf)
59	const char *filename;
60	char *buf;
61{
62	unsigned char buffer[BUFSIZ];
63	MDNAME(_CTX) ctx;
64	int f, i, j;
65
66	_DIAGASSERT(filename != 0);
67	/* buf may be NULL */
68
69	MDNAME(Init)(&ctx);
70	f = open(filename, O_RDONLY, 0666);
71	if (f < 0)
72		return NULL;
73
74	while ((i = read(f, buffer, sizeof(buffer))) > 0)
75		MDNAME(Update)(&ctx, buffer, (unsigned int)i);
76
77	j = errno;
78	close(f);
79	errno = j;
80
81	if (i < 0)
82		return NULL;
83
84	return (MDNAME(End)(&ctx, buf));
85}
86
87char *
88MDNAME(Data)(data, len, buf)
89	const unsigned char *data;
90	unsigned int len;
91	char *buf;
92{
93	MDNAME(_CTX) ctx;
94
95	_DIAGASSERT(data != 0);
96
97	MDNAME(Init)(&ctx);
98	MDNAME(Update)(&ctx, data, len);
99	return (MDNAME(End)(&ctx, buf));
100}
101