1/*	$NetBSD: mdXhl.c,v 1.12 2014/09/24 07:53:07 he 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#if HAVE_NBTOOL_CONFIG_H
19#include "nbtool_config.h"
20#endif
21
22#define	CONCAT(x,y)	__CONCAT(x,y)
23#define	MDNAME(x)	CONCAT(MDALGORITHM,x)
24
25#if !defined(_KERNEL) && defined(__weak_alias) && !defined(HAVE_NBTOOL_CONFIG_H)
26#define	WA(a,b)	__weak_alias(a,b)
27WA(MDNAME(End),CONCAT(_,MDNAME(End)))
28WA(MDNAME(File),CONCAT(_,MDNAME(File)))
29WA(MDNAME(Data),CONCAT(_,MDNAME(Data)))
30#undef WA
31#endif
32
33#include "namespace.h"
34
35#include <sys/types.h>
36
37#include MDINCLUDE
38#include <assert.h>
39#include <fcntl.h>
40#include <errno.h>
41#include <stdio.h>
42#include <stdlib.h>
43#include <unistd.h>
44
45char *
46MDNAME(End)(MDNAME(_CTX) *ctx, char *buf)
47{
48	int i;
49	unsigned char digest[16];
50	static const char hex[]="0123456789abcdef";
51
52	_DIAGASSERT(ctx != 0);
53
54	if (buf == NULL)
55		buf = malloc(33);
56	if (buf == NULL)
57		return (NULL);
58
59	MDNAME(Final)(digest, ctx);
60
61	for (i = 0; i < 16; i++) {
62		buf[i+i] = hex[(u_int32_t)digest[i] >> 4];
63		buf[i+i+1] = hex[digest[i] & 0x0f];
64	}
65
66	buf[i+i] = '\0';
67	return (buf);
68}
69
70char *
71MDNAME(File)(const char *filename, char *buf)
72{
73	unsigned char buffer[BUFSIZ];
74	MDNAME(_CTX) ctx;
75	int f, j;
76	ssize_t i;
77
78	_DIAGASSERT(filename != 0);
79	/* buf may be NULL */
80
81	MDNAME(Init)(&ctx);
82	f = open(filename, O_RDONLY | O_CLOEXEC, 0666);
83	if (f < 0)
84		return NULL;
85
86	while ((i = read(f, buffer, sizeof(buffer))) > 0)
87		MDNAME(Update)(&ctx, buffer, (unsigned int)i);
88
89	j = errno;
90	close(f);
91	errno = j;
92
93	if (i < 0)
94		return NULL;
95
96	return (MDNAME(End)(&ctx, buf));
97}
98
99char *
100MDNAME(Data)(const unsigned char *data, unsigned int len, char *buf)
101{
102	MDNAME(_CTX) ctx;
103
104	_DIAGASSERT(data != 0);
105
106	MDNAME(Init)(&ctx);
107	MDNAME(Update)(&ctx, data, len);
108	return (MDNAME(End)(&ctx, buf));
109}
110