crypt.c revision 74106 
1/*
2 * Copyright (c) 1999
3 *      Mark Murray.  All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY MARK MURRAY AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED.  IN NO EVENT SHALL MARK MURRAY OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 *
26 * $FreeBSD: head/lib/libcrypt/crypt.c 74106 2001-03-11 16:05:43Z markm $
27 *
28 */
29
30#if defined(LIBC_SCCS) && !defined(lint)
31static const char rcsid[] =
32"$FreeBSD: head/lib/libcrypt/crypt.c 74106 2001-03-11 16:05:43Z markm $";
33#endif /* LIBC_SCCS and not lint */
34
35#include <sys/types.h>
36#include <string.h>
37#include <libutil.h>
38#include "crypt.h"
39
40static const struct {
41	const char *const name;
42	char *(*const func)(const char *, const char *);
43	const char *const magic;
44} crypt_types[] = {
45#ifdef HAS_DES
46	{
47		"des",
48		crypt_des,
49		NULL
50	},
51#endif
52	{
53		"md5",
54		crypt_md5,
55		"$1$"
56	},
57#ifdef HAS_BLOWFISH
58	{
59		"blf",
60		crypt_blowfish,
61		"$2"
62	},
63#endif
64	{
65		NULL,
66		NULL
67	}
68};
69
70static int crypt_type = -1;
71
72static void
73crypt_setdefault(void)
74{
75	char *def;
76	int i;
77
78	if (crypt_type != -1)
79		return;
80	def = auth_getval("crypt_default");
81	if (def == NULL) {
82		crypt_type = 0;
83		return;
84	}
85	for (i = 0; i < sizeof(crypt_types) / sizeof(crypt_types[0]) - 1; i++) {
86		if (strcmp(def, crypt_types[i].name) == 0) {
87			crypt_type = i;
88			return;
89		}
90	}
91	crypt_type = 0;
92}
93
94const char *
95crypt_get_format(void)
96{
97
98	crypt_setdefault();
99	return (crypt_types[crypt_type].name);
100}
101
102int
103crypt_set_format(char *type)
104{
105	int i;
106
107	crypt_setdefault();
108	for (i = 0; i < sizeof(crypt_types) / sizeof(crypt_types[0]) - 1; i++) {
109		if (strcmp(type, crypt_types[i].name) == 0) {
110			crypt_type = i;
111			return (1);
112		}
113	}
114	return (0);
115}
116
117char *
118crypt(char *passwd, char *salt)
119{
120	int i;
121
122	crypt_setdefault();
123	for (i = 0; i < sizeof(crypt_types) / sizeof(crypt_types[0]) - 1; i++) {
124		if (crypt_types[i].magic != NULL && strncmp(salt,
125		    crypt_types[i].magic, strlen(crypt_types[i].magic)) == 0)
126			return (crypt_types[i].func(passwd, salt));
127	}
128	return (crypt_types[crypt_type].func(passwd, salt));
129}
130