Add sha256/512 support to libcrypt, change default
[dragonfly.git] / lib / libcrypt / crypt.c
CommitLineData
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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: src/lib/libcrypt/crypt.c,v 1.14.2.2 2001/05/24 12:20:02 markm Exp $
2c3b12ff 27 * $DragonFly: src/lib/libcrypt/crypt.c,v 1.3 2005/08/04 17:27:09 drhodus Exp $
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28 */
29
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30#include <sys/types.h>
31#include <string.h>
32#include <libutil.h>
33#include "crypt.h"
34
35static const struct {
36 const char *const name;
37 char *(*const func)(const char *, const char *);
38 const char *const magic;
39} crypt_types[] = {
40#ifdef HAS_DES
41 {
42 "des",
43 crypt_des,
44 NULL
45 },
46#endif
47 {
48 "md5",
49 crypt_md5,
50 "$1$"
51 },
52#ifdef HAS_BLOWFISH
53 {
54 "blf",
55 crypt_blowfish,
56 "$2"
57 },
58#endif
59 {
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60 "sha256",
61 crypt_sha256,
62 "$3$"
63 },
64 {
65 "sha512",
66 crypt_sha512,
67 "$4$"
68 },
69 {
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70 NULL,
71 NULL
72 }
73};
74
75static int crypt_type = -1;
76
77static void
78crypt_setdefault(void)
79{
80 char *def;
81 int i;
82
83 if (crypt_type != -1)
84 return;
85 def = auth_getval("crypt_default");
86 if (def == NULL) {
87 crypt_type = 0;
88 return;
89 }
90 for (i = 0; i < sizeof(crypt_types) / sizeof(crypt_types[0]) - 1; i++) {
91 if (strcmp(def, crypt_types[i].name) == 0) {
92 crypt_type = i;
93 return;
94 }
95 }
96 crypt_type = 0;
97}
98
99const char *
100crypt_get_format(void)
101{
102
103 crypt_setdefault();
104 return (crypt_types[crypt_type].name);
105}
106
107int
108crypt_set_format(char *type)
109{
110 int i;
111
112 crypt_setdefault();
113 for (i = 0; i < sizeof(crypt_types) / sizeof(crypt_types[0]) - 1; i++) {
114 if (strcmp(type, crypt_types[i].name) == 0) {
115 crypt_type = i;
116 return (1);
117 }
118 }
119 return (0);
120}
121
122char *
123crypt(char *passwd, char *salt)
124{
125 int i;
126
127 crypt_setdefault();
128 for (i = 0; i < sizeof(crypt_types) / sizeof(crypt_types[0]) - 1; i++) {
129 if (crypt_types[i].magic != NULL && strncmp(salt,
130 crypt_types[i].magic, strlen(crypt_types[i].magic)) == 0)
131 return (crypt_types[i].func(passwd, salt));
132 }
133 return (crypt_types[crypt_type].func(passwd, salt));
134}