1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
|
/*
* Copyright (c) 1994-1996, 1998-1999, 2001, 2003
* Todd C. Miller <Todd.Miller@courtesan.com>. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* 4. Products derived from this software may not be called "Sudo" nor
* may "Sudo" appear in their names without specific prior written
* permission from the author.
*
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
* AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
* THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "config.h"
#include <sys/types.h>
#include <sys/param.h>
#include <stdio.h>
#ifdef STDC_HEADERS
# include <stdlib.h>
# include <stddef.h>
#else
# ifdef HAVE_STDLIB_H
# include <stdlib.h>
# endif
#endif /* STDC_HEADERS */
#ifdef HAVE_STRING_H
# include <string.h>
#else
# ifdef HAVE_STRINGS_H
# include <strings.h>
# endif
#endif /* HAVE_STRING_H */
#ifdef HAVE_UNISTD_H
# include <unistd.h>
#endif /* HAVE_UNISTD_H */
#ifdef HAVE_ERR_H
# include <err.h>
#else
# include "emul/err.h"
#endif /* HAVE_ERR_H */
#include <pwd.h>
#if defined(HAVE_SKEY)
# include <skey.h>
# define RFC1938 skey
# ifdef __NetBSD__
# define rfc1938challenge(a,b,c,d) skeychallenge((a),(b),(c),(d))
# else
# define rfc1938challenge(a,b,c,d) skeychallenge((a),(b),(c))
# endif
# define rfc1938verify(a,b) skeyverify((a),(b))
#elif defined(HAVE_OPIE)
# include <opie.h>
# define RFC1938 opie
# define rfc1938challenge(a,b,c,d) opiechallenge((a),(b),(c))
# define rfc1938verify(a,b) opieverify((a),(b))
#endif
#include "sudo.h"
#include "sudo_auth.h"
#ifndef lint
static const char rcsid[] = "$Sudo: rfc1938.c,v 1.13 2003/04/02 18:25:30 millert Exp $";
#endif /* lint */
int
rfc1938_setup(pw, promptp, auth)
struct passwd *pw;
char **promptp;
sudo_auth *auth;
{
char challenge[256];
static char *orig_prompt = NULL, *new_prompt = NULL;
static int op_len, np_size;
static struct RFC1938 rfc1938;
/* Stash a pointer to the rfc1938 struct if we have not initialized */
if (!auth->data)
auth->data = &rfc1938;
/* Save the original prompt */
if (orig_prompt == NULL) {
orig_prompt = *promptp;
op_len = strlen(orig_prompt);
/* Ignore trailing colon (we will add our own) */
if (orig_prompt[op_len - 1] == ':')
op_len--;
else if (op_len >= 2 && orig_prompt[op_len - 1] == ' '
&& orig_prompt[op_len - 2] == ':')
op_len -= 2;
}
#ifdef HAVE_SKEY
/* Close old stream */
if (rfc1938.keyfile)
(void) fclose(rfc1938.keyfile);
#endif
/*
* Look up the user and get the rfc1938 challenge.
* If the user is not in the OTP db, only post a fatal error if
* we are running alone (since they may just use a normal passwd).
*/
if (rfc1938challenge(&rfc1938, pw->pw_name, challenge, sizeof(challenge))) {
if (IS_ONEANDONLY(auth)) {
warnx("you do not exist in the %s database", auth->name);
return(AUTH_FATAL);
} else {
return(AUTH_FAILURE);
}
}
/* Get space for new prompt with embedded challenge */
if (np_size < op_len + strlen(challenge) + 7) {
np_size = op_len + strlen(challenge) + 7;
new_prompt = (char *) erealloc(new_prompt, np_size);
}
if (def_flag(I_LONG_OTP_PROMPT))
(void) snprintf(new_prompt, np_size, "%s\n%s", challenge, orig_prompt);
else
(void) snprintf(new_prompt, np_size, "%.*s [ %s ]:", op_len,
orig_prompt, challenge);
*promptp = new_prompt;
return(AUTH_SUCCESS);
}
int
rfc1938_verify(pw, pass, auth)
struct passwd *pw;
char *pass;
sudo_auth *auth;
{
if (rfc1938verify((struct RFC1938 *) auth->data, pass) == 0)
return(AUTH_SUCCESS);
else
return(AUTH_FAILURE);
}
|
