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
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
|
/* User authentication for vtysh.
* Copyright (C) 2000 Kunihiro Ishiguro
*
* This file is part of GNU Zebra.
*
* GNU Zebra is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2, or (at your option) any
* later version.
*
* GNU Zebra is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with GNU Zebra; see the file COPYING. If not, write to the Free
* Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
* 02111-1307, USA.
*/
#include <zebra.h>
#include <lib/version.h>
#include <pwd.h>
#ifdef USE_PAM
#include <security/pam_appl.h>
#ifdef HAVE_PAM_MISC_H
#include <security/pam_misc.h>
#endif
#ifdef HAVE_OPENPAM_H
#include <security/openpam.h>
#endif
#endif /* USE_PAM */
#include "memory.h"
#include "linklist.h"
#include "command.h"
#ifdef USE_PAM
static struct pam_conv conv =
{
PAM_CONV_FUNC,
NULL
};
int
vtysh_pam (const char *user)
{
int ret;
pam_handle_t *pamh = NULL;
/* Start PAM. */
ret = pam_start(QUAGGA_PROGNAME, user, &conv, &pamh);
/* printf ("ret %d\n", ret); */
/* Is user really user? */
if (ret == PAM_SUCCESS)
ret = pam_authenticate (pamh, 0);
/* printf ("ret %d\n", ret); */
#if 0
/* Permitted access? */
if (ret == PAM_SUCCESS)
ret = pam_acct_mgmt (pamh, 0);
printf ("ret %d\n", ret);
if (ret == PAM_AUTHINFO_UNAVAIL)
ret = PAM_SUCCESS;
#endif /* 0 */
/* This is where we have been authorized or not. */
#ifdef DEBUG
if (ret == PAM_SUCCESS)
printf("Authenticated\n");
else
printf("Not Authenticated\n");
#endif /* DEBUG */
/* close Linux-PAM */
if (pam_end (pamh, ret) != PAM_SUCCESS)
{
pamh = NULL;
fprintf(stderr, "vtysh_pam: failed to release authenticator\n");
exit(1);
}
return ret == PAM_SUCCESS ? 0 : 1;
}
#endif /* USE_PAM */
struct vtysh_user
{
char *name;
u_char nopassword;
};
struct list *userlist;
struct vtysh_user *
user_new ()
{
return XCALLOC (0, sizeof (struct vtysh_user));
}
void
user_free (struct vtysh_user *user)
{
XFREE (0, user);
}
struct vtysh_user *
user_lookup (const char *name)
{
struct listnode *node, *nnode;
struct vtysh_user *user;
for (ALL_LIST_ELEMENTS (userlist, node, nnode, user))
{
if (strcmp (user->name, name) == 0)
return user;
}
return NULL;
}
void
user_config_write ()
{
struct listnode *node, *nnode;
struct vtysh_user *user;
for (ALL_LIST_ELEMENTS (userlist, node, nnode, user))
{
if (user->nopassword)
printf (" username %s nopassword\n", user->name);
}
}
struct vtysh_user *
user_get (const char *name)
{
struct vtysh_user *user;
user = user_lookup (name);
if (user)
return user;
user = user_new ();
user->name = strdup (name);
listnode_add (userlist, user);
return user;
}
DEFUN (username_nopassword,
username_nopassword_cmd,
"username WORD nopassword",
"\n"
"\n"
"\n")
{
struct vtysh_user *user;
user = user_get (argv[0]);
user->nopassword = 1;
return CMD_SUCCESS;
}
int
vtysh_auth ()
{
struct vtysh_user *user;
struct passwd *passwd;
passwd = getpwuid (geteuid ());
user = user_lookup (passwd->pw_name);
if (user && user->nopassword)
/* Pass through */;
else
{
#ifdef USE_PAM
if (vtysh_pam (passwd->pw_name))
exit (0);
#endif /* USE_PAM */
}
return 0;
}
void
vtysh_user_init ()
{
userlist = list_new ();
install_element (CONFIG_NODE, &username_nopassword_cmd);
}
|
