1 /* $NetBSD: pam_login_access.c,v 1.4 2011/12/28 14:52:56 christos Exp $ */
2
3 /*-
4 * Copyright (c) 2001 Mark R V Murray
5 * All rights reserved.
6 * Copyright (c) 2001 Networks Associates Technology, Inc.
7 * All rights reserved.
8 *
9 * Portions of this software were developed for the FreeBSD Project by
10 * ThinkSec AS and NAI Labs, the Security Research Division of Network
11 * Associates, Inc. under DARPA/SPAWAR contract N66001-01-C-8035
12 * ("CBOSS"), as part of the DARPA CHATS research program.
13 *
14 * Redistribution and use in source and binary forms, with or without
15 * modification, are permitted provided that the following conditions
16 * are met:
17 * 1. Redistributions of source code must retain the above copyright
18 * notice, this list of conditions and the following disclaimer.
19 * 2. Redistributions in binary form must reproduce the above copyright
20 * notice, this list of conditions and the following disclaimer in the
21 * documentation and/or other materials provided with the distribution.
22 * 3. The name of the author may not be used to endorse or promote
23 * products derived from this software without specific prior written
24 * permission.
25 *
26 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
28 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
29 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
30 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
36 * SUCH DAMAGE.
37 */
38
39 #include <sys/cdefs.h>
40 #ifdef __FreeBSD__
41 __FBSDID("$FreeBSD: src/lib/libpam/modules/pam_login_access/pam_login_access.c,v 1.11 2004/02/10 10:13:21 des Exp $");
42 #else
43 __RCSID("$NetBSD: pam_login_access.c,v 1.4 2011/12/28 14:52:56 christos Exp $");
44 #endif
45
46 #define _BSD_SOURCE
47
48 #include <sys/param.h>
49
50 #include <unistd.h>
51
52 #define PAM_SM_ACCOUNT
53
54 #include <security/pam_appl.h>
55 #include <security/pam_modules.h>
56 #include <security/pam_mod_misc.h>
57
58 #include "pam_login_access.h"
59
60 PAM_EXTERN int
pam_sm_acct_mgmt(pam_handle_t * pamh,int flags __unused,int argc __unused,const char * argv[]__unused)61 pam_sm_acct_mgmt(pam_handle_t *pamh, int flags __unused,
62 int argc __unused, const char *argv[] __unused)
63 {
64 const void *rhost, *tty, *user;
65 char hostname[MAXHOSTNAMELEN];
66 int pam_err;
67
68 pam_err = pam_get_item(pamh, PAM_USER, &user);
69 if (pam_err != PAM_SUCCESS)
70 return (pam_err);
71
72 if (user == NULL)
73 return (PAM_SERVICE_ERR);
74
75 PAM_LOG("Got user: %s", (const char *)user);
76
77 pam_err = pam_get_item(pamh, PAM_RHOST, &rhost);
78 if (pam_err != PAM_SUCCESS)
79 return (pam_err);
80
81 pam_err = pam_get_item(pamh, PAM_TTY, &tty);
82 if (pam_err != PAM_SUCCESS)
83 return (pam_err);
84
85 gethostname(hostname, sizeof hostname);
86
87 if (rhost == NULL || *(const char *)rhost == '\0') {
88 PAM_LOG("Checking login.access for user %s on tty %s",
89 (const char *)user, (const char *)tty);
90 if (login_access(user, tty) != 0)
91 return (PAM_SUCCESS);
92 PAM_VERBOSE_ERROR("%s is not allowed to log in on %s",
93 (const char *)user, (const char *)tty);
94 } else {
95 PAM_LOG("Checking login.access for user %s from host %s",
96 (const char *)user, (const char *)rhost);
97 if (login_access(user, rhost) != 0)
98 return (PAM_SUCCESS);
99 PAM_VERBOSE_ERROR("%s is not allowed to log in from %s",
100 (const char *)user, (const char *)rhost);
101 }
102
103 return (PAM_AUTH_ERR);
104 }
105
106 PAM_MODULE_ENTRY("pam_login_access");
107