1/*	$NetBSD: pam_login_access.c,v 1.3 2006/11/03 18:03:23 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 1.3 2006/11/03 18:03:23 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
60PAM_EXTERN int
61pam_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
106PAM_MODULE_ENTRY("pam_login_access");
107