1/*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License, Version 1.0 only
6 * (the "License").  You may not use this file except in compliance
7 * with the License.
8 *
9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10 * or http://www.opensolaris.org/os/licensing.
11 * See the License for the specific language governing permissions
12 * and limitations under the License.
13 *
14 * When distributing Covered Code, include this CDDL HEADER in each
15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16 * If applicable, add the following below this CDDL HEADER, with the
17 * fields enclosed by brackets "[]" replaced with your own identifying
18 * information: Portions Copyright [yyyy] [name of copyright owner]
19 *
20 * CDDL HEADER END
21 */
22/*
23 * Copyright 2004 Sun Microsystems, Inc.  All rights reserved.
24 * Use is subject to license terms.
25 */
26
27#pragma ident	"%Z%%M%	%I%	%E% SMI"
28
29#include <sys/param.h>
30#include <security/pam_appl.h>
31#include <security/pam_modules.h>
32#include <pwd.h>
33#include <shadow.h>
34#include <string.h>
35#include <rpc/types.h>
36#include <rpc/auth.h>
37#include <locale.h>
38#include <crypt.h>
39#include <syslog.h>
40
41extern int ruserok(const char *, int, const char *, const char *);
42
43/*
44 * pam_sm_authenticate	- Checks if the user is allowed remote access
45 */
46/*ARGSUSED*/
47int
48pam_sm_authenticate(
49	pam_handle_t	*pamh,
50	int	flags,
51	int	argc,
52	const char	**argv)
53{
54	char *host = NULL, *lusername = NULL;
55	struct passwd pwd;
56	char pwd_buffer[1024];
57	int	is_superuser;
58	char	*rusername;
59	int	i;
60	int	debug = 0;
61
62	for (i = 0; i < argc; i++) {
63		if (strcasecmp(argv[i], "debug") == 0)
64			debug = 1;
65		else
66			syslog(LOG_DEBUG, "illegal option %s", argv[i]);
67	}
68
69	if (pam_get_item(pamh, PAM_USER, (void **) &lusername) != PAM_SUCCESS)
70		return (PAM_SERVICE_ERR);
71	if (pam_get_item(pamh, PAM_RHOST, (void **) &host) != PAM_SUCCESS)
72		return (PAM_SERVICE_ERR);
73	if (pam_get_item(pamh, PAM_RUSER, (void **)&rusername) != PAM_SUCCESS)
74		return (PAM_SERVICE_ERR);
75
76	if (lusername == NULL || *lusername == '\0')
77		return (PAM_USER_UNKNOWN);
78	if (rusername == NULL || *rusername == '\0')
79		return (PAM_AUTH_ERR);
80	if (host == NULL || *host == '\0')
81		return (PAM_AUTH_ERR);
82
83	if (debug) {
84		syslog(LOG_DEBUG,
85			"rhosts authenticate: user = %s, host = %s",
86			lusername, host);
87	}
88
89	if (getpwnam_r(lusername, &pwd, pwd_buffer, sizeof (pwd_buffer))
90								== NULL)
91		return (PAM_USER_UNKNOWN);
92
93	if (pwd.pw_uid == 0)
94		is_superuser = 1;
95	else
96		is_superuser = 0;
97
98	return (ruserok(host, is_superuser, rusername, lusername)
99		== -1 ? PAM_AUTH_ERR : PAM_SUCCESS);
100
101}
102
103/*
104 * dummy pam_sm_setcred - does nothing
105 */
106/*ARGSUSED*/
107int
108pam_sm_setcred(
109	pam_handle_t	*pamh,
110	int	flags,
111	int	argc,
112	const char	**argv)
113{
114	return (PAM_IGNORE);
115}
116