1/*-
2 * SPDX-License-Identifier: BSD-3-Clause
3 *
4 * Copyright (c) 2002 Networks Associates Technology, Inc.
5 * All rights reserved.
6 *
7 * This software was developed for the FreeBSD Project by ThinkSec AS and
8 * NAI Labs, the Security Research Division of Network Associates, Inc.
9 * under DARPA/SPAWAR contract N66001-01-C-8035 ("CBOSS"), as part of the
10 * DARPA CHATS research program.
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
15 * 1. Redistributions of source code must retain the above copyright
16 *    notice, this list of conditions and the following disclaimer.
17 * 2. Redistributions in binary form must reproduce the above copyright
18 *    notice, this list of conditions and the following disclaimer in the
19 *    documentation and/or other materials provided with the distribution.
20 * 3. The name of the author may not be used to endorse or promote
21 *    products derived from this software without specific prior written
22 *    permission.
23 *
24 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34 * SUCH DAMAGE.
35 */
36
37#include <sys/cdefs.h>
38__FBSDID("$FreeBSD$");
39
40#define _BSD_SOURCE
41
42#include <sys/types.h>
43#include <opie.h>
44#include <pwd.h>
45#include <unistd.h>
46#include <syslog.h>
47
48#define PAM_SM_AUTH
49
50#include <security/pam_appl.h>
51#include <security/pam_modules.h>
52#include <security/pam_mod_misc.h>
53
54PAM_EXTERN int
55pam_sm_authenticate(pam_handle_t *pamh, int flags __unused,
56    int argc __unused, const char *argv[] __unused)
57{
58	struct opie opie;
59	struct passwd *pwent;
60	const void *luser, *rhost;
61	int r;
62
63	r = pam_get_item(pamh, PAM_USER, &luser);
64	if (r != PAM_SUCCESS)
65		return (r);
66	if (luser == NULL)
67		return (PAM_SERVICE_ERR);
68
69	pwent = getpwnam(luser);
70	if (pwent == NULL || opielookup(&opie, __DECONST(char *, luser)) != 0)
71		return (PAM_SUCCESS);
72
73	r = pam_get_item(pamh, PAM_RHOST, &rhost);
74	if (r != PAM_SUCCESS)
75		return (r);
76	if (rhost == NULL || *(const char *)rhost == '\0')
77		rhost = openpam_get_option(pamh, "allow_local") ?
78		    "" : "localhost";
79
80	if (opieaccessfile(__DECONST(char *, rhost)) != 0 &&
81	    opiealways(pwent->pw_dir) != 0)
82		return (PAM_SUCCESS);
83
84	PAM_VERBOSE_ERROR("Refused; remote host is not in opieaccess");
85
86	return (PAM_AUTH_ERR);
87}
88
89PAM_EXTERN int
90pam_sm_setcred(pam_handle_t *pamh __unused, int flags __unused,
91    int argc __unused, const char *argv[] __unused)
92{
93
94	return (PAM_SUCCESS);
95}
96
97PAM_MODULE_ENTRY("pam_opieaccess");
98