2 * SPDX-License-Identifier: BSD-3-Clause
4 * Copyright (c) 2001 Mark R V Murray
6 * Copyright (c) 2001 Networks Associates Technology, Inc.
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.
14 * Redistribution and use in source and binary forms, with or without
15 * modification, are permitted provided that the following conditions
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
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
38 * $FreeBSD: head/lib/libpam/modules/pam_securetty/pam_securetty.c 326219 2017-11-26 02:00:33Z pfg $
41 #include <sys/types.h>
47 #define PAM_SM_ACCOUNT
49 #include <security/pam_appl.h>
50 #include <security/pam_modules.h>
51 #include <security/pam_mod_misc.h>
53 #define TTY_PREFIX "/dev/"
56 pam_sm_acct_mgmt(pam_handle_t *pamh __unused, int flags __unused,
57 int argc __unused, const char *argv[] __unused)
65 pam_err = pam_get_user(pamh, &user, NULL);
66 if (pam_err != PAM_SUCCESS)
68 if (user == NULL || (pwd = getpwnam(user)) == NULL)
69 return (PAM_SERVICE_ERR);
71 PAM_LOG("Got user: %s", user);
73 /* If the user is not root, secure ttys do not apply */
77 pam_err = pam_get_item(pamh, PAM_TTY, &tty);
78 if (pam_err != PAM_SUCCESS)
81 PAM_LOG("Got TTY: %s", (const char *)tty);
83 /* Ignore any "/dev/" on the PAM_TTY item */
84 if (tty != NULL && strncmp(TTY_PREFIX, tty, sizeof(TTY_PREFIX)) == 0) {
85 PAM_LOG("WARNING: PAM_TTY starts with " TTY_PREFIX);
86 tty = (const char *)tty + sizeof(TTY_PREFIX) - 1;
89 if (tty != NULL && (ty = getttynam(tty)) != NULL &&
90 (ty->ty_status & TTY_SECURE) != 0)
93 PAM_VERBOSE_ERROR("Not on secure TTY");
94 return (PAM_AUTH_ERR);
97 PAM_MODULE_ENTRY("pam_securetty");