1 /*- 2 * SPDX-License-Identifier: BSD-3-Clause 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 * $FreeBSD: head/lib/libpam/modules/pam_login_access/pam_login_access.c 326219 2017-11-26 02:00:33Z pfg $ 39 */ 40 41 #define _BSD_SOURCE 42 43 #include <sys/param.h> 44 45 #include <syslog.h> 46 #include <unistd.h> 47 48 #define PAM_SM_ACCOUNT 49 50 #include <security/pam_appl.h> 51 #include <security/pam_modules.h> 52 #include <security/pam_mod_misc.h> 53 54 #include "pam_login_access.h" 55 56 PAM_EXTERN int 57 pam_sm_acct_mgmt(pam_handle_t *pamh, int flags __unused, 58 int argc __unused, const char *argv[] __unused) 59 { 60 const void *rhost, *tty, *user; 61 char hostname[MAXHOSTNAMELEN]; 62 int pam_err; 63 64 pam_err = pam_get_item(pamh, PAM_USER, &user); 65 if (pam_err != PAM_SUCCESS) 66 return (pam_err); 67 68 if (user == NULL) 69 return (PAM_SERVICE_ERR); 70 71 PAM_LOG("Got user: %s", (const char *)user); 72 73 pam_err = pam_get_item(pamh, PAM_RHOST, &rhost); 74 if (pam_err != PAM_SUCCESS) 75 return (pam_err); 76 77 pam_err = pam_get_item(pamh, PAM_TTY, &tty); 78 if (pam_err != PAM_SUCCESS) 79 return (pam_err); 80 81 gethostname(hostname, sizeof hostname); 82 83 if (rhost != NULL && *(const char *)rhost != '\0') { 84 PAM_LOG("Checking login.access for user %s from host %s", 85 (const char *)user, (const char *)rhost); 86 if (login_access(user, rhost) != 0) 87 return (PAM_SUCCESS); 88 PAM_VERBOSE_ERROR("%s is not allowed to log in from %s", 89 (const char *)user, (const char *)rhost); 90 } else if (tty != NULL && *(const char *)tty != '\0') { 91 PAM_LOG("Checking login.access for user %s on tty %s", 92 (const char *)user, (const char *)tty); 93 if (login_access(user, tty) != 0) 94 return (PAM_SUCCESS); 95 PAM_VERBOSE_ERROR("%s is not allowed to log in on %s", 96 (const char *)user, (const char *)tty); 97 } else { 98 PAM_LOG("Checking login.access for user %s", 99 (const char *)user); 100 if (login_access(user, "***unknown***") != 0) 101 return (PAM_SUCCESS); 102 PAM_VERBOSE_ERROR("%s is not allowed to log in", 103 (const char *)user); 104 } 105 106 return (PAM_AUTH_ERR); 107 } 108 109 PAM_MODULE_ENTRY("pam_login_access"); 110