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 39 #include <sys/cdefs.h> 40 #define _BSD_SOURCE 41 42 #include <sys/param.h> 43 #include <sys/types.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 #include <security/openpam.h> 54 55 #include "pam_login_access.h" 56 57 #define OPT_ACCESSFILE "accessfile" 58 #define OPT_NOAUDIT "noaudit" 59 #define OPT_FIELDSEP "fieldsep" 60 #define OPT_LISTSEP "listsep" 61 #define OPT_NODEFGROUP "nodefgroup" 62 63 #define _PATH_LOGACCESS "/etc/login.access" 64 #define _FIELD_SEPARATOR ":" 65 #define _LIST_SEPARATOR ", \t" 66 67 PAM_EXTERN int 68 pam_sm_acct_mgmt(pam_handle_t *pamh, int flags __unused, 69 int argc __unused, const char *argv[] __unused) 70 { 71 struct pam_login_access_options login_access_opts; 72 const void *rhost, *tty, *user; 73 char hostname[MAXHOSTNAMELEN]; 74 int pam_err; 75 76 pam_err = pam_get_item(pamh, PAM_USER, &user); 77 if (pam_err != PAM_SUCCESS) 78 return (pam_err); 79 80 if (user == NULL) 81 return (PAM_SERVICE_ERR); 82 83 PAM_LOG("Got user: %s", (const char *)user); 84 85 pam_err = pam_get_item(pamh, PAM_RHOST, &rhost); 86 if (pam_err != PAM_SUCCESS) 87 return (pam_err); 88 89 pam_err = pam_get_item(pamh, PAM_TTY, &tty); 90 if (pam_err != PAM_SUCCESS) 91 return (pam_err); 92 93 gethostname(hostname, sizeof hostname); 94 login_access_opts.defgroup = openpam_get_option(pamh, OPT_NODEFGROUP) == NULL ? true : false; 95 login_access_opts.audit = openpam_get_option(pamh, OPT_NOAUDIT) == NULL ? true : false; 96 if ((login_access_opts.accessfile = openpam_get_option(pamh, OPT_ACCESSFILE)) == NULL) 97 login_access_opts.accessfile = _PATH_LOGACCESS; 98 if ((login_access_opts.fieldsep = openpam_get_option(pamh, OPT_FIELDSEP)) == NULL) 99 login_access_opts.fieldsep = _FIELD_SEPARATOR; 100 if ((login_access_opts.listsep = openpam_get_option(pamh, OPT_LISTSEP)) == NULL) 101 login_access_opts.listsep = _LIST_SEPARATOR; 102 103 if (rhost != NULL && *(const char *)rhost != '\0') { 104 PAM_LOG("Checking login.access for user %s from host %s", 105 (const char *)user, (const char *)rhost); 106 if (login_access(user, rhost, &login_access_opts) != 0) 107 return (PAM_SUCCESS); 108 PAM_VERBOSE_ERROR("%s is not allowed to log in from %s", 109 (const char *)user, (const char *)rhost); 110 } else if (tty != NULL && *(const char *)tty != '\0') { 111 PAM_LOG("Checking login.access for user %s on tty %s", 112 (const char *)user, (const char *)tty); 113 if (login_access(user, tty, &login_access_opts) != 0) 114 return (PAM_SUCCESS); 115 PAM_VERBOSE_ERROR("%s is not allowed to log in on %s", 116 (const char *)user, (const char *)tty); 117 } else { 118 PAM_LOG("Checking login.access for user %s", 119 (const char *)user); 120 if (login_access(user, "***unknown***", &login_access_opts) != 0) 121 return (PAM_SUCCESS); 122 PAM_VERBOSE_ERROR("%s is not allowed to log in", 123 (const char *)user); 124 } 125 126 return (PAM_AUTH_ERR); 127 } 128 129 PAM_MODULE_ENTRY("pam_login_access"); 130