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#!/usr/local/bin/php-cgi -f
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<?php
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/*
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* ipsec.auth-user.php
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*
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* part of pfSense (https://www.pfsense.org)
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* Copyright (c) 2008 Shrew Soft Inc
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* Copyright (c) 2008-2013 BSD Perimeter
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* Copyright (c) 2013-2016 Electric Sheep Fencing
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* Copyright (c) 2014-2022 Rubicon Communications, LLC (Netgate)
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* All rights reserved.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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/*
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* ipsec calls this script to authenticate a user
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* based on a username and password. We lookup these
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* in our config.xml file and check the credentials.
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*/
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require_once("globals.inc");
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require_once("config.inc");
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require_once("auth.inc");
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require_once("interfaces.inc");
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global $config;
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/* setup syslog logging */
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openlog("charon", LOG_ODELAY, LOG_AUTH);
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if (isset($_GET['username'])) {
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$authmodes = explode(",", $_GET['authcfg']);
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$username = $_GET['username'];
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$password = $_GET['password'];
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$common_name = $_GET['cn'];
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} else {
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/* read data from environment */
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$username = getenv("username");
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$password = getenv("password");
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$common_name = getenv("common_name");
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$authmodes = explode(",", getenv("authcfg"));
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}
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if (!$username) {
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syslog(LOG_ERR, "invalid user authentication environment");
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if (isset($_GET['username'])) {
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echo "FAILED";
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closelog();
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return;
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} else {
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closelog();
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exit (-1);
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}
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}
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$authenticated = false;
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if (($strictusercn === true) && ($common_name != $username)) {
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syslog(LOG_WARNING, "Username does not match certificate common name ({$username} != {$common_name}), access denied.");
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if (isset($_GET['username'])) {
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echo "FAILED";
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closelog();
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return;
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} else {
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closelog();
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exit (1);
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}
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}
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$attributes = array("nas_identifier" => "xauthIPsec");
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if (($config['ipsec']['client']['group_source'] == 'enabled') &&
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!empty($config['ipsec']['client']['auth_groups'])) {
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$ipsec_groups = explode(",", ($config['ipsec']['client']['auth_groups']));
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} else {
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$ipsec_groups = '';
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}
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foreach ($authmodes as $authmode) {
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$authcfg = auth_get_authserver($authmode);
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if (!$authcfg && $authmode != "Local Database") {
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continue;
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}
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$authenticated = authenticate_user($username, $password, $authcfg, $attributes);
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if ($authenticated == true) {
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$userGroups = getUserGroups($username, $authcfg, $attributes);
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if ($authmode == "Local Database") {
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$user = getUserEntry($username);
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if (!is_array($user) || !userHasPrivilege($user, "user-ipsec-xauth-dialin") ||
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(!empty($ipsec_groups) && (count(array_intersect($userGroups, $ipsec_groups)) == 0))) {
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$authenticated = false;
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syslog(LOG_WARNING, "user '{$username}' cannot authenticate through IPsec since the required privileges are missing.");
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continue;
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}
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}
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break;
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}
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}
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if ($authenticated == false) {
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syslog(LOG_WARNING, "user '{$username}' could not authenticate.");
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if (isset($_GET['username'])) {
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echo "FAILED";
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closelog();
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return;
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} else {
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closelog();
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exit (-1);
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}
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}
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if (file_exists("/etc/inc/ipsec.attributes.php")) {
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include_once("/etc/inc/ipsec.attributes.php");
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}
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syslog(LOG_NOTICE, "user '{$username}' authenticated");
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closelog();
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if (isset($_GET['username'])) {
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echo "OK";
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} else {
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exit (0);
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}
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?>
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