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#!/usr/local/bin/php-cgi -f
<?php
/*
* openvpn.auth-user.php
*
* part of pfSense (https://www.pfsense.org)
* Copyright (c) 2008 Shrew Soft Inc
* Copyright (c) 2008-2016 Electric Sheep Fencing, LLC
* All rights reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/*
* OpenVPN calls this script to authenticate a user
* based on a username and password. We lookup these
* in our config.xml file and check the credentials.
*/
require_once("globals.inc");
require_once("config.inc");
require_once("radius.inc");
require_once("auth.inc");
require_once("interfaces.inc");
/**
* Get the NAS-Identifier
*
* We will return "openVPN" so that connections can be distinguished by the Radius
*/
if (!function_exists("getNasID")) {
function getNasID() {
return "openVPN";
}
}
/**
* Get the NAS-IP-Address based on the current wan address
*
* Use functions in interfaces.inc to find this out
*
*/
if (!function_exists("getNasIP")) {
function getNasIP() {
$nasIp = get_interface_ip();
if (!$nasIp) {
$nasIp = "0.0.0.0";
}
return $nasIp;
}
}
/**
* Set the NAS-Port-Type
*
* Should be "Virtual" since that denotes VPN connections
*/
if (!function_exists("getNasPortType")) {
function getNasPortType() {
return RADIUS_VIRTUAL;
}
}
/**
* Set the NAS-Port
*
* We will return the port the client connected to
*/
if (!function_exists("getNasPort")) {
function getNasPort() {
return $_GET['nas_port'];
}
}
/**
* Set the Called-Station-ID
*
* We will return the IP and port the client connected to
*/
if (!function_exists("getCalledStationId")) {
function getCalledStationId() {
return get_interface_ip() . ":" . getNasPort();
}
}
/* setup syslog logging */
openlog("openvpn", LOG_ODELAY, LOG_AUTH);
if (isset($_GET['username'])) {
$authmodes = explode(",", $_GET['authcfg']);
/* Any string retrieved through $_GET is automatically urlDecoded */
$username = base64_decode($_GET['username']);
$password = base64_decode($_GET['password']);
$common_name = $_GET['cn'];
$modeid = $_GET['modeid'];
$strictusercn = $_GET['strictcn'] == "false" ? false : true;
} else {
/* read data from environment */
$username = getenv("username");
$password = getenv("password");
$common_name = getenv("common_name");
}
if (!$username || !$password) {
syslog(LOG_ERR, "invalid user authentication environment");
if (isset($_GET['username'])) {
echo "FAILED";
closelog();
return;
} else {
closelog();
return (-1);
}
}
/* Replaced by a sed with proper variables used below(ldap parameters). */
//<template>
if (file_exists("{$g['varetc_path']}/openvpn/{$modeid}.ca")) {
putenv("LDAPTLS_CACERT={$g['varetc_path']}/openvpn/{$modeid}.ca");
putenv("LDAPTLS_REQCERT=never");
}
$authenticated = false;
if (($strictusercn === true) && (mb_strtolower($common_name) !== mb_strtolower($username))) {
syslog(LOG_WARNING, "Username does not match certificate common name ({$username} != {$common_name}), access denied.\n");
if (isset($_GET['username'])) {
echo "FAILED";
closelog();
return;
} else {
closelog();
return (1);
}
}
if (!is_array($authmodes)) {
syslog(LOG_WARNING, "No authentication server has been selected to authenticate against. Denying authentication for user {$username}");
if (isset($_GET['username'])) {
echo "FAILED";
closelog();
return;
} else {
closelog();
return (1);
}
}
$attributes = array();
foreach ($authmodes as $authmode) {
$authcfg = auth_get_authserver($authmode);
if (!$authcfg && $authmode != "Local Database") {
continue;
}
$authenticated = authenticate_user($username, $password, $authcfg, $attributes);
if ($authenticated == true) {
break;
}
}
if ($authenticated == false) {
syslog(LOG_WARNING, "user '{$username}' could not authenticate.\n");
if (isset($_GET['username'])) {
echo "FAILED";
closelog();
return;
} else {
closelog();
return (-1);
}
}
if (file_exists("/etc/inc/openvpn.attributes.php")) {
include_once("/etc/inc/openvpn.attributes.php");
}
$content = "";
if (is_array($attributes['dns-servers'])) {
foreach ($attributes['dns-servers'] as $dnssrv) {
if (is_ipaddr($dnssrv)) {
$content .= "push \"dhcp-option DNS {$dnssrv}\"\n";
}
}
}
if (is_array($attributes['routes'])) {
foreach ($attributes['routes'] as $route) {
$content .= "push \"route {$route} vpn_gateway\"\n";
}
}
if (isset($attributes['framed_ip'])) {
if (isset($attributes['framed_mask'])) {
$content .= "topology subnet\n";
$content .= "ifconfig-push {$attributes['framed_ip']} {$attributes['framed_mask']}";
} else {
$content .= "topology net30\n";
$content .= "ifconfig-push {$attributes['framed_ip']} ". long2ip((ip2long($attributes['framed_ip']) - 1));
}
}
if (!empty($content)) {
@file_put_contents("{$g['tmp_path']}/{$username}", $content);
}
syslog(LOG_NOTICE, "user '{$username}' authenticated\n");
closelog();
if (isset($_GET['username'])) {
echo "OK";
} else {
return (0);
}
?>
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