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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.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:
1. Redistributions of source code must retain the above copyright notice,
this list of conditions and the following disclaimer.
2. Redistributions in binary form must reproduce the above copyright
notice, this list of conditions and the following disclaimer in
the documentation and/or other materials provided with the
distribution.
3. All advertising materials mentioning features or use of this software
must display the following acknowledgment:
"This product includes software developed by the pfSense Project
for use in the pfSense® software distribution. (http://www.pfsense.org/).
4. The names "pfSense" and "pfSense Project" must not be used to
endorse or promote products derived from this software without
prior written permission. For written permission, please contact
coreteam@pfsense.org.
5. Products derived from this software may not be called "pfSense"
nor may "pfSense" appear in their names without prior written
permission of the Electric Sheep Fencing, LLC.
6. Redistributions of any form whatsoever must retain the following
acknowledgment:
"This product includes software developed by the pfSense Project
for use in the pfSense software distribution (http://www.pfsense.org/).
THIS SOFTWARE IS PROVIDED BY THE pfSense PROJECT ``AS IS'' AND ANY
EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE pfSense PROJECT OR
ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
OF THE POSSIBILITY OF SUCH DAMAGE.
*/
/*
* 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 use our local hostname to make up the nas_id
*/
if (!function_exists("getNasID")) {
function getNasID() {
global $g;
$nasId = gethostname();
if (empty($nasId)) {
$nasId = $g['product_name'];
}
return $nasId;
}
}
/**
* 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 $nasIp;
}
}
/* setup syslog logging */
openlog("openvpn", LOG_ODELAY, LOG_AUTH);
if (isset($_GET['username'])) {
$authmodes = explode(",", $_GET['authcfg']);
$username = base64_decode(str_replace('%3D', '=', $_GET['username']));
$password = base64_decode(str_replace('%3D', '=', $_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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