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#!/usr/local/bin/php-cgi -f
<?php
/*
* openvpn.tls-verify.php
*
* part of pfSense (https://www.pfsense.org)
* Copyright (c) 2011-2016 Rubicon Communications, LLC (Netgate)
* 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 validate a certificate
* This script is called ONCE per DEPTH of the certificate chain
* Normal operation would have two runs - one for the server certificate
* and one for the client certificate. Beyond that, you're dealing with
* intermediates.
*/
require_once("globals.inc");
require_once("config.inc");
require_once("interfaces.inc");
openlog("openvpn", LOG_ODELAY, LOG_AUTH);
/* read data from command line */
if (isset($_GET['certdepth'])) {
$cert_depth = $_GET['certdepth'];
$cert_subject = urldecode($_GET['certsubject']);
$allowed_depth = $_GET['depth'];
$server_cn = $_GET['servercn'];
} else {
$cert_depth = intval($argv[1]);
$cert_subject = $argv[2];
}
/* Reserved for future use in case we decide to verify CNs and such as well
$subj = explode("/", $cert_subject);
foreach ($subj at $s) {
list($n, $v) = explode("=", $s);
if ($n == "CN") {
$common_name = $v;
}
}
*/
/* Replaced by sed with proper variables used below ( $server_cn and $allowed_depth ). */
//<template>
if (isset($allowed_depth) && ($cert_depth > $allowed_depth)) {
syslog(LOG_WARNING, "Certificate depth {$cert_depth} exceeded max allowed depth of {$allowed_depth}.\n");
if (isset($_GET['certdepth'])) {
echo "FAILED";
closelog();
return;
} else {
closelog();
exit(1);
}
}
// Debug
//syslog(LOG_WARNING, "Found certificate {$argv[2]} with depth {$cert_depth}\n");
closelog();
if (isset($_GET['certdepth'])) {
echo "OK";
} else {
exit(0);
}
?>
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