pfSense

#!/usr/local/bin/php-cgi -f

/*

	openvpn.tls-verify.php

	Copyright (c) 2011-2016 Electric Sheep Fencing, LLC.

	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

	   the documentation and/or other materials provided with the

	   distribution.

	   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 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 */

	$cert_subject = urldecode($_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);

*/

/* 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");

		closelog();

		return;

	} else {

		closelog();

		exit(1);

	}

// Debug

?>