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#!/usr/local/bin/php-cgi -f
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<?php
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/*
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openvpn.tls-verify.php
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part of pfSense (https://www.pfsense.org)
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Copyright (c) 2011-2016 Electric Sheep Fencing, LLC.
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All rights reserved.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions are met:
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1. Redistributions of source code must retain the above copyright notice,
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this list of conditions and the following disclaimer.
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2. Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in
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the documentation and/or other materials provided with the
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distribution.
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3. All advertising materials mentioning features or use of this software
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must display the following acknowledgment:
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"This product includes software developed by the pfSense Project
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for use in the pfSense® software distribution. (http://www.pfsense.org/).
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4. The names "pfSense" and "pfSense Project" must not be used to
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endorse or promote products derived from this software without
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prior written permission. For written permission, please contact
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coreteam@pfsense.org.
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5. Products derived from this software may not be called "pfSense"
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nor may "pfSense" appear in their names without prior written
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permission of the Electric Sheep Fencing, LLC.
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6. Redistributions of any form whatsoever must retain the following
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acknowledgment:
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"This product includes software developed by the pfSense Project
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for use in the pfSense software distribution (http://www.pfsense.org/).
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THIS SOFTWARE IS PROVIDED BY THE pfSense PROJECT ``AS IS'' AND ANY
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EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE pfSense PROJECT OR
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ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
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OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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* OpenVPN calls this script to validate a certificate
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* This script is called ONCE per DEPTH of the certificate chain
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* Normal operation would have two runs - one for the server certificate
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* and one for the client certificate. Beyond that, you're dealing with
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* intermediates.
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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("interfaces.inc");
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openlog("openvpn", LOG_ODELAY, LOG_AUTH);
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/* read data from command line */
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if (isset($_GET['certdepth'])) {
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$cert_depth = $_GET['certdepth'];
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$cert_subject = urldecode($_GET['certsubject']);
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$allowed_depth = $_GET['depth'];
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$server_cn = $_GET['servercn'];
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} else {
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$cert_depth = intval($argv[1]);
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$cert_subject = $argv[2];
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}
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/* Reserved for future use in case we decide to verify CNs and such as well
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$subj = explode("/", $cert_subject);
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foreach ($subj at $s) {
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list($n, $v) = explode("=", $s);
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if ($n == "CN") {
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$common_name = $v;
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}
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}
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*/
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/* Replaced by sed with proper variables used below ( $server_cn and $allowed_depth ). */
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//<template>
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if (isset($allowed_depth) && ($cert_depth > $allowed_depth)) {
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syslog(LOG_WARNING, "Certificate depth {$cert_depth} exceeded max allowed depth of {$allowed_depth}.\n");
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if (isset($_GET['certdepth'])) {
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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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// Debug
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//syslog(LOG_WARNING, "Found certificate {$argv[2]} with depth {$cert_depth}\n");
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closelog();
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if (isset($_GET['certdepth'])) {
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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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