pfSense

<?php

/*

 * copyget.inc

 *

 * part of pfSense (https://www.pfsense.org)

 * Copyright (c) 2004-2013 BSD Perimeter

 * Copyright (c) 2013-2016 Electric Sheep Fencing

 * Copyright (c) 2014-2020 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.

 */

/*

	Provides the functionality required to fetch updated copyright information from Netgate

*/

require_once("guiconfig.inc");

$copyrightfile = "{$g['cf_conf_path']}/copyright";

$tmpfile = "{$g['cf_conf_path']}/copyright.tmp";

$idfile = "/var/db/uniqueid";

$FQDN = "https://ews.netgate.com/copyright";

$refreshinterval = (24 * 3600);	// 24 hours

// Poll the Netgate server to obtain the JSON/HTML formatted support information

// and write it to the JSON file

function updatecopyright() {

	global $g, $copyrightfile, $tmpfile, $idfile, $FQDN;

	if (file_exists($idfile)) {

		if (function_exists('curl_version')) {

			$post = ['uid' => file_get_contents($idfile), 'language' => '0', 'edition' => 'community', 'version' => '1'];

			$url = $FQDN;

			$ch = curl_init();

			curl_setopt($ch, CURLOPT_HEADER, 0);

			curl_setopt($ch, CURLOPT_VERBOSE, 0);

			curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);

			curl_setopt($ch, CURLOPT_USERAGENT, $g['product_name'] . '/' . $g['product_version']);

			curl_setopt($ch, CURLOPT_URL, $url);

			curl_setopt($ch, CURLOPT_POST, true);

			curl_setopt($ch, CURLOPT_POSTFIELDS, http_build_query($post));

			curl_setopt($ch, CURLOPT_CONNECTTIMEOUT ,4);

			$response = curl_exec($ch);

			$status = curl_getinfo($ch, CURLINFO_HTTP_CODE);

			curl_close($ch);

			if ($status == 200) {

				// Save to a temporary file

				file_put_contents($tmpfile, $response);

				// If the file contents are not the same as the existing file, create the trigger to display the new copyright

				if (!file_exists($copyrightfile) || !compare_copytext(file_get_contents($copyrightfile), $response)) {

					touch("{$g['cf_conf_path']}/copynotice_display");

				}

				rename($tmpfile, $copyrightfile);

			}

		}

	}

}

// Retrieve the copyright data from Netgate.com if

// the support data file does not exist, or

// if it is more than a day old and the URL seems resolvable

if (!file_exists($copyrightfile) ||

    ((time()-filemtime($copyrightfile) > $refreshinterval) && is_url_hostname_resolvable($FQDN))) {

	updateCopyright();

}

// Compare the copyright text contained in the first HTML <DIV>

function compare_copytext ($new, $old) {

	if ((strlen($new) > 0) && (strlen($old) > 0)) {

		$new_divend = strpos($new, "</div>");

		$old_divend = strpos($old, "</div>");

		if ($new_divend && $old_divend) {

			return(md5(substr($new, 0, $new_divend)) === md5(substr($old, 0, $old_divend)));

		}

	}

	return false;

}