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<?php
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/* $Id$ */
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/*
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$RCSfile$
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Copyright (C) 2006 Fernando Lemos
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All rights reserved.
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Copyright (C) 2005 Peter Allgeyer <allgeyer_AT_web.de>
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All rights reserved.
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Copyright (C) 2004 Peter Curran (peter@closeconsultants.com).
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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 notices,
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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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notices, this list of conditions and the following disclaimer in the
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documentation and/or other materials provided with the distribution.
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THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
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INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
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AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
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OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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CONTRACT, 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 OF THE
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POSSIBILITY OF SUCH DAMAGE.
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*/
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require_once('config.inc');
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require_once('util.inc');
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// Return the list of ciphers OpenVPN supports
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function openvpn_get_ciphers($pkg) {
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foreach ($pkg['fields']['field'] as $i => $field) {
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if ($field['fieldname'] == 'crypto') break;
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}
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$option_array = &$pkg['fields']['field'][$i]['options']['option'];
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$ciphers_out = shell_exec('openvpn --show-ciphers | grep "default key" | awk \'{print $1, "(" $2 "-" $3 ")";}\'');
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$ciphers = explode("\n", trim($ciphers_out));
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sort($ciphers);
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foreach ($ciphers as $cipher) {
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$value = explode(' ', $cipher);
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$value = $value[0];
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$option_array[] = array('value' => $value, 'name' => $cipher);
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}
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}
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function openvpn_validate_port($value, $name) {
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$value = trim($value);
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if (!empty($value) && !(is_numeric($value) && ($value > 0) && ($value < 65535)))
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return "The field '$name' must contain a valid port, ranging from 0 to 65535.";
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return false;
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}
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function openvpn_validate_cidr($value, $name) {
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$value = trim($value);
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if (!empty($value)) {
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list($ip, $mask) = explode('/', $value);
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if (!is_ipaddr($ip) or !is_numeric($mask) or ($mask > 32) or ($mask < 0))
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return "The field '$name' must contain a valid CIDR range.";
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}
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return false;
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}
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// Do the input validation
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function openvpn_validate_input($mode, $post, $input_errors) {
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$Mode = ucfirst($mode);
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if ($mode == 'server') {
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if ($result = openvpn_validate_port($post['local_port'], 'Local port'))
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$input_errors[] = $result;
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if ($result = openvpn_validate_cidr($post['addresspool'], 'Address pool'))
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$input_errors[] = $result;
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if ($result = openvpn_validate_cidr($post['local_network'], 'Local network'))
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$input_errors[] = $result;
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}
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else { // Client mode
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if ($result = openvpn_validate_port($post['serverport'], 'Server port'))
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$input_errors[] = $result;
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$server_addr = trim($post['serveraddr']);
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if (!empty($value) && !(is_domain($server_addr) || is_ipaddr($server_addr)))
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$input_errors[] = 'The field \'Server address\' must contain a valid IP address or domain name.';
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if ($result = openvpn_validate_cidr($post['interface_ip'], 'Interface IP'))
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$input_errors[] = $result;
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if ($post['auth_method'] == 'shared_key') {
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if (empty($post['interface_ip']))
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$input_errors[] = 'The field \'Interface IP\' is required.';
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}
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if (isset($post['proxy_hostname']) && $post['proxy_hostname'] != "") {
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if (!is_domain($post['proxy_hostname']) || is_ipaddr($post['proxy_hostname']))
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$input_errors[] = 'The field \'Proxy Host\' must contain a valid IP address or domain name.';
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if (!is_port($post['proxy_port']))
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$input_errors[] = 'The field \'Proxy port\' must contain a valid port number.';
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if ($post['protocol'] != "TCP")
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$input_errors[] = 'The protocol must be TCP to use a HTTP proxy server.';
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}
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}
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if ($result = openvpn_validate_cidr($post['remote_network'], 'Remote network'))
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$input_errors[] = $result;
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if ($_POST['auth_method'] == 'shared_key') {
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$reqfields[] = 'shared_key';
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$reqfieldsn[] = 'Shared key';
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}
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else {
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$req = explode(' ', "ca_cert {$mode}_cert {$mode}_key");
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$reqn = array( 'CA certificate',
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ucfirst($mode) . ' certificate',
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ucfirst($mode) . ' key');
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$reqfields = array_merge($reqfields, $req);
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$reqfieldsn = array_merge($reqfieldsn, $reqn);
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if ($mode == 'server') {
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$reqfields[] = 'dh_params';
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$reqfieldsn[] = 'DH parameters';
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}
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}
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do_input_validation($post, $reqfields, $reqfieldsn, &$input_errors);
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$value = trim($post['shared_key']);
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$items = array();
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if ($_POST['auth_method'] == 'shared_key') {
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$items[] = array( 'field' => 'shared_key',
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'string' => 'OpenVPN Static key V1',
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'name' => 'Shared key');
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}
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else {
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$items[] = array( 'field' => 'ca_cert',
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'string' => 'CERTIFICATE',
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'name' => 'CA certificate');
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$items[] = array( 'field' => "{$mode}_cert",
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'string' => 'CERTIFICATE',
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'name' => "$Mode certificate");
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$items[] = array( 'field' => "{$mode}_key",
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'string' => 'RSA PRIVATE KEY',
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'name' => "$Mode key");
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if ($mode == 'server') {
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$items[] = array( 'field' => 'dh_params',
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'string' => 'DH PARAMETERS',
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'name' => 'DH parameters');
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$items[] = array( 'field' => 'crl',
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'string' => 'X509 CRL',
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'name' => 'CRL');
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}
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}
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foreach ($items as $item) {
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$value = trim($_POST[$item['field']]);
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$string = $item['string'];
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if ($value && (!strstr($value, "-----BEGIN {$string}-----") || !strstr($value, "-----END {$string}-----")))
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$input_errors[] = "The field '{$item['name']}' does not appear to be valid";
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}
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}
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function openvpn_validate_input_csc($post, $input_errors) {
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if ($result = openvpn_validate_cidr($post['ifconfig_push'], 'Interface IP'))
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$input_errors[] = $result;
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}
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// Rewrite the settings
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function openvpn_reconfigure($mode, $id) {
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global $g, $config;
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$settings = $config['installedpackages']["openvpn$mode"]['config'][$id];
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if ($settings['disable']) return;
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// Set the keys up
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// Note that the keys' extension is also the directive that goes to the config file
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$base_file = $g['varetc_path'] . "/openvpn_{$mode}{$id}.";
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$keys = array();
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if ($settings['auth_method'] == 'shared_key')
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$keys[] = array('field' => 'shared_key', 'ext' => 'secret', 'directive' => 'secret');
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else {
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$keys[] = array('field' => 'ca_cert', 'ext' => 'ca', 'directive' => 'ca');
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$keys[] = array('field' => "{$mode}_cert", 'ext' => 'cert', 'directive' => 'cert');
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$keys[] = array('field' => "{$mode}_key", 'ext' => 'key', 'directive' => 'key');
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if ($mode == 'server')
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$keys[] = array('field' => 'dh_params', 'ext' => 'dh', 'directive' => 'dh');
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if ($settings['crl'])
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$keys[] = array('field' => 'crl', 'ext' => 'crl', 'directive' => 'crl-verify');
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}
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foreach($keys as $key) {
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$filename = $base_file . $key['ext'];
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file_put_contents($filename, base64_decode($settings[$key['field']]));
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chown($filename, 'nobody');
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chgrp($filename, 'nobody');
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}
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$pidfile = $g['varrun_path'] . "/openvpn_{$mode}{$id}.pid";
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$proto = ($settings['protocol'] == 'UDP' ? 'udp' : "tcp-{$mode}");
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$cipher = $settings['crypto'];
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$openvpn_conf = <<<EOD
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writepid $pidfile
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#user nobody
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#group nobody
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daemon
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keepalive 10 60
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ping-timer-rem
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persist-tun
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persist-key
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dev tun
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proto $proto
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cipher $cipher
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EOD;
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// Mode-specific stuff
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if ($mode == 'server') {
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list($ip, $mask) = explode('/', $settings['addresspool']);
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$mask = gen_subnet_mask($mask);
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// Using a shared key or not dynamically assigning IPs to the clients
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if (($settings['auth_method'] == 'shared_key') || ($settings['nopool'] == 'on')) {
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if ($settings['auth_method'] == 'pki') $openvpn_conf .= "tls-server\n";
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$baselong = ip2long($ip) & ip2long($mask);
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$ip1 = long2ip($baselong + 1);
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$ip2 = long2ip($baselong + 2);
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$openvpn_conf .= "ifconfig $ip1 $ip2\n";
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}
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// Using a PKI
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else if ($settings['auth_method'] == 'pki') {
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if ($settings['client2client']) $openvpn_conf .= "client-to-client\n";
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$openvpn_conf .= "server $ip $mask\n";
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$csc_dir = "{$g['varetc_path']}/openvpn_csc";
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$openvpn_conf .= "client-config-dir $csc_dir\n";
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}
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// We can push routes
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if (!empty($settings['local_network'])) {
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list($ip, $mask) = explode('/', $settings['local_network']);
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$mask = gen_subnet_mask($mask);
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$openvpn_conf .= "push \"route $ip $mask\"\n";
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}
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// The port we'll listen at
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$openvpn_conf .= "lport {$settings['local_port']}\n";
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}
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else { // $mode == client
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// The remote server
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$openvpn_conf .= "remote {$settings['serveraddr']} {$settings['serverport']}\n";
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if ($settings['auth_method'] == 'pki') $openvpn_conf .= "client\n";
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if (!empty($settings['interface_ip'])) {
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// Configure the IPs according to the address pool
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list($ip, $mask) = explode('/', $settings['interface_ip']);
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$mask = gen_subnet_mask($mask);
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$baselong = ip2long($ip) & ip2long($mask);
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$ip1 = long2ip($baselong + 1);
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$ip2 = long2ip($baselong + 2);
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$openvpn_conf .= "ifconfig $ip2 $ip1\n";
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}
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if (isset($settings['proxy_hostname']) && $settings['proxy_hostname'] != "") {
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/* ;http-proxy-retry # retry on connection failures */
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$openvpn_conf .= "http-proxy {$settings['proxy_hostname']} {$settings['proxy_port']}\n";
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}
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}
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// Add the routes if they're set
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if (!empty($settings['remote_network'])) {
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list($ip, $mask) = explode('/', $settings['remote_network']);
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$mask = gen_subnet_mask($mask);
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$openvpn_conf .= "route $ip $mask\n";
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}
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286
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// Write the settings for the keys
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foreach ($keys as $key)
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$openvpn_conf .= $key['directive'] . ' ' . $base_file . $key['ext'] . "\n";
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290
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if ($settings['use_lzo']) $openvpn_conf .= "comp-lzo\n";
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if ($settings['dynamic_ip']) {
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$openvpn_conf .= "persist-remote-ip\n";
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$openvpn_conf .= "float\n";
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}
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297
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if (!empty($settings['custom_options'])) {
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$options = explode(';', $settings['custom_options']);
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300
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if (is_array($options)) {
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foreach ($options as $option)
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$openvpn_conf .= "$option\n";
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}
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else {
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$openvpn_conf .= "{$settings['custom_options']}\n";
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}
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307
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}
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308
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309
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file_put_contents($g['varetc_path'] . "/openvpn_{$mode}{$id}.conf", $openvpn_conf);
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310
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}
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311
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312
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313
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function openvpn_resync_csc($id) {
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314
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global $g, $config;
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315
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316
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$settings = $config['installedpackages']['openvpncsc']['config'][$id];
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317
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318
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if ($settings['disable'] == 'on') return;
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319
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320
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$conf = '';
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321
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if ($settings['block'] == 'on') $conf .= "disable\n";
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if ($settings['push_reset'] == 'on') $conf .= "push-reset\n";
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if (!empty($settings['ifconfig_push'])) {
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list($ip, $mask) = explode('/', $settings['ifconfig_push']);
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$baselong = ip2long($ip) & gen_subnet_mask_long($mask);
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$conf .= 'ifconfig-push ' . long2ip($baselong + 1) . ' ' . long2ip($baselong + 2) . "\n";
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}
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328
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if (!empty($settings['custom_options'])) {
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$options = explode(';', $settings['custom_options']);
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if (is_array($options)) {
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foreach ($options as $option)
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$conf .= "$option\n";
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}
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else {
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$conf .= "{$settings['custom_options']}\n";
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336
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}
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337
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}
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338
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339
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openvpn_create_cscdir();
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340
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$filename = "{$g['varetc_path']}/openvpn_csc/{$settings['commonname']}";
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341
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file_put_contents($filename, $conf);
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342
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chown($filename, 'nobody');
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343
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chgrp($filename, 'nogroup');
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344
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}
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345
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347
|
function openvpn_restart($mode, $id) {
|
|
348
|
global $g, $config;
|
|
349
|
|
|
350
|
$pidfile = $g['varrun_path'] . "/openvpn_{$mode}{$id}.pid";
|
|
351
|
killbypid($pidfile);
|
|
352
|
sleep(2);
|
|
353
|
|
|
354
|
$settings = $config['installedpackages']["openvpn$mode"]['config'][$id];
|
|
355
|
if ($settings['disable']) return;
|
|
356
|
|
|
357
|
$configfile = $g['varetc_path'] . "/openvpn_{$mode}{$id}.conf";
|
|
358
|
mwexec("openvpn --down \"touch /tmp/filter_dirty\" --ipchange \"touch /tmp/filter_dirty\" --learn-address \"touch /tmp/filter_dirty\" --route-up \"touch /tmp/filter_dirty\" --up touch \"/tmp/filter_dirty\" --config $configfile");
|
|
359
|
touch("{$g['tmp_path']}/filter_dirty");
|
|
360
|
}
|
|
361
|
|
|
362
|
|
|
363
|
// Resync the configuration and restart the VPN
|
|
364
|
function openvpn_resync($mode, $id) {
|
|
365
|
openvpn_reconfigure($mode, $id);
|
|
366
|
openvpn_restart($mode, $id);
|
|
367
|
}
|
|
368
|
|
|
369
|
function openvpn_create_cscdir() {
|
|
370
|
global $g;
|
|
371
|
|
|
372
|
$csc_dir = "{$g['varetc_path']}/openvpn_csc";
|
|
373
|
if (!is_dir($csc_dir)) {
|
|
374
|
mkdir($csc_dir);
|
|
375
|
chown($csc_dir, 'nobody');
|
|
376
|
chgrp($csc_dir, 'nobody');
|
|
377
|
}
|
|
378
|
}
|
|
379
|
|
|
380
|
// Resync and restart all VPNs
|
|
381
|
function openvpn_resync_all() {
|
|
382
|
global $config;
|
|
383
|
|
|
384
|
foreach (array('server', 'client') as $mode) {
|
|
385
|
if (is_array($config['installedpackages']["openvpn$mode"]['config'])) {
|
|
386
|
foreach ($config['installedpackages']["openvpn$mode"]['config'] as $id => $settings)
|
|
387
|
openvpn_resync($mode, $id);
|
|
388
|
}
|
|
389
|
}
|
|
390
|
|
|
391
|
openvpn_create_cscdir();
|
|
392
|
if (is_array($config['installedpackages']['openvpncsc']['config'])) {
|
|
393
|
foreach ($config['installedpackages']['openvpncsc']['config'] as $id => $csc)
|
|
394
|
openvpn_resync_csc($id);
|
|
395
|
}
|
|
396
|
}
|
|
397
|
|
|
398
|
|
|
399
|
function openvpn_print_javascript($mode) {
|
|
400
|
$javascript = <<<EOD
|
|
401
|
<script language="JavaScript">
|
|
402
|
<!--
|
|
403
|
function onAuthMethodChanged() {
|
|
404
|
var method = document.iform.auth_method;
|
|
405
|
var endis = (method.options[method.selectedIndex].value == 'shared_key');
|
|
406
|
|
|
407
|
document.iform.shared_key.disabled = !endis;
|
|
408
|
document.iform.ca_cert.disabled = endis;
|
|
409
|
document.iform.{$mode}_cert.disabled = endis;
|
|
410
|
document.iform.{$mode}_key.disabled = endis;
|
|
411
|
|
|
412
|
EOD;
|
|
413
|
if ($mode == 'server') {
|
|
414
|
$javascript .= <<<EOD
|
|
415
|
document.iform.dh_params.disabled = endis;
|
|
416
|
document.iform.crl.disabled = endis;
|
|
417
|
document.iform.nopool.disabled = endis;
|
|
418
|
document.iform.local_network.disabled = endis;
|
|
419
|
document.iform.client2client.disabled = endis;
|
|
420
|
|
|
421
|
EOD;
|
|
422
|
}
|
|
423
|
|
|
424
|
else { // Client mode
|
|
425
|
$javascript .= "\tdocument.iform.remote_network.disabled = !endis;\n";
|
|
426
|
}
|
|
427
|
|
|
428
|
$javascript .= <<<EOD
|
|
429
|
}
|
|
430
|
//-->
|
|
431
|
</script>
|
|
432
|
|
|
433
|
EOD;
|
|
434
|
print($javascript);
|
|
435
|
}
|
|
436
|
|
|
437
|
|
|
438
|
function openvpn_print_javascript2() {
|
|
439
|
$javascript = <<<EOD
|
|
440
|
<script language="JavaScript">
|
|
441
|
<!--
|
|
442
|
onAuthMethodChanged();
|
|
443
|
//-->
|
|
444
|
</script>
|
|
445
|
|
|
446
|
EOD;
|
|
447
|
print($javascript);
|
|
448
|
}
|
|
449
|
?>
|