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<?php
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/*
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* wg.inc
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*
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* part of pfSense (https://www.pfsense.org)
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* Copyright (c) 2021 Rubicon Communications, LLC (Netgate)
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* All rights reserved.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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require_once("globals.inc");
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require_once('config.inc');
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$wgbinpath = '/usr/local/bin/wg';
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// Gnerate a preshared key
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function gerneratePSK() {
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global $wgbinpath;
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return exec("{$wgbinpath} genpsk");
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}
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// Return the next available WireGuard port
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function next_wg_port() {
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global $config;
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init_config_arr(array('wireguard', 'tunnel'));
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$tunnels = &$config['wireguard']['tunnel'];
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for ($idx=51820; $idx<65535; $idx++) {
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// Check to see if the port is already in use
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$found = false;
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foreach ($tunnels as $tunnel) {
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if ($tunnel['interface']['listenport'] == $idx) {
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$found = true;
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break;
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}
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}
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// If not, it can be used
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if (!$found) {
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return $idx;
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}
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}
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return 51820;
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}
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// Return the next available WireGuard interface
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function next_wg_if() {
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global $config;
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init_config_arr(array('wireguard', 'tunnel'));
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$tunnels = &$config['wireguard']['tunnel'];
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$used_ifs = array();
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foreach ($tunnels as $tunnel) {
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$used_ifs[] = $tunnel['name'];
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}
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for ($ifnum = 0; $ifnum < 32768; $ifnum++) {
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$want_if = "wg{$ifnum}";
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if (!in_array($want_if, $used_ifs)) {
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return $want_if;
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}
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}
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return -1;
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}
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// Validate the user's input and return error messages if not acceptable
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function wg_validate_post($pconfig) {
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$input_errors = array();
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// Check the addresses
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$addrs = explode(",", $pconfig['interface']['address']);
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foreach ($addrs as $addr) {
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$addr = trim($addr);
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if (!is_subnet($addr)) {
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$input_errors[] = sprintf(gettext(
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'%1$s is not a valid CIDR address'), $addr);
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}
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$iflist = get_configured_interface_list_by_realif();
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$skip = '';
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if (!empty($iflist[$pconfig['name']])) {
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if (!isset($pconfig['enabled']) ||
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($pconfig['enabled'] != 'yes')) {
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$input_errors[] = gettext('Cannot disable a WireGuard instance while it is assigned as an interface.');
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}
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$skip = $iflist[$pconfig['name']];
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}
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$a = explode("/", $addr);
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$conflicts = where_is_ipaddr_configured($a[0], $skip, true,
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true, $a[1]);
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if (!empty($conflicts)) {
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foreach ($conflicts as $conflict) {
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$input_errors[] = sprintf(gettext(
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'%1$s is already configured on this ' .
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'firewall: %2$s (%3$s)'), $addr,
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strtoupper($conflict['if']),
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$conflict['ip_or_subnet']);
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}
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}
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}
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// Check listen port
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$lport = $pconfig['interface']['listenport'];
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if (!empty($lport) && (!ctype_digit($lport) || !is_port($lport))) {
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$input_errors[] = gettext("Invalid interface listen port.");
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}
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// Check keys
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if (empty($pconfig['interface']['privatekey'])) {
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$input_errors[] = gettext("Private key must be specified");
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}
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// Now the peers
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if (isset($pconfig['peers']['wgpeer'])) {
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$idx = 0;
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foreach ($pconfig['peers']['wgpeer'] as $peer) {
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$input_errors = array_merge($input_errors,
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wg_validate_peer($idx, $peer));
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$idx++;
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}
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}
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return $input_errors;
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}
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// Valildate a peer
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function wg_validate_peer($idx, $peer) {
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$input_errors = array();
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// Check remote port
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$rport = $peer['port'];
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if (!empty($rport) && (!ctype_digit($rport) || !is_port($rport))) {
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$input_errors[] = sprintf(gettext(
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'Peer %1$s: Invalid remote port. (%2$s)'), $idx, $rport);
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}
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// Check key
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if (empty($peer['publickey'])) {
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$input_errors[] = sprintf(gettext(
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'Peer %1$s: A public key must be specified'), $idx);
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}
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// Endpoint
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$ep = trim($peer['endpoint']);
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if (!empty($ep) && !is_hostname($ep) && !is_ipaddr($ep)) {
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$input_errors[] = sprintf(gettext(
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'Peer %1$s: Endpoint must be a valid IPv4 or IPv6 ' .
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'adress or hostname.'), $idx);
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}
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// Allowed IPs
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if (!empty($peer['allowedips'])) {
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foreach (explode(",", $peer['allowedips']) as $ip) {
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if (!is_subnet(trim($ip))) {
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$input_errors[] = sprintf(gettext(
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'Peer %1$s: Address %2$s is not a valid ' .
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'IPv4 or IPv6 CIDR subnet aadress.'),
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$idx, $ip);
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}
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}
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}
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return $input_errors;
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}
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// Setup all WireGuard tunnels
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function wg_configure() {
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global $config;
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if (!is_array($config["wireguard"]["tunnel"])) {
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return;
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}
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if (platform_booting()) {
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echo gettext("Configuring WireGuard Tunnels... ");
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}
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wg_create_config_files();
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foreach ($config["wireguard"]["tunnel"] as $tunnel) {
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if (isset($tunnel['enabled']) && $tunnel['enabled'] == 'yes') {
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wg_configure_if($tunnel['name']);
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} else {
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wg_destroy_if($tunnel['name']);
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}
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}
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if (platform_booting()) {
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echo gettext("done.") . "\n";
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}
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}
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// Setup WireGuard tunnel
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function wg_configure_if($wg_ifname) {
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global $config, $g;
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215
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if (!is_array($config["wireguard"]["tunnel"])) {
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return;
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}
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unset($tunnel);
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foreach ($config["wireguard"]["tunnel"] as $tun) {
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if (isset($tun['enabled']) && $tun['enabled'] == 'yes' &&
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$tun['name'] == $wg_ifname) {
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$tunnel = $tun;
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break;
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}
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}
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if (!is_array($tunnel)) {
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return;
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}
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232
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wg_destroy_if($tunnel['name']);
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//$if = pfSense_interface_create($tunnel['name']);
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$conf_path = $g["wg_conf_path"] . "/" . $tunnel['name'] . ".conf";
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/* XXX - workaround while pfSense-module is fixed */
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mwexec("/sbin/ifconfig " . escapeshellarg($tunnel['name']) . " create");
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238
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mwexec("/usr/local/bin/wg setconf " . escapeshellarg($tunnel['name']) .
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" " . escapeshellarg($conf_path));
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240
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$ip4_first = true;
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241
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$ip6_first = true;
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242
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foreach (explode(",", $tunnel['interface']['address']) as $addr) {
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243
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if (strstr($addr, "/") == false) {
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244
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continue;
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245
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}
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246
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list($ip, $mask) = explode("/", trim($addr));
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247
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if (is_ipaddrv4($ip)) {
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248
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mwexec("/sbin/ifconfig " .
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249
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escapeshellarg($tunnel['name']) . " inet " .
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250
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escapeshellarg($ip) . " netmask " .
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251
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escapeshellarg(gen_subnet_mask($mask)) .
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252
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($ip4_first ? "" : " alias"));
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253
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if ($ip4_first) {
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254
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file_put_contents("/tmp/{$tunnel['name']}_router", wg_find_tunnel_gw($tunnel, $addr));
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255
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}
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256
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$ip4_first = false;
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257
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} elseif (is_ipaddrv6($ip)) {
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258
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mwexec("/sbin/ifconfig " .
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259
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escapeshellarg($tunnel['name']) . " inet6 " .
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260
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escapeshellarg($ip) . " netmask " .
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261
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escapeshellarg(gen_subnet_mask($mask)) .
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262
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($ip6_first ? "" : " alias"));
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263
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if ($ip6_first) {
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264
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file_put_contents("/tmp/{$tunnel['name']}_routerv6", wg_find_tunnel_gw($tunnel, $addr));
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265
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}
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266
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$ip6_first = false;
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267
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}
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268
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}
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269
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|
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270
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system_routing_configure(
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271
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convert_real_interface_to_friendly_interface_name($wg_ifname));
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272
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273
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if (is_array($tunnel['peers']) && is_array($tunnel['peers']['wgpeer']) &&
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274
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count($tunnel['peers']['wgpeer']) > 0) {
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275
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foreach ($tunnel['peers']['wgpeer'] as $peer) {
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276
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if (!empty($peer['allowedips'])) {
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277
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foreach (explode(",", $peer['allowedips']) as $ip) {
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278
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$ip = trim($ip);
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279
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if (empty($ip) ||
|
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280
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($ip == '0.0.0.0/0') ||
|
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281
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($ip == '::/0')) {
|
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282
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continue;
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|
283
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}
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284
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route_add_or_change($ip, $tunnel['name'], $tunnel['name']);
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|
285
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}
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|
286
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}
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287
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}
|
|
288
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}
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|
289
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}
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|
290
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|
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291
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// Remove WireGuard tunnel
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292
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function wg_destroy_if($wg_ifname) {
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293
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return (pfSense_interface_destroy($wg_ifname));
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|
294
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}
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|
295
|
|
|
296
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// Generate private key
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|
297
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function genKeyPair($json = false) {
|
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298
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global $wgbinpath;
|
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299
|
|
|
300
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$privkey = exec("{$wgbinpath} genkey");
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|
301
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$pubkey = genPubKey($privkey);
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302
|
|
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303
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$res = array('privkey' => $privkey, 'pubkey' => $pubkey);
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304
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return $json ? json_encode($res) : $res;
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305
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}
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|
306
|
|
|
307
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// Compose the public key from a provided private key
|
|
308
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function genPubKey($privkey) {
|
|
309
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global $wgbinpath;
|
|
310
|
|
|
311
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return (exec("echo {$privkey} | {$wgbinpath} pubkey"));
|
|
312
|
}
|
|
313
|
|
|
314
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function deleteTunnel($tunidx) {
|
|
315
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global $config, $g;
|
|
316
|
|
|
317
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if ($config['wireguard']['tunnel'][$tunidx]) {
|
|
318
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unset($ifname);
|
|
319
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unset($conf_path);
|
|
320
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if (isset($config['wireguard']['tunnel'][$tunidx]['name'])) {
|
|
321
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$ifname =
|
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322
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$config['wireguard']['tunnel'][$tunidx]['name'];
|
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323
|
}
|
|
324
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if (isset($ifname)) {
|
|
325
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$conf_path = $g["wg_conf_path"] . "/" . $ifname .
|
|
326
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".conf";
|
|
327
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}
|
|
328
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// Delete the tunnel configuration entry
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|
329
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unset($config['wireguard']['tunnel'][$tunidx]);
|
|
330
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write_config("WireGuard tunnel {$index} updated.");
|
|
331
|
|
|
332
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// Delete the wg?.conf file
|
|
333
|
if (isset($conf_path) && is_file($conf_path)) {
|
|
334
|
unlink($conf_path);
|
|
335
|
}
|
|
336
|
|
|
337
|
// Destroy the deleted tunnel
|
|
338
|
wg_destroy_if($ifname);
|
|
339
|
}
|
|
340
|
}
|
|
341
|
|
|
342
|
// Write new tunnel values to the configuration system
|
|
343
|
function wg_do_post($post, $json = false) {
|
|
344
|
global $config;
|
|
345
|
|
|
346
|
init_config_arr(array('wireguard', 'tunnel'));
|
|
347
|
|
|
348
|
$input_errors = array();
|
|
349
|
|
|
350
|
$index = $post['index'];
|
|
351
|
|
|
352
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$pconfig = &$config['wireguard']['tunnel'][$index];
|
|
353
|
|
|
354
|
if (empty($pconfig['name'])) {
|
|
355
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$pconfig['name'] = next_wg_if();
|
|
356
|
}
|
|
357
|
$pconfig['enabled'] = empty($post['enabled']) ? 'no':'yes';
|
|
358
|
$pconfig['descr'] = $post['descr'];
|
|
359
|
|
|
360
|
// Interface section
|
|
361
|
$pconfig['interface']['address'] = $post['address'];
|
|
362
|
$pconfig['interface']['listenport'] = $post['listenport'];
|
|
363
|
$pconfig['interface']['privatekey'] = $post['privatekey'];
|
|
364
|
$pconfig['interface']['publickey'] = genPubKey($post['privatekey']);
|
|
365
|
|
|
366
|
if (isset($post['endpoint0'])) {
|
|
367
|
// Peers section
|
|
368
|
$pconfig['peers'] = array();
|
|
369
|
$pconfig['peers']['wgpeer'] = array();
|
|
370
|
|
|
371
|
$idx = 0;
|
|
372
|
|
|
373
|
for (;;) {
|
|
374
|
if (!$post['publickeyp'.$idx] &&
|
|
375
|
!$post['endpoint'.$idx] &&
|
|
376
|
!$post['allowedips'.$idx] &&
|
|
377
|
!$post['descr'.$idx] &&
|
|
378
|
!$post['persistentkeepalive'.$idx]) {
|
|
379
|
break;
|
|
380
|
}
|
|
381
|
|
|
382
|
$peer = array();
|
|
383
|
$peer['publickey'] = $post['publickeyp' . $idx];
|
|
384
|
$peer['endpoint'] = $post['endpoint' . $idx];
|
|
385
|
$peer['allowedips'] = $post['allowedips' . $idx];
|
|
386
|
$peer['descr'] = $post['descp' . $idx];
|
|
387
|
$peer['persistentkeepalive'] =
|
|
388
|
$post['persistentkeepalive' . $idx];
|
|
389
|
$peer['presharedkey'] = $post['presharedkey' . $idx];
|
|
390
|
$peer['port'] = $post['port' . $idx];
|
|
391
|
$peer['peerwgaddr'] = $post['peerwgaddr' . $idx];
|
|
392
|
|
|
393
|
$pconfig['peers']['wgpeer'][] = $peer;
|
|
394
|
$idx++;
|
|
395
|
}
|
|
396
|
} else {
|
|
397
|
unset($pconfig['peers']);
|
|
398
|
}
|
|
399
|
|
|
400
|
$input_errors = wg_validate_post($pconfig);
|
|
401
|
|
|
402
|
if (!$input_errors) {
|
|
403
|
$config['wireguard']['tunnel'][$index] = $pconfig;
|
|
404
|
write_config("WireGuard tunnel {$index} updated.");
|
|
405
|
}
|
|
406
|
|
|
407
|
return(array('input_errors' => $input_errors, 'pconfig' => $pconfig));
|
|
408
|
}
|
|
409
|
|
|
410
|
/*
|
|
411
|
* Read the WireGuard configurations from config.xml and create a number of
|
|
412
|
* *.conf files for wg-quick to read
|
|
413
|
*/
|
|
414
|
function wg_create_config_files($clean = true) {
|
|
415
|
global $config, $g;
|
|
416
|
|
|
417
|
if ($config["wireguard"]["tunnel"]) {
|
|
418
|
$wg_tunnels = $config["wireguard"]["tunnel"];
|
|
419
|
$cfgpath = $g["wg_conf_path"];
|
|
420
|
|
|
421
|
if (!file_exists($cfgpath)) {
|
|
422
|
mkdir($cfgpath, 0700, true);
|
|
423
|
} else {
|
|
424
|
chmod($cfgpath, 0700);
|
|
425
|
}
|
|
426
|
|
|
427
|
if ($clean) {
|
|
428
|
delete_wg_configs();
|
|
429
|
}
|
|
430
|
|
|
431
|
foreach ($wg_tunnels as $tunnel) {
|
|
432
|
if (!empty($tunnel['enabled']) &&
|
|
433
|
$tunnel['enabled'] == 'yes') {
|
|
434
|
make_wg_conf($tunnel);
|
|
435
|
}
|
|
436
|
}
|
|
437
|
}
|
|
438
|
}
|
|
439
|
|
|
440
|
// Write each file
|
|
441
|
function make_wg_conf($tunnel) {
|
|
442
|
global $g;
|
|
443
|
|
|
444
|
$txt = "# This WireGuard config file has been created automatically. " .
|
|
445
|
"Do not edit!\n";
|
|
446
|
|
|
447
|
$txt .= "# Description: {$tunnel['descr']}\n\n";
|
|
448
|
|
|
449
|
// Process Interfaces section
|
|
450
|
$txt .= "[Interface]\n";
|
|
451
|
|
|
452
|
if (!empty($tunnel["interface"]["privatekey"])) {
|
|
453
|
$txt .= "PrivateKey = {$tunnel["interface"]["privatekey"]}\n";
|
|
454
|
}
|
|
455
|
|
|
456
|
if (!empty($tunnel["interface"]["listenport"])) {
|
|
457
|
$txt .= "ListenPort = {$tunnel["interface"]["listenport"]}\n";
|
|
458
|
}
|
|
459
|
|
|
460
|
$txt .= "\n";
|
|
461
|
|
|
462
|
// Process peers section
|
|
463
|
if (is_array($tunnel['peers']) && is_array($tunnel['peers']['wgpeer']) &&
|
|
464
|
count($tunnel['peers']['wgpeer']) > 0) {
|
|
465
|
foreach ($tunnel['peers']['wgpeer'] as $peer) {
|
|
466
|
$txt .= "# Peer: {$peer['descr']}\n";
|
|
467
|
$txt .= "[Peer]\n";
|
|
468
|
|
|
469
|
if (!empty($peer["publickey"])) {
|
|
470
|
$txt .= "PublicKey = {$peer['publickey']}\n";
|
|
471
|
}
|
|
472
|
|
|
473
|
if (!empty($peer["endpoint"])) {
|
|
474
|
$txt .= "EndPoint = ";
|
|
475
|
$txt .= is_ipaddrv6($peer["endpoint"]) ? "[{$peer['endpoint']}]" : $peer['endpoint'];
|
|
476
|
$txt .= ":" . ((empty($peer["port"])) ? '51820' : $peer["port"]) . "\n";
|
|
477
|
}
|
|
478
|
|
|
479
|
if (!empty($peer["allowedips"])) {
|
|
480
|
$txt .= "AllowedIPs = {$peer['allowedips']}\n";
|
|
481
|
}
|
|
482
|
|
|
483
|
if (!empty($peer["persistentkeepalive"])) {
|
|
484
|
$txt .= "PersistentKeepalive = " .
|
|
485
|
"{$peer['persistentkeepalive']}\n";
|
|
486
|
}
|
|
487
|
|
|
488
|
if (!empty($peer["presharedkey"])) {
|
|
489
|
$txt .= "PresharedKey = " .
|
|
490
|
"{$peer['presharedkey']}\n";
|
|
491
|
}
|
|
492
|
|
|
493
|
$txt .= "\n";
|
|
494
|
}
|
|
495
|
}
|
|
496
|
|
|
497
|
file_put_contents($g["wg_conf_path"] . "/" . $tunnel['name'] . ".conf",
|
|
498
|
$txt);
|
|
499
|
chmod($g["wg_conf_path"] . "/" . $tunnel['name'] . ".conf", 0600);
|
|
500
|
}
|
|
501
|
|
|
502
|
// Remove all wg config files from the conf directory
|
|
503
|
function delete_wg_configs() {
|
|
504
|
global $g;
|
|
505
|
|
|
506
|
unlink_if_exists($g["wg_conf_path"] . "/*.conf");
|
|
507
|
}
|
|
508
|
|
|
509
|
/* Check if at least one tunnel is enabled */
|
|
510
|
function is_wg_enabled() {
|
|
511
|
global $config;
|
|
512
|
|
|
513
|
init_config_arr(array('wireguard', 'tunnel'));
|
|
514
|
|
|
515
|
foreach ($config['wireguard']['tunnel'] as $tunnel) {
|
|
516
|
if (empty($tunnel['enabled'])) {
|
|
517
|
continue;
|
|
518
|
}
|
|
519
|
return true;
|
|
520
|
}
|
|
521
|
|
|
522
|
return false;
|
|
523
|
}
|
|
524
|
|
|
525
|
/* Return WireGuard tunnel networks for a given address family */
|
|
526
|
function wg_get_tunnel_networks($family = 'both') {
|
|
527
|
global $config;
|
|
528
|
$wg_tunnel_networks = array();
|
|
529
|
init_config_arr(array('wireguard', 'tunnel'));
|
|
530
|
if (is_wg_enabled()) {
|
|
531
|
foreach ($config['wireguard']['tunnel'] as $wg) {
|
|
532
|
if (empty($wg['enabled']) ||
|
|
533
|
empty($wg['interface']['address'])) {
|
|
534
|
continue;
|
|
535
|
}
|
|
536
|
foreach(explode(',', $wg['interface']['address']) as $wga) {
|
|
537
|
list($wgnet, $wgmask) = explode('/', trim($wga));
|
|
538
|
if ((is_ipaddrv6($wgnet) && ($family == 'ipv4')) ||
|
|
539
|
(is_ipaddrv4($wgnet) && ($family == 'ipv6'))) {
|
|
540
|
continue;
|
|
541
|
}
|
|
542
|
$network = gen_subnet($wgnet, $wgmask);
|
|
543
|
$wg_tunnel_networks[] = "{$network}/{$wgmask}";
|
|
544
|
}
|
|
545
|
}
|
|
546
|
}
|
|
547
|
return $wg_tunnel_networks;
|
|
548
|
}
|
|
549
|
|
|
550
|
/* Locate a viable remote gateway address for a WireGuard tunnel
|
|
551
|
* Fall back to using the tunnel address itself.
|
|
552
|
* https://redmine.pfsense.org/issues/11300 */
|
|
553
|
function wg_find_tunnel_gw($tunnel, $addr) {
|
|
554
|
list($ip, $mask) = explode("/", trim($addr));
|
|
555
|
/* Loop through peers looking for a viable remote gateway address */
|
|
556
|
if (is_array($tunnel['peers']) &&
|
|
557
|
is_array($tunnel['peers']['wgpeer']) &&
|
|
558
|
count($tunnel['peers']['wgpeer']) > 0) {
|
|
559
|
foreach ($tunnel['peers']['wgpeer'] as $peer) {
|
|
560
|
/* If this peer has no configured Peer WireGuard Address, skip it. */
|
|
561
|
if (empty($peer['peerwgaddr'])) {
|
|
562
|
continue;
|
|
563
|
}
|
|
564
|
/* Check each Peer WireGuard Address entry */
|
|
565
|
foreach (explode(',', $peer['peerwgaddr']) as $pwga) {
|
|
566
|
/* Ensure the address family of this entry matches the one we're seeking */
|
|
567
|
if (is_v4($ip) !== is_v4($pwga)) {
|
|
568
|
continue;
|
|
569
|
}
|
|
570
|
/* If there is a subnet mask, ditch it. */
|
|
571
|
list($pip, $pmask) = explode('/', trim($pwga));
|
|
572
|
/* Check that this address is in the desired subnet */
|
|
573
|
if (ip_in_subnet($pip, trim($addr))) {
|
|
574
|
/* We found a good candidate, return it */
|
|
575
|
return $pip;
|
|
576
|
}
|
|
577
|
}
|
|
578
|
}
|
|
579
|
}
|
|
580
|
/* If no viable candidate is found, return the tunnel address */
|
|
581
|
return $ip;
|
|
582
|
}
|