pfSense

<?php

/*

 * autoconfigbackup.inc

 *

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

 * Copyright (c) 2008-2013 BSD Perimeter

 * Copyright (c) 2013-2016 Electric Sheep Fencing

 * Copyright (c) 2014-2021 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.

 */

require_once("filter.inc");

require_once("notices.inc");

// If there is no ssh key in the system to identify this firewall, generate a pair now

function get_device_key() {

	if (!file_exists("/etc/ssh/ssh_host_ed25519_key.pub")) {

		// Remove any possible matching key so we don't get an overwrite prompt

		if (file_exists('/etc/ssh/ssh_host_ed25519_key')) {

			unlink('/etc/ssh/ssh_host_ed25519_key');

		}

		// Generate a new key pair

		exec("/usr/bin/nice -n20 /usr/bin/ssh-keygen -t ed25519 -b 4096 -N '' -f /etc/ssh/ssh_host_ed25519_key");

		sleep(2);

		$cnt = 0;

		while(!file_exists("/etc/ssh/ssh_host_ed25519_key.pub")) {

			sleep(2);

			if (++$cnt > 10) {

				return "";

			}

		}

	}

	$pkey =  file_get_contents("/etc/ssh/ssh_host_ed25519_key.pub");

	// Check that the key looks reasonable

	if (substr($pkey, 0, 3) != "ssh") {

		return "";

	}

	return hash("sha256", $pkey);

}

$origkey = get_device_key();

if (isset($_REQUEST['userkey']) && !empty($_REQUEST['userkey'])) {

	$userkey = htmlentities($_REQUEST['userkey']);

} else {

	$userkey = get_device_key();

}

$uniqueID = system_get_uniqueid();

/* Check whether ACB is enabled */

function acb_enabled() {

	global $config;

	$acb_enabled = false;

	if (is_array($config['system']['acb'])) {

		if ($config['system']['acb']['enable'] == "yes") {

			$acb_enabled = true;

		}

	}

	return $acb_enabled;

}

// Ensures patches match

function acb_custom_php_validation_command($post, &$input_errors) {

	global $_POST, $savemsg, $config;

	// Do nothing when ACB is disabled in configuration

	// This also makes it possible to delete the credentials from config.xml

	if (!acb_enabled()) {

		// We do not need to store this value.

		unset($_POST['testconnection']);

		return;

	}

	if (!$post['crypto_password'] or !$post['crypto_password2']) {

		$input_errors[] = "The encryption password is required.";

	}

	if ($post['crypto_password'] <> $post['crypto_password2']) {

		$input_errors[] = "Sorry, the entered encryption passwords do not match.";

	}

	if ($post['testconnection']) {

		$status = test_connection($post);

		if ($status) {

			$savemsg = "Connection to the ACB server was tested with no errors.";

		}

	}

	// We do not need to store this value.

	unset($_POST['testconnection']);

}

function acb_custom_php_resync_config_command() {

	// Do nothing when ACB is disabled in configuration

	if (!acb_enabled()) {

		return;

	}

	unlink_if_exists("/cf/conf/lastpfSbackup.txt");

	if (!function_exists("filter_configure")) {

		require_once("filter.inc");

	}

	filter_configure();

	if ($savemsg) {

		$savemsg .= "<br/>";

	}

	$savemsg .= "A configuration backup has been queued.";

}

function test_connection($post) {

	global $savemsg, $config, $g;

	// Do nothing when booting or when not enabled

	if (platform_booting() || !acb_enabled()) {

		return;

	}

	// Separator used during client / server communications

	$oper_sep = "\|\|";

	// Encryption password

	$decrypt_password = $post['crypto_password'];

	// Defined username. Username must be sent lowercase. See Redmine #7127 and Netgate Redmine #163

	$username = strtolower($post['username']);

	// Defined password

	$password = $post['password'];

	// Set hostname

	$hostname = $config['system']['hostname'] . "." . $config['system']['domain'];

	// URL to restore.php

	$get_url = "https://acb.netgate.com/getbkp";

	// Populate available backups

	$curl_session = curl_init();

	curl_setopt($curl_session, CURLOPT_URL, $get_url);

	curl_setopt($curl_session, CURLOPT_SSL_VERIFYPEER, 1);

	curl_setopt($curl_session, CURLOPT_POST, 1);

	curl_setopt($curl_session, CURLOPT_RETURNTRANSFER, 1);

	curl_setopt($curl_session, CURLOPT_CONNECTTIMEOUT, 55);

	curl_setopt($curl_session, CURLOPT_TIMEOUT, 30);

	curl_setopt($curl_session, CURLOPT_USERAGENT, $g['product_label'] . '/' . rtrim(file_get_contents("/etc/version")));

	// Proxy

	set_curlproxy($curl_session);

	curl_setopt($curl_session, CURLOPT_POSTFIELDS, "action=showbackups&hostname={$hostname}");

	$data = curl_exec($curl_session);

	if (curl_errno($curl_session)) {

		return("An error occurred " . curl_error($curl_session));

	} else {

		curl_close($curl_session);

	}

	return;

}

function upload_config($manual = false) {

	global $config, $g, $input_errors, $userkey, $uniqueID;

	if (empty($userkey)) {

		$userkey = get_device_key();

	}

	if (empty($uniqueID)) {

		$uniqueID = system_get_uniqueid();

	}

	// Do nothing when booting or when not enabled

	if (platform_booting() || !acb_enabled()) {

		return;

	}

	/*

	 * pfSense upload config to acb.netgate.com script

	 * This file plugs into config.inc (/usr/local/pkg/parse_config)

	 * and runs every time the running firewall filter changes.

	 *

	 */

	if (file_exists("/tmp/acb_nooverwrite")) {

		unlink("/tmp/acb_nooverwrite");

		$nooverwrite = "true";

	} else {

		$nooverwrite = "false";

	}

	// Define some needed variables

	if (file_exists("/cf/conf/lastpfSbackup.txt")) {

		$last_backup_date = str_replace("\n", "", file_get_contents("/cf/conf/lastpfSbackup.txt"));

	} else {

		$last_backup_date = "";

	}

	$last_config_change = $config['revision']['time'];

	$hostname = $config['system']['hostname'] . "." . $config['system']['domain'];

	$reason	= $config['revision']['description'];

	if ($manual && array_key_exists('numman', $config['system']['acb'])) {

		$manmax = $config['system']['acb']['numman'];

	} else {

		$manmax = "0";

	}

	$encryptpw = $config['system']['acb']['encryption_password'];

	// Define upload_url, must be present after other variable definitions due to username, password

	$upload_url = "https://acb.netgate.com/save";

	if (!$encryptpw) {

		if (!file_exists("/cf/conf/autoconfigback.notice")) {

			$notice_text = "The encryption password is not set for Automatic Configuration Backup.";

			$notice_text .= " Please correct this in Services -> AutoConfigBackup -> Settings.";

			log_error($notice_text);

			file_notice("AutoConfigBackup", $notice_text, $notice_text, "");

			touch("/cf/conf/autoconfigback.notice");

		}

	} else {

		/* If configuration has changed, upload to pfS */

		if ($last_backup_date <> $last_config_change) {

			$notice_text = "Beginning configuration backup to " . $upload_url;

			log_error($notice_text);

			update_filter_reload_status($notice_text);

			// Encrypt config.xml

			$data = file_get_contents("/cf/conf/config.xml");

			$raw_config_sha256_hash = trim(shell_exec("/sbin/sha256 /cf/conf/config.xml | /usr/bin/awk '{ print $4 }'"));

			$data = encrypt_data($data, $encryptpw);

			$tmpname = "/tmp/" . $raw_config_sha256_hash . ".tmp";

			tagfile_reformat($data, $data, "config.xml");

			file_put_contents($tmpname, $data);

			$post_fields = array(

				'reason' => htmlspecialchars($reason),

				'uid' => $uniqueID,

				'file' => curl_file_create($tmpname, 'image/jpg', 'config.jpg'),

				'userkey' => htmlspecialchars($userkey),

				'sha256_hash' => $raw_config_sha256_hash,

				'version' => $g['product_version'],

				'hint' => $config['system']['acb']['hint'],

				'manmax' => $manmax

			);

			// Check configuration into the ESF repo

			$curl_session = curl_init();

			curl_setopt($curl_session, CURLOPT_URL, "https://acb.netgate.com/save");

			curl_setopt($curl_session, CURLOPT_POST, count($post_fields));

			curl_setopt($curl_session, CURLOPT_POSTFIELDS, $post_fields);

			curl_setopt($curl_session, CURLOPT_RETURNTRANSFER, 1);

			curl_setopt($curl_session, CURLOPT_SSL_VERIFYPEER, 1);

			curl_setopt($curl_session, CURLOPT_CONNECTTIMEOUT, 55);

			curl_setopt($curl_session, CURLOPT_TIMEOUT, 30);

			curl_setopt($curl_session, CURLOPT_USERAGENT, $g['product_label'] . '/' . rtrim(file_get_contents("/etc/version")));

			// Proxy

			set_curlproxy($curl_session);

			$data = curl_exec($curl_session);

			unlink_if_exists($tmpname);

			if (curl_errno($curl_session)) {

				$fd = fopen("/tmp/backupdebug.txt", "w");

				fwrite($fd, $upload_url . "" . $fields_string . "\n\n");

				fwrite($fd, $data);

				fwrite($fd, curl_error($curl_session));

				fclose($fd);

			} else {

				curl_close($curl_session);

			}

			if (strpos($data, "500") != false) {

				$notice_text = sprintf(gettext(

				    "An error occurred while uploading your %s configuration to "), $g['product_label']) .

				    $upload_url . " (" . htmlspecialchars($data) . ")";

				log_error($notice_text . " - " . $data);

				file_notice("AutoConfigBackup", $notice_text);

				update_filter_reload_status($notice_text);

				$input_errors["acb_upload"] = $notice_text;

			} else {

				// Update last pfS backup time

				$fd = fopen("/cf/conf/lastpfSbackup.txt", "w");

				fwrite($fd, $config['revision']['time']);

				fclose($fd);

				$notice_text = "End of configuration backup to " . $upload_url . " (success).";

				log_error($notice_text);

				update_filter_reload_status($notice_text);

			}

		} else {

			// Debugging

			//log_error("No https://acb.netgate.com backup required.");

		}

	}

}

// Save the updated ACB configuration

// Create a crontab entry for scheduled backups

// if frequency == "cron", a new crontab entry is created, otherwise any existing

// ACB entry is removed

function setup_ACB($enable, $hint, $frequency, $hours, $month, $day, $dow, $numman, $pwd) {

	global $config;

	$config['system']['acb']['enable'] = $enable;

	$config['system']['acb']['hint'] = $hint;

	$config['system']['acb']['frequency'] = $frequency;

	$config['system']['acb']['hour'] = $hours;

	$config['system']['acb']['month'] = $month;

	$config['system']['acb']['day'] = $day;

	$config['system']['acb']['dow'] = $dow;

	$config['system']['acb']['numman'] = $numman;

	if (strlen($pwd) >= 8) {

		$config['system']['acb']['encryption_password'] = $pwd;

	}

	init_config_arr(array('cron'));

	$a_cron = &$config['cron']['item'];

	$croncmd = "/usr/bin/nice -n20 /usr/local/bin/php /usr/local/sbin/execacb.php";

	$i = 0;

	// Remove the existing cron job

	if (count($a_cron) > 0) {

		foreach ($a_cron as $ent) {

			if ($ent['command'] === $croncmd) {

				unset($a_cron[$i]);

				break;

			}

		$i++;

		}

	}

	if ($frequency == "cron") {

		$crondef = array();

		$crondef['minute'] = '0';

		$crondef['hour'] = $hours;

		$crondef['mday'] = $day;

		$crondef['month'] = $month;

		$crondef['wday'] = $dow;

		$crondef['who'] = 'root';

		$crondef['command'] = $croncmd;

		$a_cron[$i] = $crondef;

	}

	write_config("AutoConfigBackup settings updated");

	configure_cron();

}