<?php
/* $Id$ */
/*
	system_advanced_admin.php
	part of pfSense
	Copyright (C) 2005-2010 Scott Ullrich

	Copyright (C) 2008 Shrew Soft Inc

	originally part of m0n0wall (http://m0n0.ch/wall)
	Copyright (C) 2003-2004 Manuel Kasper <mk@neon1.net>.
	All rights reserved.

	Redistribution and use in source and binary forms, with or without
	modification, are permitted provided that the following conditions are met:

	1. Redistributions of source code must retain the above copyright notice,
	   this list of conditions and the following disclaimer.

	2. Redistributions in binary form must reproduce the above copyright
	   notice, this list of conditions and the following disclaimer in the
	   documentation and/or other materials provided with the distribution.

	THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
	INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
	AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
	AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
	OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
	SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
	INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
	CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
	ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
	POSSIBILITY OF SUCH DAMAGE.
*/
/*
	pfSense_BUILDER_BINARIES:	/usr/bin/killall
	pfSense_MODULE:	system
*/

##|+PRIV
##|*IDENT=page-system-advanced-admin
##|*NAME=System: Advanced: Admin Access Page
##|*DESCR=Allow access to the 'System: Advanced: Admin Access' page.
##|*MATCH=system_advanced_admin.php*
##|-PRIV

require("guiconfig.inc");
require_once("functions.inc");
require_once("filter.inc");
require_once("shaper.inc");

$pconfig['webguiproto'] = $config['system']['webgui']['protocol'];
$pconfig['webguiport'] = $config['system']['webgui']['port'];
$pconfig['max_procs'] = ($config['system']['webgui']['max_procs']) ? $config['system']['webgui']['max_procs'] : 2;
$pconfig['ssl-certref'] = $config['system']['webgui']['ssl-certref'];
$pconfig['disablehttpredirect'] = isset($config['system']['webgui']['disablehttpredirect']);
$pconfig['disableconsolemenu'] = isset($config['system']['disableconsolemenu']);
$pconfig['noantilockout'] = isset($config['system']['webgui']['noantilockout']);
$pconfig['nodnsrebindcheck'] = isset($config['system']['webgui']['nodnsrebindcheck']);
$pconfig['nohttpreferercheck'] = isset($config['system']['webgui']['nohttpreferercheck']);
$pconfig['noautocomplete'] = isset($config['system']['webgui']['noautocomplete']);
$pconfig['althostnames'] = $config['system']['webgui']['althostnames'];
$pconfig['enableserial'] = $config['system']['enableserial'];
$pconfig['enablesshd'] = $config['system']['enablesshd'];
$pconfig['sshport'] = $config['system']['ssh']['port'];
$pconfig['sshdkeyonly'] = isset($config['system']['ssh']['sshdkeyonly']);
$pconfig['quietlogin'] = isset($config['system']['webgui']['quietlogin']);

$a_cert =& $config['cert'];

$certs_available = false;
if (is_array($a_cert) && count($a_cert))
	$certs_available = true;

if (!$pconfig['webguiproto'] || !$certs_available)
	$pconfig['webguiproto'] = "http";

if ($_POST) {

	unset($input_errors);
	$pconfig = $_POST;

	/* input validation */
	if ($_POST['webguiport'])
		if(!is_port($_POST['webguiport']))
			$input_errors[] = gettext("You must specify a valid webConfigurator port number");

	if ($_POST['max_procs'])
		if(!is_numeric($_POST['max_procs']) || ($_POST['max_procs'] < 1) || ($_POST['max_procs'] > 500))
			$input_errors[] = gettext("Max Processes must be a number 1 or greater");

	if ($_POST['althostnames']) {
		$althosts = explode(" ", $_POST['althostnames']);
		foreach ($althosts as $ah)
			if (!is_hostname($ah))
				$input_errors[] = gettext("Alternate hostname " . htmlspecialchars($ah) . " is not a valid hostname.");
	}

	if ($_POST['sshport'])
		if(!is_port($_POST['sshport']))
			$input_errors[] = gettext("You must specify a valid port number");

	if($_POST['sshdkeyonly'] == "yes")
		$config['system']['ssh']['sshdkeyonly'] = "enabled";
	else if (isset($config['system']['ssh']['sshdkeyonly']))
		unset($config['system']['ssh']['sshdkeyonly']);

	ob_flush();
	flush();

	if (!$input_errors) {

		if (update_if_changed("webgui protocol", $config['system']['webgui']['protocol'], $_POST['webguiproto']))
			$restart_webgui = true;
		if (update_if_changed("webgui port", $config['system']['webgui']['port'], $_POST['webguiport']))
			$restart_webgui = true;
		if (update_if_changed("webgui certificate", $config['system']['webgui']['ssl-certref'], $_POST['ssl-certref']))
			$restart_webgui = true;
		if (update_if_changed("webgui max processes", $config['system']['webgui']['max_procs'], $_POST['max_procs']))
			$restart_webgui = true;

		if ($_POST['disablehttpredirect'] == "yes") {
			$config['system']['webgui']['disablehttpredirect'] = true;
			$restart_webgui = true;
		} else {
			unset($config['system']['webgui']['disablehttpredirect']);
			$restart_webgui = true;
		}
		if ($_POST['quietlogin'] == "yes") {
			$config['system']['webgui']['quietlogin'] = true;
		} else {
			unset($config['system']['webgui']['quietlogin']);
		}

		if($_POST['disableconsolemenu'] == "yes") {
			$config['system']['disableconsolemenu'] = true;
			auto_login();
		} else {
			unset($config['system']['disableconsolemenu']);
			auto_login();
		}

		if ($_POST['noantilockout'] == "yes")
			$config['system']['webgui']['noantilockout'] = true;
		else
			unset($config['system']['webgui']['noantilockout']);

		if ($_POST['enableserial'] == "yes")
			$config['system']['enableserial'] = true;
		else
			unset($config['system']['enableserial']);

		if ($_POST['nodnsrebindcheck'] == "yes")
			$config['system']['webgui']['nodnsrebindcheck'] = true;
		else
			unset($config['system']['webgui']['nodnsrebindcheck']);

		if ($_POST['nohttpreferercheck'] == "yes")
			$config['system']['webgui']['nohttpreferercheck'] = true;
		else
			unset($config['system']['webgui']['nohttpreferercheck']);

		if ($_POST['noautocomplete'] == "yes")
			$config['system']['webgui']['noautocomplete'] = true;
		else
			unset($config['system']['webgui']['noautocomplete']);

		if ($_POST['althostnames'])
			$config['system']['webgui']['althostnames'] = $_POST['althostnames'];
		else
			unset($config['system']['webgui']['althostnames']);

		$sshd_enabled = $config['system']['enablesshd'];
		if($_POST['enablesshd'])
			$config['system']['enablesshd'] = "enabled";
		else
			unset($config['system']['enablesshd']);

		$sshd_keyonly = isset($config['system']['sshdkeyonly']);
		if ($_POST['sshdkeyonly'])
			$config['system']['sshdkeyonly'] = true;
		else
			unset($config['system']['sshdkeyonly']);

		$sshd_port = $config['system']['ssh']['port'];
		if ($_POST['sshport'])
			$config['system']['ssh']['port'] = $_POST['sshport'];
		else if (isset($config['system']['ssh']['port']))
			unset($config['system']['ssh']['port']);

		if (($sshd_enabled != $config['system']['enablesshd']) ||
			($sshd_keyonly != $config['system']['sshdkeyonly']) ||
			($sshd_port != $config['system']['ssh']['port']))
			$restart_sshd = true;

		if ($restart_webgui) {
			global $_SERVER;
			list($host) = explode(":", $_SERVER['HTTP_HOST']);
			$prot = $config['system']['webgui']['protocol'];
			$port = $config['system']['webgui']['port'];
			if ($port)
				$url = "{$prot}://{$host}:{$port}/system_advanced_admin.php";
			else
				$url = "{$prot}://{$host}/system_advanced_admin.php";
		}

		write_config();

		$retval = filter_configure();
	    $savemsg = get_std_save_message($retval);

		if ($restart_webgui)
			$savemsg .= sprintf("<br />" . gettext("One moment...redirecting to %s in 20 seconds."),$url);

		conf_mount_rw();
		setup_serial_port();
		// Restart dnsmasq in case dns rebinding toggled
		services_dnsmasq_configure();
		conf_mount_ro();
	}
}

$pgtitle = array(gettext("System"),gettext("Advanced: Admin Access"));
include("head.inc");

?>

<body link="#0000CC" vlink="#0000CC" alink="#0000CC">
<?php include("fbegin.inc"); ?>
<script language="JavaScript">
<!--

function prot_change() {

	if (document.iform.https_proto.checked)
		document.getElementById("ssl_opts").style.display="";
	else
		document.getElementById("ssl_opts").style.display="none";
}

//-->
</script>
<?php
	if ($input_errors)
		print_input_errors($input_errors);
	if ($savemsg)
		print_info_box($savemsg);
?>
	<form action="system_advanced_admin.php" method="post" name="iform" id="iform">
		<table width="100%" border="0" cellpadding="0" cellspacing="0">
			<tr>
				<td>
					<?php
						$tab_array = array();
						$tab_array[] = array(gettext("Admin Access"), true, "system_advanced_admin.php");
						$tab_array[] = array(gettext("Firewall / NAT"), false, "system_advanced_firewall.php");
						$tab_array[] = array(gettext("Networking"), false, "system_advanced_network.php");
						$tab_array[] = array(gettext("Miscellaneous"), false, "system_advanced_misc.php");
						$tab_array[] = array(gettext("System Tunables"), false, "system_advanced_sysctl.php");
						$tab_array[] = array(gettext("Notifications"), false, "system_advanced_notifications.php");
						display_top_tabs($tab_array);
					?>
				</td>
			</tr>
			<tr>
				<td id="mainarea">
					<div class="tabcont">
						<span class="vexpl">
							<span class="red">
								<strong><?=gettext("Note:"); ?>&nbsp</strong>
							</span>
							<?=gettext("The options on this page are intended for use by advanced users only."); ?>
							<br/>
						</span>
						<br/>
						<table width="100%" border="0" cellpadding="6" cellspacing="0">
							<tr>
								<td colspan="2" valign="top" class="listtopic"><?=gettext("webConfigurator"); ?></td>
							</tr>
							<tr>
								<td width="22%" valign="top" class="vncell"><?=gettext("Protocol"); ?></td>
								<td width="78%" class="vtable">
									<?php
										if ($pconfig['webguiproto'] == "http")
											$http_chk = "checked";
										if ($pconfig['webguiproto'] == "https")
											$https_chk = "checked";
										if (!$certs_available)
											$https_disabled = "disabled";
									?>
									<input name="webguiproto" id="http_proto" type="radio" value="http" <?=$http_chk;?> onClick="prot_change()">
									<?=gettext("HTTP"); ?>
									&nbsp;&nbsp;&nbsp;
									<input name="webguiproto" id="https_proto" type="radio" value="https" <?=$https_chk;?> <?=$https_disabled;?> onClick="prot_change()">
									<?=gettext("HTTPS"); ?>
									<?php if (!$certs_available): ?>
									<br/>
									<?=gettext("No Certificates have been defined. You must"); ?>
									<a href="system_certmanager.php"><?=gettext("Create or Import"); ?></a>
									<?=gettext("a Certificate before SSL can be enabled."); ?>
									<?php endif; ?>
								</td>
							</tr>
							<tr id="ssl_opts">
								<td width="22%" valign="top" class="vncell"><?=gettext("SSL Certificate"); ?></td>
								<td width="78%" class="vtable">
									<select name="ssl-certref" id="ssl-certref" class="formselect">
										<?php
											foreach($a_cert as $cert):
												$selected = "";
												if ($pconfig['ssl-certref'] == $cert['refid'])
													$selected = "selected";
										?>
										<option value="<?=$cert['refid'];?>"<?=$selected;?>><?=$cert['descr'];?></option>
										<?php endforeach; ?>
									</select>
								</td>
							</tr>
							<tr>
								<td valign="top" class="vncell"><?=gettext("TCP port"); ?></td>
								<td class="vtable">
									<input name="webguiport" type="text" class="formfld unknown" id="webguiport" "size="5" value="<?=htmlspecialchars($config['system']['webgui']['port']);?>">
									<br>
									<span class="vexpl">
										<?=gettext("Enter a custom port number for the webConfigurator " .
										"above if you want to override the default (80 for HTTP, 443 " .
										"for HTTPS). Changes will take effect immediately after save."); ?>
									</span>
								</td>
							</tr>
							<tr>
								<td valign="top" class="vncell"><?=gettext("Max Processes"); ?></td>
								<td class="vtable">
									<input name="max_procs" type="text" class="formfld unknown" id="max_procs" "size="5" value="<?=htmlspecialchars($pconfig['max_procs']);?>">
									<br>
									<span class="vexpl">
										<?=gettext("Enter the number of webConfigurator processes you " .
										"want to run. This defaults to 2. Increasing this will allow more " .
										"users/browsers to access the GUI concurrently."); ?>
									</span>
								</td>
							</tr>
							<tr>
								<td width="22%" valign="top" class="vncell"><?=gettext("WebGUI redirect"); ?></td>
								<td width="78%" class="vtable">
									<input name="disablehttpredirect" type="checkbox" id="disablehttpredirect" value="yes" <?php if ($pconfig['disablehttpredirect']) echo "checked"; ?> />
									<strong><?=gettext("Disable webConfigurator redirect rule"); ?></strong>
									<br/>
									<?php echo gettext("When this is unchecked, access to the webConfigurator " .
									"is always permitted even on port 80, regardless of the listening port configured. " .
									"Check this box to disable this automatically added redirect rule. ");
									?>
								</td>
							</tr>
							<tr>
								<td width="22%" valign="top" class="vncell"><?=gettext("WebGUI Login Autocomplete"); ?></td>
								<td width="78%" class="vtable">
									<input name="noautocomplete" type="checkbox" id="noautocomplete" value="yes" <?php if ($pconfig['noautocomplete']) echo "checked"; ?> />
									<strong><?=gettext("Disable webConfigurator login autocomplete"); ?></strong>
									<br/>
									<?php echo gettext("When this is unchecked, login credentials for the webConfigurator " .
									"may be saved by the browser. While convenient, some security standards require this to be disabled. " .
									"Check this box to disable autocomplete on the login form so that browsers will not prompt to save credentials (NOTE: Some browsers do not respect this option). ");
									?>
								</td>
							</tr>
							<tr>
								<td width="22%" valign="top" class="vncell"><?=gettext("WebGUI login messages"); ?></td>
								<td width="78%" class="vtable">
									<input name="quietlogin" type="checkbox" id="quietlogin" value="yes" <?php if ($pconfig['quietlogin']) echo "checked"; ?> />
									<strong><?=gettext("Disable logging of webConfigurator successful logins"); ?></strong>
									<br/>
									<?php echo gettext("When this is checked, successful logins to the webConfigurator " .
									"will not be logged.");
									?>
								</td>
							</tr>
							<tr>
								<td width="22%" valign="top" class="vncell"><?=gettext("Anti-lockout"); ?></td>
								<td width="78%" class="vtable">
									<?php
										if($config['interfaces']['lan']) 
											$lockout_interface = "LAN";
										else 
											$lockout_interface = "WAN";
									?>
									<input name="noantilockout" type="checkbox" id="noantilockout" value="yes" <?php if ($pconfig['noantilockout']) echo "checked"; ?> />
									<strong><?=gettext("Disable webConfigurator anti-lockout rule"); ?></strong>
									<br/>
									<?php printf(gettext("When this is unchecked, access to the webConfigurator " .
									"on the %s interface is always permitted, regardless of the user-defined firewall " .
									"rule set. Check this box to disable this automatically added rule, so access " .
									"to the webConfigurator is controlled by the user-defined firewall rules " .
									"(ensure you have a firewall rule in place that allows you in, or you will " .
									"lock yourself out!)"), $lockout_interface); ?>
									<em> <?=gettext("Hint: the &quot;Set interface(s) IP address&quot; option in the console menu resets this setting as well."); ?> </em>
								</td>
							</tr>
							<tr>
								<td width="22%" valign="top" class="vncell"><?=gettext("DNS Rebind Check"); ?></td>
								<td width="78%" class="vtable">
									<input name="nodnsrebindcheck" type="checkbox" id="nodnsrebindcheck" value="yes" <?php if ($pconfig['nodnsrebindcheck']) echo "checked"; ?> />
									<strong><?=gettext("Disable DNS Rebinding Checks"); ?></strong>
									<br/>
									<?php echo gettext("When this is unchecked, your system " .
									"is protected against <a href=\"http://en.wikipedia.org/wiki/DNS_rebinding\">DNS Rebinding attacks</a>. " .
									"This blocks private IP responses from your configured DNS servers. Check this box to disable this protection if it interferes with " .
									"webConfigurator access or name resolution in your environment. "); ?>
								</td>
							</tr>
							<tr>
								<td width="22%" valign="top" class="vncell"><?=gettext("Alternate Hostnames"); ?></td>
								<td width="78%" class="vtable">
									<input name="althostnames" type="text" class="formfld unknown" id="althostnames" size="75" value="<?=htmlspecialchars($pconfig['althostnames']);?>"/>
									<br/>
									<strong><?=gettext("Alternate Hostnames for DNS Rebinding and HTTP_REFERER Checks"); ?></strong>
									<br/>
									<?php echo gettext("Here you can specify alternate hostnames by which the router may be queried, to " . 
									"bypass the DNS Rebinding Attack checks. Separate hostnames with spaces."); ?>
								</td>
							</tr>
							<tr>
								<td width="22%" valign="top" class="vncell"><?=gettext("Browser HTTP_REFERER enforcement"); ?></td>
								<td width="78%" class="vtable">
									<input name="nohttpreferercheck" type="checkbox" id="nohttpreferercheck" value="yes" <?php if ($pconfig['nohttpreferercheck']) echo "checked"; ?> />
									<strong><?=gettext("Disable HTTP_REFERER enforcement check"); ?></strong>
									<br/>
									<?php echo gettext("When this is unchecked, access to the webConfigurator " .
									"is protected against HTTP_REFERER redirection attempts. " .
									"Check this box to disable this protection if you find that it interferes with " .
									"webConfigurator access in certain corner cases such as using external scripts to interact with this system. More information on HTTP_REFERER is available from <a target='_new' href='http://en.wikipedia.org/wiki/HTTP_referrer'>Wikipedia</a>."); ?>
								</td>
							</tr>
							<tr>
								<td colspan="2" class="list" height="12">&nbsp;</td>
							</tr>
							<tr>
								<td colspan="2" valign="top" class="listtopic"><?=gettext("Secure Shell"); ?></td>
							</tr>
							<tr>
								<td width="22%" valign="top" class="vncell"><?=gettext("Secure Shell Server"); ?></td>
								<td width="78%" class="vtable">
									<input name="enablesshd" type="checkbox" id="enablesshd" value="yes" <?php if (isset($pconfig['enablesshd'])) echo "checked"; ?> />
									<strong><?=gettext("Enable Secure Shell"); ?></strong>
								</td>
							</tr>
							<tr>
								<td width="22%" valign="top" class="vncell"><?=gettext("Authentication Method"); ?></td>
								<td width="78%" class="vtable">
									<input name="sshdkeyonly" type="checkbox" id="sshdkeyonly" value="yes" <?php if ($pconfig['sshdkeyonly']) echo "checked"; ?> />
									<strong><?=gettext("Disable password login for Secure Shell (RSA key only)"); ?></strong>
									<br/>
									<?=gettext("When enabled, authorized keys need to be configured for each"); ?>
									<a href="system_usermanager.php"><?=gettext("user"); ?></a>
									<?=gettext("that has been granted secure shell access."); ?>
								</td>
							</tr>
							<tr>
								<td width="22%" valign="top" class="vncell"><?=gettext("SSH port"); ?></td>
								<td width="78%" class="vtable">
									<input name="sshport" type="text" id="sshport" value="<?php echo $pconfig['sshport']; ?>" />
									<br/>
									<span class="vexpl"><?=gettext("Note: Leave this blank for the default of 22."); ?></span>
								</td>
							</tr>
							<tr>
								<td colspan="2" class="list" height="12">&nbsp;</td>
							</tr>
							<?php if($g['platform'] == "pfSense" || $g['platform'] == "cdrom"): ?>
							<tr>
								<td colspan="2" valign="top" class="listtopic"><?=gettext("Serial Communcations"); ?></td>
							</tr>
							<tr>
								<td width="22%" valign="top" class="vncell"><?=gettext("Serial Terminal"); ?></td>
								<td width="78%" class="vtable">
									<input name="enableserial" type="checkbox" id="enableserial" value="yes" <?php if (isset($pconfig['enableserial'])) echo "checked"; ?> />
									<strong><?=gettext("This will enable the first serial port with 9600/8/N/1"); ?></strong>
									<br>
									<span class="vexpl"><?=gettext("Note:  This will redirect the console output and messages to the serial port. You can still access the console menu from the internal video card/keyboard. A <b>null modem</b> serial cable or adapter is required to use the serial console."); ?></span>
								</td>
							</tr>
							<tr>
								<td colspan="2" class="list" height="12">&nbsp;</td>
							</tr>
							<?php endif; ?>
							<tr>
								<td colspan="2" valign="top" class="listtopic"><?=gettext("Console Options"); ?></td>
							</tr>
							<tr>
								<td width="22%" valign="top" class="vncell"><?=gettext("Console menu"); ?></td>
								<td width="78%" class="vtable">
									<input name="disableconsolemenu" type="checkbox" id="disableconsolemenu" value="yes" <?php if ($pconfig['disableconsolemenu']) echo "checked"; ?>  />
									<strong><?=gettext("Password protect the console menu"); ?></strong>
									<br/>
									<span class="vexpl"><?=gettext("Changes to this option will take effect after a reboot."); ?></span>
								</td>
							</tr>
							<tr>
								<td colspan="2" class="list" height="12">&nbsp;</td>
							</tr>							
							<tr>
								<td width="22%" valign="top">&nbsp;</td>
								<td width="78%"><input name="Submit" type="submit" class="formbtn" value="<?=gettext("Save");?>" /></td>
							</tr>
							<tr>
								<td colspan="2" class="list" height="12">&nbsp;</td>
							</tr>
						</table>
					</div>
				</td>
			</tr>
		</table>
	</form>
	<script language="JavaScript" type="text/javascript">
	<!--
		prot_change();
	//-->
	</script>

<?php include("fend.inc"); ?>
<?php
	if ($restart_webgui)
		echo "<meta http-equiv=\"refresh\" content=\"20;url={$url}\">";
?>
</body>
</html>

<?php
if ($restart_sshd) {

	killbyname("sshd");
	log_error(gettext("secure shell configuration has changed. Stopping sshd."));

	if ($config['system']['enablesshd']) {
		log_error(gettext("secure shell configuration has changed. Restarting sshd."));
		send_event("service restart sshd");
	}
}
if ($restart_webgui) {
	ob_flush();
	flush();
	log_error(gettext("webConfigurator configuration has changed. Restarting webConfigurator."));
	send_event("service restart webgui");
}

?>
