<?php
/*
	auth.inc
*/
/* ====================================================================
 *	Copyright (c)  2004-2015  Electric Sheep Fencing, LLC. All rights reserved.
 *	Copyright (c)  2005-2006 Bill Marquette <bill.marquette@gmail.com>
 *	Copyright (c)  2006 Paul Taylor <paultaylor@winn-dixie.com>
 *	Copyright (c)  2003-2006 Manuel Kasper <mk@neon1.net>
 *
 *	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.
 *
 *	3. All advertising materials mentioning features or use of this software
 *		must display the following acknowledgment:
 *		"This product includes software developed by the pfSense Project
 *		 for use in the pfSense software distribution. (http://www.pfsense.org/).
 *
 *	4. The names "pfSense" and "pfSense Project" must not be used to
 *		 endorse or promote products derived from this software without
 *		 prior written permission. For written permission, please contact
 *		 coreteam@pfsense.org.
 *
 *	5. Products derived from this software may not be called "pfSense"
 *		nor may "pfSense" appear in their names without prior written
 *		permission of the Electric Sheep Fencing, LLC.
 *
 *	6. Redistributions of any form whatsoever must retain the following
 *		acknowledgment:
 *
 *	"This product includes software developed by the pfSense Project
 *	for use in the pfSense software distribution (http://www.pfsense.org/).
 *
 *	THIS SOFTWARE IS PROVIDED BY THE pfSense PROJECT ``AS IS'' AND ANY
 *	EXPRESSED 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 pfSense PROJECT OR
 *	ITS CONTRIBUTORS 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.
 *
 *	====================================================================
 *
 */
/*
 * NOTE : Portions of the mschapv2 support was based on the BSD licensed CHAP.php
 * file courtesy of Michael Retterklieber.
 */
if (!$do_not_include_config_gui_inc) {
	require_once("config.gui.inc");
}

// Will be changed to false if security checks fail
$security_passed = true;

/* If this function doesn't exist, we're being called from Captive Portal or
   another internal subsystem which does not include authgui.inc */
if (function_exists("display_error_form") && !isset($config['system']['webgui']['nodnsrebindcheck'])) {
	/* DNS ReBinding attack prevention.  https://redmine.pfsense.org/issues/708 */
	$found_host = false;

	/* Either a IPv6 address with or without a alternate port */
	if (strstr($_SERVER['HTTP_HOST'], "]")) {
		$http_host_port = explode("]", $_SERVER['HTTP_HOST']);
		/* v6 address has more parts, drop the last part */
		if (count($http_host_port) > 1) {
			array_pop($http_host_port);
			$http_host = str_replace(array("[", "]"), "", implode(":", $http_host_port));
		} else {
			$http_host = str_replace(array("[", "]"), "", implode(":", $http_host_port));
		}
	} else {
		$http_host = explode(":", $_SERVER['HTTP_HOST']);
		$http_host = $http_host[0];
	}
	if (is_ipaddr($http_host) or $_SERVER['SERVER_ADDR'] == "127.0.0.1" or
		strcasecmp($http_host, "localhost") == 0 or $_SERVER['SERVER_ADDR'] == "::1") {
		$found_host = true;
	}
	if (strcasecmp($http_host, $config['system']['hostname'] . "." . $config['system']['domain']) == 0 or
		strcasecmp($http_host, $config['system']['hostname']) == 0) {
		$found_host = true;
	}

	if (is_array($config['dyndnses']['dyndns']) && !$found_host) {
		foreach ($config['dyndnses']['dyndns'] as $dyndns) {
			if (strcasecmp($dyndns['host'], $http_host) == 0) {
				$found_host = true;
				break;
			}
		}
	}

	if (is_array($config['dnsupdates']['dnsupdate']) && !$found_host) {
		foreach ($config['dnsupdates']['dnsupdate'] as $rfc2136) {
			if (strcasecmp($rfc2136['host'], $http_host) == 0) {
				$found_host = true;
				break;
			}
		}
	}

	if (!empty($config['system']['webgui']['althostnames']) && !$found_host) {
		$althosts = explode(" ", $config['system']['webgui']['althostnames']);
		foreach ($althosts as $ah) {
			if (strcasecmp($ah, $http_host) == 0 or strcasecmp($ah, $_SERVER['SERVER_ADDR']) == 0) {
				$found_host = true;
				break;
			}
		}
	}

	if ($found_host == false) {
		if (!security_checks_disabled()) {
			display_error_form("501", gettext("Potential DNS Rebind attack detected, see http://en.wikipedia.org/wiki/DNS_rebinding<br />Try accessing the router by IP address instead of by hostname."));
			exit;
		}
		$security_passed = false;
	}
}

// If the HTTP_REFERER is something other than ourselves then disallow.
if (function_exists("display_error_form") && !isset($config['system']['webgui']['nohttpreferercheck'])) {
	if ($_SERVER['HTTP_REFERER']) {
		if (file_exists("{$g['tmp_path']}/setupwizard_lastreferrer")) {
			if ($_SERVER['HTTP_REFERER'] == file_get_contents("{$g['tmp_path']}/setupwizard_lastreferrer")) {
				unlink("{$g['tmp_path']}/setupwizard_lastreferrer");
				header("Refresh: 1; url=index.php");
?>
<!DOCTYPE html>
<html lang="en">
<head>
	<link rel="stylesheet" href="/bootstrap/css/pfSense.css" />
	<title><?=gettext("Redirecting..."); ?></title>
</head>
<body id="error" class="no-menu">
	<div id="jumbotron">
		<div class="container">
			<div class="col-sm-offset-3 col-sm-6 col-xs-12">
				<p><?=gettext("Redirecting to the dashboard...")?></p>
			</div>
		</div>
	</div>
</body>
</html>
<?php
				exit;
			}
		}
		$found_host = false;
		$referrer_host = parse_url($_SERVER['HTTP_REFERER'], PHP_URL_HOST);
		$referrer_host = str_replace(array("[", "]"), "", $referrer_host);
		if ($referrer_host) {
			if (strcasecmp($referrer_host, $config['system']['hostname'] . "." . $config['system']['domain']) == 0 ||
			    strcasecmp($referrer_host, $config['system']['hostname']) == 0) {
				$found_host = true;
			}

			if (!empty($config['system']['webgui']['althostnames']) && !$found_host) {
				$althosts = explode(" ", $config['system']['webgui']['althostnames']);
				foreach ($althosts as $ah) {
					if (strcasecmp($referrer_host, $ah) == 0) {
						$found_host = true;
						break;
					}
				}
			}

			if (is_array($config['dyndnses']['dyndns']) && !$found_host) {
				foreach ($config['dyndnses']['dyndns'] as $dyndns) {
					if (strcasecmp($dyndns['host'], $referrer_host) == 0) {
						$found_host = true;
						break;
					}
				}
			}

			if (is_array($config['dnsupdates']['dnsupdate']) && !$found_host) {
				foreach ($config['dnsupdates']['dnsupdate'] as $rfc2136) {
					if (strcasecmp($rfc2136['host'], $referrer_host) == 0) {
						$found_host = true;
						break;
					}
				}
			}

			if (!$found_host) {
				$interface_list_ips = get_configured_ip_addresses();
				foreach ($interface_list_ips as $ilips) {
					if (strcasecmp($referrer_host, $ilips) == 0) {
						$found_host = true;
						break;
					}
				}
				$interface_list_ipv6s = get_configured_ipv6_addresses();
				foreach ($interface_list_ipv6s as $ilipv6s) {
					if (strcasecmp($referrer_host, $ilipv6s) == 0) {
						$found_host = true;
						break;
					}
				}
				if ($referrer_host == "127.0.0.1" || $referrer_host == "localhost") {
					// allow SSH port forwarded connections and links from localhost
					$found_host = true;
				}
			}
		}
		if ($found_host == false) {
			if (!security_checks_disabled()) {
				display_error_form("501", "An HTTP_REFERER was detected other than what is defined in System -> Advanced (" . htmlspecialchars($_SERVER['HTTP_REFERER']) . ").  You can disable this check if needed in System -> Advanced -> Admin.");
				exit;
			}
			$security_passed = false;
		}
	} else {
		$security_passed = false;
	}
}

if (function_exists("display_error_form") && $security_passed) {
	/* Security checks passed, so it should be OK to turn them back on */
	restore_security_checks();
}
unset($security_passed);

$groupindex = index_groups();
$userindex = index_users();

function index_groups() {
	global $g, $debug, $config, $groupindex;

	$groupindex = array();

	if (is_array($config['system']['group'])) {
		$i = 0;
		foreach ($config['system']['group'] as $groupent) {
			$groupindex[$groupent['name']] = $i;
			$i++;
		}
	}

	return ($groupindex);
}

function index_users() {
	global $g, $debug, $config;

	if (is_array($config['system']['user'])) {
		$i = 0;
		foreach ($config['system']['user'] as $userent) {
			$userindex[$userent['name']] = $i;
			$i++;
		}
	}

	return ($userindex);
}

function & getUserEntry($name) {
	global $debug, $config, $userindex;
	if (isset($userindex[$name])) {
		return $config['system']['user'][$userindex[$name]];
	}
}

function & getUserEntryByUID($uid) {
	global $debug, $config;

	if (is_array($config['system']['user'])) {
		foreach ($config['system']['user'] as & $user) {
			if ($user['uid'] == $uid) {
				return $user;
			}
		}
	}

	return false;
}

function & getGroupEntry($name) {
	global $debug, $config, $groupindex;
	if (isset($groupindex[$name])) {
		return $config['system']['group'][$groupindex[$name]];
	}
}

function & getGroupEntryByGID($gid) {
	global $debug, $config;

	if (is_array($config['system']['group'])) {
		foreach ($config['system']['group'] as & $group) {
			if ($group['gid'] == $gid) {
				return $group;
			}
		}
	}

	return false;
}

function get_user_privileges(& $user) {

	$privs = $user['priv'];
	if (!is_array($privs)) {
		$privs = array();
	}

	$names = local_user_get_groups($user, true);

	foreach ($names as $name) {
		$group = getGroupEntry($name);
		if (is_array($group['priv'])) {
			$privs = array_merge($privs, $group['priv']);
		}
	}

	return $privs;
}

function userHasPrivilege($userent, $privid = false) {

	if (!$privid || !is_array($userent)) {
		return false;
	}

	$privs = get_user_privileges($userent);

	if (!is_array($privs)) {
		return false;
	}

	if (!in_array($privid, $privs)) {
		return false;
	}

	return true;
}

function local_backed($username, $passwd) {

	$user = getUserEntry($username);
	if (!$user) {
		return false;
	}

	if (is_account_disabled($username) || is_account_expired($username)) {
		return false;
	}

	if ($user['bcrypt-hash']) {
		if (password_verify($passwd, $user['bcrypt-hash'])) {
			return true;
		}
	}

	//for backwards compatibility
	if ($user['password']) {
		if (crypt($passwd, $user['password']) == $user['password']) {
			return true;
		}
	}

	if ($user['md5-hash']) {
		if (md5($passwd) == $user['md5-hash']) {
			return true;
		}
	}

	return false;
}

function local_sync_accounts() {
	global $debug, $config;
	conf_mount_rw();

	/* remove local users to avoid uid conflicts */
	$fd = popen("/usr/sbin/pw usershow -a", "r");
	if ($fd) {
		while (!feof($fd)) {
			$line = explode(":", fgets($fd));
			if (((!strncmp($line[0], "_", 1)) || ($line[2] < 2000) || ($line[2] > 65000)) && ($line[0] != "admin")) {
				continue;
			}
			/*
			 * If a crontab was created to user, pw userdel will be interactive and
			 * can cause issues. Just remove crontab before run it when necessary
			 */
			unlink_if_exists("/var/cron/tabs/{$line[0]}");
			$cmd = "/usr/sbin/pw userdel -n '{$line[0]}'";
			if ($debug) {
				log_error(sprintf(gettext("Running: %s"), $cmd));
			}
			mwexec($cmd);
		}
		pclose($fd);
	}

	/* remove local groups to avoid gid conflicts */
	$gids = array();
	$fd = popen("/usr/sbin/pw groupshow -a", "r");
	if ($fd) {
		while (!feof($fd)) {
			$line = explode(":", fgets($fd));
			if (!strncmp($line[0], "_", 1)) {
				continue;
			}
			if ($line[2] < 2000) {
				continue;
			}
			if ($line[2] > 65000) {
				continue;
			}
			$cmd = "/usr/sbin/pw groupdel {$line[2]}";
			if ($debug) {
				log_error(sprintf(gettext("Running: %s"), $cmd));
			}
			mwexec($cmd);
		}
		pclose($fd);
	}

	/* make sure the all group exists */
	$allgrp = getGroupEntryByGID(1998);
	local_group_set($allgrp, true);

	/* sync all local users */
	if (is_array($config['system']['user'])) {
		foreach ($config['system']['user'] as $user) {
			local_user_set($user);
		}
	}

	/* sync all local groups */
	if (is_array($config['system']['group'])) {
		foreach ($config['system']['group'] as $group) {
			local_group_set($group);
		}
	}

	conf_mount_ro();

}

function local_user_set(& $user) {
	global $g, $debug;

	if (empty($user['password']) && empty($user['bcrypt-hash'])) {
		log_error("There is something wrong in your config because user {$user['name']} password is missing!");
		return;
	}

	conf_mount_rw();

	$home_base = "/home/";
	$user_uid = $user['uid'];
	$user_name = $user['name'];
	$user_home = "{$home_base}{$user_name}";
	$user_shell = "/etc/rc.initial";
	$user_group = "nobody";

	// Ensure $home_base exists and is writable
	if (!is_dir($home_base)) {
		mkdir($home_base, 0755);
	}

	$lock_account = false;
	/* configure shell type */
	/* Cases here should be ordered by most privileged to least privileged. */
	if (userHasPrivilege($user, "user-shell-access") || userHasPrivilege($user, "page-all")) {
		$user_shell = "/bin/tcsh";
	} elseif (userHasPrivilege($user, "user-copy-files")) {
		$user_shell = "/usr/local/bin/scponly";
	} elseif (userHasPrivilege($user, "user-ssh-tunnel")) {
		$user_shell = "/usr/local/sbin/ssh_tunnel_shell";
	} elseif (userHasPrivilege($user, "user-ipsec-xauth-dialin")) {
		$user_shell = "/sbin/nologin";
	} else {
		$user_shell = "/sbin/nologin";
		$lock_account = true;
	}

	/* Lock out disabled or expired users, unless it's root/admin. */
	if ((is_account_disabled($user_name) || is_account_expired($user_name)) && ($user_uid != 0)) {
		$user_shell = "/sbin/nologin";
		$lock_account = true;
	}

	/* root user special handling */
	if ($user_uid == 0) {
		$cmd = "/usr/sbin/pw usermod -q -n root -s /bin/sh -H 0";
		if ($debug) {
			log_error(sprintf(gettext("Running: %s"), $cmd));
		}
		$fd = popen($cmd, "w");
		if (empty($user['bcrypt-hash'])) {
			fwrite($fd, $user['password']);
		} else {
			fwrite($fd, $user['bcrypt-hash']);
		}
		pclose($fd);
		$user_group = "wheel";
		$user_home = "/root";
		$user_shell = "/etc/rc.initial";
	}

	/* read from pw db */
	$fd = popen("/usr/sbin/pw usershow -n {$user_name} 2>&1", "r");
	$pwread = fgets($fd);
	pclose($fd);
	$userattrs = explode(":", trim($pwread));

	/* determine add or mod */
	if (($userattrs[0] != $user['name']) || (!strncmp($pwread, "pw:", 3))) {
		$user_op = "useradd -m -k /etc/skel -o";
	} else {
		$user_op = "usermod";
	}

	$comment = str_replace(array(":", "!", "@"), " ", $user['descr']);
	/* add or mod pw db */
	$cmd = "/usr/sbin/pw {$user_op} -q -u {$user_uid} -n {$user_name}".
			" -g {$user_group} -s {$user_shell} -d {$user_home}".
			" -c ".escapeshellarg($comment)." -H 0 2>&1";

	if ($debug) {
		log_error(sprintf(gettext("Running: %s"), $cmd));
	}
	$fd = popen($cmd, "w");
	if (empty($user['bcrypt-hash'])) {
		fwrite($fd, $user['password']);
	} else {
		fwrite($fd, $user['bcrypt-hash']);
	}
	pclose($fd);

	/* create user directory if required */
	if (!is_dir($user_home)) {
		mkdir($user_home, 0700);
	}
	@chown($user_home, $user_name);
	@chgrp($user_home, $user_group);

	/* write out ssh authorized key file */
	if ($user['authorizedkeys']) {
		if (!is_dir("{$user_home}/.ssh")) {
			@mkdir("{$user_home}/.ssh", 0700);
			@chown("{$user_home}/.ssh", $user_name);
		}
		$keys = base64_decode($user['authorizedkeys']);
		@file_put_contents("{$user_home}/.ssh/authorized_keys", $keys);
		@chown("{$user_home}/.ssh/authorized_keys", $user_name);
	} else {
		unlink_if_exists("{$user_home}/.ssh/authorized_keys");
	}

	$un = $lock_account ? "" : "un";
	exec("/usr/sbin/pw {$un}lock {$user_name} -q 2>/dev/null");

	conf_mount_ro();
}

function local_user_del($user) {
	global $debug;

	/* remove all memberships */
	local_user_set_groups($user);

	/* Don't remove /root */
	if ($user['uid'] != 0) {
		$rmhome = "-r";
	}

	/* read from pw db */
	$fd = popen("/usr/sbin/pw usershow -n {$user['name']} 2>&1", "r");
	$pwread = fgets($fd);
	pclose($fd);
	$userattrs = explode(":", trim($pwread));

	if ($userattrs[0] != $user['name']) {
		log_error("Tried to remove user {$user['name']} but got user {$userattrs[0]} instead. Bailing.");
		return;
	}

	/* delete from pw db */
	$cmd = "/usr/sbin/pw userdel -n {$user['name']} {$rmhome}";

	if ($debug) {
		log_error(sprintf(gettext("Running: %s"), $cmd));
	}
	mwexec($cmd);

	/* Delete user from groups needs a call to write_config() */
	local_group_del_user($user);
}

function local_user_set_password(&$user, $password) {

	unset($user['password']);
	unset($user['md5-hash']);
	$user['bcrypt-hash'] = password_hash($password, PASSWORD_BCRYPT);

	/* Maintain compatibility with FreeBSD - change $2y$ prefix to $2b$
	 * https://reviews.freebsd.org/D2742
	 * XXX: Can be removed as soon as r284483 is MFC'd.
	 */
	if ($user['bcrypt-hash'][2] == "y") {
		$user['bcrypt-hash'][2] = "b";
	}

	// Converts ascii to unicode.
	$astr = (string) $password;
	$ustr = '';
	for ($i = 0; $i < strlen($astr); $i++) {
		$a = ord($astr{$i}) << 8;
		$ustr .= sprintf("%X", $a);
	}

}

function local_user_get_groups($user, $all = false) {
	global $debug, $config;

	$groups = array();
	if (!is_array($config['system']['group'])) {
		return $groups;
	}

	foreach ($config['system']['group'] as $group) {
		if ($all || (!$all && ($group['name'] != "all"))) {
			if (is_array($group['member'])) {
				if (in_array($user['uid'], $group['member'])) {
					$groups[] = $group['name'];
				}
			}
		}
	}

	if ($all) {
		$groups[] = "all";
	}

	sort($groups);

	return $groups;

}

function local_user_set_groups($user, $new_groups = NULL) {
	global $debug, $config, $groupindex;

	if (!is_array($config['system']['group'])) {
		return;
	}

	$cur_groups = local_user_get_groups($user, true);
	$mod_groups = array();

	if (!is_array($new_groups)) {
		$new_groups = array();
	}

	if (!is_array($cur_groups)) {
		$cur_groups = array();
	}

	/* determine which memberships to add */
	foreach ($new_groups as $groupname) {
		if ($groupname == '' || in_array($groupname, $cur_groups)) {
			continue;
		}
		$group = & $config['system']['group'][$groupindex[$groupname]];
		$group['member'][] = $user['uid'];
		$mod_groups[] = $group;
	}
	unset($group);

	/* determine which memberships to remove */
	foreach ($cur_groups as $groupname) {
		if (in_array($groupname, $new_groups)) {
			continue;
		}
		if (!isset($config['system']['group'][$groupindex[$groupname]])) {
			continue;
		}
		$group = & $config['system']['group'][$groupindex[$groupname]];
		if (is_array($group['member'])) {
			$index = array_search($user['uid'], $group['member']);
			array_splice($group['member'], $index, 1);
			$mod_groups[] = $group;
		}
	}
	unset($group);

	/* sync all modified groups */
	foreach ($mod_groups as $group) {
		local_group_set($group);
	}
}

function local_group_del_user($user) {
	global $config;

	if (!is_array($config['system']['group'])) {
		return;
	}

	foreach ($config['system']['group'] as $group) {
		if (is_array($group['member'])) {
			foreach ($group['member'] as $idx => $uid) {
				if ($user['uid'] == $uid) {
					unset($config['system']['group']['member'][$idx]);
				}
			}
		}
	}
}

function local_group_set($group, $reset = false) {
	global $debug;

	$group_name = $group['name'];
	$group_gid = $group['gid'];
	$group_members = '';
	if (!$reset && !empty($group['member']) && count($group['member']) > 0) {
		$group_members = implode(",", $group['member']);
	}

	if (empty($group_name)) {
		return;
	}

	/* read from group db */
	$fd = popen("/usr/sbin/pw groupshow {$group_name} 2>&1", "r");
	$pwread = fgets($fd);
	pclose($fd);

	/* determine add or mod */
	if (!strncmp($pwread, "pw:", 3)) {
		$group_op = "groupadd";
	} else {
		$group_op = "groupmod";
	}

	/* add or mod group db */
	$cmd = "/usr/sbin/pw {$group_op} {$group_name} -g {$group_gid} -M '{$group_members}' 2>&1";

	if ($debug) {
		log_error(sprintf(gettext("Running: %s"), $cmd));
	}
	mwexec($cmd);

}

function local_group_del($group) {
	global $debug;

	/* delete from group db */
	$cmd = "/usr/sbin/pw groupdel {$group['name']}";

	if ($debug) {
		log_error(sprintf(gettext("Running: %s"), $cmd));
	}
	mwexec($cmd);
}

function ldap_test_connection($authcfg) {
	global $debug, $config, $g;

	if ($authcfg) {
		if (strstr($authcfg['ldap_urltype'], "Standard")) {
			$ldapproto = "ldap";
		} else {
			$ldapproto = "ldaps";
		}
		$ldapserver = "{$ldapproto}://" . ldap_format_host($authcfg['host']);
		$ldapport = $authcfg['ldap_port'];
		if (!empty($ldapport)) {
			$ldapserver .= ":{$ldapport}";
		}
		$ldapbasedn = $authcfg['ldap_basedn'];
		$ldapbindun = $authcfg['ldap_binddn'];
		$ldapbindpw = $authcfg['ldap_bindpw'];
	} else {
		return false;
	}

	/* first check if there is even an LDAP server populated */
	if (!$ldapserver) {
		return false;
	}

	/* Setup CA environment if needed. */
	ldap_setup_caenv($authcfg);

	/* connect and see if server is up */
	$error = false;
	if (!($ldap = ldap_connect($ldapserver))) {
		$error = true;
	}

	if ($error == true) {
		log_error(sprintf(gettext("ERROR!  Could not connect to server %s."), $ldapname));
		return false;
	}

	return true;
}

function ldap_setup_caenv($authcfg) {
	global $g;
	require_once("certs.inc");

	unset($caref);
	if (empty($authcfg['ldap_caref']) || !strstr($authcfg['ldap_urltype'], "SSL")) {
		putenv('LDAPTLS_REQCERT=never');
		return;
	} else {
		$caref = lookup_ca($authcfg['ldap_caref']);
		if (!$caref) {
			log_error(sprintf(gettext("LDAP: Could not lookup CA by reference for host %s."), $authcfg['ldap_caref']));
			/* XXX: Prevent for credential leaking since we cannot setup the CA env. Better way? */
			putenv('LDAPTLS_REQCERT=hard');
			return;
		}
		if (!is_dir("{$g['varrun_path']}/certs")) {
			@mkdir("{$g['varrun_path']}/certs");
		}
		if (file_exists("{$g['varrun_path']}/certs/{$caref['refid']}.ca")) {
			@unlink("{$g['varrun_path']}/certs/{$caref['refid']}.ca");
		}
		file_put_contents("{$g['varrun_path']}/certs/{$caref['refid']}.ca", base64_decode($caref['crt']));
		@chmod("{$g['varrun_path']}/certs/{$caref['refid']}.ca", 0600);
		putenv('LDAPTLS_REQCERT=hard');
		/* XXX: Probably even the hashed link should be created for this? */
		putenv("LDAPTLS_CACERTDIR={$g['varrun_path']}/certs");
		putenv("LDAPTLS_CACERT={$g['varrun_path']}/certs/{$caref['refid']}.ca");
	}
}

function ldap_test_bind($authcfg) {
	global $debug, $config, $g;

	if ($authcfg) {
		if (strstr($authcfg['ldap_urltype'], "Standard")) {
			$ldapproto = "ldap";
		} else {
			$ldapproto = "ldaps";
		}
		$ldapserver = "{$ldapproto}://" . ldap_format_host($authcfg['host']);
		$ldapport = $authcfg['ldap_port'];
		if (!empty($ldapport)) {
			$ldapserver .= ":{$ldapport}";
		}
		$ldapbasedn = $authcfg['ldap_basedn'];
		$ldapbindun = $authcfg['ldap_binddn'];
		$ldapbindpw = $authcfg['ldap_bindpw'];
		$ldapver = $authcfg['ldap_protver'];
		$ldaptimeout = is_numeric($authcfg['ldap_timeout']) ? $authcfg['ldap_timeout'] : 25;
		if (empty($ldapbndun) || empty($ldapbindpw)) {
			$ldapanon = true;
		} else {
			$ldapanon = false;
		}
	} else {
		return false;
	}

	/* first check if there is even an LDAP server populated */
	if (!$ldapserver) {
		return false;
	}

	/* Setup CA environment if needed. */
	ldap_setup_caenv($authcfg);

	/* connect and see if server is up */
	$error = false;
	if (!($ldap = ldap_connect($ldapserver))) {
		$error = true;
	}

	if ($error == true) {
		log_error(sprintf(gettext("ERROR!  Could not connect to server %s."), $ldapname));
		return false;
	}

	ldap_set_option($ldap, LDAP_OPT_REFERRALS, 0);
	ldap_set_option($ldap, LDAP_OPT_DEREF, LDAP_DEREF_SEARCHING);
	ldap_set_option($ldap, LDAP_OPT_PROTOCOL_VERSION, (int)$ldapver);
	ldap_set_option($ldap, LDAP_OPT_TIMELIMIT, (int)$ldaptimeout);
	ldap_set_option($ldap, LDAP_OPT_NETWORK_TIMEOUT, (int)$ldaptimeout);

	$ldapbindun = isset($authcfg['ldap_utf8']) ? utf8_encode($ldapbindun) : $ldapbindun;
	$ldapbindpw = isset($authcfg['ldap_utf8']) ? utf8_encode($ldapbindpw) : $ldapbindpw;
	if ($ldapanon == true) {
		if (!($res = @ldap_bind($ldap))) {
			@ldap_close($ldap);
			return false;
		}
	} else if (!($res = @ldap_bind($ldap, $ldapbindun, $ldapbindpw))) {
		@ldap_close($ldap);
		return false;
	}

	@ldap_unbind($ldap);

	return true;
}

function ldap_get_user_ous($show_complete_ou=true, $authcfg) {
	global $debug, $config, $g;

	if (!function_exists("ldap_connect")) {
		return;
	}

	$ous = array();

	if ($authcfg) {
		if (strstr($authcfg['ldap_urltype'], "Standard")) {
			$ldapproto = "ldap";
		} else {
			$ldapproto = "ldaps";
		}
		$ldapserver = "{$ldapproto}://" . ldap_format_host($authcfg['host']);
		$ldapport = $authcfg['ldap_port'];
		if (!empty($ldapport)) {
			$ldapserver .= ":{$ldapport}";
		}
		$ldapbasedn = $authcfg['ldap_basedn'];
		$ldapbindun = $authcfg['ldap_binddn'];
		$ldapbindpw = $authcfg['ldap_bindpw'];
		$ldapver = $authcfg['ldap_protver'];
		if (empty($ldapbindun) || empty($ldapbindpw)) {
			$ldapanon = true;
		} else {
			$ldapanon = false;
		}
		$ldapname = $authcfg['name'];
		$ldapfallback = false;
		$ldapscope = $authcfg['ldap_scope'];
		$ldaptimeout = is_numeric($authcfg['ldap_timeout']) ? $authcfg['ldap_timeout'] : 25;
	} else {
		return false;
	}

	/* first check if there is even an LDAP server populated */
	if (!$ldapserver) {
		log_error(gettext("ERROR!  ldap_get_user_ous() backed selected with no LDAP authentication server defined."));
		return $ous;
	}

	/* Setup CA environment if needed. */
	ldap_setup_caenv($authcfg);

	/* connect and see if server is up */
	$error = false;
	if (!($ldap = ldap_connect($ldapserver))) {
		$error = true;
	}

	if ($error == true) {
		log_error(sprintf(gettext("ERROR!  Could not connect to server %s."), $ldapname));
		return $ous;
	}

	$ldapfilter = "(|(ou=*)(cn=Users))";

	ldap_set_option($ldap, LDAP_OPT_REFERRALS, 0);
	ldap_set_option($ldap, LDAP_OPT_DEREF, LDAP_DEREF_SEARCHING);
	ldap_set_option($ldap, LDAP_OPT_PROTOCOL_VERSION, (int)$ldapver);
	ldap_set_option($ldap, LDAP_OPT_TIMELIMIT, (int)$ldaptimeout);
	ldap_set_option($ldap, LDAP_OPT_NETWORK_TIMEOUT, (int)$ldaptimeout);

	$ldapbindun = isset($authcfg['ldap_utf8']) ? utf8_encode($ldapbindun) : $ldapbindun;
	$ldapbindpw = isset($authcfg['ldap_utf8']) ? utf8_encode($ldapbindpw) : $ldapbindpw;
	if ($ldapanon == true) {
		if (!($res = @ldap_bind($ldap))) {
			log_error(sprintf(gettext("ERROR! ldap_get_user_ous() could not bind anonymously to server %s."), $ldapname));
			@ldap_close($ldap);
			return $ous;
		}
	} else if (!($res = @ldap_bind($ldap, $ldapbindun, $ldapbindpw))) {
		log_error(sprintf(gettext("ERROR! ldap_get_user_ous() could not bind to server %s."), $ldapname));
		@ldap_close($ldap);
		return $ous;
	}

	if ($ldapscope == "one") {
		$ldapfunc = "ldap_list";
	} else {
		$ldapfunc = "ldap_search";
	}

	$search = @$ldapfunc($ldap, $ldapbasedn, $ldapfilter);
	$info = @ldap_get_entries($ldap, $search);

	if (is_array($info)) {
		foreach ($info as $inf) {
			if (!$show_complete_ou) {
				$inf_split = explode(",", $inf['dn']);
				$ou = $inf_split[0];
				$ou = str_replace("OU=", "", $ou);
				$ou = str_replace("CN=", "", $ou);
			} else {
				if ($inf['dn']) {
					$ou = $inf['dn'];
				}
			}
			if ($ou) {
				$ous[] = $ou;
			}
		}
	}

	@ldap_unbind($ldap);

	return $ous;
}

function ldap_get_groups($username, $authcfg) {
	global $debug, $config;

	if (!function_exists("ldap_connect")) {
		return;
	}

	if (!$username) {
		return false;
	}

	if (!isset($authcfg['ldap_nostrip_at']) && stristr($username, "@")) {
		$username_split = explode("@", $username);
		$username = $username_split[0];
	}

	if (stristr($username, "\\")) {
		$username_split = explode("\\", $username);
		$username = $username_split[0];
	}

	//log_error("Getting LDAP groups for {$username}.");
	if ($authcfg) {
		if (strstr($authcfg['ldap_urltype'], "Standard")) {
			$ldapproto = "ldap";
		} else {
			$ldapproto = "ldaps";
		}
		$ldapserver = "{$ldapproto}://" . ldap_format_host($authcfg['host']);
		$ldapport = $authcfg['ldap_port'];
		if (!empty($ldapport)) {
			$ldapserver .= ":{$ldapport}";
		}
		$ldapbasedn = $authcfg['ldap_basedn'];
		$ldapbindun = $authcfg['ldap_binddn'];
		$ldapbindpw = $authcfg['ldap_bindpw'];
		$ldapauthcont = $authcfg['ldap_authcn'];
		$ldapnameattribute = strtolower($authcfg['ldap_attr_user']);
		$ldapgroupattribute = strtolower($authcfg['ldap_attr_member']);
		if (isset($authcfg['ldap_rfc2307'])) {
			$ldapfilter         = "(&(objectClass={$authcfg['ldap_attr_groupobj']})({$ldapgroupattribute}={$username}))";
		} else {
			$ldapfilter         = "({$ldapnameattribute}={$username})";
		}
		$ldaptype = "";
		$ldapver = $authcfg['ldap_protver'];
		if (empty($ldapbindun) || empty($ldapbindpw)) {
			$ldapanon = true;
		} else {
			$ldapanon = false;
		}
		$ldapname = $authcfg['name'];
		$ldapfallback = false;
		$ldapscope = $authcfg['ldap_scope'];
		$ldaptimeout = is_numeric($authcfg['ldap_timeout']) ? $authcfg['ldap_timeout'] : 25;
	} else {
		return false;
	}

	if (isset($authcfg['ldap_rfc2307'])) {
		$ldapdn = $ldapbasedn;
	} else {
		$ldapdn = $_SESSION['ldapdn'];
	}

	/*Convert attribute to lowercase.  php ldap arrays put everything in lowercase */
	$ldapgroupattribute = strtolower($ldapgroupattribute);
	$memberof = array();

	/* Setup CA environment if needed. */
	ldap_setup_caenv($authcfg);

	/* connect and see if server is up */
	$error = false;
	if (!($ldap = ldap_connect($ldapserver))) {
		$error = true;
	}

	if ($error == true) {
		log_error(sprintf(gettext("ERROR! ldap_get_groups() Could not connect to server %s."), $ldapname));
		return memberof;
	}

	ldap_set_option($ldap, LDAP_OPT_REFERRALS, 0);
	ldap_set_option($ldap, LDAP_OPT_DEREF, LDAP_DEREF_SEARCHING);
	ldap_set_option($ldap, LDAP_OPT_PROTOCOL_VERSION, (int)$ldapver);
	ldap_set_option($ldap, LDAP_OPT_TIMELIMIT, (int)$ldaptimeout);
	ldap_set_option($ldap, LDAP_OPT_NETWORK_TIMEOUT, (int)$ldaptimeout);

	/* bind as user that has rights to read group attributes */
	$ldapbindun = isset($authcfg['ldap_utf8']) ? utf8_encode($ldapbindun) : $ldapbindun;
	$ldapbindpw = isset($authcfg['ldap_utf8']) ? utf8_encode($ldapbindpw) : $ldapbindpw;
	if ($ldapanon == true) {
		if (!($res = @ldap_bind($ldap))) {
			log_error(sprintf(gettext("ERROR! ldap_get_groups() could not bind anonymously to server %s."), $ldapname));
			@ldap_close($ldap);
			return false;
		}
	} else if (!($res = @ldap_bind($ldap, $ldapbindun, $ldapbindpw))) {
		log_error(sprintf(gettext("ERROR! ldap_get_groups() could not bind to server %s."), $ldapname));
		@ldap_close($ldap);
		return memberof;
	}

	/* get groups from DN found */
	/* use ldap_read instead of search so we don't have to do a bunch of extra work */
	/* since we know the DN is in $_SESSION['ldapdn'] */
	//$search    = ldap_read($ldap, $ldapdn, "(objectclass=*)", array($ldapgroupattribute));
	if ($ldapscope == "one") {
		$ldapfunc = "ldap_list";
	} else {
		$ldapfunc = "ldap_search";
	}

	$search = @$ldapfunc($ldap, $ldapdn, $ldapfilter, array($ldapgroupattribute));
	$info = @ldap_get_entries($ldap, $search);

	$gresults = isset($authcfg['ldap_rfc2307']) ? $info : $info[0][$ldapgroupattribute];

	if (is_array($gresults)) {
		/* Iterate through the groups and throw them into an array */
		foreach ($gresults as $grp) {
			if (((isset($authcfg['ldap_rfc2307'])) && (stristr($grp["dn"], "CN=") !== false)) ||
			    ((!isset($authcfg['ldap_rfc2307'])) && (stristr($grp, "CN=") !== false))) {
				$grpsplit = isset($authcfg['ldap_rfc2307']) ? explode(",", $grp["dn"]) : explode(",", $grp);
				$memberof[] = preg_replace("/CN=/i", "", $grpsplit[0]);
			}
		}
	}

	/* Time to close LDAP connection */
	@ldap_unbind($ldap);

	$groups = print_r($memberof, true);

	//log_error("Returning groups ".$groups." for user $username");

	return $memberof;
}

function ldap_format_host($host) {
	return is_ipaddrv6($host) ? "[$host]" : $host ;
}

function ldap_backed($username, $passwd, $authcfg) {
	global $debug, $config;

	if (!$username) {
		return;
	}

	if (!function_exists("ldap_connect")) {
		return;
	}

	if (!isset($authcfg['ldap_nostrip_at']) && stristr($username, "@")) {
		$username_split = explode("@", $username);
		$username = $username_split[0];
	}
	if (stristr($username, "\\")) {
		$username_split = explode("\\", $username);
		$username = $username_split[0];
	}

	if ($authcfg) {
		if (strstr($authcfg['ldap_urltype'], "Standard")) {
			$ldapproto = "ldap";
		} else {
			$ldapproto = "ldaps";
		}
		$ldapserver = "{$ldapproto}://" . ldap_format_host($authcfg['host']);
		$ldapport = $authcfg['ldap_port'];
		if (!empty($ldapport)) {
			$ldapserver .= ":{$ldapport}";
		}
		$ldapbasedn = $authcfg['ldap_basedn'];
		$ldapbindun = $authcfg['ldap_binddn'];
		$ldapbindpw = $authcfg['ldap_bindpw'];
		if (empty($ldapbindun) || empty($ldapbindpw)) {
			$ldapanon = true;
		} else {
			$ldapanon = false;
		}
		$ldapauthcont = $authcfg['ldap_authcn'];
		$ldapnameattribute = strtolower($authcfg['ldap_attr_user']);
		$ldapextendedqueryenabled = $authcfg['ldap_extended_enabled'];
		$ldapextendedquery = $authcfg['ldap_extended_query'];
		$ldapfilter = "";
		if (!$ldapextendedqueryenabled) {
			$ldapfilter = "({$ldapnameattribute}={$username})";
		} else {
			$ldapfilter = "(&({$ldapnameattribute}={$username})({$ldapextendedquery}))";
		}
		$ldaptype = "";
		$ldapver = $authcfg['ldap_protver'];
		$ldapname = $authcfg['name'];
		$ldapscope = $authcfg['ldap_scope'];
		$ldaptimeout = is_numeric($authcfg['ldap_timeout']) ? $authcfg['ldap_timeout'] : 25;
	} else {
		return false;
	}

	/* first check if there is even an LDAP server populated */
	if (!$ldapserver) {
		if ($ldapfallback) {
			log_error(gettext("ERROR! ldap_backed() called with no LDAP authentication server defined.  Defaulting to local user database. Visit System -> User Manager."));
			return local_backed($username, $passwd);
		} else {
			log_error(gettext("ERROR! ldap_backed() called with no LDAP authentication server defined."));
		}

		return false;
	}

	/* Setup CA environment if needed. */
	ldap_setup_caenv($authcfg);

	ldap_set_option($ldap, LDAP_OPT_REFERRALS, 0);
	ldap_set_option($ldap, LDAP_OPT_DEREF, LDAP_DEREF_SEARCHING);
	ldap_set_option($ldap, LDAP_OPT_PROTOCOL_VERSION, (int)$ldapver);
	ldap_set_option($ldap, LDAP_OPT_TIMELIMIT, (int)$ldaptimeout);
	ldap_set_option($ldap, LDAP_OPT_NETWORK_TIMEOUT, (int)$ldaptimeout);

	/* Make sure we can connect to LDAP */
	$error = false;
	if (!($ldap = ldap_connect($ldapserver))) {
		$error = true;
	}

	if ($error == true) {
		log_error(sprintf(gettext("ERROR!  Could not connect to server %s."), $ldapname));
		return false;
	}

	/* ok, its up.  now, lets bind as the bind user so we can search it */
	$error = false;
	$ldapbindun = isset($authcfg['ldap_utf8']) ? utf8_encode($ldapbindun) : $ldapbindun;
	$ldapbindpw = isset($authcfg['ldap_utf8']) ? utf8_encode($ldapbindpw) : $ldapbindpw;
	if ($ldapanon == true) {
		if (!($res = @ldap_bind($ldap))) {
			$error = true;
		}
	} else if (!($res = @ldap_bind($ldap, $ldapbindun, $ldapbindpw))) {
		$error = true;
	}

	if ($error == true) {
		@ldap_close($ldap);
		log_error(sprintf(gettext("ERROR! Could not bind to server %s."), $ldapname));
		return false;
	}

	/* Get LDAP Authcontainers and split em up. */
	$ldac_splits = explode(";", $ldapauthcont);

	/* setup the usercount so we think we haven't found anyone yet */
	$usercount = 0;

	/*****************************************************************/
	/*  We first find the user based on username and filter          */
	/*  then, once we find the first occurrence of that person       */
	/*  we set session variables to point to the OU and DN of the    */
	/*  person.  To later be used by ldap_get_groups.                */
	/*  that way we don't have to search twice.                      */
	/*****************************************************************/
	if ($debug) {
		log_auth(sprintf(gettext("Now Searching for %s in directory."), $username));
	}
	/* Iterate through the user containers for search */
	foreach ($ldac_splits as $i => $ldac_split) {
		$ldac_split = isset($authcfg['ldap_utf8']) ? utf8_encode($ldac_split) : $ldac_split;
		$ldapfilter = isset($authcfg['ldap_utf8']) ? utf8_encode($ldapfilter) : $ldapfilter;
		$ldapsearchbasedn = isset($authcfg['ldap_utf8']) ? utf8_encode("{$ldac_split},{$ldapbasedn}") : "{$ldac_split},{$ldapbasedn}";
		/* Make sure we just use the first user we find */
		if ($debug) {
			log_auth(sprintf(gettext('Now Searching in server %1$s, container %2$s with filter %3$s.'), $ldapname, utf8_decode($ldac_split), utf8_decode($ldapfilter)));
		}
		if ($ldapscope == "one") {
			$ldapfunc = "ldap_list";
		} else {
			$ldapfunc = "ldap_search";
		}
		/* Support legacy auth container specification. */
		if (stristr($ldac_split, "DC=") || empty($ldapbasedn)) {
			$search = @$ldapfunc($ldap, $ldac_split, $ldapfilter);
		} else {
			$search = @$ldapfunc($ldap, $ldapsearchbasedn, $ldapfilter);
		}
		if (!$search) {
			log_error(sprintf(gettext("Search resulted in error: %s"), ldap_error($ldap)));
			continue;
		}
		$info = ldap_get_entries($ldap, $search);
		$matches = $info['count'];
		if ($matches == 1) {
			$userdn = $_SESSION['ldapdn'] = $info[0]['dn'];
			$_SESSION['ldapou'] = $ldac_split[$i];
			$_SESSION['ldapon'] = "true";
			$usercount = 1;
			break;
		}
	}

	if ($usercount != 1) {
		@ldap_unbind($ldap);
		log_error(gettext("ERROR! Either LDAP search failed, or multiple users were found."));
		return false;
	}

	/* Now lets bind as the user we found */
	$passwd = isset($authcfg['ldap_utf8']) ? utf8_encode($passwd) : $passwd;
	if (!($res = @ldap_bind($ldap, $userdn, $passwd))) {
		log_error(sprintf(gettext('ERROR! Could not login to server %1$s as user %2$s: %3$s'), $ldapname, $username, ldap_error($ldap)));
		@ldap_unbind($ldap);
		return false;
	}

	if ($debug) {
		$userdn = isset($authcfg['ldap_utf8']) ? utf8_decode($userdn) : $userdn;
		log_auth(sprintf(gettext('Logged in successfully as %1$s via LDAP server %2$s with DN = %3$s.'), $username, $ldapname, $userdn));
	}

	/* At this point we are bound to LDAP so the user was auth'd okay. Close connection. */
	@ldap_unbind($ldap);

	return true;
}

function radius_backed($username, $passwd, $authcfg, &$attributes = array()) {
	global $debug, $config;
	$ret = false;

	require_once("radius.inc");

	$rauth = new Auth_RADIUS_PAP($username, $passwd);
	if ($authcfg) {
		$radiusservers = array();
		$radiusservers[0]['ipaddr'] = $authcfg['host'];
		$radiusservers[0]['port'] = $authcfg['radius_auth_port'];
		$radiusservers[0]['sharedsecret'] = $authcfg['radius_secret'];
		$radiusservers[0]['timeout'] = $authcfg['radius_timeout'];
	} else {
		return false;
	}

	/* Add new servers to our instance */
	foreach ($radiusservers as $radsrv) {
		$timeout = (is_numeric($radsrv['timeout'])) ? $radsrv['timeout'] : 5;
		$rauth->addServer($radsrv['ipaddr'], $radsrv['port'], $radsrv['sharedsecret'], $timeout);
	}

	if (PEAR::isError($rauth->start())) {
		$retvalue['auth_val'] = 1;
		$retvalue['error'] = $rauth->getError();
		if ($debug) {
			printf(gettext("Radius start: %s<br />\n"), $retvalue['error']);
		}
	}

	// XXX - billm - somewhere in here we need to handle securid challenge/response

	/* Send request */
	$result = $rauth->send();
	if (PEAR::isError($result)) {
		$retvalue['auth_val'] = 1;
		$retvalue['error'] = $result->getMessage();
		if ($debug) {
			printf(gettext("Radius send failed: %s<br />\n"), $retvalue['error']);
		}
	} else if ($result === true) {
		if ($rauth->getAttributes()) {
			$attributes = $rauth->listAttributes();
		}
		$retvalue['auth_val'] = 2;
		if ($debug) {
			printf(gettext("Radius Auth succeeded")."<br />\n");
		}
		$ret = true;
	} else {
		$retvalue['auth_val'] = 3;
		if ($debug) {
			printf(gettext("Radius Auth rejected")."<br />\n");
		}
	}

	// close OO RADIUS_AUTHENTICATION
	$rauth->close();

	return $ret;
}

/*
	$attributes must contain a "class" key containing the groups and local
	groups must exist to match.
*/
function radius_get_groups($attributes) {
	$groups = array();
	if (!empty($attributes) && is_array($attributes) && !empty($attributes['class'])) {
		$groups = explode(";", $attributes['class']);
		foreach ($groups as & $grp) {
			$grp = trim($grp);
			if (strtolower(substr($grp, 0, 3)) == "ou=") {
				$grp = substr($grp, 3);
			}
		}
	}
	return $groups;
}

function get_user_expiration_date($username) {
	$user = getUserEntry($username);
	if ($user['expires']) {
		return $user['expires'];
	}
}

function is_account_expired($username) {
	$expirydate = get_user_expiration_date($username);
	if ($expirydate) {
		if (strtotime("-1 day") > strtotime(date("m/d/Y", strtotime($expirydate)))) {
			return true;
		}
	}

	return false;
}

function is_account_disabled($username) {
	$user = getUserEntry($username);
	if (isset($user['disabled'])) {
		return true;
	}

	return false;
}

function auth_get_authserver($name) {
	global $config;

	if (is_array($config['system']['authserver'])) {
		foreach ($config['system']['authserver'] as $authcfg) {
			if ($authcfg['name'] == $name) {
				return $authcfg;
			}
		}
	}
	if ($name == "Local Database") {
		return array("name" => gettext("Local Database"), "type" => "Local Auth", "host" => $config['system']['hostname']);
	}
}

function auth_get_authserver_list() {
	global $config;

	$list = array();

	if (is_array($config['system']['authserver'])) {
		foreach ($config['system']['authserver'] as $authcfg) {
			/* Add support for disabled entries? */
			$list[$authcfg['name']] = $authcfg;
		}
	}

	$list["Local Database"] = array("name" => gettext("Local Database"), "type" => "Local Auth", "host" => $config['system']['hostname']);
	return $list;
}

function getUserGroups($username, $authcfg, &$attributes = array()) {
	global $config;

	$allowed_groups = array();

	switch ($authcfg['type']) {
		case 'ldap':
			$allowed_groups = @ldap_get_groups($username, $authcfg);
			break;
		case 'radius':
			$allowed_groups = @radius_get_groups($attributes);
			break;
		default:
			$user = getUserEntry($username);
			$allowed_groups = @local_user_get_groups($user, true);
			break;
	}

	$member_groups = array();
	if (is_array($config['system']['group'])) {
		foreach ($config['system']['group'] as $group) {
			if (in_array($group['name'], $allowed_groups)) {
				$member_groups[] = $group['name'];
			}
		}
	}

	return $member_groups;
}

function authenticate_user($username, $password, $authcfg = NULL, &$attributes = array()) {

	if (!$authcfg) {
		return local_backed($username, $password);
	}

	$authenticated = false;
	switch ($authcfg['type']) {
		case 'ldap':
			if (ldap_backed($username, $password, $authcfg)) {
				$authenticated = true;
			}
			break;
		case 'radius':
			if (radius_backed($username, $password, $authcfg, $attributes)) {
				$authenticated = true;
			}
			break;
		default:
			/* lookup user object by name */
			if (local_backed($username, $password)) {
				$authenticated = true;
			}
			break;
		}

	return $authenticated;
}

function session_auth() {
	global $config, $_SESSION, $page;

	// Handle HTTPS httponly and secure flags
	$currentCookieParams = session_get_cookie_params();
	session_set_cookie_params(
		$currentCookieParams["lifetime"],
		$currentCookieParams["path"],
		NULL,
		($config['system']['webgui']['protocol'] == "https"),
		true
	);

	if (!session_id()) {
		session_start();
	}

	// Detect protocol change
	if (!isset($_POST['login']) && !empty($_SESSION['Logged_In']) && $_SESSION['protocol'] != $config['system']['webgui']['protocol']) {
		return false;
	}

	/* Validate incoming login request */
	$attributes = array();
	if (isset($_POST['login']) && !empty($_POST['usernamefld']) && !empty($_POST['passwordfld'])) {
		$authcfg = auth_get_authserver($config['system']['webgui']['authmode']);
		if (authenticate_user($_POST['usernamefld'], $_POST['passwordfld'], $authcfg, $attributes) ||
		    authenticate_user($_POST['usernamefld'], $_POST['passwordfld'])) {
			// Generate a new id to avoid session fixation
			session_regenerate_id();
			$_SESSION['Logged_In'] = "True";
			$_SESSION['Username'] = $_POST['usernamefld'];
			$_SESSION['user_radius_attributes'] = $attributes;
			$_SESSION['last_access'] = time();
			$_SESSION['protocol'] = $config['system']['webgui']['protocol'];
			if (!isset($config['system']['webgui']['quietlogin'])) {
				log_auth(sprintf(gettext("Successful login for user '%1\$s' from: %2\$s"), $_POST['usernamefld'], $_SERVER['REMOTE_ADDR']));
			}
			if (isset($_POST['postafterlogin'])) {
				return true;
			} else {
				if (empty($page)) {
					$page = "/";
				}
				header("Location: {$page}");
			}
			exit;
		} else {
			/* give the user an error message */
			$_SESSION['Login_Error'] = "Username or Password incorrect";
			log_auth("webConfigurator authentication error for '{$_POST['usernamefld']}' from {$_SERVER['REMOTE_ADDR']}");
			if (isAjax()) {
				echo "showajaxmessage('{$_SESSION['Login_Error']}');";
				return;
			}
		}
	}

	/* Show login page if they aren't logged in */
	if (empty($_SESSION['Logged_In'])) {
		return false;
	}

	/* If session timeout isn't set, we don't mark sessions stale */
	if (!isset($config['system']['webgui']['session_timeout'])) {
		/* Default to 4 hour timeout if one is not set */
		if ($_SESSION['last_access'] < (time() - 14400)) {
			$_GET['logout'] = true;
			$_SESSION['Logout'] = true;
		} else {
			$_SESSION['last_access'] = time();
		}
	} else if (intval($config['system']['webgui']['session_timeout']) == 0) {
		/* only update if it wasn't ajax */
		if (!isAjax()) {
			$_SESSION['last_access'] = time();
		}
	} else {
		/* Check for stale session */
		if ($_SESSION['last_access'] < (time() - ($config['system']['webgui']['session_timeout'] * 60))) {
			$_GET['logout'] = true;
			$_SESSION['Logout'] = true;
		} else {
			/* only update if it wasn't ajax */
			if (!isAjax()) {
				$_SESSION['last_access'] = time();
			}
		}
	}

	/* user hit the logout button */
	if (isset($_GET['logout'])) {

		if ($_SESSION['Logout']) {
			log_error(sprintf(gettext("Session timed out for user '%1\$s' from: %2\$s"), $_SESSION['Username'], $_SERVER['REMOTE_ADDR']));
		} else {
			log_error(sprintf(gettext("User logged out for user '%1\$s' from: %2\$s"), $_SESSION['Username'], $_SERVER['REMOTE_ADDR']));
		}

		/* wipe out $_SESSION */
		$_SESSION = array();

		if (isset($_COOKIE[session_name()])) {
			setcookie(session_name(), '', time()-42000, '/');
		}

		/* and destroy it */
		session_destroy();

		$scriptName = explode("/", $_SERVER["SCRIPT_FILENAME"]);
		$scriptElms = count($scriptName);
		$scriptName = $scriptName[$scriptElms-1];

		if (isAjax()) {
			return false;
		}

		/* redirect to page the user is on, it'll prompt them to login again */
		header("Location: {$scriptName}");

		return false;
	}

	/*
	 * this is for debugging purpose if you do not want to use Ajax
	 * to submit a HTML form. It basically disables the observation
	 * of the submit event and hence does not trigger Ajax.
	 */
	if ($_GET['disable_ajax']) {
		$_SESSION['NO_AJAX'] = "True";
	}

	/*
	 * Same to re-enable Ajax.
	 */
	if ($_GET['enable_ajax']) {
		unset($_SESSION['NO_AJAX']);
	}

	return true;
}

?>