658 lines
22 KiB
PHP
658 lines
22 KiB
PHP
<?php
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/**
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* ownCloud – LDAP Access
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*
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* @author Arthur Schiwon
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* @copyright 2012, 2013 Arthur Schiwon blizzz@owncloud.com
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU AFFERO GENERAL PUBLIC LICENSE
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* License as published by the Free Software Foundation; either
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* version 3 of the License, or any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU AFFERO GENERAL PUBLIC LICENSE for more details.
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*
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* You should have received a copy of the GNU Affero General Public
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* License along with this library. If not, see <http://www.gnu.org/licenses/>.
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*
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*/
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namespace OCA\user_ldap\lib;
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class Connection {
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private $ldapConnectionRes = null;
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private $configPrefix;
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private $configID;
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private $configured = false;
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//cache handler
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protected $cache;
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//settings
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protected $config = array(
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'ldapHost' => null,
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'ldapPort' => null,
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'ldapBackupHost' => null,
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'ldapBackupPort' => null,
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'ldapBase' => null,
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'ldapBaseUsers' => null,
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'ldapBaseGroups' => null,
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'ldapAgentName' => null,
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'ldapAgentPassword' => null,
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'ldapTLS' => null,
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'ldapNoCase' => null,
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'turnOffCertCheck' => null,
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'ldapIgnoreNamingRules' => null,
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'ldapUserDisplayName' => null,
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'ldapUserFilter' => null,
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'ldapGroupFilter' => null,
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'ldapGroupDisplayName' => null,
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'ldapGroupMemberAssocAttr' => null,
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'ldapLoginFilter' => null,
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'ldapQuotaAttribute' => null,
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'ldapQuotaDefault' => null,
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'ldapEmailAttribute' => null,
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'ldapCacheTTL' => null,
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'ldapUuidAttribute' => null,
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'ldapOverrideUuidAttribute' => null,
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'ldapOverrideMainServer' => false,
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'ldapConfigurationActive' => false,
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'ldapAttributesForUserSearch' => null,
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'ldapAttributesForGroupSearch' => null,
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'homeFolderNamingRule' => null,
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'hasPagedResultSupport' => false,
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'ldapExpertUsernameAttr' => null,
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'ldapExpertUUIDAttr' => null,
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);
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/**
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* @brief Constructor
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* @param $configPrefix a string with the prefix for the configkey column (appconfig table)
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* @param $configID a string with the value for the appid column (appconfig table) or null for on-the-fly connections
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*/
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public function __construct($configPrefix = '', $configID = 'user_ldap') {
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$this->configPrefix = $configPrefix;
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$this->configID = $configID;
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$this->cache = \OC_Cache::getGlobalCache();
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$this->config['hasPagedResultSupport'] = (function_exists('ldap_control_paged_result')
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&& function_exists('ldap_control_paged_result_response'));
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}
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public function __destruct() {
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if(is_resource($this->ldapConnectionRes)) {
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@ldap_unbind($this->ldapConnectionRes);
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};
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}
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public function __get($name) {
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if(!$this->configured) {
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$this->readConfiguration();
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}
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if(isset($this->config[$name])) {
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return $this->config[$name];
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}
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}
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public function __set($name, $value) {
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$changed = false;
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//only few options are writable
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if($name === 'ldapUuidAttribute') {
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\OCP\Util::writeLog('user_ldap', 'Set config ldapUuidAttribute to '.$value, \OCP\Util::DEBUG);
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$this->config[$name] = $value;
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if(!empty($this->configID)) {
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\OCP\Config::setAppValue($this->configID, $this->configPrefix.'ldap_uuid_attribute', $value);
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}
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$changed = true;
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}
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if($changed) {
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$this->validateConfiguration();
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}
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}
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/**
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* @brief initializes the LDAP backend
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* @param $force read the config settings no matter what
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*
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* initializes the LDAP backend
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*/
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public function init($force = false) {
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$this->readConfiguration($force);
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$this->establishConnection();
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}
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/**
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* Returns the LDAP handler
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*/
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public function getConnectionResource() {
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if(!$this->ldapConnectionRes) {
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$this->init();
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} else if(!is_resource($this->ldapConnectionRes)) {
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$this->ldapConnectionRes = null;
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$this->establishConnection();
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}
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if(is_null($this->ldapConnectionRes)) {
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\OCP\Util::writeLog('user_ldap', 'Connection could not be established', \OCP\Util::ERROR);
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}
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return $this->ldapConnectionRes;
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}
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private function getCacheKey($key) {
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$prefix = 'LDAP-'.$this->configID.'-'.$this->configPrefix.'-';
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if(is_null($key)) {
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return $prefix;
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}
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return $prefix.md5($key);
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}
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public function getFromCache($key) {
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if(!$this->configured) {
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$this->readConfiguration();
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}
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if(!$this->config['ldapCacheTTL']) {
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return null;
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}
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if(!$this->isCached($key)) {
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return null;
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}
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$key = $this->getCacheKey($key);
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return unserialize(base64_decode($this->cache->get($key)));
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}
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public function isCached($key) {
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if(!$this->configured) {
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$this->readConfiguration();
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}
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if(!$this->config['ldapCacheTTL']) {
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return false;
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}
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$key = $this->getCacheKey($key);
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return $this->cache->hasKey($key);
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}
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public function writeToCache($key, $value) {
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if(!$this->configured) {
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$this->readConfiguration();
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}
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if(!$this->config['ldapCacheTTL']
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|| !$this->config['ldapConfigurationActive']) {
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return null;
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}
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$key = $this->getCacheKey($key);
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$value = base64_encode(serialize($value));
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$this->cache->set($key, $value, $this->config['ldapCacheTTL']);
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}
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public function clearCache() {
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$this->cache->clear($this->getCacheKey(null));
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}
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private function getValue($varname) {
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static $defaults;
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if(is_null($defaults)) {
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$defaults = $this->getDefaults();
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}
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return \OCP\Config::getAppValue($this->configID,
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$this->configPrefix.$varname,
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$defaults[$varname]);
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}
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private function setValue($varname, $value) {
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\OCP\Config::setAppValue($this->configID,
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$this->configPrefix.$varname,
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$value);
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}
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/**
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* Caches the general LDAP configuration.
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*/
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private function readConfiguration($force = false) {
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if((!$this->configured || $force) && !is_null($this->configID)) {
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$v = 'getValue';
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$this->config['ldapHost'] = $this->$v('ldap_host');
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$this->config['ldapBackupHost'] = $this->$v('ldap_backup_host');
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$this->config['ldapPort'] = $this->$v('ldap_port');
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$this->config['ldapBackupPort'] = $this->$v('ldap_backup_port');
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$this->config['ldapOverrideMainServer']
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= $this->$v('ldap_override_main_server');
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$this->config['ldapAgentName'] = $this->$v('ldap_dn');
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$this->config['ldapAgentPassword']
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= base64_decode($this->$v('ldap_agent_password'));
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$rawLdapBase = $this->$v('ldap_base');
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$this->config['ldapBase']
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= preg_split('/\r\n|\r|\n/', $rawLdapBase);
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$this->config['ldapBaseUsers']
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= preg_split('/\r\n|\r|\n/', ($this->$v('ldap_base_users')));
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$this->config['ldapBaseGroups']
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= preg_split('/\r\n|\r|\n/', $this->$v('ldap_base_groups'));
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unset($rawLdapBase);
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$this->config['ldapTLS'] = $this->$v('ldap_tls');
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$this->config['ldapNoCase'] = $this->$v('ldap_nocase');
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$this->config['turnOffCertCheck']
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= $this->$v('ldap_turn_off_cert_check');
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$this->config['ldapUserDisplayName']
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= mb_strtolower($this->$v('ldap_display_name'), 'UTF-8');
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$this->config['ldapUserFilter']
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= $this->$v('ldap_userlist_filter');
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$this->config['ldapGroupFilter'] = $this->$v('ldap_group_filter');
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$this->config['ldapLoginFilter'] = $this->$v('ldap_login_filter');
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$this->config['ldapGroupDisplayName']
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= mb_strtolower($this->$v('ldap_group_display_name'), 'UTF-8');
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$this->config['ldapQuotaAttribute']
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= $this->$v('ldap_quota_attr');
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$this->config['ldapQuotaDefault']
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= $this->$v('ldap_quota_def');
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$this->config['ldapEmailAttribute']
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= $this->$v('ldap_email_attr');
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$this->config['ldapGroupMemberAssocAttr']
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= $this->$v('ldap_group_member_assoc_attribute');
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$this->config['ldapIgnoreNamingRules']
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= \OCP\Config::getSystemValue('ldapIgnoreNamingRules', false);
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$this->config['ldapCacheTTL'] = $this->$v('ldap_cache_ttl');
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$this->config['ldapUuidAttribute']
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= $this->$v('ldap_uuid_attribute');
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$this->config['ldapOverrideUuidAttribute']
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= $this->$v('ldap_override_uuid_attribute');
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$this->config['homeFolderNamingRule']
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= $this->$v('home_folder_naming_rule');
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$this->config['ldapConfigurationActive']
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= $this->$v('ldap_configuration_active');
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$this->config['ldapAttributesForUserSearch']
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= preg_split('/\r\n|\r|\n/', $this->$v('ldap_attributes_for_user_search'));
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$this->config['ldapAttributesForGroupSearch']
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= preg_split('/\r\n|\r|\n/', $this->$v('ldap_attributes_for_group_search'));
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$this->config['ldapExpertUsernameAttr']
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= $this->$v('ldap_expert_username_attr');
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$this->config['ldapExpertUUIDAttr']
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= $this->$v('ldap_expert_uuid_attr');
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$this->configured = $this->validateConfiguration();
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}
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}
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/**
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* @return returns an array that maps internal variable names to database fields
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*/
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private function getConfigTranslationArray() {
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static $array = array(
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'ldap_host'=>'ldapHost',
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'ldap_port'=>'ldapPort',
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'ldap_backup_host'=>'ldapBackupHost',
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'ldap_backup_port'=>'ldapBackupPort',
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'ldap_override_main_server' => 'ldapOverrideMainServer',
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'ldap_dn'=>'ldapAgentName',
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'ldap_agent_password'=>'ldapAgentPassword',
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'ldap_base'=>'ldapBase',
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'ldap_base_users'=>'ldapBaseUsers',
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'ldap_base_groups'=>'ldapBaseGroups',
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'ldap_userlist_filter'=>'ldapUserFilter',
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'ldap_login_filter'=>'ldapLoginFilter',
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'ldap_group_filter'=>'ldapGroupFilter',
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'ldap_display_name'=>'ldapUserDisplayName',
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'ldap_group_display_name'=>'ldapGroupDisplayName',
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'ldap_tls'=>'ldapTLS',
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'ldap_nocase'=>'ldapNoCase',
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'ldap_quota_def'=>'ldapQuotaDefault',
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'ldap_quota_attr'=>'ldapQuotaAttribute',
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'ldap_email_attr'=>'ldapEmailAttribute',
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'ldap_group_member_assoc_attribute'=>'ldapGroupMemberAssocAttr',
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'ldap_cache_ttl'=>'ldapCacheTTL',
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'home_folder_naming_rule' => 'homeFolderNamingRule',
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'ldap_turn_off_cert_check' => 'turnOffCertCheck',
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'ldap_configuration_active' => 'ldapConfigurationActive',
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'ldap_attributes_for_user_search' => 'ldapAttributesForUserSearch',
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'ldap_attributes_for_group_search' => 'ldapAttributesForGroupSearch',
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'ldap_expert_username_attr' => 'ldapExpertUsernameAttr',
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'ldap_expert_uuid_attr' => 'ldapExpertUUIDAttr',
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);
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return $array;
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}
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/**
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* @brief set LDAP configuration with values delivered by an array, not read from configuration
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* @param $config array that holds the config parameters in an associated array
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* @param &$setParameters optional; array where the set fields will be given to
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* @return true if config validates, false otherwise. Check with $setParameters for detailed success on single parameters
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*/
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public function setConfiguration($config, &$setParameters = null) {
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if(!is_array($config)) {
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return false;
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}
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$params = $this->getConfigTranslationArray();
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foreach($config as $parameter => $value) {
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if(($parameter === 'homeFolderNamingRule'
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|| (isset($params[$parameter])
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&& $params[$parameter] === 'homeFolderNamingRule'))
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&& !empty($value)) {
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$value = 'attr:'.$value;
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}
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if(isset($this->config[$parameter])) {
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$this->config[$parameter] = $value;
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if(is_array($setParameters)) {
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$setParameters[] = $parameter;
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}
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} else if(isset($params[$parameter])) {
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$this->config[$params[$parameter]] = $value;
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if(is_array($setParameters)) {
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$setParameters[] = $params[$parameter];
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}
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}
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}
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$this->configured = $this->validateConfiguration();
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return $this->configured;
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}
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/**
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* @brief saves the current Configuration in the database
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*/
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public function saveConfiguration() {
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$trans = array_flip($this->getConfigTranslationArray());
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foreach($this->config as $key => $value) {
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\OCP\Util::writeLog('user_ldap', 'LDAP: storing key '.$key.' value '.$value, \OCP\Util::DEBUG);
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switch ($key) {
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case 'ldapAgentPassword':
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$value = base64_encode($value);
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break;
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case 'ldapBase':
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case 'ldapBaseUsers':
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case 'ldapBaseGroups':
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case 'ldapAttributesForUserSearch':
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case 'ldapAttributesForGroupSearch':
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if(is_array($value)) {
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$value = implode("\n", $value);
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}
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break;
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case 'ldapIgnoreNamingRules':
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case 'ldapOverrideUuidAttribute':
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case 'ldapUuidAttribute':
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case 'hasPagedResultSupport':
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continue 2;
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}
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if(is_null($value)) {
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$value = '';
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}
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$this->setValue($trans[$key], $value);
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}
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$this->clearCache();
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}
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/**
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* @brief get the current LDAP configuration
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* @return array
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*/
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public function getConfiguration() {
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$this->readConfiguration();
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$trans = $this->getConfigTranslationArray();
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$config = array();
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foreach($trans as $dbKey => $classKey) {
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if($classKey === 'homeFolderNamingRule') {
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if(strpos($this->config[$classKey], 'attr:') === 0) {
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$config[$dbKey] = substr($this->config[$classKey], 5);
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} else {
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$config[$dbKey] = '';
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}
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continue;
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} else if((strpos($classKey, 'ldapBase') !== false)
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|| (strpos($classKey, 'ldapAttributes') !== false)) {
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$config[$dbKey] = implode("\n", $this->config[$classKey]);
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continue;
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}
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$config[$dbKey] = $this->config[$classKey];
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}
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return $config;
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}
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/**
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* @brief Validates the user specified configuration
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* @returns true if configuration seems OK, false otherwise
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*/
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private function validateConfiguration() {
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// first step: "soft" checks: settings that are not really
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// necessary, but advisable. If left empty, give an info message
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if(empty($this->config['ldapBaseUsers'])) {
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\OCP\Util::writeLog('user_ldap', 'Base tree for Users is empty, using Base DN', \OCP\Util::INFO);
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$this->config['ldapBaseUsers'] = $this->config['ldapBase'];
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}
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if(empty($this->config['ldapBaseGroups'])) {
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\OCP\Util::writeLog('user_ldap', 'Base tree for Groups is empty, using Base DN', \OCP\Util::INFO);
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$this->config['ldapBaseGroups'] = $this->config['ldapBase'];
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}
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if(empty($this->config['ldapGroupFilter']) && empty($this->config['ldapGroupMemberAssocAttr'])) {
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\OCP\Util::writeLog('user_ldap',
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'No group filter is specified, LDAP group feature will not be used.',
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\OCP\Util::INFO);
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}
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$uuidAttributes = array(
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'auto', 'entryuuid', 'nsuniqueid', 'objectguid', 'guid');
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if(!in_array($this->config['ldapUuidAttribute'], $uuidAttributes)
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&& (!is_null($this->configID))) {
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\OCP\Config::setAppValue($this->configID, $this->configPrefix.'ldap_uuid_attribute', 'auto');
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\OCP\Util::writeLog('user_ldap',
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'Illegal value for the UUID Attribute, reset to autodetect.',
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\OCP\Util::INFO);
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}
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if(empty($this->config['ldapBackupPort'])) {
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//force default
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$this->config['ldapBackupPort'] = $this->config['ldapPort'];
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}
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foreach(array('ldapAttributesForUserSearch', 'ldapAttributesForGroupSearch') as $key) {
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if(is_array($this->config[$key])
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&& count($this->config[$key]) === 1
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&& empty($this->config[$key][0])) {
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$this->config[$key] = array();
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}
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}
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if((strpos($this->config['ldapHost'], 'ldaps') === 0)
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&& $this->config['ldapTLS']) {
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$this->config['ldapTLS'] = false;
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\OCP\Util::writeLog('user_ldap',
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'LDAPS (already using secure connection) and TLS do not work together. Switched off TLS.',
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\OCP\Util::INFO);
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}
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//second step: critical checks. If left empty or filled wrong, set as unconfigured and give a warning.
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$configurationOK = true;
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if(empty($this->config['ldapHost'])) {
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\OCP\Util::writeLog('user_ldap', 'No LDAP host given, won`t connect.', \OCP\Util::WARN);
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$configurationOK = false;
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}
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if(empty($this->config['ldapPort'])) {
|
||
\OCP\Util::writeLog('user_ldap', 'No LDAP Port given, won`t connect.', \OCP\Util::WARN);
|
||
$configurationOK = false;
|
||
}
|
||
if((empty($this->config['ldapAgentName']) && !empty($this->config['ldapAgentPassword']))
|
||
|| (!empty($this->config['ldapAgentName']) && empty($this->config['ldapAgentPassword']))) {
|
||
\OCP\Util::writeLog('user_ldap',
|
||
'Either no password given for the user agent or a password is given, but no LDAP agent; won`t connect.',
|
||
\OCP\Util::WARN);
|
||
$configurationOK = false;
|
||
}
|
||
//TODO: check if ldapAgentName is in DN form
|
||
if(empty($this->config['ldapBase'])
|
||
&& (empty($this->config['ldapBaseUsers'])
|
||
&& empty($this->config['ldapBaseGroups']))) {
|
||
\OCP\Util::writeLog('user_ldap', 'No Base DN given, won`t connect.', \OCP\Util::WARN);
|
||
$configurationOK = false;
|
||
}
|
||
if(empty($this->config['ldapUserDisplayName'])) {
|
||
\OCP\Util::writeLog('user_ldap',
|
||
'No user display name attribute specified, won`t connect.',
|
||
\OCP\Util::WARN);
|
||
$configurationOK = false;
|
||
}
|
||
if(empty($this->config['ldapGroupDisplayName'])) {
|
||
\OCP\Util::writeLog('user_ldap',
|
||
'No group display name attribute specified, won`t connect.',
|
||
\OCP\Util::WARN);
|
||
$configurationOK = false;
|
||
}
|
||
if(empty($this->config['ldapLoginFilter'])) {
|
||
\OCP\Util::writeLog('user_ldap', 'No login filter specified, won`t connect.', \OCP\Util::WARN);
|
||
$configurationOK = false;
|
||
}
|
||
if(mb_strpos($this->config['ldapLoginFilter'], '%uid', 0, 'UTF-8') === false) {
|
||
\OCP\Util::writeLog('user_ldap',
|
||
'Login filter does not contain %uid place holder, won`t connect.',
|
||
\OCP\Util::WARN);
|
||
\OCP\Util::writeLog('user_ldap', 'Login filter was ' . $this->config['ldapLoginFilter'], \OCP\Util::DEBUG);
|
||
$configurationOK = false;
|
||
}
|
||
|
||
if(!empty($this->config['ldapExpertUUIDAttr'])) {
|
||
$this->config['ldapUuidAttribute'] = $this->config['ldapExpertUUIDAttr'];
|
||
}
|
||
|
||
return $configurationOK;
|
||
}
|
||
|
||
/**
|
||
* @returns an associative array with the default values. Keys are correspond
|
||
* to config-value entries in the database table
|
||
*/
|
||
public function getDefaults() {
|
||
return array(
|
||
'ldap_host' => '',
|
||
'ldap_port' => '389',
|
||
'ldap_backup_host' => '',
|
||
'ldap_backup_port' => '',
|
||
'ldap_override_main_server' => '',
|
||
'ldap_dn' => '',
|
||
'ldap_agent_password' => '',
|
||
'ldap_base' => '',
|
||
'ldap_base_users' => '',
|
||
'ldap_base_groups' => '',
|
||
'ldap_userlist_filter' => 'objectClass=person',
|
||
'ldap_login_filter' => 'uid=%uid',
|
||
'ldap_group_filter' => 'objectClass=posixGroup',
|
||
'ldap_display_name' => 'cn',
|
||
'ldap_group_display_name' => 'cn',
|
||
'ldap_tls' => 1,
|
||
'ldap_nocase' => 0,
|
||
'ldap_quota_def' => '',
|
||
'ldap_quota_attr' => '',
|
||
'ldap_email_attr' => '',
|
||
'ldap_group_member_assoc_attribute' => 'uniqueMember',
|
||
'ldap_cache_ttl' => 600,
|
||
'ldap_uuid_attribute' => 'auto',
|
||
'ldap_override_uuid_attribute' => 0,
|
||
'home_folder_naming_rule' => '',
|
||
'ldap_turn_off_cert_check' => 0,
|
||
'ldap_configuration_active' => 1,
|
||
'ldap_attributes_for_user_search' => '',
|
||
'ldap_attributes_for_group_search' => '',
|
||
'ldap_expert_username_attr' => '',
|
||
'ldap_expert_uuid_attr' => '',
|
||
);
|
||
}
|
||
|
||
/**
|
||
* Connects and Binds to LDAP
|
||
*/
|
||
private function establishConnection() {
|
||
if(!$this->config['ldapConfigurationActive']) {
|
||
return null;
|
||
}
|
||
static $phpLDAPinstalled = true;
|
||
if(!$phpLDAPinstalled) {
|
||
return false;
|
||
}
|
||
if(!$this->configured) {
|
||
\OCP\Util::writeLog('user_ldap', 'Configuration is invalid, cannot connect', \OCP\Util::WARN);
|
||
return false;
|
||
}
|
||
if(!$this->ldapConnectionRes) {
|
||
if(!function_exists('ldap_connect')) {
|
||
$phpLDAPinstalled = false;
|
||
\OCP\Util::writeLog('user_ldap',
|
||
'function ldap_connect is not available. Make sure that the PHP ldap module is installed.',
|
||
\OCP\Util::ERROR);
|
||
|
||
return false;
|
||
}
|
||
if($this->config['turnOffCertCheck']) {
|
||
if(putenv('LDAPTLS_REQCERT=never')) {
|
||
\OCP\Util::writeLog('user_ldap',
|
||
'Turned off SSL certificate validation successfully.',
|
||
\OCP\Util::WARN);
|
||
} else {
|
||
\OCP\Util::writeLog('user_ldap', 'Could not turn off SSL certificate validation.', \OCP\Util::WARN);
|
||
}
|
||
}
|
||
if(!$this->config['ldapOverrideMainServer'] && !$this->getFromCache('overrideMainServer')) {
|
||
$this->doConnect($this->config['ldapHost'], $this->config['ldapPort']);
|
||
$bindStatus = $this->bind();
|
||
$error = is_resource($this->ldapConnectionRes) ? ldap_errno($this->ldapConnectionRes) : -1;
|
||
} else {
|
||
$bindStatus = false;
|
||
$error = null;
|
||
}
|
||
|
||
$error = null;
|
||
//if LDAP server is not reachable, try the Backup (Replica!) Server
|
||
if((!$bindStatus && ($error === -1))
|
||
|| $this->config['ldapOverrideMainServer']
|
||
|| $this->getFromCache('overrideMainServer')) {
|
||
$this->doConnect($this->config['ldapBackupHost'], $this->config['ldapBackupPort']);
|
||
$bindStatus = $this->bind();
|
||
if($bindStatus && $error === -1) {
|
||
//when bind to backup server succeeded and failed to main server,
|
||
//skip contacting him until next cache refresh
|
||
$this->writeToCache('overrideMainServer', true);
|
||
}
|
||
}
|
||
return $bindStatus;
|
||
}
|
||
}
|
||
|
||
private function doConnect($host, $port) {
|
||
if(empty($host)) {
|
||
return false;
|
||
}
|
||
$this->ldapConnectionRes = ldap_connect($host, $port);
|
||
if(ldap_set_option($this->ldapConnectionRes, LDAP_OPT_PROTOCOL_VERSION, 3)) {
|
||
if(ldap_set_option($this->ldapConnectionRes, LDAP_OPT_REFERRALS, 0)) {
|
||
if($this->config['ldapTLS']) {
|
||
ldap_start_tls($this->ldapConnectionRes);
|
||
}
|
||
}
|
||
}
|
||
}
|
||
|
||
/**
|
||
* Binds to LDAP
|
||
*/
|
||
public function bind() {
|
||
if(!$this->config['ldapConfigurationActive']) {
|
||
return false;
|
||
}
|
||
$cr = $this->getConnectionResource();
|
||
if(!is_resource($cr)) {
|
||
return false;
|
||
}
|
||
$ldapLogin = @ldap_bind($cr, $this->config['ldapAgentName'], $this->config['ldapAgentPassword']);
|
||
if(!$ldapLogin) {
|
||
\OCP\Util::writeLog('user_ldap',
|
||
'Bind failed: ' . ldap_errno($cr) . ': ' . ldap_error($cr),
|
||
\OCP\Util::ERROR);
|
||
$this->ldapConnectionRes = null;
|
||
return false;
|
||
}
|
||
return true;
|
||
}
|
||
|
||
}
|