nextcloud/apps/user_ldap/lib/Helper.php

312 lines
8.5 KiB
PHP
Raw Blame History

This file contains ambiguous Unicode characters

This file contains Unicode characters that might be confused with other characters. If you think that this is intentional, you can safely ignore this warning. Use the Escape button to reveal them.

<?php
/**
* @copyright Copyright (c) 2016, ownCloud, Inc.
*
* @author Arthur Schiwon <blizzz@arthur-schiwon.de>
* @author Brice Maron <brice@bmaron.net>
* @author Joas Schilling <coding@schilljs.com>
* @author Jörn Friedrich Dreyer <jfd@butonic.de>
* @author Lukas Reschke <lukas@statuscode.ch>
* @author Morris Jobke <hey@morrisjobke.de>
* @author Roeland Jago Douma <roeland@famdouma.nl>
* @author Roger Szabo <roger.szabo@web.de>
* @author root <root@localhost.localdomain>
* @author Thomas Müller <thomas.mueller@tmit.eu>
* @author Vincent Petry <pvince81@owncloud.com>
* @author Vinicius Cubas Brand <vinicius@eita.org.br>
*
* @license AGPL-3.0
*
* This code is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License, version 3,
* as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License, version 3,
* along with this program. If not, see <http://www.gnu.org/licenses/>
*
*/
namespace OCA\User_LDAP;
use OCP\IConfig;
class Helper {
/** @var IConfig */
private $config;
/**
* Helper constructor.
*
* @param IConfig $config
*/
public function __construct(IConfig $config) {
$this->config = $config;
}
/**
* returns prefixes for each saved LDAP/AD server configuration.
* @param bool $activeConfigurations optional, whether only active configuration shall be
* retrieved, defaults to false
* @return array with a list of the available prefixes
*
* Configuration prefixes are used to set up configurations for n LDAP or
* AD servers. Since configuration is stored in the database, table
* appconfig under appid user_ldap, the common identifiers in column
* 'configkey' have a prefix. The prefix for the very first server
* configuration is empty.
* Configkey Examples:
* Server 1: ldap_login_filter
* Server 2: s1_ldap_login_filter
* Server 3: s2_ldap_login_filter
*
* The prefix needs to be passed to the constructor of Connection class,
* except the default (first) server shall be connected to.
*
*/
public function getServerConfigurationPrefixes($activeConfigurations = false) {
$referenceConfigkey = 'ldap_configuration_active';
$keys = $this->getServersConfig($referenceConfigkey);
$prefixes = [];
foreach ($keys as $key) {
if ($activeConfigurations && $this->config->getAppValue('user_ldap', $key, '0') !== '1') {
continue;
}
$len = strlen($key) - strlen($referenceConfigkey);
$prefixes[] = substr($key, 0, $len);
}
return $prefixes;
}
/**
*
* determines the host for every configured connection
* @return array an array with configprefix as keys
*
*/
public function getServerConfigurationHosts() {
$referenceConfigkey = 'ldap_host';
$keys = $this->getServersConfig($referenceConfigkey);
$result = array();
foreach($keys as $key) {
$len = strlen($key) - strlen($referenceConfigkey);
$prefix = substr($key, 0, $len);
$result[$prefix] = $this->config->getAppValue('user_ldap', $key);
}
return $result;
}
/**
* return the next available configuration prefix
*
* @return string
*/
public function getNextServerConfigurationPrefix() {
$serverConnections = $this->getServerConfigurationPrefixes();
if(count($serverConnections) === 0) {
return 's01';
}
sort($serverConnections);
$lastKey = array_pop($serverConnections);
$lastNumber = intval(str_replace('s', '', $lastKey));
return 's' . str_pad($lastNumber + 1, 2, '0', STR_PAD_LEFT);
}
private function getServersConfig($value) {
$regex = '/' . $value . '$/S';
$keys = $this->config->getAppKeys('user_ldap');
$result = [];
foreach ($keys as $key) {
if (preg_match($regex, $key) === 1) {
$result[] = $key;
}
}
return $result;
}
/**
* deletes a given saved LDAP/AD server configuration.
* @param string $prefix the configuration prefix of the config to delete
* @return bool true on success, false otherwise
*/
public function deleteServerConfiguration($prefix) {
if(!in_array($prefix, self::getServerConfigurationPrefixes())) {
return false;
}
$saveOtherConfigurations = '';
if(empty($prefix)) {
$saveOtherConfigurations = 'AND `configkey` NOT LIKE \'s%\'';
}
$query = \OCP\DB::prepare('
DELETE
FROM `*PREFIX*appconfig`
WHERE `configkey` LIKE ?
'.$saveOtherConfigurations.'
AND `appid` = \'user_ldap\'
AND `configkey` NOT IN (\'enabled\', \'installed_version\', \'types\', \'bgjUpdateGroupsLastRun\')
');
$delRows = $query->execute(array($prefix.'%'));
if(\OCP\DB::isError($delRows)) {
return false;
}
if($delRows === 0) {
return false;
}
return true;
}
/**
* checks whether there is one or more disabled LDAP configurations
* @throws \Exception
* @return bool
*/
public function haveDisabledConfigurations() {
$all = $this->getServerConfigurationPrefixes(false);
$active = $this->getServerConfigurationPrefixes(true);
if(!is_array($all) || !is_array($active)) {
throw new \Exception('Unexpected Return Value');
}
return count($all) !== count($active) || count($all) === 0;
}
/**
* extracts the domain from a given URL
* @param string $url the URL
* @return string|false domain as string on success, false otherwise
*/
public function getDomainFromURL($url) {
$uinfo = parse_url($url);
if(!is_array($uinfo)) {
return false;
}
$domain = false;
if(isset($uinfo['host'])) {
$domain = $uinfo['host'];
} else if(isset($uinfo['path'])) {
$domain = $uinfo['path'];
}
return $domain;
}
/**
*
* Set the LDAPProvider in the config
*
*/
public function setLDAPProvider() {
$current = \OC::$server->getConfig()->getSystemValue('ldapProviderFactory', null);
if(is_null($current)) {
\OC::$server->getConfig()->setSystemValue('ldapProviderFactory', '\\OCA\\User_LDAP\\LDAPProviderFactory');
}
}
/**
* sanitizes a DN received from the LDAP server
* @param array $dn the DN in question
* @return array|string the sanitized DN
*/
public function sanitizeDN($dn) {
//treating multiple base DNs
if(is_array($dn)) {
$result = array();
foreach($dn as $singleDN) {
$result[] = $this->sanitizeDN($singleDN);
}
return $result;
}
//OID sometimes gives back DNs with whitespace after the comma
// a la "uid=foo, cn=bar, dn=..." We need to tackle this!
$dn = preg_replace('/([^\\\]),(\s+)/u', '\1,', $dn);
//make comparisons and everything work
$dn = mb_strtolower($dn, 'UTF-8');
//escape DN values according to RFC 2253 this is already done by ldap_explode_dn
//to use the DN in search filters, \ needs to be escaped to \5c additionally
//to use them in bases, we convert them back to simple backslashes in readAttribute()
$replacements = array(
'\,' => '\5c2C',
'\=' => '\5c3D',
'\+' => '\5c2B',
'\<' => '\5c3C',
'\>' => '\5c3E',
'\;' => '\5c3B',
'\"' => '\5c22',
'\#' => '\5c23',
'(' => '\28',
')' => '\29',
'*' => '\2A',
);
$dn = str_replace(array_keys($replacements), array_values($replacements), $dn);
return $dn;
}
/**
* converts a stored DN so it can be used as base parameter for LDAP queries, internally we store them for usage in LDAP filters
* @param string $dn the DN
* @return string
*/
public function DNasBaseParameter($dn) {
return str_ireplace('\\5c', '\\', $dn);
}
/**
* listens to a hook thrown by server2server sharing and replaces the given
* login name by a username, if it matches an LDAP user.
*
* @param array $param
* @throws \Exception
*/
public static function loginName2UserName($param) {
if(!isset($param['uid'])) {
throw new \Exception('key uid is expected to be set in $param');
}
//ain't it ironic?
$helper = new Helper(\OC::$server->getConfig());
$configPrefixes = $helper->getServerConfigurationPrefixes(true);
$ldapWrapper = new LDAP();
$ocConfig = \OC::$server->getConfig();
$notificationManager = \OC::$server->getNotificationManager();
$userSession = \OC::$server->getUserSession();
$userPluginManager = \OC::$server->query('LDAPUserPluginManager');
$userBackend = new User_Proxy(
$configPrefixes, $ldapWrapper, $ocConfig, $notificationManager, $userSession, $userPluginManager
);
$uid = $userBackend->loginName2UserName($param['uid'] );
if($uid !== false) {
$param['uid'] = $uid;
}
}
}