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|
<?php
/**
* ownCloud – LDAP Access
*
* @author Arthur Schiwon
* @copyright 2012 Arthur Schiwon blizzz@owncloud.com
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU AFFERO GENERAL PUBLIC LICENSE
* License as published by the Free Software Foundation; either
* version 3 of the License, or any later version.
*
* This library 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 along with this library. If not, see <http://www.gnu.org/licenses/>.
*
*/
namespace OCA\user_ldap\lib;
class Connection {
private $ldapConnectionRes = null;
private $configID;
private $configured = false;
//cache handler
protected $cache;
//settings
protected $config = array(
'ldapHost' => null,
'ldapPort' => null,
'ldapBase' => null,
'ldapBaseUsers' => null,
'ldapBaseGroups' => null,
'ldapAgentName' => null,
'ldapAgentPassword' => null,
'ldapTLS' => null,
'ldapNoCase' => null,
'turnOffCertCheck' => null,
'ldapIgnoreNamingRules' => null,
'ldapUserDisplayName' => null,
'ldapUserFilter' => null,
'ldapGroupFilter' => null,
'ldapGroupDisplayName' => null,
'ldapLoginFilter' => null,
'ldapQuotaAttribute' => null,
'ldapQuotaDefault' => null,
'ldapEmailAttribute' => null,
'ldapCacheTTL' => null,
'ldapUuidAttribute' => null,
'ldapOverrideUuidAttribute' => null,
'homeFolderNamingRule' => null,
);
public function __construct($configID = 'user_ldap') {
$this->configID = $configID;
$this->cache = \OC_Cache::getGlobalCache();
}
public function __destruct() {
@ldap_unbind($this->ldapConnectionRes);
}
public function __get($name) {
if(!$this->configured) {
$this->readConfiguration();
}
if(isset($this->config[$name])) {
return $this->config[$name];
}
}
public function __set($name, $value) {
$changed = false;
//omly few options are writable
if($name == 'ldapUuidAttribute') {
\OCP\Util::writeLog('user_ldap', 'Set config ldapUuidAttribute to '.$value, \OCP\Util::DEBUG);
$this->config[$name] = $value;
if(!empty($this->configID)) {
\OCP\Config::getAppValue($this->configID, 'ldap_uuid_attribute', $value);
}
$changed = true;
}
if($changed) {
$this->validateConfiguration();
}
}
/**
* @brief initializes the LDAP backend
* @param $force read the config settings no matter what
*
* initializes the LDAP backend
*/
public function init($force = false) {
$this->readConfiguration($force);
$this->establishConnection();
}
/**
* Returns the LDAP handler
*/
public function getConnectionResource() {
if(!$this->ldapConnectionRes) {
$this->init();
} else if(!is_resource($this->ldapConnectionRes)) {
$this->ldapConnectionRes = null;
$this->establishConnection();
}
if(is_null($this->ldapConnectionRes)) {
\OCP\Util::writeLog('user_ldap', 'Connection could not be established', \OCP\Util::ERROR);
}
return $this->ldapConnectionRes;
}
private function getCacheKey($key) {
$prefix = 'LDAP-'.$this->configID.'-';
if(is_null($key)) {
return $prefix;
}
return $prefix.md5($key);
}
public function getFromCache($key) {
if(!$this->configured) {
$this->readConfiguration();
}
if(!$this->config['ldapCacheTTL']) {
return null;
}
if(!$this->isCached($key)) {
return null;
}
$key = $this->getCacheKey($key);
return unserialize(base64_decode($this->cache->get($key)));
}
public function isCached($key) {
if(!$this->configured) {
$this->readConfiguration();
}
if(!$this->config['ldapCacheTTL']) {
return false;
}
$key = $this->getCacheKey($key);
return $this->cache->hasKey($key);
}
public function writeToCache($key, $value) {
if(!$this->configured) {
$this->readConfiguration();
}
if(!$this->config['ldapCacheTTL']) {
return null;
}
$key = $this->getCacheKey($key);
$value = base64_encode(serialize($value));
$this->cache->set($key, $value, $this->config['ldapCacheTTL']);
}
public function clearCache() {
$this->cache->clear($this->getCacheKey(null));
}
/**
* Caches the general LDAP configuration.
*/
private function readConfiguration($force = false) {
\OCP\Util::writeLog('user_ldap','Checking conf state: isConfigured? '.print_r($this->configured, true).' isForce? '.print_r($force, true).' configID? '.print_r($this->configID, true), \OCP\Util::DEBUG);
if((!$this->configured || $force) && !is_null($this->configID)) {
\OCP\Util::writeLog('user_ldap','Reading the configuration', \OCP\Util::DEBUG);
$this->config['ldapHost'] = \OCP\Config::getAppValue($this->configID, 'ldap_host', '');
$this->config['ldapPort'] = \OCP\Config::getAppValue($this->configID, 'ldap_port', 389);
$this->config['ldapAgentName'] = \OCP\Config::getAppValue($this->configID, 'ldap_dn','');
$this->config['ldapAgentPassword'] = base64_decode(\OCP\Config::getAppValue($this->configID, 'ldap_agent_password',''));
$this->config['ldapBase'] = \OCP\Config::getAppValue($this->configID, 'ldap_base', '');
$this->config['ldapBaseUsers'] = \OCP\Config::getAppValue($this->configID, 'ldap_base_users',$this->config['ldapBase']);
$this->config['ldapBaseGroups'] = \OCP\Config::getAppValue($this->configID, 'ldap_base_groups', $this->config['ldapBase']);
$this->config['ldapTLS'] = \OCP\Config::getAppValue($this->configID, 'ldap_tls',0);
$this->config['ldapNoCase'] = \OCP\Config::getAppValue($this->configID, 'ldap_nocase', 0);
$this->config['turnOffCertCheck'] = \OCP\Config::getAppValue($this->configID, 'ldap_turn_off_cert_check', 0);
$this->config['ldapUserDisplayName'] = mb_strtolower(\OCP\Config::getAppValue($this->configID, 'ldap_display_name', 'uid'), 'UTF-8');
$this->config['ldapUserFilter'] = \OCP\Config::getAppValue($this->configID, 'ldap_userlist_filter','objectClass=person');
$this->config['ldapGroupFilter'] = \OCP\Config::getAppValue($this->configID, 'ldap_group_filter','(objectClass=posixGroup)');
$this->config['ldapLoginFilter'] = \OCP\Config::getAppValue($this->configID, 'ldap_login_filter', '(uid=%uid)');
$this->config['ldapGroupDisplayName'] = mb_strtolower(\OCP\Config::getAppValue($this->configID, 'ldap_group_display_name', 'uid'), 'UTF-8');
$this->config['ldapQuotaAttribute'] = \OCP\Config::getAppValue($this->configID, 'ldap_quota_attr', '');
$this->config['ldapQuotaDefault'] = \OCP\Config::getAppValue($this->configID, 'ldap_quota_def', '');
$this->config['ldapEmailAttribute'] = \OCP\Config::getAppValue($this->configID, 'ldap_email_attr', '');
$this->config['ldapGroupMemberAssocAttr'] = \OCP\Config::getAppValue($this->configID, 'ldap_group_member_assoc_attribute', 'uniqueMember');
$this->config['ldapIgnoreNamingRules'] = \OCP\Config::getSystemValue('ldapIgnoreNamingRules', false);
$this->config['ldapCacheTTL'] = \OCP\Config::getAppValue($this->configID, 'ldap_cache_ttl', 10*60);
$this->config['ldapUuidAttribute'] = \OCP\Config::getAppValue($this->configID, 'ldap_uuid_attribute', 'auto');
$this->config['ldapOverrideUuidAttribute'] = \OCP\Config::getAppValue($this->configID, 'ldap_override_uuid_attribute', 0);
$this->config['homeFolderNamingRule'] = \OCP\Config::getAppValue($this->configID, 'home_folder_naming_rule', 'opt:username');
$this->configured = $this->validateConfiguration();
}
}
/**
* @brief set LDAP configuration with values delivered by an array, not read from configuration
* @param $config array that holds the config parameters in an associated array
* @param &$setParameters optional; array where the set fields will be given to
* @return true if config validates, false otherwise. Check with $setParameters for detailed success on single parameters
*/
public function setConfiguration($config, &$setParameters = null) {
if(!is_array($config)) {
return false;
}
$params = array('ldap_host'=>'ldapHost', 'ldap_port'=>'ldapPort', 'ldap_dn'=>'ldapAgentName', 'ldap_agent_password'=>'ldapAgentPassword', 'ldap_base'=>'ldapBase', 'ldap_base_users'=>'ldapBaseUsers', 'ldap_base_groups'=>'ldapBaseGroups', 'ldap_userlist_filter'=>'ldapUserFilter', 'ldap_login_filter'=>'ldapLoginFilter', 'ldap_group_filter'=>'ldapGroupFilter', 'ldap_display_name'=>'ldapUserDisplayName', 'ldap_group_display_name'=>'ldapGroupDisplayName',
'ldap_tls'=>'ldapTLS', 'ldap_nocase'=>'ldapNoCase', 'ldap_quota_def'=>'ldapQuotaDefault', 'ldap_quota_attr'=>'ldapQuotaAttribute', 'ldap_email_attr'=>'ldapEmailAttribute', 'ldap_group_member_assoc_attribute'=>'ldapGroupMemberAssocAttr', 'ldap_cache_ttl'=>'ldapCacheTTL', 'home_folder_naming_rule' => 'homeFolderNamingRule');
foreach($config as $parameter => $value) {
if(isset($this->config[$parameter])) {
$this->config[$parameter] = $value;
if(is_array($setParameters)) {
$setParameters[] = $parameter;
}
} else if(isset($params[$parameter])) {
$this->config[$params[$parameter]] = $value;
if(is_array($setParameters)) {
$setParameters[] = $params[$parameter];
}
}
}
$this->configured = $this->validateConfiguration();
return $this->configured;
}
/**
* @brief Validates the user specified configuration
* @returns true if configuration seems OK, false otherwise
*/
private function validateConfiguration() {
//first step: "soft" checks: settings that are not really necessary, but advisable. If left empty, give an info message
if(empty($this->config['ldapBaseUsers'])) {
\OCP\Util::writeLog('user_ldap', 'Base tree for Users is empty, using Base DN', \OCP\Util::INFO);
$this->config['ldapBaseUsers'] = $this->config['ldapBase'];
}
if(empty($this->config['ldapBaseGroups'])) {
\OCP\Util::writeLog('user_ldap', 'Base tree for Groups is empty, using Base DN', \OCP\Util::INFO);
$this->config['ldapBaseGroups'] = $this->config['ldapBase'];
}
if(empty($this->config['ldapGroupFilter']) && empty($this->config['ldapGroupMemberAssocAttr'])) {
\OCP\Util::writeLog('user_ldap', 'No group filter is specified, LDAP group feature will not be used.', \OCP\Util::INFO);
}
if(!in_array($this->config['ldapUuidAttribute'], array('auto','entryuuid', 'nsuniqueid', 'objectguid')) && (!is_null($this->configID))) {
\OCP\Config::setAppValue($this->configID, 'ldap_uuid_attribute', 'auto');
\OCP\Util::writeLog('user_ldap', 'Illegal value for the UUID Attribute, reset to autodetect.', \OCP\Util::INFO);
}
//second step: critical checks. If left empty or filled wrong, set as unconfigured and give a warning.
$configurationOK = true;
if(empty($this->config['ldapHost'])) {
\OCP\Util::writeLog('user_ldap', 'No LDAP host given, won`t connect.', \OCP\Util::WARN);
$configurationOK = false;
}
if(empty($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;
}
return $configurationOK;
}
/**
* Connects and Binds to LDAP
*/
private function establishConnection() {
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);
}
}
$this->ldapConnectionRes = ldap_connect($this->config['ldapHost'], $this->config['ldapPort']);
if(ldap_set_option($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);
}
}
}
return $this->bind();
}
}
/**
* Binds to LDAP
*/
public function bind() {
$ldapLogin = @ldap_bind($this->getConnectionResource(), $this->config['ldapAgentName'], $this->config['ldapAgentPassword']);
if(!$ldapLogin) {
\OCP\Util::writeLog('user_ldap', 'Bind failed: ' . ldap_errno($this->ldapConnectionRes) . ': ' . ldap_error($this->ldapConnectionRes), \OCP\Util::ERROR);
$this->ldapConnectionRes = null;
return false;
}
return true;
}
}
|
