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Your IP : 3.141.31.100
<?php
/**
* @copyright Copyright (c) 2016, ownCloud, Inc.
*
* @author Alexander Bergolth <leo@strike.wu.ac.at>
* @author Arthur Schiwon <blizzz@arthur-schiwon.de>
* @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 Robin McCorkell <robin@mccorkell.me.uk>
* @author Roger Szabo <roger.szabo@web.de>
*
* @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 OC\ServerNotAvailableException;
use OCA\User_LDAP\Exceptions\ConstraintViolationException;
class LDAP implements ILDAPWrapper {
protected $curFunc = '';
protected $curArgs = array();
/**
* @param resource $link
* @param string $dn
* @param string $password
* @return bool|mixed
*/
public function bind($link, $dn, $password) {
return $this->invokeLDAPMethod('bind', $link, $dn, $password);
}
/**
* @param string $host
* @param string $port
* @return mixed
*/
public function connect($host, $port) {
if(strpos($host, '://') === false) {
$host = 'ldap://' . $host;
}
if(strpos($host, ':', strpos($host, '://') + 1) === false) {
//ldap_connect ignores port parameter when URLs are passed
$host .= ':' . $port;
}
return $this->invokeLDAPMethod('connect', $host);
}
/**
* @param resource $link
* @param resource $result
* @param string $cookie
* @return bool|LDAP
*/
public function controlPagedResultResponse($link, $result, &$cookie) {
$this->preFunctionCall('ldap_control_paged_result_response',
array($link, $result, $cookie));
$result = ldap_control_paged_result_response($link, $result, $cookie);
$this->postFunctionCall();
return $result;
}
/**
* @param LDAP $link
* @param int $pageSize
* @param bool $isCritical
* @param string $cookie
* @return mixed|true
*/
public function controlPagedResult($link, $pageSize, $isCritical, $cookie) {
return $this->invokeLDAPMethod('control_paged_result', $link, $pageSize,
$isCritical, $cookie);
}
/**
* @param LDAP $link
* @param LDAP $result
* @return mixed
*/
public function countEntries($link, $result) {
return $this->invokeLDAPMethod('count_entries', $link, $result);
}
/**
* @param LDAP $link
* @return integer
*/
public function errno($link) {
return $this->invokeLDAPMethod('errno', $link);
}
/**
* @param LDAP $link
* @return string
*/
public function error($link) {
return $this->invokeLDAPMethod('error', $link);
}
/**
* Splits DN into its component parts
* @param string $dn
* @param int @withAttrib
* @return array|false
* @link http://www.php.net/manual/en/function.ldap-explode-dn.php
*/
public function explodeDN($dn, $withAttrib) {
return $this->invokeLDAPMethod('explode_dn', $dn, $withAttrib);
}
/**
* @param LDAP $link
* @param LDAP $result
* @return mixed
*/
public function firstEntry($link, $result) {
return $this->invokeLDAPMethod('first_entry', $link, $result);
}
/**
* @param LDAP $link
* @param LDAP $result
* @return array|mixed
*/
public function getAttributes($link, $result) {
return $this->invokeLDAPMethod('get_attributes', $link, $result);
}
/**
* @param LDAP $link
* @param LDAP $result
* @return mixed|string
*/
public function getDN($link, $result) {
return $this->invokeLDAPMethod('get_dn', $link, $result);
}
/**
* @param LDAP $link
* @param LDAP $result
* @return array|mixed
*/
public function getEntries($link, $result) {
return $this->invokeLDAPMethod('get_entries', $link, $result);
}
/**
* @param LDAP $link
* @param resource $result
* @return mixed
*/
public function nextEntry($link, $result) {
return $this->invokeLDAPMethod('next_entry', $link, $result);
}
/**
* @param LDAP $link
* @param string $baseDN
* @param string $filter
* @param array $attr
* @return mixed
*/
public function read($link, $baseDN, $filter, $attr) {
return $this->invokeLDAPMethod('read', $link, $baseDN, $filter, $attr);
}
/**
* @param LDAP $link
* @param string $baseDN
* @param string $filter
* @param array $attr
* @param int $attrsOnly
* @param int $limit
* @return mixed
*/
public function search($link, $baseDN, $filter, $attr, $attrsOnly = 0, $limit = 0) {
return $this->invokeLDAPMethod('search', $link, $baseDN, $filter, $attr, $attrsOnly, $limit);
}
/**
* @param LDAP $link
* @param string $userDN
* @param string $password
* @return bool
*/
public function modReplace($link, $userDN, $password) {
return $this->invokeLDAPMethod('mod_replace', $link, $userDN, array('userPassword' => $password));
}
/**
* @param LDAP $link
* @param string $option
* @param int $value
* @return bool|mixed
*/
public function setOption($link, $option, $value) {
return $this->invokeLDAPMethod('set_option', $link, $option, $value);
}
/**
* @param LDAP $link
* @return mixed|true
*/
public function startTls($link) {
return $this->invokeLDAPMethod('start_tls', $link);
}
/**
* @param resource $link
* @return bool|mixed
*/
public function unbind($link) {
return $this->invokeLDAPMethod('unbind', $link);
}
/**
* Checks whether the server supports LDAP
* @return boolean if it the case, false otherwise
* */
public function areLDAPFunctionsAvailable() {
return function_exists('ldap_connect');
}
/**
* Checks whether PHP supports LDAP Paged Results
* @return boolean if it the case, false otherwise
* */
public function hasPagedResultSupport() {
$hasSupport = function_exists('ldap_control_paged_result')
&& function_exists('ldap_control_paged_result_response');
return $hasSupport;
}
/**
* Checks whether the submitted parameter is a resource
* @param Resource $resource the resource variable to check
* @return bool true if it is a resource, false otherwise
*/
public function isResource($resource) {
return is_resource($resource);
}
/**
* Checks whether the return value from LDAP is wrong or not.
*
* When using ldap_search we provide an array, in case multiple bases are
* configured. Thus, we need to check the array elements.
*
* @param $result
* @return bool
*/
protected function isResultFalse($result) {
if($result === false) {
return true;
}
if($this->curFunc === 'ldap_search' && is_array($result)) {
foreach ($result as $singleResult) {
if($singleResult === false) {
return true;
}
}
}
return false;
}
/**
* @return mixed
*/
protected function invokeLDAPMethod() {
$arguments = func_get_args();
$func = 'ldap_' . array_shift($arguments);
if(function_exists($func)) {
$this->preFunctionCall($func, $arguments);
$result = call_user_func_array($func, $arguments);
if ($this->isResultFalse($result)) {
$this->postFunctionCall();
}
return $result;
}
return null;
}
/**
* @param string $functionName
* @param array $args
*/
private function preFunctionCall($functionName, $args) {
$this->curFunc = $functionName;
$this->curArgs = $args;
}
/**
* Analyzes the returned LDAP error and acts accordingly if not 0
*
* @param resource $resource the LDAP Connection resource
* @throws ConstraintViolationException
* @throws ServerNotAvailableException
* @throws \Exception
*/
private function processLDAPError($resource) {
$errorCode = ldap_errno($resource);
if($errorCode === 0) {
return;
}
$errorMsg = ldap_error($resource);
if($this->curFunc === 'ldap_get_entries'
&& $errorCode === -4) {
} else if ($errorCode === 32) {
//for now
} else if ($errorCode === 10) {
//referrals, we switch them off, but then there is AD :)
} else if ($errorCode === -1) {
throw new ServerNotAvailableException('Lost connection to LDAP server.');
} else if ($errorCode === 52) {
throw new ServerNotAvailableException('LDAP server is shutting down.');
} else if ($errorCode === 48) {
throw new \Exception('LDAP authentication method rejected', $errorCode);
} else if ($errorCode === 1) {
throw new \Exception('LDAP Operations error', $errorCode);
} else if ($errorCode === 19) {
ldap_get_option($this->curArgs[0], LDAP_OPT_ERROR_STRING, $extended_error);
throw new ConstraintViolationException(!empty($extended_error)?$extended_error:$errorMsg, $errorCode);
} else {
\OC::$server->getLogger()->debug('LDAP error {message} ({code}) after calling {func}', [
'app' => 'user_ldap',
'message' => $errorMsg,
'code' => $errorCode,
'func' => $this->curFunc,
]);
}
}
/**
* Called after an ldap method is run to act on LDAP error if necessary
*/
private function postFunctionCall() {
if($this->isResource($this->curArgs[0])) {
$resource = $this->curArgs[0];
} else if(
$this->curFunc === 'ldap_search'
&& is_array($this->curArgs[0])
&& $this->isResource($this->curArgs[0][0])
) {
// we use always the same LDAP connection resource, is enough to
// take the first one.
$resource = $this->curArgs[0][0];
} else {
return;
}
$this->processLDAPError($resource);
$this->curFunc = '';
$this->curArgs = [];
}
}