1108 lines
35 KiB
PHP
1108 lines
35 KiB
PHP
<?php
|
||
|
||
/**
|
||
* ownCloud – LDAP Access
|
||
*
|
||
* @author Arthur Schiwon
|
||
* @copyright 2012, 2013 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;
|
||
|
||
abstract class Access {
|
||
protected $connection;
|
||
//never ever check this var directly, always use getPagedSearchResultState
|
||
protected $pagedSearchedSuccessful;
|
||
|
||
public function setConnector(Connection &$connection) {
|
||
$this->connection = $connection;
|
||
}
|
||
|
||
private function checkConnection() {
|
||
return ($this->connection instanceof Connection);
|
||
}
|
||
|
||
/**
|
||
* @brief reads a given attribute for an LDAP record identified by a DN
|
||
* @param $dn the record in question
|
||
* @param $attr the attribute that shall be retrieved
|
||
* if empty, just check the record's existence
|
||
* @returns an array of values on success or an empty
|
||
* array if $attr is empty, false otherwise
|
||
*
|
||
* Reads an attribute from an LDAP entry or check if entry exists
|
||
*/
|
||
public function readAttribute($dn, $attr, $filter = 'objectClass=*') {
|
||
if(!$this->checkConnection()) {
|
||
\OCP\Util::writeLog('user_ldap',
|
||
'No LDAP Connector assigned, access impossible for readAttribute.',
|
||
\OCP\Util::WARN);
|
||
return false;
|
||
}
|
||
$cr = $this->connection->getConnectionResource();
|
||
if(!is_resource($cr)) {
|
||
//LDAP not available
|
||
\OCP\Util::writeLog('user_ldap', 'LDAP resource not available.', \OCP\Util::DEBUG);
|
||
return false;
|
||
}
|
||
$dn = $this->DNasBaseParameter($dn);
|
||
$rr = @ldap_read($cr, $dn, $filter, array($attr));
|
||
if(!is_resource($rr)) {
|
||
if(!empty($attr)) {
|
||
//do not throw this message on userExists check, irritates
|
||
\OCP\Util::writeLog('user_ldap', 'readAttribute failed for DN '.$dn, \OCP\Util::DEBUG);
|
||
}
|
||
//in case an error occurs , e.g. object does not exist
|
||
return false;
|
||
}
|
||
if (empty($attr)) {
|
||
\OCP\Util::writeLog('user_ldap', 'readAttribute: '.$dn.' found', \OCP\Util::DEBUG);
|
||
return array();
|
||
}
|
||
$er = ldap_first_entry($cr, $rr);
|
||
if(!is_resource($er)) {
|
||
//did not match the filter, return false
|
||
return false;
|
||
}
|
||
//LDAP attributes are not case sensitive
|
||
$result = \OCP\Util::mb_array_change_key_case(ldap_get_attributes($cr, $er), MB_CASE_LOWER, 'UTF-8');
|
||
$attr = mb_strtolower($attr, 'UTF-8');
|
||
|
||
if(isset($result[$attr]) && $result[$attr]['count'] > 0) {
|
||
$values = array();
|
||
for($i=0;$i<$result[$attr]['count'];$i++) {
|
||
if($this->resemblesDN($attr)) {
|
||
$values[] = $this->sanitizeDN($result[$attr][$i]);
|
||
} elseif(strtolower($attr) == 'objectguid' || strtolower($attr) == 'guid') {
|
||
$values[] = $this->convertObjectGUID2Str($result[$attr][$i]);
|
||
} else {
|
||
$values[] = $result[$attr][$i];
|
||
}
|
||
}
|
||
return $values;
|
||
}
|
||
\OCP\Util::writeLog('user_ldap', 'Requested attribute '.$attr.' not found for '.$dn, \OCP\Util::DEBUG);
|
||
return false;
|
||
}
|
||
|
||
/**
|
||
* @brief checks wether the given attribute`s valua is probably a DN
|
||
* @param $attr the attribute in question
|
||
* @return if so true, otherwise false
|
||
*/
|
||
private function resemblesDN($attr) {
|
||
$resemblingAttributes = array(
|
||
'dn',
|
||
'uniquemember',
|
||
'member'
|
||
);
|
||
return in_array($attr, $resemblingAttributes);
|
||
}
|
||
|
||
/**
|
||
* @brief sanitizes a DN received from the LDAP server
|
||
* @param $dn the DN in question
|
||
* @return the sanitized DN
|
||
*/
|
||
private function sanitizeDN($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 $dn;
|
||
}
|
||
|
||
/**
|
||
* gives back the database table for the query
|
||
*/
|
||
private function getMapTable($isUser) {
|
||
if($isUser) {
|
||
return '*PREFIX*ldap_user_mapping';
|
||
} else {
|
||
return '*PREFIX*ldap_group_mapping';
|
||
}
|
||
}
|
||
|
||
/**
|
||
* @brief returns the LDAP DN for the given internal ownCloud name of the group
|
||
* @param $name the ownCloud name in question
|
||
* @returns string with the LDAP DN on success, otherwise false
|
||
*
|
||
* returns the LDAP DN for the given internal ownCloud name of the group
|
||
*/
|
||
public function groupname2dn($name) {
|
||
$dn = $this->ocname2dn($name, false);
|
||
|
||
if($dn) {
|
||
return $dn;
|
||
}
|
||
|
||
return false;
|
||
}
|
||
|
||
/**
|
||
* @brief returns the LDAP DN for the given internal ownCloud name of the user
|
||
* @param $name the ownCloud name in question
|
||
* @returns string with the LDAP DN on success, otherwise false
|
||
*
|
||
* returns the LDAP DN for the given internal ownCloud name of the user
|
||
*/
|
||
public function username2dn($name) {
|
||
$dn = $this->ocname2dn($name, true);
|
||
if($dn) {
|
||
return $dn;
|
||
}
|
||
|
||
return false;
|
||
}
|
||
|
||
/**
|
||
* @brief returns the LDAP DN for the given internal ownCloud name
|
||
* @param $name the ownCloud name in question
|
||
* @param $isUser is it a user? otherwise group
|
||
* @returns string with the LDAP DN on success, otherwise false
|
||
*
|
||
* returns the LDAP DN for the given internal ownCloud name
|
||
*/
|
||
private function ocname2dn($name, $isUser) {
|
||
$table = $this->getMapTable($isUser);
|
||
|
||
$query = \OCP\DB::prepare('
|
||
SELECT `ldap_dn`
|
||
FROM `'.$table.'`
|
||
WHERE `owncloud_name` = ?
|
||
');
|
||
|
||
$record = $query->execute(array($name))->fetchOne();
|
||
return $record;
|
||
}
|
||
|
||
/**
|
||
* @brief returns the internal ownCloud name for the given LDAP DN of the group
|
||
* @param $dn the dn of the group object
|
||
* @param $ldapname optional, the display name of the object
|
||
* @returns string with with the name to use in ownCloud, false on DN outside of search DN
|
||
*
|
||
* returns the internal ownCloud name for the given LDAP DN of the
|
||
* group, false on DN outside of search DN or failure
|
||
*/
|
||
public function dn2groupname($dn, $ldapname = null) {
|
||
//To avoid bypassing the base DN settings under certain circumstances
|
||
//with the group support, check whether the provided DN matches one of
|
||
//the given Bases
|
||
if(!$this->isDNPartOfBase($dn, $this->connection->ldapBaseGroups)) {
|
||
return false;
|
||
}
|
||
|
||
return $this->dn2ocname($dn, $ldapname, false);
|
||
}
|
||
|
||
/**
|
||
* @brief returns the internal ownCloud name for the given LDAP DN of the user
|
||
* @param $dn the dn of the user object
|
||
* @param $ldapname optional, the display name of the object
|
||
* @returns string with with the name to use in ownCloud
|
||
*
|
||
* returns the internal ownCloud name for the given LDAP DN of the user, false on DN outside of search DN or failure
|
||
*/
|
||
public function dn2username($dn, $ldapname = null) {
|
||
//To avoid bypassing the base DN settings under certain circumstances
|
||
//with the group support, check whether the provided DN matches one of
|
||
//the given Bases
|
||
if(!$this->isDNPartOfBase($dn, $this->connection->ldapBaseUsers)) {
|
||
return false;
|
||
}
|
||
|
||
return $this->dn2ocname($dn, $ldapname, true);
|
||
}
|
||
|
||
/**
|
||
* @brief returns an internal ownCloud name for the given LDAP DN
|
||
* @param $dn the dn of the user object
|
||
* @param $ldapname optional, the display name of the object
|
||
* @param $isUser optional, wether it is a user object (otherwise group assumed)
|
||
* @returns string with with the name to use in ownCloud
|
||
*
|
||
* returns the internal ownCloud name for the given LDAP DN of the user, false on DN outside of search DN
|
||
*/
|
||
public function dn2ocname($dn, $ldapname = null, $isUser = true) {
|
||
$table = $this->getMapTable($isUser);
|
||
if($isUser) {
|
||
$fncFindMappedName = 'findMappedUser';
|
||
$nameAttribute = $this->connection->ldapUserDisplayName;
|
||
} else {
|
||
$fncFindMappedName = 'findMappedGroup';
|
||
$nameAttribute = $this->connection->ldapGroupDisplayName;
|
||
}
|
||
|
||
//let's try to retrieve the ownCloud name from the mappings table
|
||
$ocname = $this->$fncFindMappedName($dn);
|
||
if($ocname) {
|
||
return $ocname;
|
||
}
|
||
|
||
//second try: get the UUID and check if it is known. Then, update the DN and return the name.
|
||
$uuid = $this->getUUID($dn);
|
||
if($uuid) {
|
||
$query = \OCP\DB::prepare('
|
||
SELECT `owncloud_name`
|
||
FROM `'.$table.'`
|
||
WHERE `directory_uuid` = ?
|
||
');
|
||
$component = $query->execute(array($uuid))->fetchOne();
|
||
if($component) {
|
||
$query = \OCP\DB::prepare('
|
||
UPDATE `'.$table.'`
|
||
SET `ldap_dn` = ?
|
||
WHERE `directory_uuid` = ?
|
||
');
|
||
$query->execute(array($dn, $uuid));
|
||
return $component;
|
||
}
|
||
} else {
|
||
//If the UUID can't be detected something is foul.
|
||
\OCP\Util::writeLog('user_ldap', 'Cannot determine UUID for '.$dn.'. Skipping.', \OCP\Util::INFO);
|
||
return false;
|
||
}
|
||
|
||
if(is_null($ldapname)) {
|
||
$ldapname = $this->readAttribute($dn, $nameAttribute);
|
||
if(!isset($ldapname[0]) && empty($ldapname[0])) {
|
||
\OCP\Util::writeLog('user_ldap', 'No or empty name for '.$dn.'.', \OCP\Util::INFO);
|
||
return false;
|
||
}
|
||
$ldapname = $ldapname[0];
|
||
}
|
||
$intname = $isUser ? $this->sanitizeUsername($uuid) : $this->sanitizeUsername($ldapname);
|
||
|
||
//a new user/group! Add it only if it doesn't conflict with other backend's users or existing groups
|
||
//disabling Cache is required to avoid that the new user is cached as not-existing in fooExists check
|
||
$originalTTL = $this->connection->ldapCacheTTL;
|
||
$this->connection->setConfiguration(array('ldapCacheTTL' => 0));
|
||
if(($isUser && !\OCP\User::userExists($intname))
|
||
|| (!$isUser && !\OC_Group::groupExists($intname))) {
|
||
if($this->mapComponent($dn, $intname, $isUser)) {
|
||
$this->connection->setConfiguration(array('ldapCacheTTL' => $originalTTL));
|
||
return $intname;
|
||
}
|
||
}
|
||
$this->connection->setConfiguration(array('ldapCacheTTL' => $originalTTL));
|
||
|
||
$altname = $this->createAltInternalOwnCloudName($intname, $isUser);
|
||
if($this->mapComponent($dn, $altname, $isUser)) {
|
||
return $altname;
|
||
}
|
||
|
||
//if everything else did not help..
|
||
\OCP\Util::writeLog('user_ldap', 'Could not create unique ownCloud name for '.$dn.'.', \OCP\Util::INFO);
|
||
return false;
|
||
}
|
||
|
||
/**
|
||
* @brief gives back the user names as they are used ownClod internally
|
||
* @param $ldapGroups an array with the ldap Users result in style of array ( array ('dn' => foo, 'uid' => bar), ... )
|
||
* @returns an array with the user names to use in ownCloud
|
||
*
|
||
* gives back the user names as they are used ownClod internally
|
||
*/
|
||
public function ownCloudUserNames($ldapUsers) {
|
||
return $this->ldap2ownCloudNames($ldapUsers, true);
|
||
}
|
||
|
||
/**
|
||
* @brief gives back the group names as they are used ownClod internally
|
||
* @param $ldapGroups an array with the ldap Groups result in style of array ( array ('dn' => foo, 'cn' => bar), ... )
|
||
* @returns an array with the group names to use in ownCloud
|
||
*
|
||
* gives back the group names as they are used ownClod internally
|
||
*/
|
||
public function ownCloudGroupNames($ldapGroups) {
|
||
return $this->ldap2ownCloudNames($ldapGroups, false);
|
||
}
|
||
|
||
private function findMappedUser($dn) {
|
||
static $query = null;
|
||
if(is_null($query)) {
|
||
$query = \OCP\DB::prepare('
|
||
SELECT `owncloud_name`
|
||
FROM `'.$this->getMapTable(true).'`
|
||
WHERE `ldap_dn` = ?'
|
||
);
|
||
}
|
||
$res = $query->execute(array($dn))->fetchOne();
|
||
if($res) {
|
||
return $res;
|
||
}
|
||
return false;
|
||
}
|
||
|
||
private function findMappedGroup($dn) {
|
||
static $query = null;
|
||
if(is_null($query)) {
|
||
$query = \OCP\DB::prepare('
|
||
SELECT `owncloud_name`
|
||
FROM `'.$this->getMapTable(false).'`
|
||
WHERE `ldap_dn` = ?'
|
||
);
|
||
}
|
||
$res = $query->execute(array($dn))->fetchOne();
|
||
if($res) {
|
||
return $res;
|
||
}
|
||
return false;
|
||
}
|
||
|
||
|
||
private function ldap2ownCloudNames($ldapObjects, $isUsers) {
|
||
if($isUsers) {
|
||
$nameAttribute = $this->connection->ldapUserDisplayName;
|
||
} else {
|
||
$nameAttribute = $this->connection->ldapGroupDisplayName;
|
||
}
|
||
$ownCloudNames = array();
|
||
|
||
foreach($ldapObjects as $ldapObject) {
|
||
$nameByLDAP = isset($ldapObject[$nameAttribute]) ? $ldapObject[$nameAttribute] : null;
|
||
$ocname = $this->dn2ocname($ldapObject['dn'], $nameByLDAP, $isUsers);
|
||
if($ocname) {
|
||
$ownCloudNames[] = $ocname;
|
||
}
|
||
continue;
|
||
}
|
||
return $ownCloudNames;
|
||
}
|
||
|
||
/**
|
||
* @brief creates a unique name for internal ownCloud use for users. Don't call it directly.
|
||
* @param $name the display name of the object
|
||
* @returns string with with the name to use in ownCloud or false if unsuccessful
|
||
*
|
||
* Instead of using this method directly, call
|
||
* createAltInternalOwnCloudName($name, true)
|
||
*/
|
||
private function _createAltInternalOwnCloudNameForUsers($name) {
|
||
$attempts = 0;
|
||
//while loop is just a precaution. If a name is not generated within
|
||
//20 attempts, something else is very wrong. Avoids infinite loop.
|
||
while($attempts < 20){
|
||
$altName = $name . '_' . uniqid();
|
||
if(\OCP\User::userExists($altName)) {
|
||
return $altName;
|
||
}
|
||
$attempts++;
|
||
}
|
||
return false;
|
||
}
|
||
|
||
/**
|
||
* @brief creates a unique name for internal ownCloud use for groups. Don't call it directly.
|
||
* @param $name the display name of the object
|
||
* @returns string with with the name to use in ownCloud or false if unsuccessful.
|
||
*
|
||
* Instead of using this method directly, call
|
||
* createAltInternalOwnCloudName($name, false)
|
||
*
|
||
* Group names are also used as display names, so we do a sequential
|
||
* numbering, e.g. Developers_42 when there are 41 other groups called
|
||
* "Developers"
|
||
*/
|
||
private function _createAltInternalOwnCloudNameForGroups($name) {
|
||
$query = \OCP\DB::prepare('
|
||
SELECT `owncloud_name`
|
||
FROM `'.$this->getMapTable(false).'`
|
||
WHERE `owncloud_name` LIKE ?
|
||
');
|
||
|
||
$usedNames = array();
|
||
$res = $query->execute(array($name.'_%'));
|
||
while($row = $res->fetchRow()) {
|
||
$usedNames[] = $row['owncloud_name'];
|
||
}
|
||
if(!($usedNames) || count($usedNames) == 0) {
|
||
$lastNo = 1; //will become name_2
|
||
} else {
|
||
natsort($usedNames);
|
||
$lastname = array_pop($usedNames);
|
||
$lastNo = intval(substr($lastname, strrpos($lastname, '_') + 1));
|
||
}
|
||
$altName = $name.'_'.strval($lastNo+1);
|
||
unset($usedNames);
|
||
|
||
$attempts = 1;
|
||
while($attempts < 21){
|
||
//Pro forma check to be really sure it is unique
|
||
//while loop is just a precaution. If a name is not generated within
|
||
//20 attempts, something else is very wrong. Avoids infinite loop.
|
||
if(!\OC_Group::groupExists($altName)) {
|
||
return $altName;
|
||
}
|
||
$altName = $name . '_' . $lastNo + $attempts;
|
||
$attempts++;
|
||
}
|
||
return false;
|
||
}
|
||
|
||
/**
|
||
* @brief creates a unique name for internal ownCloud use.
|
||
* @param $name the display name of the object
|
||
* @param $isUser boolean, whether name should be created for a user (true) or a group (false)
|
||
* @returns string with with the name to use in ownCloud or false if unsuccessful
|
||
*/
|
||
private function createAltInternalOwnCloudName($name, $isUser) {
|
||
$originalTTL = $this->connection->ldapCacheTTL;
|
||
$this->connection->setConfiguration(array('ldapCacheTTL' => 0));
|
||
if($isUser) {
|
||
$altName = $this->_createAltInternalOwnCloudNameForUsers($name);
|
||
} else {
|
||
$altName = $this->_createAltInternalOwnCloudNameForGroups($name);
|
||
}
|
||
$this->connection->setConfiguration(array('ldapCacheTTL' => $originalTTL));
|
||
|
||
return $altName;
|
||
}
|
||
|
||
/**
|
||
* @brief retrieves all known groups from the mappings table
|
||
* @returns array with the results
|
||
*
|
||
* retrieves all known groups from the mappings table
|
||
*/
|
||
private function mappedGroups() {
|
||
return $this->mappedComponents(false);
|
||
}
|
||
|
||
/**
|
||
* @brief retrieves all known users from the mappings table
|
||
* @returns array with the results
|
||
*
|
||
* retrieves all known users from the mappings table
|
||
*/
|
||
private function mappedUsers() {
|
||
return $this->mappedComponents(true);
|
||
}
|
||
|
||
private function mappedComponents($isUsers) {
|
||
$table = $this->getMapTable($isUsers);
|
||
|
||
$query = \OCP\DB::prepare('
|
||
SELECT `ldap_dn`, `owncloud_name`
|
||
FROM `'. $table . '`'
|
||
);
|
||
|
||
return $query->execute()->fetchAll();
|
||
}
|
||
|
||
/**
|
||
* @brief inserts a new user or group into the mappings table
|
||
* @param $dn the record in question
|
||
* @param $ocname the name to use in ownCloud
|
||
* @param $isUser is it a user or a group?
|
||
* @returns true on success, false otherwise
|
||
*
|
||
* inserts a new user or group into the mappings table
|
||
*/
|
||
private function mapComponent($dn, $ocname, $isUser = true) {
|
||
$table = $this->getMapTable($isUser);
|
||
|
||
$sqlAdjustment = '';
|
||
$dbtype = \OCP\Config::getSystemValue('dbtype');
|
||
if($dbtype == 'mysql') {
|
||
$sqlAdjustment = 'FROM DUAL';
|
||
}
|
||
|
||
$insert = \OCP\DB::prepare('
|
||
INSERT INTO `'.$table.'` (`ldap_dn`, `owncloud_name`, `directory_uuid`)
|
||
SELECT ?,?,?
|
||
'.$sqlAdjustment.'
|
||
WHERE NOT EXISTS (
|
||
SELECT 1
|
||
FROM `'.$table.'`
|
||
WHERE `ldap_dn` = ?
|
||
OR `owncloud_name` = ?)
|
||
');
|
||
|
||
//feed the DB
|
||
$res = $insert->execute(array($dn, $ocname, $this->getUUID($dn), $dn, $ocname));
|
||
|
||
if(\OCP\DB::isError($res)) {
|
||
return false;
|
||
}
|
||
|
||
$insRows = $res->numRows();
|
||
|
||
if($insRows == 0) {
|
||
return false;
|
||
}
|
||
|
||
return true;
|
||
}
|
||
|
||
public function fetchListOfUsers($filter, $attr, $limit = null, $offset = null) {
|
||
return $this->fetchList($this->searchUsers($filter, $attr, $limit, $offset), (count($attr) > 1));
|
||
}
|
||
|
||
public function fetchListOfGroups($filter, $attr, $limit = null, $offset = null) {
|
||
return $this->fetchList($this->searchGroups($filter, $attr, $limit, $offset), (count($attr) > 1));
|
||
}
|
||
|
||
private function fetchList($list, $manyAttributes) {
|
||
if(is_array($list)) {
|
||
if($manyAttributes) {
|
||
return $list;
|
||
} else {
|
||
return array_unique($list, SORT_LOCALE_STRING);
|
||
}
|
||
}
|
||
|
||
//error cause actually, maybe throw an exception in future.
|
||
return array();
|
||
}
|
||
|
||
/**
|
||
* @brief executes an LDAP search, optimized for Users
|
||
* @param $filter the LDAP filter for the search
|
||
* @param $attr optional, when a certain attribute shall be filtered out
|
||
* @returns array with the search result
|
||
*
|
||
* Executes an LDAP search
|
||
*/
|
||
public function searchUsers($filter, $attr = null, $limit = null, $offset = null) {
|
||
return $this->search($filter, $this->connection->ldapBaseUsers, $attr, $limit, $offset);
|
||
}
|
||
|
||
/**
|
||
* @brief executes an LDAP search, optimized for Groups
|
||
* @param $filter the LDAP filter for the search
|
||
* @param $attr optional, when a certain attribute shall be filtered out
|
||
* @returns array with the search result
|
||
*
|
||
* Executes an LDAP search
|
||
*/
|
||
public function searchGroups($filter, $attr = null, $limit = null, $offset = null) {
|
||
return $this->search($filter, $this->connection->ldapBaseGroups, $attr, $limit, $offset);
|
||
}
|
||
|
||
/**
|
||
* @brief executes an LDAP search
|
||
* @param $filter the LDAP filter for the search
|
||
* @param $base an array containing the LDAP subtree(s) that shall be searched
|
||
* @param $attr optional, array, one or more attributes that shall be
|
||
* retrieved. Results will according to the order in the array.
|
||
* @returns array with the search result
|
||
*
|
||
* Executes an LDAP search
|
||
*/
|
||
private function search($filter, $base, $attr = null, $limit = null, $offset = null, $skipHandling = false) {
|
||
if(!is_null($attr) && !is_array($attr)) {
|
||
$attr = array(mb_strtolower($attr, 'UTF-8'));
|
||
}
|
||
|
||
// See if we have a resource, in case not cancel with message
|
||
$link_resource = $this->connection->getConnectionResource();
|
||
if(!is_resource($link_resource)) {
|
||
// Seems like we didn't find any resource.
|
||
// Return an empty array just like before.
|
||
\OCP\Util::writeLog('user_ldap', 'Could not search, because resource is missing.', \OCP\Util::DEBUG);
|
||
return array();
|
||
}
|
||
|
||
//check wether paged search should be attempted
|
||
$pagedSearchOK = $this->initPagedSearch($filter, $base, $attr, $limit, $offset);
|
||
|
||
$linkResources = array_pad(array(), count($base), $link_resource);
|
||
$sr = ldap_search($linkResources, $base, $filter, $attr);
|
||
$error = ldap_errno($link_resource);
|
||
if(!is_array($sr) || $error != 0) {
|
||
\OCP\Util::writeLog('user_ldap',
|
||
'Error when searching: '.ldap_error($link_resource).' code '.ldap_errno($link_resource),
|
||
\OCP\Util::ERROR);
|
||
\OCP\Util::writeLog('user_ldap', 'Attempt for Paging? '.print_r($pagedSearchOK, true), \OCP\Util::ERROR);
|
||
return array();
|
||
}
|
||
|
||
// Do the server-side sorting
|
||
foreach(array_reverse($attr) as $sortAttr){
|
||
foreach($sr as $searchResource) {
|
||
ldap_sort($link_resource, $searchResource, $sortAttr);
|
||
}
|
||
}
|
||
|
||
$findings = array();
|
||
foreach($sr as $key => $res) {
|
||
$findings = array_merge($findings, ldap_get_entries($link_resource, $res ));
|
||
}
|
||
if($pagedSearchOK) {
|
||
\OCP\Util::writeLog('user_ldap', 'Paged search successful', \OCP\Util::INFO);
|
||
foreach($sr as $key => $res) {
|
||
$cookie = null;
|
||
if(ldap_control_paged_result_response($link_resource, $res, $cookie)) {
|
||
\OCP\Util::writeLog('user_ldap', 'Set paged search cookie', \OCP\Util::INFO);
|
||
$this->setPagedResultCookie($base[$key], $filter, $limit, $offset, $cookie);
|
||
}
|
||
}
|
||
|
||
//browsing through prior pages to get the cookie for the new one
|
||
if($skipHandling) {
|
||
return;
|
||
}
|
||
// if count is bigger, then the server does not support
|
||
// paged search. Instead, he did a normal search. We set a
|
||
// flag here, so the callee knows how to deal with it.
|
||
if($findings['count'] <= $limit) {
|
||
$this->pagedSearchedSuccessful = true;
|
||
}
|
||
} else {
|
||
if(!is_null($limit)) {
|
||
\OCP\Util::writeLog('user_ldap', 'Paged search failed :(', \OCP\Util::INFO);
|
||
}
|
||
}
|
||
|
||
// if we're here, probably no connection resource is returned.
|
||
// to make ownCloud behave nicely, we simply give back an empty array.
|
||
if(is_null($findings)) {
|
||
return array();
|
||
}
|
||
|
||
if(!is_null($attr)) {
|
||
$selection = array();
|
||
$multiarray = false;
|
||
if(count($attr) > 1) {
|
||
$multiarray = true;
|
||
$i = 0;
|
||
}
|
||
foreach($findings as $item) {
|
||
if(!is_array($item)) {
|
||
continue;
|
||
}
|
||
$item = \OCP\Util::mb_array_change_key_case($item, MB_CASE_LOWER, 'UTF-8');
|
||
|
||
if($multiarray) {
|
||
foreach($attr as $key) {
|
||
$key = mb_strtolower($key, 'UTF-8');
|
||
if(isset($item[$key])) {
|
||
if($key != 'dn') {
|
||
$selection[$i][$key] = $this->resemblesDN($key) ?
|
||
$this->sanitizeDN($item[$key][0])
|
||
: $item[$key][0];
|
||
} else {
|
||
$selection[$i][$key] = $this->sanitizeDN($item[$key]);
|
||
}
|
||
}
|
||
|
||
}
|
||
$i++;
|
||
} else {
|
||
//tribute to case insensitivity
|
||
$key = mb_strtolower($attr[0], 'UTF-8');
|
||
|
||
if(isset($item[$key])) {
|
||
if($this->resemblesDN($key)) {
|
||
$selection[] = $this->sanitizeDN($item[$key]);
|
||
} else {
|
||
$selection[] = $item[$key];
|
||
}
|
||
}
|
||
}
|
||
}
|
||
$findings = $selection;
|
||
}
|
||
//we slice the findings, when
|
||
//a) paged search insuccessful, though attempted
|
||
//b) no paged search, but limit set
|
||
if((!$this->pagedSearchedSuccessful
|
||
&& $pagedSearchOK)
|
||
|| (
|
||
!$pagedSearchOK
|
||
&& !is_null($limit)
|
||
)
|
||
) {
|
||
$findings = array_slice($findings, intval($offset), $limit);
|
||
}
|
||
return $findings;
|
||
}
|
||
|
||
public function sanitizeUsername($name) {
|
||
if($this->connection->ldapIgnoreNamingRules) {
|
||
return $name;
|
||
}
|
||
|
||
// Translitaration
|
||
//latin characters to ASCII
|
||
$name = iconv('UTF-8', 'ASCII//TRANSLIT', $name);
|
||
|
||
//REPLACEMENTS
|
||
$name = \OCP\Util::mb_str_replace(' ', '_', $name, 'UTF-8');
|
||
|
||
//every remaining unallowed characters will be removed
|
||
$name = preg_replace('/[^a-zA-Z0-9_.@-]/u', '', $name);
|
||
|
||
return $name;
|
||
}
|
||
|
||
/**
|
||
* @brief combines the input filters with AND
|
||
* @param $filters array, the filters to connect
|
||
* @returns the combined filter
|
||
*
|
||
* Combines Filter arguments with AND
|
||
*/
|
||
public function combineFilterWithAnd($filters) {
|
||
return $this->combineFilter($filters, '&');
|
||
}
|
||
|
||
/**
|
||
* @brief combines the input filters with AND
|
||
* @param $filters array, the filters to connect
|
||
* @returns the combined filter
|
||
*
|
||
* Combines Filter arguments with AND
|
||
*/
|
||
public function combineFilterWithOr($filters) {
|
||
return $this->combineFilter($filters, '|');
|
||
}
|
||
|
||
/**
|
||
* @brief combines the input filters with given operator
|
||
* @param $filters array, the filters to connect
|
||
* @param $operator either & or |
|
||
* @returns the combined filter
|
||
*
|
||
* Combines Filter arguments with AND
|
||
*/
|
||
private function combineFilter($filters, $operator) {
|
||
$combinedFilter = '('.$operator;
|
||
foreach($filters as $filter) {
|
||
if($filter[0] != '(') {
|
||
$filter = '('.$filter.')';
|
||
}
|
||
$combinedFilter.=$filter;
|
||
}
|
||
$combinedFilter.=')';
|
||
return $combinedFilter;
|
||
}
|
||
|
||
/**
|
||
* @brief creates a filter part for to perfrom search for users
|
||
* @param string $search the search term
|
||
* @return string the final filter part to use in LDAP searches
|
||
*/
|
||
public function getFilterPartForUserSearch($search) {
|
||
return $this->getFilterPartForSearch($search,
|
||
$this->connection->ldapAttributesForUserSearch,
|
||
$this->connection->ldapUserDisplayName);
|
||
}
|
||
|
||
/**
|
||
* @brief creates a filter part for to perfrom search for groups
|
||
* @param string $search the search term
|
||
* @return string the final filter part to use in LDAP searches
|
||
*/
|
||
public function getFilterPartForGroupSearch($search) {
|
||
return $this->getFilterPartForSearch($search,
|
||
$this->connection->ldapAttributesForGroupSearch,
|
||
$this->connection->ldapGroupDisplayName);
|
||
}
|
||
|
||
/**
|
||
* @brief creates a filter part for searches
|
||
* @param string $search the search term
|
||
* @param string $fallbackAttribute a fallback attribute in case the user
|
||
* did not define search attributes. Typically the display name attribute.
|
||
* @returns string the final filter part to use in LDAP searches
|
||
*/
|
||
private function getFilterPartForSearch($search, $searchAttributes, $fallbackAttribute) {
|
||
$filter = array();
|
||
$search = empty($search) ? '*' : '*'.$search.'*';
|
||
if(!is_array($searchAttributes) || count($searchAttributes) == 0) {
|
||
if(empty($fallbackAttribute)) {
|
||
return '';
|
||
}
|
||
$filter[] = $fallbackAttribute . '=' . $search;
|
||
} else {
|
||
foreach($searchAttributes as $attribute) {
|
||
$filter[] = $attribute . '=' . $search;
|
||
}
|
||
}
|
||
if(count($filter) == 1) {
|
||
return '('.$filter[0].')';
|
||
}
|
||
return $this->combineFilterWithOr($filter);
|
||
}
|
||
|
||
public function areCredentialsValid($name, $password) {
|
||
$name = $this->DNasBaseParameter($name);
|
||
$testConnection = clone $this->connection;
|
||
$credentials = array(
|
||
'ldapAgentName' => $name,
|
||
'ldapAgentPassword' => $password
|
||
);
|
||
if(!$testConnection->setConfiguration($credentials)) {
|
||
return false;
|
||
}
|
||
return $testConnection->bind();
|
||
}
|
||
|
||
/**
|
||
* @brief auto-detects the directory's UUID attribute
|
||
* @param $dn a known DN used to check against
|
||
* @param $force the detection should be run, even if it is not set to auto
|
||
* @returns true on success, false otherwise
|
||
*/
|
||
private function detectUuidAttribute($dn, $force = false) {
|
||
if(($this->connection->ldapUuidAttribute != 'auto') && !$force) {
|
||
return true;
|
||
}
|
||
|
||
//for now, supported (known) attributes are entryUUID, nsuniqueid, objectGUID
|
||
$testAttributes = array('entryuuid', 'nsuniqueid', 'objectguid', 'guid');
|
||
|
||
foreach($testAttributes as $attribute) {
|
||
\OCP\Util::writeLog('user_ldap', 'Testing '.$attribute.' as UUID attr', \OCP\Util::DEBUG);
|
||
|
||
$value = $this->readAttribute($dn, $attribute);
|
||
if(is_array($value) && isset($value[0]) && !empty($value[0])) {
|
||
\OCP\Util::writeLog('user_ldap', 'Setting '.$attribute.' as UUID attr', \OCP\Util::DEBUG);
|
||
$this->connection->ldapUuidAttribute = $attribute;
|
||
return true;
|
||
}
|
||
\OCP\Util::writeLog('user_ldap',
|
||
'The looked for uuid attr is not '.$attribute.', result was '.print_r($value, true),
|
||
\OCP\Util::DEBUG);
|
||
}
|
||
|
||
return false;
|
||
}
|
||
|
||
public function getUUID($dn) {
|
||
if($this->detectUuidAttribute($dn)) {
|
||
\OCP\Util::writeLog('user_ldap',
|
||
'UUID Checking \ UUID for '.$dn.' using '. $this->connection->ldapUuidAttribute,
|
||
\OCP\Util::DEBUG);
|
||
$uuid = $this->readAttribute($dn, $this->connection->ldapUuidAttribute);
|
||
if(!is_array($uuid) && $this->connection->ldapOverrideUuidAttribute) {
|
||
$this->detectUuidAttribute($dn, true);
|
||
$uuid = $this->readAttribute($dn, $this->connection->ldapUuidAttribute);
|
||
}
|
||
if(is_array($uuid) && isset($uuid[0]) && !empty($uuid[0])) {
|
||
$uuid = $uuid[0];
|
||
} else {
|
||
$uuid = false;
|
||
}
|
||
} else {
|
||
$uuid = false;
|
||
}
|
||
return $uuid;
|
||
}
|
||
|
||
/**
|
||
* @brief converts a binary ObjectGUID into a string representation
|
||
* @param $oguid the ObjectGUID in it's binary form as retrieved from AD
|
||
* @returns String
|
||
*
|
||
* converts a binary ObjectGUID into a string representation
|
||
* http://www.php.net/manual/en/function.ldap-get-values-len.php#73198
|
||
*/
|
||
private function convertObjectGUID2Str($oguid) {
|
||
$hex_guid = bin2hex($oguid);
|
||
$hex_guid_to_guid_str = '';
|
||
for($k = 1; $k <= 4; ++$k) {
|
||
$hex_guid_to_guid_str .= substr($hex_guid, 8 - 2 * $k, 2);
|
||
}
|
||
$hex_guid_to_guid_str .= '-';
|
||
for($k = 1; $k <= 2; ++$k) {
|
||
$hex_guid_to_guid_str .= substr($hex_guid, 12 - 2 * $k, 2);
|
||
}
|
||
$hex_guid_to_guid_str .= '-';
|
||
for($k = 1; $k <= 2; ++$k) {
|
||
$hex_guid_to_guid_str .= substr($hex_guid, 16 - 2 * $k, 2);
|
||
}
|
||
$hex_guid_to_guid_str .= '-' . substr($hex_guid, 16, 4);
|
||
$hex_guid_to_guid_str .= '-' . substr($hex_guid, 20);
|
||
|
||
return strtoupper($hex_guid_to_guid_str);
|
||
}
|
||
|
||
/**
|
||
* @brief converts a stored DN so it can be used as base parameter for LDAP queries
|
||
* @param $dn the DN
|
||
* @returns String
|
||
*
|
||
* converts a stored DN so it can be used as base parameter for LDAP queries
|
||
* internally we store them for usage in LDAP filters
|
||
*/
|
||
private function DNasBaseParameter($dn) {
|
||
return str_replace('\\5c', '\\', $dn);
|
||
}
|
||
|
||
/**
|
||
* @brief checks if the given DN is part of the given base DN(s)
|
||
* @param $dn the DN
|
||
* @param $bases array containing the allowed base DN or DNs
|
||
* @returns Boolean
|
||
*/
|
||
private function isDNPartOfBase($dn, $bases) {
|
||
$bases = $this->sanitizeDN($bases);
|
||
foreach($bases as $base) {
|
||
$belongsToBase = true;
|
||
if(mb_strripos($dn, $base, 0, 'UTF-8') !== (mb_strlen($dn, 'UTF-8')-mb_strlen($base))) {
|
||
$belongsToBase = false;
|
||
}
|
||
if($belongsToBase) {
|
||
break;
|
||
}
|
||
}
|
||
return $belongsToBase;
|
||
}
|
||
|
||
/**
|
||
* @brief get a cookie for the next LDAP paged search
|
||
* @param $base a string with the base DN for the search
|
||
* @param $filter the search filter to identify the correct search
|
||
* @param $limit the limit (or 'pageSize'), to identify the correct search well
|
||
* @param $offset the offset for the new search to identify the correct search really good
|
||
* @returns string containing the key or empty if none is cached
|
||
*/
|
||
private function getPagedResultCookie($base, $filter, $limit, $offset) {
|
||
if($offset == 0) {
|
||
return '';
|
||
}
|
||
$offset -= $limit;
|
||
//we work with cache here
|
||
$cachekey = 'lc' . crc32($base) . '-' . crc32($filter) . '-' . $limit . '-' . $offset;
|
||
$cookie = $this->connection->getFromCache($cachekey);
|
||
if(is_null($cookie)) {
|
||
$cookie = '';
|
||
}
|
||
return $cookie;
|
||
}
|
||
|
||
/**
|
||
* @brief set a cookie for LDAP paged search run
|
||
* @param $base a string with the base DN for the search
|
||
* @param $filter the search filter to identify the correct search
|
||
* @param $limit the limit (or 'pageSize'), to identify the correct search well
|
||
* @param $offset the offset for the run search to identify the correct search really good
|
||
* @param $cookie string containing the cookie returned by ldap_control_paged_result_response
|
||
* @return void
|
||
*/
|
||
private function setPagedResultCookie($base, $filter, $limit, $offset, $cookie) {
|
||
if(!empty($cookie)) {
|
||
$cachekey = 'lc' . dechex(crc32($base)) . '-' . dechex(crc32($filter)) . '-' .$limit . '-' . $offset;
|
||
$cookie = $this->connection->writeToCache($cachekey, $cookie);
|
||
}
|
||
}
|
||
|
||
/**
|
||
* @brief check wether the most recent paged search was successful. It flushed the state var. Use it always after a possible paged search.
|
||
* @return true on success, null or false otherwise
|
||
*/
|
||
public function getPagedSearchResultState() {
|
||
$result = $this->pagedSearchedSuccessful;
|
||
$this->pagedSearchedSuccessful = null;
|
||
return $result;
|
||
}
|
||
|
||
|
||
/**
|
||
* @brief prepares a paged search, if possible
|
||
* @param $filter the LDAP filter for the search
|
||
* @param $bases an array containing the LDAP subtree(s) that shall be searched
|
||
* @param $attr optional, when a certain attribute shall be filtered outside
|
||
* @param $limit
|
||
* @param $offset
|
||
*
|
||
*/
|
||
private function initPagedSearch($filter, $bases, $attr, $limit, $offset) {
|
||
$pagedSearchOK = false;
|
||
if($this->connection->hasPagedResultSupport && !is_null($limit)) {
|
||
$offset = intval($offset); //can be null
|
||
\OCP\Util::writeLog('user_ldap',
|
||
'initializing paged search for Filter'.$filter.' base '.print_r($bases, true)
|
||
.' attr '.print_r($attr, true). ' limit ' .$limit.' offset '.$offset,
|
||
\OCP\Util::INFO);
|
||
//get the cookie from the search for the previous search, required by LDAP
|
||
foreach($bases as $base) {
|
||
|
||
$cookie = $this->getPagedResultCookie($base, $filter, $limit, $offset);
|
||
if(empty($cookie) && ($offset > 0)) {
|
||
// no cookie known, although the offset is not 0. Maybe cache run out. We need
|
||
// to start all over *sigh* (btw, Dear Reader, did you need LDAP paged
|
||
// searching was designed by MSFT?)
|
||
$reOffset = ($offset - $limit) < 0 ? 0 : $offset - $limit;
|
||
//a bit recursive, $offset of 0 is the exit
|
||
\OCP\Util::writeLog('user_ldap', 'Looking for cookie L/O '.$limit.'/'.$reOffset, \OCP\Util::INFO);
|
||
$this->search($filter, array($base), $attr, $limit, $reOffset, true);
|
||
$cookie = $this->getPagedResultCookie($base, $filter, $limit, $offset);
|
||
//still no cookie? obviously, the server does not like us. Let's skip paging efforts.
|
||
//TODO: remember this, probably does not change in the next request...
|
||
if(empty($cookie)) {
|
||
$cookie = null;
|
||
}
|
||
}
|
||
if(!is_null($cookie)) {
|
||
if($offset > 0) {
|
||
\OCP\Util::writeLog('user_ldap', 'Cookie '.$cookie, \OCP\Util::INFO);
|
||
}
|
||
$pagedSearchOK = ldap_control_paged_result($this->connection->getConnectionResource(),
|
||
$limit, false, $cookie);
|
||
if(!$pagedSearchOK) {
|
||
return false;
|
||
}
|
||
\OCP\Util::writeLog('user_ldap', 'Ready for a paged search', \OCP\Util::INFO);
|
||
} else {
|
||
\OCP\Util::writeLog('user_ldap',
|
||
'No paged search for us, Cpt., Limit '.$limit.' Offset '.$offset,
|
||
\OCP\Util::INFO);
|
||
}
|
||
|
||
}
|
||
}
|
||
|
||
return $pagedSearchOK;
|
||
}
|
||
|
||
}
|