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<?php
/**
* @copyright Copyright (c) 2016, ownCloud, Inc.
*
* @author Aaron Wood <aaronjwood@gmail.com>
* @author Arthur Schiwon <blizzz@arthur-schiwon.de>
* @author Morris Jobke <hey@morrisjobke.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\Mapping;
/**
* Class AbstractMapping
* @package OCA\User_LDAP\Mapping
*/
abstract class AbstractMapping {
/**
* @var \OCP\IDBConnection $dbc
*/
protected $dbc;
/**
* returns the DB table name which holds the mappings
* @return string
*/
abstract protected function getTableName();
/**
* @param \OCP\IDBConnection $dbc
*/
public function __construct(\OCP\IDBConnection $dbc) {
$this->dbc = $dbc;
}
/**
* checks whether a provided string represents an existing table col
* @param string $col
* @return bool
*/
public function isColNameValid($col) {
switch($col) {
case 'ldap_dn':
case 'owncloud_name':
case 'directory_uuid':
return true;
default:
return false;
}
}
/**
* Gets the value of one column based on a provided value of another column
* @param string $fetchCol
* @param string $compareCol
* @param string $search
* @throws \Exception
* @return string|false
*/
protected function getXbyY($fetchCol, $compareCol, $search) {
if(!$this->isColNameValid($fetchCol)) {
//this is used internally only, but we don't want to risk
//having SQL injection at all.
throw new \Exception('Invalid Column Name');
}
$query = $this->dbc->prepare('
SELECT `' . $fetchCol . '`
FROM `'. $this->getTableName() .'`
WHERE `' . $compareCol . '` = ?
');
$res = $query->execute(array($search));
if($res !== false) {
return $query->fetchColumn();
}
return false;
}
/**
* Performs a DELETE or UPDATE query to the database.
* @param \Doctrine\DBAL\Driver\Statement $query
* @param array $parameters
* @return bool true if at least one row was modified, false otherwise
*/
protected function modify($query, $parameters) {
$result = $query->execute($parameters);
return ($result === true && $query->rowCount() > 0);
}
/**
* Gets the LDAP DN based on the provided name.
* Replaces Access::ocname2dn
* @param string $name
* @return string|false
*/
public function getDNByName($name) {
return $this->getXbyY('ldap_dn', 'owncloud_name', $name);
}
/**
* Updates the DN based on the given UUID
* @param string $fdn
* @param string $uuid
* @return bool
*/
public function setDNbyUUID($fdn, $uuid) {
$query = $this->dbc->prepare('
UPDATE `' . $this->getTableName() . '`
SET `ldap_dn` = ?
WHERE `directory_uuid` = ?
');
return $this->modify($query, array($fdn, $uuid));
}
/**
* Updates the UUID based on the given DN
*
* required by Migration/UUIDFix
*
* @param $uuid
* @param $fdn
* @return bool
*/
public function setUUIDbyDN($uuid, $fdn) {
$query = $this->dbc->prepare('
UPDATE `' . $this->getTableName() . '`
SET `directory_uuid` = ?
WHERE `ldap_dn` = ?
');
return $this->modify($query, [$uuid, $fdn]);
}
/**
* Gets the name based on the provided LDAP DN.
* @param string $fdn
* @return string|false
*/
public function getNameByDN($fdn) {
return $this->getXbyY('owncloud_name', 'ldap_dn', $fdn);
}
/**
* Searches mapped names by the giving string in the name column
* @param string $search
* @param string $prefixMatch
* @param string $postfixMatch
* @return string[]
*/
public function getNamesBySearch($search, $prefixMatch = "", $postfixMatch = "") {
$query = $this->dbc->prepare('
SELECT `owncloud_name`
FROM `'. $this->getTableName() .'`
WHERE `owncloud_name` LIKE ?
');
$res = $query->execute(array($prefixMatch.$this->dbc->escapeLikeParameter($search).$postfixMatch));
$names = array();
if($res !== false) {
while($row = $query->fetch()) {
$names[] = $row['owncloud_name'];
}
}
return $names;
}
/**
* Gets the name based on the provided LDAP UUID.
* @param string $uuid
* @return string|false
*/
public function getNameByUUID($uuid) {
return $this->getXbyY('owncloud_name', 'directory_uuid', $uuid);
}
/**
* Gets the UUID based on the provided LDAP DN
* @param string $dn
* @return false|string
* @throws \Exception
*/
public function getUUIDByDN($dn) {
return $this->getXbyY('directory_uuid', 'ldap_dn', $dn);
}
/**
* gets a piece of the mapping list
* @param int $offset
* @param int $limit
* @return array
*/
public function getList($offset = null, $limit = null) {
$query = $this->dbc->prepare('
SELECT
`ldap_dn` AS `dn`,
`owncloud_name` AS `name`,
`directory_uuid` AS `uuid`
FROM `' . $this->getTableName() . '`',
$limit,
$offset
);
$query->execute();
return $query->fetchAll();
}
/**
* attempts to map the given entry
* @param string $fdn fully distinguished name (from LDAP)
* @param string $name
* @param string $uuid a unique identifier as used in LDAP
* @return bool
*/
public function map($fdn, $name, $uuid) {
if(mb_strlen($fdn) > 255) {
\OC::$server->getLogger()->error(
'Cannot map, because the DN exceeds 255 characters: {dn}',
[
'app' => 'user_ldap',
'dn' => $fdn,
]
);
return false;
}
$row = array(
'ldap_dn' => $fdn,
'owncloud_name' => $name,
'directory_uuid' => $uuid
);
try {
$result = $this->dbc->insertIfNotExist($this->getTableName(), $row);
// insertIfNotExist returns values as int
return (bool)$result;
} catch (\Exception $e) {
return false;
}
}
/**
* removes a mapping based on the owncloud_name of the entry
* @param string $name
* @return bool
*/
public function unmap($name) {
$query = $this->dbc->prepare('
DELETE FROM `'. $this->getTableName() .'`
WHERE `owncloud_name` = ?');
return $this->modify($query, array($name));
}
/**
* Truncate's the mapping table
* @return bool
*/
public function clear() {
$sql = $this->dbc
->getDatabasePlatform()
->getTruncateTableSQL('`' . $this->getTableName() . '`');
return $this->dbc->prepare($sql)->execute();
}
/**
* returns the number of entries in the mappings table
*
* @return int
*/
public function count() {
$qb = $this->dbc->getQueryBuilder();
$query = $qb->select($qb->createFunction('COUNT(`ldap_dn`)'))
->from($this->getTableName());
$res = $query->execute();
$count = $res->fetchColumn();
$res->closeCursor();
return (int)$count;
}
}