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<?php
/**
* ownCloud
*
* @author Frank Karlitschek
* @copyright 2012 Frank Karlitschek frank@owncloud.org
*
* 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/>.
*
*/
/*
*
* The following SQL statement is just a help for developers and will not be
* executed!
*
* CREATE TABLE `users` (
* `uid` varchar(64) COLLATE utf8_unicode_ci NOT NULL,
* `password` varchar(255) COLLATE utf8_unicode_ci NOT NULL,
* PRIMARY KEY (`uid`)
* ) ENGINE=MyISAM DEFAULT CHARSET=utf8 COLLATE=utf8_unicode_ci;
*
*/
require_once 'phpass/PasswordHash.php';
/**
* Class for user management in a SQL Database (e.g. MySQL, SQLite)
*/
class OC_User_Database extends OC_User_Backend {
/**
* @var PasswordHash
*/
static private $hasher = null;
private function getHasher() {
if (!self::$hasher) {
//we don't want to use DES based crypt(), since it doesn't return a hash with a recognisable prefix
$forcePortable = (CRYPT_BLOWFISH != 1);
self::$hasher = new PasswordHash(8, $forcePortable);
}
return self::$hasher;
}
/**
* @brief Create a new user
* @param $uid The username of the user to create
* @param $password The password of the new user
* @returns true/false
*
* Creates a new user. Basic checking of username is done in OC_User
* itself, not in its subclasses.
*/
public function createUser($uid, $password) {
if ($this->userExists($uid)) {
return false;
} else {
$hasher = $this->getHasher();
$hash = $hasher->HashPassword($password . OC_Config::getValue('passwordsalt', ''));
$query = OC_DB::prepare('INSERT INTO `*PREFIX*users` ( `uid`, `password` ) VALUES( ?, ? )');
$result = $query->execute(array($uid, $hash));
return $result ? true : false;
}
}
/**
* @brief delete a user
* @param $uid The username of the user to delete
* @returns true/false
*
* Deletes a user
*/
public function deleteUser($uid) {
// Delete user-group-relation
$query = OC_DB::prepare('DELETE FROM `*PREFIX*users` WHERE `uid` = ?');
$query->execute(array($uid));
return true;
}
/**
* @brief Set password
* @param $uid The username
* @param $password The new password
* @returns true/false
*
* Change the password of a user
*/
public function setPassword($uid, $password) {
if ($this->userExists($uid)) {
$hasher = $this->getHasher();
$hash = $hasher->HashPassword($password . OC_Config::getValue('passwordsalt', ''));
$query = OC_DB::prepare('UPDATE `*PREFIX*users` SET `password` = ? WHERE `uid` = ?');
$query->execute(array($hash, $uid));
return true;
} else {
return false;
}
}
/**
* @brief Set display name
* @param $uid The username
* @param $displayName The new display name
* @returns true/false
*
* Change the display name of a user
*/
public function setDisplayName($uid, $displayName) {
if ($this->userExists($uid)) {
$query = OC_DB::prepare('UPDATE `*PREFIX*users` SET `displayname` = ? WHERE LOWER(`uid`) = ?');
$query->execute(array($displayName, $uid));
return true;
} else {
return false;
}
}
/**
* @brief get display name of the user
* @param $uid user ID of the user
* @return string display name
*/
public function getDisplayName($uid) {
$query = OC_DB::prepare('SELECT `displayname` FROM `*PREFIX*users` WHERE `uid` = ?');
$result = $query->execute(array($uid))->fetchAll();
$displayName = trim($result[0]['displayname'], ' ');
if (!empty($displayName)) {
return $displayName;
} else {
return $uid;
}
}
/**
* @brief Get a list of all display names
* @returns array with all displayNames (value) and the correspondig uids (key)
*
* Get a list of all display names and user ids.
*/
public function getDisplayNames($search = '', $limit = null, $offset = null) {
$displayNames = array();
$query = OC_DB::prepare('SELECT `uid`, `displayname` FROM `*PREFIX*users`'
. ' WHERE LOWER(`displayname`) LIKE LOWER(?) OR '
. 'LOWER(`uid`) LIKE LOWER(?)', $limit, $offset);
$result = $query->execute(array($search . '%', $search . '%'));
$users = array();
while ($row = $result->fetchRow()) {
$displayNames[$row['uid']] = $row['displayname'];
}
return $displayNames;
}
/**
* @brief Check if the password is correct
* @param $uid The username
* @param $password The password
* @returns string
*
* Check if the password is correct without logging in the user
* returns the user id or false
*/
public function checkPassword($uid, $password) {
$query = OC_DB::prepare('SELECT `uid`, `password` FROM `*PREFIX*users` WHERE LOWER(`uid`) = LOWER(?)');
$result = $query->execute(array($uid));
$row = $result->fetchRow();
if ($row) {
$storedHash = $row['password'];
if ($storedHash[0] == '$') { //the new phpass based hashing
$hasher = $this->getHasher();
if ($hasher->CheckPassword($password . OC_Config::getValue('passwordsalt', ''), $storedHash)) {
return $row['uid'];
} else {
return false;
}
} else { //old sha1 based hashing
if (sha1($password) == $storedHash) {
//upgrade to new hashing
$this->setPassword($row['uid'], $password);
return $row['uid'];
} else {
return false;
}
}
} else {
return false;
}
}
/**
* @brief Get a list of all users
* @returns array with all uids
*
* Get a list of all users.
*/
public function getUsers($search = '', $limit = null, $offset = null) {
$query = OC_DB::prepare('SELECT `uid` FROM `*PREFIX*users` WHERE LOWER(`uid`) LIKE LOWER(?)', $limit, $offset);
$result = $query->execute(array($search . '%'));
$users = array();
while ($row = $result->fetchRow()) {
$users[] = $row['uid'];
}
return $users;
}
/**
* @brief check if a user exists
* @param string $uid the username
* @return boolean
*/
public function userExists($uid) {
$query = OC_DB::prepare('SELECT COUNT(*) FROM `*PREFIX*users` WHERE LOWER(`uid`) = LOWER(?)');
$result = $query->execute(array($uid));
if (OC_DB::isError($result)) {
OC_Log::write('core', OC_DB::getErrorMessage($result), OC_Log::ERROR);
return false;
}
return $result->fetchOne() > 0;
}
/**
* @brief get the user's home directory
* @param string $uid the username
* @return string|false
*/
public function getHome($uid) {
if ($this->userExists($uid)) {
return OC_Config::getValue("datadirectory", OC::$SERVERROOT . "/data") . '/' . $uid;
} else {
return false;
}
}
/**
* @return bool
*/
public function hasUserListings() {
return true;
}
/**
* counts the users in the database
*
* @return int | bool
*/
public function countUsers() {
$query = OC_DB::prepare('SELECT COUNT(*) FROM `*PREFIX*users`');
$result = $query->execute();
if (OC_DB::isError($result)) {
OC_Log::write('core', OC_DB::getErrorMessage($result), OC_Log::ERROR);
return false;
}
return $result->fetchOne();
}
}
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