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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 {
static private $userGroupCache=array();
/**
* @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 has 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);
$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 = ?" );
$result = $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);
$query = OC_DB::prepare( "UPDATE *PREFIX*users SET password = ? WHERE uid = ?" );
$result = $query->execute( array( $hash, $uid ));
return true;
}
else{
return false;
}
}
/**
* @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 uid = ?" );
$result = $query->execute( array( $uid));
$row=$result->fetchRow();
if($row){
$storedHash=$row['password'];
if (substr($storedHash,0,1)=='$'){//the new phpass based hashing
$hasher=$this->getHasher();
if($hasher->CheckPassword($password, $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(){
$query = OC_DB::prepare( "SELECT uid FROM *PREFIX*users" );
$result = $query->execute();
$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 * FROM `*PREFIX*users` WHERE uid = ?" );
$result = $query->execute( array( $uid ));
return $result->numRows() > 0;
}
}
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