mirror of https://github.com/nextcloud/server
521 lines
14 KiB
PHP
521 lines
14 KiB
PHP
<?php
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/**
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* ownCloud
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*
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* @author Frank Karlitschek
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* @copyright 2012 Frank Karlitschek frank@owncloud.org
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU AFFERO GENERAL PUBLIC LICENSE
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* License as published by the Free Software Foundation; either
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* version 3 of the License, or any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU AFFERO GENERAL PUBLIC LICENSE for more details.
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*
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* You should have received a copy of the GNU Affero General Public
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* License along with this library. If not, see <http://www.gnu.org/licenses/>.
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*
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*/
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/**
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* This class provides wrapper methods for user management. Multiple backends are
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* supported. User management operations are delegated to the configured backend for
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* execution.
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*
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* Hooks provided:
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* pre_createUser(&run, uid, password)
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* post_createUser(uid, password)
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* pre_deleteUser(&run, uid)
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* post_deleteUser(uid)
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* pre_setPassword(&run, uid, password)
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* post_setPassword(uid, password)
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* pre_login(&run, uid)
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* post_login(uid)
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* logout()
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*/
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class OC_User {
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// The backend used for user management
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private static $_usedBackends = array();
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private static $_setupedBackends = array();
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// Backends available (except database)
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private static $_backends = array();
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/**
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* @brief registers backend
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* @param $name name of the backend
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* @returns true/false
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*
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* Makes a list of backends that can be used by other modules
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*/
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public static function registerBackend( $backend ) {
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self::$_backends[] = $backend;
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return true;
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}
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/**
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* @brief gets available backends
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* @returns array of backends
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*
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* Returns the names of all backends.
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*/
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public static function getBackends() {
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return self::$_backends;
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}
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/**
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* @brief gets used backends
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* @returns array of backends
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*
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* Returns the names of all used backends.
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*/
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public static function getUsedBackends() {
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return array_keys(self::$_usedBackends);
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}
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/**
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* @brief Adds the backend to the list of used backends
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* @param $backend default: database The backend to use for user managment
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* @returns true/false
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*
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* Set the User Authentication Module
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*/
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public static function useBackend( $backend = 'database' ) {
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if($backend instanceof OC_User_Interface) {
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OC_Log::write('core', 'Adding user backend instance of '.get_class($backend).'.', OC_Log::DEBUG);
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self::$_usedBackends[get_class($backend)]=$backend;
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} else {
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// You'll never know what happens
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if( null === $backend OR !is_string( $backend )) {
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$backend = 'database';
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}
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// Load backend
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switch( $backend ) {
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case 'database':
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case 'mysql':
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case 'sqlite':
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OC_Log::write('core', 'Adding user backend '.$backend.'.', OC_Log::DEBUG);
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self::$_usedBackends[$backend] = new OC_User_Database();
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break;
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default:
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OC_Log::write('core', 'Adding default user backend '.$backend.'.', OC_Log::DEBUG);
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$className = 'OC_USER_' . strToUpper($backend);
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self::$_usedBackends[$backend] = new $className();
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break;
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}
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}
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return true;
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}
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/**
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* remove all used backends
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*/
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public static function clearBackends() {
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self::$_usedBackends=array();
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}
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/**
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* setup the configured backends in config.php
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*/
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public static function setupBackends() {
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$backends=OC_Config::getValue('user_backends', array());
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foreach($backends as $i=>$config) {
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$class=$config['class'];
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$arguments=$config['arguments'];
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if(class_exists($class)) {
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if(array_search($i, self::$_setupedBackends)===false) {
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// make a reflection object
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$reflectionObj = new ReflectionClass($class);
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// use Reflection to create a new instance, using the $args
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$backend = $reflectionObj->newInstanceArgs($arguments);
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self::useBackend($backend);
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$_setupedBackends[]=$i;
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} else {
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OC_Log::write('core', 'User backend '.$class.' already initialized.', OC_Log::DEBUG);
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}
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} else {
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OC_Log::write('core', 'User backend '.$class.' not found.', OC_Log::ERROR);
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}
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}
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}
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/**
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* @brief Create a new user
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* @param $uid The username of the user to create
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* @param $password The password of the new user
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* @returns true/false
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*
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* Creates a new user. Basic checking of username is done in OC_User
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* itself, not in its subclasses.
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*
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* Allowed characters in the username are: "a-z", "A-Z", "0-9" and "_.@-"
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*/
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public static function createUser( $uid, $password ) {
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// Check the name for bad characters
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// Allowed are: "a-z", "A-Z", "0-9" and "_.@-"
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if( preg_match( '/[^a-zA-Z0-9 _\.@\-]/', $uid )) {
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throw new Exception('Only the following characters are allowed in a username: "a-z", "A-Z", "0-9", and "_.@-"');
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}
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// No empty username
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if(trim($uid) == '') {
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throw new Exception('A valid username must be provided');
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}
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// No empty password
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if(trim($password) == '') {
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throw new Exception('A valid password must be provided');
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}
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// Check if user already exists
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if( self::userExists($uid) ) {
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throw new Exception('The username is already being used');
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}
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$run = true;
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OC_Hook::emit( "OC_User", "pre_createUser", array( "run" => &$run, "uid" => $uid, "password" => $password ));
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if( $run ) {
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//create the user in the first backend that supports creating users
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foreach(self::$_usedBackends as $backend) {
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if(!$backend->implementsActions(OC_USER_BACKEND_CREATE_USER))
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continue;
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$backend->createUser($uid, $password);
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OC_Hook::emit( "OC_User", "post_createUser", array( "uid" => $uid, "password" => $password ));
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return self::userExists($uid);
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}
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}
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return false;
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}
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/**
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* @brief delete a user
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* @param $uid The username of the user to delete
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* @returns true/false
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*
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* Deletes a user
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*/
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public static function deleteUser( $uid ) {
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$run = true;
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OC_Hook::emit( "OC_User", "pre_deleteUser", array( "run" => &$run, "uid" => $uid ));
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if( $run ) {
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//delete the user from all backends
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foreach(self::$_usedBackends as $backend) {
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$backend->deleteUser($uid);
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}
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if (self::userExists($uid)) {
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return false;
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}
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// We have to delete the user from all groups
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foreach( OC_Group::getUserGroups( $uid ) as $i ) {
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OC_Group::removeFromGroup( $uid, $i );
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}
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// Delete the user's keys in preferences
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OC_Preferences::deleteUser($uid);
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// Delete user files in /data/
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OC_Helper::rmdirr(OC_Config::getValue( "datadirectory", OC::$SERVERROOT."/data" ) . '/'.$uid.'/');
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// Emit and exit
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OC_Hook::emit( "OC_User", "post_deleteUser", array( "uid" => $uid ));
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return true;
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}
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else{
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return false;
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}
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}
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/**
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* @brief Try to login a user
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* @param $uid The username of the user to log in
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* @param $password The password of the user
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* @returns true/false
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*
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* Log in a user and regenerate a new session - if the password is ok
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*/
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public static function login( $uid, $password ) {
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$run = true;
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OC_Hook::emit( "OC_User", "pre_login", array( "run" => &$run, "uid" => $uid ));
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if( $run ) {
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$uid = self::checkPassword( $uid, $password );
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$enabled = self::isEnabled($uid);
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if($uid && $enabled) {
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session_regenerate_id(true);
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self::setUserId($uid);
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OC_Hook::emit( "OC_User", "post_login", array( "uid" => $uid, 'password'=>$password ));
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return true;
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}
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}
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return false;
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}
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/**
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* @brief Sets user id for session and triggers emit
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*/
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public static function setUserId($uid) {
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$_SESSION['user_id'] = $uid;
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}
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/**
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* @brief Logs the current user out and kills all the session data
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*
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* Logout, destroys session
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*/
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public static function logout() {
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OC_Hook::emit( "OC_User", "logout", array());
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session_unset();
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session_destroy();
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OC_User::unsetMagicInCookie();
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}
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/**
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* @brief Check if the user is logged in
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* @returns true/false
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*
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* Checks if the user is logged in
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*/
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public static function isLoggedIn() {
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if( isset($_SESSION['user_id']) AND $_SESSION['user_id']) {
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OC_App::loadApps(array('authentication'));
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self::setupBackends();
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if (self::userExists($_SESSION['user_id']) ) {
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return true;
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}
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}
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return false;
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}
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/**
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* @brief Check if the user is an admin user
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* @param $uid uid of the admin
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* @returns bool
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*/
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public static function isAdminUser($uid) {
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if(OC_Group::inGroup($uid, 'admin' )) {
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return true;
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}
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return false;
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}
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/**
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* @brief get the user id of the user currently logged in.
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* @return string uid or false
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*/
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public static function getUser() {
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if( isset($_SESSION['user_id']) AND $_SESSION['user_id'] ) {
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return $_SESSION['user_id'];
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}
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else{
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return false;
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}
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}
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/**
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* @brief Autogenerate a password
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* @returns string
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*
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* generates a password
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*/
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public static function generatePassword() {
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return uniqId();
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}
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/**
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* @brief Set password
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* @param $uid The username
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* @param $password The new password
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* @returns true/false
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*
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* Change the password of a user
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*/
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public static function setPassword( $uid, $password ) {
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$run = true;
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OC_Hook::emit( "OC_User", "pre_setPassword", array( "run" => &$run, "uid" => $uid, "password" => $password ));
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if( $run ) {
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$success = false;
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foreach(self::$_usedBackends as $backend) {
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if($backend->implementsActions(OC_USER_BACKEND_SET_PASSWORD)) {
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if($backend->userExists($uid)) {
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$success |= $backend->setPassword($uid, $password);
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}
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}
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}
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// invalidate all login cookies
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OC_Preferences::deleteApp($uid, 'login_token');
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OC_Hook::emit( "OC_User", "post_setPassword", array( "uid" => $uid, "password" => $password ));
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return $success;
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}
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else{
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return false;
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}
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}
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/**
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* @brief Check if the password is correct
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* @param $uid The username
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* @param $password The password
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* @returns string
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*
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* Check if the password is correct without logging in the user
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* returns the user id or false
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*/
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public static function checkPassword( $uid, $password ) {
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foreach(self::$_usedBackends as $backend) {
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if($backend->implementsActions(OC_USER_BACKEND_CHECK_PASSWORD)) {
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$result=$backend->checkPassword( $uid, $password );
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if($result) {
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return $result;
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}
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}
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}
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}
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/**
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* @brief Check if the password is correct
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* @param string $uid The username
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* @param string $password The password
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* @returns string
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*
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* returns the path to the users home directory
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*/
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public static function getHome($uid) {
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foreach(self::$_usedBackends as $backend) {
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if($backend->implementsActions(OC_USER_BACKEND_GET_HOME)) {
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$result=$backend->getHome($uid);
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if($result) {
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return $result;
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}
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}
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}
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return OC_Config::getValue( "datadirectory", OC::$SERVERROOT."/data" ) . '/' . $uid;
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}
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/**
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* @brief Get a list of all users
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* @returns array with all uids
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*
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* Get a list of all users.
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*/
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public static function getUsers($search = '', $limit = null, $offset = null) {
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$users = array();
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foreach (self::$_usedBackends as $backend) {
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$backendUsers = $backend->getUsers($search, $limit, $offset);
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if (is_array($backendUsers)) {
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$users = array_merge($users, $backendUsers);
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}
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}
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asort($users);
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return $users;
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}
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/**
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* @brief check if a user exists
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* @param string $uid the username
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* @param string $excludingBackend (default none)
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* @return boolean
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*/
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public static function userExists($uid, $excludingBackend=null) {
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foreach(self::$_usedBackends as $backend) {
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if (!is_null($excludingBackend) && !strcmp(get_class($backend),$excludingBackend)) {
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OC_Log::write('OC_User', $excludingBackend . 'excluded from user existance check.', OC_Log::DEBUG);
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continue;
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}
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$result=$backend->userExists($uid);
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if($result===true) {
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return true;
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}
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}
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return false;
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}
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/**
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* disables a user
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* @param string $userid the user to disable
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*/
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public static function disableUser($userid) {
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$sql = "INSERT INTO `*PREFIX*preferences` (`userid`, `appid`, `configkey`, `configvalue`) VALUES(?, ?, ?, ?)";
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$stmt = OC_DB::prepare($sql);
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if ( ! OC_DB::isError($stmt) ) {
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$result = $stmt->execute(array($userid, 'core', 'enabled', 'false'));
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if ( OC_DB::isError($result) ) {
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OC_Log::write('OC_User', 'could not enable user: '. OC_DB::getErrorMessage($result), OC_Log::ERROR);
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}
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} else {
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OC_Log::write('OC_User', 'could not disable user: '. OC_DB::getErrorMessage($stmt), OC_Log::ERROR);
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}
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}
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/**
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* enable a user
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* @param string $userid
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*/
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public static function enableUser($userid) {
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$sql = "DELETE FROM `*PREFIX*preferences` WHERE `userid` = ? AND `appid` = ? AND `configkey` = ? AND `configvalue` = ?";
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$stmt = OC_DB::prepare($sql);
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if ( ! OC_DB::isError($stmt) ) {
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$result = $stmt->execute(array($userid, 'core', 'enabled', 'false'));
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if ( OC_DB::isError($result) ) {
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OC_Log::write('OC_User', 'could not enable user: '. OC_DB::getErrorMessage($result), OC_Log::ERROR);
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}
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} else {
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OC_Log::write('OC_User', 'could not enable user: '. OC_DB::getErrorMessage($stmt), OC_Log::ERROR);
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}
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}
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/**
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* checks if a user is enabled
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* @param string $userid
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* @return bool
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*/
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public static function isEnabled($userid) {
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$sql = "SELECT `userid` FROM `*PREFIX*preferences` WHERE `userid` = ? AND `appid` = ? AND `configkey` = ? AND `configvalue` = ?";
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$stmt = OC_DB::prepare($sql);
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if ( ! OC_DB::isError($stmt) ) {
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$result = $stmt->execute(array($userid, 'core', 'enabled', 'false'));
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if ( ! OC_DB::isError($result) ) {
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return $result->numRows() ? false : true;
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} else {
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OC_Log::write('OC_User', 'could not check if enabled: '. OC_DB::getErrorMessage($result), OC_Log::ERROR);
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}
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} else {
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OC_Log::write('OC_User', 'could not check if enabled: '. OC_DB::getErrorMessage($stmt), OC_Log::ERROR);
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}
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return false;
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}
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/**
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* @brief Set cookie value to use in next page load
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* @param string $username username to be set
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*/
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public static function setMagicInCookie($username, $token) {
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$secure_cookie = OC_Config::getValue("forcessl", false);
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$expires = time() + OC_Config::getValue('remember_login_cookie_lifetime', 60*60*24*15);
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setcookie("oc_username", $username, $expires, '', '', $secure_cookie);
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setcookie("oc_token", $token, $expires, '', '', $secure_cookie, true);
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setcookie("oc_remember_login", true, $expires, '', '', $secure_cookie);
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}
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/**
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* @brief Remove cookie for "remember username"
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*/
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public static function unsetMagicInCookie() {
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unset($_COOKIE["oc_username"]);
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unset($_COOKIE["oc_token"]);
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unset($_COOKIE["oc_remember_login"]);
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setcookie("oc_username", null, -1);
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setcookie("oc_token", null, -1);
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setcookie("oc_remember_login", null, -1);
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}
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}
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