eb159d8f5a
The variables are set conditional later, but all condition branches set it or the variable is not used outside that scope Change-Id: Ic9612915db507028ad4733a061d3ce9be3babfb6
1134 lines
36 KiB
PHP
1134 lines
36 KiB
PHP
<?php
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/**
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* MediaWiki\Session entry point
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program 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 General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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* http://www.gnu.org/copyleft/gpl.html
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*
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* @file
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* @ingroup Session
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*/
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namespace MediaWiki\Session;
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use BagOStuff;
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use CachedBagOStuff;
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use Config;
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use FauxRequest;
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use MediaWiki\HookContainer\HookContainer;
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use MediaWiki\HookContainer\HookRunner;
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use MediaWiki\MainConfigNames;
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use MediaWiki\MediaWikiServices;
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use MediaWiki\User\UserNameUtils;
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use MWException;
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use Psr\Log\LoggerInterface;
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use Psr\Log\LogLevel;
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use User;
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use WebRequest;
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/**
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* This serves as the entry point to the MediaWiki session handling system.
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*
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* Most methods here are for internal use by session handling code. Other callers
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* should only use getGlobalSession and the methods of SessionManagerInterface;
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* the rest of the functionality is exposed via MediaWiki\Session\Session methods.
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*
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* To provide custom session handling, implement a MediaWiki\Session\SessionProvider.
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*
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* @anchor SessionManager-storage-expectations
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*
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* ## Storage expectations
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*
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* The SessionManager should be configured with a very fast storage system that is
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* optimized for holding key-value pairs. It expects:
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*
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* - Low latencies. Session data is read or written to during nearly all web requests from
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* people that have contributed to or otherwise engaged with the site, including those not
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* logged in with a registered account.
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*
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* - Locally writable data. The data must be writable from both primary and secondary
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* data centres.
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*
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* - Locally latest reads. Writes must by default be immediately consistent within
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* the local data centre, and visible to other reads from web servers in that data centre.
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*
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* - Replication. The data must be eventually consistent across all data centres. Writes
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* are either synced to all remote data centres, or locally overwritten by another write
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* that is.
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*
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* The SessionManager uses `set()` and `delete()` for write operations, which should be
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* synchronous in the local data centre, and replicate asynchronously to any others.
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*
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* @ingroup Session
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* @since 1.27
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* @see https://www.mediawiki.org/wiki/Manual:SessionManager_and_AuthManager
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*/
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class SessionManager implements SessionManagerInterface {
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/** @var SessionManager|null */
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private static $instance = null;
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/** @var Session|null */
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private static $globalSession = null;
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/** @var WebRequest|null */
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private static $globalSessionRequest = null;
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/** @var LoggerInterface */
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private $logger;
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/** @var HookContainer */
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private $hookContainer;
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/** @var HookRunner */
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private $hookRunner;
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/** @var Config */
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private $config;
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/** @var UserNameUtils */
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private $userNameUtils;
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/** @var CachedBagOStuff|null */
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private $store;
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/** @var SessionProvider[] */
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private $sessionProviders = null;
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/** @var string[] */
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private $varyCookies = null;
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/** @var array */
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private $varyHeaders = null;
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/** @var SessionBackend[] */
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private $allSessionBackends = [];
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/** @var SessionId[] */
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private $allSessionIds = [];
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/** @var true[] */
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private $preventUsers = [];
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/**
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* Get the global SessionManager
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* @return self
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*/
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public static function singleton() {
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if ( self::$instance === null ) {
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self::$instance = new self();
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}
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return self::$instance;
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}
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/**
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* If PHP's session_id() has been set, returns that session. Otherwise
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* returns the session for RequestContext::getMain()->getRequest().
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*
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* @return Session
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*/
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public static function getGlobalSession(): Session {
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if ( !PHPSessionHandler::isEnabled() ) {
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$id = '';
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} else {
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$id = session_id();
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}
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$request = \RequestContext::getMain()->getRequest();
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if (
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!self::$globalSession // No global session is set up yet
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|| self::$globalSessionRequest !== $request // The global WebRequest changed
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|| $id !== '' && self::$globalSession->getId() !== $id // Someone messed with session_id()
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) {
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self::$globalSessionRequest = $request;
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if ( $id === '' ) {
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// session_id() wasn't used, so fetch the Session from the WebRequest.
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// We use $request->getSession() instead of $singleton->getSessionForRequest()
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// because doing the latter would require a public
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// "$request->getSessionId()" method that would confuse end
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// users by returning SessionId|null where they'd expect it to
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// be short for $request->getSession()->getId(), and would
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// wind up being a duplicate of the code in
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// $request->getSession() anyway.
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self::$globalSession = $request->getSession();
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} else {
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// Someone used session_id(), so we need to follow suit.
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// Note this overwrites whatever session might already be
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// associated with $request with the one for $id.
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self::$globalSession = self::singleton()->getSessionById( $id, true, $request )
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?: $request->getSession();
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}
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}
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return self::$globalSession;
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}
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/**
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* @param array $options
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* - config: Config to fetch configuration from. Defaults to the default 'main' config.
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* - logger: LoggerInterface to use for logging. Defaults to the 'session' channel.
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* - store: BagOStuff to store session data in.
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*/
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public function __construct( $options = [] ) {
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if ( isset( $options['config'] ) ) {
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$this->config = $options['config'];
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if ( !$this->config instanceof Config ) {
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throw new \InvalidArgumentException(
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'$options[\'config\'] must be an instance of Config'
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);
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}
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} else {
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$this->config = MediaWikiServices::getInstance()->getMainConfig();
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}
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if ( isset( $options['logger'] ) ) {
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if ( !$options['logger'] instanceof LoggerInterface ) {
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throw new \InvalidArgumentException(
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'$options[\'logger\'] must be an instance of LoggerInterface'
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);
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}
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$this->setLogger( $options['logger'] );
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} else {
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$this->setLogger( \MediaWiki\Logger\LoggerFactory::getInstance( 'session' ) );
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}
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if ( isset( $options['hookContainer'] ) ) {
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$this->setHookContainer( $options['hookContainer'] );
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} else {
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$this->setHookContainer( MediaWikiServices::getInstance()->getHookContainer() );
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}
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if ( isset( $options['store'] ) ) {
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if ( !$options['store'] instanceof BagOStuff ) {
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throw new \InvalidArgumentException(
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'$options[\'store\'] must be an instance of BagOStuff'
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);
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}
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$store = $options['store'];
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} else {
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$store = \ObjectCache::getInstance( $this->config->get( MainConfigNames::SessionCacheType ) );
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}
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$this->logger->debug( 'SessionManager using store ' . get_class( $store ) );
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$this->store = $store instanceof CachedBagOStuff ? $store : new CachedBagOStuff( $store );
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$this->userNameUtils = MediawikiServices::getInstance()->getUserNameUtils();
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register_shutdown_function( [ $this, 'shutdown' ] );
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}
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public function setLogger( LoggerInterface $logger ) {
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$this->logger = $logger;
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}
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/**
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* @internal
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* @param HookContainer $hookContainer
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*/
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public function setHookContainer( HookContainer $hookContainer ) {
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$this->hookContainer = $hookContainer;
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$this->hookRunner = new HookRunner( $hookContainer );
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}
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public function getSessionForRequest( WebRequest $request ) {
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$info = $this->getSessionInfoForRequest( $request );
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if ( !$info ) {
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$session = $this->getInitialSession( $request );
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} else {
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$session = $this->getSessionFromInfo( $info, $request );
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}
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return $session;
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}
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public function getSessionById( $id, $create = false, WebRequest $request = null ) {
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if ( !self::validateSessionId( $id ) ) {
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throw new \InvalidArgumentException( 'Invalid session ID' );
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}
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if ( !$request ) {
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$request = new FauxRequest;
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}
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$session = null;
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$info = new SessionInfo( SessionInfo::MIN_PRIORITY, [ 'id' => $id, 'idIsSafe' => true ] );
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// If we already have the backend loaded, use it directly
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if ( isset( $this->allSessionBackends[$id] ) ) {
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return $this->getSessionFromInfo( $info, $request );
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}
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// Test if the session is in storage, and if so try to load it.
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$key = $this->store->makeKey( 'MWSession', $id );
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if ( is_array( $this->store->get( $key ) ) ) {
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$create = false; // If loading fails, don't bother creating because it probably will fail too.
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if ( $this->loadSessionInfoFromStore( $info, $request ) ) {
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$session = $this->getSessionFromInfo( $info, $request );
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}
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}
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if ( $create && $session === null ) {
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try {
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$session = $this->getEmptySessionInternal( $request, $id );
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} catch ( \Exception $ex ) {
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$this->logger->error( 'Failed to create empty session: {exception}',
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[
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'method' => __METHOD__,
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'exception' => $ex,
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] );
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$session = null;
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}
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}
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return $session;
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}
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public function getEmptySession( WebRequest $request = null ) {
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return $this->getEmptySessionInternal( $request );
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}
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/**
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* @see SessionManagerInterface::getEmptySession
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* @param WebRequest|null $request
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* @param string|null $id ID to force on the new session
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* @return Session
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*/
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private function getEmptySessionInternal( WebRequest $request = null, $id = null ) {
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if ( $id !== null ) {
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if ( !self::validateSessionId( $id ) ) {
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throw new \InvalidArgumentException( 'Invalid session ID' );
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}
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$key = $this->store->makeKey( 'MWSession', $id );
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if ( is_array( $this->store->get( $key ) ) ) {
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throw new \InvalidArgumentException( 'Session ID already exists' );
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}
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}
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if ( !$request ) {
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$request = new FauxRequest;
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}
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$infos = [];
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foreach ( $this->getProviders() as $provider ) {
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$info = $provider->newSessionInfo( $id );
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if ( !$info ) {
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continue;
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}
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if ( $info->getProvider() !== $provider ) {
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throw new \UnexpectedValueException(
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"$provider returned an empty session info for a different provider: $info"
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);
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}
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if ( $id !== null && $info->getId() !== $id ) {
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throw new \UnexpectedValueException(
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"$provider returned empty session info with a wrong id: " .
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$info->getId() . ' != ' . $id
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);
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}
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if ( !$info->isIdSafe() ) {
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throw new \UnexpectedValueException(
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"$provider returned empty session info with id flagged unsafe"
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);
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}
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$compare = $infos ? SessionInfo::compare( $infos[0], $info ) : -1;
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if ( $compare > 0 ) {
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continue;
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}
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if ( $compare === 0 ) {
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$infos[] = $info;
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} else {
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$infos = [ $info ];
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}
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}
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// Make sure there's exactly one
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if ( count( $infos ) > 1 ) {
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throw new \UnexpectedValueException(
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'Multiple empty sessions tied for top priority: ' . implode( ', ', $infos )
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);
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} elseif ( count( $infos ) < 1 ) {
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throw new \UnexpectedValueException( 'No provider could provide an empty session!' );
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}
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// @phan-suppress-next-line PhanTypePossiblyInvalidDimOffset False positive
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return $this->getSessionFromInfo( $infos[0], $request );
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}
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/**
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* Create a new session. Populate it with a default secret token, to avoid
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* a session replication race on a subsequent edit/save cycle (e.g. in
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* a multi-dc setup, ref https://phabricator.wikimedia.org/T279664#8139533).
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*
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* @param WebRequest|null $request Corresponding request. Any existing
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* session associated with this WebRequest object will be overwritten.
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* @return Session
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*/
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private function getInitialSession( WebRequest $request = null ) {
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$session = $this->getEmptySession( $request );
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$session->getToken();
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return $session;
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}
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public function invalidateSessionsForUser( User $user ) {
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$user->setToken();
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$user->saveSettings();
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foreach ( $this->getProviders() as $provider ) {
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$provider->invalidateSessionsForUser( $user );
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}
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}
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public function getVaryHeaders() {
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// @codeCoverageIgnoreStart
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if ( defined( 'MW_NO_SESSION' ) && MW_NO_SESSION !== 'warn' ) {
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return [];
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}
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// @codeCoverageIgnoreEnd
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if ( $this->varyHeaders === null ) {
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$headers = [];
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foreach ( $this->getProviders() as $provider ) {
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foreach ( $provider->getVaryHeaders() as $header => $options ) {
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# Note that the $options value returned has been deprecated
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# and is ignored.
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$headers[$header] = null;
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}
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}
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$this->varyHeaders = $headers;
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}
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return $this->varyHeaders;
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}
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public function getVaryCookies() {
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// @codeCoverageIgnoreStart
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if ( defined( 'MW_NO_SESSION' ) && MW_NO_SESSION !== 'warn' ) {
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return [];
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}
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// @codeCoverageIgnoreEnd
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if ( $this->varyCookies === null ) {
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$cookies = [];
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foreach ( $this->getProviders() as $provider ) {
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$cookies = array_merge( $cookies, $provider->getVaryCookies() );
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}
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$this->varyCookies = array_values( array_unique( $cookies ) );
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}
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return $this->varyCookies;
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}
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/**
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* Validate a session ID
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* @param string $id
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* @return bool
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*/
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public static function validateSessionId( $id ) {
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return is_string( $id ) && preg_match( '/^[a-zA-Z0-9_-]{32,}$/', $id );
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}
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/***************************************************************************/
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// region Internal methods
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/** @name Internal methods */
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/**
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* Prevent future sessions for the user
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*
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* The intention is that the named account will never again be usable for
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* normal login (i.e. there is no way to undo the prevention of access).
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*
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* @internal For use from \User::newSystemUser only
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* @param string $username
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*/
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public function preventSessionsForUser( $username ) {
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$this->preventUsers[$username] = true;
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// Instruct the session providers to kill any other sessions too.
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foreach ( $this->getProviders() as $provider ) {
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$provider->preventSessionsForUser( $username );
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}
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}
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/**
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* Test if a user is prevented
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* @internal For use from SessionBackend only
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* @param string $username
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* @return bool
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*/
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public function isUserSessionPrevented( $username ) {
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return !empty( $this->preventUsers[$username] );
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}
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/**
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* Get the available SessionProviders
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* @return SessionProvider[]
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*/
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protected function getProviders() {
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if ( $this->sessionProviders === null ) {
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$this->sessionProviders = [];
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$objectFactory = MediaWikiServices::getInstance()->getObjectFactory();
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foreach ( $this->config->get( MainConfigNames::SessionProviders ) as $spec ) {
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/** @var SessionProvider */
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$provider = $objectFactory->createObject( $spec );
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$provider->init(
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$this->logger,
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$this->config,
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$this,
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$this->hookContainer,
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$this->userNameUtils
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);
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if ( isset( $this->sessionProviders[(string)$provider] ) ) {
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// @phan-suppress-next-line PhanTypeSuspiciousStringExpression
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throw new \UnexpectedValueException( "Duplicate provider name \"$provider\"" );
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}
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$this->sessionProviders[(string)$provider] = $provider;
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}
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}
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return $this->sessionProviders;
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}
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/**
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* Get a session provider by name
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*
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* Generally, this will only be used by internal implementation of some
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* special session-providing mechanism. General purpose code, if it needs
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* to access a SessionProvider at all, will use Session::getProvider().
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*
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* @param string $name
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* @return SessionProvider|null
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*/
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public function getProvider( $name ) {
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$providers = $this->getProviders();
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return $providers[$name] ?? null;
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}
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/**
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* Save all active sessions on shutdown
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* @internal For internal use with register_shutdown_function()
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*/
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public function shutdown() {
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if ( $this->allSessionBackends ) {
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$this->logger->debug( 'Saving all sessions on shutdown' );
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if ( session_id() !== '' ) {
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// @codeCoverageIgnoreStart
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session_write_close();
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}
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// @codeCoverageIgnoreEnd
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foreach ( $this->allSessionBackends as $backend ) {
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$backend->shutdown();
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}
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}
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}
|
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|
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/**
|
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* Fetch the SessionInfo(s) for a request
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|
* @param WebRequest $request
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* @return SessionInfo|null
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*/
|
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private function getSessionInfoForRequest( WebRequest $request ) {
|
|
// Call all providers to fetch "the" session
|
|
$infos = [];
|
|
foreach ( $this->getProviders() as $provider ) {
|
|
$info = $provider->provideSessionInfo( $request );
|
|
if ( !$info ) {
|
|
continue;
|
|
}
|
|
if ( $info->getProvider() !== $provider ) {
|
|
throw new \UnexpectedValueException(
|
|
"$provider returned session info for a different provider: $info"
|
|
);
|
|
}
|
|
$infos[] = $info;
|
|
}
|
|
|
|
// Sort the SessionInfos. Then find the first one that can be
|
|
// successfully loaded, and then all the ones after it with the same
|
|
// priority.
|
|
usort( $infos, [ SessionInfo::class, 'compare' ] );
|
|
$retInfos = [];
|
|
while ( $infos ) {
|
|
$info = array_pop( $infos );
|
|
if ( $this->loadSessionInfoFromStore( $info, $request ) ) {
|
|
$retInfos[] = $info;
|
|
while ( $infos ) {
|
|
/** @var SessionInfo $info */
|
|
$info = array_pop( $infos );
|
|
if ( SessionInfo::compare( $retInfos[0], $info ) ) {
|
|
// We hit a lower priority, stop checking.
|
|
break;
|
|
}
|
|
if ( $this->loadSessionInfoFromStore( $info, $request ) ) {
|
|
// This is going to error out below, but we want to
|
|
// provide a complete list.
|
|
$retInfos[] = $info;
|
|
} else {
|
|
// Session load failed, so unpersist it from this request
|
|
$this->logUnpersist( $info, $request );
|
|
$info->getProvider()->unpersistSession( $request );
|
|
}
|
|
}
|
|
} else {
|
|
// Session load failed, so unpersist it from this request
|
|
$this->logUnpersist( $info, $request );
|
|
$info->getProvider()->unpersistSession( $request );
|
|
}
|
|
}
|
|
|
|
if ( count( $retInfos ) > 1 ) {
|
|
throw new SessionOverflowException(
|
|
$retInfos,
|
|
'Multiple sessions for this request tied for top priority: ' . implode( ', ', $retInfos )
|
|
);
|
|
}
|
|
|
|
return $retInfos ? $retInfos[0] : null;
|
|
}
|
|
|
|
/**
|
|
* Load and verify the session info against the store
|
|
*
|
|
* @param SessionInfo &$info Will likely be replaced with an updated SessionInfo instance
|
|
* @param WebRequest $request
|
|
* @return bool Whether the session info matches the stored data (if any)
|
|
*/
|
|
private function loadSessionInfoFromStore( SessionInfo &$info, WebRequest $request ) {
|
|
$key = $this->store->makeKey( 'MWSession', $info->getId() );
|
|
$blob = $this->store->get( $key );
|
|
|
|
// If we got data from the store and the SessionInfo says to force use,
|
|
// "fail" means to delete the data from the store and retry. Otherwise,
|
|
// "fail" is just return false.
|
|
if ( $info->forceUse() && $blob !== false ) {
|
|
$failHandler = function () use ( $key, &$info, $request ) {
|
|
$this->store->delete( $key );
|
|
return $this->loadSessionInfoFromStore( $info, $request );
|
|
};
|
|
} else {
|
|
$failHandler = static function () {
|
|
return false;
|
|
};
|
|
}
|
|
|
|
$newParams = [];
|
|
|
|
if ( $blob !== false ) {
|
|
// Double check: blob must be an array, if it's saved at all
|
|
if ( !is_array( $blob ) ) {
|
|
$this->logger->warning( 'Session "{session}": Bad data', [
|
|
'session' => $info->__toString(),
|
|
] );
|
|
$this->store->delete( $key );
|
|
return $failHandler();
|
|
}
|
|
|
|
// Double check: blob has data and metadata arrays
|
|
if ( !isset( $blob['data'] ) || !is_array( $blob['data'] ) ||
|
|
!isset( $blob['metadata'] ) || !is_array( $blob['metadata'] )
|
|
) {
|
|
$this->logger->warning( 'Session "{session}": Bad data structure', [
|
|
'session' => $info->__toString(),
|
|
] );
|
|
$this->store->delete( $key );
|
|
return $failHandler();
|
|
}
|
|
|
|
$data = $blob['data'];
|
|
$metadata = $blob['metadata'];
|
|
|
|
// Double check: metadata must be an array and must contain certain
|
|
// keys, if it's saved at all
|
|
if ( !array_key_exists( 'userId', $metadata ) ||
|
|
!array_key_exists( 'userName', $metadata ) ||
|
|
!array_key_exists( 'userToken', $metadata ) ||
|
|
!array_key_exists( 'provider', $metadata )
|
|
) {
|
|
$this->logger->warning( 'Session "{session}": Bad metadata', [
|
|
'session' => $info->__toString(),
|
|
] );
|
|
$this->store->delete( $key );
|
|
return $failHandler();
|
|
}
|
|
|
|
// First, load the provider from metadata, or validate it against the metadata.
|
|
$provider = $info->getProvider();
|
|
if ( $provider === null ) {
|
|
$newParams['provider'] = $provider = $this->getProvider( $metadata['provider'] );
|
|
if ( !$provider ) {
|
|
$this->logger->warning(
|
|
'Session "{session}": Unknown provider ' . $metadata['provider'],
|
|
[
|
|
'session' => $info->__toString(),
|
|
]
|
|
);
|
|
$this->store->delete( $key );
|
|
return $failHandler();
|
|
}
|
|
} elseif ( $metadata['provider'] !== (string)$provider ) {
|
|
$this->logger->warning( 'Session "{session}": Wrong provider ' .
|
|
$metadata['provider'] . ' !== ' . $provider,
|
|
[
|
|
'session' => $info->__toString(),
|
|
] );
|
|
return $failHandler();
|
|
}
|
|
|
|
// Load provider metadata from metadata, or validate it against the metadata
|
|
$providerMetadata = $info->getProviderMetadata();
|
|
if ( isset( $metadata['providerMetadata'] ) ) {
|
|
if ( $providerMetadata === null ) {
|
|
$newParams['metadata'] = $metadata['providerMetadata'];
|
|
} else {
|
|
try {
|
|
$newProviderMetadata = $provider->mergeMetadata(
|
|
$metadata['providerMetadata'], $providerMetadata
|
|
);
|
|
if ( $newProviderMetadata !== $providerMetadata ) {
|
|
$newParams['metadata'] = $newProviderMetadata;
|
|
}
|
|
} catch ( MetadataMergeException $ex ) {
|
|
$this->logger->warning(
|
|
'Session "{session}": Metadata merge failed: {exception}',
|
|
[
|
|
'session' => $info->__toString(),
|
|
'exception' => $ex,
|
|
] + $ex->getContext()
|
|
);
|
|
return $failHandler();
|
|
}
|
|
}
|
|
}
|
|
|
|
// Next, load the user from metadata, or validate it against the metadata.
|
|
$userInfo = $info->getUserInfo();
|
|
if ( !$userInfo ) {
|
|
// For loading, id is preferred to name.
|
|
try {
|
|
if ( $metadata['userId'] ) {
|
|
$userInfo = UserInfo::newFromId( $metadata['userId'] );
|
|
} elseif ( $metadata['userName'] !== null ) { // Shouldn't happen, but just in case
|
|
$userInfo = UserInfo::newFromName( $metadata['userName'] );
|
|
} else {
|
|
$userInfo = UserInfo::newAnonymous();
|
|
}
|
|
} catch ( \InvalidArgumentException $ex ) {
|
|
$this->logger->error( 'Session "{session}": {exception}', [
|
|
'session' => $info->__toString(),
|
|
'exception' => $ex,
|
|
] );
|
|
return $failHandler();
|
|
}
|
|
$newParams['userInfo'] = $userInfo;
|
|
} else {
|
|
// User validation passes if user ID matches, or if there
|
|
// is no saved ID and the names match.
|
|
if ( $metadata['userId'] ) {
|
|
if ( $metadata['userId'] !== $userInfo->getId() ) {
|
|
$this->logger->warning(
|
|
'Session "{session}": User ID mismatch, {uid_a} !== {uid_b}',
|
|
[
|
|
'session' => $info->__toString(),
|
|
'uid_a' => $metadata['userId'],
|
|
'uid_b' => $userInfo->getId(),
|
|
] );
|
|
return $failHandler();
|
|
}
|
|
|
|
// If the user was renamed, probably best to fail here.
|
|
if ( $metadata['userName'] !== null &&
|
|
$userInfo->getName() !== $metadata['userName']
|
|
) {
|
|
$this->logger->warning(
|
|
'Session "{session}": User ID matched but name didn\'t (rename?), {uname_a} !== {uname_b}',
|
|
[
|
|
'session' => $info->__toString(),
|
|
'uname_a' => $metadata['userName'],
|
|
'uname_b' => $userInfo->getName(),
|
|
] );
|
|
return $failHandler();
|
|
}
|
|
|
|
} elseif ( $metadata['userName'] !== null ) { // Shouldn't happen, but just in case
|
|
if ( $metadata['userName'] !== $userInfo->getName() ) {
|
|
$this->logger->warning(
|
|
'Session "{session}": User name mismatch, {uname_a} !== {uname_b}',
|
|
[
|
|
'session' => $info->__toString(),
|
|
'uname_a' => $metadata['userName'],
|
|
'uname_b' => $userInfo->getName(),
|
|
] );
|
|
return $failHandler();
|
|
}
|
|
} elseif ( !$userInfo->isAnon() ) {
|
|
// Metadata specifies an anonymous user, but the passed-in
|
|
// user isn't anonymous.
|
|
$this->logger->warning(
|
|
'Session "{session}": Metadata has an anonymous user, but a non-anon user was provided',
|
|
[
|
|
'session' => $info->__toString(),
|
|
] );
|
|
return $failHandler();
|
|
}
|
|
}
|
|
|
|
// And if we have a token in the metadata, it must match the loaded/provided user.
|
|
if ( $metadata['userToken'] !== null &&
|
|
$userInfo->getToken() !== $metadata['userToken']
|
|
) {
|
|
$this->logger->warning( 'Session "{session}": User token mismatch', [
|
|
'session' => $info->__toString(),
|
|
] );
|
|
return $failHandler();
|
|
}
|
|
if ( !$userInfo->isVerified() ) {
|
|
$newParams['userInfo'] = $userInfo->verified();
|
|
}
|
|
|
|
if ( !empty( $metadata['remember'] ) && !$info->wasRemembered() ) {
|
|
$newParams['remembered'] = true;
|
|
}
|
|
if ( !empty( $metadata['forceHTTPS'] ) && !$info->forceHTTPS() ) {
|
|
$newParams['forceHTTPS'] = true;
|
|
}
|
|
if ( !empty( $metadata['persisted'] ) && !$info->wasPersisted() ) {
|
|
$newParams['persisted'] = true;
|
|
}
|
|
|
|
if ( !$info->isIdSafe() ) {
|
|
$newParams['idIsSafe'] = true;
|
|
}
|
|
} else {
|
|
// No metadata, so we can't load the provider if one wasn't given.
|
|
if ( $info->getProvider() === null ) {
|
|
$this->logger->warning(
|
|
'Session "{session}": Null provider and no metadata',
|
|
[
|
|
'session' => $info->__toString(),
|
|
] );
|
|
return $failHandler();
|
|
}
|
|
|
|
// If no user was provided and no metadata, it must be anon.
|
|
if ( !$info->getUserInfo() ) {
|
|
if ( $info->getProvider()->canChangeUser() ) {
|
|
$newParams['userInfo'] = UserInfo::newAnonymous();
|
|
} else {
|
|
$this->logger->info(
|
|
'Session "{session}": No user provided and provider cannot set user',
|
|
[
|
|
'session' => $info->__toString(),
|
|
] );
|
|
return $failHandler();
|
|
}
|
|
} elseif ( !$info->getUserInfo()->isVerified() ) {
|
|
// probably just a session timeout
|
|
$this->logger->info(
|
|
'Session "{session}": Unverified user provided and no metadata to auth it',
|
|
[
|
|
'session' => $info->__toString(),
|
|
] );
|
|
return $failHandler();
|
|
}
|
|
|
|
$data = false;
|
|
$metadata = false;
|
|
|
|
if ( !$info->getProvider()->persistsSessionId() && !$info->isIdSafe() ) {
|
|
// The ID doesn't come from the user, so it should be safe
|
|
// (and if not, nothing we can do about it anyway)
|
|
$newParams['idIsSafe'] = true;
|
|
}
|
|
}
|
|
|
|
// Construct the replacement SessionInfo, if necessary
|
|
if ( $newParams ) {
|
|
$newParams['copyFrom'] = $info;
|
|
$info = new SessionInfo( $info->getPriority(), $newParams );
|
|
}
|
|
|
|
// Allow the provider to check the loaded SessionInfo
|
|
$providerMetadata = $info->getProviderMetadata();
|
|
if ( !$info->getProvider()->refreshSessionInfo( $info, $request, $providerMetadata ) ) {
|
|
return $failHandler();
|
|
}
|
|
if ( $providerMetadata !== $info->getProviderMetadata() ) {
|
|
$info = new SessionInfo( $info->getPriority(), [
|
|
'metadata' => $providerMetadata,
|
|
'copyFrom' => $info,
|
|
] );
|
|
}
|
|
|
|
// Give hooks a chance to abort. Combined with the SessionMetadata
|
|
// hook, this can allow for tying a session to an IP address or the
|
|
// like.
|
|
$reason = 'Hook aborted';
|
|
if ( !$this->hookRunner->onSessionCheckInfo(
|
|
$reason, $info, $request, $metadata, $data )
|
|
) {
|
|
$this->logger->warning( 'Session "{session}": ' . $reason, [
|
|
'session' => $info->__toString(),
|
|
] );
|
|
return $failHandler();
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* Create a Session corresponding to the passed SessionInfo
|
|
* @internal For use by a SessionProvider that needs to specially create its
|
|
* own Session. Most session providers won't need this.
|
|
* @param SessionInfo $info
|
|
* @param WebRequest $request
|
|
* @return Session
|
|
*/
|
|
public function getSessionFromInfo( SessionInfo $info, WebRequest $request ) {
|
|
// @codeCoverageIgnoreStart
|
|
if ( defined( 'MW_NO_SESSION' ) ) {
|
|
$ep = defined( 'MW_ENTRY_POINT' ) ? MW_ENTRY_POINT : 'this';
|
|
|
|
if ( MW_NO_SESSION === 'warn' ) {
|
|
// Undocumented safety case for converting existing entry points
|
|
$this->logger->error( 'Sessions are supposed to be disabled for this entry point', [
|
|
'exception' => new \BadMethodCallException( "Sessions are disabled for $ep entry point" ),
|
|
] );
|
|
} else {
|
|
throw new \BadMethodCallException( "Sessions are disabled for $ep entry point" );
|
|
}
|
|
}
|
|
// @codeCoverageIgnoreEnd
|
|
|
|
$id = $info->getId();
|
|
|
|
if ( !isset( $this->allSessionBackends[$id] ) ) {
|
|
if ( !isset( $this->allSessionIds[$id] ) ) {
|
|
$this->allSessionIds[$id] = new SessionId( $id );
|
|
}
|
|
$backend = new SessionBackend(
|
|
$this->allSessionIds[$id],
|
|
$info,
|
|
$this->store,
|
|
$this->logger,
|
|
$this->hookContainer,
|
|
$this->config->get( MainConfigNames::ObjectCacheSessionExpiry )
|
|
);
|
|
$this->allSessionBackends[$id] = $backend;
|
|
$delay = $backend->delaySave();
|
|
} else {
|
|
$backend = $this->allSessionBackends[$id];
|
|
$delay = $backend->delaySave();
|
|
if ( $info->wasPersisted() ) {
|
|
$backend->persist();
|
|
}
|
|
if ( $info->wasRemembered() ) {
|
|
$backend->setRememberUser( true );
|
|
}
|
|
}
|
|
|
|
$request->setSessionId( $backend->getSessionId() );
|
|
$session = $backend->getSession( $request );
|
|
|
|
if ( !$info->isIdSafe() ) {
|
|
$session->resetId();
|
|
}
|
|
|
|
\Wikimedia\ScopedCallback::consume( $delay );
|
|
return $session;
|
|
}
|
|
|
|
/**
|
|
* Deregister a SessionBackend
|
|
* @internal For use from \MediaWiki\Session\SessionBackend only
|
|
* @param SessionBackend $backend
|
|
*/
|
|
public function deregisterSessionBackend( SessionBackend $backend ) {
|
|
$id = $backend->getId();
|
|
if ( !isset( $this->allSessionBackends[$id] ) || !isset( $this->allSessionIds[$id] ) ||
|
|
$this->allSessionBackends[$id] !== $backend ||
|
|
$this->allSessionIds[$id] !== $backend->getSessionId()
|
|
) {
|
|
throw new \InvalidArgumentException( 'Backend was not registered with this SessionManager' );
|
|
}
|
|
|
|
unset( $this->allSessionBackends[$id] );
|
|
// Explicitly do not unset $this->allSessionIds[$id]
|
|
}
|
|
|
|
/**
|
|
* Change a SessionBackend's ID
|
|
* @internal For use from \MediaWiki\Session\SessionBackend only
|
|
* @param SessionBackend $backend
|
|
*/
|
|
public function changeBackendId( SessionBackend $backend ) {
|
|
$sessionId = $backend->getSessionId();
|
|
$oldId = (string)$sessionId;
|
|
if ( !isset( $this->allSessionBackends[$oldId] ) || !isset( $this->allSessionIds[$oldId] ) ||
|
|
$this->allSessionBackends[$oldId] !== $backend ||
|
|
$this->allSessionIds[$oldId] !== $sessionId
|
|
) {
|
|
throw new \InvalidArgumentException( 'Backend was not registered with this SessionManager' );
|
|
}
|
|
|
|
$newId = $this->generateSessionId();
|
|
|
|
unset( $this->allSessionBackends[$oldId], $this->allSessionIds[$oldId] );
|
|
$sessionId->setId( $newId );
|
|
$this->allSessionBackends[$newId] = $backend;
|
|
$this->allSessionIds[$newId] = $sessionId;
|
|
}
|
|
|
|
/**
|
|
* Generate a new random session ID
|
|
* @return string
|
|
*/
|
|
public function generateSessionId() {
|
|
$id = \Wikimedia\base_convert( \MWCryptRand::generateHex( 40 ), 16, 32, 32 );
|
|
// Cache non-existence to avoid a later fetch
|
|
$key = $this->store->makeKey( 'MWSession', $id );
|
|
$this->store->set( $key, false, 0, BagOStuff::WRITE_CACHE_ONLY );
|
|
return $id;
|
|
}
|
|
|
|
/**
|
|
* Call setters on a PHPSessionHandler
|
|
* @internal Use PhpSessionHandler::install()
|
|
* @param PHPSessionHandler $handler
|
|
*/
|
|
public function setupPHPSessionHandler( PHPSessionHandler $handler ) {
|
|
$handler->setManager( $this, $this->store, $this->logger );
|
|
}
|
|
|
|
/**
|
|
* Reset the internal caching for unit testing
|
|
* @note Unit tests only
|
|
* @internal
|
|
*/
|
|
public static function resetCache() {
|
|
if ( !defined( 'MW_PHPUNIT_TEST' ) && !defined( 'MW_PARSER_TEST' ) ) {
|
|
// @codeCoverageIgnoreStart
|
|
throw new MWException( __METHOD__ . ' may only be called from unit tests!' );
|
|
// @codeCoverageIgnoreEnd
|
|
}
|
|
|
|
self::$globalSession = null;
|
|
self::$globalSessionRequest = null;
|
|
}
|
|
|
|
private function logUnpersist( SessionInfo $info, WebRequest $request ) {
|
|
$logData = [
|
|
'id' => $info->getId(),
|
|
'provider' => get_class( $info->getProvider() ),
|
|
'user' => '<anon>',
|
|
'clientip' => $request->getIP(),
|
|
'userAgent' => $request->getHeader( 'user-agent' ),
|
|
];
|
|
if ( $info->getUserInfo() ) {
|
|
if ( !$info->getUserInfo()->isAnon() ) {
|
|
$logData['user'] = $info->getUserInfo()->getName();
|
|
}
|
|
$logData['userVerified'] = $info->getUserInfo()->isVerified();
|
|
}
|
|
$this->logger->info( 'Failed to load session, unpersisting', $logData );
|
|
}
|
|
|
|
/**
|
|
* If the same session is suddenly used from a different IP, that's potentially due
|
|
* to a session leak, so log it. In the vast majority of cases it is a false positive
|
|
* due to a user switching connections, but we are interested in an audit track where
|
|
* we can look up a specific username, so a noisy log is fine.
|
|
* Also log changes to the mwuser cookie, an analytics cookie set by mediawiki.user.js
|
|
* which should be a little less noisy.
|
|
* @private For use in Setup.php only
|
|
* @param Session|null $session For testing only
|
|
*/
|
|
public function logPotentialSessionLeakage( Session $session = null ) {
|
|
$proxyLookup = MediaWikiServices::getInstance()->getProxyLookup();
|
|
$session = $session ?: self::getGlobalSession();
|
|
$suspiciousIpExpiry = $this->config->get( MainConfigNames::SuspiciousIpExpiry );
|
|
|
|
if ( $suspiciousIpExpiry === false
|
|
// We only care about logged-in users.
|
|
|| !$session->isPersistent() || $session->getUser()->isAnon()
|
|
// We only care about cookie-based sessions.
|
|
|| !( $session->getProvider() instanceof CookieSessionProvider )
|
|
) {
|
|
return;
|
|
}
|
|
try {
|
|
$ip = $session->getRequest()->getIP();
|
|
} catch ( \MWException $e ) {
|
|
return;
|
|
}
|
|
if ( $ip === '127.0.0.1' || $proxyLookup->isConfiguredProxy( $ip ) ) {
|
|
return;
|
|
}
|
|
$mwuser = $session->getRequest()->getCookie( 'mwuser-sessionId' );
|
|
$now = (int)\MWTimestamp::now( TS_UNIX );
|
|
|
|
// Record (and possibly log) that the IP is using the current session.
|
|
// Don't touch the stored data unless we are changing the IP or re-adding an expired one.
|
|
// This is slightly inaccurate (when an existing IP is seen again, the expiry is not
|
|
// extended) but that shouldn't make much difference and limits the session write frequency.
|
|
$data = $session->get( 'SessionManager-logPotentialSessionLeakage', [] )
|
|
+ [ 'ip' => null, 'mwuser' => null, 'timestamp' => 0 ];
|
|
// Ignore old IP records; users change networks over time. mwuser is a session cookie and the
|
|
// SessionManager session id is also a session cookie so there shouldn't be any problem there.
|
|
if ( $data['ip'] &&
|
|
( $now - $data['timestamp'] > $suspiciousIpExpiry )
|
|
) {
|
|
$data['ip'] = $data['timestamp'] = null;
|
|
}
|
|
|
|
if ( $data['ip'] !== $ip || $data['mwuser'] !== $mwuser ) {
|
|
$session->set( 'SessionManager-logPotentialSessionLeakage',
|
|
[ 'ip' => $ip, 'mwuser' => $mwuser, 'timestamp' => $now ] );
|
|
}
|
|
|
|
$ipChanged = ( $data['ip'] && $data['ip'] !== $ip );
|
|
$mwuserChanged = ( $data['mwuser'] && $data['mwuser'] !== $mwuser );
|
|
$logLevel = $message = null;
|
|
$logData = [];
|
|
// IPs change all the time. mwuser is a session cookie that's only set when missing,
|
|
// so it should only change when the browser session ends which ends the SessionManager
|
|
// session as well. Unless we are dealing with a very weird client, such as a bot that
|
|
//manipulates cookies and can run Javascript, it should not change.
|
|
// IP and mwuser changing at the same time would be *very* suspicious.
|
|
if ( $ipChanged ) {
|
|
$logLevel = LogLevel::INFO;
|
|
$message = 'IP change within the same session';
|
|
$logData += [
|
|
'oldIp' => $data['ip'],
|
|
'oldIpRecorded' => $data['timestamp'],
|
|
];
|
|
}
|
|
if ( $mwuserChanged ) {
|
|
$logLevel = LogLevel::NOTICE;
|
|
$message = 'mwuser change within the same session';
|
|
$logData += [
|
|
'oldMwuser' => $data['mwuser'],
|
|
'newMwuser' => $mwuser,
|
|
];
|
|
}
|
|
if ( $ipChanged && $mwuserChanged ) {
|
|
$logLevel = LogLevel::WARNING;
|
|
$message = 'IP and mwuser change within the same session';
|
|
}
|
|
if ( $logLevel ) {
|
|
$logData += [
|
|
'session' => $session->getId(),
|
|
'user' => $session->getUser()->getName(),
|
|
'clientip' => $ip,
|
|
'userAgent' => $session->getRequest()->getHeader( 'user-agent' ),
|
|
];
|
|
$logger = \MediaWiki\Logger\LoggerFactory::getInstance( 'session-ip' );
|
|
// @phan-suppress-next-line PhanTypeMismatchArgumentNullable message is set when used here
|
|
$logger->log( $logLevel, $message, $logData );
|
|
}
|
|
}
|
|
|
|
// endregion -- end of Internal methods
|
|
|
|
}
|