Fix missing commit() flag in postgres savepoint class

[mediawiki.git] / includes / api / ApiLogin.php

<?php
/**
 *
 *
 * Created on Sep 19, 2006
 *
 * Copyright © 2006-2007 Yuri Astrakhan "<Firstname><Lastname>@gmail.com",
 * Daniel Cannon (cannon dot danielc at gmail dot com)
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License along
 * with this program; if not, write to the Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 * http://www.gnu.org/copyleft/gpl.html
 *
 * @file
 */

use MediaWiki\Auth\AuthManager;
use MediaWiki\Auth\AuthenticationRequest;
use MediaWiki\Auth\AuthenticationResponse;
use MediaWiki\Logger\LoggerFactory;

/**
 * Unit to authenticate log-in attempts to the current wiki.
 *
 * @ingroup API
 */
class ApiLogin extends ApiBase {

        public function __construct( ApiMain $main, $action ) {
                parent::__construct( $main, $action, 'lg' );
        }

        protected function getDescriptionMessage() {
                if ( $this->getConfig()->get( 'EnableBotPasswords' ) ) {
                        return 'apihelp-login-description';
                } else {
                        return 'apihelp-login-description-nobotpasswords';
                }
        }

        /**
         * Executes the log-in attempt using the parameters passed. If
         * the log-in succeeds, it attaches a cookie to the session
         * and outputs the user id, username, and session token. If a
         * log-in fails, as the result of a bad password, a nonexistent
         * user, or any other reason, the host is cached with an expiry
         * and no log-in attempts will be accepted until that expiry
         * is reached. The expiry is $this->mLoginThrottle.
         */
        public function execute() {
                // If we're in a mode that breaks the same-origin policy, no tokens can
                // be obtained
                if ( $this->lacksSameOriginSecurity() ) {
                        $this->getResult()->addValue( null, 'login', [
                                'result' => 'Aborted',
                                'reason' => 'Cannot log in when the same-origin policy is not applied',
                        ] );

                        return;
                }

                try {
                        $this->requirePostedParameters( [ 'password', 'token' ] );
                } catch ( UsageException $ex ) {
                        // Make this a warning for now, upgrade to an error in 1.29.
                        $this->setWarning( $ex->getMessage() );
                        $this->logFeatureUsage( 'login-params-in-query-string' );
                }

                $params = $this->extractRequestParams();

                $result = [];

                // Make sure session is persisted
                $session = MediaWiki\Session\SessionManager::getGlobalSession();
                $session->persist();

                // Make sure it's possible to log in
                if ( !$session->canSetUser() ) {
                        $this->getResult()->addValue( null, 'login', [
                                'result' => 'Aborted',
                                'reason' => 'Cannot log in when using ' .
                                        $session->getProvider()->describe( Language::factory( 'en' ) ),
                        ] );

                        return;
                }

                $authRes = false;
                $context = new DerivativeContext( $this->getContext() );
                $loginType = 'N/A';

                // Check login token
                $token = $session->getToken( '', 'login' );
                if ( $token->wasNew() || !$params['token'] ) {
                        $authRes = 'NeedToken';
                } elseif ( !$token->match( $params['token'] ) ) {
                        $authRes = 'WrongToken';
                }

                // Try bot passwords
                if (
                        $authRes === false && $this->getConfig()->get( 'EnableBotPasswords' ) &&
                        ( $botLoginData = BotPassword::canonicalizeLoginData( $params['name'], $params['password'] ) )
                ) {
                        $status = BotPassword::login(
                                $botLoginData[0], $botLoginData[1], $this->getRequest()
                        );
                        if ( $status->isOK() ) {
                                $session = $status->getValue();
                                $authRes = 'Success';
                                $loginType = 'BotPassword';
                        } elseif ( !$botLoginData[2] ) {
                                $authRes = 'Failed';
                                $message = $status->getMessage();
                                LoggerFactory::getInstance( 'authentication' )->info(
                                        'BotPassword login failed: ' . $status->getWikiText( false, false, 'en' )
                                );
                        }
                }

                if ( $authRes === false ) {
                        // Simplified AuthManager login, for backwards compatibility
                        $manager = AuthManager::singleton();
                        $reqs = AuthenticationRequest::loadRequestsFromSubmission(
                                $manager->getAuthenticationRequests( AuthManager::ACTION_LOGIN, $this->getUser() ),
                                [
                                        'username' => $params['name'],
                                        'password' => $params['password'],
                                        'domain' => $params['domain'],
                                        'rememberMe' => true,
                                ]
                        );
                        $res = AuthManager::singleton()->beginAuthentication( $reqs, 'null:' );
                        switch ( $res->status ) {
                                case AuthenticationResponse::PASS:
                                        if ( $this->getConfig()->get( 'EnableBotPasswords' ) ) {
                                                $warn = 'Main-account login via action=login is deprecated and may stop working ' .
                                                        'without warning.';
                                                $warn .= ' To continue login with action=login, see [[Special:BotPasswords]].';
                                                $warn .= ' To safely continue using main-account login, see action=clientlogin.';
                                        } else {
                                                $warn = 'Login via action=login is deprecated and may stop working without warning.';
                                                $warn .= ' To safely log in, see action=clientlogin.';
                                        }
                                        $this->setWarning( $warn );
                                        $authRes = 'Success';
                                        $loginType = 'AuthManager';
                                        break;

                                case AuthenticationResponse::FAIL:
                                        // Hope it's not a PreAuthenticationProvider that failed...
                                        $authRes = 'Failed';
                                        $message = $res->message;
                                        \MediaWiki\Logger\LoggerFactory::getInstance( 'authentication' )
                                                ->info( __METHOD__ . ': Authentication failed: '
                                                . $message->inLanguage( 'en' )->plain() );
                                        break;

                                default:
                                        \MediaWiki\Logger\LoggerFactory::getInstance( 'authentication' )
                                                ->info( __METHOD__ . ': Authentication failed due to unsupported response type: '
                                                . $res->status, $this->getAuthenticationResponseLogData( $res ) );
                                        $authRes = 'Aborted';
                                        break;
                        }
                }

                $result['result'] = $authRes;
                switch ( $authRes ) {
                        case 'Success':
                                $user = $session->getUser();

                                ApiQueryInfo::resetTokenCache();

                                // Deprecated hook
                                $injected_html = '';
                                Hooks::run( 'UserLoginComplete', [ &$user, &$injected_html, true ] );

                                $result['lguserid'] = intval( $user->getId() );
                                $result['lgusername'] = $user->getName();
                                break;

                        case 'NeedToken':
                                $result['token'] = $token->toString();
                                $this->setWarning( 'Fetching a token via action=login is deprecated. ' .
                                   'Use action=query&meta=tokens&type=login instead.' );
                                $this->logFeatureUsage( 'action=login&!lgtoken' );
                                break;

                        case 'WrongToken':
                                break;

                        case 'Failed':
                                $result['reason'] = $message->useDatabase( 'false' )->inLanguage( 'en' )->text();
                                break;

                        case 'Aborted':
                                $result['reason'] = 'Authentication requires user interaction, ' .
                                   'which is not supported by action=login.';
                                if ( $this->getConfig()->get( 'EnableBotPasswords' ) ) {
                                        $result['reason'] .= ' To be able to login with action=login, see [[Special:BotPasswords]].';
                                        $result['reason'] .= ' To continue using main-account login, see action=clientlogin.';
                                } else {
                                        $result['reason'] .= ' To log in, see action=clientlogin.';
                                }
                                break;

                        default:
                                ApiBase::dieDebug( __METHOD__, "Unhandled case value: {$authRes}" );
                }

                $this->getResult()->addValue( null, 'login', $result );

                if ( $loginType === 'LoginForm' && isset( LoginForm::$statusCodes[$authRes] ) ) {
                        $authRes = LoginForm::$statusCodes[$authRes];
                }
                LoggerFactory::getInstance( 'authevents' )->info( 'Login attempt', [
                        'event' => 'login',
                        'successful' => $authRes === 'Success',
                        'loginType' => $loginType,
                        'status' => $authRes,
                ] );
        }

        public function isDeprecated() {
                return !$this->getConfig()->get( 'EnableBotPasswords' );
        }

        public function mustBePosted() {
                return true;
        }

        public function isReadMode() {
                return false;
        }

        public function getAllowedParams() {
                return [
                        'name' => null,
                        'password' => [
                                ApiBase::PARAM_TYPE => 'password',
                        ],
                        'domain' => null,
                        'token' => [
                                ApiBase::PARAM_TYPE => 'string',
                                ApiBase::PARAM_REQUIRED => false, // for BC
                                ApiBase::PARAM_HELP_MSG => [ 'api-help-param-token', 'login' ],
                        ],
                ];
        }

        protected function getExamplesMessages() {
                return [
                        'action=login&lgname=user&lgpassword=password'
                                => 'apihelp-login-example-gettoken',
                        'action=login&lgname=user&lgpassword=password&lgtoken=123ABC'
                                => 'apihelp-login-example-login',
                ];
        }

        public function getHelpUrls() {
                return 'https://www.mediawiki.org/wiki/API:Login';
        }

        /**
         * Turns an AuthenticationResponse into a hash suitable for passing to Logger
         * @param AuthenticationResponse $response
         * @return array
         */
        protected function getAuthenticationResponseLogData( AuthenticationResponse $response ) {
                $ret = [
                        'status' => $response->status,
                ];
                if ( $response->message ) {
                        $ret['message'] = $response->message->inLanguage( 'en' )->plain();
                };
                $reqs = [
                        'neededRequests' => $response->neededRequests,
                        'createRequest' => $response->createRequest,
                        'linkRequest' => $response->linkRequest,
                ];
                foreach ( $reqs as $k => $v ) {
                        if ( $v ) {
                                $v = is_array( $v ) ? $v : [ $v ];
                                $reqClasses = array_unique( array_map( 'get_class', $v ) );
                                sort( $reqClasses );
                                $ret[$k] = implode( ', ', $reqClasses );
                        }
                }
                return $ret;
        }
}