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1<?php
2
3namespace MediaWiki\Specials;
4
5use MediaWiki\Auth\AuthenticationResponse;
6use MediaWiki\Auth\AuthManager;
7use MediaWiki\Exception\ErrorPageError;
8use MediaWiki\MainConfigNames;
9use MediaWiki\Session\SessionManager;
10use MediaWiki\SpecialPage\AuthManagerSpecialPage;
11use MediaWiki\Status\Status;
12use StatusValue;
13
14/**
15 * @ingroup SpecialPage
16 * @ingroup Auth
17 */
18class SpecialUnlinkAccounts extends AuthManagerSpecialPage {
19    /** @inheritDoc */
20    protected static $allowedActions = [ AuthManager::ACTION_UNLINK ];
21
22    public function __construct( AuthManager $authManager ) {
23        parent::__construct( 'UnlinkAccounts' );
24        $this->setAuthManager( $authManager );
25    }
26
27    protected function getLoginSecurityLevel() {
28        return 'UnlinkAccount';
29    }
30
31    protected function getDefaultAction( $subPage ) {
32        return AuthManager::ACTION_UNLINK;
33    }
34
35    /**
36     * Under which header this special page is listed in Special:SpecialPages.
37     * @return string
38     */
39    protected function getGroupName() {
40        return 'login';
41    }
42
43    public function isListed() {
44        return $this->getAuthManager()->canLinkAccounts();
45    }
46
47    protected function getRequestBlacklist() {
48        return $this->getConfig()->get( MainConfigNames::RemoveCredentialsBlacklist );
49    }
50
51    public function execute( $subPage ) {
52        $this->setHeaders();
53        $this->loadAuth( $subPage );
54
55        if ( !$this->isActionAllowed( $this->authAction ) ) {
56            if ( $this->authAction === AuthManager::ACTION_UNLINK ) {
57                // Looks like there are no linked accounts to unlink
58                $titleMessage = $this->msg( 'cannotunlink-no-provider-title' );
59                $errorMessage = $this->msg( 'cannotunlink-no-provider' );
60                throw new ErrorPageError( $titleMessage, $errorMessage );
61            } else {
62                // user probably back-button-navigated into an auth session that no longer exists
63                // FIXME would be nice to show a message
64                $this->getOutput()->redirect( $this->getPageTitle()->getFullURL( '', false, PROTO_HTTPS ) );
65                return;
66            }
67        }
68
69        $this->outputHeader();
70
71        $status = $this->trySubmit();
72
73        if ( $status === false || !$status->isOK() ) {
74            $this->displayForm( $status );
75            return;
76        }
77
78        /** @var AuthenticationResponse $response */
79        $response = $status->getValue();
80
81        if ( $response->status === AuthenticationResponse::FAIL ) {
82            $this->displayForm( StatusValue::newFatal( $response->message ) );
83            return;
84        }
85
86        $status = StatusValue::newGood();
87        $status->warning( $this->msg( 'unlinkaccounts-success' ) );
88        $this->loadAuth( $subPage, null, true ); // update requests so the unlinked one doesn't show up
89
90        // Reset sessions - if the user unlinked an account because it was compromised,
91        // log attackers out from sessions obtained via that account.
92        $session = $this->getRequest()->getSession();
93        $user = $this->getUser();
94        SessionManager::singleton()->invalidateSessionsForUser( $user );
95        $session->setUser( $user );
96        $session->resetId();
97
98        $this->displayForm( $status );
99    }
100
101    public function handleFormSubmit( $data ) {
102        // unlink requests do not accept user input so repeat parent code but skip call to
103        // AuthenticationRequest::loadRequestsFromSubmission
104        $response = $this->performAuthenticationStep( $this->authAction, $this->authRequests );
105        return Status::newGood( $response );
106    }
107}
108
109/**
110 * Retain the old class name for backwards compatibility.
111 * @deprecated since 1.41
112 */
113class_alias( SpecialUnlinkAccounts::class, 'SpecialUnlinkAccounts' );