AuthManager.php

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<?php
namespace MediaWiki\Auth;
 
use IDBAccessObject;
use InvalidArgumentException;
use Language;
use MediaWiki\Block\BlockManager;
use MediaWiki\Config\Config;
use MediaWiki\Context\RequestContext;
use MediaWiki\Deferred\DeferredUpdates;
use MediaWiki\Deferred\SiteStatsUpdate;
use MediaWiki\HookContainer\HookContainer;
use MediaWiki\HookContainer\HookRunner;
use MediaWiki\Languages\LanguageConverterFactory;
use MediaWiki\MainConfigNames;
use MediaWiki\MediaWikiServices;
use MediaWiki\Page\PageIdentity;
use MediaWiki\Permissions\Authority;
use MediaWiki\Permissions\PermissionStatus;
use MediaWiki\Request\WebRequest;
use MediaWiki\SpecialPage\SpecialPage;
use MediaWiki\Status\Status;
use MediaWiki\StubObject\StubGlobalUser;
use MediaWiki\User\BotPasswordStore;
use MediaWiki\User\Options\UserOptionsManager;
use MediaWiki\User\TempUser\TempUserCreator;
use MediaWiki\User\User;
use MediaWiki\User\UserFactory;
use MediaWiki\User\UserIdentity;
use MediaWiki\User\UserIdentityLookup;
use MediaWiki\User\UserNameUtils;
use MediaWiki\User\UserRigorOptions;
use MediaWiki\Watchlist\WatchlistManager;
use Psr\Log\LoggerAwareInterface;
use Psr\Log\LoggerInterface;
use Psr\Log\NullLogger;
use StatusValue;
use Wikimedia\ObjectFactory\ObjectFactory;
use Wikimedia\Rdbms\ILoadBalancer;
use Wikimedia\Rdbms\ReadOnlyMode;
use Wikimedia\ScopedCallback;
 
class AuthManager implements LoggerAwareInterface {
    public const AUTHN_STATE = 'AuthManager::authnState';
 
    public const ACCOUNT_CREATION_STATE = 'AuthManager::accountCreationState';
 
    public const ACCOUNT_LINK_STATE = 'AuthManager::accountLinkState';
 
    public const AUTOCREATE_BLOCKLIST = 'AuthManager::AutoCreateBlacklist';
 
    public const ACTION_LOGIN = 'login';
    public const ACTION_LOGIN_CONTINUE = 'login-continue';
    public const ACTION_CREATE = 'create';
    public const ACTION_CREATE_CONTINUE = 'create-continue';
    public const ACTION_LINK = 'link';
    public const ACTION_LINK_CONTINUE = 'link-continue';
    public const ACTION_CHANGE = 'change';
    public const ACTION_REMOVE = 'remove';
    public const ACTION_UNLINK = 'unlink';
 
    public const SEC_OK = 'ok';
    public const SEC_REAUTH = 'reauth';
    public const SEC_FAIL = 'fail';
 
    public const AUTOCREATE_SOURCE_SESSION = \MediaWiki\Session\SessionManager::class;
 
    public const AUTOCREATE_SOURCE_MAINT = '::Maintenance::';
 
    public const AUTOCREATE_SOURCE_TEMP = TempUserCreator::class;
 
    private $request;
 
    private $config;
 
    private $objectFactory;
 
    private $logger;
 
    private $userNameUtils;
 
    private $allAuthenticationProviders = [];
 
    private $preAuthenticationProviders = null;
 
    private $primaryAuthenticationProviders = null;
 
    private $secondaryAuthenticationProviders = null;
 
    private $createdAccountAuthenticationRequests = [];
 
    private $hookContainer;
 
    private $hookRunner;
 
    private $readOnlyMode;
 
    private $blockManager;
 
    private $watchlistManager;
 
    private $loadBalancer;
 
    private $contentLanguage;
 
    private $languageConverterFactory;
 
    private $botPasswordStore;
 
    private $userFactory;
 
    private $userIdentityLookup;
 
    private $userOptionsManager;
 
    public function __construct(
        WebRequest $request,
        Config $config,
        ObjectFactory $objectFactory,
        HookContainer $hookContainer,
        ReadOnlyMode $readOnlyMode,
        UserNameUtils $userNameUtils,
        BlockManager $blockManager,
        WatchlistManager $watchlistManager,
        ILoadBalancer $loadBalancer,
        Language $contentLanguage,
        LanguageConverterFactory $languageConverterFactory,
        BotPasswordStore $botPasswordStore,
        UserFactory $userFactory,
        UserIdentityLookup $userIdentityLookup,
        UserOptionsManager $userOptionsManager
    ) {
        $this->request = $request;
        $this->config = $config;
        $this->objectFactory = $objectFactory;
        $this->hookContainer = $hookContainer;
        $this->hookRunner = new HookRunner( $hookContainer );
        $this->setLogger( new NullLogger() );
        $this->readOnlyMode = $readOnlyMode;
        $this->userNameUtils = $userNameUtils;
        $this->blockManager = $blockManager;
        $this->watchlistManager = $watchlistManager;
        $this->loadBalancer = $loadBalancer;
        $this->contentLanguage = $contentLanguage;
        $this->languageConverterFactory = $languageConverterFactory;
        $this->botPasswordStore = $botPasswordStore;
        $this->userFactory = $userFactory;
        $this->userIdentityLookup = $userIdentityLookup;
        $this->userOptionsManager = $userOptionsManager;
    }
 
    public function setLogger( LoggerInterface $logger ) {
        $this->logger = $logger;
    }
 
    public function getRequest() {
        return $this->request;
    }
 
    public function forcePrimaryAuthenticationProviders( array $providers, $why ) {
        wfDeprecated( __METHOD__, '1.43' );
 
        $this->logger->warning( "Overriding AuthManager primary authn because $why" );
 
        if ( $this->primaryAuthenticationProviders !== null ) {
            $this->logger->warning(
                'PrimaryAuthenticationProviders have already been accessed! I hope nothing breaks.'
            );
 
            $this->allAuthenticationProviders = array_diff_key(
                $this->allAuthenticationProviders,
                $this->primaryAuthenticationProviders
            );
            $session = $this->request->getSession();
            $session->remove( self::AUTHN_STATE );
            $session->remove( self::ACCOUNT_CREATION_STATE );
            $session->remove( self::ACCOUNT_LINK_STATE );
            $this->createdAccountAuthenticationRequests = [];
        }
 
        $this->primaryAuthenticationProviders = [];
        foreach ( $providers as $provider ) {
            if ( !$provider instanceof AbstractPrimaryAuthenticationProvider ) {
                throw new \RuntimeException(
                    'Expected instance of MediaWiki\\Auth\\AbstractPrimaryAuthenticationProvider, got ' .
                        get_class( $provider )
                );
            }
            $provider->init( $this->logger, $this, $this->hookContainer, $this->config, $this->userNameUtils );
            $id = $provider->getUniqueId();
            if ( isset( $this->allAuthenticationProviders[$id] ) ) {
                throw new \RuntimeException(
                    "Duplicate specifications for id $id (classes " .
                        get_class( $provider ) . ' and ' .
                        get_class( $this->allAuthenticationProviders[$id] ) . ')'
                );
            }
            $this->allAuthenticationProviders[$id] = $provider;
            $this->primaryAuthenticationProviders[$id] = $provider;
        }
    }
 
    /***************************************************************************/
    // region   Authentication
    public function canAuthenticateNow() {
        return $this->request->getSession()->canSetUser();
    }
 
    public function beginAuthentication( array $reqs, $returnToUrl ) {
        $session = $this->request->getSession();
        if ( !$session->canSetUser() ) {
            // Caller should have called canAuthenticateNow()
            $session->remove( self::AUTHN_STATE );
            throw new \LogicException( 'Authentication is not possible now' );
        }
 
        $guessUserName = null;
        foreach ( $reqs as $req ) {
            $req->returnToUrl = $returnToUrl;
            // @codeCoverageIgnoreStart
            if ( $req->username !== null && $req->username !== '' ) {
                if ( $guessUserName === null ) {
                    $guessUserName = $req->username;
                } elseif ( $guessUserName !== $req->username ) {
                    $guessUserName = null;
                    break;
                }
            }
            // @codeCoverageIgnoreEnd
        }
 
        // Check for special-case login of a just-created account
        $req = AuthenticationRequest::getRequestByClass(
            $reqs, CreatedAccountAuthenticationRequest::class
        );
        if ( $req ) {
            if ( !in_array( $req, $this->createdAccountAuthenticationRequests, true ) ) {
                throw new \LogicException(
                    'CreatedAccountAuthenticationRequests are only valid on ' .
                        'the same AuthManager that created the account'
                );
            }
 
            $user = $this->userFactory->newFromName( (string)$req->username );
            // @codeCoverageIgnoreStart
            if ( !$user ) {
                throw new \UnexpectedValueException(
                    "CreatedAccountAuthenticationRequest had invalid username \"{$req->username}\""
                );
            } elseif ( $user->getId() != $req->id ) {
                throw new \UnexpectedValueException(
                    "ID for \"{$req->username}\" was {$user->getId()}, expected {$req->id}"
                );
            }
            // @codeCoverageIgnoreEnd
 
            $this->logger->info( 'Logging in {user} after account creation', [
                'user' => $user->getName(),
            ] );
            $ret = AuthenticationResponse::newPass( $user->getName() );
            $performer = $session->getUser();
            $this->setSessionDataForUser( $user );
            $this->callMethodOnProviders( 7, 'postAuthentication', [ $user, $ret ] );
            $session->remove( self::AUTHN_STATE );
            $this->getHookRunner()->onAuthManagerLoginAuthenticateAudit(
                $ret, $user, $user->getName(), [
                    'performer' => $performer
                ] );
            return $ret;
        }
 
        $this->removeAuthenticationSessionData( null );
 
        foreach ( $this->getPreAuthenticationProviders() as $provider ) {
            $status = $provider->testForAuthentication( $reqs );
            if ( !$status->isGood() ) {
                $this->logger->debug( 'Login failed in pre-authentication by ' . $provider->getUniqueId() );
                $ret = AuthenticationResponse::newFail(
                    Status::wrap( $status )->getMessage()
                );
                $this->callMethodOnProviders( 7, 'postAuthentication',
                    [ $this->userFactory->newFromName( (string)$guessUserName ), $ret ]
                );
                $this->getHookRunner()->onAuthManagerLoginAuthenticateAudit( $ret, null, $guessUserName, [
                    'performer' => $session->getUser()
                ] );
                return $ret;
            }
        }
 
        $state = [
            'reqs' => $reqs,
            'returnToUrl' => $returnToUrl,
            'guessUserName' => $guessUserName,
            'primary' => null,
            'primaryResponse' => null,
            'secondary' => [],
            'maybeLink' => [],
            'continueRequests' => [],
        ];
 
        // Preserve state from a previous failed login
        $req = AuthenticationRequest::getRequestByClass(
            $reqs, CreateFromLoginAuthenticationRequest::class
        );
        if ( $req ) {
            $state['maybeLink'] = $req->maybeLink;
        }
 
        $session = $this->request->getSession();
        $session->setSecret( self::AUTHN_STATE, $state );
        $session->persist();
 
        return $this->continueAuthentication( $reqs );
    }
 
    public function continueAuthentication( array $reqs ) {
        $session = $this->request->getSession();
        try {
            if ( !$session->canSetUser() ) {
                // Caller should have called canAuthenticateNow()
                // @codeCoverageIgnoreStart
                throw new \LogicException( 'Authentication is not possible now' );
                // @codeCoverageIgnoreEnd
            }
 
            $state = $session->getSecret( self::AUTHN_STATE );
            if ( !is_array( $state ) ) {
                return AuthenticationResponse::newFail(
                    wfMessage( 'authmanager-authn-not-in-progress' )
                );
            }
            $state['continueRequests'] = [];
 
            $guessUserName = $state['guessUserName'];
 
            foreach ( $reqs as $req ) {
                $req->returnToUrl = $state['returnToUrl'];
            }
 
            // Step 1: Choose a primary authentication provider, and call it until it succeeds.
 
            if ( $state['primary'] === null ) {
                // We haven't picked a PrimaryAuthenticationProvider yet
                // @codeCoverageIgnoreStart
                $guessUserName = null;
                foreach ( $reqs as $req ) {
                    if ( $req->username !== null && $req->username !== '' ) {
                        if ( $guessUserName === null ) {
                            $guessUserName = $req->username;
                        } elseif ( $guessUserName !== $req->username ) {
                            $guessUserName = null;
                            break;
                        }
                    }
                }
                $state['guessUserName'] = $guessUserName;
                // @codeCoverageIgnoreEnd
                $state['reqs'] = $reqs;
 
                foreach ( $this->getPrimaryAuthenticationProviders() as $id => $provider ) {
                    $res = $provider->beginPrimaryAuthentication( $reqs );
                    switch ( $res->status ) {
                        case AuthenticationResponse::PASS:
                            $state['primary'] = $id;
                            $state['primaryResponse'] = $res;
                            $this->logger->debug( "Primary login with $id succeeded" );
                            break 2;
                        case AuthenticationResponse::FAIL:
                            $this->logger->debug( "Login failed in primary authentication by $id" );
                            if ( $res->createRequest || $state['maybeLink'] ) {
                                $res->createRequest = new CreateFromLoginAuthenticationRequest(
                                    $res->createRequest, $state['maybeLink']
                                );
                            }
                            $this->callMethodOnProviders(
                                7,
                                'postAuthentication',
                                [
                                    $this->userFactory->newFromName( (string)$guessUserName ),
                                    $res
                                ]
                            );
                            $session->remove( self::AUTHN_STATE );
                            $this->getHookRunner()->onAuthManagerLoginAuthenticateAudit(
                                $res, null, $guessUserName, [
                                    'performer' => $session->getUser()
                                ] );
                            return $res;
                        case AuthenticationResponse::ABSTAIN:
                            // Continue loop
                            break;
                        case AuthenticationResponse::REDIRECT:
                        case AuthenticationResponse::UI:
                            $this->logger->debug( "Primary login with $id returned $res->status" );
                            $this->fillRequests( $res->neededRequests, self::ACTION_LOGIN, $guessUserName );
                            $state['primary'] = $id;
                            $state['continueRequests'] = $res->neededRequests;
                            $session->setSecret( self::AUTHN_STATE, $state );
                            return $res;
 
                            // @codeCoverageIgnoreStart
                        default:
                            throw new \DomainException(
                                get_class( $provider ) . "::beginPrimaryAuthentication() returned $res->status"
                            );
                            // @codeCoverageIgnoreEnd
                    }
                }
                // @phan-suppress-next-line PhanTypePossiblyInvalidDimOffset Always set in loop before, if passed
                if ( $state['primary'] === null ) {
                    $this->logger->debug( 'Login failed in primary authentication because no provider accepted' );
                    $ret = AuthenticationResponse::newFail(
                        wfMessage( 'authmanager-authn-no-primary' )
                    );
                    $this->callMethodOnProviders( 7, 'postAuthentication',
                        [ $this->userFactory->newFromName( (string)$guessUserName ), $ret ]
                    );
                    $session->remove( self::AUTHN_STATE );
                    return $ret;
                }
            } elseif ( $state['primaryResponse'] === null ) {
                $provider = $this->getAuthenticationProvider( $state['primary'] );
                if ( !$provider instanceof PrimaryAuthenticationProvider ) {
                    // Configuration changed? Force them to start over.
                    // @codeCoverageIgnoreStart
                    $ret = AuthenticationResponse::newFail(
                        wfMessage( 'authmanager-authn-not-in-progress' )
                    );
                    $this->callMethodOnProviders( 7, 'postAuthentication',
                        [ $this->userFactory->newFromName( (string)$guessUserName ), $ret ]
                    );
                    $session->remove( self::AUTHN_STATE );
                    return $ret;
                    // @codeCoverageIgnoreEnd
                }
                $id = $provider->getUniqueId();
                $res = $provider->continuePrimaryAuthentication( $reqs );
                switch ( $res->status ) {
                    case AuthenticationResponse::PASS:
                        $state['primaryResponse'] = $res;
                        $this->logger->debug( "Primary login with $id succeeded" );
                        break;
                    case AuthenticationResponse::FAIL:
                        $this->logger->debug( "Login failed in primary authentication by $id" );
                        if ( $res->createRequest || $state['maybeLink'] ) {
                            $res->createRequest = new CreateFromLoginAuthenticationRequest(
                                $res->createRequest, $state['maybeLink']
                            );
                        }
                        $this->callMethodOnProviders( 7, 'postAuthentication',
                            [ $this->userFactory->newFromName( (string)$guessUserName ), $res ]
                        );
                        $session->remove( self::AUTHN_STATE );
                        $this->getHookRunner()->onAuthManagerLoginAuthenticateAudit(
                            $res, null, $guessUserName, [
                                'performer' => $session->getUser()
                            ] );
                        return $res;
                    case AuthenticationResponse::REDIRECT:
                    case AuthenticationResponse::UI:
                        $this->logger->debug( "Primary login with $id returned $res->status" );
                        $this->fillRequests( $res->neededRequests, self::ACTION_LOGIN, $guessUserName );
                        $state['continueRequests'] = $res->neededRequests;
                        $session->setSecret( self::AUTHN_STATE, $state );
                        return $res;
                    default:
                        throw new \DomainException(
                            get_class( $provider ) . "::continuePrimaryAuthentication() returned $res->status"
                        );
                }
            }
 
            // @phan-suppress-next-line PhanTypePossiblyInvalidDimOffset Always set in loop before, if passed
            $res = $state['primaryResponse'];
            if ( $res->username === null ) {
                $provider = $this->getAuthenticationProvider( $state['primary'] );
                if ( !$provider instanceof PrimaryAuthenticationProvider ) {
                    // Configuration changed? Force them to start over.
                    // @codeCoverageIgnoreStart
                    $ret = AuthenticationResponse::newFail(
                        wfMessage( 'authmanager-authn-not-in-progress' )
                    );
                    $this->callMethodOnProviders( 7, 'postAuthentication',
                        [ $this->userFactory->newFromName( (string)$guessUserName ), $ret ]
                    );
                    $session->remove( self::AUTHN_STATE );
                    return $ret;
                    // @codeCoverageIgnoreEnd
                }
 
                if ( $provider->accountCreationType() === PrimaryAuthenticationProvider::TYPE_LINK &&
                    $res->linkRequest &&
                    // don't confuse the user with an incorrect message if linking is disabled
                    $this->getAuthenticationProvider( ConfirmLinkSecondaryAuthenticationProvider::class )
                ) {
                    $state['maybeLink'][$res->linkRequest->getUniqueId()] = $res->linkRequest;
                    $msg = 'authmanager-authn-no-local-user-link';
                } else {
                    $msg = 'authmanager-authn-no-local-user';
                }
                $this->logger->debug(
                    "Primary login with {$provider->getUniqueId()} succeeded, but returned no user"
                );
                $ret = AuthenticationResponse::newRestart( wfMessage( $msg ) );
                $ret->neededRequests = $this->getAuthenticationRequestsInternal(
                    self::ACTION_LOGIN,
                    [],
                    $this->getPrimaryAuthenticationProviders() + $this->getSecondaryAuthenticationProviders()
                );
                if ( $res->createRequest || $state['maybeLink'] ) {
                    $ret->createRequest = new CreateFromLoginAuthenticationRequest(
                        $res->createRequest, $state['maybeLink']
                    );
                    $ret->neededRequests[] = $ret->createRequest;
                }
                $this->fillRequests( $ret->neededRequests, self::ACTION_LOGIN, null, true );
                $session->setSecret( self::AUTHN_STATE, [
                    'reqs' => [], // Will be filled in later
                    'primary' => null,
                    'primaryResponse' => null,
                    'secondary' => [],
                    'continueRequests' => $ret->neededRequests,
                ] + $state );
                return $ret;
            }
 
            // Step 2: Primary authentication succeeded, create the User object
            // (and add the user locally if necessary)
 
            $user = $this->userFactory->newFromName(
                (string)$res->username,
                UserRigorOptions::RIGOR_USABLE
            );
            if ( !$user ) {
                $provider = $this->getAuthenticationProvider( $state['primary'] );
                throw new \DomainException(
                    get_class( $provider ) . " returned an invalid username: {$res->username}"
                );
            }
            if ( !$user->isRegistered() ) {
                // User doesn't exist locally. Create it.
                $this->logger->info( 'Auto-creating {user} on login', [
                    'user' => $user->getName(),
                ] );
                // Also use $user as performer, because the performer will be used for permission
                // checks and global rights extensions might add rights based on the username,
                // even if the user doesn't exist at this point.
                $status = $this->autoCreateUser( $user, $state['primary'], false, true, $user );
                if ( !$status->isGood() ) {
                    $ret = AuthenticationResponse::newFail(
                        Status::wrap( $status )->getMessage( 'authmanager-authn-autocreate-failed' )
                    );
                    $this->callMethodOnProviders( 7, 'postAuthentication', [ $user, $ret ] );
                    $session->remove( self::AUTHN_STATE );
                    $this->getHookRunner()->onAuthManagerLoginAuthenticateAudit(
                        $ret, $user, $user->getName(), [
                            'performer' => $session->getUser()
                        ] );
                    return $ret;
                }
            }
 
            // Step 3: Iterate over all the secondary authentication providers.
 
            $beginReqs = $state['reqs'];
 
            foreach ( $this->getSecondaryAuthenticationProviders() as $id => $provider ) {
                if ( !isset( $state['secondary'][$id] ) ) {
                    // This provider isn't started yet, so we pass it the set
                    // of reqs from beginAuthentication instead of whatever
                    // might have been used by a previous provider in line.
                    $func = 'beginSecondaryAuthentication';
                    $res = $provider->beginSecondaryAuthentication( $user, $beginReqs );
                } elseif ( !$state['secondary'][$id] ) {
                    $func = 'continueSecondaryAuthentication';
                    $res = $provider->continueSecondaryAuthentication( $user, $reqs );
                } else {
                    continue;
                }
                switch ( $res->status ) {
                    case AuthenticationResponse::PASS:
                        $this->logger->debug( "Secondary login with $id succeeded" );
                        // fall through
                    case AuthenticationResponse::ABSTAIN:
                        $state['secondary'][$id] = true;
                        break;
                    case AuthenticationResponse::FAIL:
                        $this->logger->debug( "Login failed in secondary authentication by $id" );
                        $this->callMethodOnProviders( 7, 'postAuthentication', [ $user, $res ] );
                        $session->remove( self::AUTHN_STATE );
                        $this->getHookRunner()->onAuthManagerLoginAuthenticateAudit(
                            $res, $user, $user->getName(), [
                                'performer' => $session->getUser()
                            ] );
                        return $res;
                    case AuthenticationResponse::REDIRECT:
                    case AuthenticationResponse::UI:
                        $this->logger->debug( "Secondary login with $id returned " . $res->status );
                        $this->fillRequests( $res->neededRequests, self::ACTION_LOGIN, $user->getName() );
                        $state['secondary'][$id] = false;
                        $state['continueRequests'] = $res->neededRequests;
                        $session->setSecret( self::AUTHN_STATE, $state );
                        return $res;
 
                        // @codeCoverageIgnoreStart
                    default:
                        throw new \DomainException(
                            get_class( $provider ) . "::{$func}() returned $res->status"
                        );
                        // @codeCoverageIgnoreEnd
                }
            }
 
            // Step 4: Authentication complete! Set the user in the session and
            // clean up.
 
            $this->logger->info( 'Login for {user} succeeded from {clientip}', [
                'user' => $user->getName(),
                'clientip' => $this->request->getIP(),
            ] );
            $rememberMeConfig = $this->config->get( MainConfigNames::RememberMe );
            if ( $rememberMeConfig === RememberMeAuthenticationRequest::ALWAYS_REMEMBER ) {
                $rememberMe = true;
            } elseif ( $rememberMeConfig === RememberMeAuthenticationRequest::NEVER_REMEMBER ) {
                $rememberMe = false;
            } else {
                $req = AuthenticationRequest::getRequestByClass(
                    $beginReqs, RememberMeAuthenticationRequest::class
                );
                $rememberMe = $req && $req->rememberMe;
            }
            $this->setSessionDataForUser( $user, $rememberMe );
            $ret = AuthenticationResponse::newPass( $user->getName() );
            $this->callMethodOnProviders( 7, 'postAuthentication', [ $user, $ret ] );
            $performer = $session->getUser();
            $session->remove( self::AUTHN_STATE );
            $this->removeAuthenticationSessionData( null );
            $this->getHookRunner()->onAuthManagerLoginAuthenticateAudit(
                $ret, $user, $user->getName(), [
                    'performer' => $performer
                ] );
            return $ret;
        } catch ( \Exception $ex ) {
            $session->remove( self::AUTHN_STATE );
            throw $ex;
        }
    }
 
    public function securitySensitiveOperationStatus( $operation ) {
        $status = self::SEC_OK;
 
        $this->logger->debug( __METHOD__ . ": Checking $operation" );
 
        $session = $this->request->getSession();
        $aId = $session->getUser()->getId();
        if ( $aId === 0 ) {
            // User isn't authenticated. DWIM?
            $status = $this->canAuthenticateNow() ? self::SEC_REAUTH : self::SEC_FAIL;
            $this->logger->info( __METHOD__ . ": Not logged in! $operation is $status" );
            return $status;
        }
 
        if ( $session->canSetUser() ) {
            $id = $session->get( 'AuthManager:lastAuthId' );
            $last = $session->get( 'AuthManager:lastAuthTimestamp' );
            if ( $id !== $aId || $last === null ) {
                $timeSinceLogin = PHP_INT_MAX; // Forever ago
            } else {
                $timeSinceLogin = max( 0, time() - $last );
            }
 
            $thresholds = $this->config->get( MainConfigNames::ReauthenticateTime );
            if ( isset( $thresholds[$operation] ) ) {
                $threshold = $thresholds[$operation];
            } elseif ( isset( $thresholds['default'] ) ) {
                $threshold = $thresholds['default'];
            } else {
                throw new \UnexpectedValueException( '$wgReauthenticateTime lacks a default' );
            }
 
            if ( $threshold >= 0 && $timeSinceLogin > $threshold ) {
                $status = self::SEC_REAUTH;
            }
        } else {
            $timeSinceLogin = -1;
 
            $pass = $this->config->get(
                MainConfigNames::AllowSecuritySensitiveOperationIfCannotReauthenticate );
            if ( isset( $pass[$operation] ) ) {
                $status = $pass[$operation] ? self::SEC_OK : self::SEC_FAIL;
            } elseif ( isset( $pass['default'] ) ) {
                $status = $pass['default'] ? self::SEC_OK : self::SEC_FAIL;
            } else {
                throw new \UnexpectedValueException(
                    '$wgAllowSecuritySensitiveOperationIfCannotReauthenticate lacks a default'
                );
            }
        }
 
        $this->getHookRunner()->onSecuritySensitiveOperationStatus(
            $status, $operation, $session, $timeSinceLogin );
 
        // If authentication is not possible, downgrade from "REAUTH" to "FAIL".
        if ( !$this->canAuthenticateNow() && $status === self::SEC_REAUTH ) {
            $status = self::SEC_FAIL;
        }
 
        $this->logger->info( __METHOD__ . ": $operation is $status for '{user}'",
            [
                'user' => $session->getUser()->getName(),
                'clientip' => $this->getRequest()->getIP(),
            ]
        );
 
        return $status;
    }
 
    public function userCanAuthenticate( $username ) {
        foreach ( $this->getPrimaryAuthenticationProviders() as $provider ) {
            if ( $provider->testUserCanAuthenticate( $username ) ) {
                return true;
            }
        }
        return false;
    }
 
    public function normalizeUsername( $username ) {
        $ret = [];
        foreach ( $this->getPrimaryAuthenticationProviders() as $provider ) {
            $normalized = $provider->providerNormalizeUsername( $username );
            if ( $normalized !== null ) {
                $ret[$normalized] = true;
            }
        }
        return array_keys( $ret );
    }
 
    public function setRequestContextUserFromSessionUser(): void {
        $context = RequestContext::getMain();
        $user = $context->getRequest()->getSession()->getUser();
 
        StubGlobalUser::setUser( $user );
        $context->setUser( $user );
 
        // phpcs:ignore MediaWiki.Usage.ExtendClassUsage.FunctionVarUsage
        global $wgLang;
        // phpcs:ignore MediaWiki.Usage.ExtendClassUsage.FunctionVarUsage
        $wgLang = $context->getLanguage();
    }
 
    // endregion -- end of Authentication
 
    /***************************************************************************/
    // region   Authentication data changing
    public function revokeAccessForUser( $username ) {
        $this->logger->info( 'Revoking access for {user}', [
            'user' => $username,
        ] );
        $this->callMethodOnProviders( 6, 'providerRevokeAccessForUser', [ $username ] );
    }
 
    public function allowsAuthenticationDataChange( AuthenticationRequest $req, $checkData = true ) {
        $any = false;
        $providers = $this->getPrimaryAuthenticationProviders() +
            $this->getSecondaryAuthenticationProviders();
 
        foreach ( $providers as $provider ) {
            $status = $provider->providerAllowsAuthenticationDataChange( $req, $checkData );
            if ( !$status->isGood() ) {
                // If status is not good because reset email password last attempt was within
                // $wgPasswordReminderResendTime then return good status with throttled-mailpassword value;
                // otherwise, return the $status wrapped.
                return $status->hasMessage( 'throttled-mailpassword' )
                    ? Status::newGood( 'throttled-mailpassword' )
                    : Status::wrap( $status );
            }
            $any = $any || $status->value !== 'ignored';
        }
        if ( !$any ) {
            return Status::newGood( 'ignored' )
                ->warning( 'authmanager-change-not-supported' );
        }
        return Status::newGood();
    }
 
    public function changeAuthenticationData( AuthenticationRequest $req, $isAddition = false ) {
        $this->logger->info( 'Changing authentication data for {user} class {what}', [
            'user' => is_string( $req->username ) ? $req->username : '<no name>',
            'what' => get_class( $req ),
        ] );
 
        $this->callMethodOnProviders( 6, 'providerChangeAuthenticationData', [ $req ] );
 
        // When the main account's authentication data is changed, invalidate
        // all BotPasswords too.
        if ( !$isAddition ) {
            $this->botPasswordStore->invalidateUserPasswords( (string)$req->username );
        }
    }
 
    // endregion -- end of Authentication data changing
 
    /***************************************************************************/
    // region   Account creation
    public function canCreateAccounts() {
        foreach ( $this->getPrimaryAuthenticationProviders() as $provider ) {
            switch ( $provider->accountCreationType() ) {
                case PrimaryAuthenticationProvider::TYPE_CREATE:
                case PrimaryAuthenticationProvider::TYPE_LINK:
                    return true;
            }
        }
        return false;
    }
 
    public function canCreateAccount( $username, $options = [] ) {
        // Back compat
        if ( is_int( $options ) ) {
            $options = [ 'flags' => $options ];
        }
        $options += [
            'flags' => IDBAccessObject::READ_NORMAL,
            'creating' => false,
        ];
        // @phan-suppress-next-line PhanTypePossiblyInvalidDimOffset False positive
        $flags = $options['flags'];
 
        if ( !$this->canCreateAccounts() ) {
            return Status::newFatal( 'authmanager-create-disabled' );
        }
 
        if ( $this->userExists( $username, $flags ) ) {
            return Status::newFatal( 'userexists' );
        }
 
        $user = $this->userFactory->newFromName( (string)$username, UserRigorOptions::RIGOR_CREATABLE );
        if ( !is_object( $user ) ) {
            return Status::newFatal( 'noname' );
        } else {
            $user->load( $flags ); // Explicitly load with $flags, auto-loading always uses READ_NORMAL
            if ( $user->isRegistered() ) {
                return Status::newFatal( 'userexists' );
            }
        }
 
        // Denied by providers?
        $providers = $this->getPreAuthenticationProviders() +
            $this->getPrimaryAuthenticationProviders() +
            $this->getSecondaryAuthenticationProviders();
        foreach ( $providers as $provider ) {
            $status = $provider->testUserForCreation( $user, false, $options );
            if ( !$status->isGood() ) {
                return Status::wrap( $status );
            }
        }
 
        return Status::newGood();
    }
 
    private function authorizeInternal(
        callable $authorizer,
        string $action
    ): StatusValue {
        // Wiki is read-only?
        if ( $this->readOnlyMode->isReadOnly() ) {
            return StatusValue::newFatal( wfMessage( 'readonlytext', $this->readOnlyMode->getReason() ) );
        }
 
        $permStatus = new PermissionStatus();
        if ( !$authorizer(
            $action,
            SpecialPage::getTitleFor( 'CreateAccount' ),
            $permStatus
        ) ) {
            return $permStatus;
        }
 
        $ip = $this->getRequest()->getIP();
        if ( $this->blockManager->isDnsBlacklisted( $ip, true /* check $wgProxyWhitelist */ ) ) {
            return StatusValue::newFatal( 'sorbs_create_account_reason' );
        }
 
        return StatusValue::newGood();
    }
 
    public function probablyCanCreateAccount( Authority $creator ): StatusValue {
        return $this->authorizeInternal(
            static function (
                string $action,
                PageIdentity $target,
                PermissionStatus $status
            ) use ( $creator ) {
                return $creator->probablyCan( $action, $target, $status );
            },
            'createaccount'
        );
    }
 
    public function authorizeCreateAccount( Authority $creator ): StatusValue {
        return $this->authorizeInternal(
            static function (
                string $action,
                PageIdentity $target,
                PermissionStatus $status
            ) use ( $creator ) {
                return $creator->authorizeWrite( $action, $target, $status );
            },
            'createaccount'
        );
    }
 
    public function beginAccountCreation( Authority $creator, array $reqs, $returnToUrl ) {
        $session = $this->request->getSession();
        if ( !$this->canCreateAccounts() ) {
            // Caller should have called canCreateAccounts()
            $session->remove( self::ACCOUNT_CREATION_STATE );
            throw new \LogicException( 'Account creation is not possible' );
        }
 
        try {
            $username = AuthenticationRequest::getUsernameFromRequests( $reqs );
        } catch ( \UnexpectedValueException $ex ) {
            $username = null;
        }
        if ( $username === null ) {
            $this->logger->debug( __METHOD__ . ': No username provided' );
            return AuthenticationResponse::newFail( wfMessage( 'noname' ) );
        }
 
        // Permissions check
        $status = Status::wrap( $this->authorizeCreateAccount( $creator ) );
        if ( !$status->isGood() ) {
            $this->logger->debug( __METHOD__ . ': {creator} cannot create users: {reason}', [
                'user' => $username,
                'creator' => $creator->getUser()->getName(),
                'reason' => $status->getWikiText( false, false, 'en' )
            ] );
            return AuthenticationResponse::newFail( $status->getMessage() );
        }
 
        $status = $this->canCreateAccount(
            $username, [ 'flags' => IDBAccessObject::READ_LOCKING, 'creating' => true ]
        );
        if ( !$status->isGood() ) {
            $this->logger->debug( __METHOD__ . ': {user} cannot be created: {reason}', [
                'user' => $username,
                'creator' => $creator->getUser()->getName(),
                'reason' => $status->getWikiText( false, false, 'en' )
            ] );
            return AuthenticationResponse::newFail( $status->getMessage() );
        }
 
        $user = $this->userFactory->newFromName( (string)$username, UserRigorOptions::RIGOR_CREATABLE );
        foreach ( $reqs as $req ) {
            $req->username = $username;
            $req->returnToUrl = $returnToUrl;
            if ( $req instanceof UserDataAuthenticationRequest ) {
                // @phan-suppress-next-line PhanTypeMismatchArgumentNullable user should be checked and valid here
                $status = $req->populateUser( $user );
                if ( !$status->isGood() ) {
                    $status = Status::wrap( $status );
                    $session->remove( self::ACCOUNT_CREATION_STATE );
                    $this->logger->debug( __METHOD__ . ': UserData is invalid: {reason}', [
                        'user' => $user->getName(),
                        'creator' => $creator->getUser()->getName(),
                        'reason' => $status->getWikiText( false, false, 'en' ),
                    ] );
                    return AuthenticationResponse::newFail( $status->getMessage() );
                }
            }
        }
 
        $this->removeAuthenticationSessionData( null );
 
        $state = [
            'username' => $username,
            'userid' => 0,
            'creatorid' => $creator->getUser()->getId(),
            'creatorname' => $creator->getUser()->getName(),
            'reqs' => $reqs,
            'returnToUrl' => $returnToUrl,
            'primary' => null,
            'primaryResponse' => null,
            'secondary' => [],
            'continueRequests' => [],
            'maybeLink' => [],
            'ranPreTests' => false,
        ];
 
        // Special case: converting a login to an account creation
        $req = AuthenticationRequest::getRequestByClass(
            $reqs, CreateFromLoginAuthenticationRequest::class
        );
        if ( $req ) {
            $state['maybeLink'] = $req->maybeLink;
 
            if ( $req->createRequest ) {
                $reqs[] = $req->createRequest;
                $state['reqs'][] = $req->createRequest;
            }
        }
 
        $session->setSecret( self::ACCOUNT_CREATION_STATE, $state );
        $session->persist();
 
        return $this->continueAccountCreation( $reqs );
    }
 
    public function continueAccountCreation( array $reqs ) {
        $session = $this->request->getSession();
        try {
            if ( !$this->canCreateAccounts() ) {
                // Caller should have called canCreateAccounts()
                $session->remove( self::ACCOUNT_CREATION_STATE );
                throw new \LogicException( 'Account creation is not possible' );
            }
 
            $state = $session->getSecret( self::ACCOUNT_CREATION_STATE );
            if ( !is_array( $state ) ) {
                return AuthenticationResponse::newFail(
                    wfMessage( 'authmanager-create-not-in-progress' )
                );
            }
            $state['continueRequests'] = [];
 
            // Step 0: Prepare and validate the input
 
            $user = $this->userFactory->newFromName(
                (string)$state['username'],
                UserRigorOptions::RIGOR_CREATABLE
            );
            if ( !is_object( $user ) ) {
                $session->remove( self::ACCOUNT_CREATION_STATE );
                $this->logger->debug( __METHOD__ . ': Invalid username', [
                    'user' => $state['username'],
                ] );
                return AuthenticationResponse::newFail( wfMessage( 'noname' ) );
            }
 
            if ( $state['creatorid'] ) {
                $creator = $this->userFactory->newFromId( (int)$state['creatorid'] );
            } else {
                $creator = $this->userFactory->newAnonymous();
                $creator->setName( $state['creatorname'] );
            }
 
            // Avoid account creation races on double submissions
            $cache = MediaWikiServices::getInstance()->getObjectCacheFactory()->getLocalClusterInstance();
            $lock = $cache->getScopedLock( $cache->makeGlobalKey( 'account', md5( $user->getName() ) ) );
            if ( !$lock ) {
                // Don't clear AuthManager::accountCreationState for this code
                // path because the process that won the race owns it.
                $this->logger->debug( __METHOD__ . ': Could not acquire account creation lock', [
                    'user' => $user->getName(),
                    'creator' => $creator->getName(),
                ] );
                return AuthenticationResponse::newFail( wfMessage( 'usernameinprogress' ) );
            }
 
            // Permissions check
            $status = Status::wrap( $this->authorizeCreateAccount( $creator ) );
            if ( !$status->isGood() ) {
                $this->logger->debug( __METHOD__ . ': {creator} cannot create users: {reason}', [
                    'user' => $user->getName(),
                    'creator' => $creator->getName(),
                    'reason' => $status->getWikiText( false, false, 'en' )
                ] );
                $ret = AuthenticationResponse::newFail( $status->getMessage() );
                $this->callMethodOnProviders( 7, 'postAccountCreation', [ $user, $creator, $ret ] );
                $session->remove( self::ACCOUNT_CREATION_STATE );
                return $ret;
            }
 
            // Load from primary DB for existence check
            $user->load( IDBAccessObject::READ_LOCKING );
 
            if ( $state['userid'] === 0 ) {
                if ( $user->isRegistered() ) {
                    $this->logger->debug( __METHOD__ . ': User exists locally', [
                        'user' => $user->getName(),
                        'creator' => $creator->getName(),
                    ] );
                    $ret = AuthenticationResponse::newFail( wfMessage( 'userexists' ) );
                    $this->callMethodOnProviders( 7, 'postAccountCreation', [ $user, $creator, $ret ] );
                    $session->remove( self::ACCOUNT_CREATION_STATE );
                    return $ret;
                }
            } else {
                if ( !$user->isRegistered() ) {
                    $this->logger->debug( __METHOD__ . ': User does not exist locally when it should', [
                        'user' => $user->getName(),
                        'creator' => $creator->getName(),
                        'expected_id' => $state['userid'],
                    ] );
                    throw new \UnexpectedValueException(
                        "User \"{$state['username']}\" should exist now, but doesn't!"
                    );
                }
                if ( $user->getId() !== $state['userid'] ) {
                    $this->logger->debug( __METHOD__ . ': User ID/name mismatch', [
                        'user' => $user->getName(),
                        'creator' => $creator->getName(),
                        'expected_id' => $state['userid'],
                        'actual_id' => $user->getId(),
                    ] );
                    throw new \UnexpectedValueException(
                        "User \"{$state['username']}\" exists, but " .
                            "ID {$user->getId()} !== {$state['userid']}!"
                    );
                }
            }
            foreach ( $state['reqs'] as $req ) {
                if ( $req instanceof UserDataAuthenticationRequest ) {
                    $status = $req->populateUser( $user );
                    if ( !$status->isGood() ) {
                        // This should never happen...
                        $status = Status::wrap( $status );
                        $this->logger->debug( __METHOD__ . ': UserData is invalid: {reason}', [
                            'user' => $user->getName(),
                            'creator' => $creator->getName(),
                            'reason' => $status->getWikiText( false, false, 'en' ),
                        ] );
                        $ret = AuthenticationResponse::newFail( $status->getMessage() );
                        $this->callMethodOnProviders( 7, 'postAccountCreation', [ $user, $creator, $ret ] );
                        $session->remove( self::ACCOUNT_CREATION_STATE );
                        return $ret;
                    }
                }
            }
 
            foreach ( $reqs as $req ) {
                $req->returnToUrl = $state['returnToUrl'];
                $req->username = $state['username'];
            }
 
            // Run pre-creation tests, if we haven't already
            if ( !$state['ranPreTests'] ) {
                $providers = $this->getPreAuthenticationProviders() +
                    $this->getPrimaryAuthenticationProviders() +
                    $this->getSecondaryAuthenticationProviders();
                foreach ( $providers as $id => $provider ) {
                    $status = $provider->testForAccountCreation( $user, $creator, $reqs );
                    if ( !$status->isGood() ) {
                        $this->logger->debug( __METHOD__ . ": Fail in pre-authentication by $id", [
                            'user' => $user->getName(),
                            'creator' => $creator->getName(),
                        ] );
                        $ret = AuthenticationResponse::newFail(
                            Status::wrap( $status )->getMessage()
                        );
                        $this->callMethodOnProviders( 7, 'postAccountCreation', [ $user, $creator, $ret ] );
                        $session->remove( self::ACCOUNT_CREATION_STATE );
                        return $ret;
                    }
                }
 
                $state['ranPreTests'] = true;
            }
 
            // Step 1: Choose a primary authentication provider and call it until it succeeds.
 
            if ( $state['primary'] === null ) {
                // We haven't picked a PrimaryAuthenticationProvider yet
                foreach ( $this->getPrimaryAuthenticationProviders() as $id => $provider ) {
                    if ( $provider->accountCreationType() === PrimaryAuthenticationProvider::TYPE_NONE ) {
                        continue;
                    }
                    $res = $provider->beginPrimaryAccountCreation( $user, $creator, $reqs );
                    switch ( $res->status ) {
                        case AuthenticationResponse::PASS:
                            $this->logger->debug( __METHOD__ . ": Primary creation passed by $id", [
                                'user' => $user->getName(),
                                'creator' => $creator->getName(),
                            ] );
                            $state['primary'] = $id;
                            $state['primaryResponse'] = $res;
                            break 2;
                        case AuthenticationResponse::FAIL:
                            $this->logger->debug( __METHOD__ . ": Primary creation failed by $id", [
                                'user' => $user->getName(),
                                'creator' => $creator->getName(),
                            ] );
                            $this->callMethodOnProviders( 7, 'postAccountCreation', [ $user, $creator, $res ] );
                            $session->remove( self::ACCOUNT_CREATION_STATE );
                            return $res;
                        case AuthenticationResponse::ABSTAIN:
                            // Continue loop
                            break;
                        case AuthenticationResponse::REDIRECT:
                        case AuthenticationResponse::UI:
                            $this->logger->debug( __METHOD__ . ": Primary creation $res->status by $id", [
                                'user' => $user->getName(),
                                'creator' => $creator->getName(),
                            ] );
                            $this->fillRequests( $res->neededRequests, self::ACTION_CREATE, null );
                            $state['primary'] = $id;
                            $state['continueRequests'] = $res->neededRequests;
                            $session->setSecret( self::ACCOUNT_CREATION_STATE, $state );
                            return $res;
 
                            // @codeCoverageIgnoreStart
                        default:
                            throw new \DomainException(
                                get_class( $provider ) . "::beginPrimaryAccountCreation() returned $res->status"
                            );
                            // @codeCoverageIgnoreEnd
                    }
                }
                // @phan-suppress-next-line PhanTypePossiblyInvalidDimOffset Always set in loop before, if passed
                if ( $state['primary'] === null ) {
                    $this->logger->debug( __METHOD__ . ': Primary creation failed because no provider accepted', [
                        'user' => $user->getName(),
                        'creator' => $creator->getName(),
                    ] );
                    $ret = AuthenticationResponse::newFail(
                        wfMessage( 'authmanager-create-no-primary' )
                    );
                    $this->callMethodOnProviders( 7, 'postAccountCreation', [ $user, $creator, $ret ] );
                    $session->remove( self::ACCOUNT_CREATION_STATE );
                    return $ret;
                }
            } elseif ( $state['primaryResponse'] === null ) {
                $provider = $this->getAuthenticationProvider( $state['primary'] );
                if ( !$provider instanceof PrimaryAuthenticationProvider ) {
                    // Configuration changed? Force them to start over.
                    // @codeCoverageIgnoreStart
                    $ret = AuthenticationResponse::newFail(
                        wfMessage( 'authmanager-create-not-in-progress' )
                    );
                    $this->callMethodOnProviders( 7, 'postAccountCreation', [ $user, $creator, $ret ] );
                    $session->remove( self::ACCOUNT_CREATION_STATE );
                    return $ret;
                    // @codeCoverageIgnoreEnd
                }
                $id = $provider->getUniqueId();
                $res = $provider->continuePrimaryAccountCreation( $user, $creator, $reqs );
                switch ( $res->status ) {
                    case AuthenticationResponse::PASS:
                        $this->logger->debug( __METHOD__ . ": Primary creation passed by $id", [
                            'user' => $user->getName(),
                            'creator' => $creator->getName(),
                        ] );
                        $state['primaryResponse'] = $res;
                        break;
                    case AuthenticationResponse::FAIL:
                        $this->logger->debug( __METHOD__ . ": Primary creation failed by $id", [
                            'user' => $user->getName(),
                            'creator' => $creator->getName(),
                        ] );
                        $this->callMethodOnProviders( 7, 'postAccountCreation', [ $user, $creator, $res ] );
                        $session->remove( self::ACCOUNT_CREATION_STATE );
                        return $res;
                    case AuthenticationResponse::REDIRECT:
                    case AuthenticationResponse::UI:
                        $this->logger->debug( __METHOD__ . ": Primary creation $res->status by $id", [
                            'user' => $user->getName(),
                            'creator' => $creator->getName(),
                        ] );
                        $this->fillRequests( $res->neededRequests, self::ACTION_CREATE, null );
                        $state['continueRequests'] = $res->neededRequests;
                        $session->setSecret( self::ACCOUNT_CREATION_STATE, $state );
                        return $res;
                    default:
                        throw new \DomainException(
                            get_class( $provider ) . "::continuePrimaryAccountCreation() returned $res->status"
                        );
                }
            }
 
            // Step 2: Primary authentication succeeded, create the User object
            // and add the user locally.
 
            if ( $state['userid'] === 0 ) {
                $this->logger->info( 'Creating user {user} during account creation', [
                    'user' => $user->getName(),
                    'creator' => $creator->getName(),
                ] );
                $status = $user->addToDatabase();
                if ( !$status->isOK() ) {
                    // @codeCoverageIgnoreStart
                    $ret = AuthenticationResponse::newFail( $status->getMessage() );
                    $this->callMethodOnProviders( 7, 'postAccountCreation', [ $user, $creator, $ret ] );
                    $session->remove( self::ACCOUNT_CREATION_STATE );
                    return $ret;
                    // @codeCoverageIgnoreEnd
                }
                $this->setDefaultUserOptions( $user, $creator->isAnon() );
                $this->getHookRunner()->onLocalUserCreated( $user, false );
                $user->saveSettings();
                $state['userid'] = $user->getId();
 
                // Update user count
                DeferredUpdates::addUpdate( SiteStatsUpdate::factory( [ 'users' => 1 ] ) );
 
                // Watch user's userpage and talk page
                $this->watchlistManager->addWatchIgnoringRights( $user, $user->getUserPage() );
 
                // Inform the provider
                // @phan-suppress-next-next-line PhanPossiblyUndeclaredVariable
                // @phan-suppress-next-line PhanTypePossiblyInvalidDimOffset Always set in loop before, if passed
                $logSubtype = $provider->finishAccountCreation( $user, $creator, $state['primaryResponse'] );
 
                // Log the creation
                if ( $this->config->get( MainConfigNames::NewUserLog ) ) {
                    $isNamed = $creator->isNamed();
                    $logEntry = new \ManualLogEntry(
                        'newusers',
                        $logSubtype ?: ( $isNamed ? 'create2' : 'create' )
                    );
                    $logEntry->setPerformer( $isNamed ? $creator : $user );
                    $logEntry->setTarget( $user->getUserPage() );
                    $req = AuthenticationRequest::getRequestByClass(
                        $state['reqs'], CreationReasonAuthenticationRequest::class
                    );
                    $logEntry->setComment( $req ? $req->reason : '' );
                    $logEntry->setParameters( [
                        '4::userid' => $user->getId(),
                    ] );
                    $logid = $logEntry->insert();
                    $logEntry->publish( $logid );
                }
            }
 
            // Step 3: Iterate over all the secondary authentication providers.
 
            $beginReqs = $state['reqs'];
 
            foreach ( $this->getSecondaryAuthenticationProviders() as $id => $provider ) {
                if ( !isset( $state['secondary'][$id] ) ) {
                    // This provider isn't started yet, so we pass it the set
                    // of reqs from beginAuthentication instead of whatever
                    // might have been used by a previous provider in line.
                    $func = 'beginSecondaryAccountCreation';
                    $res = $provider->beginSecondaryAccountCreation( $user, $creator, $beginReqs );
                } elseif ( !$state['secondary'][$id] ) {
                    $func = 'continueSecondaryAccountCreation';
                    $res = $provider->continueSecondaryAccountCreation( $user, $creator, $reqs );
                } else {
                    continue;
                }
                switch ( $res->status ) {
                    case AuthenticationResponse::PASS:
                        $this->logger->debug( __METHOD__ . ": Secondary creation passed by $id", [
                            'user' => $user->getName(),
                            'creator' => $creator->getName(),
                        ] );
                        // fall through
                    case AuthenticationResponse::ABSTAIN:
                        $state['secondary'][$id] = true;
                        break;
                    case AuthenticationResponse::REDIRECT:
                    case AuthenticationResponse::UI:
                        $this->logger->debug( __METHOD__ . ": Secondary creation $res->status by $id", [
                            'user' => $user->getName(),
                            'creator' => $creator->getName(),
                        ] );
                        $this->fillRequests( $res->neededRequests, self::ACTION_CREATE, null );
                        $state['secondary'][$id] = false;
                        $state['continueRequests'] = $res->neededRequests;
                        $session->setSecret( self::ACCOUNT_CREATION_STATE, $state );
                        return $res;
                    case AuthenticationResponse::FAIL:
                        throw new \DomainException(
                            get_class( $provider ) . "::{$func}() returned $res->status." .
                            ' Secondary providers are not allowed to fail account creation, that' .
                            ' should have been done via testForAccountCreation().'
                        );
                            // @codeCoverageIgnoreStart
                    default:
                        throw new \DomainException(
                            get_class( $provider ) . "::{$func}() returned $res->status"
                        );
                            // @codeCoverageIgnoreEnd
                }
            }
 
            $id = $user->getId();
            $name = $user->getName();
            $req = new CreatedAccountAuthenticationRequest( $id, $name );
            $ret = AuthenticationResponse::newPass( $name );
            $ret->loginRequest = $req;
            $this->createdAccountAuthenticationRequests[] = $req;
 
            $this->logger->info( __METHOD__ . ': Account creation succeeded for {user}', [
                'user' => $user->getName(),
                'creator' => $creator->getName(),
            ] );
 
            $this->callMethodOnProviders( 7, 'postAccountCreation', [ $user, $creator, $ret ] );
            $session->remove( self::ACCOUNT_CREATION_STATE );
            $this->removeAuthenticationSessionData( null );
            return $ret;
        } catch ( \Exception $ex ) {
            $session->remove( self::ACCOUNT_CREATION_STATE );
            throw $ex;
        }
    }
 
    public function autoCreateUser(
        User $user,
        $source,
        $login = true,
        $log = true,
        ?Authority $performer = null
    ) {
        $validSources = [
            self::AUTOCREATE_SOURCE_SESSION,
            self::AUTOCREATE_SOURCE_MAINT,
            self::AUTOCREATE_SOURCE_TEMP
        ];
        if ( !in_array( $source, $validSources, true )
            && !$this->getAuthenticationProvider( $source ) instanceof PrimaryAuthenticationProvider
        ) {
            throw new InvalidArgumentException( "Unknown auto-creation source: $source" );
        }
 
        $username = $user->getName();
 
        // Try the local user from the replica DB
        $localUserIdentity = $this->userIdentityLookup->getUserIdentityByName( $username );
        $localId = ( $localUserIdentity && $localUserIdentity->getId() )
            ? $localUserIdentity->getId()
            : null;
        $flags = IDBAccessObject::READ_NORMAL;
 
        // Fetch the user ID from the primary, so that we don't try to create the user
        // when they already exist, due to replication lag
        // @codeCoverageIgnoreStart
        if (
            !$localId &&
            $this->loadBalancer->getReaderIndex() !== 0
        ) {
            $localUserIdentity = $this->userIdentityLookup->getUserIdentityByName(
                $username,
                IDBAccessObject::READ_LATEST
            );
            $localId = ( $localUserIdentity && $localUserIdentity->getId() )
                ? $localUserIdentity->getId()
                : null;
            $flags = IDBAccessObject::READ_LATEST;
        }
        // @codeCoverageIgnoreEnd
 
        if ( $localId ) {
            $this->logger->debug( __METHOD__ . ': {username} already exists locally', [
                'username' => $username,
            ] );
            $user->setId( $localId );
 
            // Can't rely on a replica read, even if getUserIdentityByName() used
            // READ_NORMAL, because that method has an in-process cache not shared
            // with loadFromId.
            $flags = IDBAccessObject::READ_LATEST;
            $user->loadFromId( $flags );
            if ( $login ) {
                $remember = $source === self::AUTOCREATE_SOURCE_TEMP;
                $this->setSessionDataForUser( $user, $remember );
            }
            return Status::newGood()->warning( 'userexists' );
        }
 
        // Wiki is read-only?
        if ( $this->readOnlyMode->isReadOnly() ) {
            $reason = $this->readOnlyMode->getReason();
            $this->logger->debug( __METHOD__ . ': denied because of read only mode: {reason}', [
                'username' => $username,
                'reason' => $reason,
            ] );
            $user->setId( 0 );
            $user->loadFromId();
            return Status::newFatal( wfMessage( 'readonlytext', $reason ) );
        }
 
        // If there is a non-anonymous performer, don't use their session
        $session = null;
        if ( !$performer || $performer->getUser()->equals( $user ) ) {
            $session = $this->request->getSession();
        }
 
        // Check the session, if we tried to create this user already there's
        // no point in retrying.
        if ( $session && $session->get( self::AUTOCREATE_BLOCKLIST ) ) {
            $this->logger->debug( __METHOD__ . ': blacklisted in session {sessionid}', [
                'username' => $username,
                'sessionid' => $session->getId(),
            ] );
            $user->setId( 0 );
            $user->loadFromId();
            $reason = $session->get( self::AUTOCREATE_BLOCKLIST );
            if ( $reason instanceof StatusValue ) {
                return Status::wrap( $reason );
            } else {
                return Status::newFatal( $reason );
            }
        }
 
        // Is the username usable? (Previously isCreatable() was checked here but
        // that doesn't work with auto-creation of TempUser accounts by CentralAuth)
        if ( !$this->userNameUtils->isUsable( $username ) ) {
            $this->logger->debug( __METHOD__ . ': name "{username}" is not usable', [
                'username' => $username,
            ] );
            if ( $session ) {
                $session->set( self::AUTOCREATE_BLOCKLIST, 'noname' );
            }
            $user->setId( 0 );
            $user->loadFromId();
            return Status::newFatal( 'noname' );
        }
 
        // Is the IP user able to create accounts?
        $performer ??= $this->userFactory->newAnonymous();
        $bypassAuthorization = $session ? $session->getProvider()->canAlwaysAutocreate() : false;
        if ( $source !== self::AUTOCREATE_SOURCE_MAINT && !$bypassAuthorization ) {
            $status = $this->authorizeAutoCreateAccount( $performer );
            if ( !$status->isOK() ) {
                $this->logger->debug( __METHOD__ . ': cannot create or autocreate accounts', [
                    'username' => $username,
                    'creator' => $performer->getUser()->getName(),
                ] );
                if ( $session ) {
                    $session->set( self::AUTOCREATE_BLOCKLIST, $status );
                    $session->persist();
                }
                $user->setId( 0 );
                $user->loadFromId();
                return Status::wrap( $status );
            }
        }
 
        // Avoid account creation races on double submissions
        $cache = MediaWikiServices::getInstance()->getObjectCacheFactory()->getLocalClusterInstance();
        $lock = $cache->getScopedLock( $cache->makeGlobalKey( 'account', md5( $username ) ) );
        if ( !$lock ) {
            $this->logger->debug( __METHOD__ . ': Could not acquire account creation lock', [
                'user' => $username,
            ] );
            $user->setId( 0 );
            $user->loadFromId();
            return Status::newFatal( 'usernameinprogress' );
        }
 
        // Denied by providers?
        $options = [
            'flags' => IDBAccessObject::READ_LATEST,
            'creating' => true,
        ];
        $providers = $this->getPreAuthenticationProviders() +
            $this->getPrimaryAuthenticationProviders() +
            $this->getSecondaryAuthenticationProviders();
        foreach ( $providers as $provider ) {
            $status = $provider->testUserForCreation( $user, $source, $options );
            if ( !$status->isGood() ) {
                $ret = Status::wrap( $status );
                $this->logger->debug( __METHOD__ . ': Provider denied creation of {username}: {reason}', [
                    'username' => $username,
                    'reason' => $ret->getWikiText( false, false, 'en' ),
                ] );
                if ( $session ) {
                    $session->set( self::AUTOCREATE_BLOCKLIST, $status );
                }
                $user->setId( 0 );
                $user->loadFromId();
                return $ret;
            }
        }
 
        $backoffKey = $cache->makeKey( 'AuthManager', 'autocreate-failed', md5( $username ) );
        if ( $cache->get( $backoffKey ) ) {
            $this->logger->debug( __METHOD__ . ': {username} denied by prior creation attempt failures', [
                'username' => $username,
            ] );
            $user->setId( 0 );
            $user->loadFromId();
            return Status::newFatal( 'authmanager-autocreate-exception' );
        }
 
        // Checks passed, create the user...
        $from = $_SERVER['REQUEST_URI'] ?? 'CLI';
        $this->logger->info( __METHOD__ . ': creating new user ({username}) - from: {from}', [
            'username' => $username,
            'from' => $from,
        ] );
 
        // Ignore warnings about primary connections/writes...hard to avoid here
        $trxProfiler = \Profiler::instance()->getTransactionProfiler();
        $scope = $trxProfiler->silenceForScope( $trxProfiler::EXPECTATION_REPLICAS_ONLY );
        try {
            $status = $user->addToDatabase();
            if ( !$status->isOK() ) {
                // Double-check for a race condition (T70012). We make use of the fact that when
                // addToDatabase fails due to the user already existing, the user object gets loaded.
                if ( $user->getId() ) {
                    $this->logger->info( __METHOD__ . ': {username} already exists locally (race)', [
                        'username' => $username,
                    ] );
                    if ( $login ) {
                        $remember = $source === self::AUTOCREATE_SOURCE_TEMP;
                        $this->setSessionDataForUser( $user, $remember );
                    }
                    $status = Status::newGood()->warning( 'userexists' );
                } else {
                    $this->logger->error( __METHOD__ . ': {username} failed with message {msg}', [
                        'username' => $username,
                        'msg' => $status->getWikiText( false, false, 'en' )
                    ] );
                    $user->setId( 0 );
                    $user->loadFromId();
                }
                return $status;
            }
        } catch ( \Exception $ex ) {
            $this->logger->error( __METHOD__ . ': {username} failed with exception {exception}', [
                'username' => $username,
                'exception' => $ex,
            ] );
            // Do not keep throwing errors for a while
            $cache->set( $backoffKey, 1, 600 );
            // Bubble up error; which should normally trigger DB rollbacks
            throw $ex;
        }
 
        $this->setDefaultUserOptions( $user, false );
 
        // Inform the providers
        $this->callMethodOnProviders( 6, 'autoCreatedAccount', [ $user, $source ] );
 
        $this->getHookRunner()->onLocalUserCreated( $user, true );
        $user->saveSettings();
 
        // Update user count
        DeferredUpdates::addUpdate( SiteStatsUpdate::factory( [ 'users' => 1 ] ) );
        // Watch user's userpage and talk page (except temp users)
        if ( $source !== self::AUTOCREATE_SOURCE_TEMP ) {
            DeferredUpdates::addCallableUpdate( function () use ( $user ) {
                $this->watchlistManager->addWatchIgnoringRights( $user, $user->getUserPage() );
            } );
        }
 
        // Log the creation
        if ( $this->config->get( MainConfigNames::NewUserLog ) && $log ) {
            $logEntry = new \ManualLogEntry( 'newusers', 'autocreate' );
            $logEntry->setPerformer( $user );
            $logEntry->setTarget( $user->getUserPage() );
            $logEntry->setComment( '' );
            $logEntry->setParameters( [
                '4::userid' => $user->getId(),
            ] );
            $logEntry->insert();
        }
 
        ScopedCallback::consume( $scope );
 
        if ( $login ) {
            $remember = $source === self::AUTOCREATE_SOURCE_TEMP;
            $this->setSessionDataForUser( $user, $remember );
        }
 
        return Status::newGood();
    }
 
    private function authorizeAutoCreateAccount( Authority $creator ) {
        return $this->authorizeInternal(
            static function (
                string $action,
                PageIdentity $target,
                PermissionStatus $status
            ) use ( $creator ) {
                return $creator->authorizeWrite( $action, $target, $status );
            },
            'autocreateaccount'
        );
    }
 
    // endregion -- end of Account creation
 
    /***************************************************************************/
    // region   Account linking
    public function canLinkAccounts() {
        foreach ( $this->getPrimaryAuthenticationProviders() as $provider ) {
            if ( $provider->accountCreationType() === PrimaryAuthenticationProvider::TYPE_LINK ) {
                return true;
            }
        }
        return false;
    }
 
    public function beginAccountLink( User $user, array $reqs, $returnToUrl ) {
        $session = $this->request->getSession();
        $session->remove( self::ACCOUNT_LINK_STATE );
 
        if ( !$this->canLinkAccounts() ) {
            // Caller should have called canLinkAccounts()
            throw new \LogicException( 'Account linking is not possible' );
        }
 
        if ( !$user->isRegistered() ) {
            if ( !$this->userNameUtils->isUsable( $user->getName() ) ) {
                $msg = wfMessage( 'noname' );
            } else {
                $msg = wfMessage( 'authmanager-userdoesnotexist', $user->getName() );
            }
            return AuthenticationResponse::newFail( $msg );
        }
        foreach ( $reqs as $req ) {
            $req->username = $user->getName();
            $req->returnToUrl = $returnToUrl;
        }
 
        $this->removeAuthenticationSessionData( null );
 
        $providers = $this->getPreAuthenticationProviders();
        foreach ( $providers as $id => $provider ) {
            $status = $provider->testForAccountLink( $user );
            if ( !$status->isGood() ) {
                $this->logger->debug( __METHOD__ . ": Account linking pre-check failed by $id", [
                    'user' => $user->getName(),
                ] );
                $ret = AuthenticationResponse::newFail(
                    Status::wrap( $status )->getMessage()
                );
                $this->callMethodOnProviders( 3, 'postAccountLink', [ $user, $ret ] );
                return $ret;
            }
        }
 
        $state = [
            'username' => $user->getName(),
            'userid' => $user->getId(),
            'returnToUrl' => $returnToUrl,
            'primary' => null,
            'continueRequests' => [],
        ];
 
        $providers = $this->getPrimaryAuthenticationProviders();
        foreach ( $providers as $id => $provider ) {
            if ( $provider->accountCreationType() !== PrimaryAuthenticationProvider::TYPE_LINK ) {
                continue;
            }
 
            $res = $provider->beginPrimaryAccountLink( $user, $reqs );
            switch ( $res->status ) {
                case AuthenticationResponse::PASS:
                    $this->logger->info( "Account linked to {user} by $id", [
                        'user' => $user->getName(),
                    ] );
                    $this->callMethodOnProviders( 3, 'postAccountLink', [ $user, $res ] );
                    return $res;
 
                case AuthenticationResponse::FAIL:
                    $this->logger->debug( __METHOD__ . ": Account linking failed by $id", [
                        'user' => $user->getName(),
                    ] );
                    $this->callMethodOnProviders( 3, 'postAccountLink', [ $user, $res ] );
                    return $res;
 
                case AuthenticationResponse::ABSTAIN:
                    // Continue loop
                    break;
 
                case AuthenticationResponse::REDIRECT:
                case AuthenticationResponse::UI:
                    $this->logger->debug( __METHOD__ . ": Account linking $res->status by $id", [
                        'user' => $user->getName(),
                    ] );
                    $this->fillRequests( $res->neededRequests, self::ACTION_LINK, $user->getName() );
                    $state['primary'] = $id;
                    $state['continueRequests'] = $res->neededRequests;
                    $session->setSecret( self::ACCOUNT_LINK_STATE, $state );
                    $session->persist();
                    return $res;
 
                    // @codeCoverageIgnoreStart
                default:
                    throw new \DomainException(
                        get_class( $provider ) . "::beginPrimaryAccountLink() returned $res->status"
                    );
                    // @codeCoverageIgnoreEnd
            }
        }
 
        $this->logger->debug( __METHOD__ . ': Account linking failed because no provider accepted', [
            'user' => $user->getName(),
        ] );
        $ret = AuthenticationResponse::newFail(
            wfMessage( 'authmanager-link-no-primary' )
        );
        $this->callMethodOnProviders( 3, 'postAccountLink', [ $user, $ret ] );
        return $ret;
    }
 
    public function continueAccountLink( array $reqs ) {
        $session = $this->request->getSession();
        try {
            if ( !$this->canLinkAccounts() ) {
                // Caller should have called canLinkAccounts()
                $session->remove( self::ACCOUNT_LINK_STATE );
                throw new \LogicException( 'Account linking is not possible' );
            }
 
            $state = $session->getSecret( self::ACCOUNT_LINK_STATE );
            if ( !is_array( $state ) ) {
                return AuthenticationResponse::newFail(
                    wfMessage( 'authmanager-link-not-in-progress' )
                );
            }
            $state['continueRequests'] = [];
 
            // Step 0: Prepare and validate the input
 
            $user = $this->userFactory->newFromName(
                (string)$state['username'],
                UserRigorOptions::RIGOR_USABLE
            );
            if ( !is_object( $user ) ) {
                $session->remove( self::ACCOUNT_LINK_STATE );
                return AuthenticationResponse::newFail( wfMessage( 'noname' ) );
            }
            if ( $user->getId() !== $state['userid'] ) {
                throw new \UnexpectedValueException(
                    "User \"{$state['username']}\" is valid, but " .
                        "ID {$user->getId()} !== {$state['userid']}!"
                );
            }
 
            foreach ( $reqs as $req ) {
                $req->username = $state['username'];
                $req->returnToUrl = $state['returnToUrl'];
            }
 
            // Step 1: Call the primary again until it succeeds
 
            $provider = $this->getAuthenticationProvider( $state['primary'] );
            if ( !$provider instanceof PrimaryAuthenticationProvider ) {
                // Configuration changed? Force them to start over.
                // @codeCoverageIgnoreStart
                $ret = AuthenticationResponse::newFail(
                    wfMessage( 'authmanager-link-not-in-progress' )
                );
                $this->callMethodOnProviders( 3, 'postAccountLink', [ $user, $ret ] );
                $session->remove( self::ACCOUNT_LINK_STATE );
                return $ret;
                // @codeCoverageIgnoreEnd
            }
            $id = $provider->getUniqueId();
            $res = $provider->continuePrimaryAccountLink( $user, $reqs );
            switch ( $res->status ) {
                case AuthenticationResponse::PASS:
                    $this->logger->info( "Account linked to {user} by $id", [
                        'user' => $user->getName(),
                    ] );
                    $this->callMethodOnProviders( 3, 'postAccountLink', [ $user, $res ] );
                    $session->remove( self::ACCOUNT_LINK_STATE );
                    return $res;
                case AuthenticationResponse::FAIL:
                    $this->logger->debug( __METHOD__ . ": Account linking failed by $id", [
                        'user' => $user->getName(),
                    ] );
                    $this->callMethodOnProviders( 3, 'postAccountLink', [ $user, $res ] );
                    $session->remove( self::ACCOUNT_LINK_STATE );
                    return $res;
                case AuthenticationResponse::REDIRECT:
                case AuthenticationResponse::UI:
                    $this->logger->debug( __METHOD__ . ": Account linking $res->status by $id", [
                        'user' => $user->getName(),
                    ] );
                    $this->fillRequests( $res->neededRequests, self::ACTION_LINK, $user->getName() );
                    $state['continueRequests'] = $res->neededRequests;
                    $session->setSecret( self::ACCOUNT_LINK_STATE, $state );
                    return $res;
                default:
                    throw new \DomainException(
                        get_class( $provider ) . "::continuePrimaryAccountLink() returned $res->status"
                    );
            }
        } catch ( \Exception $ex ) {
            $session->remove( self::ACCOUNT_LINK_STATE );
            throw $ex;
        }
    }
 
    // endregion -- end of Account linking
 
    /***************************************************************************/
    // region   Information methods
    public function getAuthenticationRequests( $action, UserIdentity $user = null ) {
        $options = [];
        $providerAction = $action;
 
        // Figure out which providers to query
        switch ( $action ) {
            case self::ACTION_LOGIN:
            case self::ACTION_CREATE:
                $providers = $this->getPreAuthenticationProviders() +
                    $this->getPrimaryAuthenticationProviders() +
                    $this->getSecondaryAuthenticationProviders();
                break;
 
            case self::ACTION_LOGIN_CONTINUE:
                $state = $this->request->getSession()->getSecret( self::AUTHN_STATE );
                return is_array( $state ) ? $state['continueRequests'] : [];
 
            case self::ACTION_CREATE_CONTINUE:
                $state = $this->request->getSession()->getSecret( self::ACCOUNT_CREATION_STATE );
                return is_array( $state ) ? $state['continueRequests'] : [];
 
            case self::ACTION_LINK:
                $providers = [];
                foreach ( $this->getPrimaryAuthenticationProviders() as $p ) {
                    if ( $p->accountCreationType() === PrimaryAuthenticationProvider::TYPE_LINK ) {
                        $providers[] = $p;
                    }
                }
                break;
 
            case self::ACTION_UNLINK:
                $providers = [];
                foreach ( $this->getPrimaryAuthenticationProviders() as $p ) {
                    if ( $p->accountCreationType() === PrimaryAuthenticationProvider::TYPE_LINK ) {
                        $providers[] = $p;
                    }
                }
 
                // To providers, unlink and remove are identical.
                $providerAction = self::ACTION_REMOVE;
                break;
 
            case self::ACTION_LINK_CONTINUE:
                $state = $this->request->getSession()->getSecret( self::ACCOUNT_LINK_STATE );
                return is_array( $state ) ? $state['continueRequests'] : [];
 
            case self::ACTION_CHANGE:
            case self::ACTION_REMOVE:
                $providers = $this->getPrimaryAuthenticationProviders() +
                    $this->getSecondaryAuthenticationProviders();
                break;
 
            // @codeCoverageIgnoreStart
            default:
                throw new \DomainException( __METHOD__ . ": Invalid action \"$action\"" );
        }
        // @codeCoverageIgnoreEnd
 
        return $this->getAuthenticationRequestsInternal( $providerAction, $options, $providers, $user );
    }
 
    private function getAuthenticationRequestsInternal(
        $providerAction, array $options, array $providers, UserIdentity $user = null
    ) {
        $user = $user ?: RequestContext::getMain()->getUser();
        $options['username'] = $user->isRegistered() ? $user->getName() : null;
 
        // Query them and merge results
        $reqs = [];
        foreach ( $providers as $provider ) {
            $isPrimary = $provider instanceof PrimaryAuthenticationProvider;
            foreach ( $provider->getAuthenticationRequests( $providerAction, $options ) as $req ) {
                $id = $req->getUniqueId();
 
                // If a required request if from a Primary, mark it as "primary-required" instead
                if ( $isPrimary && $req->required ) {
                    $req->required = AuthenticationRequest::PRIMARY_REQUIRED;
                }
 
                if (
                    !isset( $reqs[$id] )
                    || $req->required === AuthenticationRequest::REQUIRED
                    || $reqs[$id] === AuthenticationRequest::OPTIONAL
                ) {
                    $reqs[$id] = $req;
                }
            }
        }
 
        // AuthManager has its own req for some actions
        switch ( $providerAction ) {
            case self::ACTION_LOGIN:
                $reqs[] = new RememberMeAuthenticationRequest(
                    $this->config->get( MainConfigNames::RememberMe ) );
                $options['username'] = null; // Don't fill in the username below
                break;
 
            case self::ACTION_CREATE:
                $reqs[] = new UsernameAuthenticationRequest;
                $reqs[] = new UserDataAuthenticationRequest;
                if ( $options['username'] !== null ) {
                    $reqs[] = new CreationReasonAuthenticationRequest;
                    $options['username'] = null; // Don't fill in the username below
                }
                break;
        }
 
        // Fill in reqs data
        $this->fillRequests( $reqs, $providerAction, $options['username'], true );
 
        // For self::ACTION_CHANGE, filter out any that something else *doesn't* allow changing
        if ( $providerAction === self::ACTION_CHANGE || $providerAction === self::ACTION_REMOVE ) {
            $reqs = array_filter( $reqs, function ( $req ) {
                return $this->allowsAuthenticationDataChange( $req, false )->isGood();
            } );
        }
 
        return array_values( $reqs );
    }
 
    private function fillRequests( array &$reqs, $action, $username, $forceAction = false ) {
        foreach ( $reqs as $req ) {
            if ( !$req->action || $forceAction ) {
                $req->action = $action;
            }
            $req->username ??= $username;
        }
    }
 
    public function userExists( $username, $flags = IDBAccessObject::READ_NORMAL ) {
        foreach ( $this->getPrimaryAuthenticationProviders() as $provider ) {
            if ( $provider->testUserExists( $username, $flags ) ) {
                return true;
            }
        }
 
        return false;
    }
 
    public function allowsPropertyChange( $property ) {
        $providers = $this->getPrimaryAuthenticationProviders() +
            $this->getSecondaryAuthenticationProviders();
        foreach ( $providers as $provider ) {
            if ( !$provider->providerAllowsPropertyChange( $property ) ) {
                return false;
            }
        }
        return true;
    }
 
    public function getAuthenticationProvider( $id ) {
        // Fast version
        if ( isset( $this->allAuthenticationProviders[$id] ) ) {
            return $this->allAuthenticationProviders[$id];
        }
 
        // Slow version: instantiate each kind and check
        $providers = $this->getPrimaryAuthenticationProviders();
        if ( isset( $providers[$id] ) ) {
            return $providers[$id];
        }
        $providers = $this->getSecondaryAuthenticationProviders();
        if ( isset( $providers[$id] ) ) {
            return $providers[$id];
        }
        $providers = $this->getPreAuthenticationProviders();
        if ( isset( $providers[$id] ) ) {
            return $providers[$id];
        }
 
        return null;
    }
 
    // endregion -- end of Information methods
 
    /***************************************************************************/
    // region   Internal methods
    public function setAuthenticationSessionData( $key, $data ) {
        $session = $this->request->getSession();
        $arr = $session->getSecret( 'authData' );
        if ( !is_array( $arr ) ) {
            $arr = [];
        }
        $arr[$key] = $data;
        $session->setSecret( 'authData', $arr );
    }
 
    public function getAuthenticationSessionData( $key, $default = null ) {
        $arr = $this->request->getSession()->getSecret( 'authData' );
        if ( is_array( $arr ) && array_key_exists( $key, $arr ) ) {
            return $arr[$key];
        } else {
            return $default;
        }
    }
 
    public function removeAuthenticationSessionData( $key ) {
        $session = $this->request->getSession();
        if ( $key === null ) {
            $session->remove( 'authData' );
        } else {
            $arr = $session->getSecret( 'authData' );
            if ( is_array( $arr ) && array_key_exists( $key, $arr ) ) {
                unset( $arr[$key] );
                $session->setSecret( 'authData', $arr );
            }
        }
    }
 
    protected function providerArrayFromSpecs( $class, array $specs ) {
        $i = 0;
        foreach ( $specs as &$spec ) {
            $spec = [ 'sort2' => $i++ ] + $spec + [ 'sort' => 0 ];
        }
        unset( $spec );
        // Sort according to the 'sort' field, and if they are equal, according to 'sort2'
        usort( $specs, static function ( $a, $b ) {
            return $a['sort'] <=> $b['sort']
                ?: $a['sort2'] <=> $b['sort2'];
        } );
 
        $ret = [];
        foreach ( $specs as $spec ) {
            $provider = $this->objectFactory->createObject( $spec, [ 'assertClass' => $class ] );
            $provider->init( $this->logger, $this, $this->getHookContainer(), $this->config, $this->userNameUtils );
            $id = $provider->getUniqueId();
            if ( isset( $this->allAuthenticationProviders[$id] ) ) {
                throw new \RuntimeException(
                    "Duplicate specifications for id $id (classes " .
                    get_class( $provider ) . ' and ' .
                    get_class( $this->allAuthenticationProviders[$id] ) . ')'
                );
            }
            $this->allAuthenticationProviders[$id] = $provider;
            $ret[$id] = $provider;
        }
        return $ret;
    }
 
    private function getConfiguration() {
        return $this->config->get( MainConfigNames::AuthManagerConfig )
            ?: $this->config->get( MainConfigNames::AuthManagerAutoConfig );
    }
 
    protected function getPreAuthenticationProviders() {
        if ( $this->preAuthenticationProviders === null ) {
            $conf = $this->getConfiguration();
            $this->preAuthenticationProviders = $this->providerArrayFromSpecs(
                PreAuthenticationProvider::class, $conf['preauth']
            );
        }
        return $this->preAuthenticationProviders;
    }
 
    protected function getPrimaryAuthenticationProviders() {
        if ( $this->primaryAuthenticationProviders === null ) {
            $conf = $this->getConfiguration();
            $this->primaryAuthenticationProviders = $this->providerArrayFromSpecs(
                PrimaryAuthenticationProvider::class, $conf['primaryauth']
            );
        }
        return $this->primaryAuthenticationProviders;
    }
 
    protected function getSecondaryAuthenticationProviders() {
        if ( $this->secondaryAuthenticationProviders === null ) {
            $conf = $this->getConfiguration();
            $this->secondaryAuthenticationProviders = $this->providerArrayFromSpecs(
                SecondaryAuthenticationProvider::class, $conf['secondaryauth']
            );
        }
        return $this->secondaryAuthenticationProviders;
    }
 
    private function setSessionDataForUser( $user, $remember = null ) {
        $session = $this->request->getSession();
        $delay = $session->delaySave();
 
        $session->resetId();
        $session->resetAllTokens();
        if ( $session->canSetUser() ) {
            $session->setUser( $user );
        }
        if ( $remember !== null ) {
            $session->setRememberUser( $remember );
        }
        $session->set( 'AuthManager:lastAuthId', $user->getId() );
        $session->set( 'AuthManager:lastAuthTimestamp', time() );
        $session->persist();
 
        \Wikimedia\ScopedCallback::consume( $delay );
 
        $this->getHookRunner()->onUserLoggedIn( $user );
    }
 
    private function setDefaultUserOptions( User $user, $useContextLang ) {
        $user->setToken();
 
        $lang = $useContextLang ? RequestContext::getMain()->getLanguage() : $this->contentLanguage;
        $this->userOptionsManager->setOption(
            $user,
            'language',
            $this->languageConverterFactory->getLanguageConverter( $lang )->getPreferredVariant()
        );
 
        $contLangConverter = $this->languageConverterFactory->getLanguageConverter( $this->contentLanguage );
        if ( $contLangConverter->hasVariants() ) {
            $this->userOptionsManager->setOption(
                $user,
                'variant',
                $contLangConverter->getPreferredVariant()
            );
        }
    }
 
    private function callMethodOnProviders( $which, $method, array $args ) {
        $providers = [];
        if ( $which & 1 ) {
            $providers += $this->getPreAuthenticationProviders();
        }
        if ( $which & 2 ) {
            $providers += $this->getPrimaryAuthenticationProviders();
        }
        if ( $which & 4 ) {
            $providers += $this->getSecondaryAuthenticationProviders();
        }
        foreach ( $providers as $provider ) {
            $provider->$method( ...$args );
        }
    }
 
    private function getHookContainer() {
        return $this->hookContainer;
    }
 
    private function getHookRunner() {
        return $this->hookRunner;
    }
 
    // endregion -- end of Internal methods
 
}
 
/*
 * This file uses VisualStudio style region/endregion fold markers which are
 * recognised by PHPStorm. If modelines are enabled, the following editor
 * configuration will also enable folding in vim, if it is in the last 5 lines
 * of the file. We also use "@name" which creates sections in Doxygen.
 *
 * vim: foldmarker=//\ region,//\ endregion foldmethod=marker
 */