includes/specials/SpecialUserlogin.php

   1 <?php
   2 /**
   3  * Implements Special:UserLogin
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License along
  16  * with this program; if not, write to the Free Software Foundation, Inc.,
  17  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  18  * http://www.gnu.org/copyleft/gpl.html
  19  *
  20  * @file
  21  * @ingroup SpecialPage
  22  */
  23
  24 /**
  25  * Implements Special:UserLogin
  26  *
  27  * @ingroup SpecialPage
  28  */
  29 class LoginForm extends SpecialPage {
  30
  31         const SUCCESS = 0;
  32         const NO_NAME = 1;
  33         const ILLEGAL = 2;
  34         const WRONG_PLUGIN_PASS = 3;
  35         const NOT_EXISTS = 4;
  36         const WRONG_PASS = 5;
  37         const EMPTY_PASS = 6;
  38         const RESET_PASS = 7;
  39         const ABORTED = 8;
  40         const CREATE_BLOCKED = 9;
  41         const THROTTLED = 10;
  42         const USER_BLOCKED = 11;
  43         const NEED_TOKEN = 12;
  44         const WRONG_TOKEN = 13;
  45
  46         var $mUsername, $mPassword, $mRetype, $mReturnTo, $mCookieCheck, $mPosted;
  47         var $mAction, $mCreateaccount, $mCreateaccountMail;
  48         var $mLoginattempt, $mRemember, $mEmail, $mDomain, $mLanguage;
  49         var $mSkipCookieCheck, $mReturnToQuery, $mToken, $mStickHTTPS;
  50         var $mType, $mReason, $mRealName;
  51         var $mAbortLoginErrorMsg = 'login-abort-generic';
  52         private $mLoaded = false;
  53
  54         /**
  55          * @var ExternalUser
  56          */
  57         private $mExtUser = null;
  58
  59         /**
  60          * @ var WebRequest
  61          */
  62         private $mOverrideRequest = null;
  63
  64         /**
  65          * @param WebRequest $request
  66          */
  67         public function __construct( $request = null ) {
  68                 parent::__construct( 'Userlogin' );
  69
  70                 $this->mOverrideRequest = $request;
  71         }
  72
  73         /**
  74          * Loader
  75          */
  76         function load() {
  77                 global $wgAuth, $wgHiddenPrefs, $wgEnableEmail;
  78
  79                 if ( $this->mLoaded ) {
  80                         return;
  81                 }
  82                 $this->mLoaded = true;
  83
  84                 if ( $this->mOverrideRequest === null ) {
  85                         $request = $this->getRequest();
  86                 } else {
  87                         $request = $this->mOverrideRequest;
  88                 }
  89
  90                 $this->mType = $request->getText( 'type' );
  91                 $this->mUsername = $request->getText( 'wpName' );
  92                 $this->mPassword = $request->getText( 'wpPassword' );
  93                 $this->mRetype = $request->getText( 'wpRetype' );
  94                 $this->mDomain = $request->getText( 'wpDomain' );
  95                 $this->mReason = $request->getText( 'wpReason' );
  96                 $this->mCookieCheck = $request->getVal( 'wpCookieCheck' );
  97                 $this->mPosted = $request->wasPosted();
  98                 $this->mCreateaccount = $request->getCheck( 'wpCreateaccount' );
  99                 $this->mCreateaccountMail = $request->getCheck( 'wpCreateaccountMail' )
 100                                                                         && $wgEnableEmail;
 101                 $this->mLoginattempt = $request->getCheck( 'wpLoginattempt' );
 102                 $this->mAction = $request->getVal( 'action' );
 103                 $this->mRemember = $request->getCheck( 'wpRemember' );
 104                 $this->mStickHTTPS = $request->getCheck( 'wpStickHTTPS' );
 105                 $this->mLanguage = $request->getText( 'uselang' );
 106                 $this->mSkipCookieCheck = $request->getCheck( 'wpSkipCookieCheck' );
 107                 $this->mToken = ( $this->mType == 'signup' ) ? $request->getVal( 'wpCreateaccountToken' ) : $request->getVal( 'wpLoginToken' );
 108
 109                 $this->mReturnTo = $request->getVal( 'returnto', '' );
 110                 $this->mReturnToQuery = $request->getVal( 'returntoquery', '' );
 111
 112                 if( $wgEnableEmail ) {
 113                         $this->mEmail = $request->getText( 'wpEmail' );
 114                 } else {
 115                         $this->mEmail = '';
 116                 }
 117                 if( !in_array( 'realname', $wgHiddenPrefs ) ) {
 118                         $this->mRealName = $request->getText( 'wpRealName' );
 119                 } else {
 120                         $this->mRealName = '';
 121                 }
 122
 123                 if( !$wgAuth->validDomain( $this->mDomain ) ) {
 124                         $this->mDomain = $wgAuth->getDomain();
 125                 }
 126                 $wgAuth->setDomain( $this->mDomain );
 127
 128                 # 1. When switching accounts, it sucks to get automatically logged out
 129                 # 2. Do not return to PasswordReset after a successful password change
 130                 #    but goto Wiki start page (Main_Page) instead ( bug 33997 )
 131                 $returnToTitle = Title::newFromText( $this->mReturnTo );
 132                 if( is_object( $returnToTitle ) && (
 133                         $returnToTitle->isSpecial( 'Userlogout' )
 134                         || $returnToTitle->isSpecial( 'PasswordReset' ) ) ) {
 135                         $this->mReturnTo = '';
 136                         $this->mReturnToQuery = '';
 137                 }
 138         }
 139
 140         function getDescription() {
 141                 return $this->msg( $this->getUser()->isAllowed( 'createaccount' ) ?
 142                         'userlogin' : 'userloginnocreate' )->text();
 143         }
 144
 145         public function execute( $par ) {
 146                 if ( session_id() == '' ) {
 147                         wfSetupSession();
 148                 }
 149
 150                 $this->load();
 151                 $this->setHeaders();
 152
 153                 if ( $par == 'signup' ) { # Check for [[Special:Userlogin/signup]]
 154                         $this->mType = 'signup';
 155                 }
 156
 157                 if ( !is_null( $this->mCookieCheck ) ) {
 158                         $this->onCookieRedirectCheck( $this->mCookieCheck );
 159                         return;
 160                 } elseif( $this->mPosted ) {
 161                         if( $this->mCreateaccount ) {
 162                                 $this->addNewAccount();
 163                                 return;
 164                         } elseif ( $this->mCreateaccountMail ) {
 165                                 $this->addNewAccountMailPassword();
 166                                 return;
 167                         } elseif ( ( 'submitlogin' == $this->mAction ) || $this->mLoginattempt ) {
 168                                 $this->processLogin();
 169                                 return;
 170                         }
 171                 }
 172                 $this->mainLoginForm( '' );
 173         }
 174
 175         /**
 176          * @private
 177          */
 178         function addNewAccountMailPassword() {
 179                 if ( $this->mEmail == '' ) {
 180                         $this->mainLoginForm( $this->msg( 'noemailcreate' )->escaped() );
 181                         return;
 182                 }
 183
 184                 $u = $this->addNewaccountInternal();
 185
 186                 if ( $u == null ) {
 187                         return;
 188                 }
 189
 190                 // Wipe the initial password and mail a temporary one
 191                 $u->setPassword( null );
 192                 $u->saveSettings();
 193                 $result = $this->mailPasswordInternal( $u, false, 'createaccount-title', 'createaccount-text' );
 194
 195                 wfRunHooks( 'AddNewAccount', array( $u, true ) );
 196                 $u->addNewUserLogEntry( true, $this->mReason );
 197
 198                 $out = $this->getOutput();
 199                 $out->setPageTitle( $this->msg( 'accmailtitle' ) );
 200
 201                 if( !$result->isGood() ) {
 202                         $this->mainLoginForm( $this->msg( 'mailerror', $result->getWikiText() )->text() );
 203                 } else {
 204                         $out->addWikiMsg( 'accmailtext', $u->getName(), $u->getEmail() );
 205                         $this->executeReturnTo( 'success' );
 206                 }
 207         }
 208
 209         /**
 210          * @private
 211          * @return bool
 212          */
 213         function addNewAccount() {
 214                 global $wgUser, $wgEmailAuthentication, $wgLoginLanguageSelector;
 215
 216                 # Create the account and abort if there's a problem doing so
 217                 $u = $this->addNewAccountInternal();
 218                 if( $u == null ) {
 219                         return false;
 220                 }
 221
 222                 # If we showed up language selection links, and one was in use, be
 223                 # smart (and sensible) and save that language as the user's preference
 224                 if( $wgLoginLanguageSelector && $this->mLanguage ) {
 225                         $u->setOption( 'language', $this->mLanguage );
 226                 }
 227
 228                 $out = $this->getOutput();
 229
 230                 # Send out an email authentication message if needed
 231                 if( $wgEmailAuthentication && Sanitizer::validateEmail( $u->getEmail() ) ) {
 232                         $status = $u->sendConfirmationMail();
 233                         if( $status->isGood() ) {
 234                                 $out->addWikiMsg( 'confirmemail_oncreate' );
 235                         } else {
 236                                 $out->addWikiText( $status->getWikiText( 'confirmemail_sendfailed' ) );
 237                         }
 238                 }
 239
 240                 # Save settings (including confirmation token)
 241                 $u->saveSettings();
 242
 243                 # If not logged in, assume the new account as the current one and set
 244                 # session cookies then show a "welcome" message or a "need cookies"
 245                 # message as needed
 246                 if( $this->getUser()->isAnon() ) {
 247                         $u->setCookies();
 248                         $wgUser = $u;
 249                         // This should set it for OutputPage and the Skin
 250                         // which is needed or the personal links will be
 251                         // wrong.
 252                         $this->getContext()->setUser( $u );
 253                         wfRunHooks( 'AddNewAccount', array( $u, false ) );
 254                         $u->addNewUserLogEntry();
 255                         if( $this->hasSessionCookie() ) {
 256                                 $this->successfulCreation();
 257                         } else {
 258                                 $this->cookieRedirectCheck( 'new' );
 259                         }
 260                 } else {
 261                         # Confirm that the account was created
 262                         $out->setPageTitle( $this->msg( 'accountcreated' ) );
 263                         $out->addWikiMsg( 'accountcreatedtext', $u->getName() );
 264                         $out->addReturnTo( $this->getTitle() );
 265                         wfRunHooks( 'AddNewAccount', array( $u, false ) );
 266                         $u->addNewUserLogEntry( false, $this->mReason );
 267                 }
 268                 return true;
 269         }
 270
 271         /**
 272          * @private
 273          * @return bool|User
 274          */
 275         function addNewAccountInternal() {
 276                 global $wgAuth, $wgMemc, $wgAccountCreationThrottle,
 277                         $wgMinimalPasswordLength, $wgEmailConfirmToEdit;
 278
 279                 // If the user passes an invalid domain, something is fishy
 280                 if( !$wgAuth->validDomain( $this->mDomain ) ) {
 281                         $this->mainLoginForm( $this->msg( 'wrongpassword' )->text() );
 282                         return false;
 283                 }
 284
 285                 // If we are not allowing users to login locally, we should be checking
 286                 // to see if the user is actually able to authenticate to the authenti-
 287                 // cation server before they create an account (otherwise, they can
 288                 // create a local account and login as any domain user). We only need
 289                 // to check this for domains that aren't local.
 290                 if( 'local' != $this->mDomain && $this->mDomain != '' ) {
 291                         if( !$wgAuth->canCreateAccounts() && ( !$wgAuth->userExists( $this->mUsername )
 292                                 || !$wgAuth->authenticate( $this->mUsername, $this->mPassword ) ) ) {
 293                                 $this->mainLoginForm( $this->msg( 'wrongpassword' )->text() );
 294                                 return false;
 295                         }
 296                 }
 297
 298                 if ( wfReadOnly() ) {
 299                         throw new ReadOnlyError;
 300                 }
 301
 302                 # Request forgery checks.
 303                 if ( !self::getCreateaccountToken() ) {
 304                         self::setCreateaccountToken();
 305                         $this->mainLoginForm( $this->msg( 'nocookiesfornew' )->parse() );
 306                         return false;
 307                 }
 308
 309                 # The user didn't pass a createaccount token
 310                 if ( !$this->mToken ) {
 311                         $this->mainLoginForm( $this->msg( 'sessionfailure' )->text() );
 312                         return false;
 313                 }
 314
 315                 # Validate the createaccount token
 316                 if ( $this->mToken !== self::getCreateaccountToken() ) {
 317                         $this->mainLoginForm( $this->msg( 'sessionfailure' )->text() );
 318                         return false;
 319                 }
 320
 321                 # Check permissions
 322                 $currentUser = $this->getUser();
 323                 if ( !$currentUser->isAllowed( 'createaccount' ) ) {
 324                         throw new PermissionsError( 'createaccount' );
 325                 } elseif ( $currentUser->isBlockedFromCreateAccount() ) {
 326                         $this->userBlockedMessage( $currentUser->isBlockedFromCreateAccount() );
 327                         return false;
 328                 }
 329
 330                 # Include checks that will include GlobalBlocking (Bug 38333)
 331                 $permErrors = $this->getTitle()->getUserPermissionsErrors( 'createaccount', $currentUser, true );
 332                 if ( count( $permErrors ) ) {
 333                                 throw new PermissionsError( 'createaccount', $permErrors );
 334                 }
 335
 336                 $ip = $this->getRequest()->getIP();
 337                 if ( $currentUser->isDnsBlacklisted( $ip, true /* check $wgProxyWhitelist */ ) ) {
 338                         $this->mainLoginForm( $this->msg( 'sorbs_create_account_reason' )->text() . ' ' . $this->msg( 'parentheses', $ip )->escaped() );
 339                         return false;
 340                 }
 341
 342                 # Now create a dummy user ($u) and check if it is valid
 343                 $name = trim( $this->mUsername );
 344                 $u = User::newFromName( $name, 'creatable' );
 345                 if ( !is_object( $u ) ) {
 346                         $this->mainLoginForm( $this->msg( 'noname' )->text() );
 347                         return false;
 348                 }
 349
 350                 if ( 0 != $u->idForName() ) {
 351                         $this->mainLoginForm( $this->msg( 'userexists' )->text() );
 352                         return false;
 353                 }
 354
 355                 if ( 0 != strcmp( $this->mPassword, $this->mRetype ) ) {
 356                         $this->mainLoginForm( $this->msg( 'badretype' )->text() );
 357                         return false;
 358                 }
 359
 360                 # check for minimal password length
 361                 $valid = $u->getPasswordValidity( $this->mPassword );
 362                 if ( $valid !== true ) {
 363                         if ( !$this->mCreateaccountMail ) {
 364                                 if ( is_array( $valid ) ) {
 365                                         $message = array_shift( $valid );
 366                                         $params = $valid;
 367                                 } else {
 368                                         $message = $valid;
 369                                         $params = array( $wgMinimalPasswordLength );
 370                                 }
 371                                 $this->mainLoginForm( $this->msg( $message, $params )->text() );
 372                                 return false;
 373                         } else {
 374                                 # do not force a password for account creation by email
 375                                 # set invalid password, it will be replaced later by a random generated password
 376                                 $this->mPassword = null;
 377                         }
 378                 }
 379
 380                 # if you need a confirmed email address to edit, then obviously you
 381                 # need an email address.
 382                 if ( $wgEmailConfirmToEdit && empty( $this->mEmail ) ) {
 383                         $this->mainLoginForm( $this->msg( 'noemailtitle' )->text() );
 384                         return false;
 385                 }
 386
 387                 if( !empty( $this->mEmail ) && !Sanitizer::validateEmail( $this->mEmail ) ) {
 388                         $this->mainLoginForm( $this->msg( 'invalidemailaddress' )->text() );
 389                         return false;
 390                 }
 391
 392                 # Set some additional data so the AbortNewAccount hook can be used for
 393                 # more than just username validation
 394                 $u->setEmail( $this->mEmail );
 395                 $u->setRealName( $this->mRealName );
 396
 397                 $abortError = '';
 398                 if( !wfRunHooks( 'AbortNewAccount', array( $u, &$abortError ) ) ) {
 399                         // Hook point to add extra creation throttles and blocks
 400                         wfDebug( "LoginForm::addNewAccountInternal: a hook blocked creation\n" );
 401                         $this->mainLoginForm( $abortError );
 402                         return false;
 403                 }
 404
 405                 // Hook point to check for exempt from account creation throttle
 406                 if ( !wfRunHooks( 'ExemptFromAccountCreationThrottle', array( $ip ) ) ) {
 407                         wfDebug( "LoginForm::exemptFromAccountCreationThrottle: a hook allowed account creation w/o throttle\n" );
 408                 } else {
 409                         if ( ( $wgAccountCreationThrottle && $currentUser->isPingLimitable() ) ) {
 410                                 $key = wfMemcKey( 'acctcreate', 'ip', $ip );
 411                                 $value = $wgMemc->get( $key );
 412                                 if ( !$value ) {
 413                                         $wgMemc->set( $key, 0, 86400 );
 414                                 }
 415                                 if ( $value >= $wgAccountCreationThrottle ) {
 416                                         $this->throttleHit( $wgAccountCreationThrottle );
 417                                         return false;
 418                                 }
 419                                 $wgMemc->incr( $key );
 420                         }
 421                 }
 422
 423                 if( !$wgAuth->addUser( $u, $this->mPassword, $this->mEmail, $this->mRealName ) ) {
 424                         $this->mainLoginForm( $this->msg( 'externaldberror' )->text() );
 425                         return false;
 426                 }
 427
 428                 self::clearCreateaccountToken();
 429                 return $this->initUser( $u, false );
 430         }
 431
 432         /**
 433          * Actually add a user to the database.
 434          * Give it a User object that has been initialised with a name.
 435          *
 436          * @param $u User object.
 437          * @param $autocreate boolean -- true if this is an autocreation via auth plugin
 438          * @return User object.
 439          * @private
 440          */
 441         function initUser( $u, $autocreate ) {
 442                 global $wgAuth;
 443
 444                 $u->addToDatabase();
 445
 446                 if ( $wgAuth->allowPasswordChange() ) {
 447                         $u->setPassword( $this->mPassword );
 448                 }
 449
 450                 $u->setEmail( $this->mEmail );
 451                 $u->setRealName( $this->mRealName );
 452                 $u->setToken();
 453
 454                 $wgAuth->initUser( $u, $autocreate );
 455
 456                 if ( $this->mExtUser ) {
 457                         $this->mExtUser->linkToLocal( $u->getId() );
 458                         $email = $this->mExtUser->getPref( 'emailaddress' );
 459                         if ( $email && !$this->mEmail ) {
 460                                 $u->setEmail( $email );
 461                         }
 462                 }
 463
 464                 $u->setOption( 'rememberpassword', $this->mRemember ? 1 : 0 );
 465                 $u->saveSettings();
 466
 467                 # Update user count
 468                 $ssUpdate = new SiteStatsUpdate( 0, 0, 0, 0, 1 );
 469                 $ssUpdate->doUpdate();
 470
 471                 return $u;
 472         }
 473
 474         /**
 475          * Internally authenticate the login request.
 476          *
 477          * This may create a local account as a side effect if the
 478          * authentication plugin allows transparent local account
 479          * creation.
 480          * @return int
 481          */
 482         public function authenticateUserData() {
 483                 global $wgUser, $wgAuth;
 484
 485                 $this->load();
 486
 487                 if ( $this->mUsername == '' ) {
 488                         return self::NO_NAME;
 489                 }
 490
 491                 // We require a login token to prevent login CSRF
 492                 // Handle part of this before incrementing the throttle so
 493                 // token-less login attempts don't count towards the throttle
 494                 // but wrong-token attempts do.
 495
 496                 // If the user doesn't have a login token yet, set one.
 497                 if ( !self::getLoginToken() ) {
 498                         self::setLoginToken();
 499                         return self::NEED_TOKEN;
 500                 }
 501                 // If the user didn't pass a login token, tell them we need one
 502                 if ( !$this->mToken ) {
 503                         return self::NEED_TOKEN;
 504                 }
 505
 506                 $throttleCount = self::incLoginThrottle( $this->mUsername );
 507                 if ( $throttleCount === true ) {
 508                         return self::THROTTLED;
 509                 }
 510
 511                 // Validate the login token
 512                 if ( $this->mToken !== self::getLoginToken() ) {
 513                         return self::WRONG_TOKEN;
 514                 }
 515
 516                 // Load the current user now, and check to see if we're logging in as
 517                 // the same name. This is necessary because loading the current user
 518                 // (say by calling getName()) calls the UserLoadFromSession hook, which
 519                 // potentially creates the user in the database. Until we load $wgUser,
 520                 // checking for user existence using User::newFromName($name)->getId() below
 521                 // will effectively be using stale data.
 522                 if ( $this->getUser()->getName() === $this->mUsername ) {
 523                         wfDebug( __METHOD__ . ": already logged in as {$this->mUsername}\n" );
 524                         return self::SUCCESS;
 525                 }
 526
 527                 $this->mExtUser = ExternalUser::newFromName( $this->mUsername );
 528
 529                 # TODO: Allow some magic here for invalid external names, e.g., let the
 530                 # user choose a different wiki name.
 531                 $u = User::newFromName( $this->mUsername );
 532                 if( !( $u instanceof User ) || !User::isUsableName( $u->getName() ) ) {
 533                         return self::ILLEGAL;
 534                 }
 535
 536                 $isAutoCreated = false;
 537                 if ( 0 == $u->getID() ) {
 538                         $status = $this->attemptAutoCreate( $u );
 539                         if ( $status !== self::SUCCESS ) {
 540                                 return $status;
 541                         } else {
 542                                 $isAutoCreated = true;
 543                         }
 544                 } else {
 545                         global $wgExternalAuthType, $wgAutocreatePolicy;
 546                         if ( $wgExternalAuthType && $wgAutocreatePolicy != 'never'
 547                         && is_object( $this->mExtUser )
 548                         && $this->mExtUser->authenticate( $this->mPassword ) ) {
 549                                 # The external user and local user have the same name and
 550                                 # password, so we assume they're the same.
 551                                 $this->mExtUser->linkToLocal( $u->getID() );
 552                         }
 553
 554                         $u->load();
 555                 }
 556
 557                 // Give general extensions, such as a captcha, a chance to abort logins
 558                 $abort = self::ABORTED;
 559                 if( !wfRunHooks( 'AbortLogin', array( $u, $this->mPassword, &$abort, &$this->mAbortLoginErrorMsg ) ) ) {
 560                         return $abort;
 561                 }
 562
 563                 global $wgBlockDisablesLogin;
 564                 if ( !$u->checkPassword( $this->mPassword ) ) {
 565                         if( $u->checkTemporaryPassword( $this->mPassword ) ) {
 566                                 // The e-mailed temporary password should not be used for actu-
 567                                 // al logins; that's a very sloppy habit, and insecure if an
 568                                 // attacker has a few seconds to click "search" on someone's o-
 569                                 // pen mail reader.
 570                                 //
 571                                 // Allow it to be used only to reset the password a single time
 572                                 // to a new value, which won't be in the user's e-mail ar-
 573                                 // chives.
 574                                 //
 575                                 // For backwards compatibility, we'll still recognize it at the
 576                                 // login form to minimize surprises for people who have been
 577                                 // logging in with a temporary password for some time.
 578                                 //
 579                                 // As a side-effect, we can authenticate the user's e-mail ad-
 580                                 // dress if it's not already done, since the temporary password
 581                                 // was sent via e-mail.
 582                                 if( !$u->isEmailConfirmed() ) {
 583                                         $u->confirmEmail();
 584                                         $u->saveSettings();
 585                                 }
 586
 587                                 // At this point we just return an appropriate code/ indicating
 588                                 // that the UI should show a password reset form; bot inter-
 589                                 // faces etc will probably just fail cleanly here.
 590                                 $retval = self::RESET_PASS;
 591                         } else {
 592                                 $retval = ( $this->mPassword  == '' ) ? self::EMPTY_PASS : self::WRONG_PASS;
 593                         }
 594                 } elseif ( $wgBlockDisablesLogin && $u->isBlocked() ) {
 595                         // If we've enabled it, make it so that a blocked user cannot login
 596                         $retval = self::USER_BLOCKED;
 597                 } else {
 598                         $wgAuth->updateUser( $u );
 599                         $wgUser = $u;
 600                         // This should set it for OutputPage and the Skin
 601                         // which is needed or the personal links will be
 602                         // wrong.
 603                         $this->getContext()->setUser( $u );
 604
 605                         // Please reset throttle for successful logins, thanks!
 606                         if ( $throttleCount ) {
 607                                 self::clearLoginThrottle( $this->mUsername );
 608                         }
 609
 610                         if ( $isAutoCreated ) {
 611                                 // Must be run after $wgUser is set, for correct new user log
 612                                 wfRunHooks( 'AuthPluginAutoCreate', array( $u ) );
 613                         }
 614
 615                         $retval = self::SUCCESS;
 616                 }
 617                 wfRunHooks( 'LoginAuthenticateAudit', array( $u, $this->mPassword, $retval ) );
 618                 return $retval;
 619         }
 620
 621         /**
 622          * Increment the login attempt throttle hit count for the (username,current IP)
 623          * tuple unless the throttle was already reached.
 624          * @param $username string The user name
 625          * @return Bool|Integer The integer hit count or True if it is already at the limit
 626          */
 627         public static function incLoginThrottle( $username ) {
 628                 global $wgPasswordAttemptThrottle, $wgMemc, $wgRequest;
 629                 $username = trim( $username ); // sanity
 630
 631                 $throttleCount = 0;
 632                 if ( is_array( $wgPasswordAttemptThrottle ) ) {
 633                         $throttleKey = wfMemcKey( 'password-throttle', $wgRequest->getIP(), md5( $username ) );
 634                         $count = $wgPasswordAttemptThrottle['count'];
 635                         $period = $wgPasswordAttemptThrottle['seconds'];
 636
 637                         $throttleCount = $wgMemc->get( $throttleKey );
 638                         if ( !$throttleCount ) {
 639                                 $wgMemc->add( $throttleKey, 1, $period ); // start counter
 640                         } elseif ( $throttleCount < $count ) {
 641                                 $wgMemc->incr( $throttleKey );
 642                         } elseif ( $throttleCount >= $count ) {
 643                                 return true;
 644                         }
 645                 }
 646
 647                 return $throttleCount;
 648         }
 649
 650         /**
 651          * Clear the login attempt throttle hit count for the (username,current IP) tuple.
 652          * @param $username string The user name
 653          * @return void
 654          */
 655         public static function clearLoginThrottle( $username ) {
 656                 global $wgMemc, $wgRequest;
 657                 $username = trim( $username ); // sanity
 658
 659                 $throttleKey = wfMemcKey( 'password-throttle', $wgRequest->getIP(), md5( $username ) );
 660                 $wgMemc->delete( $throttleKey );
 661         }
 662
 663         /**
 664          * Attempt to automatically create a user on login. Only succeeds if there
 665          * is an external authentication method which allows it.
 666          *
 667          * @param $user User
 668          *
 669          * @return integer Status code
 670          */
 671         function attemptAutoCreate( $user ) {
 672                 global $wgAuth, $wgAutocreatePolicy;
 673
 674                 if ( $this->getUser()->isBlockedFromCreateAccount() ) {
 675                         wfDebug( __METHOD__ . ": user is blocked from account creation\n" );
 676                         return self::CREATE_BLOCKED;
 677                 }
 678
 679                 /**
 680                  * If the external authentication plugin allows it, automatically cre-
 681                  * ate a new account for users that are externally defined but have not
 682                  * yet logged in.
 683                  */
 684                 if ( $this->mExtUser ) {
 685                         # mExtUser is neither null nor false, so use the new ExternalAuth
 686                         # system.
 687                         if ( $wgAutocreatePolicy == 'never' ) {
 688                                 return self::NOT_EXISTS;
 689                         }
 690                         if ( !$this->mExtUser->authenticate( $this->mPassword ) ) {
 691                                 return self::WRONG_PLUGIN_PASS;
 692                         }
 693                 } else {
 694                         # Old AuthPlugin.
 695                         if ( !$wgAuth->autoCreate() ) {
 696                                 return self::NOT_EXISTS;
 697                         }
 698                         if ( !$wgAuth->userExists( $user->getName() ) ) {
 699                                 wfDebug( __METHOD__ . ": user does not exist\n" );
 700                                 return self::NOT_EXISTS;
 701                         }
 702                         if ( !$wgAuth->authenticate( $user->getName(), $this->mPassword ) ) {
 703                                 wfDebug( __METHOD__ . ": \$wgAuth->authenticate() returned false, aborting\n" );
 704                                 return self::WRONG_PLUGIN_PASS;
 705                         }
 706                 }
 707
 708                 $abortError = '';
 709                 if( !wfRunHooks( 'AbortAutoAccount', array( $user, &$abortError ) ) ) {
 710                         // Hook point to add extra creation throttles and blocks
 711                         wfDebug( "LoginForm::attemptAutoCreate: a hook blocked creation: $abortError\n" );
 712                         $this->mAbortLoginErrorMsg = $abortError;
 713                         return self::ABORTED;
 714                 }
 715
 716                 wfDebug( __METHOD__ . ": creating account\n" );
 717                 $this->initUser( $user, true );
 718                 return self::SUCCESS;
 719         }
 720
 721         function processLogin() {
 722                 global $wgMemc, $wgLang;
 723
 724                 switch ( $this->authenticateUserData() ) {
 725                         case self::SUCCESS:
 726                                 # We've verified now, update the real record
 727                                 $user = $this->getUser();
 728                                 if( (bool)$this->mRemember != (bool)$user->getOption( 'rememberpassword' ) ) {
 729                                         $user->setOption( 'rememberpassword', $this->mRemember ? 1 : 0 );
 730                                         $user->saveSettings();
 731                                 } else {
 732                                         $user->invalidateCache();
 733                                 }
 734                                 $user->setCookies();
 735                                 self::clearLoginToken();
 736
 737                                 // Reset the throttle
 738                                 $request = $this->getRequest();
 739                                 $key = wfMemcKey( 'password-throttle', $request->getIP(), md5( $this->mUsername ) );
 740                                 $wgMemc->delete( $key );
 741
 742                                 if( $this->hasSessionCookie() || $this->mSkipCookieCheck ) {
 743                                         /* Replace the language object to provide user interface in
 744                                          * correct language immediately on this first page load.
 745                                          */
 746                                         $code = $request->getVal( 'uselang', $user->getOption( 'language' ) );
 747                                         $userLang = Language::factory( $code );
 748                                         $wgLang = $userLang;
 749                                         $this->getContext()->setLanguage( $userLang );
 750                                         $this->successfulLogin();
 751                                 } else {
 752                                         $this->cookieRedirectCheck( 'login' );
 753                                 }
 754                                 break;
 755
 756                         case self::NEED_TOKEN:
 757                                 $this->mainLoginForm( $this->msg( 'nocookiesforlogin' )->parse() );
 758                                 break;
 759                         case self::WRONG_TOKEN:
 760                                 $this->mainLoginForm( $this->msg( 'sessionfailure' )->text() );
 761                                 break;
 762                         case self::NO_NAME:
 763                         case self::ILLEGAL:
 764                                 $this->mainLoginForm( $this->msg( 'noname' )->text() );
 765                                 break;
 766                         case self::WRONG_PLUGIN_PASS:
 767                                 $this->mainLoginForm( $this->msg( 'wrongpassword' )->text() );
 768                                 break;
 769                         case self::NOT_EXISTS:
 770                                 if( $this->getUser()->isAllowed( 'createaccount' ) ) {
 771                                         $this->mainLoginForm( $this->msg( 'nosuchuser',
 772                                                 wfEscapeWikiText( $this->mUsername ) )->parse() );
 773                                 } else {
 774                                         $this->mainLoginForm( $this->msg( 'nosuchusershort',
 775                                                 wfEscapeWikiText( $this->mUsername ) )->text() );
 776                                 }
 777                                 break;
 778                         case self::WRONG_PASS:
 779                                 $this->mainLoginForm( $this->msg( 'wrongpassword' )->text() );
 780                                 break;
 781                         case self::EMPTY_PASS:
 782                                 $this->mainLoginForm( $this->msg( 'wrongpasswordempty' )->text() );
 783                                 break;
 784                         case self::RESET_PASS:
 785                                 $this->resetLoginForm( $this->msg( 'resetpass_announce' )->text() );
 786                                 break;
 787                         case self::CREATE_BLOCKED:
 788                                 $this->userBlockedMessage( $this->getUser()->mBlock );
 789                                 break;
 790                         case self::THROTTLED:
 791                                 $this->mainLoginForm( $this->msg( 'login-throttled' )->text() );
 792                                 break;
 793                         case self::USER_BLOCKED:
 794                                 $this->mainLoginForm( $this->msg( 'login-userblocked',
 795                                         $this->mUsername )->escaped() );
 796                                 break;
 797                         case self::ABORTED:
 798                                 $this->mainLoginForm( $this->msg( $this->mAbortLoginErrorMsg )->text() );
 799                                 break;
 800                         default:
 801                                 throw new MWException( 'Unhandled case value' );
 802                 }
 803         }
 804
 805         function resetLoginForm( $error ) {
 806                 $this->getOutput()->addHTML( Xml::element('p', array( 'class' => 'error' ), $error ) );
 807                 $reset = new SpecialChangePassword();
 808                 $reset->setContext( $this->getContext() );
 809                 $reset->execute( null );
 810         }
 811
 812         /**
 813          * @param $u User object
 814          * @param $throttle Boolean
 815          * @param $emailTitle String: message name of email title
 816          * @param $emailText String: message name of email text
 817          * @return Status object
 818          */
 819         function mailPasswordInternal( $u, $throttle = true, $emailTitle = 'passwordremindertitle', $emailText = 'passwordremindertext' ) {
 820                 global $wgServer, $wgScript, $wgNewPasswordExpiry;
 821
 822                 if ( $u->getEmail() == '' ) {
 823                         return Status::newFatal( 'noemail', $u->getName() );
 824                 }
 825                 $ip = $this->getRequest()->getIP();
 826                 if( !$ip ) {
 827                         return Status::newFatal( 'badipaddress' );
 828                 }
 829
 830                 $currentUser = $this->getUser();
 831                 wfRunHooks( 'User::mailPasswordInternal', array( &$currentUser, &$ip, &$u ) );
 832
 833                 $np = $u->randomPassword();
 834                 $u->setNewpassword( $np, $throttle );
 835                 $u->saveSettings();
 836                 $userLanguage = $u->getOption( 'language' );
 837                 $m = $this->msg( $emailText, $ip, $u->getName(), $np, $wgServer . $wgScript,
 838                         round( $wgNewPasswordExpiry / 86400 ) )->inLanguage( $userLanguage )->text();
 839                 $result = $u->sendMail( $this->msg( $emailTitle )->inLanguage( $userLanguage )->text(), $m );
 840
 841                 return $result;
 842         }
 843
 844
 845         /**
 846          * Run any hooks registered for logins, then HTTP redirect to
 847          * $this->mReturnTo (or Main Page if that's undefined).  Formerly we had a
 848          * nice message here, but that's really not as useful as just being sent to
 849          * wherever you logged in from.  It should be clear that the action was
 850          * successful, given the lack of error messages plus the appearance of your
 851          * name in the upper right.
 852          *
 853          * @private
 854          */
 855         function successfulLogin() {
 856                 # Run any hooks; display injected HTML if any, else redirect
 857                 $currentUser = $this->getUser();
 858                 $injected_html = '';
 859                 wfRunHooks( 'UserLoginComplete', array( &$currentUser, &$injected_html ) );
 860
 861                 if( $injected_html !== '' ) {
 862                         $this->displaySuccessfulLogin( 'loginsuccess', $injected_html );
 863                 } else {
 864                         $this->executeReturnTo( 'successredirect' );
 865                 }
 866         }
 867
 868         /**
 869          * Run any hooks registered for logins, then display a message welcoming
 870          * the user.
 871          *
 872          * @private
 873          */
 874         function successfulCreation() {
 875                 # Run any hooks; display injected HTML
 876                 $currentUser = $this->getUser();
 877                 $injected_html = '';
 878                 $welcome_creation_msg = 'welcomecreation';
 879
 880                 wfRunHooks( 'UserLoginComplete', array( &$currentUser, &$injected_html ) );
 881
 882                 /**
 883                  * Let any extensions change what message is shown.
 884                  * @see https://www.mediawiki.org/wiki/Manual:Hooks/BeforeWelcomeCreation
 885                  * @since 1.18
 886                  */
 887                 wfRunHooks( 'BeforeWelcomeCreation', array( &$welcome_creation_msg, &$injected_html ) );
 888
 889                 $this->displaySuccessfulLogin( $welcome_creation_msg, $injected_html );
 890         }
 891
 892         /**
 893          * Display a "login successful" page.
 894          * @param $msgname string
 895          * @param $injected_html string
 896          */
 897         private function displaySuccessfulLogin( $msgname, $injected_html ) {
 898                 $out = $this->getOutput();
 899                 $out->setPageTitle( $this->msg( 'loginsuccesstitle' ) );
 900                 if( $msgname ){
 901                         $out->addWikiMsg( $msgname, wfEscapeWikiText( $this->getUser()->getName() ) );
 902                 }
 903
 904                 $out->addHTML( $injected_html );
 905
 906                 $this->executeReturnTo( 'success' );
 907         }
 908
 909         /**
 910          * Output a message that informs the user that they cannot create an account because
 911          * there is a block on them or their IP which prevents account creation.  Note that
 912          * User::isBlockedFromCreateAccount(), which gets this block, ignores the 'hardblock'
 913          * setting on blocks (bug 13611).
 914          * @param $block Block the block causing this error
 915          */
 916         function userBlockedMessage( Block $block ) {
 917                 # Let's be nice about this, it's likely that this feature will be used
 918                 # for blocking large numbers of innocent people, e.g. range blocks on
 919                 # schools. Don't blame it on the user. There's a small chance that it
 920                 # really is the user's fault, i.e. the username is blocked and they
 921                 # haven't bothered to log out before trying to create an account to
 922                 # evade it, but we'll leave that to their guilty conscience to figure
 923                 # out.
 924
 925                 $out = $this->getOutput();
 926                 $out->setPageTitle( $this->msg( 'cantcreateaccounttitle' ) );
 927
 928                 $block_reason = $block->mReason;
 929                 if ( strval( $block_reason ) === '' ) {
 930                         $block_reason = $this->msg( 'blockednoreason' )->text();
 931                 }
 932
 933                 $out->addWikiMsg(
 934                         'cantcreateaccount-text',
 935                         $block->getTarget(),
 936                         $block_reason,
 937                         $block->getByName()
 938                 );
 939
 940                 $this->executeReturnTo( 'error' );
 941         }
 942
 943         /**
 944          * Add a "return to" link or redirect to it.
 945          *
 946          * @param $type string, one of the following:
 947          *    - error: display a return to link ignoring $wgRedirectOnLogin
 948          *    - success: display a return to link using $wgRedirectOnLogin if needed
 949          *    - successredirect: send an HTTP redirect using $wgRedirectOnLogin if needed
 950          */
 951         private function executeReturnTo( $type ) {
 952                 global $wgRedirectOnLogin, $wgSecureLogin;
 953
 954                 if ( $type != 'error' && $wgRedirectOnLogin !== null ) {
 955                         $returnTo = $wgRedirectOnLogin;
 956                         $returnToQuery = array();
 957                 } else {
 958                         $returnTo = $this->mReturnTo;
 959                         $returnToQuery = wfCgiToArray( $this->mReturnToQuery );
 960                 }
 961
 962                 $returnToTitle = Title::newFromText( $returnTo );
 963                 if ( !$returnToTitle ) {
 964                         $returnToTitle = Title::newMainPage();
 965                 }
 966
 967                 if ( $type == 'successredirect' ) {
 968                         $redirectUrl = $returnToTitle->getFullURL( $returnToQuery );
 969                         if( $wgSecureLogin && !$this->mStickHTTPS ) {
 970                                 $redirectUrl = preg_replace( '/^https:/', 'http:', $redirectUrl );
 971                         }
 972                         $this->getOutput()->redirect( $redirectUrl );
 973                 } else {
 974                         $this->getOutput()->addReturnTo( $returnToTitle, $returnToQuery );
 975                 }
 976         }
 977
 978         /**
 979          * @private
 980          */
 981         function mainLoginForm( $msg, $msgtype = 'error' ) {
 982                 global $wgEnableEmail, $wgEnableUserEmail;
 983                 global $wgHiddenPrefs, $wgLoginLanguageSelector;
 984                 global $wgAuth, $wgEmailConfirmToEdit, $wgCookieExpiration;
 985                 global $wgSecureLogin, $wgPasswordResetRoutes;
 986
 987                 $titleObj = $this->getTitle();
 988                 $user = $this->getUser();
 989
 990                 if ( $this->mType == 'signup' ) {
 991                         // Block signup here if in readonly. Keeps user from
 992                         // going through the process (filling out data, etc)
 993                         // and being informed later.
 994                         $permErrors = $titleObj->getUserPermissionsErrors( 'createaccount', $user, true );
 995                         if ( count( $permErrors ) ) {
 996                                 throw new PermissionsError( 'createaccount', $permErrors );
 997                         } elseif ( $user->isBlockedFromCreateAccount() ) {
 998                                 $this->userBlockedMessage( $user->isBlockedFromCreateAccount() );
 999                                 return;
1000                         } elseif ( wfReadOnly() ) {
1001                                 throw new ReadOnlyError;
1002                         }
1003                 }
1004
1005                 if ( $this->mUsername == '' ) {
1006                         if ( $user->isLoggedIn() ) {
1007                                 $this->mUsername = $user->getName();
1008                         } else {
1009                                 $this->mUsername = $this->getRequest()->getCookie( 'UserName' );
1010                         }
1011                 }
1012
1013                 if ( $this->mType == 'signup' ) {
1014                         $template = new UsercreateTemplate();
1015                         $q = 'action=submitlogin&type=signup';
1016                         $linkq = 'type=login';
1017                         $linkmsg = 'gotaccount';
1018                 } else {
1019                         $template = new UserloginTemplate();
1020                         $q = 'action=submitlogin&type=login';
1021                         $linkq = 'type=signup';
1022                         $linkmsg = 'nologin';
1023                 }
1024
1025                 if ( $this->mReturnTo !== '' ) {
1026                         $returnto = '&returnto=' . wfUrlencode( $this->mReturnTo );
1027                         if ( $this->mReturnToQuery !== '' ) {
1028                                 $returnto .= '&returntoquery=' .
1029                                         wfUrlencode( $this->mReturnToQuery );
1030                         }
1031                         $q .= $returnto;
1032                         $linkq .= $returnto;
1033                 }
1034
1035                 # Don't show a "create account" link if the user can't
1036                 if( $this->showCreateOrLoginLink( $user ) ) {
1037                         # Pass any language selection on to the mode switch link
1038                         if( $wgLoginLanguageSelector && $this->mLanguage ) {
1039                                 $linkq .= '&uselang=' . $this->mLanguage;
1040                         }
1041                         $link = Html::element( 'a', array( 'href' => $titleObj->getLocalURL( $linkq ) ),
1042                                 $this->msg( $linkmsg . 'link' )->text() ); # Calling either 'gotaccountlink' or 'nologinlink'
1043
1044                         $template->set( 'link', $this->msg( $linkmsg )->rawParams( $link )->parse() );
1045                 } else {
1046                         $template->set( 'link', '' );
1047                 }
1048
1049                 $resetLink = $this->mType == 'signup'
1050                         ? null
1051                         : is_array( $wgPasswordResetRoutes ) && in_array( true, array_values( $wgPasswordResetRoutes ) );
1052
1053                 $template->set( 'header', '' );
1054                 $template->set( 'name', $this->mUsername );
1055                 $template->set( 'password', $this->mPassword );
1056                 $template->set( 'retype', $this->mRetype );
1057                 $template->set( 'email', $this->mEmail );
1058                 $template->set( 'realname', $this->mRealName );
1059                 $template->set( 'domain', $this->mDomain );
1060                 $template->set( 'reason', $this->mReason );
1061
1062                 $template->set( 'action', $titleObj->getLocalURL( $q ) );
1063                 $template->set( 'message', $msg );
1064                 $template->set( 'messagetype', $msgtype );
1065                 $template->set( 'createemail', $wgEnableEmail && $user->isLoggedIn() );
1066                 $template->set( 'userealname', !in_array( 'realname', $wgHiddenPrefs ) );
1067                 $template->set( 'useemail', $wgEnableEmail );
1068                 $template->set( 'emailrequired', $wgEmailConfirmToEdit );
1069                 $template->set( 'emailothers', $wgEnableUserEmail );
1070                 $template->set( 'canreset', $wgAuth->allowPasswordChange() );
1071                 $template->set( 'resetlink', $resetLink );
1072                 $template->set( 'canremember', ( $wgCookieExpiration > 0 ) );
1073                 $template->set( 'usereason', $user->isLoggedIn() );
1074                 $template->set( 'remember', $user->getOption( 'rememberpassword' ) || $this->mRemember );
1075                 $template->set( 'cansecurelogin', ( $wgSecureLogin === true ) );
1076                 $template->set( 'stickHTTPS', $this->mStickHTTPS );
1077
1078                 if ( $this->mType == 'signup' ) {
1079                         if ( !self::getCreateaccountToken() ) {
1080                                 self::setCreateaccountToken();
1081                         }
1082                         $template->set( 'token', self::getCreateaccountToken() );
1083                 } else {
1084                         if ( !self::getLoginToken() ) {
1085                                 self::setLoginToken();
1086                         }
1087                         $template->set( 'token', self::getLoginToken() );
1088                 }
1089
1090                 # Prepare language selection links as needed
1091                 if( $wgLoginLanguageSelector ) {
1092                         $template->set( 'languages', $this->makeLanguageSelector() );
1093                         if( $this->mLanguage ) {
1094                                 $template->set( 'uselang', $this->mLanguage );
1095                         }
1096                 }
1097
1098                 // Use loginend-https for HTTPS requests if it's not blank, loginend otherwise
1099                 // Ditto for signupend
1100                 $usingHTTPS = WebRequest::detectProtocol() == 'https';
1101                 $loginendHTTPS = $this->msg( 'loginend-https' );
1102                 $signupendHTTPS = $this->msg( 'signupend-https' );
1103                 if ( $usingHTTPS && !$loginendHTTPS->isBlank() ) {
1104                         $template->set( 'loginend', $loginendHTTPS->parse() );
1105                 } else {
1106                         $template->set( 'loginend', $this->msg( 'loginend' )->parse() );
1107                 }
1108                 if ( $usingHTTPS && !$signupendHTTPS->isBlank() ) {
1109                         $template->set( 'signupend', $signupendHTTPS->parse() );
1110                 } else {
1111                         $template->set( 'signupend', $this->msg( 'signupend' )->parse() );
1112                 }
1113
1114                 // Give authentication and captcha plugins a chance to modify the form
1115                 $wgAuth->modifyUITemplate( $template, $this->mType );
1116                 if ( $this->mType == 'signup' ) {
1117                         wfRunHooks( 'UserCreateForm', array( &$template ) );
1118                 } else {
1119                         wfRunHooks( 'UserLoginForm', array( &$template ) );
1120                 }
1121
1122                 $out = $this->getOutput();
1123                 $out->disallowUserJs(); // just in case...
1124                 $out->addTemplate( $template );
1125         }
1126
1127         /**
1128          * @private
1129          *
1130          * @param $user User
1131          *
1132          * @return Boolean
1133          */
1134         function showCreateOrLoginLink( &$user ) {
1135                 if( $this->mType == 'signup' ) {
1136                         return true;
1137                 } elseif( $user->isAllowed( 'createaccount' ) ) {
1138                         return true;
1139                 } else {
1140                         return false;
1141                 }
1142         }
1143
1144         /**
1145          * Check if a session cookie is present.
1146          *
1147          * This will not pick up a cookie set during _this_ request, but is meant
1148          * to ensure that the client is returning the cookie which was set on a
1149          * previous pass through the system.
1150          *
1151          * @private
1152          * @return bool
1153          */
1154         function hasSessionCookie() {
1155                 global $wgDisableCookieCheck;
1156                 return $wgDisableCookieCheck ? true : $this->getRequest()->checkSessionCookie();
1157         }
1158
1159         /**
1160          * Get the login token from the current session
1161          * @return Mixed
1162          */
1163         public static function getLoginToken() {
1164                 global $wgRequest;
1165                 return $wgRequest->getSessionData( 'wsLoginToken' );
1166         }
1167
1168         /**
1169          * Randomly generate a new login token and attach it to the current session
1170          */
1171         public static function setLoginToken() {
1172                 global $wgRequest;
1173                 // Generate a token directly instead of using $user->editToken()
1174                 // because the latter reuses $_SESSION['wsEditToken']
1175                 $wgRequest->setSessionData( 'wsLoginToken', MWCryptRand::generateHex( 32 ) );
1176         }
1177
1178         /**
1179          * Remove any login token attached to the current session
1180          */
1181         public static function clearLoginToken() {
1182                 global $wgRequest;
1183                 $wgRequest->setSessionData( 'wsLoginToken', null );
1184         }
1185
1186         /**
1187          * Get the createaccount token from the current session
1188          * @return Mixed
1189          */
1190         public static function getCreateaccountToken() {
1191                 global $wgRequest;
1192                 return $wgRequest->getSessionData( 'wsCreateaccountToken' );
1193         }
1194
1195         /**
1196          * Randomly generate a new createaccount token and attach it to the current session
1197          */
1198         public static function setCreateaccountToken() {
1199                 global $wgRequest;
1200                 $wgRequest->setSessionData( 'wsCreateaccountToken', MWCryptRand::generateHex( 32 ) );
1201         }
1202
1203         /**
1204          * Remove any createaccount token attached to the current session
1205          */
1206         public static function clearCreateaccountToken() {
1207                 global $wgRequest;
1208                 $wgRequest->setSessionData( 'wsCreateaccountToken', null );
1209         }
1210
1211         /**
1212          * @private
1213          */
1214         function cookieRedirectCheck( $type ) {
1215                 $titleObj = SpecialPage::getTitleFor( 'Userlogin' );
1216                 $query = array( 'wpCookieCheck' => $type );
1217                 if ( $this->mReturnTo !== '' ) {
1218                         $query['returnto'] = $this->mReturnTo;
1219                         $query['returntoquery'] = $this->mReturnToQuery;
1220                 }
1221                 $check = $titleObj->getFullURL( $query );
1222
1223                 $this->getOutput()->redirect( $check );
1224         }
1225
1226         /**
1227          * @private
1228          */
1229         function onCookieRedirectCheck( $type ) {
1230                 if ( !$this->hasSessionCookie() ) {
1231                         if ( $type == 'new' ) {
1232                                 $this->mainLoginForm( $this->msg( 'nocookiesnew' )->parse() );
1233                         } elseif ( $type == 'login' ) {
1234                                 $this->mainLoginForm( $this->msg( 'nocookieslogin' )->parse() );
1235                         } else {
1236                                 # shouldn't happen
1237                                 $this->mainLoginForm( $this->msg( 'error' )->text() );
1238                         }
1239                 } else {
1240                         $this->successfulLogin();
1241                 }
1242         }
1243
1244         /**
1245          * @private
1246          */
1247         function throttleHit( $limit ) {
1248                 $this->mainLoginForm( $this->msg( 'acct_creation_throttle_hit' )->numParams( $limit )->parse() );
1249         }
1250
1251         /**
1252          * Produce a bar of links which allow the user to select another language
1253          * during login/registration but retain "returnto"
1254          *
1255          * @return string
1256          */
1257         function makeLanguageSelector() {
1258                 $msg = $this->msg( 'loginlanguagelinks' )->inContentLanguage();
1259                 if( !$msg->isBlank() ) {
1260                         $langs = explode( "\n", $msg->text() );
1261                         $links = array();
1262                         foreach( $langs as $lang ) {
1263                                 $lang = trim( $lang, '* ' );
1264                                 $parts = explode( '|', $lang );
1265                                 if ( count( $parts ) >= 2 ) {
1266                                         $links[] = $this->makeLanguageSelectorLink( $parts[0], trim( $parts[1] ) );
1267                                 }
1268                         }
1269                         return count( $links ) > 0 ? $this->msg( 'loginlanguagelabel' )->rawParams(
1270                                 $this->getLanguage()->pipeList( $links ) )->escaped() : '';
1271                 } else {
1272                         return '';
1273                 }
1274         }
1275
1276         /**
1277          * Create a language selector link for a particular language
1278          * Links back to this page preserving type and returnto
1279          *
1280          * @param $text Link text
1281          * @param $lang Language code
1282          * @return string
1283          */
1284         function makeLanguageSelectorLink( $text, $lang ) {
1285                 if( $this->getLanguage()->getCode() == $lang ) {
1286                         // no link for currently used language
1287                         return htmlspecialchars( $text );
1288                 }
1289                 $query = array( 'uselang' => $lang );
1290                 if( $this->mType == 'signup' ) {
1291                         $query['type'] = 'signup';
1292                 }
1293                 if( $this->mReturnTo !== '' ) {
1294                         $query['returnto'] = $this->mReturnTo;
1295                         $query['returntoquery'] = $this->mReturnToQuery;
1296                 }
1297
1298                 $attr = array();
1299                 $targetLanguage = Language::factory( $lang );
1300                 $attr['lang'] = $attr['hreflang'] = $targetLanguage->getHtmlCode();
1301
1302                 return Linker::linkKnown(
1303                         $this->getTitle(),
1304                         htmlspecialchars( $text ),
1305                         $attr,
1306                         $query
1307                 );
1308         }
1309 }