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