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, $mMailmypassword;
  48         var $mLoginattempt, $mRemember, $mEmail, $mDomain, $mLanguage;
  49         var $mSkipCookieCheck, $mReturnToQuery, $mToken, $mStickHTTPS;
  50
  51         private $mExtUser = null;
  52
  53         public function __construct( $request = null ) {
  54                 parent::__construct( 'Userlogin' );
  55
  56                 if ( $request === null ) {
  57                         global $wgRequest;
  58                         $this->load( $wgRequest );
  59                 } else {
  60                         $this->load( $request );
  61                 }
  62         }
  63
  64         /**
  65          * Loader
  66          *
  67          * @param $request WebRequest object
  68          */
  69         function load( $request ) {
  70                 global $wgAuth, $wgHiddenPrefs, $wgEnableEmail, $wgRedirectOnLogin;
  71
  72                 $this->mType = $request->getText( 'type' );
  73                 $this->mUsername = $request->getText( 'wpName' );
  74                 $this->mPassword = $request->getText( 'wpPassword' );
  75                 $this->mRetype = $request->getText( 'wpRetype' );
  76                 $this->mDomain = $request->getText( 'wpDomain' );
  77                 $this->mReason = $request->getText( 'wpReason' );
  78                 $this->mReturnTo = $request->getVal( 'returnto' );
  79                 $this->mReturnToQuery = $request->getVal( 'returntoquery' );
  80                 $this->mCookieCheck = $request->getVal( 'wpCookieCheck' );
  81                 $this->mPosted = $request->wasPosted();
  82                 $this->mCreateaccount = $request->getCheck( 'wpCreateaccount' );
  83                 $this->mCreateaccountMail = $request->getCheck( 'wpCreateaccountMail' )
  84                                             && $wgEnableEmail;
  85                 $this->mMailmypassword = $request->getCheck( 'wpMailmypassword' )
  86                                          && $wgEnableEmail;
  87                 $this->mLoginattempt = $request->getCheck( 'wpLoginattempt' );
  88                 $this->mAction = $request->getVal( 'action' );
  89                 $this->mRemember = $request->getCheck( 'wpRemember' );
  90                 $this->mStickHTTPS = $request->getCheck( 'wpStickHTTPS' );
  91                 $this->mLanguage = $request->getText( 'uselang' );
  92                 $this->mSkipCookieCheck = $request->getCheck( 'wpSkipCookieCheck' );
  93                 $this->mToken = ( $this->mType == 'signup' ) ? $request->getVal( 'wpCreateaccountToken' ) : $request->getVal( 'wpLoginToken' );
  94
  95                 if ( $wgRedirectOnLogin ) {
  96                         $this->mReturnTo = $wgRedirectOnLogin;
  97                         $this->mReturnToQuery = '';
  98                 }
  99
 100                 if( $wgEnableEmail ) {
 101                         $this->mEmail = $request->getText( 'wpEmail' );
 102                 } else {
 103                         $this->mEmail = '';
 104                 }
 105                 if( !in_array( 'realname', $wgHiddenPrefs ) ) {
 106                     $this->mRealName = $request->getText( 'wpRealName' );
 107                 } else {
 108                     $this->mRealName = '';
 109                 }
 110
 111                 if( !$wgAuth->validDomain( $this->mDomain ) ) {
 112                         $this->mDomain = 'invaliddomain';
 113                 }
 114                 $wgAuth->setDomain( $this->mDomain );
 115
 116                 # When switching accounts, it sucks to get automatically logged out
 117                 $returnToTitle = Title::newFromText( $this->mReturnTo );
 118                 if( is_object( $returnToTitle ) && $returnToTitle->isSpecial( 'Userlogout' ) ) {
 119                         $this->mReturnTo = '';
 120                         $this->mReturnToQuery = '';
 121                 }
 122         }
 123
 124         public function execute( $par ) {
 125                 if ( session_id() == '' ) {
 126                         wfSetupSession();
 127                 }
 128
 129                 if ( $par == 'signup' ) { # Check for [[Special:Userlogin/signup]]
 130                         $this->mType = 'signup';
 131                 }
 132
 133                 if ( !is_null( $this->mCookieCheck ) ) {
 134                         $this->onCookieRedirectCheck( $this->mCookieCheck );
 135                         return;
 136                 } elseif( $this->mPosted ) {
 137                         if( $this->mCreateaccount ) {
 138                                 return $this->addNewAccount();
 139                         } elseif ( $this->mCreateaccountMail ) {
 140                                 return $this->addNewAccountMailPassword();
 141                         } elseif ( $this->mMailmypassword ) {
 142                                 return $this->mailPassword();
 143                         } elseif ( ( 'submitlogin' == $this->mAction ) || $this->mLoginattempt ) {
 144                                 return $this->processLogin();
 145                         }
 146                 }
 147                 $this->mainLoginForm( '' );
 148         }
 149
 150         /**
 151          * @private
 152          */
 153         function addNewAccountMailPassword() {
 154                 global $wgOut;
 155
 156                 if ( $this->mEmail == '' ) {
 157                         $this->mainLoginForm( wfMsgExt( 'noemail', array( 'parsemag', 'escape' ), $this->mUsername ) );
 158                         return;
 159                 }
 160
 161                 $u = $this->addNewaccountInternal();
 162
 163                 if ( $u == null ) {
 164                         return;
 165                 }
 166
 167                 // Wipe the initial password and mail a temporary one
 168                 $u->setPassword( null );
 169                 $u->saveSettings();
 170                 $result = $this->mailPasswordInternal( $u, false, 'createaccount-title', 'createaccount-text' );
 171
 172                 wfRunHooks( 'AddNewAccount', array( $u, true ) );
 173                 $u->addNewUserLogEntry( true, $this->mReason );
 174
 175                 $wgOut->setPageTitle( wfMsg( 'accmailtitle' ) );
 176
 177                 if( !$result->isGood() ) {
 178                         $this->mainLoginForm( wfMsg( 'mailerror', $result->getWikiText() ) );
 179                 } else {
 180                         $wgOut->addWikiMsg( 'accmailtext', $u->getName(), $u->getEmail() );
 181                         $wgOut->returnToMain( false );
 182                 }
 183         }
 184
 185         /**
 186          * @private
 187          */
 188         function addNewAccount() {
 189                 global $wgUser, $wgEmailAuthentication, $wgOut;
 190
 191                 # Create the account and abort if there's a problem doing so
 192                 $u = $this->addNewAccountInternal();
 193                 if( $u == null ) {
 194                         return;
 195                 }
 196
 197                 # If we showed up language selection links, and one was in use, be
 198                 # smart (and sensible) and save that language as the user's preference
 199                 global $wgLoginLanguageSelector;
 200                 if( $wgLoginLanguageSelector && $this->mLanguage ) {
 201                         $u->setOption( 'language', $this->mLanguage );
 202                 }
 203
 204                 # Send out an email authentication message if needed
 205                 if( $wgEmailAuthentication && User::isValidEmailAddr( $u->getEmail() ) ) {
 206                         $status = $u->sendConfirmationMail();
 207                         if( $status->isGood() ) {
 208                                 $wgOut->addWikiMsg( 'confirmemail_oncreate' );
 209                         } else {
 210                                 $wgOut->addWikiText( $status->getWikiText( 'confirmemail_sendfailed' ) );
 211                         }
 212                 }
 213
 214                 # Save settings (including confirmation token)
 215                 $u->saveSettings();
 216
 217                 # If not logged in, assume the new account as the current one and set
 218                 # session cookies then show a "welcome" message or a "need cookies"
 219                 # message as needed
 220                 if( $wgUser->isAnon() ) {
 221                         $wgUser = $u;
 222                         $wgUser->setCookies();
 223                         wfRunHooks( 'AddNewAccount', array( $wgUser, false ) );
 224                         $wgUser->addNewUserLogEntry();
 225                         if( $this->hasSessionCookie() ) {
 226                                 return $this->successfulCreation();
 227                         } else {
 228                                 return $this->cookieRedirectCheck( 'new' );
 229                         }
 230                 } else {
 231                         # Confirm that the account was created
 232                         $self = SpecialPage::getTitleFor( 'Userlogin' );
 233                         $wgOut->setPageTitle( wfMsgHtml( 'accountcreated' ) );
 234                         $wgOut->addHTML( wfMsgWikiHtml( 'accountcreatedtext', $u->getName() ) );
 235                         $wgOut->returnToMain( false, $self );
 236                         wfRunHooks( 'AddNewAccount', array( $u, false ) );
 237                         $u->addNewUserLogEntry( false, $this->mReason );
 238                         return true;
 239                 }
 240         }
 241
 242         /**
 243          * @private
 244          */
 245         function addNewAccountInternal() {
 246                 global $wgUser, $wgOut;
 247                 global $wgMemc, $wgAccountCreationThrottle;
 248                 global $wgAuth, $wgMinimalPasswordLength;
 249                 global $wgEmailConfirmToEdit;
 250
 251                 // If the user passes an invalid domain, something is fishy
 252                 if( !$wgAuth->validDomain( $this->mDomain ) ) {
 253                         $this->mainLoginForm( wfMsg( 'wrongpassword' ) );
 254                         return false;
 255                 }
 256
 257                 // If we are not allowing users to login locally, we should be checking
 258                 // to see if the user is actually able to authenticate to the authenti-
 259                 // cation server before they create an account (otherwise, they can
 260                 // create a local account and login as any domain user). We only need
 261                 // to check this for domains that aren't local.
 262                 if( 'local' != $this->mDomain && $this->mDomain != '' ) {
 263                         if( !$wgAuth->canCreateAccounts() && ( !$wgAuth->userExists( $this->mUsername ) || !$wgAuth->authenticate( $this->mUsername, $this->mPassword ) ) ) {
 264                                 $this->mainLoginForm( wfMsg( 'wrongpassword' ) );
 265                                 return false;
 266                         }
 267                 }
 268
 269                 if ( wfReadOnly() ) {
 270                         $wgOut->readOnlyPage();
 271                         return false;
 272                 }
 273
 274                 # Request forgery checks.
 275                 if ( !self::getCreateaccountToken() ) {
 276                         self::setCreateaccountToken();
 277                         $this->mainLoginForm( wfMsgExt( 'nocookiesfornew', array( 'parseinline' ) ) );
 278                         return false;
 279                 }
 280
 281                 # The user didn't pass a createaccount token
 282                 if ( !$this->mToken ) {
 283                         $this->mainLoginForm( wfMsg( 'sessionfailure' ) );
 284                         return false;
 285                 }
 286
 287                 # Validate the createaccount token
 288                 if ( $this->mToken !== self::getCreateaccountToken() ) {
 289                         $this->mainLoginForm( wfMsg( 'sessionfailure' ) );
 290                         return false;
 291                 }
 292
 293                 # Check permissions
 294                 if ( !$wgUser->isAllowed( 'createaccount' ) ) {
 295                         $wgOut->permissionRequired( 'createaccount' );
 296                         return false;
 297                 } elseif ( $wgUser->isBlockedFromCreateAccount() ) {
 298                         $this->userBlockedMessage();
 299                         return false;
 300                 }
 301
 302                 $ip = wfGetIP();
 303                 if ( $wgUser->isDnsBlacklisted( $ip, true /* check $wgProxyWhitelist */ ) ) {
 304                         $this->mainLoginForm( wfMsg( 'sorbs_create_account_reason' ) . ' (' . htmlspecialchars( $ip ) . ')' );
 305                         return false;
 306                 }
 307
 308                 # Now create a dummy user ($u) and check if it is valid
 309                 $name = trim( $this->mUsername );
 310                 $u = User::newFromName( $name, 'creatable' );
 311                 if ( !is_object( $u ) ) {
 312                         $this->mainLoginForm( wfMsg( 'noname' ) );
 313                         return false;
 314                 }
 315
 316                 if ( 0 != $u->idForName() ) {
 317                         $this->mainLoginForm( wfMsg( 'userexists' ) );
 318                         return false;
 319                 }
 320
 321                 if ( 0 != strcmp( $this->mPassword, $this->mRetype ) ) {
 322                         $this->mainLoginForm( wfMsg( 'badretype' ) );
 323                         return false;
 324                 }
 325
 326                 # check for minimal password length
 327                 $valid = $u->getPasswordValidity( $this->mPassword );
 328                 if ( $valid !== true ) {
 329                         if ( !$this->mCreateaccountMail ) {
 330                                 $this->mainLoginForm( wfMsgExt( $valid, array( 'parsemag' ), $wgMinimalPasswordLength ) );
 331                                 return false;
 332                         } else {
 333                                 # do not force a password for account creation by email
 334                                 # set invalid password, it will be replaced later by a random generated password
 335                                 $this->mPassword = null;
 336                         }
 337                 }
 338
 339                 # if you need a confirmed email address to edit, then obviously you
 340                 # need an email address.
 341                 if ( $wgEmailConfirmToEdit && empty( $this->mEmail ) ) {
 342                         $this->mainLoginForm( wfMsg( 'noemailtitle' ) );
 343                         return false;
 344                 }
 345
 346                 if( !empty( $this->mEmail ) && !User::isValidEmailAddr( $this->mEmail ) ) {
 347                         $this->mainLoginForm( wfMsg( 'invalidemailaddress' ) );
 348                         return false;
 349                 }
 350
 351                 # Set some additional data so the AbortNewAccount hook can be used for
 352                 # more than just username validation
 353                 $u->setEmail( $this->mEmail );
 354                 $u->setRealName( $this->mRealName );
 355
 356                 $abortError = '';
 357                 if( !wfRunHooks( 'AbortNewAccount', array( $u, &$abortError ) ) ) {
 358                         // Hook point to add extra creation throttles and blocks
 359                         wfDebug( "LoginForm::addNewAccountInternal: a hook blocked creation\n" );
 360                         $this->mainLoginForm( $abortError );
 361                         return false;
 362                 }
 363
 364                 if ( $wgAccountCreationThrottle && $wgUser->isPingLimitable() ) {
 365                         $key = wfMemcKey( 'acctcreate', 'ip', $ip );
 366                         $value = $wgMemc->get( $key );
 367                         if ( !$value ) {
 368                                 $wgMemc->set( $key, 0, 86400 );
 369                         }
 370                         if ( $value >= $wgAccountCreationThrottle ) {
 371                                 $this->throttleHit( $wgAccountCreationThrottle );
 372                                 return false;
 373                         }
 374                         $wgMemc->incr( $key );
 375                 }
 376
 377                 if( !$wgAuth->addUser( $u, $this->mPassword, $this->mEmail, $this->mRealName ) ) {
 378                         $this->mainLoginForm( wfMsg( 'externaldberror' ) );
 379                         return false;
 380                 }
 381
 382                 self::clearCreateaccountToken();
 383                 return $this->initUser( $u, false );
 384         }
 385
 386         /**
 387          * Actually add a user to the database.
 388          * Give it a User object that has been initialised with a name.
 389          *
 390          * @param $u User object.
 391          * @param $autocreate boolean -- true if this is an autocreation via auth plugin
 392          * @return User object.
 393          * @private
 394          */
 395         function initUser( $u, $autocreate ) {
 396                 global $wgAuth;
 397
 398                 $u->addToDatabase();
 399
 400                 if ( $wgAuth->allowPasswordChange() ) {
 401                         $u->setPassword( $this->mPassword );
 402                 }
 403
 404                 $u->setEmail( $this->mEmail );
 405                 $u->setRealName( $this->mRealName );
 406                 $u->setToken();
 407
 408                 $wgAuth->initUser( $u, $autocreate );
 409
 410                 if ( $this->mExtUser ) {
 411                         $this->mExtUser->linkToLocal( $u->getId() );
 412                         $email = $this->mExtUser->getPref( 'emailaddress' );
 413                         if ( $email && !$this->mEmail ) {
 414                                 $u->setEmail( $email );
 415                         }
 416                 }
 417
 418                 $u->setOption( 'rememberpassword', $this->mRemember ? 1 : 0 );
 419                 $u->saveSettings();
 420
 421                 # Update user count
 422                 $ssUpdate = new SiteStatsUpdate( 0, 0, 0, 0, 1 );
 423                 $ssUpdate->doUpdate();
 424
 425                 return $u;
 426         }
 427
 428         /**
 429          * Internally authenticate the login request.
 430          *
 431          * This may create a local account as a side effect if the
 432          * authentication plugin allows transparent local account
 433          * creation.
 434          */
 435         public function authenticateUserData() {
 436                 global $wgUser, $wgAuth, $wgMemc;
 437
 438                 if ( $this->mUsername == '' ) {
 439                         return self::NO_NAME;
 440                 }
 441
 442                 // We require a login token to prevent login CSRF
 443                 // Handle part of this before incrementing the throttle so
 444                 // token-less login attempts don't count towards the throttle
 445                 // but wrong-token attempts do.
 446
 447                 // If the user doesn't have a login token yet, set one.
 448                 if ( !self::getLoginToken() ) {
 449                         self::setLoginToken();
 450                         return self::NEED_TOKEN;
 451                 }
 452                 // If the user didn't pass a login token, tell them we need one
 453                 if ( !$this->mToken ) {
 454                         return self::NEED_TOKEN;
 455                 }
 456
 457                 global $wgPasswordAttemptThrottle;
 458
 459                 $throttleCount = 0;
 460                 if ( is_array( $wgPasswordAttemptThrottle ) ) {
 461                         $throttleKey = wfMemcKey( 'password-throttle', wfGetIP(), md5( $this->mUsername ) );
 462                         $count = $wgPasswordAttemptThrottle['count'];
 463                         $period = $wgPasswordAttemptThrottle['seconds'];
 464
 465                         $throttleCount = $wgMemc->get( $throttleKey );
 466                         if ( !$throttleCount ) {
 467                                 $wgMemc->add( $throttleKey, 1, $period ); // start counter
 468                         } elseif ( $throttleCount < $count ) {
 469                                 $wgMemc->incr( $throttleKey );
 470                         } elseif ( $throttleCount >= $count ) {
 471                                 return self::THROTTLED;
 472                         }
 473                 }
 474
 475                 // Validate the login token
 476                 if ( $this->mToken !== self::getLoginToken() ) {
 477                         return self::WRONG_TOKEN;
 478                 }
 479
 480                 // Load $wgUser now, and check to see if we're logging in as the same
 481                 // name. This is necessary because loading $wgUser (say by calling
 482                 // getName()) calls the UserLoadFromSession hook, which potentially
 483                 // creates the user in the database. Until we load $wgUser, checking
 484                 // for user existence using User::newFromName($name)->getId() below
 485                 // will effectively be using stale data.
 486                 if ( $wgUser->getName() === $this->mUsername ) {
 487                         wfDebug( __METHOD__ . ": already logged in as {$this->mUsername}\n" );
 488                         return self::SUCCESS;
 489                 }
 490
 491                 $this->mExtUser = ExternalUser::newFromName( $this->mUsername );
 492
 493                 # TODO: Allow some magic here for invalid external names, e.g., let the
 494                 # user choose a different wiki name.
 495                 $u = User::newFromName( $this->mUsername );
 496                 if( !( $u instanceof User ) || !User::isUsableName( $u->getName() ) ) {
 497                         return self::ILLEGAL;
 498                 }
 499
 500                 $isAutoCreated = false;
 501                 if ( 0 == $u->getID() ) {
 502                         $status = $this->attemptAutoCreate( $u );
 503                         if ( $status !== self::SUCCESS ) {
 504                                 return $status;
 505                         } else {
 506                                 $isAutoCreated = true;
 507                         }
 508                 } else {
 509                         global $wgExternalAuthType, $wgAutocreatePolicy;
 510                         if ( $wgExternalAuthType && $wgAutocreatePolicy != 'never'
 511                         && is_object( $this->mExtUser )
 512                         && $this->mExtUser->authenticate( $this->mPassword ) ) {
 513                                 # The external user and local user have the same name and
 514                                 # password, so we assume they're the same.
 515                                 $this->mExtUser->linkToLocal( $u->getID() );
 516                         }
 517
 518                         $u->load();
 519                 }
 520
 521                 // Give general extensions, such as a captcha, a chance to abort logins
 522                 $abort = self::ABORTED;
 523                 if( !wfRunHooks( 'AbortLogin', array( $u, $this->mPassword, &$abort ) ) ) {
 524                         return $abort;
 525                 }
 526
 527                 global $wgBlockDisablesLogin;
 528                 if ( !$u->checkPassword( $this->mPassword ) ) {
 529                         if( $u->checkTemporaryPassword( $this->mPassword ) ) {
 530                                 // The e-mailed temporary password should not be used for actu-
 531                                 // al logins; that's a very sloppy habit, and insecure if an
 532                                 // attacker has a few seconds to click "search" on someone's o-
 533                                 // pen mail reader.
 534                                 //
 535                                 // Allow it to be used only to reset the password a single time
 536                                 // to a new value, which won't be in the user's e-mail ar-
 537                                 // chives.
 538                                 //
 539                                 // For backwards compatibility, we'll still recognize it at the
 540                                 // login form to minimize surprises for people who have been
 541                                 // logging in with a temporary password for some time.
 542                                 //
 543                                 // As a side-effect, we can authenticate the user's e-mail ad-
 544                                 // dress if it's not already done, since the temporary password
 545                                 // was sent via e-mail.
 546                                 if( !$u->isEmailConfirmed() ) {
 547                                         $u->confirmEmail();
 548                                         $u->saveSettings();
 549                                 }
 550
 551                                 // At this point we just return an appropriate code/ indicating
 552                                 // that the UI should show a password reset form; bot inter-
 553                                 // faces etc will probably just fail cleanly here.
 554                                 $retval = self::RESET_PASS;
 555                         } else {
 556                                 $retval = ( $this->mPassword  == '' ) ? self::EMPTY_PASS : self::WRONG_PASS;
 557                         }
 558                 } elseif ( $wgBlockDisablesLogin && $u->isBlocked() ) {
 559                         // If we've enabled it, make it so that a blocked user cannot login
 560                         $retval = self::USER_BLOCKED;
 561                 } else {
 562                         $wgAuth->updateUser( $u );
 563                         $wgUser = $u;
 564
 565                         // Please reset throttle for successful logins, thanks!
 566                         if( $throttleCount ) {
 567                                 $wgMemc->delete( $throttleKey );
 568                         }
 569
 570                         if ( $isAutoCreated ) {
 571                                 // Must be run after $wgUser is set, for correct new user log
 572                                 wfRunHooks( 'AuthPluginAutoCreate', array( $wgUser ) );
 573                         }
 574
 575                         $retval = self::SUCCESS;
 576                 }
 577                 wfRunHooks( 'LoginAuthenticateAudit', array( $u, $this->mPassword, $retval ) );
 578                 return $retval;
 579         }
 580
 581         /**
 582          * Attempt to automatically create a user on login. Only succeeds if there
 583          * is an external authentication method which allows it.
 584          * @return integer Status code
 585          */
 586         function attemptAutoCreate( $user ) {
 587                 global $wgAuth, $wgUser, $wgAutocreatePolicy;
 588
 589                 if ( $wgUser->isBlockedFromCreateAccount() ) {
 590                         wfDebug( __METHOD__ . ": user is blocked from account creation\n" );
 591                         return self::CREATE_BLOCKED;
 592                 }
 593
 594                 /**
 595                  * If the external authentication plugin allows it, automatically cre-
 596                  * ate a new account for users that are externally defined but have not
 597                  * yet logged in.
 598                  */
 599                 if ( $this->mExtUser ) {
 600                         # mExtUser is neither null nor false, so use the new ExternalAuth
 601                         # system.
 602                         if ( $wgAutocreatePolicy == 'never' ) {
 603                                 return self::NOT_EXISTS;
 604                         }
 605                         if ( !$this->mExtUser->authenticate( $this->mPassword ) ) {
 606                                 return self::WRONG_PLUGIN_PASS;
 607                         }
 608                 } else {
 609                         # Old AuthPlugin.
 610                         if ( !$wgAuth->autoCreate() ) {
 611                                 return self::NOT_EXISTS;
 612                         }
 613                         if ( !$wgAuth->userExists( $user->getName() ) ) {
 614                                 wfDebug( __METHOD__ . ": user does not exist\n" );
 615                                 return self::NOT_EXISTS;
 616                         }
 617                         if ( !$wgAuth->authenticate( $user->getName(), $this->mPassword ) ) {
 618                                 wfDebug( __METHOD__ . ": \$wgAuth->authenticate() returned false, aborting\n" );
 619                                 return self::WRONG_PLUGIN_PASS;
 620                         }
 621                 }
 622
 623                 wfDebug( __METHOD__ . ": creating account\n" );
 624                 $this->initUser( $user, true );
 625                 return self::SUCCESS;
 626         }
 627
 628         function processLogin() {
 629                 global $wgUser;
 630
 631                 switch ( $this->authenticateUserData() ) {
 632                         case self::SUCCESS:
 633                                 # We've verified now, update the real record
 634                                 if( (bool)$this->mRemember != (bool)$wgUser->getOption( 'rememberpassword' ) ) {
 635                                         $wgUser->setOption( 'rememberpassword', $this->mRemember ? 1 : 0 );
 636                                         $wgUser->saveSettings();
 637                                 } else {
 638                                         $wgUser->invalidateCache();
 639                                 }
 640                                 $wgUser->setCookies();
 641                                 self::clearLoginToken();
 642
 643                                 // Reset the throttle
 644                                 $key = wfMemcKey( 'password-throttle', wfGetIP(), md5( $this->mUsername ) );
 645                                 global $wgMemc;
 646                                 $wgMemc->delete( $key );
 647
 648                                 if( $this->hasSessionCookie() || $this->mSkipCookieCheck ) {
 649                                         /* Replace the language object to provide user interface in
 650                                          * correct language immediately on this first page load.
 651                                          */
 652                                         global $wgLang, $wgRequest;
 653                                         $code = $wgRequest->getVal( 'uselang', $wgUser->getOption( 'language' ) );
 654                                         $wgLang = Language::factory( $code );
 655                                         return $this->successfulLogin();
 656                                 } else {
 657                                         return $this->cookieRedirectCheck( 'login' );
 658                                 }
 659                                 break;
 660
 661                         case self::NEED_TOKEN:
 662                                 $this->mainLoginForm( wfMsgExt( 'nocookiesforlogin', array( 'parseinline' ) ) );
 663                                 break;
 664                         case self::WRONG_TOKEN:
 665                                 $this->mainLoginForm( wfMsg( 'sessionfailure' ) );
 666                                 break;
 667                         case self::NO_NAME:
 668                         case self::ILLEGAL:
 669                                 $this->mainLoginForm( wfMsg( 'noname' ) );
 670                                 break;
 671                         case self::WRONG_PLUGIN_PASS:
 672                                 $this->mainLoginForm( wfMsg( 'wrongpassword' ) );
 673                                 break;
 674                         case self::NOT_EXISTS:
 675                                 if( $wgUser->isAllowed( 'createaccount' ) ) {
 676                                         $this->mainLoginForm( wfMsgWikiHtml( 'nosuchuser', htmlspecialchars( $this->mUsername ) ) );
 677                                 } else {
 678                                         $this->mainLoginForm( wfMsg( 'nosuchusershort', htmlspecialchars( $this->mUsername ) ) );
 679                                 }
 680                                 break;
 681                         case self::WRONG_PASS:
 682                                 $this->mainLoginForm( wfMsg( 'wrongpassword' ) );
 683                                 break;
 684                         case self::EMPTY_PASS:
 685                                 $this->mainLoginForm( wfMsg( 'wrongpasswordempty' ) );
 686                                 break;
 687                         case self::RESET_PASS:
 688                                 $this->resetLoginForm( wfMsg( 'resetpass_announce' ) );
 689                                 break;
 690                         case self::CREATE_BLOCKED:
 691                                 $this->userBlockedMessage();
 692                                 break;
 693                         case self::THROTTLED:
 694                                 $this->mainLoginForm( wfMsg( 'login-throttled' ) );
 695                                 break;
 696                         case self::USER_BLOCKED:
 697                                 $this->mainLoginForm( wfMsgExt( 'login-userblocked',
 698                                         array( 'parsemag', 'escape' ), $this->mUsername ) );
 699                                 break;
 700                         default:
 701                                 throw new MWException( 'Unhandled case value' );
 702                 }
 703         }
 704
 705         function resetLoginForm( $error ) {
 706                 global $wgOut;
 707                 $wgOut->addHTML( Xml::element('p', array( 'class' => 'error' ), $error ) );
 708                 $reset = new SpecialResetpass();
 709                 $reset->execute( null );
 710         }
 711
 712         /**
 713          * @private
 714          */
 715         function mailPassword() {
 716                 global $wgUser, $wgOut, $wgAuth;
 717
 718                 if ( wfReadOnly() ) {
 719                         $wgOut->readOnlyPage();
 720                         return false;
 721                 }
 722
 723                 if( !$wgAuth->allowPasswordChange() ) {
 724                         $this->mainLoginForm( wfMsg( 'resetpass_forbidden' ) );
 725                         return;
 726                 }
 727
 728                 # Check against blocked IPs so blocked users can't flood admins
 729                 # with password resets
 730                 if( $wgUser->isBlocked() ) {
 731                         $this->mainLoginForm( wfMsg( 'blocked-mailpassword' ) );
 732                         return;
 733                 }
 734
 735                 # Check for hooks
 736                 $error = null;
 737                 if ( !wfRunHooks( 'UserLoginMailPassword', array( $this->mUsername, &$error ) ) ) {
 738                         $this->mainLoginForm( $error );
 739                         return;
 740                 }
 741
 742                 # If the user doesn't have a login token yet, set one.
 743                 if ( !self::getLoginToken() ) {
 744                         self::setLoginToken();
 745                         $this->mainLoginForm( wfMsg( 'sessionfailure' ) );
 746                         return;
 747                 }
 748
 749                 # If the user didn't pass a login token, tell them we need one
 750                 if ( !$this->mToken ) {
 751                         $this->mainLoginForm( wfMsg( 'sessionfailure' ) );
 752                         return;
 753                 }
 754
 755                 # Check against the rate limiter
 756                 if( $wgUser->pingLimiter( 'mailpassword' ) ) {
 757                         $wgOut->rateLimited();
 758                         return;
 759                 }
 760
 761                 if ( $this->mUsername == '' ) {
 762                         $this->mainLoginForm( wfMsg( 'noname' ) );
 763                         return;
 764                 }
 765                 $u = User::newFromName( $this->mUsername );
 766                 if( !$u instanceof User ) {
 767                         $this->mainLoginForm( wfMsg( 'noname' ) );
 768                         return;
 769                 }
 770                 if ( 0 == $u->getID() ) {
 771                         $this->mainLoginForm( wfMsgWikiHtml( 'nosuchuser', htmlspecialchars( $u->getName() ) ) );
 772                         return;
 773                 }
 774
 775                 # Validate the login token
 776                 if ( $this->mToken !== self::getLoginToken() ) {
 777                         $this->mainLoginForm( wfMsg( 'sessionfailure' ) );
 778                         return;
 779                 }
 780
 781                 # Check against password throttle
 782                 if ( $u->isPasswordReminderThrottled() ) {
 783                         global $wgPasswordReminderResendTime;
 784                         # Round the time in hours to 3 d.p., in case someone is specifying
 785                         # minutes or seconds.
 786                         $this->mainLoginForm( wfMsgExt( 'throttled-mailpassword', array( 'parsemag' ),
 787                                 round( $wgPasswordReminderResendTime, 3 ) ) );
 788                         return;
 789                 }
 790
 791                 $result = $this->mailPasswordInternal( $u, true, 'passwordremindertitle', 'passwordremindertext' );
 792                 if( $result->isGood() ) {
 793                         $this->mainLoginForm( wfMsg( 'passwordsent', $u->getName() ), 'success' );
 794                         self::clearLoginToken();
 795                 } else {
 796                         $this->mainLoginForm( $result->getWikiText( 'mailerror' ) );
 797                 }
 798         }
 799
 800
 801         /**
 802          * @param $u User object
 803          * @param $throttle Boolean
 804          * @param $emailTitle String: message name of email title
 805          * @param $emailText String: message name of email text
 806          * @return Status object
 807          * @private
 808          */
 809         function mailPasswordInternal( $u, $throttle = true, $emailTitle = 'passwordremindertitle', $emailText = 'passwordremindertext' ) {
 810                 global $wgServer, $wgScript, $wgUser, $wgNewPasswordExpiry;
 811
 812                 if ( $u->getEmail() == '' ) {
 813                         return Status::newFatal( 'noemail', $u->getName() );
 814                 }
 815                 $ip = wfGetIP();
 816                 if( !$ip ) {
 817                         return Status::newFatal( 'badipaddress' );
 818                 }
 819
 820                 wfRunHooks( 'User::mailPasswordInternal', array( &$wgUser, &$ip, &$u ) );
 821
 822                 $np = $u->randomPassword();
 823                 $u->setNewpassword( $np, $throttle );
 824                 $u->saveSettings();
 825                 $userLanguage = $u->getOption( 'language' );
 826                 $m = wfMsgExt( $emailText, array( 'parsemag', 'language' => $userLanguage ), $ip, $u->getName(), $np,
 827                                 $wgServer . $wgScript, round( $wgNewPasswordExpiry / 86400 ) );
 828                 $result = $u->sendMail( wfMsgExt( $emailTitle, array( 'parsemag', 'language' => $userLanguage ) ), $m );
 829
 830                 return $result;
 831         }
 832
 833
 834         /**
 835          * Run any hooks registered for logins, then HTTP redirect to
 836          * $this->mReturnTo (or Main Page if that's undefined).  Formerly we had a
 837          * nice message here, but that's really not as useful as just being sent to
 838          * wherever you logged in from.  It should be clear that the action was
 839          * successful, given the lack of error messages plus the appearance of your
 840          * name in the upper right.
 841          *
 842          * @private
 843          */
 844         function successfulLogin() {
 845                 global $wgUser, $wgOut;
 846
 847                 # Run any hooks; display injected HTML if any, else redirect
 848                 $injected_html = '';
 849                 wfRunHooks( 'UserLoginComplete', array( &$wgUser, &$injected_html ) );
 850
 851                 if( $injected_html !== '' ) {
 852                         $this->displaySuccessfulLogin( 'loginsuccess', $injected_html );
 853                 } else {
 854                         $titleObj = Title::newFromText( $this->mReturnTo );
 855                         if ( !$titleObj instanceof Title ) {
 856                                 $titleObj = Title::newMainPage();
 857                         }
 858                         $redirectUrl = $titleObj->getFullURL( $this->mReturnToQuery );
 859                         global $wgSecureLogin;
 860                         if( $wgSecureLogin && !$this->mStickHTTPS ) {
 861                                 $redirectUrl = preg_replace( '/^https:/', 'http:', $redirectUrl );
 862                         }
 863                         $wgOut->redirect( $redirectUrl );
 864                 }
 865         }
 866
 867         /**
 868          * Run any hooks registered for logins, then display a message welcoming
 869          * the user.
 870          *
 871          * @private
 872          */
 873         function successfulCreation() {
 874                 global $wgUser;
 875                 # Run any hooks; display injected HTML
 876                 $injected_html = '';
 877                 wfRunHooks( 'UserLoginComplete', array( &$wgUser, &$injected_html ) );
 878
 879                 $this->displaySuccessfulLogin( 'welcomecreation', $injected_html );
 880         }
 881
 882         /**
 883          * Display a "login successful" page.
 884          */
 885         private function displaySuccessfulLogin( $msgname, $injected_html ) {
 886                 global $wgOut, $wgUser;
 887
 888                 $wgOut->setPageTitle( wfMsg( 'loginsuccesstitle' ) );
 889                 $wgOut->addWikiMsg( $msgname, $wgUser->getName() );
 890                 $wgOut->addHTML( $injected_html );
 891
 892                 if ( !empty( $this->mReturnTo ) ) {
 893                         $wgOut->returnToMain( null, $this->mReturnTo, $this->mReturnToQuery );
 894                 } else {
 895                         $wgOut->returnToMain( null );
 896                 }
 897         }
 898
 899         /** */
 900         function userBlockedMessage() {
 901                 global $wgOut, $wgUser;
 902
 903                 # Let's be nice about this, it's likely that this feature will be used
 904                 # for blocking large numbers of innocent people, e.g. range blocks on
 905                 # schools. Don't blame it on the user. There's a small chance that it
 906                 # really is the user's fault, i.e. the username is blocked and they
 907                 # haven't bothered to log out before trying to create an account to
 908                 # evade it, but we'll leave that to their guilty conscience to figure
 909                 # out.
 910
 911                 $wgOut->setPageTitle( wfMsg( 'cantcreateaccounttitle' ) );
 912
 913                 $ip = wfGetIP();
 914                 $blocker = User::whoIs( $wgUser->mBlock->mBy );
 915                 $block_reason = $wgUser->mBlock->mReason;
 916
 917                 if ( strval( $block_reason ) === '' ) {
 918                         $block_reason = wfMsg( 'blockednoreason' );
 919                 }
 920                 $wgOut->addWikiMsg( 'cantcreateaccount-text', $ip, $block_reason, $blocker );
 921                 $wgOut->returnToMain( false );
 922         }
 923
 924         /**
 925          * @private
 926          */
 927         function mainLoginForm( $msg, $msgtype = 'error' ) {
 928                 global $wgUser, $wgOut, $wgHiddenPrefs, $wgEnableEmail;
 929                 global $wgRequest, $wgLoginLanguageSelector;
 930                 global $wgAuth, $wgEmailConfirmToEdit, $wgCookieExpiration;
 931                 global $wgSecureLogin;
 932
 933                 $titleObj = SpecialPage::getTitleFor( 'Userlogin' );
 934
 935                 if ( $this->mType == 'signup' ) {
 936                         // Block signup here if in readonly. Keeps user from
 937                         // going through the process (filling out data, etc)
 938                         // and being informed later.
 939                         if ( wfReadOnly() ) {
 940                                 $wgOut->readOnlyPage();
 941                                 return;
 942                         } elseif ( $wgUser->isBlockedFromCreateAccount() ) {
 943                                 $this->userBlockedMessage();
 944                                 return;
 945                         } elseif ( count( $permErrors = $titleObj->getUserPermissionsErrors( 'createaccount', $wgUser, true ) )>0 ) {
 946                                 $wgOut->showPermissionsErrorPage( $permErrors, 'createaccount' );
 947                                 return;
 948                         }
 949                 }
 950
 951                 if ( $this->mUsername == '' ) {
 952                         if ( $wgUser->isLoggedIn() ) {
 953                                 $this->mUsername = $wgUser->getName();
 954                         } else {
 955                                 $this->mUsername = $wgRequest->getCookie( 'UserName' );
 956                         }
 957                 }
 958
 959                 if ( $this->mType == 'signup' ) {
 960                         global $wgLivePasswordStrengthChecks;
 961                         if ( $wgLivePasswordStrengthChecks ) {
 962                                 $wgOut->addPasswordSecurity( 'wpPassword2', 'wpRetype' );
 963                         }
 964                         $template = new UsercreateTemplate();
 965                         $q = 'action=submitlogin&type=signup';
 966                         $linkq = 'type=login';
 967                         $linkmsg = 'gotaccount';
 968                 } else {
 969                         $template = new UserloginTemplate();
 970                         $q = 'action=submitlogin&type=login';
 971                         $linkq = 'type=signup';
 972                         $linkmsg = 'nologin';
 973                 }
 974
 975                 if ( !empty( $this->mReturnTo ) ) {
 976                         $returnto = '&returnto=' . wfUrlencode( $this->mReturnTo );
 977                         if ( !empty( $this->mReturnToQuery ) ) {
 978                                 $returnto .= '&returntoquery=' .
 979                                         wfUrlencode( $this->mReturnToQuery );
 980                         }
 981                         $q .= $returnto;
 982                         $linkq .= $returnto;
 983                 }
 984
 985                 # Pass any language selection on to the mode switch link
 986                 if( $wgLoginLanguageSelector && $this->mLanguage ) {
 987                         $linkq .= '&uselang=' . $this->mLanguage;
 988                 }
 989
 990                 $link = '<a href="' . htmlspecialchars ( $titleObj->getLocalURL( $linkq ) ) . '">';
 991                 $link .= wfMsgHtml( $linkmsg . 'link' ); # Calling either 'gotaccountlink' or 'nologinlink'
 992                 $link .= '</a>';
 993
 994                 # Don't show a "create account" link if the user can't
 995                 if( $this->showCreateOrLoginLink( $wgUser ) ) {
 996                         $template->set( 'link', wfMsgExt( $linkmsg, array( 'parseinline', 'replaceafter' ), $link ) );
 997                 } else {
 998                         $template->set( 'link', '' );
 999                 }
1000
1001                 $template->set( 'header', '' );
1002                 $template->set( 'name', $this->mUsername );
1003                 $template->set( 'password', $this->mPassword );
1004                 $template->set( 'retype', $this->mRetype );
1005                 $template->set( 'email', $this->mEmail );
1006                 $template->set( 'realname', $this->mRealName );
1007                 $template->set( 'domain', $this->mDomain );
1008                 $template->set( 'reason', $this->mReason );
1009
1010                 $template->set( 'action', $titleObj->getLocalURL( $q ) );
1011                 $template->set( 'message', $msg );
1012                 $template->set( 'messagetype', $msgtype );
1013                 $template->set( 'createemail', $wgEnableEmail && $wgUser->isLoggedIn() );
1014                 $template->set( 'userealname', !in_array( 'realname', $wgHiddenPrefs ) );
1015                 $template->set( 'useemail', $wgEnableEmail );
1016                 $template->set( 'emailrequired', $wgEmailConfirmToEdit );
1017                 $template->set( 'canreset', $wgAuth->allowPasswordChange() );
1018                 $template->set( 'canremember', ( $wgCookieExpiration > 0 ) );
1019                 $template->set( 'usereason', $wgUser->isLoggedIn() );
1020                 $template->set( 'remember', $wgUser->getOption( 'rememberpassword' ) || $this->mRemember );
1021                 $template->set( 'cansecurelogin', ( $wgSecureLogin === true ) );
1022                 $template->set( 'stickHTTPS', $this->mStickHTTPS );
1023
1024                 if ( $this->mType == 'signup' ) {
1025                         if ( !self::getCreateaccountToken() ) {
1026                                 self::setCreateaccountToken();
1027                         }
1028                         $template->set( 'token', self::getCreateaccountToken() );
1029                 } else {
1030                         if ( !self::getLoginToken() ) {
1031                                 self::setLoginToken();
1032                         }
1033                         $template->set( 'token', self::getLoginToken() );
1034                 }
1035
1036                 # Prepare language selection links as needed
1037                 if( $wgLoginLanguageSelector ) {
1038                         $template->set( 'languages', $this->makeLanguageSelector() );
1039                         if( $this->mLanguage )
1040                                 $template->set( 'uselang', $this->mLanguage );
1041                 }
1042
1043                 // Give authentication and captcha plugins a chance to modify the form
1044                 $wgAuth->modifyUITemplate( $template, $this->mType );
1045                 if ( $this->mType == 'signup' ) {
1046                         wfRunHooks( 'UserCreateForm', array( &$template ) );
1047                 } else {
1048                         wfRunHooks( 'UserLoginForm', array( &$template ) );
1049                 }
1050
1051                 // Changes the title depending on permissions for creating account
1052                 if ( $wgUser->isAllowed( 'createaccount' ) ) {
1053                         $wgOut->setPageTitle( wfMsg( 'userlogin' ) );
1054                 } else {
1055                         $wgOut->setPageTitle( wfMsg( 'userloginnocreate' ) );
1056                 }
1057
1058                 $wgOut->disallowUserJs(); // just in case...
1059                 $wgOut->addTemplate( $template );
1060         }
1061
1062         /**
1063          * @private
1064          */
1065         function showCreateOrLoginLink( &$user ) {
1066                 if( $this->mType == 'signup' ) {
1067                         return( true );
1068                 } elseif( $user->isAllowed( 'createaccount' ) ) {
1069                         return( true );
1070                 } else {
1071                         return( false );
1072                 }
1073         }
1074
1075         /**
1076          * Check if a session cookie is present.
1077          *
1078          * This will not pick up a cookie set during _this_ request, but is meant
1079          * to ensure that the client is returning the cookie which was set on a
1080          * previous pass through the system.
1081          *
1082          * @private
1083          */
1084         function hasSessionCookie() {
1085                 global $wgDisableCookieCheck, $wgRequest;
1086                 return $wgDisableCookieCheck ? true : $wgRequest->checkSessionCookie();
1087         }
1088
1089         /**
1090          * Get the login token from the current session
1091          */
1092         public static function getLoginToken() {
1093                 global $wgRequest;
1094                 return $wgRequest->getSessionData( 'wsLoginToken' );
1095         }
1096
1097         /**
1098          * Randomly generate a new login token and attach it to the current session
1099          */
1100         public static function setLoginToken() {
1101                 global $wgRequest;
1102                 // Use User::generateToken() instead of $user->editToken()
1103                 // because the latter reuses $_SESSION['wsEditToken']
1104                 $wgRequest->setSessionData( 'wsLoginToken', User::generateToken() );
1105         }
1106
1107         /**
1108          * Remove any login token attached to the current session
1109          */
1110         public static function clearLoginToken() {
1111                 global $wgRequest;
1112                 $wgRequest->setSessionData( 'wsLoginToken', null );
1113         }
1114
1115         /**
1116          * Get the createaccount token from the current session
1117          */
1118         public static function getCreateaccountToken() {
1119                 global $wgRequest;
1120                 return $wgRequest->getSessionData( 'wsCreateaccountToken' );
1121         }
1122
1123         /**
1124          * Randomly generate a new createaccount token and attach it to the current session
1125          */
1126         public static function setCreateaccountToken() {
1127                 global $wgRequest;
1128                 $wgRequest->setSessionData( 'wsCreateaccountToken', User::generateToken() );
1129         }
1130
1131         /**
1132          * Remove any createaccount token attached to the current session
1133          */
1134         public static function clearCreateaccountToken() {
1135                 global $wgRequest;
1136                 $wgRequest->setSessionData( 'wsCreateaccountToken', null );
1137         }
1138
1139         /**
1140          * @private
1141          */
1142         function cookieRedirectCheck( $type ) {
1143                 global $wgOut;
1144
1145                 $titleObj = SpecialPage::getTitleFor( 'Userlogin' );
1146                 $query = array( 'wpCookieCheck' => $type );
1147                 if ( $this->mReturnTo ) {
1148                         $query['returnto'] = $this->mReturnTo;
1149                 }
1150                 $check = $titleObj->getFullURL( $query );
1151
1152                 return $wgOut->redirect( $check );
1153         }
1154
1155         /**
1156          * @private
1157          */
1158         function onCookieRedirectCheck( $type ) {
1159                 if ( !$this->hasSessionCookie() ) {
1160                         if ( $type == 'new' ) {
1161                                 return $this->mainLoginForm( wfMsgExt( 'nocookiesnew', array( 'parseinline' ) ) );
1162                         } elseif ( $type == 'login' ) {
1163                                 return $this->mainLoginForm( wfMsgExt( 'nocookieslogin', array( 'parseinline' ) ) );
1164                         } else {
1165                                 # shouldn't happen
1166                                 return $this->mainLoginForm( wfMsg( 'error' ) );
1167                         }
1168                 } else {
1169                         return $this->successfulLogin();
1170                 }
1171         }
1172
1173         /**
1174          * @private
1175          */
1176         function throttleHit( $limit ) {
1177                 $this->mainLoginForm( wfMsgExt( 'acct_creation_throttle_hit', array( 'parseinline' ), $limit ) );
1178         }
1179
1180         /**
1181          * Produce a bar of links which allow the user to select another language
1182          * during login/registration but retain "returnto"
1183          *
1184          * @return string
1185          */
1186         function makeLanguageSelector() {
1187                 global $wgLang;
1188
1189                 $msg = wfMsgForContent( 'loginlanguagelinks' );
1190                 if( $msg != '' && !wfEmptyMsg( 'loginlanguagelinks', $msg ) ) {
1191                         $langs = explode( "\n", $msg );
1192                         $links = array();
1193                         foreach( $langs as $lang ) {
1194                                 $lang = trim( $lang, '* ' );
1195                                 $parts = explode( '|', $lang );
1196                                 if ( count( $parts ) >= 2 ) {
1197                                         $links[] = $this->makeLanguageSelectorLink( $parts[0], $parts[1] );
1198                                 }
1199                         }
1200                         return count( $links ) > 0 ? wfMsgHtml( 'loginlanguagelabel', $wgLang->pipeList( $links ) ) : '';
1201                 } else {
1202                         return '';
1203                 }
1204         }
1205
1206         /**
1207          * Create a language selector link for a particular language
1208          * Links back to this page preserving type and returnto
1209          *
1210          * @param $text Link text
1211          * @param $lang Language code
1212          */
1213         function makeLanguageSelectorLink( $text, $lang ) {
1214                 global $wgUser;
1215                 $self = SpecialPage::getTitleFor( 'Userlogin' );
1216                 $attr = array( 'uselang' => $lang );
1217                 if( $this->mType == 'signup' ) {
1218                         $attr['type'] = 'signup';
1219                 }
1220                 if( $this->mReturnTo ) {
1221                         $attr['returnto'] = $this->mReturnTo;
1222                 }
1223                 $skin = $wgUser->getSkin();
1224                 return $skin->linkKnown(
1225                         $self,
1226                         htmlspecialchars( $text ),
1227                         array(),
1228                         $attr
1229                 );
1230         }
1231 }