includes/specials/SpecialUserlogin.php

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