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