includes/specials/SpecialUserlogin.php

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