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                 global $wgSecureLogin;
 153                 if (
 154                         $this->mType !== 'signup' &&
 155                         $wgSecureLogin &&
 156                         WebRequest::detectProtocol() !== 'https'
 157                 ) {
 158                         $title = $this->getFullTitle();
 159                         $query = array(
 160                                 'returnto' => $this->mReturnTo,
 161                                 'returntoquery' => $this->mReturnToQuery,
 162                                 'wpStickHTTPS' => $this->mStickHTTPS
 163                         );
 164                         $url = $title->getFullURL( $query, false, PROTO_HTTPS );
 165                         $this->getOutput()->redirect( $url );
 166                         return;
 167                 }
 168
 169                 if ( $par == 'signup' ) { # Check for [[Special:Userlogin/signup]]
 170                         $this->mType = 'signup';
 171                 }
 172
 173                 if ( !is_null( $this->mCookieCheck ) ) {
 174                         $this->onCookieRedirectCheck( $this->mCookieCheck );
 175                         return;
 176                 } elseif( $this->mPosted ) {
 177                         if( $this->mCreateaccount ) {
 178                                 $this->addNewAccount();
 179                                 return;
 180                         } elseif ( $this->mCreateaccountMail ) {
 181                                 $this->addNewAccountMailPassword();
 182                                 return;
 183                         } elseif ( ( 'submitlogin' == $this->mAction ) || $this->mLoginattempt ) {
 184                                 $this->processLogin();
 185                                 return;
 186                         }
 187                 }
 188                 $this->mainLoginForm( '' );
 189         }
 190
 191         /**
 192          * @private
 193          */
 194         function addNewAccountMailPassword() {
 195                 if ( $this->mEmail == '' ) {
 196                         $this->mainLoginForm( $this->msg( 'noemailcreate' )->escaped() );
 197                         return;
 198                 }
 199
 200                 $u = $this->addNewaccountInternal();
 201
 202                 if ( $u == null ) {
 203                         return;
 204                 }
 205
 206                 // Wipe the initial password and mail a temporary one
 207                 $u->setPassword( null );
 208                 $u->saveSettings();
 209                 $result = $this->mailPasswordInternal( $u, false, 'createaccount-title', 'createaccount-text' );
 210
 211                 wfRunHooks( 'AddNewAccount', array( $u, true ) );
 212                 $u->addNewUserLogEntry( true, $this->mReason );
 213
 214                 $out = $this->getOutput();
 215                 $out->setPageTitle( $this->msg( 'accmailtitle' ) );
 216
 217                 if( !$result->isGood() ) {
 218                         $this->mainLoginForm( $this->msg( 'mailerror', $result->getWikiText() )->text() );
 219                 } else {
 220                         $out->addWikiMsg( 'accmailtext', $u->getName(), $u->getEmail() );
 221                         $this->executeReturnTo( 'success' );
 222                 }
 223         }
 224
 225         /**
 226          * @private
 227          * @return bool
 228          */
 229         function addNewAccount() {
 230                 global $wgUser, $wgEmailAuthentication, $wgLoginLanguageSelector;
 231
 232                 # Create the account and abort if there's a problem doing so
 233                 $u = $this->addNewAccountInternal();
 234                 if( $u == null ) {
 235                         return false;
 236                 }
 237
 238                 # If we showed up language selection links, and one was in use, be
 239                 # smart (and sensible) and save that language as the user's preference
 240                 if( $wgLoginLanguageSelector && $this->mLanguage ) {
 241                         $u->setOption( 'language', $this->mLanguage );
 242                 }
 243
 244                 $out = $this->getOutput();
 245
 246                 # Send out an email authentication message if needed
 247                 if( $wgEmailAuthentication && Sanitizer::validateEmail( $u->getEmail() ) ) {
 248                         $status = $u->sendConfirmationMail();
 249                         if( $status->isGood() ) {
 250                                 $out->addWikiMsg( 'confirmemail_oncreate' );
 251                         } else {
 252                                 $out->addWikiText( $status->getWikiText( 'confirmemail_sendfailed' ) );
 253                         }
 254                 }
 255
 256                 # Save settings (including confirmation token)
 257                 $u->saveSettings();
 258
 259                 # If not logged in, assume the new account as the current one and set
 260                 # session cookies then show a "welcome" message or a "need cookies"
 261                 # message as needed
 262                 if( $this->getUser()->isAnon() ) {
 263                         $u->setCookies();
 264                         $wgUser = $u;
 265                         // This should set it for OutputPage and the Skin
 266                         // which is needed or the personal links will be
 267                         // wrong.
 268                         $this->getContext()->setUser( $u );
 269                         wfRunHooks( 'AddNewAccount', array( $u, false ) );
 270                         $u->addNewUserLogEntry();
 271                         if( $this->hasSessionCookie() ) {
 272                                 $this->successfulCreation();
 273                         } else {
 274                                 $this->cookieRedirectCheck( 'new' );
 275                         }
 276                 } else {
 277                         # Confirm that the account was created
 278                         $out->setPageTitle( $this->msg( 'accountcreated' ) );
 279                         $out->addWikiMsg( 'accountcreatedtext', $u->getName() );
 280                         $out->addReturnTo( $this->getTitle() );
 281                         wfRunHooks( 'AddNewAccount', array( $u, false ) );
 282                         $u->addNewUserLogEntry( false, $this->mReason );
 283                 }
 284                 return true;
 285         }
 286
 287         /**
 288          * @private
 289          * @throws PermissionsError|ReadOnlyError
 290          * @return bool|User
 291          */
 292         function addNewAccountInternal() {
 293                 global $wgAuth, $wgMemc, $wgAccountCreationThrottle,
 294                         $wgMinimalPasswordLength, $wgEmailConfirmToEdit;
 295
 296                 // If the user passes an invalid domain, something is fishy
 297                 if( !$wgAuth->validDomain( $this->mDomain ) ) {
 298                         $this->mainLoginForm( $this->msg( 'wrongpassword' )->text() );
 299                         return false;
 300                 }
 301
 302                 // If we are not allowing users to login locally, we should be checking
 303                 // to see if the user is actually able to authenticate to the authenti-
 304                 // cation server before they create an account (otherwise, they can
 305                 // create a local account and login as any domain user). We only need
 306                 // to check this for domains that aren't local.
 307                 if( 'local' != $this->mDomain && $this->mDomain != '' ) {
 308                         if( !$wgAuth->canCreateAccounts() && ( !$wgAuth->userExists( $this->mUsername )
 309                                 || !$wgAuth->authenticate( $this->mUsername, $this->mPassword ) ) ) {
 310                                 $this->mainLoginForm( $this->msg( 'wrongpassword' )->text() );
 311                                 return false;
 312                         }
 313                 }
 314
 315                 if ( wfReadOnly() ) {
 316                         throw new ReadOnlyError;
 317                 }
 318
 319                 # Request forgery checks.
 320                 if ( !self::getCreateaccountToken() ) {
 321                         self::setCreateaccountToken();
 322                         $this->mainLoginForm( $this->msg( 'nocookiesfornew' )->parse() );
 323                         return false;
 324                 }
 325
 326                 # The user didn't pass a createaccount token
 327                 if ( !$this->mToken ) {
 328                         $this->mainLoginForm( $this->msg( 'sessionfailure' )->text() );
 329                         return false;
 330                 }
 331
 332                 # Validate the createaccount token
 333                 if ( $this->mToken !== self::getCreateaccountToken() ) {
 334                         $this->mainLoginForm( $this->msg( 'sessionfailure' )->text() );
 335                         return false;
 336                 }
 337
 338                 # Check permissions
 339                 $currentUser = $this->getUser();
 340                 if ( !$currentUser->isAllowed( 'createaccount' ) ) {
 341                         throw new PermissionsError( 'createaccount' );
 342                 } elseif ( $currentUser->isBlockedFromCreateAccount() ) {
 343                         $this->userBlockedMessage( $currentUser->isBlockedFromCreateAccount() );
 344                         return false;
 345                 }
 346
 347                 # Include checks that will include GlobalBlocking (Bug 38333)
 348                 $permErrors = $this->getTitle()->getUserPermissionsErrors( 'createaccount', $currentUser, true );
 349                 if ( count( $permErrors ) ) {
 350                                 throw new PermissionsError( 'createaccount', $permErrors );
 351                 }
 352
 353                 $ip = $this->getRequest()->getIP();
 354                 if ( $currentUser->isDnsBlacklisted( $ip, true /* check $wgProxyWhitelist */ ) ) {
 355                         $this->mainLoginForm( $this->msg( 'sorbs_create_account_reason' )->text() . ' ' . $this->msg( 'parentheses', $ip )->escaped() );
 356                         return false;
 357                 }
 358
 359                 # Now create a dummy user ($u) and check if it is valid
 360                 $name = trim( $this->mUsername );
 361                 $u = User::newFromName( $name, 'creatable' );
 362                 if ( !is_object( $u ) ) {
 363                         $this->mainLoginForm( $this->msg( 'noname' )->text() );
 364                         return false;
 365                 }
 366
 367                 if ( 0 != $u->idForName() ) {
 368                         $this->mainLoginForm( $this->msg( 'userexists' )->text() );
 369                         return false;
 370                 }
 371
 372                 if ( 0 != strcmp( $this->mPassword, $this->mRetype ) ) {
 373                         $this->mainLoginForm( $this->msg( 'badretype' )->text() );
 374                         return false;
 375                 }
 376
 377                 # check for minimal password length
 378                 $valid = $u->getPasswordValidity( $this->mPassword );
 379                 if ( $valid !== true ) {
 380                         if ( !$this->mCreateaccountMail ) {
 381                                 if ( is_array( $valid ) ) {
 382                                         $message = array_shift( $valid );
 383                                         $params = $valid;
 384                                 } else {
 385                                         $message = $valid;
 386                                         $params = array( $wgMinimalPasswordLength );
 387                                 }
 388                                 $this->mainLoginForm( $this->msg( $message, $params )->text() );
 389                                 return false;
 390                         } else {
 391                                 # do not force a password for account creation by email
 392                                 # set invalid password, it will be replaced later by a random generated password
 393                                 $this->mPassword = null;
 394                         }
 395                 }
 396
 397                 # if you need a confirmed email address to edit, then obviously you
 398                 # need an email address.
 399                 if ( $wgEmailConfirmToEdit && empty( $this->mEmail ) ) {
 400                         $this->mainLoginForm( $this->msg( 'noemailtitle' )->text() );
 401                         return false;
 402                 }
 403
 404                 if( !empty( $this->mEmail ) && !Sanitizer::validateEmail( $this->mEmail ) ) {
 405                         $this->mainLoginForm( $this->msg( 'invalidemailaddress' )->text() );
 406                         return false;
 407                 }
 408
 409                 # Set some additional data so the AbortNewAccount hook can be used for
 410                 # more than just username validation
 411                 $u->setEmail( $this->mEmail );
 412                 $u->setRealName( $this->mRealName );
 413
 414                 $abortError = '';
 415                 if( !wfRunHooks( 'AbortNewAccount', array( $u, &$abortError ) ) ) {
 416                         // Hook point to add extra creation throttles and blocks
 417                         wfDebug( "LoginForm::addNewAccountInternal: a hook blocked creation\n" );
 418                         $this->mainLoginForm( $abortError );
 419                         return false;
 420                 }
 421
 422                 // Hook point to check for exempt from account creation throttle
 423                 if ( !wfRunHooks( 'ExemptFromAccountCreationThrottle', array( $ip ) ) ) {
 424                         wfDebug( "LoginForm::exemptFromAccountCreationThrottle: a hook allowed account creation w/o throttle\n" );
 425                 } else {
 426                         if ( ( $wgAccountCreationThrottle && $currentUser->isPingLimitable() ) ) {
 427                                 $key = wfMemcKey( 'acctcreate', 'ip', $ip );
 428                                 $value = $wgMemc->get( $key );
 429                                 if ( !$value ) {
 430                                         $wgMemc->set( $key, 0, 86400 );
 431                                 }
 432                                 if ( $value >= $wgAccountCreationThrottle ) {
 433                                         $this->throttleHit( $wgAccountCreationThrottle );
 434                                         return false;
 435                                 }
 436                                 $wgMemc->incr( $key );
 437                         }
 438                 }
 439
 440                 if( !$wgAuth->addUser( $u, $this->mPassword, $this->mEmail, $this->mRealName ) ) {
 441                         $this->mainLoginForm( $this->msg( 'externaldberror' )->text() );
 442                         return false;
 443                 }
 444
 445                 self::clearCreateaccountToken();
 446                 return $this->initUser( $u, false );
 447         }
 448
 449         /**
 450          * Actually add a user to the database.
 451          * Give it a User object that has been initialised with a name.
 452          *
 453          * @param $u User object.
 454          * @param $autocreate boolean -- true if this is an autocreation via auth plugin
 455          * @return User object.
 456          * @private
 457          */
 458         function initUser( $u, $autocreate ) {
 459                 global $wgAuth;
 460
 461                 $u->addToDatabase();
 462
 463                 if ( $wgAuth->allowPasswordChange() ) {
 464                         $u->setPassword( $this->mPassword );
 465                 }
 466
 467                 $u->setEmail( $this->mEmail );
 468                 $u->setRealName( $this->mRealName );
 469                 $u->setToken();
 470
 471                 $wgAuth->initUser( $u, $autocreate );
 472
 473                 if ( $this->mExtUser ) {
 474                         $this->mExtUser->linkToLocal( $u->getId() );
 475                         $email = $this->mExtUser->getPref( 'emailaddress' );
 476                         if ( $email && !$this->mEmail ) {
 477                                 $u->setEmail( $email );
 478                         }
 479                 }
 480
 481                 $u->setOption( 'rememberpassword', $this->mRemember ? 1 : 0 );
 482                 $u->saveSettings();
 483
 484                 # Update user count
 485                 DeferredUpdates::addUpdate( new SiteStatsUpdate( 0, 0, 0, 0, 1 ) );
 486
 487                 return $u;
 488         }
 489
 490         /**
 491          * Internally authenticate the login request.
 492          *
 493          * This may create a local account as a side effect if the
 494          * authentication plugin allows transparent local account
 495          * creation.
 496          * @return int
 497          */
 498         public function authenticateUserData() {
 499                 global $wgUser, $wgAuth;
 500
 501                 $this->load();
 502
 503                 if ( $this->mUsername == '' ) {
 504                         return self::NO_NAME;
 505                 }
 506
 507                 // We require a login token to prevent login CSRF
 508                 // Handle part of this before incrementing the throttle so
 509                 // token-less login attempts don't count towards the throttle
 510                 // but wrong-token attempts do.
 511
 512                 // If the user doesn't have a login token yet, set one.
 513                 if ( !self::getLoginToken() ) {
 514                         self::setLoginToken();
 515                         return self::NEED_TOKEN;
 516                 }
 517                 // If the user didn't pass a login token, tell them we need one
 518                 if ( !$this->mToken ) {
 519                         return self::NEED_TOKEN;
 520                 }
 521
 522                 $throttleCount = self::incLoginThrottle( $this->mUsername );
 523                 if ( $throttleCount === true ) {
 524                         return self::THROTTLED;
 525                 }
 526
 527                 // Validate the login token
 528                 if ( $this->mToken !== self::getLoginToken() ) {
 529                         return self::WRONG_TOKEN;
 530                 }
 531
 532                 // Load the current user now, and check to see if we're logging in as
 533                 // the same name. This is necessary because loading the current user
 534                 // (say by calling getName()) calls the UserLoadFromSession hook, which
 535                 // potentially creates the user in the database. Until we load $wgUser,
 536                 // checking for user existence using User::newFromName($name)->getId() below
 537                 // will effectively be using stale data.
 538                 if ( $this->getUser()->getName() === $this->mUsername ) {
 539                         wfDebug( __METHOD__ . ": already logged in as {$this->mUsername}\n" );
 540                         return self::SUCCESS;
 541                 }
 542
 543                 $this->mExtUser = ExternalUser::newFromName( $this->mUsername );
 544
 545                 # TODO: Allow some magic here for invalid external names, e.g., let the
 546                 # user choose a different wiki name.
 547                 $u = User::newFromName( $this->mUsername );
 548                 if( !( $u instanceof User ) || !User::isUsableName( $u->getName() ) ) {
 549                         return self::ILLEGAL;
 550                 }
 551
 552                 $isAutoCreated = false;
 553                 if ( 0 == $u->getID() ) {
 554                         $status = $this->attemptAutoCreate( $u );
 555                         if ( $status !== self::SUCCESS ) {
 556                                 return $status;
 557                         } else {
 558                                 $isAutoCreated = true;
 559                         }
 560                 } else {
 561                         global $wgExternalAuthType, $wgAutocreatePolicy;
 562                         if ( $wgExternalAuthType && $wgAutocreatePolicy != 'never'
 563                         && is_object( $this->mExtUser )
 564                         && $this->mExtUser->authenticate( $this->mPassword ) ) {
 565                                 # The external user and local user have the same name and
 566                                 # password, so we assume they're the same.
 567                                 $this->mExtUser->linkToLocal( $u->getID() );
 568                         }
 569
 570                         $u->load();
 571                 }
 572
 573                 // Give general extensions, such as a captcha, a chance to abort logins
 574                 $abort = self::ABORTED;
 575                 if( !wfRunHooks( 'AbortLogin', array( $u, $this->mPassword, &$abort, &$this->mAbortLoginErrorMsg ) ) ) {
 576                         return $abort;
 577                 }
 578
 579                 global $wgBlockDisablesLogin;
 580                 if ( !$u->checkPassword( $this->mPassword ) ) {
 581                         if( $u->checkTemporaryPassword( $this->mPassword ) ) {
 582                                 // The e-mailed temporary password should not be used for actu-
 583                                 // al logins; that's a very sloppy habit, and insecure if an
 584                                 // attacker has a few seconds to click "search" on someone's o-
 585                                 // pen mail reader.
 586                                 //
 587                                 // Allow it to be used only to reset the password a single time
 588                                 // to a new value, which won't be in the user's e-mail ar-
 589                                 // chives.
 590                                 //
 591                                 // For backwards compatibility, we'll still recognize it at the
 592                                 // login form to minimize surprises for people who have been
 593                                 // logging in with a temporary password for some time.
 594                                 //
 595                                 // As a side-effect, we can authenticate the user's e-mail ad-
 596                                 // dress if it's not already done, since the temporary password
 597                                 // was sent via e-mail.
 598                                 if( !$u->isEmailConfirmed() ) {
 599                                         $u->confirmEmail();
 600                                         $u->saveSettings();
 601                                 }
 602
 603                                 // At this point we just return an appropriate code/ indicating
 604                                 // that the UI should show a password reset form; bot inter-
 605                                 // faces etc will probably just fail cleanly here.
 606                                 $retval = self::RESET_PASS;
 607                         } else {
 608                                 $retval = ( $this->mPassword  == '' ) ? self::EMPTY_PASS : self::WRONG_PASS;
 609                         }
 610                 } elseif ( $wgBlockDisablesLogin && $u->isBlocked() ) {
 611                         // If we've enabled it, make it so that a blocked user cannot login
 612                         $retval = self::USER_BLOCKED;
 613                 } else {
 614                         $wgAuth->updateUser( $u );
 615                         $wgUser = $u;
 616                         // This should set it for OutputPage and the Skin
 617                         // which is needed or the personal links will be
 618                         // wrong.
 619                         $this->getContext()->setUser( $u );
 620
 621                         // Please reset throttle for successful logins, thanks!
 622                         if ( $throttleCount ) {
 623                                 self::clearLoginThrottle( $this->mUsername );
 624                         }
 625
 626                         if ( $isAutoCreated ) {
 627                                 // Must be run after $wgUser is set, for correct new user log
 628                                 wfRunHooks( 'AuthPluginAutoCreate', array( $u ) );
 629                         }
 630
 631                         $retval = self::SUCCESS;
 632                 }
 633                 wfRunHooks( 'LoginAuthenticateAudit', array( $u, $this->mPassword, $retval ) );
 634                 return $retval;
 635         }
 636
 637         /**
 638          * Increment the login attempt throttle hit count for the (username,current IP)
 639          * tuple unless the throttle was already reached.
 640          * @param $username string The user name
 641          * @return Bool|Integer The integer hit count or True if it is already at the limit
 642          */
 643         public static function incLoginThrottle( $username ) {
 644                 global $wgPasswordAttemptThrottle, $wgMemc, $wgRequest;
 645                 $username = trim( $username ); // sanity
 646
 647                 $throttleCount = 0;
 648                 if ( is_array( $wgPasswordAttemptThrottle ) ) {
 649                         $throttleKey = wfMemcKey( 'password-throttle', $wgRequest->getIP(), md5( $username ) );
 650                         $count = $wgPasswordAttemptThrottle['count'];
 651                         $period = $wgPasswordAttemptThrottle['seconds'];
 652
 653                         $throttleCount = $wgMemc->get( $throttleKey );
 654                         if ( !$throttleCount ) {
 655                                 $wgMemc->add( $throttleKey, 1, $period ); // start counter
 656                         } elseif ( $throttleCount < $count ) {
 657                                 $wgMemc->incr( $throttleKey );
 658                         } elseif ( $throttleCount >= $count ) {
 659                                 return true;
 660                         }
 661                 }
 662
 663                 return $throttleCount;
 664         }
 665
 666         /**
 667          * Clear the login attempt throttle hit count for the (username,current IP) tuple.
 668          * @param $username string The user name
 669          * @return void
 670          */
 671         public static function clearLoginThrottle( $username ) {
 672                 global $wgMemc, $wgRequest;
 673                 $username = trim( $username ); // sanity
 674
 675                 $throttleKey = wfMemcKey( 'password-throttle', $wgRequest->getIP(), md5( $username ) );
 676                 $wgMemc->delete( $throttleKey );
 677         }
 678
 679         /**
 680          * Attempt to automatically create a user on login. Only succeeds if there
 681          * is an external authentication method which allows it.
 682          *
 683          * @param $user User
 684          *
 685          * @return integer Status code
 686          */
 687         function attemptAutoCreate( $user ) {
 688                 global $wgAuth, $wgAutocreatePolicy;
 689
 690                 if ( $this->getUser()->isBlockedFromCreateAccount() ) {
 691                         wfDebug( __METHOD__ . ": user is blocked from account creation\n" );
 692                         return self::CREATE_BLOCKED;
 693                 }
 694
 695                 /**
 696                  * If the external authentication plugin allows it, automatically cre-
 697                  * ate a new account for users that are externally defined but have not
 698                  * yet logged in.
 699                  */
 700                 if ( $this->mExtUser ) {
 701                         # mExtUser is neither null nor false, so use the new ExternalAuth
 702                         # system.
 703                         if ( $wgAutocreatePolicy == 'never' ) {
 704                                 return self::NOT_EXISTS;
 705                         }
 706                         if ( !$this->mExtUser->authenticate( $this->mPassword ) ) {
 707                                 return self::WRONG_PLUGIN_PASS;
 708                         }
 709                 } else {
 710                         # Old AuthPlugin.
 711                         if ( !$wgAuth->autoCreate() ) {
 712                                 return self::NOT_EXISTS;
 713                         }
 714                         if ( !$wgAuth->userExists( $user->getName() ) ) {
 715                                 wfDebug( __METHOD__ . ": user does not exist\n" );
 716                                 return self::NOT_EXISTS;
 717                         }
 718                         if ( !$wgAuth->authenticate( $user->getName(), $this->mPassword ) ) {
 719                                 wfDebug( __METHOD__ . ": \$wgAuth->authenticate() returned false, aborting\n" );
 720                                 return self::WRONG_PLUGIN_PASS;
 721                         }
 722                 }
 723
 724                 $abortError = '';
 725                 if( !wfRunHooks( 'AbortAutoAccount', array( $user, &$abortError ) ) ) {
 726                         // Hook point to add extra creation throttles and blocks
 727                         wfDebug( "LoginForm::attemptAutoCreate: a hook blocked creation: $abortError\n" );
 728                         $this->mAbortLoginErrorMsg = $abortError;
 729                         return self::ABORTED;
 730                 }
 731
 732                 wfDebug( __METHOD__ . ": creating account\n" );
 733                 $this->initUser( $user, true );
 734                 return self::SUCCESS;
 735         }
 736
 737         function processLogin() {
 738                 global $wgMemc, $wgLang;
 739
 740                 switch ( $this->authenticateUserData() ) {
 741                         case self::SUCCESS:
 742                                 global $wgSecureLogin;
 743                                 # We've verified now, update the real record
 744                                 $user = $this->getUser();
 745                                 if( (bool)$this->mRemember != (bool)$user->getOption( 'rememberpassword' ) ) {
 746                                         $user->setOption( 'rememberpassword', $this->mRemember ? 1 : 0 );
 747                                         $user->saveSettings();
 748                                 } else {
 749                                         $user->invalidateCache();
 750                                 }
 751
 752                                 if( $wgSecureLogin && !$this->mStickHTTPS ) {
 753                                         $user->setCookies( null, false );
 754                                 } else {
 755                                         $user->setCookies();
 756                                 }
 757                                 self::clearLoginToken();
 758
 759                                 // Reset the throttle
 760                                 $request = $this->getRequest();
 761                                 $key = wfMemcKey( 'password-throttle', $request->getIP(), md5( $this->mUsername ) );
 762                                 $wgMemc->delete( $key );
 763
 764                                 if( $this->hasSessionCookie() || $this->mSkipCookieCheck ) {
 765                                         /* Replace the language object to provide user interface in
 766                                          * correct language immediately on this first page load.
 767                                          */
 768                                         $code = $request->getVal( 'uselang', $user->getOption( 'language' ) );
 769                                         $userLang = Language::factory( $code );
 770                                         $wgLang = $userLang;
 771                                         $this->getContext()->setLanguage( $userLang );
 772                                         $this->successfulLogin();
 773                                 } else {
 774                                         $this->cookieRedirectCheck( 'login' );
 775                                 }
 776                                 break;
 777
 778                         case self::NEED_TOKEN:
 779                                 $this->mainLoginForm( $this->msg( 'nocookiesforlogin' )->parse() );
 780                                 break;
 781                         case self::WRONG_TOKEN:
 782                                 $this->mainLoginForm( $this->msg( 'sessionfailure' )->text() );
 783                                 break;
 784                         case self::NO_NAME:
 785                         case self::ILLEGAL:
 786                                 $this->mainLoginForm( $this->msg( 'noname' )->text() );
 787                                 break;
 788                         case self::WRONG_PLUGIN_PASS:
 789                                 $this->mainLoginForm( $this->msg( 'wrongpassword' )->text() );
 790                                 break;
 791                         case self::NOT_EXISTS:
 792                                 if( $this->getUser()->isAllowed( 'createaccount' ) ) {
 793                                         $this->mainLoginForm( $this->msg( 'nosuchuser',
 794                                                 wfEscapeWikiText( $this->mUsername ) )->parse() );
 795                                 } else {
 796                                         $this->mainLoginForm( $this->msg( 'nosuchusershort',
 797                                                 wfEscapeWikiText( $this->mUsername ) )->text() );
 798                                 }
 799                                 break;
 800                         case self::WRONG_PASS:
 801                                 $this->mainLoginForm( $this->msg( 'wrongpassword' )->text() );
 802                                 break;
 803                         case self::EMPTY_PASS:
 804                                 $this->mainLoginForm( $this->msg( 'wrongpasswordempty' )->text() );
 805                                 break;
 806                         case self::RESET_PASS:
 807                                 $this->resetLoginForm( $this->msg( 'resetpass_announce' )->text() );
 808                                 break;
 809                         case self::CREATE_BLOCKED:
 810                                 $this->userBlockedMessage( $this->getUser()->mBlock );
 811                                 break;
 812                         case self::THROTTLED:
 813                                 $this->mainLoginForm( $this->msg( 'login-throttled' )->text() );
 814                                 break;
 815                         case self::USER_BLOCKED:
 816                                 $this->mainLoginForm( $this->msg( 'login-userblocked',
 817                                         $this->mUsername )->escaped() );
 818                                 break;
 819                         case self::ABORTED:
 820                                 $this->mainLoginForm( $this->msg( $this->mAbortLoginErrorMsg )->text() );
 821                                 break;
 822                         default:
 823                                 throw new MWException( 'Unhandled case value' );
 824                 }
 825         }
 826
 827         function resetLoginForm( $error ) {
 828                 $this->getOutput()->addHTML( Xml::element('p', array( 'class' => 'error' ), $error ) );
 829                 $reset = new SpecialChangePassword();
 830                 $reset->setContext( $this->getContext() );
 831                 $reset->execute( null );
 832         }
 833
 834         /**
 835          * @param $u User object
 836          * @param $throttle Boolean
 837          * @param $emailTitle String: message name of email title
 838          * @param $emailText String: message name of email text
 839          * @return Status object
 840          */
 841         function mailPasswordInternal( $u, $throttle = true, $emailTitle = 'passwordremindertitle', $emailText = 'passwordremindertext' ) {
 842                 global $wgServer, $wgScript, $wgNewPasswordExpiry;
 843
 844                 if ( $u->getEmail() == '' ) {
 845                         return Status::newFatal( 'noemail', $u->getName() );
 846                 }
 847                 $ip = $this->getRequest()->getIP();
 848                 if( !$ip ) {
 849                         return Status::newFatal( 'badipaddress' );
 850                 }
 851
 852                 $currentUser = $this->getUser();
 853                 wfRunHooks( 'User::mailPasswordInternal', array( &$currentUser, &$ip, &$u ) );
 854
 855                 $np = $u->randomPassword();
 856                 $u->setNewpassword( $np, $throttle );
 857                 $u->saveSettings();
 858                 $userLanguage = $u->getOption( 'language' );
 859                 $m = $this->msg( $emailText, $ip, $u->getName(), $np, '<' . $wgServer . $wgScript . '>',
 860                         round( $wgNewPasswordExpiry / 86400 ) )->inLanguage( $userLanguage )->text();
 861                 $result = $u->sendMail( $this->msg( $emailTitle )->inLanguage( $userLanguage )->text(), $m );
 862
 863                 return $result;
 864         }
 865
 866
 867         /**
 868          * Run any hooks registered for logins, then HTTP redirect to
 869          * $this->mReturnTo (or Main Page if that's undefined).  Formerly we had a
 870          * nice message here, but that's really not as useful as just being sent to
 871          * wherever you logged in from.  It should be clear that the action was
 872          * successful, given the lack of error messages plus the appearance of your
 873          * name in the upper right.
 874          *
 875          * @private
 876          */
 877         function successfulLogin() {
 878                 # Run any hooks; display injected HTML if any, else redirect
 879                 $currentUser = $this->getUser();
 880                 $injected_html = '';
 881                 wfRunHooks( 'UserLoginComplete', array( &$currentUser, &$injected_html ) );
 882
 883                 if( $injected_html !== '' ) {
 884                         $this->displaySuccessfulLogin( 'loginsuccess', $injected_html );
 885                 } else {
 886                         $this->executeReturnTo( 'successredirect' );
 887                 }
 888         }
 889
 890         /**
 891          * Run any hooks registered for logins, then display a message welcoming
 892          * the user.
 893          *
 894          * @private
 895          */
 896         function successfulCreation() {
 897                 # Run any hooks; display injected HTML
 898                 $currentUser = $this->getUser();
 899                 $injected_html = '';
 900                 $welcome_creation_msg = 'welcomecreation';
 901
 902                 wfRunHooks( 'UserLoginComplete', array( &$currentUser, &$injected_html ) );
 903
 904                 /**
 905                  * Let any extensions change what message is shown.
 906                  * @see https://www.mediawiki.org/wiki/Manual:Hooks/BeforeWelcomeCreation
 907                  * @since 1.18
 908                  */
 909                 wfRunHooks( 'BeforeWelcomeCreation', array( &$welcome_creation_msg, &$injected_html ) );
 910
 911                 $this->displaySuccessfulLogin( $welcome_creation_msg, $injected_html );
 912         }
 913
 914         /**
 915          * Display a "login successful" page.
 916          * @param $msgname string
 917          * @param $injected_html string
 918          */
 919         private function displaySuccessfulLogin( $msgname, $injected_html ) {
 920                 $out = $this->getOutput();
 921                 $out->setPageTitle( $this->msg( 'loginsuccesstitle' ) );
 922                 if( $msgname ){
 923                         $out->addWikiMsg( $msgname, wfEscapeWikiText( $this->getUser()->getName() ) );
 924                 }
 925
 926                 $out->addHTML( $injected_html );
 927
 928                 $this->executeReturnTo( 'success' );
 929         }
 930
 931         /**
 932          * Output a message that informs the user that they cannot create an account because
 933          * there is a block on them or their IP which prevents account creation.  Note that
 934          * User::isBlockedFromCreateAccount(), which gets this block, ignores the 'hardblock'
 935          * setting on blocks (bug 13611).
 936          * @param $block Block the block causing this error
 937          */
 938         function userBlockedMessage( Block $block ) {
 939                 # Let's be nice about this, it's likely that this feature will be used
 940                 # for blocking large numbers of innocent people, e.g. range blocks on
 941                 # schools. Don't blame it on the user. There's a small chance that it
 942                 # really is the user's fault, i.e. the username is blocked and they
 943                 # haven't bothered to log out before trying to create an account to
 944                 # evade it, but we'll leave that to their guilty conscience to figure
 945                 # out.
 946
 947                 $out = $this->getOutput();
 948                 $out->setPageTitle( $this->msg( 'cantcreateaccounttitle' ) );
 949
 950                 $block_reason = $block->mReason;
 951                 if ( strval( $block_reason ) === '' ) {
 952                         $block_reason = $this->msg( 'blockednoreason' )->text();
 953                 }
 954
 955                 $out->addWikiMsg(
 956                         'cantcreateaccount-text',
 957                         $block->getTarget(),
 958                         $block_reason,
 959                         $block->getByName()
 960                 );
 961
 962                 $this->executeReturnTo( 'error' );
 963         }
 964
 965         /**
 966          * Add a "return to" link or redirect to it.
 967          *
 968          * @param $type string, one of the following:
 969          *    - error: display a return to link ignoring $wgRedirectOnLogin
 970          *    - success: display a return to link using $wgRedirectOnLogin if needed
 971          *    - successredirect: send an HTTP redirect using $wgRedirectOnLogin if needed
 972          */
 973         private function executeReturnTo( $type ) {
 974                 global $wgRedirectOnLogin, $wgSecureLogin;
 975
 976                 if ( $type != 'error' && $wgRedirectOnLogin !== null ) {
 977                         $returnTo = $wgRedirectOnLogin;
 978                         $returnToQuery = array();
 979                 } else {
 980                         $returnTo = $this->mReturnTo;
 981                         $returnToQuery = wfCgiToArray( $this->mReturnToQuery );
 982                 }
 983
 984                 $returnToTitle = Title::newFromText( $returnTo );
 985                 if ( !$returnToTitle ) {
 986                         $returnToTitle = Title::newMainPage();
 987                 }
 988
 989                 if ( $wgSecureLogin && !$this->mStickHTTPS ) {
 990                         $options = array( 'http' );
 991                         $proto = PROTO_HTTP;
 992                 } else {
 993                         $options = array( 'https' );
 994                         $proto = PROTO_HTTPS;
 995                 }
 996
 997                 if ( $type == 'successredirect' ) {
 998                         $redirectUrl = $returnToTitle->getFullURL( $returnToQuery, false, $proto );
 999                         $this->getOutput()->redirect( $redirectUrl );
1000                 } else {
1001                         $this->getOutput()->addReturnTo( $returnToTitle, $returnToQuery, null, $options );
1002                 }
1003         }
1004
1005         /**
1006          * @private
1007          */
1008         function mainLoginForm( $msg, $msgtype = 'error' ) {
1009                 global $wgEnableEmail, $wgEnableUserEmail;
1010                 global $wgHiddenPrefs, $wgLoginLanguageSelector;
1011                 global $wgAuth, $wgEmailConfirmToEdit, $wgCookieExpiration;
1012                 global $wgSecureLogin, $wgPasswordResetRoutes;
1013
1014                 $titleObj = $this->getTitle();
1015                 $user = $this->getUser();
1016
1017                 if ( $this->mType == 'signup' ) {
1018                         // Block signup here if in readonly. Keeps user from
1019                         // going through the process (filling out data, etc)
1020                         // and being informed later.
1021                         $permErrors = $titleObj->getUserPermissionsErrors( 'createaccount', $user, true );
1022                         if ( count( $permErrors ) ) {
1023                                 throw new PermissionsError( 'createaccount', $permErrors );
1024                         } elseif ( $user->isBlockedFromCreateAccount() ) {
1025                                 $this->userBlockedMessage( $user->isBlockedFromCreateAccount() );
1026                                 return;
1027                         } elseif ( wfReadOnly() ) {
1028                                 throw new ReadOnlyError;
1029                         }
1030                 }
1031
1032                 if ( $this->mUsername == '' ) {
1033                         if ( $user->isLoggedIn() ) {
1034                                 $this->mUsername = $user->getName();
1035                         } else {
1036                                 $this->mUsername = $this->getRequest()->getCookie( 'UserName' );
1037                         }
1038                 }
1039
1040                 if ( $this->mType == 'signup' ) {
1041                         $template = new UsercreateTemplate();
1042                         $q = 'action=submitlogin&type=signup';
1043                         $linkq = 'type=login';
1044                         $linkmsg = 'gotaccount';
1045                 } else {
1046                         $template = new UserloginTemplate();
1047                         $q = 'action=submitlogin&type=login';
1048                         $linkq = 'type=signup';
1049                         $linkmsg = 'nologin';
1050                 }
1051
1052                 if ( $this->mReturnTo !== '' ) {
1053                         $returnto = '&returnto=' . wfUrlencode( $this->mReturnTo );
1054                         if ( $this->mReturnToQuery !== '' ) {
1055                                 $returnto .= '&returntoquery=' .
1056                                         wfUrlencode( $this->mReturnToQuery );
1057                         }
1058                         $q .= $returnto;
1059                         $linkq .= $returnto;
1060                 }
1061
1062                 # Don't show a "create account" link if the user can't
1063                 if( $this->showCreateOrLoginLink( $user ) ) {
1064                         # Pass any language selection on to the mode switch link
1065                         if( $wgLoginLanguageSelector && $this->mLanguage ) {
1066                                 $linkq .= '&uselang=' . $this->mLanguage;
1067                         }
1068                         $link = Html::element( 'a', array( 'href' => $titleObj->getLocalURL( $linkq ) ),
1069                                 $this->msg( $linkmsg . 'link' )->text() ); # Calling either 'gotaccountlink' or 'nologinlink'
1070
1071                         $template->set( 'link', $this->msg( $linkmsg )->rawParams( $link )->parse() );
1072                 } else {
1073                         $template->set( 'link', '' );
1074                 }
1075
1076                 $resetLink = $this->mType == 'signup'
1077                         ? null
1078                         : is_array( $wgPasswordResetRoutes ) && in_array( true, array_values( $wgPasswordResetRoutes ) );
1079
1080                 $template->set( 'header', '' );
1081                 $template->set( 'name', $this->mUsername );
1082                 $template->set( 'password', $this->mPassword );
1083                 $template->set( 'retype', $this->mRetype );
1084                 $template->set( 'email', $this->mEmail );
1085                 $template->set( 'realname', $this->mRealName );
1086                 $template->set( 'domain', $this->mDomain );
1087                 $template->set( 'reason', $this->mReason );
1088
1089                 $template->set( 'action', $titleObj->getLocalURL( $q ) );
1090                 $template->set( 'message', $msg );
1091                 $template->set( 'messagetype', $msgtype );
1092                 $template->set( 'createemail', $wgEnableEmail && $user->isLoggedIn() );
1093                 $template->set( 'userealname', !in_array( 'realname', $wgHiddenPrefs ) );
1094                 $template->set( 'useemail', $wgEnableEmail );
1095                 $template->set( 'emailrequired', $wgEmailConfirmToEdit );
1096                 $template->set( 'emailothers', $wgEnableUserEmail );
1097                 $template->set( 'canreset', $wgAuth->allowPasswordChange() );
1098                 $template->set( 'resetlink', $resetLink );
1099                 $template->set( 'canremember', ( $wgCookieExpiration > 0 ) );
1100                 $template->set( 'usereason', $user->isLoggedIn() );
1101                 $template->set( 'remember', $user->getOption( 'rememberpassword' ) || $this->mRemember );
1102                 $template->set( 'cansecurelogin', ( $wgSecureLogin === true ) );
1103                 $template->set( 'stickHTTPS', $this->mStickHTTPS );
1104
1105                 if ( $this->mType == 'signup' ) {
1106                         if ( !self::getCreateaccountToken() ) {
1107                                 self::setCreateaccountToken();
1108                         }
1109                         $template->set( 'token', self::getCreateaccountToken() );
1110                 } else {
1111                         if ( !self::getLoginToken() ) {
1112                                 self::setLoginToken();
1113                         }
1114                         $template->set( 'token', self::getLoginToken() );
1115                 }
1116
1117                 # Prepare language selection links as needed
1118                 if( $wgLoginLanguageSelector ) {
1119                         $template->set( 'languages', $this->makeLanguageSelector() );
1120                         if( $this->mLanguage ) {
1121                                 $template->set( 'uselang', $this->mLanguage );
1122                         }
1123                 }
1124
1125                 // Use loginend-https for HTTPS requests if it's not blank, loginend otherwise
1126                 // Ditto for signupend
1127                 $usingHTTPS = WebRequest::detectProtocol() == 'https';
1128                 $loginendHTTPS = $this->msg( 'loginend-https' );
1129                 $signupendHTTPS = $this->msg( 'signupend-https' );
1130                 if ( $usingHTTPS && !$loginendHTTPS->isBlank() ) {
1131                         $template->set( 'loginend', $loginendHTTPS->parse() );
1132                 } else {
1133                         $template->set( 'loginend', $this->msg( 'loginend' )->parse() );
1134                 }
1135                 if ( $usingHTTPS && !$signupendHTTPS->isBlank() ) {
1136                         $template->set( 'signupend', $signupendHTTPS->parse() );
1137                 } else {
1138                         $template->set( 'signupend', $this->msg( 'signupend' )->parse() );
1139                 }
1140
1141                 // Give authentication and captcha plugins a chance to modify the form
1142                 $wgAuth->modifyUITemplate( $template, $this->mType );
1143                 if ( $this->mType == 'signup' ) {
1144                         wfRunHooks( 'UserCreateForm', array( &$template ) );
1145                 } else {
1146                         wfRunHooks( 'UserLoginForm', array( &$template ) );
1147                 }
1148
1149                 $out = $this->getOutput();
1150                 $out->disallowUserJs(); // just in case...
1151                 $out->addTemplate( $template );
1152         }
1153
1154         /**
1155          * @private
1156          *
1157          * @param $user User
1158          *
1159          * @return Boolean
1160          */
1161         function showCreateOrLoginLink( &$user ) {
1162                 if( $this->mType == 'signup' ) {
1163                         return true;
1164                 } elseif( $user->isAllowed( 'createaccount' ) ) {
1165                         return true;
1166                 } else {
1167                         return false;
1168                 }
1169         }
1170
1171         /**
1172          * Check if a session cookie is present.
1173          *
1174          * This will not pick up a cookie set during _this_ request, but is meant
1175          * to ensure that the client is returning the cookie which was set on a
1176          * previous pass through the system.
1177          *
1178          * @private
1179          * @return bool
1180          */
1181         function hasSessionCookie() {
1182                 global $wgDisableCookieCheck;
1183                 return $wgDisableCookieCheck ? true : $this->getRequest()->checkSessionCookie();
1184         }
1185
1186         /**
1187          * Get the login token from the current session
1188          * @return Mixed
1189          */
1190         public static function getLoginToken() {
1191                 global $wgRequest;
1192                 return $wgRequest->getSessionData( 'wsLoginToken' );
1193         }
1194
1195         /**
1196          * Randomly generate a new login token and attach it to the current session
1197          */
1198         public static function setLoginToken() {
1199                 global $wgRequest;
1200                 // Generate a token directly instead of using $user->editToken()
1201                 // because the latter reuses $_SESSION['wsEditToken']
1202                 $wgRequest->setSessionData( 'wsLoginToken', MWCryptRand::generateHex( 32 ) );
1203         }
1204
1205         /**
1206          * Remove any login token attached to the current session
1207          */
1208         public static function clearLoginToken() {
1209                 global $wgRequest;
1210                 $wgRequest->setSessionData( 'wsLoginToken', null );
1211         }
1212
1213         /**
1214          * Get the createaccount token from the current session
1215          * @return Mixed
1216          */
1217         public static function getCreateaccountToken() {
1218                 global $wgRequest;
1219                 return $wgRequest->getSessionData( 'wsCreateaccountToken' );
1220         }
1221
1222         /**
1223          * Randomly generate a new createaccount token and attach it to the current session
1224          */
1225         public static function setCreateaccountToken() {
1226                 global $wgRequest;
1227                 $wgRequest->setSessionData( 'wsCreateaccountToken', MWCryptRand::generateHex( 32 ) );
1228         }
1229
1230         /**
1231          * Remove any createaccount token attached to the current session
1232          */
1233         public static function clearCreateaccountToken() {
1234                 global $wgRequest;
1235                 $wgRequest->setSessionData( 'wsCreateaccountToken', null );
1236         }
1237
1238         /**
1239          * @private
1240          */
1241         function cookieRedirectCheck( $type ) {
1242                 $titleObj = SpecialPage::getTitleFor( 'Userlogin' );
1243                 $query = array( 'wpCookieCheck' => $type );
1244                 if ( $this->mReturnTo !== '' ) {
1245                         $query['returnto'] = $this->mReturnTo;
1246                         $query['returntoquery'] = $this->mReturnToQuery;
1247                 }
1248                 $check = $titleObj->getFullURL( $query );
1249
1250                 $this->getOutput()->redirect( $check );
1251         }
1252
1253         /**
1254          * @private
1255          */
1256         function onCookieRedirectCheck( $type ) {
1257                 if ( !$this->hasSessionCookie() ) {
1258                         if ( $type == 'new' ) {
1259                                 $this->mainLoginForm( $this->msg( 'nocookiesnew' )->parse() );
1260                         } elseif ( $type == 'login' ) {
1261                                 $this->mainLoginForm( $this->msg( 'nocookieslogin' )->parse() );
1262                         } else {
1263                                 # shouldn't happen
1264                                 $this->mainLoginForm( $this->msg( 'error' )->text() );
1265                         }
1266                 } else {
1267                         $this->successfulLogin();
1268                 }
1269         }
1270
1271         /**
1272          * @private
1273          */
1274         function throttleHit( $limit ) {
1275                 $this->mainLoginForm( $this->msg( 'acct_creation_throttle_hit' )->numParams( $limit )->parse() );
1276         }
1277
1278         /**
1279          * Produce a bar of links which allow the user to select another language
1280          * during login/registration but retain "returnto"
1281          *
1282          * @return string
1283          */
1284         function makeLanguageSelector() {
1285                 $msg = $this->msg( 'loginlanguagelinks' )->inContentLanguage();
1286                 if( !$msg->isBlank() ) {
1287                         $langs = explode( "\n", $msg->text() );
1288                         $links = array();
1289                         foreach( $langs as $lang ) {
1290                                 $lang = trim( $lang, '* ' );
1291                                 $parts = explode( '|', $lang );
1292                                 if ( count( $parts ) >= 2 ) {
1293                                         $links[] = $this->makeLanguageSelectorLink( $parts[0], trim( $parts[1] ) );
1294                                 }
1295                         }
1296                         return count( $links ) > 0 ? $this->msg( 'loginlanguagelabel' )->rawParams(
1297                                 $this->getLanguage()->pipeList( $links ) )->escaped() : '';
1298                 } else {
1299                         return '';
1300                 }
1301         }
1302
1303         /**
1304          * Create a language selector link for a particular language
1305          * Links back to this page preserving type and returnto
1306          *
1307          * @param $text Link text
1308          * @param $lang Language code
1309          * @return string
1310          */
1311         function makeLanguageSelectorLink( $text, $lang ) {
1312                 if( $this->getLanguage()->getCode() == $lang ) {
1313                         // no link for currently used language
1314                         return htmlspecialchars( $text );
1315                 }
1316                 $query = array( 'uselang' => $lang );
1317                 if( $this->mType == 'signup' ) {
1318                         $query['type'] = 'signup';
1319                 }
1320                 if( $this->mReturnTo !== '' ) {
1321                         $query['returnto'] = $this->mReturnTo;
1322                         $query['returntoquery'] = $this->mReturnToQuery;
1323                 }
1324
1325                 $attr = array();
1326                 $targetLanguage = Language::factory( $lang );
1327                 $attr['lang'] = $attr['hreflang'] = $targetLanguage->getHtmlCode();
1328
1329                 return Linker::linkKnown(
1330                         $this->getTitle(),
1331                         htmlspecialchars( $text ),
1332                         $attr,
1333                         $query
1334                 );
1335         }
1336 }