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