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
 446                 $status = $this->initUser( $u, false );
 447                 if ( !$status->isOK() ) {
 448                         $this->mainLoginForm( $status->getHTML() );
 449                         return false;
 450                 }
 451                 return $status->value;
 452         }
 453
 454         /**
 455          * Actually add a user to the database.
 456          * Give it a User object that has been initialised with a name.
 457          *
 458          * @param $u User object.
 459          * @param $autocreate boolean -- true if this is an autocreation via auth plugin
 460          * @return Status object, with the User object in the value member on success
 461          * @private
 462          */
 463         function initUser( $u, $autocreate ) {
 464                 global $wgAuth;
 465
 466                 $status = $u->addToDatabase();
 467                 if ( !$status->isOK() ) {
 468                         return $status;
 469                 }
 470
 471                 if ( $wgAuth->allowPasswordChange() ) {
 472                         $u->setPassword( $this->mPassword );
 473                 }
 474
 475                 $u->setEmail( $this->mEmail );
 476                 $u->setRealName( $this->mRealName );
 477                 $u->setToken();
 478
 479                 $wgAuth->initUser( $u, $autocreate );
 480
 481                 if ( $this->mExtUser ) {
 482                         $this->mExtUser->linkToLocal( $u->getId() );
 483                         $email = $this->mExtUser->getPref( 'emailaddress' );
 484                         if ( $email && !$this->mEmail ) {
 485                                 $u->setEmail( $email );
 486                         }
 487                 }
 488
 489                 $u->setOption( 'rememberpassword', $this->mRemember ? 1 : 0 );
 490                 $u->saveSettings();
 491
 492                 # Update user count
 493                 DeferredUpdates::addUpdate( new SiteStatsUpdate( 0, 0, 0, 0, 1 ) );
 494
 495                 return Status::newGood( $u );
 496         }
 497
 498         /**
 499          * Internally authenticate the login request.
 500          *
 501          * This may create a local account as a side effect if the
 502          * authentication plugin allows transparent local account
 503          * creation.
 504          * @return int
 505          */
 506         public function authenticateUserData() {
 507                 global $wgUser, $wgAuth;
 508
 509                 $this->load();
 510
 511                 if ( $this->mUsername == '' ) {
 512                         return self::NO_NAME;
 513                 }
 514
 515                 // We require a login token to prevent login CSRF
 516                 // Handle part of this before incrementing the throttle so
 517                 // token-less login attempts don't count towards the throttle
 518                 // but wrong-token attempts do.
 519
 520                 // If the user doesn't have a login token yet, set one.
 521                 if ( !self::getLoginToken() ) {
 522                         self::setLoginToken();
 523                         return self::NEED_TOKEN;
 524                 }
 525                 // If the user didn't pass a login token, tell them we need one
 526                 if ( !$this->mToken ) {
 527                         return self::NEED_TOKEN;
 528                 }
 529
 530                 $throttleCount = self::incLoginThrottle( $this->mUsername );
 531                 if ( $throttleCount === true ) {
 532                         return self::THROTTLED;
 533                 }
 534
 535                 // Validate the login token
 536                 if ( $this->mToken !== self::getLoginToken() ) {
 537                         return self::WRONG_TOKEN;
 538                 }
 539
 540                 // Load the current user now, and check to see if we're logging in as
 541                 // the same name. This is necessary because loading the current user
 542                 // (say by calling getName()) calls the UserLoadFromSession hook, which
 543                 // potentially creates the user in the database. Until we load $wgUser,
 544                 // checking for user existence using User::newFromName($name)->getId() below
 545                 // will effectively be using stale data.
 546                 if ( $this->getUser()->getName() === $this->mUsername ) {
 547                         wfDebug( __METHOD__ . ": already logged in as {$this->mUsername}\n" );
 548                         return self::SUCCESS;
 549                 }
 550
 551                 $this->mExtUser = ExternalUser::newFromName( $this->mUsername );
 552
 553                 # TODO: Allow some magic here for invalid external names, e.g., let the
 554                 # user choose a different wiki name.
 555                 $u = User::newFromName( $this->mUsername );
 556                 if( !( $u instanceof User ) || !User::isUsableName( $u->getName() ) ) {
 557                         return self::ILLEGAL;
 558                 }
 559
 560                 $isAutoCreated = false;
 561                 if ( 0 == $u->getID() ) {
 562                         $status = $this->attemptAutoCreate( $u );
 563                         if ( $status !== self::SUCCESS ) {
 564                                 return $status;
 565                         } else {
 566                                 $isAutoCreated = true;
 567                         }
 568                 } else {
 569                         global $wgExternalAuthType, $wgAutocreatePolicy;
 570                         if ( $wgExternalAuthType && $wgAutocreatePolicy != 'never'
 571                         && is_object( $this->mExtUser )
 572                         && $this->mExtUser->authenticate( $this->mPassword ) ) {
 573                                 # The external user and local user have the same name and
 574                                 # password, so we assume they're the same.
 575                                 $this->mExtUser->linkToLocal( $u->getID() );
 576                         }
 577
 578                         $u->load();
 579                 }
 580
 581                 // Give general extensions, such as a captcha, a chance to abort logins
 582                 $abort = self::ABORTED;
 583                 if( !wfRunHooks( 'AbortLogin', array( $u, $this->mPassword, &$abort, &$this->mAbortLoginErrorMsg ) ) ) {
 584                         return $abort;
 585                 }
 586
 587                 global $wgBlockDisablesLogin;
 588                 if ( !$u->checkPassword( $this->mPassword ) ) {
 589                         if( $u->checkTemporaryPassword( $this->mPassword ) ) {
 590                                 // The e-mailed temporary password should not be used for actu-
 591                                 // al logins; that's a very sloppy habit, and insecure if an
 592                                 // attacker has a few seconds to click "search" on someone's o-
 593                                 // pen mail reader.
 594                                 //
 595                                 // Allow it to be used only to reset the password a single time
 596                                 // to a new value, which won't be in the user's e-mail ar-
 597                                 // chives.
 598                                 //
 599                                 // For backwards compatibility, we'll still recognize it at the
 600                                 // login form to minimize surprises for people who have been
 601                                 // logging in with a temporary password for some time.
 602                                 //
 603                                 // As a side-effect, we can authenticate the user's e-mail ad-
 604                                 // dress if it's not already done, since the temporary password
 605                                 // was sent via e-mail.
 606                                 if( !$u->isEmailConfirmed() ) {
 607                                         $u->confirmEmail();
 608                                         $u->saveSettings();
 609                                 }
 610
 611                                 // At this point we just return an appropriate code/ indicating
 612                                 // that the UI should show a password reset form; bot inter-
 613                                 // faces etc will probably just fail cleanly here.
 614                                 $retval = self::RESET_PASS;
 615                         } else {
 616                                 $retval = ( $this->mPassword  == '' ) ? self::EMPTY_PASS : self::WRONG_PASS;
 617                         }
 618                 } elseif ( $wgBlockDisablesLogin && $u->isBlocked() ) {
 619                         // If we've enabled it, make it so that a blocked user cannot login
 620                         $retval = self::USER_BLOCKED;
 621                 } else {
 622                         $wgAuth->updateUser( $u );
 623                         $wgUser = $u;
 624                         // This should set it for OutputPage and the Skin
 625                         // which is needed or the personal links will be
 626                         // wrong.
 627                         $this->getContext()->setUser( $u );
 628
 629                         // Please reset throttle for successful logins, thanks!
 630                         if ( $throttleCount ) {
 631                                 self::clearLoginThrottle( $this->mUsername );
 632                         }
 633
 634                         if ( $isAutoCreated ) {
 635                                 // Must be run after $wgUser is set, for correct new user log
 636                                 wfRunHooks( 'AuthPluginAutoCreate', array( $u ) );
 637                         }
 638
 639                         $retval = self::SUCCESS;
 640                 }
 641                 wfRunHooks( 'LoginAuthenticateAudit', array( $u, $this->mPassword, $retval ) );
 642                 return $retval;
 643         }
 644
 645         /**
 646          * Increment the login attempt throttle hit count for the (username,current IP)
 647          * tuple unless the throttle was already reached.
 648          * @param $username string The user name
 649          * @return Bool|Integer The integer hit count or True if it is already at the limit
 650          */
 651         public static function incLoginThrottle( $username ) {
 652                 global $wgPasswordAttemptThrottle, $wgMemc, $wgRequest;
 653                 $username = trim( $username ); // sanity
 654
 655                 $throttleCount = 0;
 656                 if ( is_array( $wgPasswordAttemptThrottle ) ) {
 657                         $throttleKey = wfMemcKey( 'password-throttle', $wgRequest->getIP(), md5( $username ) );
 658                         $count = $wgPasswordAttemptThrottle['count'];
 659                         $period = $wgPasswordAttemptThrottle['seconds'];
 660
 661                         $throttleCount = $wgMemc->get( $throttleKey );
 662                         if ( !$throttleCount ) {
 663                                 $wgMemc->add( $throttleKey, 1, $period ); // start counter
 664                         } elseif ( $throttleCount < $count ) {
 665                                 $wgMemc->incr( $throttleKey );
 666                         } elseif ( $throttleCount >= $count ) {
 667                                 return true;
 668                         }
 669                 }
 670
 671                 return $throttleCount;
 672         }
 673
 674         /**
 675          * Clear the login attempt throttle hit count for the (username,current IP) tuple.
 676          * @param $username string The user name
 677          * @return void
 678          */
 679         public static function clearLoginThrottle( $username ) {
 680                 global $wgMemc, $wgRequest;
 681                 $username = trim( $username ); // sanity
 682
 683                 $throttleKey = wfMemcKey( 'password-throttle', $wgRequest->getIP(), md5( $username ) );
 684                 $wgMemc->delete( $throttleKey );
 685         }
 686
 687         /**
 688          * Attempt to automatically create a user on login. Only succeeds if there
 689          * is an external authentication method which allows it.
 690          *
 691          * @param $user User
 692          *
 693          * @return integer Status code
 694          */
 695         function attemptAutoCreate( $user ) {
 696                 global $wgAuth, $wgAutocreatePolicy;
 697
 698                 if ( $this->getUser()->isBlockedFromCreateAccount() ) {
 699                         wfDebug( __METHOD__ . ": user is blocked from account creation\n" );
 700                         return self::CREATE_BLOCKED;
 701                 }
 702
 703                 /**
 704                  * If the external authentication plugin allows it, automatically cre-
 705                  * ate a new account for users that are externally defined but have not
 706                  * yet logged in.
 707                  */
 708                 if ( $this->mExtUser ) {
 709                         # mExtUser is neither null nor false, so use the new ExternalAuth
 710                         # system.
 711                         if ( $wgAutocreatePolicy == 'never' ) {
 712                                 return self::NOT_EXISTS;
 713                         }
 714                         if ( !$this->mExtUser->authenticate( $this->mPassword ) ) {
 715                                 return self::WRONG_PLUGIN_PASS;
 716                         }
 717                 } else {
 718                         # Old AuthPlugin.
 719                         if ( !$wgAuth->autoCreate() ) {
 720                                 return self::NOT_EXISTS;
 721                         }
 722                         if ( !$wgAuth->userExists( $user->getName() ) ) {
 723                                 wfDebug( __METHOD__ . ": user does not exist\n" );
 724                                 return self::NOT_EXISTS;
 725                         }
 726                         if ( !$wgAuth->authenticate( $user->getName(), $this->mPassword ) ) {
 727                                 wfDebug( __METHOD__ . ": \$wgAuth->authenticate() returned false, aborting\n" );
 728                                 return self::WRONG_PLUGIN_PASS;
 729                         }
 730                 }
 731
 732                 $abortError = '';
 733                 if( !wfRunHooks( 'AbortAutoAccount', array( $user, &$abortError ) ) ) {
 734                         // Hook point to add extra creation throttles and blocks
 735                         wfDebug( "LoginForm::attemptAutoCreate: a hook blocked creation: $abortError\n" );
 736                         $this->mAbortLoginErrorMsg = $abortError;
 737                         return self::ABORTED;
 738                 }
 739
 740                 wfDebug( __METHOD__ . ": creating account\n" );
 741                 $status = $this->initUser( $user, true );
 742
 743                 if ( !$status->isOK() ) {
 744                         $errors = $status->getErrorsByType( 'error' );
 745                         $this->mAbortLoginErrorMsg = $errors[0]['message'];
 746                         return self::ABORTED;
 747                 }
 748
 749                 return self::SUCCESS;
 750         }
 751
 752         function processLogin() {
 753                 global $wgMemc, $wgLang;
 754
 755                 switch ( $this->authenticateUserData() ) {
 756                         case self::SUCCESS:
 757                                 global $wgSecureLogin;
 758                                 # We've verified now, update the real record
 759                                 $user = $this->getUser();
 760                                 if( (bool)$this->mRemember != (bool)$user->getOption( 'rememberpassword' ) ) {
 761                                         $user->setOption( 'rememberpassword', $this->mRemember ? 1 : 0 );
 762                                         $user->saveSettings();
 763                                 } else {
 764                                         $user->invalidateCache();
 765                                 }
 766
 767                                 if( $wgSecureLogin && !$this->mStickHTTPS ) {
 768                                         $user->setCookies( null, false );
 769                                 } else {
 770                                         $user->setCookies();
 771                                 }
 772                                 self::clearLoginToken();
 773
 774                                 // Reset the throttle
 775                                 $request = $this->getRequest();
 776                                 $key = wfMemcKey( 'password-throttle', $request->getIP(), md5( $this->mUsername ) );
 777                                 $wgMemc->delete( $key );
 778
 779                                 if( $this->hasSessionCookie() || $this->mSkipCookieCheck ) {
 780                                         /* Replace the language object to provide user interface in
 781                                          * correct language immediately on this first page load.
 782                                          */
 783                                         $code = $request->getVal( 'uselang', $user->getOption( 'language' ) );
 784                                         $userLang = Language::factory( $code );
 785                                         $wgLang = $userLang;
 786                                         $this->getContext()->setLanguage( $userLang );
 787                                         $this->successfulLogin();
 788                                 } else {
 789                                         $this->cookieRedirectCheck( 'login' );
 790                                 }
 791                                 break;
 792
 793                         case self::NEED_TOKEN:
 794                                 $this->mainLoginForm( $this->msg( 'nocookiesforlogin' )->parse() );
 795                                 break;
 796                         case self::WRONG_TOKEN:
 797                                 $this->mainLoginForm( $this->msg( 'sessionfailure' )->text() );
 798                                 break;
 799                         case self::NO_NAME:
 800                         case self::ILLEGAL:
 801                                 $this->mainLoginForm( $this->msg( 'noname' )->text() );
 802                                 break;
 803                         case self::WRONG_PLUGIN_PASS:
 804                                 $this->mainLoginForm( $this->msg( 'wrongpassword' )->text() );
 805                                 break;
 806                         case self::NOT_EXISTS:
 807                                 if( $this->getUser()->isAllowed( 'createaccount' ) ) {
 808                                         $this->mainLoginForm( $this->msg( 'nosuchuser',
 809                                                 wfEscapeWikiText( $this->mUsername ) )->parse() );
 810                                 } else {
 811                                         $this->mainLoginForm( $this->msg( 'nosuchusershort',
 812                                                 wfEscapeWikiText( $this->mUsername ) )->text() );
 813                                 }
 814                                 break;
 815                         case self::WRONG_PASS:
 816                                 $this->mainLoginForm( $this->msg( 'wrongpassword' )->text() );
 817                                 break;
 818                         case self::EMPTY_PASS:
 819                                 $this->mainLoginForm( $this->msg( 'wrongpasswordempty' )->text() );
 820                                 break;
 821                         case self::RESET_PASS:
 822                                 $this->resetLoginForm( $this->msg( 'resetpass_announce' )->text() );
 823                                 break;
 824                         case self::CREATE_BLOCKED:
 825                                 $this->userBlockedMessage( $this->getUser()->mBlock );
 826                                 break;
 827                         case self::THROTTLED:
 828                                 $this->mainLoginForm( $this->msg( 'login-throttled' )->text() );
 829                                 break;
 830                         case self::USER_BLOCKED:
 831                                 $this->mainLoginForm( $this->msg( 'login-userblocked',
 832                                         $this->mUsername )->escaped() );
 833                                 break;
 834                         case self::ABORTED:
 835                                 $this->mainLoginForm( $this->msg( $this->mAbortLoginErrorMsg )->text() );
 836                                 break;
 837                         default:
 838                                 throw new MWException( 'Unhandled case value' );
 839                 }
 840         }
 841
 842         function resetLoginForm( $error ) {
 843                 $this->getOutput()->addHTML( Xml::element('p', array( 'class' => 'error' ), $error ) );
 844                 $reset = new SpecialChangePassword();
 845                 $reset->setContext( $this->getContext() );
 846                 $reset->execute( null );
 847         }
 848
 849         /**
 850          * @param $u User object
 851          * @param $throttle Boolean
 852          * @param $emailTitle String: message name of email title
 853          * @param $emailText String: message name of email text
 854          * @return Status object
 855          */
 856         function mailPasswordInternal( $u, $throttle = true, $emailTitle = 'passwordremindertitle', $emailText = 'passwordremindertext' ) {
 857                 global $wgServer, $wgScript, $wgNewPasswordExpiry;
 858
 859                 if ( $u->getEmail() == '' ) {
 860                         return Status::newFatal( 'noemail', $u->getName() );
 861                 }
 862                 $ip = $this->getRequest()->getIP();
 863                 if( !$ip ) {
 864                         return Status::newFatal( 'badipaddress' );
 865                 }
 866
 867                 $currentUser = $this->getUser();
 868                 wfRunHooks( 'User::mailPasswordInternal', array( &$currentUser, &$ip, &$u ) );
 869
 870                 $np = $u->randomPassword();
 871                 $u->setNewpassword( $np, $throttle );
 872                 $u->saveSettings();
 873                 $userLanguage = $u->getOption( 'language' );
 874                 $m = $this->msg( $emailText, $ip, $u->getName(), $np, '<' . $wgServer . $wgScript . '>',
 875                         round( $wgNewPasswordExpiry / 86400 ) )->inLanguage( $userLanguage )->text();
 876                 $result = $u->sendMail( $this->msg( $emailTitle )->inLanguage( $userLanguage )->text(), $m );
 877
 878                 return $result;
 879         }
 880
 881
 882         /**
 883          * Run any hooks registered for logins, then HTTP redirect to
 884          * $this->mReturnTo (or Main Page if that's undefined).  Formerly we had a
 885          * nice message here, but that's really not as useful as just being sent to
 886          * wherever you logged in from.  It should be clear that the action was
 887          * successful, given the lack of error messages plus the appearance of your
 888          * name in the upper right.
 889          *
 890          * @private
 891          */
 892         function successfulLogin() {
 893                 # Run any hooks; display injected HTML if any, else redirect
 894                 $currentUser = $this->getUser();
 895                 $injected_html = '';
 896                 wfRunHooks( 'UserLoginComplete', array( &$currentUser, &$injected_html ) );
 897
 898                 if( $injected_html !== '' ) {
 899                         $this->displaySuccessfulLogin( 'loginsuccess', $injected_html );
 900                 } else {
 901                         $this->executeReturnTo( 'successredirect' );
 902                 }
 903         }
 904
 905         /**
 906          * Run any hooks registered for logins, then display a message welcoming
 907          * the user.
 908          *
 909          * @private
 910          */
 911         function successfulCreation() {
 912                 # Run any hooks; display injected HTML
 913                 $currentUser = $this->getUser();
 914                 $injected_html = '';
 915                 $welcome_creation_msg = 'welcomecreation';
 916
 917                 wfRunHooks( 'UserLoginComplete', array( &$currentUser, &$injected_html ) );
 918
 919                 /**
 920                  * Let any extensions change what message is shown.
 921                  * @see https://www.mediawiki.org/wiki/Manual:Hooks/BeforeWelcomeCreation
 922                  * @since 1.18
 923                  */
 924                 wfRunHooks( 'BeforeWelcomeCreation', array( &$welcome_creation_msg, &$injected_html ) );
 925
 926                 $this->displaySuccessfulLogin( $welcome_creation_msg, $injected_html );
 927         }
 928
 929         /**
 930          * Display a "login successful" page.
 931          * @param $msgname string
 932          * @param $injected_html string
 933          */
 934         private function displaySuccessfulLogin( $msgname, $injected_html ) {
 935                 $out = $this->getOutput();
 936                 $out->setPageTitle( $this->msg( 'loginsuccesstitle' ) );
 937                 if( $msgname ){
 938                         $out->addWikiMsg( $msgname, wfEscapeWikiText( $this->getUser()->getName() ) );
 939                 }
 940
 941                 $out->addHTML( $injected_html );
 942
 943                 $this->executeReturnTo( 'success' );
 944         }
 945
 946         /**
 947          * Output a message that informs the user that they cannot create an account because
 948          * there is a block on them or their IP which prevents account creation.  Note that
 949          * User::isBlockedFromCreateAccount(), which gets this block, ignores the 'hardblock'
 950          * setting on blocks (bug 13611).
 951          * @param $block Block the block causing this error
 952          */
 953         function userBlockedMessage( Block $block ) {
 954                 # Let's be nice about this, it's likely that this feature will be used
 955                 # for blocking large numbers of innocent people, e.g. range blocks on
 956                 # schools. Don't blame it on the user. There's a small chance that it
 957                 # really is the user's fault, i.e. the username is blocked and they
 958                 # haven't bothered to log out before trying to create an account to
 959                 # evade it, but we'll leave that to their guilty conscience to figure
 960                 # out.
 961
 962                 $out = $this->getOutput();
 963                 $out->setPageTitle( $this->msg( 'cantcreateaccounttitle' ) );
 964
 965                 $block_reason = $block->mReason;
 966                 if ( strval( $block_reason ) === '' ) {
 967                         $block_reason = $this->msg( 'blockednoreason' )->text();
 968                 }
 969
 970                 $out->addWikiMsg(
 971                         'cantcreateaccount-text',
 972                         $block->getTarget(),
 973                         $block_reason,
 974                         $block->getByName()
 975                 );
 976
 977                 $this->executeReturnTo( 'error' );
 978         }
 979
 980         /**
 981          * Add a "return to" link or redirect to it.
 982          *
 983          * @param $type string, one of the following:
 984          *    - error: display a return to link ignoring $wgRedirectOnLogin
 985          *    - success: display a return to link using $wgRedirectOnLogin if needed
 986          *    - successredirect: send an HTTP redirect using $wgRedirectOnLogin if needed
 987          */
 988         private function executeReturnTo( $type ) {
 989                 global $wgRedirectOnLogin, $wgSecureLogin;
 990
 991                 if ( $type != 'error' && $wgRedirectOnLogin !== null ) {
 992                         $returnTo = $wgRedirectOnLogin;
 993                         $returnToQuery = array();
 994                 } else {
 995                         $returnTo = $this->mReturnTo;
 996                         $returnToQuery = wfCgiToArray( $this->mReturnToQuery );
 997                 }
 998
 999                 $returnToTitle = Title::newFromText( $returnTo );
1000                 if ( !$returnToTitle ) {
1001                         $returnToTitle = Title::newMainPage();
1002                 }
1003
1004                 if ( $wgSecureLogin && !$this->mStickHTTPS ) {
1005                         $options = array( 'http' );
1006                         $proto = PROTO_HTTP;
1007                 } else {
1008                         $options = array( 'https' );
1009                         $proto = PROTO_HTTPS;
1010                 }
1011
1012                 if ( $type == 'successredirect' ) {
1013                         $redirectUrl = $returnToTitle->getFullURL( $returnToQuery, false, $proto );
1014                         $this->getOutput()->redirect( $redirectUrl );
1015                 } else {
1016                         $this->getOutput()->addReturnTo( $returnToTitle, $returnToQuery, null, $options );
1017                 }
1018         }
1019
1020         /**
1021          * @private
1022          */
1023         function mainLoginForm( $msg, $msgtype = 'error' ) {
1024                 global $wgEnableEmail, $wgEnableUserEmail;
1025                 global $wgHiddenPrefs, $wgLoginLanguageSelector;
1026                 global $wgAuth, $wgEmailConfirmToEdit, $wgCookieExpiration;
1027                 global $wgSecureLogin, $wgPasswordResetRoutes;
1028
1029                 $titleObj = $this->getTitle();
1030                 $user = $this->getUser();
1031
1032                 if ( $this->mType == 'signup' ) {
1033                         // Block signup here if in readonly. Keeps user from
1034                         // going through the process (filling out data, etc)
1035                         // and being informed later.
1036                         $permErrors = $titleObj->getUserPermissionsErrors( 'createaccount', $user, true );
1037                         if ( count( $permErrors ) ) {
1038                                 throw new PermissionsError( 'createaccount', $permErrors );
1039                         } elseif ( $user->isBlockedFromCreateAccount() ) {
1040                                 $this->userBlockedMessage( $user->isBlockedFromCreateAccount() );
1041                                 return;
1042                         } elseif ( wfReadOnly() ) {
1043                                 throw new ReadOnlyError;
1044                         }
1045                 }
1046
1047                 if ( $this->mUsername == '' ) {
1048                         if ( $user->isLoggedIn() ) {
1049                                 $this->mUsername = $user->getName();
1050                         } else {
1051                                 $this->mUsername = $this->getRequest()->getCookie( 'UserName' );
1052                         }
1053                 }
1054
1055                 if ( $this->mType == 'signup' ) {
1056                         $template = new UsercreateTemplate();
1057                         $q = 'action=submitlogin&type=signup';
1058                         $linkq = 'type=login';
1059                         $linkmsg = 'gotaccount';
1060                 } else {
1061                         $template = new UserloginTemplate();
1062                         $q = 'action=submitlogin&type=login';
1063                         $linkq = 'type=signup';
1064                         $linkmsg = 'nologin';
1065                 }
1066
1067                 if ( $this->mReturnTo !== '' ) {
1068                         $returnto = '&returnto=' . wfUrlencode( $this->mReturnTo );
1069                         if ( $this->mReturnToQuery !== '' ) {
1070                                 $returnto .= '&returntoquery=' .
1071                                         wfUrlencode( $this->mReturnToQuery );
1072                         }
1073                         $q .= $returnto;
1074                         $linkq .= $returnto;
1075                 }
1076
1077                 # Don't show a "create account" link if the user can't
1078                 if( $this->showCreateOrLoginLink( $user ) ) {
1079                         # Pass any language selection on to the mode switch link
1080                         if( $wgLoginLanguageSelector && $this->mLanguage ) {
1081                                 $linkq .= '&uselang=' . $this->mLanguage;
1082                         }
1083                         $link = Html::element( 'a', array( 'href' => $titleObj->getLocalURL( $linkq ) ),
1084                                 $this->msg( $linkmsg . 'link' )->text() ); # Calling either 'gotaccountlink' or 'nologinlink'
1085
1086                         $template->set( 'link', $this->msg( $linkmsg )->rawParams( $link )->parse() );
1087                 } else {
1088                         $template->set( 'link', '' );
1089                 }
1090
1091                 $resetLink = $this->mType == 'signup'
1092                         ? null
1093                         : is_array( $wgPasswordResetRoutes ) && in_array( true, array_values( $wgPasswordResetRoutes ) );
1094
1095                 $template->set( 'header', '' );
1096                 $template->set( 'name', $this->mUsername );
1097                 $template->set( 'password', $this->mPassword );
1098                 $template->set( 'retype', $this->mRetype );
1099                 $template->set( 'email', $this->mEmail );
1100                 $template->set( 'realname', $this->mRealName );
1101                 $template->set( 'domain', $this->mDomain );
1102                 $template->set( 'reason', $this->mReason );
1103
1104                 $template->set( 'action', $titleObj->getLocalURL( $q ) );
1105                 $template->set( 'message', $msg );
1106                 $template->set( 'messagetype', $msgtype );
1107                 $template->set( 'createemail', $wgEnableEmail && $user->isLoggedIn() );
1108                 $template->set( 'userealname', !in_array( 'realname', $wgHiddenPrefs ) );
1109                 $template->set( 'useemail', $wgEnableEmail );
1110                 $template->set( 'emailrequired', $wgEmailConfirmToEdit );
1111                 $template->set( 'emailothers', $wgEnableUserEmail );
1112                 $template->set( 'canreset', $wgAuth->allowPasswordChange() );
1113                 $template->set( 'resetlink', $resetLink );
1114                 $template->set( 'canremember', ( $wgCookieExpiration > 0 ) );
1115                 $template->set( 'usereason', $user->isLoggedIn() );
1116                 $template->set( 'remember', $user->getOption( 'rememberpassword' ) || $this->mRemember );
1117                 $template->set( 'cansecurelogin', ( $wgSecureLogin === true ) );
1118                 $template->set( 'stickHTTPS', $this->mStickHTTPS );
1119
1120                 if ( $this->mType == 'signup' ) {
1121                         if ( !self::getCreateaccountToken() ) {
1122                                 self::setCreateaccountToken();
1123                         }
1124                         $template->set( 'token', self::getCreateaccountToken() );
1125                 } else {
1126                         if ( !self::getLoginToken() ) {
1127                                 self::setLoginToken();
1128                         }
1129                         $template->set( 'token', self::getLoginToken() );
1130                 }
1131
1132                 # Prepare language selection links as needed
1133                 if( $wgLoginLanguageSelector ) {
1134                         $template->set( 'languages', $this->makeLanguageSelector() );
1135                         if( $this->mLanguage ) {
1136                                 $template->set( 'uselang', $this->mLanguage );
1137                         }
1138                 }
1139
1140                 // Use loginend-https for HTTPS requests if it's not blank, loginend otherwise
1141                 // Ditto for signupend
1142                 $usingHTTPS = WebRequest::detectProtocol() == 'https';
1143                 $loginendHTTPS = $this->msg( 'loginend-https' );
1144                 $signupendHTTPS = $this->msg( 'signupend-https' );
1145                 if ( $usingHTTPS && !$loginendHTTPS->isBlank() ) {
1146                         $template->set( 'loginend', $loginendHTTPS->parse() );
1147                 } else {
1148                         $template->set( 'loginend', $this->msg( 'loginend' )->parse() );
1149                 }
1150                 if ( $usingHTTPS && !$signupendHTTPS->isBlank() ) {
1151                         $template->set( 'signupend', $signupendHTTPS->parse() );
1152                 } else {
1153                         $template->set( 'signupend', $this->msg( 'signupend' )->parse() );
1154                 }
1155
1156                 // Give authentication and captcha plugins a chance to modify the form
1157                 $wgAuth->modifyUITemplate( $template, $this->mType );
1158                 if ( $this->mType == 'signup' ) {
1159                         wfRunHooks( 'UserCreateForm', array( &$template ) );
1160                 } else {
1161                         wfRunHooks( 'UserLoginForm', array( &$template ) );
1162                 }
1163
1164                 $out = $this->getOutput();
1165                 $out->disallowUserJs(); // just in case...
1166                 $out->addTemplate( $template );
1167         }
1168
1169         /**
1170          * @private
1171          *
1172          * @param $user User
1173          *
1174          * @return Boolean
1175          */
1176         function showCreateOrLoginLink( &$user ) {
1177                 if( $this->mType == 'signup' ) {
1178                         return true;
1179                 } elseif( $user->isAllowed( 'createaccount' ) ) {
1180                         return true;
1181                 } else {
1182                         return false;
1183                 }
1184         }
1185
1186         /**
1187          * Check if a session cookie is present.
1188          *
1189          * This will not pick up a cookie set during _this_ request, but is meant
1190          * to ensure that the client is returning the cookie which was set on a
1191          * previous pass through the system.
1192          *
1193          * @private
1194          * @return bool
1195          */
1196         function hasSessionCookie() {
1197                 global $wgDisableCookieCheck;
1198                 return $wgDisableCookieCheck ? true : $this->getRequest()->checkSessionCookie();
1199         }
1200
1201         /**
1202          * Get the login token from the current session
1203          * @return Mixed
1204          */
1205         public static function getLoginToken() {
1206                 global $wgRequest;
1207                 return $wgRequest->getSessionData( 'wsLoginToken' );
1208         }
1209
1210         /**
1211          * Randomly generate a new login token and attach it to the current session
1212          */
1213         public static function setLoginToken() {
1214                 global $wgRequest;
1215                 // Generate a token directly instead of using $user->editToken()
1216                 // because the latter reuses $_SESSION['wsEditToken']
1217                 $wgRequest->setSessionData( 'wsLoginToken', MWCryptRand::generateHex( 32 ) );
1218         }
1219
1220         /**
1221          * Remove any login token attached to the current session
1222          */
1223         public static function clearLoginToken() {
1224                 global $wgRequest;
1225                 $wgRequest->setSessionData( 'wsLoginToken', null );
1226         }
1227
1228         /**
1229          * Get the createaccount token from the current session
1230          * @return Mixed
1231          */
1232         public static function getCreateaccountToken() {
1233                 global $wgRequest;
1234                 return $wgRequest->getSessionData( 'wsCreateaccountToken' );
1235         }
1236
1237         /**
1238          * Randomly generate a new createaccount token and attach it to the current session
1239          */
1240         public static function setCreateaccountToken() {
1241                 global $wgRequest;
1242                 $wgRequest->setSessionData( 'wsCreateaccountToken', MWCryptRand::generateHex( 32 ) );
1243         }
1244
1245         /**
1246          * Remove any createaccount token attached to the current session
1247          */
1248         public static function clearCreateaccountToken() {
1249                 global $wgRequest;
1250                 $wgRequest->setSessionData( 'wsCreateaccountToken', null );
1251         }
1252
1253         /**
1254          * @private
1255          */
1256         function cookieRedirectCheck( $type ) {
1257                 $titleObj = SpecialPage::getTitleFor( 'Userlogin' );
1258                 $query = array( 'wpCookieCheck' => $type );
1259                 if ( $this->mReturnTo !== '' ) {
1260                         $query['returnto'] = $this->mReturnTo;
1261                         $query['returntoquery'] = $this->mReturnToQuery;
1262                 }
1263                 $check = $titleObj->getFullURL( $query );
1264
1265                 $this->getOutput()->redirect( $check );
1266         }
1267
1268         /**
1269          * @private
1270          */
1271         function onCookieRedirectCheck( $type ) {
1272                 if ( !$this->hasSessionCookie() ) {
1273                         if ( $type == 'new' ) {
1274                                 $this->mainLoginForm( $this->msg( 'nocookiesnew' )->parse() );
1275                         } elseif ( $type == 'login' ) {
1276                                 $this->mainLoginForm( $this->msg( 'nocookieslogin' )->parse() );
1277                         } else {
1278                                 # shouldn't happen
1279                                 $this->mainLoginForm( $this->msg( 'error' )->text() );
1280                         }
1281                 } else {
1282                         $this->successfulLogin();
1283                 }
1284         }
1285
1286         /**
1287          * @private
1288          */
1289         function throttleHit( $limit ) {
1290                 $this->mainLoginForm( $this->msg( 'acct_creation_throttle_hit' )->numParams( $limit )->parse() );
1291         }
1292
1293         /**
1294          * Produce a bar of links which allow the user to select another language
1295          * during login/registration but retain "returnto"
1296          *
1297          * @return string
1298          */
1299         function makeLanguageSelector() {
1300                 $msg = $this->msg( 'loginlanguagelinks' )->inContentLanguage();
1301                 if( !$msg->isBlank() ) {
1302                         $langs = explode( "\n", $msg->text() );
1303                         $links = array();
1304                         foreach( $langs as $lang ) {
1305                                 $lang = trim( $lang, '* ' );
1306                                 $parts = explode( '|', $lang );
1307                                 if ( count( $parts ) >= 2 ) {
1308                                         $links[] = $this->makeLanguageSelectorLink( $parts[0], trim( $parts[1] ) );
1309                                 }
1310                         }
1311                         return count( $links ) > 0 ? $this->msg( 'loginlanguagelabel' )->rawParams(
1312                                 $this->getLanguage()->pipeList( $links ) )->escaped() : '';
1313                 } else {
1314                         return '';
1315                 }
1316         }
1317
1318         /**
1319          * Create a language selector link for a particular language
1320          * Links back to this page preserving type and returnto
1321          *
1322          * @param $text Link text
1323          * @param $lang Language code
1324          * @return string
1325          */
1326         function makeLanguageSelectorLink( $text, $lang ) {
1327                 if( $this->getLanguage()->getCode() == $lang ) {
1328                         // no link for currently used language
1329                         return htmlspecialchars( $text );
1330                 }
1331                 $query = array( 'uselang' => $lang );
1332                 if( $this->mType == 'signup' ) {
1333                         $query['type'] = 'signup';
1334                 }
1335                 if( $this->mReturnTo !== '' ) {
1336                         $query['returnto'] = $this->mReturnTo;
1337                         $query['returntoquery'] = $this->mReturnToQuery;
1338                 }
1339
1340                 $attr = array();
1341                 $targetLanguage = Language::factory( $lang );
1342                 $attr['lang'] = $attr['hreflang'] = $targetLanguage->getHtmlCode();
1343
1344                 return Linker::linkKnown(
1345                         $this->getTitle(),
1346                         htmlspecialchars( $text ),
1347                         $attr,
1348                         $query
1349                 );
1350         }
1351 }