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->mCreateaccountMail = $request->getCheck( 'wpCreateaccountMail' )
  99                                                                         && $wgEnableEmail;
 100                 $this->mCreateaccount = $request->getCheck( 'wpCreateaccount' ) && !$this->mCreateaccountMail;
 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                 $status = $this->addNewaccountInternal();
 201                 if( !$status->isGood() ) {
 202                         $error = $this->getOutput()->parse( $status->getWikiText() );
 203                         $this->mainLoginForm( $error );
 204                         return false;
 205                 }
 206
 207                 $u = $status->getValue();
 208
 209                 // Wipe the initial password and mail a temporary one
 210                 $u->setPassword( null );
 211                 $u->saveSettings();
 212                 $result = $this->mailPasswordInternal( $u, false, 'createaccount-title', 'createaccount-text' );
 213
 214                 wfRunHooks( 'AddNewAccount', array( $u, true ) );
 215                 $u->addNewUserLogEntry( 'byemail', $this->mReason );
 216
 217                 $out = $this->getOutput();
 218                 $out->setPageTitle( $this->msg( 'accmailtitle' ) );
 219
 220                 if( !$result->isGood() ) {
 221                         $this->mainLoginForm( $this->msg( 'mailerror', $result->getWikiText() )->text() );
 222                 } else {
 223                         $out->addWikiMsg( 'accmailtext', $u->getName(), $u->getEmail() );
 224                         $this->executeReturnTo( 'success' );
 225                 }
 226         }
 227
 228         /**
 229          * @private
 230          * @return bool
 231          */
 232         function addNewAccount() {
 233                 global $wgUser, $wgEmailAuthentication, $wgLoginLanguageSelector;
 234
 235                 # Create the account and abort if there's a problem doing so
 236                 $status = $this->addNewAccountInternal();
 237                 if( !$status->isGood() ) {
 238                         $error = $this->getOutput()->parse( $status->getWikiText() );
 239                         $this->mainLoginForm( $error );
 240                         return false;
 241                 }
 242
 243                 $u = $status->getValue();
 244
 245                 # If we showed up language selection links, and one was in use, be
 246                 # smart (and sensible) and save that language as the user's preference
 247                 if( $wgLoginLanguageSelector && $this->mLanguage ) {
 248                         $u->setOption( 'language', $this->mLanguage );
 249                 }
 250
 251                 $out = $this->getOutput();
 252
 253                 # Send out an email authentication message if needed
 254                 if( $wgEmailAuthentication && Sanitizer::validateEmail( $u->getEmail() ) ) {
 255                         $status = $u->sendConfirmationMail();
 256                         if( $status->isGood() ) {
 257                                 $out->addWikiMsg( 'confirmemail_oncreate' );
 258                         } else {
 259                                 $out->addWikiText( $status->getWikiText( 'confirmemail_sendfailed' ) );
 260                         }
 261                 }
 262
 263                 # Save settings (including confirmation token)
 264                 $u->saveSettings();
 265
 266                 # If not logged in, assume the new account as the current one and set
 267                 # session cookies then show a "welcome" message or a "need cookies"
 268                 # message as needed
 269                 if( $this->getUser()->isAnon() ) {
 270                         $u->setCookies();
 271                         $wgUser = $u;
 272                         // This should set it for OutputPage and the Skin
 273                         // which is needed or the personal links will be
 274                         // wrong.
 275                         $this->getContext()->setUser( $u );
 276                         wfRunHooks( 'AddNewAccount', array( $u, false ) );
 277                         $u->addNewUserLogEntry( 'create' );
 278                         if( $this->hasSessionCookie() ) {
 279                                 $this->successfulCreation();
 280                         } else {
 281                                 $this->cookieRedirectCheck( 'new' );
 282                         }
 283                 } else {
 284                         # Confirm that the account was created
 285                         $out->setPageTitle( $this->msg( 'accountcreated' ) );
 286                         $out->addWikiMsg( 'accountcreatedtext', $u->getName() );
 287                         $out->addReturnTo( $this->getTitle() );
 288                         wfRunHooks( 'AddNewAccount', array( $u, false ) );
 289                         $u->addNewUserLogEntry( 'create2', $this->mReason );
 290                 }
 291                 return true;
 292         }
 293
 294         /**
 295          * Make a new user account using the loaded data.
 296          * @private
 297          * @throws PermissionsError|ReadOnlyError
 298          * @return Status
 299          */
 300         public function addNewAccountInternal() {
 301                 global $wgAuth, $wgMemc, $wgAccountCreationThrottle,
 302                         $wgMinimalPasswordLength, $wgEmailConfirmToEdit;
 303
 304                 // If the user passes an invalid domain, something is fishy
 305                 if( !$wgAuth->validDomain( $this->mDomain ) ) {
 306                         return Status::newFatal( 'wrongpassword' );
 307                 }
 308
 309                 // If we are not allowing users to login locally, we should be checking
 310                 // to see if the user is actually able to authenticate to the authenti-
 311                 // cation server before they create an account (otherwise, they can
 312                 // create a local account and login as any domain user). We only need
 313                 // to check this for domains that aren't local.
 314                 if( 'local' != $this->mDomain && $this->mDomain != '' ) {
 315                         if(
 316                                 !$wgAuth->canCreateAccounts() &&
 317                                 (
 318                                         !$wgAuth->userExists( $this->mUsername ) ||
 319                                         !$wgAuth->authenticate( $this->mUsername, $this->mPassword )
 320                                 )
 321                         ) {
 322                                 return Status::newFatal( 'wrongpassword' );
 323                         }
 324                 }
 325
 326                 if ( wfReadOnly() ) {
 327                         throw new ReadOnlyError;
 328                 }
 329
 330                 # Request forgery checks.
 331                 if ( !self::getCreateaccountToken() ) {
 332                         self::setCreateaccountToken();
 333                         return Status::newFatal( 'nocookiesfornew' );
 334                 }
 335
 336                 # The user didn't pass a createaccount token
 337                 if ( !$this->mToken ) {
 338                         return Status::newFatal( 'sessionfailure' );
 339                 }
 340
 341                 # Validate the createaccount token
 342                 if ( $this->mToken !== self::getCreateaccountToken() ) {
 343                         return Status::newFatal( 'sessionfailure' );
 344                 }
 345
 346                 # Check permissions
 347                 $currentUser = $this->getUser();
 348                 $creationBlock = $currentUser->isBlockedFromCreateAccount();
 349                 if ( !$currentUser->isAllowed( 'createaccount' ) ) {
 350                         throw new PermissionsError( 'createaccount' );
 351                 } elseif ( $creationBlock instanceof Block ) {
 352                         // Throws an ErrorPageError.
 353                         $this->userBlockedMessage( $creationBlock );
 354                         // This should never be reached.
 355                         return false;
 356                 }
 357
 358                 # Include checks that will include GlobalBlocking (Bug 38333)
 359                 $permErrors = $this->getTitle()->getUserPermissionsErrors( 'createaccount', $currentUser, true );
 360                 if ( count( $permErrors ) ) {
 361                                 throw new PermissionsError( 'createaccount', $permErrors );
 362                 }
 363
 364                 $ip = $this->getRequest()->getIP();
 365                 if ( $currentUser->isDnsBlacklisted( $ip, true /* check $wgProxyWhitelist */ ) ) {
 366                         return Status::newFatal( 'sorbs_create_account_reason' );
 367                 }
 368
 369                 # Now create a dummy user ($u) and check if it is valid
 370                 $name = trim( $this->mUsername );
 371                 $u = User::newFromName( $name, 'creatable' );
 372                 if ( !is_object( $u ) ) {
 373                         return Status::newFatal( 'noname' );
 374                 } elseif ( 0 != $u->idForName() ) {
 375                         return Status::newFatal( 'userexists' );
 376                 }
 377
 378                 if ( $this->mCreateaccountMail ) {
 379                         # do not force a password for account creation by email
 380                         # set invalid password, it will be replaced later by a random generated password
 381                         $this->mPassword = null;
 382                 } else {
 383                         if ( $this->mPassword !== $this->mRetype ) {
 384                                 return Status::newFatal( 'badretype' );
 385                         }
 386
 387                         # check for minimal password length
 388                         $valid = $u->getPasswordValidity( $this->mPassword );
 389                         if ( $valid !== true ) {
 390                                 if ( !is_array( $valid ) ) {
 391                                         $valid = array( $valid, $wgMinimalPasswordLength );
 392                                 }
 393                                 return call_user_func_array( 'Status::newFatal', $valid );
 394                         }
 395                 }
 396
 397                 # if you need a confirmed email address to edit, then obviously you
 398                 # need an email address.
 399                 if ( $wgEmailConfirmToEdit && strval( $this->mEmail ) === '' ) {
 400                         return Status::newFatal( 'noemailtitle' );
 401                 }
 402
 403                 if ( strval( $this->mEmail ) !== '' && !Sanitizer::validateEmail( $this->mEmail ) ) {
 404                         return Status::newFatal( 'invalidemailaddress' );
 405                 }
 406
 407                 # Set some additional data so the AbortNewAccount hook can be used for
 408                 # more than just username validation
 409                 $u->setEmail( $this->mEmail );
 410                 $u->setRealName( $this->mRealName );
 411
 412                 $abortError = '';
 413                 if( !wfRunHooks( 'AbortNewAccount', array( $u, &$abortError ) ) ) {
 414                         // Hook point to add extra creation throttles and blocks
 415                         wfDebug( "LoginForm::addNewAccountInternal: a hook blocked creation\n" );
 416                         return Status::newFatal( new RawMessage( $abortError ) );
 417                 }
 418
 419                 // Hook point to check for exempt from account creation throttle
 420                 if ( !wfRunHooks( 'ExemptFromAccountCreationThrottle', array( $ip ) ) ) {
 421                         wfDebug( "LoginForm::exemptFromAccountCreationThrottle: a hook allowed account creation w/o throttle\n" );
 422                 } else {
 423                         if ( ( $wgAccountCreationThrottle && $currentUser->isPingLimitable() ) ) {
 424                                 $key = wfMemcKey( 'acctcreate', 'ip', $ip );
 425                                 $value = $wgMemc->get( $key );
 426                                 if ( !$value ) {
 427                                         $wgMemc->set( $key, 0, 86400 );
 428                                 }
 429                                 if ( $value >= $wgAccountCreationThrottle ) {
 430                                         return Status::newFatal( 'acct_creation_throttle_hit', $wgAccountCreationThrottle );
 431                                 }
 432                                 $wgMemc->incr( $key );
 433                         }
 434                 }
 435
 436                 if( !$wgAuth->addUser( $u, $this->mPassword, $this->mEmail, $this->mRealName ) ) {
 437                         return Status::newFatal( 'externaldberror' );
 438                 }
 439
 440                 self::clearCreateaccountToken();
 441                 return $this->initUser( $u, false );
 442         }
 443
 444         /**
 445          * Actually add a user to the database.
 446          * Give it a User object that has been initialised with a name.
 447          *
 448          * @param $u User object.
 449          * @param $autocreate boolean -- true if this is an autocreation via auth plugin
 450          * @return Status object, with the User object in the value member on success
 451          * @private
 452          */
 453         function initUser( $u, $autocreate ) {
 454                 global $wgAuth;
 455
 456                 $status = $u->addToDatabase();
 457                 if ( !$status->isOK() ) {
 458                         return $status;
 459                 }
 460
 461                 if ( $wgAuth->allowPasswordChange() ) {
 462                         $u->setPassword( $this->mPassword );
 463                 }
 464
 465                 $u->setEmail( $this->mEmail );
 466                 $u->setRealName( $this->mRealName );
 467                 $u->setToken();
 468
 469                 $wgAuth->initUser( $u, $autocreate );
 470
 471                 if ( $this->mExtUser ) {
 472                         $this->mExtUser->linkToLocal( $u->getId() );
 473                         $email = $this->mExtUser->getPref( 'emailaddress' );
 474                         if ( $email && !$this->mEmail ) {
 475                                 $u->setEmail( $email );
 476                         }
 477                 }
 478
 479                 $u->setOption( 'rememberpassword', $this->mRemember ? 1 : 0 );
 480                 $u->saveSettings();
 481
 482                 # Update user count
 483                 DeferredUpdates::addUpdate( new SiteStatsUpdate( 0, 0, 0, 0, 1 ) );
 484
 485                 return Status::newGood( $u );
 486         }
 487
 488         /**
 489          * Internally authenticate the login request.
 490          *
 491          * This may create a local account as a side effect if the
 492          * authentication plugin allows transparent local account
 493          * creation.
 494          * @return int
 495          */
 496         public function authenticateUserData() {
 497                 global $wgUser, $wgAuth;
 498
 499                 $this->load();
 500
 501                 if ( $this->mUsername == '' ) {
 502                         return self::NO_NAME;
 503                 }
 504
 505                 // We require a login token to prevent login CSRF
 506                 // Handle part of this before incrementing the throttle so
 507                 // token-less login attempts don't count towards the throttle
 508                 // but wrong-token attempts do.
 509
 510                 // If the user doesn't have a login token yet, set one.
 511                 if ( !self::getLoginToken() ) {
 512                         self::setLoginToken();
 513                         return self::NEED_TOKEN;
 514                 }
 515                 // If the user didn't pass a login token, tell them we need one
 516                 if ( !$this->mToken ) {
 517                         return self::NEED_TOKEN;
 518                 }
 519
 520                 $throttleCount = self::incLoginThrottle( $this->mUsername );
 521                 if ( $throttleCount === true ) {
 522                         return self::THROTTLED;
 523                 }
 524
 525                 // Validate the login token
 526                 if ( $this->mToken !== self::getLoginToken() ) {
 527                         return self::WRONG_TOKEN;
 528                 }
 529
 530                 // Load the current user now, and check to see if we're logging in as
 531                 // the same name. This is necessary because loading the current user
 532                 // (say by calling getName()) calls the UserLoadFromSession hook, which
 533                 // potentially creates the user in the database. Until we load $wgUser,
 534                 // checking for user existence using User::newFromName($name)->getId() below
 535                 // will effectively be using stale data.
 536                 if ( $this->getUser()->getName() === $this->mUsername ) {
 537                         wfDebug( __METHOD__ . ": already logged in as {$this->mUsername}\n" );
 538                         return self::SUCCESS;
 539                 }
 540
 541                 $this->mExtUser = ExternalUser::newFromName( $this->mUsername );
 542
 543                 # TODO: Allow some magic here for invalid external names, e.g., let the
 544                 # user choose a different wiki name.
 545                 $u = User::newFromName( $this->mUsername );
 546                 if( !( $u instanceof User ) || !User::isUsableName( $u->getName() ) ) {
 547                         return self::ILLEGAL;
 548                 }
 549
 550                 $isAutoCreated = false;
 551                 if ( $u->getID() == 0 ) {
 552                         $status = $this->attemptAutoCreate( $u );
 553                         if ( $status !== self::SUCCESS ) {
 554                                 return $status;
 555                         } else {
 556                                 $isAutoCreated = true;
 557                         }
 558                 } else {
 559                         global $wgExternalAuthType, $wgAutocreatePolicy;
 560                         if ( $wgExternalAuthType && $wgAutocreatePolicy != 'never'
 561                                 && is_object( $this->mExtUser )
 562                                 && $this->mExtUser->authenticate( $this->mPassword )
 563                         ) {
 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                 $status = $this->initUser( $user, true );
 733
 734                 if ( !$status->isOK() ) {
 735                         $errors = $status->getErrorsByType( 'error' );
 736                         $this->mAbortLoginErrorMsg = $errors[0]['message'];
 737                         return self::ABORTED;
 738                 }
 739
 740                 return self::SUCCESS;
 741         }
 742
 743         function processLogin() {
 744                 global $wgMemc, $wgLang, $wgSecureLogin;
 745
 746                 switch ( $this->authenticateUserData() ) {
 747                         case self::SUCCESS:
 748                                 # We've verified now, update the real record
 749                                 $user = $this->getUser();
 750                                 if( (bool)$this->mRemember != $user->getBoolOption( 'rememberpassword' ) ) {
 751                                         $user->setOption( 'rememberpassword', $this->mRemember ? 1 : 0 );
 752                                         $user->saveSettings();
 753                                 } else {
 754                                         $user->invalidateCache();
 755                                 }
 756
 757                                 if( $wgSecureLogin && !$this->mStickHTTPS ) {
 758                                         $user->setCookies( null, false );
 759                                 } else {
 760                                         $user->setCookies();
 761                                 }
 762                                 self::clearLoginToken();
 763
 764                                 // Reset the throttle
 765                                 $request = $this->getRequest();
 766                                 $key = wfMemcKey( 'password-throttle', $request->getIP(), md5( $this->mUsername ) );
 767                                 $wgMemc->delete( $key );
 768
 769                                 if( $this->hasSessionCookie() || $this->mSkipCookieCheck ) {
 770                                         /* Replace the language object to provide user interface in
 771                                          * correct language immediately on this first page load.
 772                                          */
 773                                         $code = $request->getVal( 'uselang', $user->getOption( 'language' ) );
 774                                         $userLang = Language::factory( $code );
 775                                         $wgLang = $userLang;
 776                                         $this->getContext()->setLanguage( $userLang );
 777                                         // Reset SessionID on Successful login (bug 40995)
 778                                         $this->renewSessionId();
 779                                         $this->successfulLogin();
 780                                 } else {
 781                                         $this->cookieRedirectCheck( 'login' );
 782                                 }
 783                                 break;
 784
 785                         case self::NEED_TOKEN:
 786                                 $this->mainLoginForm( $this->msg( 'nocookiesforlogin' )->parse() );
 787                                 break;
 788                         case self::WRONG_TOKEN:
 789                                 $this->mainLoginForm( $this->msg( 'sessionfailure' )->text() );
 790                                 break;
 791                         case self::NO_NAME:
 792                         case self::ILLEGAL:
 793                                 $this->mainLoginForm( $this->msg( 'noname' )->text() );
 794                                 break;
 795                         case self::WRONG_PLUGIN_PASS:
 796                                 $this->mainLoginForm( $this->msg( 'wrongpassword' )->text() );
 797                                 break;
 798                         case self::NOT_EXISTS:
 799                                 if( $this->getUser()->isAllowed( 'createaccount' ) ) {
 800                                         $this->mainLoginForm( $this->msg( 'nosuchuser',
 801                                                 wfEscapeWikiText( $this->mUsername ) )->parse() );
 802                                 } else {
 803                                         $this->mainLoginForm( $this->msg( 'nosuchusershort',
 804                                                 wfEscapeWikiText( $this->mUsername ) )->text() );
 805                                 }
 806                                 break;
 807                         case self::WRONG_PASS:
 808                                 $this->mainLoginForm( $this->msg( 'wrongpassword' )->text() );
 809                                 break;
 810                         case self::EMPTY_PASS:
 811                                 $this->mainLoginForm( $this->msg( 'wrongpasswordempty' )->text() );
 812                                 break;
 813                         case self::RESET_PASS:
 814                                 $this->resetLoginForm( $this->msg( 'resetpass_announce' )->text() );
 815                                 break;
 816                         case self::CREATE_BLOCKED:
 817                                 $this->userBlockedMessage( $this->getUser()->mBlock );
 818                                 break;
 819                         case self::THROTTLED:
 820                                 $this->mainLoginForm( $this->msg( 'login-throttled' )->text() );
 821                                 break;
 822                         case self::USER_BLOCKED:
 823                                 $this->mainLoginForm( $this->msg( 'login-userblocked',
 824                                         $this->mUsername )->escaped() );
 825                                 break;
 826                         case self::ABORTED:
 827                                 $this->mainLoginForm( $this->msg( $this->mAbortLoginErrorMsg )->text() );
 828                                 break;
 829                         default:
 830                                 throw new MWException( 'Unhandled case value' );
 831                 }
 832         }
 833
 834         function resetLoginForm( $error ) {
 835                 $this->getOutput()->addHTML( Xml::element( 'p', array( 'class' => 'error' ), $error ) );
 836                 $reset = new SpecialChangePassword();
 837                 $reset->setContext( $this->getContext() );
 838                 $reset->execute( null );
 839         }
 840
 841         /**
 842          * @param $u User object
 843          * @param $throttle Boolean
 844          * @param $emailTitle String: message name of email title
 845          * @param $emailText String: message name of email text
 846          * @return Status object
 847          */
 848         function mailPasswordInternal( $u, $throttle = true, $emailTitle = 'passwordremindertitle', $emailText = 'passwordremindertext' ) {
 849                 global $wgCanonicalServer, $wgScript, $wgNewPasswordExpiry;
 850
 851                 if ( $u->getEmail() == '' ) {
 852                         return Status::newFatal( 'noemail', $u->getName() );
 853                 }
 854                 $ip = $this->getRequest()->getIP();
 855                 if( !$ip ) {
 856                         return Status::newFatal( 'badipaddress' );
 857                 }
 858
 859                 $currentUser = $this->getUser();
 860                 wfRunHooks( 'User::mailPasswordInternal', array( &$currentUser, &$ip, &$u ) );
 861
 862                 $np = $u->randomPassword();
 863                 $u->setNewpassword( $np, $throttle );
 864                 $u->saveSettings();
 865                 $userLanguage = $u->getOption( 'language' );
 866                 $m = $this->msg( $emailText, $ip, $u->getName(), $np, '<' . $wgCanonicalServer . $wgScript . '>',
 867                         round( $wgNewPasswordExpiry / 86400 ) )->inLanguage( $userLanguage )->text();
 868                 $result = $u->sendMail( $this->msg( $emailTitle )->inLanguage( $userLanguage )->text(), $m );
 869
 870                 return $result;
 871         }
 872
 873
 874         /**
 875          * Run any hooks registered for logins, then HTTP redirect to
 876          * $this->mReturnTo (or Main Page if that's undefined).  Formerly we had a
 877          * nice message here, but that's really not as useful as just being sent to
 878          * wherever you logged in from.  It should be clear that the action was
 879          * successful, given the lack of error messages plus the appearance of your
 880          * name in the upper right.
 881          *
 882          * @private
 883          */
 884         function successfulLogin() {
 885                 # Run any hooks; display injected HTML if any, else redirect
 886                 $currentUser = $this->getUser();
 887                 $injected_html = '';
 888                 wfRunHooks( 'UserLoginComplete', array( &$currentUser, &$injected_html ) );
 889
 890                 if( $injected_html !== '' ) {
 891                         $this->displaySuccessfulAction( $this->msg( 'loginsuccesstitle' ),
 892                                 'loginsuccess', $injected_html );
 893                 } else {
 894                         $this->executeReturnTo( 'successredirect' );
 895                 }
 896         }
 897
 898         /**
 899          * Run any hooks registered for logins, then display a message welcoming
 900          * the user.
 901          *
 902          * @private
 903          */
 904         function successfulCreation() {
 905                 # Run any hooks; display injected HTML
 906                 $currentUser = $this->getUser();
 907                 $injected_html = '';
 908                 $welcome_creation_msg = 'welcomecreation-msg';
 909
 910                 wfRunHooks( 'UserLoginComplete', array( &$currentUser, &$injected_html ) );
 911
 912                 /**
 913                  * Let any extensions change what message is shown.
 914                  * @see https://www.mediawiki.org/wiki/Manual:Hooks/BeforeWelcomeCreation
 915                  * @since 1.18
 916                  */
 917                 wfRunHooks( 'BeforeWelcomeCreation', array( &$welcome_creation_msg, &$injected_html ) );
 918
 919                 $this->displaySuccessfulAction( $this->msg( 'welcomeuser', $this->getUser()->getName() ),
 920                         $welcome_creation_msg, $injected_html );
 921         }
 922
 923         /**
 924          * Display an "successful action" page.
 925          *
 926          * @param $title string|Message page's title
 927          * @param $msgname string
 928          * @param $injected_html string
 929          */
 930         private function displaySuccessfulAction( $title, $msgname, $injected_html ) {
 931                 $out = $this->getOutput();
 932                 $out->setPageTitle( $title );
 933                 if ( $msgname ) {
 934                         $out->addWikiMsg( $msgname, wfEscapeWikiText( $this->getUser()->getName() ) );
 935                 }
 936
 937                 $out->addHTML( $injected_html );
 938
 939                 $this->executeReturnTo( 'success' );
 940         }
 941
 942         /**
 943          * Output a message that informs the user that they cannot create an account because
 944          * there is a block on them or their IP which prevents account creation.  Note that
 945          * User::isBlockedFromCreateAccount(), which gets this block, ignores the 'hardblock'
 946          * setting on blocks (bug 13611).
 947          * @param $block Block the block causing this error
 948          */
 949         function userBlockedMessage( Block $block ) {
 950                 # Let's be nice about this, it's likely that this feature will be used
 951                 # for blocking large numbers of innocent people, e.g. range blocks on
 952                 # schools. Don't blame it on the user. There's a small chance that it
 953                 # really is the user's fault, i.e. the username is blocked and they
 954                 # haven't bothered to log out before trying to create an account to
 955                 # evade it, but we'll leave that to their guilty conscience to figure
 956                 # out.
 957                 throw new ErrorPageError(
 958                         'cantcreateaccounttitle',
 959                         'cantcreateaccount-text',
 960                         array(
 961                                 $block->getTarget(),
 962                                 $block->mReason ? $block->mReason : $this->msg( 'blockednoreason' )->text(),
 963                                 $block->getByName()
 964                         )
 965                 );
 966         }
 967
 968         /**
 969          * Add a "return to" link or redirect to it.
 970          *
 971          * @param $type string, one of the following:
 972          *    - error: display a return to link ignoring $wgRedirectOnLogin
 973          *    - success: display a return to link using $wgRedirectOnLogin if needed
 974          *    - successredirect: send an HTTP redirect using $wgRedirectOnLogin if needed
 975          */
 976         private function executeReturnTo( $type ) {
 977                 global $wgRedirectOnLogin, $wgSecureLogin;
 978
 979                 if ( $type != 'error' && $wgRedirectOnLogin !== null ) {
 980                         $returnTo = $wgRedirectOnLogin;
 981                         $returnToQuery = array();
 982                 } else {
 983                         $returnTo = $this->mReturnTo;
 984                         $returnToQuery = wfCgiToArray( $this->mReturnToQuery );
 985                 }
 986
 987                 $returnToTitle = Title::newFromText( $returnTo );
 988                 if ( !$returnToTitle ) {
 989                         $returnToTitle = Title::newMainPage();
 990                 }
 991
 992                 if ( $wgSecureLogin && !$this->mStickHTTPS ) {
 993                         $options = array( 'http' );
 994                         $proto = PROTO_HTTP;
 995                 } elseif( $wgSecureLogin ) {
 996                         $options = array( 'https' );
 997                         $proto = PROTO_HTTPS;
 998                 } else {
 999                         $options = array();
1000                         $proto = PROTO_RELATIVE;
1001                 }
1002
1003                 if ( $type == 'successredirect' ) {
1004                         $redirectUrl = $returnToTitle->getFullURL( $returnToQuery, false, $proto );
1005                         $this->getOutput()->redirect( $redirectUrl );
1006                 } else {
1007                         $this->getOutput()->addReturnTo( $returnToTitle, $returnToQuery, null, $options );
1008                 }
1009         }
1010
1011         /**
1012          * @private
1013          */
1014         function mainLoginForm( $msg, $msgtype = 'error' ) {
1015                 global $wgEnableEmail, $wgEnableUserEmail;
1016                 global $wgHiddenPrefs, $wgLoginLanguageSelector;
1017                 global $wgAuth, $wgEmailConfirmToEdit, $wgCookieExpiration;
1018                 global $wgSecureLogin, $wgSecureLoginDefaultHTTPS, $wgPasswordResetRoutes;
1019
1020                 $titleObj = $this->getTitle();
1021                 $user = $this->getUser();
1022
1023                 if ( $this->mType == 'signup' ) {
1024                         // Block signup here if in readonly. Keeps user from
1025                         // going through the process (filling out data, etc)
1026                         // and being informed later.
1027                         $permErrors = $titleObj->getUserPermissionsErrors( 'createaccount', $user, true );
1028                         if ( count( $permErrors ) ) {
1029                                 throw new PermissionsError( 'createaccount', $permErrors );
1030                         } elseif ( $user->isBlockedFromCreateAccount() ) {
1031                                 $this->userBlockedMessage( $user->isBlockedFromCreateAccount() );
1032                                 return;
1033                         } elseif ( wfReadOnly() ) {
1034                                 throw new ReadOnlyError;
1035                         }
1036                 }
1037
1038                 // Pre-fill username (if not creating an account, bug 44775).
1039                 if ( $this->mUsername == '' && $this->mType != 'signup' ) {
1040                         if ( $user->isLoggedIn() ) {
1041                                 $this->mUsername = $user->getName();
1042                         } else {
1043                                 $this->mUsername = $this->getRequest()->getCookie( 'UserName' );
1044                         }
1045                 }
1046
1047                 if ( $this->mType == 'signup' ) {
1048                         $template = new UsercreateTemplate();
1049                         $q = 'action=submitlogin&type=signup';
1050                         $linkq = 'type=login';
1051                         $linkmsg = 'gotaccount';
1052                         $this->getOutput()->addModules( 'mediawiki.special.userlogin.signup' );
1053                 } else {
1054                         $template = new UserloginTemplate();
1055                         $q = 'action=submitlogin&type=login';
1056                         $linkq = 'type=signup';
1057                         $linkmsg = 'nologin';
1058                 }
1059
1060                 if ( $this->mReturnTo !== '' ) {
1061                         $returnto = '&returnto=' . wfUrlencode( $this->mReturnTo );
1062                         if ( $this->mReturnToQuery !== '' ) {
1063                                 $returnto .= '&returntoquery=' .
1064                                         wfUrlencode( $this->mReturnToQuery );
1065                         }
1066                         $q .= $returnto;
1067                         $linkq .= $returnto;
1068                 }
1069
1070                 # Don't show a "create account" link if the user can't
1071                 if( $this->showCreateOrLoginLink( $user ) ) {
1072                         # Pass any language selection on to the mode switch link
1073                         if( $wgLoginLanguageSelector && $this->mLanguage ) {
1074                                 $linkq .= '&uselang=' . $this->mLanguage;
1075                         }
1076                         $link = Html::element( 'a', array( 'href' => $titleObj->getLocalURL( $linkq ) ),
1077                                 $this->msg( $linkmsg . 'link' )->text() ); # Calling either 'gotaccountlink' or 'nologinlink'
1078
1079                         $template->set( 'link', $this->msg( $linkmsg )->rawParams( $link )->parse() );
1080                 } else {
1081                         $template->set( 'link', '' );
1082                 }
1083
1084                 // Decide if we default stickHTTPS on
1085                 if ( $wgSecureLoginDefaultHTTPS && $this->mAction != 'submitlogin' && !$this->mLoginattempt ) {
1086                         $this->mStickHTTPS = true;
1087                 }
1088
1089                 $resetLink = $this->mType == 'signup'
1090                         ? null
1091                         : is_array( $wgPasswordResetRoutes ) && in_array( true, array_values( $wgPasswordResetRoutes ) );
1092
1093                 $template->set( 'header', '' );
1094                 $template->set( 'name', $this->mUsername );
1095                 $template->set( 'password', $this->mPassword );
1096                 $template->set( 'retype', $this->mRetype );
1097                 $template->set( 'createemailset', $this->mCreateaccountMail );
1098                 $template->set( 'email', $this->mEmail );
1099                 $template->set( 'realname', $this->mRealName );
1100                 $template->set( 'domain', $this->mDomain );
1101                 $template->set( 'reason', $this->mReason );
1102
1103                 $template->set( 'action', $titleObj->getLocalURL( $q ) );
1104                 $template->set( 'message', $msg );
1105                 $template->set( 'messagetype', $msgtype );
1106                 $template->set( 'createemail', $wgEnableEmail && $user->isLoggedIn() );
1107                 $template->set( 'userealname', !in_array( 'realname', $wgHiddenPrefs ) );
1108                 $template->set( 'useemail', $wgEnableEmail );
1109                 $template->set( 'emailrequired', $wgEmailConfirmToEdit );
1110                 $template->set( 'emailothers', $wgEnableUserEmail );
1111                 $template->set( 'canreset', $wgAuth->allowPasswordChange() );
1112                 $template->set( 'resetlink', $resetLink );
1113                 $template->set( 'canremember', ( $wgCookieExpiration > 0 ) );
1114                 $template->set( 'usereason', $user->isLoggedIn() );
1115                 $template->set( 'remember', $user->getOption( 'rememberpassword' ) || $this->mRemember );
1116                 $template->set( 'cansecurelogin', ( $wgSecureLogin === true ) );
1117                 $template->set( 'stickHTTPS', $this->mStickHTTPS );
1118
1119                 if ( $this->mType == 'signup' ) {
1120                         if ( !self::getCreateaccountToken() ) {
1121                                 self::setCreateaccountToken();
1122                         }
1123                         $template->set( 'token', self::getCreateaccountToken() );
1124                 } else {
1125                         if ( !self::getLoginToken() ) {
1126                                 self::setLoginToken();
1127                         }
1128                         $template->set( 'token', self::getLoginToken() );
1129                 }
1130
1131                 # Prepare language selection links as needed
1132                 if( $wgLoginLanguageSelector ) {
1133                         $template->set( 'languages', $this->makeLanguageSelector() );
1134                         if( $this->mLanguage ) {
1135                                 $template->set( 'uselang', $this->mLanguage );
1136                         }
1137                 }
1138
1139                 // Use loginend-https for HTTPS requests if it's not blank, loginend otherwise
1140                 // Ditto for signupend
1141                 $usingHTTPS = WebRequest::detectProtocol() == 'https';
1142                 $loginendHTTPS = $this->msg( 'loginend-https' );
1143                 $signupendHTTPS = $this->msg( 'signupend-https' );
1144                 if ( $usingHTTPS && !$loginendHTTPS->isBlank() ) {
1145                         $template->set( 'loginend', $loginendHTTPS->parse() );
1146                 } else {
1147                         $template->set( 'loginend', $this->msg( 'loginend' )->parse() );
1148                 }
1149                 if ( $usingHTTPS && !$signupendHTTPS->isBlank() ) {
1150                         $template->set( 'signupend', $signupendHTTPS->parse() );
1151                 } else {
1152                         $template->set( 'signupend', $this->msg( 'signupend' )->parse() );
1153                 }
1154
1155                 // Give authentication and captcha plugins a chance to modify the form
1156                 $wgAuth->modifyUITemplate( $template, $this->mType );
1157                 if ( $this->mType == 'signup' ) {
1158                         wfRunHooks( 'UserCreateForm', array( &$template ) );
1159                 } else {
1160                         wfRunHooks( 'UserLoginForm', array( &$template ) );
1161                 }
1162
1163                 $out = $this->getOutput();
1164                 $out->disallowUserJs(); // just in case...
1165                 $out->addTemplate( $template );
1166         }
1167
1168         /**
1169          * @private
1170          *
1171          * @param $user User
1172          *
1173          * @return Boolean
1174          */
1175         function showCreateOrLoginLink( &$user ) {
1176                 if( $this->mType == 'signup' ) {
1177                         return true;
1178                 } elseif( $user->isAllowed( 'createaccount' ) ) {
1179                         return true;
1180                 } else {
1181                         return false;
1182                 }
1183         }
1184
1185         /**
1186          * Check if a session cookie is present.
1187          *
1188          * This will not pick up a cookie set during _this_ request, but is meant
1189          * to ensure that the client is returning the cookie which was set on a
1190          * previous pass through the system.
1191          *
1192          * @private
1193          * @return bool
1194          */
1195         function hasSessionCookie() {
1196                 global $wgDisableCookieCheck;
1197                 return $wgDisableCookieCheck ? true : $this->getRequest()->checkSessionCookie();
1198         }
1199
1200         /**
1201          * Get the login token from the current session
1202          * @return Mixed
1203          */
1204         public static function getLoginToken() {
1205                 global $wgRequest;
1206                 return $wgRequest->getSessionData( 'wsLoginToken' );
1207         }
1208
1209         /**
1210          * Randomly generate a new login token and attach it to the current session
1211          */
1212         public static function setLoginToken() {
1213                 global $wgRequest;
1214                 // Generate a token directly instead of using $user->editToken()
1215                 // because the latter reuses $_SESSION['wsEditToken']
1216                 $wgRequest->setSessionData( 'wsLoginToken', MWCryptRand::generateHex( 32 ) );
1217         }
1218
1219         /**
1220          * Remove any login token attached to the current session
1221          */
1222         public static function clearLoginToken() {
1223                 global $wgRequest;
1224                 $wgRequest->setSessionData( 'wsLoginToken', null );
1225         }
1226
1227         /**
1228          * Get the createaccount token from the current session
1229          * @return Mixed
1230          */
1231         public static function getCreateaccountToken() {
1232                 global $wgRequest;
1233                 return $wgRequest->getSessionData( 'wsCreateaccountToken' );
1234         }
1235
1236         /**
1237          * Randomly generate a new createaccount token and attach it to the current session
1238          */
1239         public static function setCreateaccountToken() {
1240                 global $wgRequest;
1241                 $wgRequest->setSessionData( 'wsCreateaccountToken', MWCryptRand::generateHex( 32 ) );
1242         }
1243
1244         /**
1245          * Remove any createaccount token attached to the current session
1246          */
1247         public static function clearCreateaccountToken() {
1248                 global $wgRequest;
1249                 $wgRequest->setSessionData( 'wsCreateaccountToken', null );
1250         }
1251
1252         /**
1253          * Renew the user's session id, using strong entropy
1254          */
1255         private function renewSessionId() {
1256                 global $wgSecureLogin, $wgCookieSecure;
1257                 if( $wgSecureLogin && !$this->mStickHTTPS ) {
1258                         $wgCookieSecure = false;
1259                 }
1260
1261                 // If either we don't trust PHP's entropy, or if we need
1262                 // to change cookie settings when logging in because of
1263                 // wpStickHTTPS, then change the session ID manually.
1264                 $cookieParams = session_get_cookie_params();
1265                 if ( wfCheckEntropy() && $wgCookieSecure == $cookieParams['secure'] ) {
1266                         session_regenerate_id( false );
1267                 } else {
1268                         $tmp = $_SESSION;
1269                         session_destroy();
1270                         wfSetupSession( MWCryptRand::generateHex( 32 ) );
1271                         $_SESSION = $tmp;
1272                 }
1273         }
1274
1275         /**
1276          * @private
1277          */
1278         function cookieRedirectCheck( $type ) {
1279                 $titleObj = SpecialPage::getTitleFor( 'Userlogin' );
1280                 $query = array( 'wpCookieCheck' => $type );
1281                 if ( $this->mReturnTo !== '' ) {
1282                         $query['returnto'] = $this->mReturnTo;
1283                         $query['returntoquery'] = $this->mReturnToQuery;
1284                 }
1285                 $check = $titleObj->getFullURL( $query );
1286
1287                 $this->getOutput()->redirect( $check );
1288         }
1289
1290         /**
1291          * @private
1292          */
1293         function onCookieRedirectCheck( $type ) {
1294                 if ( !$this->hasSessionCookie() ) {
1295                         if ( $type == 'new' ) {
1296                                 $this->mainLoginForm( $this->msg( 'nocookiesnew' )->parse() );
1297                         } elseif ( $type == 'login' ) {
1298                                 $this->mainLoginForm( $this->msg( 'nocookieslogin' )->parse() );
1299                         } else {
1300                                 # shouldn't happen
1301                                 $this->mainLoginForm( $this->msg( 'error' )->text() );
1302                         }
1303                 } else {
1304                         $this->successfulLogin();
1305                 }
1306         }
1307
1308         /**
1309          * Produce a bar of links which allow the user to select another language
1310          * during login/registration but retain "returnto"
1311          *
1312          * @return string
1313          */
1314         function makeLanguageSelector() {
1315                 $msg = $this->msg( 'loginlanguagelinks' )->inContentLanguage();
1316                 if( !$msg->isBlank() ) {
1317                         $langs = explode( "\n", $msg->text() );
1318                         $links = array();
1319                         foreach( $langs as $lang ) {
1320                                 $lang = trim( $lang, '* ' );
1321                                 $parts = explode( '|', $lang );
1322                                 if ( count( $parts ) >= 2 ) {
1323                                         $links[] = $this->makeLanguageSelectorLink( $parts[0], trim( $parts[1] ) );
1324                                 }
1325                         }
1326                         return count( $links ) > 0 ? $this->msg( 'loginlanguagelabel' )->rawParams(
1327                                 $this->getLanguage()->pipeList( $links ) )->escaped() : '';
1328                 } else {
1329                         return '';
1330                 }
1331         }
1332
1333         /**
1334          * Create a language selector link for a particular language
1335          * Links back to this page preserving type and returnto
1336          *
1337          * @param $text Link text
1338          * @param $lang Language code
1339          * @return string
1340          */
1341         function makeLanguageSelectorLink( $text, $lang ) {
1342                 if( $this->getLanguage()->getCode() == $lang ) {
1343                         // no link for currently used language
1344                         return htmlspecialchars( $text );
1345                 }
1346                 $query = array( 'uselang' => $lang );
1347                 if( $this->mType == 'signup' ) {
1348                         $query['type'] = 'signup';
1349                 }
1350                 if( $this->mReturnTo !== '' ) {
1351                         $query['returnto'] = $this->mReturnTo;
1352                         $query['returntoquery'] = $this->mReturnToQuery;
1353                 }
1354
1355                 $attr = array();
1356                 $targetLanguage = Language::factory( $lang );
1357                 $attr['lang'] = $attr['hreflang'] = $targetLanguage->getHtmlCode();
1358
1359                 return Linker::linkKnown(
1360                         $this->getTitle(),
1361                         htmlspecialchars( $text ),
1362                         $attr,
1363                         $query
1364                 );
1365         }
1366 }