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 = null;
  52         private $mTempPasswordUsed;
  53         private $mLoaded = false;
  54         private $mSecureLoginUrl;
  55
  56         /**
  57          * @ var WebRequest
  58          */
  59         private $mOverrideRequest = null;
  60
  61         /**
  62          * Effective request; set at the beginning of load
  63          *
  64          * @var WebRequest $mRequest
  65          */
  66         private $mRequest = null;
  67
  68         /**
  69          * @param WebRequest $request
  70          */
  71         public function __construct( $request = null ) {
  72                 parent::__construct( 'Userlogin' );
  73
  74                 $this->mOverrideRequest = $request;
  75         }
  76
  77         /**
  78          * Loader
  79          */
  80         function load() {
  81                 global $wgAuth, $wgHiddenPrefs, $wgEnableEmail;
  82
  83                 if ( $this->mLoaded ) {
  84                         return;
  85                 }
  86                 $this->mLoaded = true;
  87
  88                 if ( $this->mOverrideRequest === null ) {
  89                         $request = $this->getRequest();
  90                 } else {
  91                         $request = $this->mOverrideRequest;
  92                 }
  93                 $this->mRequest = $request;
  94
  95                 $this->mType = $request->getText( 'type' );
  96                 $this->mUsername = $request->getText( 'wpName' );
  97                 $this->mPassword = $request->getText( 'wpPassword' );
  98                 $this->mRetype = $request->getText( 'wpRetype' );
  99                 $this->mDomain = $request->getText( 'wpDomain' );
 100                 $this->mReason = $request->getText( 'wpReason' );
 101                 $this->mCookieCheck = $request->getVal( 'wpCookieCheck' );
 102                 $this->mPosted = $request->wasPosted();
 103                 $this->mCreateaccountMail = $request->getCheck( 'wpCreateaccountMail' )
 104                                                                         && $wgEnableEmail;
 105                 $this->mCreateaccount = $request->getCheck( 'wpCreateaccount' ) && !$this->mCreateaccountMail;
 106                 $this->mLoginattempt = $request->getCheck( 'wpLoginattempt' );
 107                 $this->mAction = $request->getVal( 'action' );
 108                 $this->mRemember = $request->getCheck( 'wpRemember' );
 109                 $this->mFromHTTP = $request->getBool( 'fromhttp', false );
 110                 $this->mStickHTTPS = ( !$this->mFromHTTP && $request->getProtocol() === 'https' ) || $request->getBool( 'wpForceHttps', false );
 111                 $this->mLanguage = $request->getText( 'uselang' );
 112                 $this->mSkipCookieCheck = $request->getCheck( 'wpSkipCookieCheck' );
 113                 $this->mToken = ( $this->mType == 'signup' ) ? $request->getVal( 'wpCreateaccountToken' ) : $request->getVal( 'wpLoginToken' );
 114                 $this->mReturnTo = $request->getVal( 'returnto', '' );
 115                 $this->mReturnToQuery = $request->getVal( 'returntoquery', '' );
 116
 117                 if ( $wgEnableEmail ) {
 118                         $this->mEmail = $request->getText( 'wpEmail' );
 119                 } else {
 120                         $this->mEmail = '';
 121                 }
 122                 if ( !in_array( 'realname', $wgHiddenPrefs ) ) {
 123                         $this->mRealName = $request->getText( 'wpRealName' );
 124                 } else {
 125                         $this->mRealName = '';
 126                 }
 127
 128                 if ( !$wgAuth->validDomain( $this->mDomain ) ) {
 129                         $this->mDomain = $wgAuth->getDomain();
 130                 }
 131                 $wgAuth->setDomain( $this->mDomain );
 132
 133                 # 1. When switching accounts, it sucks to get automatically logged out
 134                 # 2. Do not return to PasswordReset after a successful password change
 135                 #    but goto Wiki start page (Main_Page) instead ( bug 33997 )
 136                 $returnToTitle = Title::newFromText( $this->mReturnTo );
 137                 if ( is_object( $returnToTitle ) && (
 138                         $returnToTitle->isSpecial( 'Userlogout' )
 139                         || $returnToTitle->isSpecial( 'PasswordReset' ) ) ) {
 140                         $this->mReturnTo = '';
 141                         $this->mReturnToQuery = '';
 142                 }
 143         }
 144
 145         function getDescription() {
 146                 if ( $this->mType === 'signup' ) {
 147                         return $this->msg( 'createaccount' )->text();
 148                 } else {
 149                         return $this->msg( 'login' )->text();
 150                 }
 151         }
 152
 153         /*
 154          * @param $subPage string|null
 155          */
 156         public function execute( $subPage ) {
 157                 if ( session_id() == '' ) {
 158                         wfSetupSession();
 159                 }
 160
 161                 $this->load();
 162
 163                 // Check for [[Special:Userlogin/signup]]. This affects form display and
 164                 // page title.
 165                 if ( $subPage == 'signup' ) {
 166                         $this->mType = 'signup';
 167                 }
 168                 $this->setHeaders();
 169
 170                 // If logging in and not on HTTPS, either redirect to it or offer a link.
 171                 global $wgSecureLogin;
 172                 if ( $this->mRequest->getProtocol() !== 'https' ) {
 173                         $title = $this->getFullTitle();
 174                         $query = array(
 175                                 'returnto' => $this->mReturnTo !== '' ? $this->mReturnTo : null,
 176                                 'returntoquery' => $this->mReturnToQuery !== '' ?
 177                                         $this->mReturnToQuery : null,
 178                                 'title' => null,
 179                         ) + $this->mRequest->getQueryValues();
 180                         $url = $title->getFullURL( $query, false, PROTO_HTTPS );
 181                         if ( $wgSecureLogin && wfCanIPUseHTTPS( $this->getRequest()->getIP() ) ) {
 182                                 $url = wfAppendQuery( $url, 'fromhttp=1' );
 183                                 $this->getOutput()->redirect( $url );
 184                                 // Since we only do this redir to change proto, always vary
 185                                 $this->getOutput()->addVaryHeader( 'X-Forwarded-Proto' );
 186                                 return;
 187                         } else {
 188                                 // A wiki without HTTPS login support should set $wgServer to
 189                                 // http://somehost, in which case the secure URL generated
 190                                 // above won't actually start with https://
 191                                 if ( substr( $url, 0, 8 ) === 'https://' ) {
 192                                         $this->mSecureLoginUrl = $url;
 193                                 }
 194                         }
 195                 }
 196
 197                 if ( !is_null( $this->mCookieCheck ) ) {
 198                         $this->onCookieRedirectCheck( $this->mCookieCheck );
 199                         return;
 200                 } elseif ( $this->mPosted ) {
 201                         if ( $this->mCreateaccount ) {
 202                                 $this->addNewAccount();
 203                                 return;
 204                         } elseif ( $this->mCreateaccountMail ) {
 205                                 $this->addNewAccountMailPassword();
 206                                 return;
 207                         } elseif ( ( 'submitlogin' == $this->mAction ) || $this->mLoginattempt ) {
 208                                 $this->processLogin();
 209                                 return;
 210                         }
 211                 }
 212                 $this->mainLoginForm( '' );
 213         }
 214
 215         /**
 216          * @private
 217          */
 218         function addNewAccountMailPassword() {
 219                 if ( $this->mEmail == '' ) {
 220                         $this->mainLoginForm( $this->msg( 'noemailcreate' )->escaped() );
 221                         return;
 222                 }
 223
 224                 $status = $this->addNewAccountInternal();
 225                 if ( !$status->isGood() ) {
 226                         $error = $status->getMessage();
 227                         $this->mainLoginForm( $error->toString() );
 228                         return;
 229                 }
 230
 231                 $u = $status->getValue();
 232
 233                 // Wipe the initial password and mail a temporary one
 234                 $u->setPassword( null );
 235                 $u->saveSettings();
 236                 $result = $this->mailPasswordInternal( $u, false, 'createaccount-title', 'createaccount-text' );
 237
 238                 wfRunHooks( 'AddNewAccount', array( $u, true ) );
 239                 $u->addNewUserLogEntry( 'byemail', $this->mReason );
 240
 241                 $out = $this->getOutput();
 242                 $out->setPageTitle( $this->msg( 'accmailtitle' ) );
 243
 244                 if ( !$result->isGood() ) {
 245                         $this->mainLoginForm( $this->msg( 'mailerror', $result->getWikiText() )->text() );
 246                 } else {
 247                         $out->addWikiMsg( 'accmailtext', $u->getName(), $u->getEmail() );
 248                         $this->executeReturnTo( 'success' );
 249                 }
 250         }
 251
 252         /**
 253          * @private
 254          * @return bool
 255          */
 256         function addNewAccount() {
 257                 global $wgContLang, $wgUser, $wgEmailAuthentication, $wgLoginLanguageSelector;
 258
 259                 # Create the account and abort if there's a problem doing so
 260                 $status = $this->addNewAccountInternal();
 261                 if ( !$status->isGood() ) {
 262                         $error = $status->getMessage();
 263                         $this->mainLoginForm( $error->toString() );
 264                         return false;
 265                 }
 266
 267                 $u = $status->getValue();
 268
 269                 # Only save preferences if the user is not creating an account for someone else.
 270                 if ( $this->getUser()->isAnon() ) {
 271                         # If we showed up language selection links, and one was in use, be
 272                         # smart (and sensible) and save that language as the user's preference
 273                         if ( $wgLoginLanguageSelector && $this->mLanguage ) {
 274                                 $u->setOption( 'language', $this->mLanguage );
 275                         } else {
 276
 277                                 # Otherwise the user's language preference defaults to $wgContLang,
 278                                 # but it may be better to set it to their preferred $wgContLang variant,
 279                                 # based on browser preferences or URL parameters.
 280                                 $u->setOption( 'language', $wgContLang->getPreferredVariant() );
 281                         }
 282                         if ( $wgContLang->hasVariants() ) {
 283                                 $u->setOption( 'variant', $wgContLang->getPreferredVariant() );
 284                         }
 285                 }
 286
 287                 $out = $this->getOutput();
 288
 289                 # Send out an email authentication message if needed
 290                 if ( $wgEmailAuthentication && Sanitizer::validateEmail( $u->getEmail() ) ) {
 291                         $status = $u->sendConfirmationMail();
 292                         if ( $status->isGood() ) {
 293                                 $out->addWikiMsg( 'confirmemail_oncreate' );
 294                         } else {
 295                                 $out->addWikiText( $status->getWikiText( 'confirmemail_sendfailed' ) );
 296                         }
 297                 }
 298
 299                 # Save settings (including confirmation token)
 300                 $u->saveSettings();
 301
 302                 # If not logged in, assume the new account as the current one and set
 303                 # session cookies then show a "welcome" message or a "need cookies"
 304                 # message as needed
 305                 if ( $this->getUser()->isAnon() ) {
 306                         $u->setCookies();
 307                         $wgUser = $u;
 308                         // This should set it for OutputPage and the Skin
 309                         // which is needed or the personal links will be
 310                         // wrong.
 311                         $this->getContext()->setUser( $u );
 312                         wfRunHooks( 'AddNewAccount', array( $u, false ) );
 313                         $u->addNewUserLogEntry( 'create' );
 314                         if ( $this->hasSessionCookie() ) {
 315                                 $this->successfulCreation();
 316                         } else {
 317                                 $this->cookieRedirectCheck( 'new' );
 318                         }
 319                 } else {
 320                         # Confirm that the account was created
 321                         $out->setPageTitle( $this->msg( 'accountcreated' ) );
 322                         $out->addWikiMsg( 'accountcreatedtext', $u->getName() );
 323                         $out->addReturnTo( $this->getPageTitle() );
 324                         wfRunHooks( 'AddNewAccount', array( $u, false ) );
 325                         $u->addNewUserLogEntry( 'create2', $this->mReason );
 326                 }
 327                 return true;
 328         }
 329
 330         /**
 331          * Make a new user account using the loaded data.
 332          * @private
 333          * @throws PermissionsError|ReadOnlyError
 334          * @return Status
 335          */
 336         public function addNewAccountInternal() {
 337                 global $wgAuth, $wgMemc, $wgAccountCreationThrottle,
 338                         $wgMinimalPasswordLength, $wgEmailConfirmToEdit;
 339
 340                 // If the user passes an invalid domain, something is fishy
 341                 if ( !$wgAuth->validDomain( $this->mDomain ) ) {
 342                         return Status::newFatal( 'wrongpassword' );
 343                 }
 344
 345                 // If we are not allowing users to login locally, we should be checking
 346                 // to see if the user is actually able to authenticate to the authenti-
 347                 // cation server before they create an account (otherwise, they can
 348                 // create a local account and login as any domain user). We only need
 349                 // to check this for domains that aren't local.
 350                 if ( 'local' != $this->mDomain && $this->mDomain != '' ) {
 351                         if (
 352                                 !$wgAuth->canCreateAccounts() &&
 353                                 (
 354                                         !$wgAuth->userExists( $this->mUsername ) ||
 355                                         !$wgAuth->authenticate( $this->mUsername, $this->mPassword )
 356                                 )
 357                         ) {
 358                                 return Status::newFatal( 'wrongpassword' );
 359                         }
 360                 }
 361
 362                 if ( wfReadOnly() ) {
 363                         throw new ReadOnlyError;
 364                 }
 365
 366                 # Request forgery checks.
 367                 if ( !self::getCreateaccountToken() ) {
 368                         self::setCreateaccountToken();
 369                         return Status::newFatal( 'nocookiesfornew' );
 370                 }
 371
 372                 # The user didn't pass a createaccount token
 373                 if ( !$this->mToken ) {
 374                         return Status::newFatal( 'sessionfailure' );
 375                 }
 376
 377                 # Validate the createaccount token
 378                 if ( $this->mToken !== self::getCreateaccountToken() ) {
 379                         return Status::newFatal( 'sessionfailure' );
 380                 }
 381
 382                 # Check permissions
 383                 $currentUser = $this->getUser();
 384                 $creationBlock = $currentUser->isBlockedFromCreateAccount();
 385                 if ( !$currentUser->isAllowed( 'createaccount' ) ) {
 386                         throw new PermissionsError( 'createaccount' );
 387                 } elseif ( $creationBlock instanceof Block ) {
 388                         // Throws an ErrorPageError.
 389                         $this->userBlockedMessage( $creationBlock );
 390                         // This should never be reached.
 391                         return false;
 392                 }
 393
 394                 # Include checks that will include GlobalBlocking (Bug 38333)
 395                 $permErrors = $this->getPageTitle()->getUserPermissionsErrors( 'createaccount', $currentUser, true );
 396                 if ( count( $permErrors ) ) {
 397                                 throw new PermissionsError( 'createaccount', $permErrors );
 398                 }
 399
 400                 $ip = $this->getRequest()->getIP();
 401                 if ( $currentUser->isDnsBlacklisted( $ip, true /* check $wgProxyWhitelist */ ) ) {
 402                         return Status::newFatal( 'sorbs_create_account_reason' );
 403                 }
 404
 405                 // Normalize the name so that silly things don't cause "invalid username" errors.
 406                 // User::newFromName does some rather strict checking, rejecting e.g. leading/trailing/multiple spaces.
 407                 $title = Title::makeTitleSafe( NS_USER, $this->mUsername );
 408                 if ( !is_object( $title ) ) {
 409                         return Status::newFatal( 'noname' );
 410                 }
 411
 412                 # Now create a dummy user ($u) and check if it is valid
 413                 $u = User::newFromName( $title->getText(), 'creatable' );
 414                 if ( !is_object( $u ) ) {
 415                         return Status::newFatal( 'noname' );
 416                 } elseif ( 0 != $u->idForName() ) {
 417                         return Status::newFatal( 'userexists' );
 418                 }
 419
 420                 if ( $this->mCreateaccountMail ) {
 421                         # do not force a password for account creation by email
 422                         # set invalid password, it will be replaced later by a random generated password
 423                         $this->mPassword = null;
 424                 } else {
 425                         if ( $this->mPassword !== $this->mRetype ) {
 426                                 return Status::newFatal( 'badretype' );
 427                         }
 428
 429                         # check for minimal password length
 430                         $valid = $u->getPasswordValidity( $this->mPassword );
 431                         if ( $valid !== true ) {
 432                                 if ( !is_array( $valid ) ) {
 433                                         $valid = array( $valid, $wgMinimalPasswordLength );
 434                                 }
 435                                 return call_user_func_array( 'Status::newFatal', $valid );
 436                         }
 437                 }
 438
 439                 # if you need a confirmed email address to edit, then obviously you
 440                 # need an email address.
 441                 if ( $wgEmailConfirmToEdit && strval( $this->mEmail ) === '' ) {
 442                         return Status::newFatal( 'noemailtitle' );
 443                 }
 444
 445                 if ( strval( $this->mEmail ) !== '' && !Sanitizer::validateEmail( $this->mEmail ) ) {
 446                         return Status::newFatal( 'invalidemailaddress' );
 447                 }
 448
 449                 # Set some additional data so the AbortNewAccount hook can be used for
 450                 # more than just username validation
 451                 $u->setEmail( $this->mEmail );
 452                 $u->setRealName( $this->mRealName );
 453
 454                 $abortError = '';
 455                 $abortStatus = null;
 456                 if ( !wfRunHooks( 'AbortNewAccount', array( $u, &$abortError, &$abortStatus ) ) ) {
 457                         // Hook point to add extra creation throttles and blocks
 458                         wfDebug( "LoginForm::addNewAccountInternal: a hook blocked creation\n" );
 459                         if ( $abortStatus === null ) {
 460                                 // Report back the old string as a raw message status.
 461                                 // This will report the error back as 'createaccount-hook-aborted'
 462                                 // with the given string as the message.
 463                                 // To return a different error code, return a Status object.
 464                                 $abortError = new Message( 'createaccount-hook-aborted', array( $abortError ) );
 465                                 $abortError->text();
 466                                 return Status::newFatal( $abortError );
 467                         } else {
 468                                 // For MediaWiki 1.23+ and updated hooks, return the Status object
 469                                 // returned from the hook.
 470                                 return $abortStatus;
 471                         }
 472                 }
 473
 474                 // Hook point to check for exempt from account creation throttle
 475                 if ( !wfRunHooks( 'ExemptFromAccountCreationThrottle', array( $ip ) ) ) {
 476                         wfDebug( "LoginForm::exemptFromAccountCreationThrottle: a hook allowed account creation w/o throttle\n" );
 477                 } else {
 478                         if ( ( $wgAccountCreationThrottle && $currentUser->isPingLimitable() ) ) {
 479                                 $key = wfMemcKey( 'acctcreate', 'ip', $ip );
 480                                 $value = $wgMemc->get( $key );
 481                                 if ( !$value ) {
 482                                         $wgMemc->set( $key, 0, 86400 );
 483                                 }
 484                                 if ( $value >= $wgAccountCreationThrottle ) {
 485                                         return Status::newFatal( 'acct_creation_throttle_hit', $wgAccountCreationThrottle );
 486                                 }
 487                                 $wgMemc->incr( $key );
 488                         }
 489                 }
 490
 491                 if ( !$wgAuth->addUser( $u, $this->mPassword, $this->mEmail, $this->mRealName ) ) {
 492                         return Status::newFatal( 'externaldberror' );
 493                 }
 494
 495                 self::clearCreateaccountToken();
 496                 return $this->initUser( $u, false );
 497         }
 498
 499         /**
 500          * Actually add a user to the database.
 501          * Give it a User object that has been initialised with a name.
 502          *
 503          * @param $u User object.
 504          * @param $autocreate boolean -- true if this is an autocreation via auth plugin
 505          * @return Status object, with the User object in the value member on success
 506          * @private
 507          */
 508         function initUser( $u, $autocreate ) {
 509                 global $wgAuth;
 510
 511                 $status = $u->addToDatabase();
 512                 if ( !$status->isOK() ) {
 513                         return $status;
 514                 }
 515
 516                 if ( $wgAuth->allowPasswordChange() ) {
 517                         $u->setPassword( $this->mPassword );
 518                 }
 519
 520                 $u->setEmail( $this->mEmail );
 521                 $u->setRealName( $this->mRealName );
 522                 $u->setToken();
 523
 524                 $wgAuth->initUser( $u, $autocreate );
 525
 526                 $u->setOption( 'rememberpassword', $this->mRemember ? 1 : 0 );
 527                 $u->saveSettings();
 528
 529                 // Update user count
 530                 DeferredUpdates::addUpdate( new SiteStatsUpdate( 0, 0, 0, 0, 1 ) );
 531
 532                 // Watch user's userpage and talk page
 533                 $u->addWatch( $u->getUserPage(), WatchedItem::IGNORE_USER_RIGHTS );
 534
 535                 return Status::newGood( $u );
 536         }
 537
 538         /**
 539          * Internally authenticate the login request.
 540          *
 541          * This may create a local account as a side effect if the
 542          * authentication plugin allows transparent local account
 543          * creation.
 544          * @return int
 545          */
 546         public function authenticateUserData() {
 547                 global $wgUser, $wgAuth;
 548
 549                 $this->load();
 550
 551                 if ( $this->mUsername == '' ) {
 552                         return self::NO_NAME;
 553                 }
 554
 555                 // We require a login token to prevent login CSRF
 556                 // Handle part of this before incrementing the throttle so
 557                 // token-less login attempts don't count towards the throttle
 558                 // but wrong-token attempts do.
 559
 560                 // If the user doesn't have a login token yet, set one.
 561                 if ( !self::getLoginToken() ) {
 562                         self::setLoginToken();
 563                         return self::NEED_TOKEN;
 564                 }
 565                 // If the user didn't pass a login token, tell them we need one
 566                 if ( !$this->mToken ) {
 567                         return self::NEED_TOKEN;
 568                 }
 569
 570                 $throttleCount = self::incLoginThrottle( $this->mUsername );
 571                 if ( $throttleCount === true ) {
 572                         return self::THROTTLED;
 573                 }
 574
 575                 // Validate the login token
 576                 if ( $this->mToken !== self::getLoginToken() ) {
 577                         return self::WRONG_TOKEN;
 578                 }
 579
 580                 // Load the current user now, and check to see if we're logging in as
 581                 // the same name. This is necessary because loading the current user
 582                 // (say by calling getName()) calls the UserLoadFromSession hook, which
 583                 // potentially creates the user in the database. Until we load $wgUser,
 584                 // checking for user existence using User::newFromName($name)->getId() below
 585                 // will effectively be using stale data.
 586                 if ( $this->getUser()->getName() === $this->mUsername ) {
 587                         wfDebug( __METHOD__ . ": already logged in as {$this->mUsername}\n" );
 588                         return self::SUCCESS;
 589                 }
 590
 591                 $u = User::newFromName( $this->mUsername );
 592                 if ( !( $u instanceof User ) || !User::isUsableName( $u->getName() ) ) {
 593                         return self::ILLEGAL;
 594                 }
 595
 596                 $isAutoCreated = false;
 597                 if ( $u->getID() == 0 ) {
 598                         $status = $this->attemptAutoCreate( $u );
 599                         if ( $status !== self::SUCCESS ) {
 600                                 return $status;
 601                         } else {
 602                                 $isAutoCreated = true;
 603                         }
 604                 } else {
 605                         $u->load();
 606                 }
 607
 608                 // Give general extensions, such as a captcha, a chance to abort logins
 609                 $abort = self::ABORTED;
 610                 $msg = null;
 611                 if ( !wfRunHooks( 'AbortLogin', array( $u, $this->mPassword, &$abort, &$msg ) ) ) {
 612                         $this->mAbortLoginErrorMsg = $msg;
 613                         return $abort;
 614                 }
 615
 616                 global $wgBlockDisablesLogin;
 617                 if ( !$u->checkPassword( $this->mPassword ) ) {
 618                         if ( $u->checkTemporaryPassword( $this->mPassword ) ) {
 619                                 // The e-mailed temporary password should not be used for actu-
 620                                 // al logins; that's a very sloppy habit, and insecure if an
 621                                 // attacker has a few seconds to click "search" on someone's o-
 622                                 // pen mail reader.
 623                                 //
 624                                 // Allow it to be used only to reset the password a single time
 625                                 // to a new value, which won't be in the user's e-mail ar-
 626                                 // chives.
 627                                 //
 628                                 // For backwards compatibility, we'll still recognize it at the
 629                                 // login form to minimize surprises for people who have been
 630                                 // logging in with a temporary password for some time.
 631                                 //
 632                                 // As a side-effect, we can authenticate the user's e-mail ad-
 633                                 // dress if it's not already done, since the temporary password
 634                                 // was sent via e-mail.
 635                                 if ( !$u->isEmailConfirmed() ) {
 636                                         $u->confirmEmail();
 637                                         $u->saveSettings();
 638                                 }
 639
 640                                 // At this point we just return an appropriate code/ indicating
 641                                 // that the UI should show a password reset form; bot inter-
 642                                 // faces etc will probably just fail cleanly here.
 643                                 $this->mAbortLoginErrorMsg = 'resetpass-temp-emailed';
 644                                 $this->mTempPasswordUsed = true;
 645                                 $retval = self::RESET_PASS;
 646                         } else {
 647                                 $retval = ( $this->mPassword == '' ) ? self::EMPTY_PASS : self::WRONG_PASS;
 648                         }
 649                 } elseif ( $wgBlockDisablesLogin && $u->isBlocked() ) {
 650                         // If we've enabled it, make it so that a blocked user cannot login
 651                         $retval = self::USER_BLOCKED;
 652                 } elseif ( $u->getPasswordExpired() == 'hard' ) {
 653                         // Force reset now, without logging in
 654                         $retval = self::RESET_PASS;
 655                         $this->mAbortLoginErrorMsg = 'resetpass-expired';
 656                 } else {
 657                         $wgAuth->updateUser( $u );
 658                         $wgUser = $u;
 659                         // This should set it for OutputPage and the Skin
 660                         // which is needed or the personal links will be
 661                         // wrong.
 662                         $this->getContext()->setUser( $u );
 663
 664                         // Please reset throttle for successful logins, thanks!
 665                         if ( $throttleCount ) {
 666                                 self::clearLoginThrottle( $this->mUsername );
 667                         }
 668
 669                         if ( $isAutoCreated ) {
 670                                 // Must be run after $wgUser is set, for correct new user log
 671                                 wfRunHooks( 'AuthPluginAutoCreate', array( $u ) );
 672                         }
 673
 674                         $retval = self::SUCCESS;
 675                 }
 676                 wfRunHooks( 'LoginAuthenticateAudit', array( $u, $this->mPassword, $retval ) );
 677                 return $retval;
 678         }
 679
 680         /**
 681          * Increment the login attempt throttle hit count for the (username,current IP)
 682          * tuple unless the throttle was already reached.
 683          * @param string $username The user name
 684          * @return Bool|Integer The integer hit count or True if it is already at the limit
 685          */
 686         public static function incLoginThrottle( $username ) {
 687                 global $wgPasswordAttemptThrottle, $wgMemc, $wgRequest;
 688                 $username = trim( $username ); // sanity
 689
 690                 $throttleCount = 0;
 691                 if ( is_array( $wgPasswordAttemptThrottle ) ) {
 692                         $throttleKey = wfMemcKey( 'password-throttle', $wgRequest->getIP(), md5( $username ) );
 693                         $count = $wgPasswordAttemptThrottle['count'];
 694                         $period = $wgPasswordAttemptThrottle['seconds'];
 695
 696                         $throttleCount = $wgMemc->get( $throttleKey );
 697                         if ( !$throttleCount ) {
 698                                 $wgMemc->add( $throttleKey, 1, $period ); // start counter
 699                         } elseif ( $throttleCount < $count ) {
 700                                 $wgMemc->incr( $throttleKey );
 701                         } elseif ( $throttleCount >= $count ) {
 702                                 return true;
 703                         }
 704                 }
 705
 706                 return $throttleCount;
 707         }
 708
 709         /**
 710          * Clear the login attempt throttle hit count for the (username,current IP) tuple.
 711          * @param string $username The user name
 712          * @return void
 713          */
 714         public static function clearLoginThrottle( $username ) {
 715                 global $wgMemc, $wgRequest;
 716                 $username = trim( $username ); // sanity
 717
 718                 $throttleKey = wfMemcKey( 'password-throttle', $wgRequest->getIP(), md5( $username ) );
 719                 $wgMemc->delete( $throttleKey );
 720         }
 721
 722         /**
 723          * Attempt to automatically create a user on login. Only succeeds if there
 724          * is an external authentication method which allows it.
 725          *
 726          * @param $user User
 727          *
 728          * @return integer Status code
 729          */
 730         function attemptAutoCreate( $user ) {
 731                 global $wgAuth;
 732
 733                 if ( $this->getUser()->isBlockedFromCreateAccount() ) {
 734                         wfDebug( __METHOD__ . ": user is blocked from account creation\n" );
 735                         return self::CREATE_BLOCKED;
 736                 }
 737                 if ( !$wgAuth->autoCreate() ) {
 738                         return self::NOT_EXISTS;
 739                 }
 740                 if ( !$wgAuth->userExists( $user->getName() ) ) {
 741                         wfDebug( __METHOD__ . ": user does not exist\n" );
 742                         return self::NOT_EXISTS;
 743                 }
 744                 if ( !$wgAuth->authenticate( $user->getName(), $this->mPassword ) ) {
 745                         wfDebug( __METHOD__ . ": \$wgAuth->authenticate() returned false, aborting\n" );
 746                         return self::WRONG_PLUGIN_PASS;
 747                 }
 748
 749                 $abortError = '';
 750                 if ( !wfRunHooks( 'AbortAutoAccount', array( $user, &$abortError ) ) ) {
 751                         // Hook point to add extra creation throttles and blocks
 752                         wfDebug( "LoginForm::attemptAutoCreate: a hook blocked creation: $abortError\n" );
 753                         $this->mAbortLoginErrorMsg = $abortError;
 754                         return self::ABORTED;
 755                 }
 756
 757                 wfDebug( __METHOD__ . ": creating account\n" );
 758                 $status = $this->initUser( $user, true );
 759
 760                 if ( !$status->isOK() ) {
 761                         $errors = $status->getErrorsByType( 'error' );
 762                         $this->mAbortLoginErrorMsg = $errors[0]['message'];
 763                         return self::ABORTED;
 764                 }
 765
 766                 return self::SUCCESS;
 767         }
 768
 769         function processLogin() {
 770                 global $wgMemc, $wgLang, $wgSecureLogin, $wgPasswordAttemptThrottle;
 771
 772                 switch ( $this->authenticateUserData() ) {
 773                         case self::SUCCESS:
 774                                 # We've verified now, update the real record
 775                                 $user = $this->getUser();
 776                                 if ( (bool)$this->mRemember != $user->getBoolOption( 'rememberpassword' ) ) {
 777                                         $user->setOption( 'rememberpassword', $this->mRemember ? 1 : 0 );
 778                                         $user->saveSettings();
 779                                 } else {
 780                                         $user->invalidateCache();
 781                                 }
 782
 783                                 if ( $user->requiresHTTPS() ) {
 784                                         $this->mStickHTTPS = true;
 785                                 }
 786
 787                                 if ( $wgSecureLogin && !$this->mStickHTTPS ) {
 788                                         $user->setCookies( null, false );
 789                                 } else {
 790                                         $user->setCookies();
 791                                 }
 792                                 self::clearLoginToken();
 793
 794                                 // Reset the throttle
 795                                 $request = $this->getRequest();
 796                                 $key = wfMemcKey( 'password-throttle', $request->getIP(), md5( $this->mUsername ) );
 797                                 $wgMemc->delete( $key );
 798
 799                                 if ( $this->hasSessionCookie() || $this->mSkipCookieCheck ) {
 800                                         /* Replace the language object to provide user interface in
 801                                          * correct language immediately on this first page load.
 802                                          */
 803                                         $code = $request->getVal( 'uselang', $user->getOption( 'language' ) );
 804                                         $userLang = Language::factory( $code );
 805                                         $wgLang = $userLang;
 806                                         $this->getContext()->setLanguage( $userLang );
 807                                         // Reset SessionID on Successful login (bug 40995)
 808                                         $this->renewSessionId();
 809                                         if ( $this->getUser()->getPasswordExpired() == 'soft' ) {
 810                                                 $this->resetLoginForm( $this->msg( 'resetpass-expired-soft' ) );
 811                                         } else {
 812                                                 $this->successfulLogin();
 813                                         }
 814                                 } else {
 815                                         $this->cookieRedirectCheck( 'login' );
 816                                 }
 817                                 break;
 818
 819                         case self::NEED_TOKEN:
 820                                 $error = $this->mAbortLoginErrorMsg ?: 'nocookiesforlogin';
 821                                 $this->mainLoginForm( $this->msg( $error )->parse() );
 822                                 break;
 823                         case self::WRONG_TOKEN:
 824                                 $error = $this->mAbortLoginErrorMsg ?: 'sessionfailure';
 825                                 $this->mainLoginForm( $this->msg( $error )->text() );
 826                                 break;
 827                         case self::NO_NAME:
 828                         case self::ILLEGAL:
 829                                 $error = $this->mAbortLoginErrorMsg ?: 'noname';
 830                                 $this->mainLoginForm( $this->msg( $error )->text() );
 831                                 break;
 832                         case self::WRONG_PLUGIN_PASS:
 833                                 $error = $this->mAbortLoginErrorMsg ?: 'wrongpassword';
 834                                 $this->mainLoginForm( $this->msg( $error )->text() );
 835                                 break;
 836                         case self::NOT_EXISTS:
 837                                 if ( $this->getUser()->isAllowed( 'createaccount' ) ) {
 838                                         $error = $this->mAbortLoginErrorMsg ?: 'nosuchuser';
 839                                         $this->mainLoginForm( $this->msg( $error,
 840                                                 wfEscapeWikiText( $this->mUsername ) )->parse() );
 841                                 } else {
 842                                         $error = $this->mAbortLoginErrorMsg ?: 'nosuchusershort';
 843                                         $this->mainLoginForm( $this->msg( $error,
 844                                                 wfEscapeWikiText( $this->mUsername ) )->text() );
 845                                 }
 846                                 break;
 847                         case self::WRONG_PASS:
 848                                 $error = $this->mAbortLoginErrorMsg ?: 'wrongpassword';
 849                                 $this->mainLoginForm( $this->msg( $error )->text() );
 850                                 break;
 851                         case self::EMPTY_PASS:
 852                                 $error = $this->mAbortLoginErrorMsg ?: 'wrongpasswordempty';
 853                                 $this->mainLoginForm( $this->msg( $error )->text() );
 854                                 break;
 855                         case self::RESET_PASS:
 856                                 $error = $this->mAbortLoginErrorMsg ?: 'resetpass_announce';
 857                                 $this->resetLoginForm( $this->msg( $error ) );
 858                                 break;
 859                         case self::CREATE_BLOCKED:
 860                                 $this->userBlockedMessage( $this->getUser()->isBlockedFromCreateAccount() );
 861                                 break;
 862                         case self::THROTTLED:
 863                                 $error = $this->mAbortLoginErrorMsg ?: 'login-throttled';
 864                                 $this->mainLoginForm( $this->msg( $error )
 865                                 ->params ( $this->getLanguage()->formatDuration( $wgPasswordAttemptThrottle['seconds'] ) )
 866                                 ->text()
 867                                 );
 868                                 break;
 869                         case self::USER_BLOCKED:
 870                                 $error = $this->mAbortLoginErrorMsg ?: 'login-userblocked';
 871                                 $this->mainLoginForm( $this->msg( $error, $this->mUsername )->escaped() );
 872                                 break;
 873                         case self::ABORTED:
 874                                 $error = $this->mAbortLoginErrorMsg ?: 'login-abort-generic';
 875                                 $this->mainLoginForm( $this->msg( $error )->text() );
 876                                 break;
 877                         default:
 878                                 throw new MWException( 'Unhandled case value' );
 879                 }
 880         }
 881
 882         /**
 883          * Show the Special:ChangePassword form, with custom message
 884          * @param Message $msg
 885          */
 886         protected function resetLoginForm( Message $msg ) {
 887                 // Allow hooks to explain this password reset in more detail
 888                 wfRunHooks( 'LoginPasswordResetMessage', array( &$msg, $this->mUsername ) );
 889                 $reset = new SpecialChangePassword();
 890                 $derivative = new DerivativeContext( $this->getContext() );
 891                 $derivative->setTitle( $reset->getPageTitle() );
 892                 $reset->setContext( $derivative );
 893                 if ( !$this->mTempPasswordUsed ) {
 894                         $reset->setOldPasswordMessage( 'oldpassword' );
 895                 }
 896                 $reset->setChangeMessage( $msg );
 897                 $reset->execute( null );
 898         }
 899
 900         /**
 901          * @param $u User object
 902          * @param $throttle Boolean
 903          * @param string $emailTitle message name of email title
 904          * @param string $emailText message name of email text
 905          * @return Status object
 906          */
 907         function mailPasswordInternal( $u, $throttle = true, $emailTitle = 'passwordremindertitle', $emailText = 'passwordremindertext' ) {
 908                 global $wgNewPasswordExpiry;
 909
 910                 if ( $u->getEmail() == '' ) {
 911                         return Status::newFatal( 'noemail', $u->getName() );
 912                 }
 913                 $ip = $this->getRequest()->getIP();
 914                 if ( !$ip ) {
 915                         return Status::newFatal( 'badipaddress' );
 916                 }
 917
 918                 $currentUser = $this->getUser();
 919                 wfRunHooks( 'User::mailPasswordInternal', array( &$currentUser, &$ip, &$u ) );
 920
 921                 $np = $u->randomPassword();
 922                 $u->setNewpassword( $np, $throttle );
 923                 $u->saveSettings();
 924                 $userLanguage = $u->getOption( 'language' );
 925
 926                 $mainPage = Title::newMainPage();
 927                 $mainPageUrl = $mainPage->getCanonicalURL();
 928
 929                 $m = $this->msg( $emailText, $ip, $u->getName(), $np, '<' . $mainPageUrl . '>',
 930                         round( $wgNewPasswordExpiry / 86400 ) )->inLanguage( $userLanguage )->text();
 931                 $result = $u->sendMail( $this->msg( $emailTitle )->inLanguage( $userLanguage )->text(), $m );
 932
 933                 return $result;
 934         }
 935
 936         /**
 937          * Run any hooks registered for logins, then HTTP redirect to
 938          * $this->mReturnTo (or Main Page if that's undefined).  Formerly we had a
 939          * nice message here, but that's really not as useful as just being sent to
 940          * wherever you logged in from.  It should be clear that the action was
 941          * successful, given the lack of error messages plus the appearance of your
 942          * name in the upper right.
 943          *
 944          * @private
 945          */
 946         function successfulLogin() {
 947                 # Run any hooks; display injected HTML if any, else redirect
 948                 $currentUser = $this->getUser();
 949                 $injected_html = '';
 950                 wfRunHooks( 'UserLoginComplete', array( &$currentUser, &$injected_html ) );
 951
 952                 if ( $injected_html !== '' ) {
 953                         $this->displaySuccessfulAction( $this->msg( 'loginsuccesstitle' ),
 954                                 'loginsuccess', $injected_html );
 955                 } else {
 956                         $this->executeReturnTo( 'successredirect' );
 957                 }
 958         }
 959
 960         /**
 961          * Run any hooks registered for logins, then display a message welcoming
 962          * the user.
 963          *
 964          * @private
 965          */
 966         function successfulCreation() {
 967                 # Run any hooks; display injected HTML
 968                 $currentUser = $this->getUser();
 969                 $injected_html = '';
 970                 $welcome_creation_msg = 'welcomecreation-msg';
 971
 972                 wfRunHooks( 'UserLoginComplete', array( &$currentUser, &$injected_html ) );
 973
 974                 /**
 975                  * Let any extensions change what message is shown.
 976                  * @see https://www.mediawiki.org/wiki/Manual:Hooks/BeforeWelcomeCreation
 977                  * @since 1.18
 978                  */
 979                 wfRunHooks( 'BeforeWelcomeCreation', array( &$welcome_creation_msg, &$injected_html ) );
 980
 981                 $this->displaySuccessfulAction( $this->msg( 'welcomeuser', $this->getUser()->getName() ),
 982                         $welcome_creation_msg, $injected_html );
 983         }
 984
 985         /**
 986          * Display an "successful action" page.
 987          *
 988          * @param string|Message $title page's title
 989          * @param $msgname string
 990          * @param $injected_html string
 991          */
 992         private function displaySuccessfulAction( $title, $msgname, $injected_html ) {
 993                 $out = $this->getOutput();
 994                 $out->setPageTitle( $title );
 995                 if ( $msgname ) {
 996                         $out->addWikiMsg( $msgname, wfEscapeWikiText( $this->getUser()->getName() ) );
 997                 }
 998
 999                 $out->addHTML( $injected_html );
1000
1001                 $this->executeReturnTo( 'success' );
1002         }
1003
1004         /**
1005          * Output a message that informs the user that they cannot create an account because
1006          * there is a block on them or their IP which prevents account creation.  Note that
1007          * User::isBlockedFromCreateAccount(), which gets this block, ignores the 'hardblock'
1008          * setting on blocks (bug 13611).
1009          * @param $block Block the block causing this error
1010          * @throws ErrorPageError
1011          */
1012         function userBlockedMessage( Block $block ) {
1013                 # Let's be nice about this, it's likely that this feature will be used
1014                 # for blocking large numbers of innocent people, e.g. range blocks on
1015                 # schools. Don't blame it on the user. There's a small chance that it
1016                 # really is the user's fault, i.e. the username is blocked and they
1017                 # haven't bothered to log out before trying to create an account to
1018                 # evade it, but we'll leave that to their guilty conscience to figure
1019                 # out.
1020                 $errorParams = array(
1021                         $block->getTarget(),
1022                         $block->mReason ? $block->mReason : $this->msg( 'blockednoreason' )->text(),
1023                         $block->getByName()
1024                 );
1025
1026                 if ( $block->getType() === Block::TYPE_RANGE ) {
1027                         $errorMessage = 'cantcreateaccount-range-text';
1028                         $errorParams[] = $this->getRequest()->getIP();
1029                 } else {
1030                         $errorMessage = 'cantcreateaccount-text';
1031                 }
1032
1033                 throw new ErrorPageError(
1034                         'cantcreateaccounttitle',
1035                         $errorMessage,
1036                         $errorParams
1037                 );
1038         }
1039
1040         /**
1041          * Add a "return to" link or redirect to it.
1042          * Extensions can use this to reuse the "return to" logic after
1043          * inject steps (such as redirection) into the login process.
1044          *
1045          * @param $type string, one of the following:
1046          *    - error: display a return to link ignoring $wgRedirectOnLogin
1047          *    - success: display a return to link using $wgRedirectOnLogin if needed
1048          *    - successredirect: send an HTTP redirect using $wgRedirectOnLogin if needed
1049          * @param string $returnTo
1050          * @param array|string $returnToQuery
1051          * @param bool $stickHTTPs Keep redirect link on HTTPs
1052          * @since 1.22
1053          */
1054         public function showReturnToPage(
1055                 $type, $returnTo = '', $returnToQuery = '', $stickHTTPs = false
1056         ) {
1057                 $this->mReturnTo = $returnTo;
1058                 $this->mReturnToQuery = $returnToQuery;
1059                 $this->mStickHTTPS = $stickHTTPs;
1060                 $this->executeReturnTo( $type );
1061         }
1062
1063         /**
1064          * Add a "return to" link or redirect to it.
1065          *
1066          * @param $type string, one of the following:
1067          *    - error: display a return to link ignoring $wgRedirectOnLogin
1068          *    - success: display a return to link using $wgRedirectOnLogin if needed
1069          *    - successredirect: send an HTTP redirect using $wgRedirectOnLogin if needed
1070          */
1071         private function executeReturnTo( $type ) {
1072                 global $wgRedirectOnLogin, $wgSecureLogin;
1073
1074                 if ( $type != 'error' && $wgRedirectOnLogin !== null ) {
1075                         $returnTo = $wgRedirectOnLogin;
1076                         $returnToQuery = array();
1077                 } else {
1078                         $returnTo = $this->mReturnTo;
1079                         $returnToQuery = wfCgiToArray( $this->mReturnToQuery );
1080                 }
1081
1082                 $returnToTitle = Title::newFromText( $returnTo );
1083                 if ( !$returnToTitle ) {
1084                         $returnToTitle = Title::newMainPage();
1085                 }
1086
1087                 if ( $wgSecureLogin && !$this->mStickHTTPS ) {
1088                         $options = array( 'http' );
1089                         $proto = PROTO_HTTP;
1090                 } elseif ( $wgSecureLogin ) {
1091                         $options = array( 'https' );
1092                         $proto = PROTO_HTTPS;
1093                 } else {
1094                         $options = array();
1095                         $proto = PROTO_RELATIVE;
1096                 }
1097
1098                 if ( $type == 'successredirect' ) {
1099                         $redirectUrl = $returnToTitle->getFullURL( $returnToQuery, false, $proto );
1100                         $this->getOutput()->redirect( $redirectUrl );
1101                 } else {
1102                         $this->getOutput()->addReturnTo( $returnToTitle, $returnToQuery, null, $options );
1103                 }
1104         }
1105
1106         /**
1107          * @private
1108          */
1109         function mainLoginForm( $msg, $msgtype = 'error' ) {
1110                 global $wgEnableEmail, $wgEnableUserEmail;
1111                 global $wgHiddenPrefs, $wgLoginLanguageSelector;
1112                 global $wgAuth, $wgEmailConfirmToEdit, $wgCookieExpiration;
1113                 global $wgSecureLogin, $wgPasswordResetRoutes;
1114
1115                 $titleObj = $this->getPageTitle();
1116                 $user = $this->getUser();
1117                 $out = $this->getOutput();
1118
1119                 if ( $this->mType == 'signup' ) {
1120                         // Block signup here if in readonly. Keeps user from
1121                         // going through the process (filling out data, etc)
1122                         // and being informed later.
1123                         $permErrors = $titleObj->getUserPermissionsErrors( 'createaccount', $user, true );
1124                         if ( count( $permErrors ) ) {
1125                                 throw new PermissionsError( 'createaccount', $permErrors );
1126                         } elseif ( $user->isBlockedFromCreateAccount() ) {
1127                                 $this->userBlockedMessage( $user->isBlockedFromCreateAccount() );
1128                                 return;
1129                         } elseif ( wfReadOnly() ) {
1130                                 throw new ReadOnlyError;
1131                         }
1132                 }
1133
1134                 // Pre-fill username (if not creating an account, bug 44775).
1135                 if ( $this->mUsername == '' && $this->mType != 'signup' ) {
1136                         if ( $user->isLoggedIn() ) {
1137                                 $this->mUsername = $user->getName();
1138                         } else {
1139                                 $this->mUsername = $this->getRequest()->getCookie( 'UserName' );
1140                         }
1141                 }
1142
1143                 // Generic styles and scripts for both login and signup form
1144                 $out->addModuleStyles( array(
1145                         'mediawiki.ui',
1146                         'mediawiki.ui.button',
1147                         'mediawiki.special.userlogin.common.styles'
1148                 ) );
1149                 $out->addModules( array(
1150                         'mediawiki.special.userlogin.common.js'
1151                 ) );
1152
1153                 if ( $this->mType == 'signup' ) {
1154                         // XXX hack pending RL or JS parse() support for complex content messages
1155                         // https://bugzilla.wikimedia.org/show_bug.cgi?id=25349
1156                         $out->addJsConfigVars( 'wgCreateacctImgcaptchaHelp',
1157                                 $this->msg( 'createacct-imgcaptcha-help' )->parse() );
1158
1159                         // Additional styles and scripts for signup form
1160                         $out->addModules( array(
1161                                 'mediawiki.special.userlogin.signup.js'
1162                         ) );
1163                         $out->addModuleStyles( array(
1164                                 'mediawiki.special.userlogin.signup.styles'
1165                         ) );
1166
1167                         $template = new UsercreateTemplate();
1168
1169                         // Must match number of benefits defined in messages
1170                         $template->set( 'benefitCount', 3 );
1171
1172                         $q = 'action=submitlogin&type=signup';
1173                         $linkq = 'type=login';
1174                 } else {
1175                         // Additional styles for login form
1176                         $out->addModuleStyles( array(
1177                                 'mediawiki.special.userlogin.login.styles'
1178                         ) );
1179
1180                         $template = new UserloginTemplate();
1181
1182                         $q = 'action=submitlogin&type=login';
1183                         $linkq = 'type=signup';
1184                 }
1185
1186                 if ( $this->mReturnTo !== '' ) {
1187                         $returnto = '&returnto=' . wfUrlencode( $this->mReturnTo );
1188                         if ( $this->mReturnToQuery !== '' ) {
1189                                 $returnto .= '&returntoquery=' .
1190                                         wfUrlencode( $this->mReturnToQuery );
1191                         }
1192                         $q .= $returnto;
1193                         $linkq .= $returnto;
1194                 }
1195
1196                 # Don't show a "create account" link if the user can't.
1197                 if ( $this->showCreateOrLoginLink( $user ) ) {
1198                         # Pass any language selection on to the mode switch link
1199                         if ( $wgLoginLanguageSelector && $this->mLanguage ) {
1200                                 $linkq .= '&uselang=' . $this->mLanguage;
1201                         }
1202                         // Supply URL, login template creates the button.
1203                         $template->set( 'createOrLoginHref', $titleObj->getLocalURL( $linkq ) );
1204                 } else {
1205                         $template->set( 'link', '' );
1206                 }
1207
1208                 $resetLink = $this->mType == 'signup'
1209                         ? null
1210                         : is_array( $wgPasswordResetRoutes ) && in_array( true, array_values( $wgPasswordResetRoutes ) );
1211
1212                 $template->set( 'header', '' );
1213                 $template->set( 'skin', $this->getSkin() );
1214                 $template->set( 'name', $this->mUsername );
1215                 $template->set( 'password', $this->mPassword );
1216                 $template->set( 'retype', $this->mRetype );
1217                 $template->set( 'createemailset', $this->mCreateaccountMail );
1218                 $template->set( 'email', $this->mEmail );
1219                 $template->set( 'realname', $this->mRealName );
1220                 $template->set( 'domain', $this->mDomain );
1221                 $template->set( 'reason', $this->mReason );
1222
1223                 $template->set( 'action', $titleObj->getLocalURL( $q ) );
1224                 $template->set( 'message', $msg );
1225                 $template->set( 'messagetype', $msgtype );
1226                 $template->set( 'createemail', $wgEnableEmail && $user->isLoggedIn() );
1227                 $template->set( 'userealname', !in_array( 'realname', $wgHiddenPrefs ) );
1228                 $template->set( 'useemail', $wgEnableEmail );
1229                 $template->set( 'emailrequired', $wgEmailConfirmToEdit );
1230                 $template->set( 'emailothers', $wgEnableUserEmail );
1231                 $template->set( 'canreset', $wgAuth->allowPasswordChange() );
1232                 $template->set( 'resetlink', $resetLink );
1233                 $template->set( 'canremember', ( $wgCookieExpiration > 0 ) );
1234                 $template->set( 'usereason', $user->isLoggedIn() );
1235                 $template->set( 'remember', $user->getOption( 'rememberpassword' ) || $this->mRemember );
1236                 $template->set( 'cansecurelogin', ( $wgSecureLogin === true ) );
1237                 $template->set( 'stickhttps', (int)$this->mStickHTTPS );
1238                 $template->set( 'loggedin', $user->isLoggedIn() );
1239                 $template->set( 'loggedinuser', $user->getName() );
1240
1241                 if ( $this->mType == 'signup' ) {
1242                         if ( !self::getCreateaccountToken() ) {
1243                                 self::setCreateaccountToken();
1244                         }
1245                         $template->set( 'token', self::getCreateaccountToken() );
1246                 } else {
1247                         if ( !self::getLoginToken() ) {
1248                                 self::setLoginToken();
1249                         }
1250                         $template->set( 'token', self::getLoginToken() );
1251                 }
1252
1253                 # Prepare language selection links as needed
1254                 if ( $wgLoginLanguageSelector ) {
1255                         $template->set( 'languages', $this->makeLanguageSelector() );
1256                         if ( $this->mLanguage ) {
1257                                 $template->set( 'uselang', $this->mLanguage );
1258                         }
1259                 }
1260
1261                 $template->set( 'secureLoginUrl', $this->mSecureLoginUrl );
1262                 // Use loginend-https for HTTPS requests if it's not blank, loginend otherwise
1263                 // Ditto for signupend.  New forms use neither.
1264                 $usingHTTPS = $this->mRequest->getProtocol() == 'https';
1265                 $loginendHTTPS = $this->msg( 'loginend-https' );
1266                 $signupendHTTPS = $this->msg( 'signupend-https' );
1267                 if ( $usingHTTPS && !$loginendHTTPS->isBlank() ) {
1268                         $template->set( 'loginend', $loginendHTTPS->parse() );
1269                 } else {
1270                         $template->set( 'loginend', $this->msg( 'loginend' )->parse() );
1271                 }
1272                 if ( $usingHTTPS && !$signupendHTTPS->isBlank() ) {
1273                         $template->set( 'signupend', $signupendHTTPS->parse() );
1274                 } else {
1275                         $template->set( 'signupend', $this->msg( 'signupend' )->parse() );
1276                 }
1277
1278                 // Give authentication and captcha plugins a chance to modify the form
1279                 $wgAuth->modifyUITemplate( $template, $this->mType );
1280                 if ( $this->mType == 'signup' ) {
1281                         wfRunHooks( 'UserCreateForm', array( &$template ) );
1282                 } else {
1283                         wfRunHooks( 'UserLoginForm', array( &$template ) );
1284                 }
1285
1286                 $out->disallowUserJs(); // just in case...
1287                 $out->addTemplate( $template );
1288         }
1289
1290         /**
1291          * Whether the login/create account form should display a link to the
1292          * other form (in addition to whatever the skin provides).
1293          *
1294          * @param $user User
1295          * @return bool
1296          */
1297         private function showCreateOrLoginLink( &$user ) {
1298                 if ( $this->mType == 'signup' ) {
1299                         return true;
1300                 } elseif ( $user->isAllowed( 'createaccount' ) ) {
1301                         return true;
1302                 } else {
1303                         return false;
1304                 }
1305         }
1306
1307         /**
1308          * Check if a session cookie is present.
1309          *
1310          * This will not pick up a cookie set during _this_ request, but is meant
1311          * to ensure that the client is returning the cookie which was set on a
1312          * previous pass through the system.
1313          *
1314          * @private
1315          * @return bool
1316          */
1317         function hasSessionCookie() {
1318                 global $wgDisableCookieCheck;
1319                 return $wgDisableCookieCheck ? true : $this->getRequest()->checkSessionCookie();
1320         }
1321
1322         /**
1323          * Get the login token from the current session
1324          * @return Mixed
1325          */
1326         public static function getLoginToken() {
1327                 global $wgRequest;
1328                 return $wgRequest->getSessionData( 'wsLoginToken' );
1329         }
1330
1331         /**
1332          * Randomly generate a new login token and attach it to the current session
1333          */
1334         public static function setLoginToken() {
1335                 global $wgRequest;
1336                 // Generate a token directly instead of using $user->getEditToken()
1337                 // because the latter reuses $_SESSION['wsEditToken']
1338                 $wgRequest->setSessionData( 'wsLoginToken', MWCryptRand::generateHex( 32 ) );
1339         }
1340
1341         /**
1342          * Remove any login token attached to the current session
1343          */
1344         public static function clearLoginToken() {
1345                 global $wgRequest;
1346                 $wgRequest->setSessionData( 'wsLoginToken', null );
1347         }
1348
1349         /**
1350          * Get the createaccount token from the current session
1351          * @return Mixed
1352          */
1353         public static function getCreateaccountToken() {
1354                 global $wgRequest;
1355                 return $wgRequest->getSessionData( 'wsCreateaccountToken' );
1356         }
1357
1358         /**
1359          * Randomly generate a new createaccount token and attach it to the current session
1360          */
1361         public static function setCreateaccountToken() {
1362                 global $wgRequest;
1363                 $wgRequest->setSessionData( 'wsCreateaccountToken', MWCryptRand::generateHex( 32 ) );
1364         }
1365
1366         /**
1367          * Remove any createaccount token attached to the current session
1368          */
1369         public static function clearCreateaccountToken() {
1370                 global $wgRequest;
1371                 $wgRequest->setSessionData( 'wsCreateaccountToken', null );
1372         }
1373
1374         /**
1375          * Renew the user's session id, using strong entropy
1376          */
1377         private function renewSessionId() {
1378                 global $wgSecureLogin, $wgCookieSecure;
1379                 if ( $wgSecureLogin && !$this->mStickHTTPS ) {
1380                         $wgCookieSecure = false;
1381                 }
1382
1383                 wfResetSessionID();
1384         }
1385
1386         /**
1387          * @private
1388          */
1389         function cookieRedirectCheck( $type ) {
1390                 $titleObj = SpecialPage::getTitleFor( 'Userlogin' );
1391                 $query = array( 'wpCookieCheck' => $type );
1392                 if ( $this->mReturnTo !== '' ) {
1393                         $query['returnto'] = $this->mReturnTo;
1394                         $query['returntoquery'] = $this->mReturnToQuery;
1395                 }
1396                 $check = $titleObj->getFullURL( $query );
1397
1398                 $this->getOutput()->redirect( $check );
1399         }
1400
1401         /**
1402          * @private
1403          */
1404         function onCookieRedirectCheck( $type ) {
1405                 if ( !$this->hasSessionCookie() ) {
1406                         if ( $type == 'new' ) {
1407                                 $this->mainLoginForm( $this->msg( 'nocookiesnew' )->parse() );
1408                         } elseif ( $type == 'login' ) {
1409                                 $this->mainLoginForm( $this->msg( 'nocookieslogin' )->parse() );
1410                         } else {
1411                                 # shouldn't happen
1412                                 $this->mainLoginForm( $this->msg( 'error' )->text() );
1413                         }
1414                 } else {
1415                         $this->successfulLogin();
1416                 }
1417         }
1418
1419         /**
1420          * Produce a bar of links which allow the user to select another language
1421          * during login/registration but retain "returnto"
1422          *
1423          * @return string
1424          */
1425         function makeLanguageSelector() {
1426                 $msg = $this->msg( 'loginlanguagelinks' )->inContentLanguage();
1427                 if ( !$msg->isBlank() ) {
1428                         $langs = explode( "\n", $msg->text() );
1429                         $links = array();
1430                         foreach ( $langs as $lang ) {
1431                                 $lang = trim( $lang, '* ' );
1432                                 $parts = explode( '|', $lang );
1433                                 if ( count( $parts ) >= 2 ) {
1434                                         $links[] = $this->makeLanguageSelectorLink( $parts[0], trim( $parts[1] ) );
1435                                 }
1436                         }
1437                         return count( $links ) > 0 ? $this->msg( 'loginlanguagelabel' )->rawParams(
1438                                 $this->getLanguage()->pipeList( $links ) )->escaped() : '';
1439                 } else {
1440                         return '';
1441                 }
1442         }
1443
1444         /**
1445          * Create a language selector link for a particular language
1446          * Links back to this page preserving type and returnto
1447          *
1448          * @param string $text Link text
1449          * @param string $lang Language code
1450          * @return string
1451          */
1452         function makeLanguageSelectorLink( $text, $lang ) {
1453                 if ( $this->getLanguage()->getCode() == $lang ) {
1454                         // no link for currently used language
1455                         return htmlspecialchars( $text );
1456                 }
1457                 $query = array( 'uselang' => $lang );
1458                 if ( $this->mType == 'signup' ) {
1459                         $query['type'] = 'signup';
1460                 }
1461                 if ( $this->mReturnTo !== '' ) {
1462                         $query['returnto'] = $this->mReturnTo;
1463                         $query['returntoquery'] = $this->mReturnToQuery;
1464                 }
1465
1466                 $attr = array();
1467                 $targetLanguage = Language::factory( $lang );
1468                 $attr['lang'] = $attr['hreflang'] = $targetLanguage->getHtmlCode();
1469
1470                 return Linker::linkKnown(
1471                         $this->getPageTitle(),
1472                         htmlspecialchars( $text ),
1473                         $attr,
1474                         $query
1475                 );
1476         }
1477
1478         protected function getGroupName() {
1479                 return 'login';
1480         }
1481 }