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