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 use MediaWiki\Logger\LoggerFactory;
  24
  25 /**
  26  * Implements Special:UserLogin
  27  *
  28  * @ingroup SpecialPage
  29  */
  30 class LoginForm extends SpecialPage {
  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         const USER_MIGRATED = 14;
  46
  47         public static $statusCodes = array(
  48                 self::SUCCESS => 'success',
  49                 self::NO_NAME => 'no_name',
  50                 self::ILLEGAL => 'illegal',
  51                 self::WRONG_PLUGIN_PASS => 'wrong_plugin_pass',
  52                 self::NOT_EXISTS => 'not_exists',
  53                 self::WRONG_PASS => 'wrong_pass',
  54                 self::EMPTY_PASS => 'empty_pass',
  55                 self::RESET_PASS => 'reset_pass',
  56                 self::ABORTED => 'aborted',
  57                 self::CREATE_BLOCKED => 'create_blocked',
  58                 self::THROTTLED => 'throttled',
  59                 self::USER_BLOCKED => 'user_blocked',
  60                 self::NEED_TOKEN => 'need_token',
  61                 self::WRONG_TOKEN => 'wrong_token',
  62                 self::USER_MIGRATED => 'user_migrated',
  63         );
  64
  65         /**
  66          * Valid error and warning messages
  67          *
  68          * Special:Userlogin can show an error or warning message on the form when
  69          * coming from another page. This is done via the ?error= or ?warning= GET
  70          * parameters.
  71          *
  72          * This array is the list of valid message keys. All other values will be
  73          * ignored.
  74          *
  75          * @since 1.24
  76          * @var string[]
  77          */
  78         public static $validErrorMessages = array(
  79                 'exception-nologin-text',
  80                 'watchlistanontext',
  81                 'changeemail-no-info',
  82                 'resetpass-no-info',
  83                 'confirmemail_needlogin',
  84                 'prefsnologintext2',
  85         );
  86
  87         public $mAbortLoginErrorMsg = null;
  88
  89         protected $mUsername;
  90         protected $mPassword;
  91         protected $mRetype;
  92         protected $mReturnTo;
  93         protected $mCookieCheck;
  94         protected $mPosted;
  95         protected $mAction;
  96         protected $mCreateaccount;
  97         protected $mCreateaccountMail;
  98         protected $mLoginattempt;
  99         protected $mRemember;
 100         protected $mEmail;
 101         protected $mDomain;
 102         protected $mLanguage;
 103         protected $mSkipCookieCheck;
 104         protected $mReturnToQuery;
 105         protected $mToken;
 106         protected $mStickHTTPS;
 107         protected $mType;
 108         protected $mReason;
 109         protected $mRealName;
 110         protected $mEntryError = '';
 111         protected $mEntryErrorType = 'error';
 112
 113         private $mTempPasswordUsed;
 114         private $mLoaded = false;
 115         private $mSecureLoginUrl;
 116
 117         /** @var WebRequest */
 118         private $mOverrideRequest = null;
 119
 120         /** @var WebRequest Effective request; set at the beginning of load */
 121         private $mRequest = null;
 122
 123         /**
 124          * @param WebRequest $request
 125          */
 126         public function __construct( $request = null ) {
 127                 global $wgUseMediaWikiUIEverywhere;
 128                 parent::__construct( 'Userlogin' );
 129
 130                 $this->mOverrideRequest = $request;
 131                 // Override UseMediaWikiEverywhere to true, to force login and create form to use mw ui
 132                 $wgUseMediaWikiUIEverywhere = true;
 133         }
 134
 135         /**
 136          * Returns an array of all valid error messages.
 137          *
 138          * @return array
 139          */
 140         public static function getValidErrorMessages() {
 141                 static $messages = null;
 142                 if ( !$messages ) {
 143                         $messages = self::$validErrorMessages;
 144                         Hooks::run( 'LoginFormValidErrorMessages', array( &$messages ) );
 145                 }
 146
 147                 return $messages;
 148         }
 149
 150         /**
 151          * Loader
 152          */
 153         function load() {
 154                 global $wgAuth, $wgHiddenPrefs, $wgEnableEmail;
 155
 156                 if ( $this->mLoaded ) {
 157                         return;
 158                 }
 159                 $this->mLoaded = true;
 160
 161                 if ( $this->mOverrideRequest === null ) {
 162                         $request = $this->getRequest();
 163                 } else {
 164                         $request = $this->mOverrideRequest;
 165                 }
 166                 $this->mRequest = $request;
 167
 168                 $this->mType = $request->getText( 'type' );
 169                 $this->mUsername = $request->getText( 'wpName' );
 170                 $this->mPassword = $request->getText( 'wpPassword' );
 171                 $this->mRetype = $request->getText( 'wpRetype' );
 172                 $this->mDomain = $request->getText( 'wpDomain' );
 173                 $this->mReason = $request->getText( 'wpReason' );
 174                 $this->mCookieCheck = $request->getVal( 'wpCookieCheck' );
 175                 $this->mPosted = $request->wasPosted();
 176                 $this->mCreateaccountMail = $request->getCheck( 'wpCreateaccountMail' )
 177                         && $wgEnableEmail;
 178                 $this->mCreateaccount = $request->getCheck( 'wpCreateaccount' ) && !$this->mCreateaccountMail;
 179                 $this->mLoginattempt = $request->getCheck( 'wpLoginattempt' );
 180                 $this->mAction = $request->getVal( 'action' );
 181                 $this->mRemember = $request->getCheck( 'wpRemember' );
 182                 $this->mFromHTTP = $request->getBool( 'fromhttp', false )
 183                         || $request->getBool( 'wpFromhttp', false );
 184                 $this->mStickHTTPS = ( !$this->mFromHTTP && $request->getProtocol() === 'https' )
 185                         || $request->getBool( 'wpForceHttps', false );
 186                 $this->mLanguage = $request->getText( 'uselang' );
 187                 $this->mSkipCookieCheck = $request->getCheck( 'wpSkipCookieCheck' );
 188                 $this->mToken = $this->mType == 'signup'
 189                         ? $request->getVal( 'wpCreateaccountToken' )
 190                         : $request->getVal( 'wpLoginToken' );
 191                 $this->mReturnTo = $request->getVal( 'returnto', '' );
 192                 $this->mReturnToQuery = $request->getVal( 'returntoquery', '' );
 193
 194                 // Show an error or warning passed on from a previous page
 195                 $entryError = $this->msg( $request->getVal( 'error', '' ) );
 196                 $entryWarning = $this->msg( $request->getVal( 'warning', '' ) );
 197                 // bc: provide login link as a parameter for messages where the translation
 198                 // was not updated
 199                 $loginreqlink = Linker::linkKnown(
 200                         $this->getPageTitle(),
 201                         $this->msg( 'loginreqlink' )->escaped(),
 202                         array(),
 203                         array(
 204                                 'returnto' => $this->mReturnTo,
 205                                 'returntoquery' => $this->mReturnToQuery,
 206                                 'uselang' => $this->mLanguage,
 207                                 'fromhttp' => $this->mFromHTTP ? '1' : '0',
 208                         )
 209                 );
 210
 211                 // Only show valid error or warning messages.
 212                 if ( $entryError->exists()
 213                         && in_array( $entryError->getKey(), self::getValidErrorMessages() )
 214                 ) {
 215                         $this->mEntryErrorType = 'error';
 216                         $this->mEntryError = $entryError->rawParams( $loginreqlink )->parse();
 217
 218                 } elseif ( $entryWarning->exists()
 219                         && in_array( $entryWarning->getKey(), self::getValidErrorMessages() )
 220                 ) {
 221                         $this->mEntryErrorType = 'warning';
 222                         $this->mEntryError = $entryWarning->rawParams( $loginreqlink )->parse();
 223                 }
 224
 225                 if ( $wgEnableEmail ) {
 226                         $this->mEmail = $request->getText( 'wpEmail' );
 227                 } else {
 228                         $this->mEmail = '';
 229                 }
 230                 if ( !in_array( 'realname', $wgHiddenPrefs ) ) {
 231                         $this->mRealName = $request->getText( 'wpRealName' );
 232                 } else {
 233                         $this->mRealName = '';
 234                 }
 235
 236                 if ( !$wgAuth->validDomain( $this->mDomain ) ) {
 237                         $this->mDomain = $wgAuth->getDomain();
 238                 }
 239                 $wgAuth->setDomain( $this->mDomain );
 240
 241                 # 1. When switching accounts, it sucks to get automatically logged out
 242                 # 2. Do not return to PasswordReset after a successful password change
 243                 #    but goto Wiki start page (Main_Page) instead ( bug 33997 )
 244                 $returnToTitle = Title::newFromText( $this->mReturnTo );
 245                 if ( is_object( $returnToTitle )
 246                         && ( $returnToTitle->isSpecial( 'Userlogout' )
 247                                 || $returnToTitle->isSpecial( 'PasswordReset' ) )
 248                 ) {
 249                         $this->mReturnTo = '';
 250                         $this->mReturnToQuery = '';
 251                 }
 252         }
 253
 254         function getDescription() {
 255                 if ( $this->mType === 'signup' ) {
 256                         return $this->msg( 'createaccount' )->text();
 257                 } else {
 258                         return $this->msg( 'login' )->text();
 259                 }
 260         }
 261
 262         /**
 263          * @param string|null $subPage
 264          */
 265         public function execute( $subPage ) {
 266                 if ( session_id() == '' ) {
 267                         wfSetupSession();
 268                 }
 269
 270                 $this->load();
 271
 272                 // Check for [[Special:Userlogin/signup]]. This affects form display and
 273                 // page title.
 274                 if ( $subPage == 'signup' ) {
 275                         $this->mType = 'signup';
 276                 }
 277                 $this->setHeaders();
 278
 279                 // In the case where the user is already logged in, and was redirected to the login form from a
 280                 // page that requires login, do not show the login page. The use case scenario for this is when
 281                 // a user opens a large number of tabs, is redirected to the login page on all of them, and then
 282                 // logs in on one, expecting all the others to work properly.
 283                 //
 284                 // However, do show the form if it was visited intentionally (no 'returnto' is present). People
 285                 // who often switch between several accounts have grown accustomed to this behavior.
 286                 if (
 287                         $this->mType !== 'signup' &&
 288                         !$this->mPosted &&
 289                         $this->getUser()->isLoggedIn() &&
 290                         ( $this->mReturnTo !== '' || $this->mReturnToQuery !== '' )
 291                 ) {
 292                         $this->successfulLogin();
 293                 }
 294
 295                 // If logging in and not on HTTPS, either redirect to it or offer a link.
 296                 global $wgSecureLogin;
 297                 if ( $this->mRequest->getProtocol() !== 'https' ) {
 298                         $title = $this->getFullTitle();
 299                         $query = array(
 300                                 'returnto' => $this->mReturnTo !== '' ? $this->mReturnTo : null,
 301                                 'returntoquery' => $this->mReturnToQuery !== '' ?
 302                                         $this->mReturnToQuery : null,
 303                                 'title' => null,
 304                                 ( $this->mEntryErrorType === 'error' ? 'error' : 'warning' ) => $this->mEntryError,
 305                         ) + $this->mRequest->getQueryValues();
 306                         $url = $title->getFullURL( $query, false, PROTO_HTTPS );
 307                         if ( $wgSecureLogin
 308                                 && wfCanIPUseHTTPS( $this->getRequest()->getIP() )
 309                                 && !$this->mFromHTTP ) // Avoid infinite redirect
 310                         {
 311                                 $url = wfAppendQuery( $url, 'fromhttp=1' );
 312                                 $this->getOutput()->redirect( $url );
 313                                 // Since we only do this redir to change proto, always vary
 314                                 $this->getOutput()->addVaryHeader( 'X-Forwarded-Proto' );
 315
 316                                 return;
 317                         } else {
 318                                 // A wiki without HTTPS login support should set $wgServer to
 319                                 // http://somehost, in which case the secure URL generated
 320                                 // above won't actually start with https://
 321                                 if ( substr( $url, 0, 8 ) === 'https://' ) {
 322                                         $this->mSecureLoginUrl = $url;
 323                                 }
 324                         }
 325                 }
 326
 327                 if ( !is_null( $this->mCookieCheck ) ) {
 328                         $this->onCookieRedirectCheck( $this->mCookieCheck );
 329
 330                         return;
 331                 } elseif ( $this->mPosted ) {
 332                         if ( $this->mCreateaccount ) {
 333                                 $this->addNewAccount();
 334
 335                                 return;
 336                         } elseif ( $this->mCreateaccountMail ) {
 337                                 $this->addNewAccountMailPassword();
 338
 339                                 return;
 340                         } elseif ( ( 'submitlogin' == $this->mAction ) || $this->mLoginattempt ) {
 341                                 $this->processLogin();
 342
 343                                 return;
 344                         }
 345                 }
 346                 $this->mainLoginForm( $this->mEntryError, $this->mEntryErrorType );
 347         }
 348
 349         /**
 350          * @private
 351          */
 352         function addNewAccountMailPassword() {
 353                 if ( $this->mEmail == '' ) {
 354                         $this->mainLoginForm( $this->msg( 'noemailcreate' )->escaped() );
 355
 356                         return;
 357                 }
 358
 359                 $status = $this->addNewAccountInternal();
 360                 LoggerFactory::getInstance( 'authmanager' )->info( 'Account creation attempt with mailed password', array(
 361                         'event' => 'accountcreation',
 362                         'status' => $status,
 363                 ) );
 364                 if ( !$status->isGood() ) {
 365                         $error = $status->getMessage();
 366                         $this->mainLoginForm( $error->toString() );
 367
 368                         return;
 369                 }
 370
 371                 $u = $status->getValue();
 372
 373                 // Wipe the initial password and mail a temporary one
 374                 $u->setPassword( null );
 375                 $u->saveSettings();
 376                 $result = $this->mailPasswordInternal( $u, false, 'createaccount-title', 'createaccount-text' );
 377
 378                 Hooks::run( 'AddNewAccount', array( $u, true ) );
 379                 $u->addNewUserLogEntry( 'byemail', $this->mReason );
 380
 381                 $out = $this->getOutput();
 382                 $out->setPageTitle( $this->msg( 'accmailtitle' ) );
 383
 384                 if ( !$result->isGood() ) {
 385                         $this->mainLoginForm( $this->msg( 'mailerror', $result->getWikiText() )->text() );
 386                 } else {
 387                         $out->addWikiMsg( 'accmailtext', $u->getName(), $u->getEmail() );
 388                         $this->executeReturnTo( 'success' );
 389                 }
 390         }
 391
 392         /**
 393          * @private
 394          * @return bool
 395          */
 396         function addNewAccount() {
 397                 global $wgContLang, $wgUser, $wgEmailAuthentication, $wgLoginLanguageSelector;
 398
 399                 # Create the account and abort if there's a problem doing so
 400                 $status = $this->addNewAccountInternal();
 401                 LoggerFactory::getInstance( 'authmanager' )->info( 'Account creation attempt', array(
 402                         'event' => 'accountcreation',
 403                         'status' => $status,
 404                 ) );
 405
 406                 if ( !$status->isGood() ) {
 407                         $error = $status->getMessage();
 408                         $this->mainLoginForm( $error->toString() );
 409
 410                         return false;
 411                 }
 412
 413                 $u = $status->getValue();
 414
 415                 # Only save preferences if the user is not creating an account for someone else.
 416                 if ( $this->getUser()->isAnon() ) {
 417                         # If we showed up language selection links, and one was in use, be
 418                         # smart (and sensible) and save that language as the user's preference
 419                         if ( $wgLoginLanguageSelector && $this->mLanguage ) {
 420                                 $u->setOption( 'language', $this->mLanguage );
 421                         } else {
 422
 423                                 # Otherwise the user's language preference defaults to $wgContLang,
 424                                 # but it may be better to set it to their preferred $wgContLang variant,
 425                                 # based on browser preferences or URL parameters.
 426                                 $u->setOption( 'language', $wgContLang->getPreferredVariant() );
 427                         }
 428                         if ( $wgContLang->hasVariants() ) {
 429                                 $u->setOption( 'variant', $wgContLang->getPreferredVariant() );
 430                         }
 431                 }
 432
 433                 $out = $this->getOutput();
 434
 435                 # Send out an email authentication message if needed
 436                 if ( $wgEmailAuthentication && Sanitizer::validateEmail( $u->getEmail() ) ) {
 437                         $status = $u->sendConfirmationMail();
 438                         if ( $status->isGood() ) {
 439                                 $out->addWikiMsg( 'confirmemail_oncreate' );
 440                         } else {
 441                                 $out->addWikiText( $status->getWikiText( 'confirmemail_sendfailed' ) );
 442                         }
 443                 }
 444
 445                 # Save settings (including confirmation token)
 446                 $u->saveSettings();
 447
 448                 # If not logged in, assume the new account as the current one and set
 449                 # session cookies then show a "welcome" message or a "need cookies"
 450                 # message as needed
 451                 if ( $this->getUser()->isAnon() ) {
 452                         $u->setCookies();
 453                         $wgUser = $u;
 454                         // This should set it for OutputPage and the Skin
 455                         // which is needed or the personal links will be
 456                         // wrong.
 457                         $this->getContext()->setUser( $u );
 458                         Hooks::run( 'AddNewAccount', array( $u, false ) );
 459                         $u->addNewUserLogEntry( 'create' );
 460                         if ( $this->hasSessionCookie() ) {
 461                                 $this->successfulCreation();
 462                         } else {
 463                                 $this->cookieRedirectCheck( 'new' );
 464                         }
 465                 } else {
 466                         # Confirm that the account was created
 467                         $out->setPageTitle( $this->msg( 'accountcreated' ) );
 468                         $out->addWikiMsg( 'accountcreatedtext', $u->getName() );
 469                         $out->addReturnTo( $this->getPageTitle() );
 470                         Hooks::run( 'AddNewAccount', array( $u, false ) );
 471                         $u->addNewUserLogEntry( 'create2', $this->mReason );
 472                 }
 473
 474                 return true;
 475         }
 476
 477         /**
 478          * Make a new user account using the loaded data.
 479          * @private
 480          * @throws PermissionsError|ReadOnlyError
 481          * @return Status
 482          */
 483         public function addNewAccountInternal() {
 484                 global $wgAuth, $wgMemc, $wgAccountCreationThrottle, $wgEmailConfirmToEdit;
 485
 486                 // If the user passes an invalid domain, something is fishy
 487                 if ( !$wgAuth->validDomain( $this->mDomain ) ) {
 488                         return Status::newFatal( 'wrongpassword' );
 489                 }
 490
 491                 // If we are not allowing users to login locally, we should be checking
 492                 // to see if the user is actually able to authenticate to the authenti-
 493                 // cation server before they create an account (otherwise, they can
 494                 // create a local account and login as any domain user). We only need
 495                 // to check this for domains that aren't local.
 496                 if ( 'local' != $this->mDomain && $this->mDomain != '' ) {
 497                         if (
 498                                 !$wgAuth->canCreateAccounts() &&
 499                                 (
 500                                         !$wgAuth->userExists( $this->mUsername ) ||
 501                                         !$wgAuth->authenticate( $this->mUsername, $this->mPassword )
 502                                 )
 503                         ) {
 504                                 return Status::newFatal( 'wrongpassword' );
 505                         }
 506                 }
 507
 508                 if ( wfReadOnly() ) {
 509                         throw new ReadOnlyError;
 510                 }
 511
 512                 # Request forgery checks.
 513                 if ( !self::getCreateaccountToken() ) {
 514                         self::setCreateaccountToken();
 515
 516                         return Status::newFatal( 'nocookiesfornew' );
 517                 }
 518
 519                 # The user didn't pass a createaccount token
 520                 if ( !$this->mToken ) {
 521                         return Status::newFatal( 'sessionfailure' );
 522                 }
 523
 524                 # Validate the createaccount token
 525                 if ( $this->mToken !== self::getCreateaccountToken() ) {
 526                         return Status::newFatal( 'sessionfailure' );
 527                 }
 528
 529                 # Check permissions
 530                 $currentUser = $this->getUser();
 531                 $creationBlock = $currentUser->isBlockedFromCreateAccount();
 532                 if ( !$currentUser->isAllowed( 'createaccount' ) ) {
 533                         throw new PermissionsError( 'createaccount' );
 534                 } elseif ( $creationBlock instanceof Block ) {
 535                         // Throws an ErrorPageError.
 536                         $this->userBlockedMessage( $creationBlock );
 537
 538                         // This should never be reached.
 539                         return false;
 540                 }
 541
 542                 # Include checks that will include GlobalBlocking (Bug 38333)
 543                 $permErrors = $this->getPageTitle()->getUserPermissionsErrors(
 544                         'createaccount',
 545                         $currentUser,
 546                         true
 547                 );
 548
 549                 if ( count( $permErrors ) ) {
 550                         throw new PermissionsError( 'createaccount', $permErrors );
 551                 }
 552
 553                 $ip = $this->getRequest()->getIP();
 554                 if ( $currentUser->isDnsBlacklisted( $ip, true /* check $wgProxyWhitelist */ ) ) {
 555                         return Status::newFatal( 'sorbs_create_account_reason' );
 556                 }
 557
 558                 # Now create a dummy user ($u) and check if it is valid
 559                 $u = User::newFromName( $this->mUsername, 'creatable' );
 560                 if ( !$u ) {
 561                         return Status::newFatal( 'noname' );
 562                 }
 563
 564                 # Make sure the user does not exist already
 565                 $lock = $wgMemc->getScopedLock( wfGlobalCacheKey( 'account', md5( $this->mUsername ) ) );
 566                 if ( !$lock ) {
 567                         return Status::newFatal( 'usernameinprogress' );
 568                 } elseif ( $u->idForName( User::READ_LOCKING ) ) {
 569                         return Status::newFatal( 'userexists' );
 570                 }
 571
 572                 if ( $this->mCreateaccountMail ) {
 573                         # do not force a password for account creation by email
 574                         # set invalid password, it will be replaced later by a random generated password
 575                         $this->mPassword = null;
 576                 } else {
 577                         if ( $this->mPassword !== $this->mRetype ) {
 578                                 return Status::newFatal( 'badretype' );
 579                         }
 580
 581                         # check for password validity, return a fatal Status if invalid
 582                         $validity = $u->checkPasswordValidity( $this->mPassword, 'create' );
 583                         if ( !$validity->isGood() ) {
 584                                 $validity->ok = false; // make sure this Status is fatal
 585                                 return $validity;
 586                         }
 587                 }
 588
 589                 # if you need a confirmed email address to edit, then obviously you
 590                 # need an email address.
 591                 if ( $wgEmailConfirmToEdit && strval( $this->mEmail ) === '' ) {
 592                         return Status::newFatal( 'noemailtitle' );
 593                 }
 594
 595                 if ( strval( $this->mEmail ) !== '' && !Sanitizer::validateEmail( $this->mEmail ) ) {
 596                         return Status::newFatal( 'invalidemailaddress' );
 597                 }
 598
 599                 # Set some additional data so the AbortNewAccount hook can be used for
 600                 # more than just username validation
 601                 $u->setEmail( $this->mEmail );
 602                 $u->setRealName( $this->mRealName );
 603
 604                 $abortError = '';
 605                 $abortStatus = null;
 606                 if ( !Hooks::run( 'AbortNewAccount', array( $u, &$abortError, &$abortStatus ) ) ) {
 607                         // Hook point to add extra creation throttles and blocks
 608                         wfDebug( "LoginForm::addNewAccountInternal: a hook blocked creation\n" );
 609                         if ( $abortStatus === null ) {
 610                                 // Report back the old string as a raw message status.
 611                                 // This will report the error back as 'createaccount-hook-aborted'
 612                                 // with the given string as the message.
 613                                 // To return a different error code, return a Status object.
 614                                 $abortError = new Message( 'createaccount-hook-aborted', array( $abortError ) );
 615                                 $abortError->text();
 616
 617                                 return Status::newFatal( $abortError );
 618                         } else {
 619                                 // For MediaWiki 1.23+ and updated hooks, return the Status object
 620                                 // returned from the hook.
 621                                 return $abortStatus;
 622                         }
 623                 }
 624
 625                 // Hook point to check for exempt from account creation throttle
 626                 if ( !Hooks::run( 'ExemptFromAccountCreationThrottle', array( $ip ) ) ) {
 627                         wfDebug( "LoginForm::exemptFromAccountCreationThrottle: a hook " .
 628                                 "allowed account creation w/o throttle\n" );
 629                 } else {
 630                         if ( ( $wgAccountCreationThrottle && $currentUser->isPingLimitable() ) ) {
 631                                 $key = wfMemcKey( 'acctcreate', 'ip', $ip );
 632                                 $value = $wgMemc->get( $key );
 633                                 if ( !$value ) {
 634                                         $wgMemc->set( $key, 0, 86400 );
 635                                 }
 636                                 if ( $value >= $wgAccountCreationThrottle ) {
 637                                         return Status::newFatal( 'acct_creation_throttle_hit', $wgAccountCreationThrottle );
 638                                 }
 639                                 $wgMemc->incr( $key );
 640                         }
 641                 }
 642
 643                 if ( !$wgAuth->addUser( $u, $this->mPassword, $this->mEmail, $this->mRealName ) ) {
 644                         return Status::newFatal( 'externaldberror' );
 645                 }
 646
 647                 self::clearCreateaccountToken();
 648
 649                 return $this->initUser( $u, false );
 650         }
 651
 652         /**
 653          * Actually add a user to the database.
 654          * Give it a User object that has been initialised with a name.
 655          *
 656          * @param User $u
 657          * @param bool $autocreate True if this is an autocreation via auth plugin
 658          * @return Status Status object, with the User object in the value member on success
 659          * @private
 660          */
 661         function initUser( $u, $autocreate ) {
 662                 global $wgAuth;
 663
 664                 $status = $u->addToDatabase();
 665                 if ( !$status->isOK() ) {
 666                         return $status;
 667                 }
 668
 669                 if ( $wgAuth->allowPasswordChange() ) {
 670                         $u->setPassword( $this->mPassword );
 671                 }
 672
 673                 $u->setEmail( $this->mEmail );
 674                 $u->setRealName( $this->mRealName );
 675                 $u->setToken();
 676
 677                 Hooks::run( 'LocalUserCreated', array( $u, $autocreate ) );
 678                 $oldUser = $u;
 679                 $wgAuth->initUser( $u, $autocreate );
 680                 if ( $oldUser !== $u ) {
 681                         wfWarn( get_class( $wgAuth ) . '::initUser() replaced the user object' );
 682                 }
 683
 684                 $u->saveSettings();
 685
 686                 // Update user count
 687                 DeferredUpdates::addUpdate( new SiteStatsUpdate( 0, 0, 0, 0, 1 ) );
 688
 689                 // Watch user's userpage and talk page
 690                 $u->addWatch( $u->getUserPage(), WatchedItem::IGNORE_USER_RIGHTS );
 691
 692                 return Status::newGood( $u );
 693         }
 694
 695         /**
 696          * Internally authenticate the login request.
 697          *
 698          * This may create a local account as a side effect if the
 699          * authentication plugin allows transparent local account
 700          * creation.
 701          * @return int
 702          */
 703         public function authenticateUserData() {
 704                 global $wgUser, $wgAuth;
 705
 706                 $this->load();
 707
 708                 if ( $this->mUsername == '' ) {
 709                         return self::NO_NAME;
 710                 }
 711
 712                 // We require a login token to prevent login CSRF
 713                 // Handle part of this before incrementing the throttle so
 714                 // token-less login attempts don't count towards the throttle
 715                 // but wrong-token attempts do.
 716
 717                 // If the user doesn't have a login token yet, set one.
 718                 if ( !self::getLoginToken() ) {
 719                         self::setLoginToken();
 720
 721                         return self::NEED_TOKEN;
 722                 }
 723                 // If the user didn't pass a login token, tell them we need one
 724                 if ( !$this->mToken ) {
 725                         return self::NEED_TOKEN;
 726                 }
 727
 728                 $throttleCount = self::incLoginThrottle( $this->mUsername );
 729                 if ( $throttleCount === true ) {
 730                         return self::THROTTLED;
 731                 }
 732
 733                 // Validate the login token
 734                 if ( $this->mToken !== self::getLoginToken() ) {
 735                         return self::WRONG_TOKEN;
 736                 }
 737
 738                 // Load the current user now, and check to see if we're logging in as
 739                 // the same name. This is necessary because loading the current user
 740                 // (say by calling getName()) calls the UserLoadFromSession hook, which
 741                 // potentially creates the user in the database. Until we load $wgUser,
 742                 // checking for user existence using User::newFromName($name)->getId() below
 743                 // will effectively be using stale data.
 744                 if ( $this->getUser()->getName() === $this->mUsername ) {
 745                         wfDebug( __METHOD__ . ": already logged in as {$this->mUsername}\n" );
 746
 747                         return self::SUCCESS;
 748                 }
 749
 750                 $u = User::newFromName( $this->mUsername );
 751                 if ( $u === false ) {
 752                         return self::ILLEGAL;
 753                 }
 754
 755                 $msg = null;
 756                 // Give extensions a way to indicate the username has been updated,
 757                 // rather than telling the user the account doesn't exist.
 758                 if ( !Hooks::run( 'LoginUserMigrated', array( $u, &$msg ) ) ) {
 759                         $this->mAbortLoginErrorMsg = $msg;
 760                         return self::USER_MIGRATED;
 761                 }
 762
 763                 if ( !User::isUsableName( $u->getName() ) ) {
 764                         return self::ILLEGAL;
 765                 }
 766
 767                 $isAutoCreated = false;
 768                 if ( $u->getID() == 0 ) {
 769                         $status = $this->attemptAutoCreate( $u );
 770                         if ( $status !== self::SUCCESS ) {
 771                                 return $status;
 772                         } else {
 773                                 $isAutoCreated = true;
 774                         }
 775                 } else {
 776                         $u->load();
 777                 }
 778
 779                 // Give general extensions, such as a captcha, a chance to abort logins
 780                 $abort = self::ABORTED;
 781                 if ( !Hooks::run( 'AbortLogin', array( $u, $this->mPassword, &$abort, &$msg ) ) ) {
 782                         $this->mAbortLoginErrorMsg = $msg;
 783
 784                         return $abort;
 785                 }
 786
 787                 global $wgBlockDisablesLogin;
 788                 if ( !$u->checkPassword( $this->mPassword ) ) {
 789                         if ( $u->checkTemporaryPassword( $this->mPassword ) ) {
 790                                 // The e-mailed temporary password should not be used for actu-
 791                                 // al logins; that's a very sloppy habit, and insecure if an
 792                                 // attacker has a few seconds to click "search" on someone's o-
 793                                 // pen mail reader.
 794                                 //
 795                                 // Allow it to be used only to reset the password a single time
 796                                 // to a new value, which won't be in the user's e-mail ar-
 797                                 // chives.
 798                                 //
 799                                 // For backwards compatibility, we'll still recognize it at the
 800                                 // login form to minimize surprises for people who have been
 801                                 // logging in with a temporary password for some time.
 802                                 //
 803                                 // As a side-effect, we can authenticate the user's e-mail ad-
 804                                 // dress if it's not already done, since the temporary password
 805                                 // was sent via e-mail.
 806                                 if ( !$u->isEmailConfirmed() && !wfReadOnly() ) {
 807                                         $u->confirmEmail();
 808                                         $u->saveSettings();
 809                                 }
 810
 811                                 // At this point we just return an appropriate code/ indicating
 812                                 // that the UI should show a password reset form; bot inter-
 813                                 // faces etc will probably just fail cleanly here.
 814                                 $this->mAbortLoginErrorMsg = 'resetpass-temp-emailed';
 815                                 $this->mTempPasswordUsed = true;
 816                                 $retval = self::RESET_PASS;
 817                         } else {
 818                                 $retval = ( $this->mPassword == '' ) ? self::EMPTY_PASS : self::WRONG_PASS;
 819                         }
 820                 } elseif ( $wgBlockDisablesLogin && $u->isBlocked() ) {
 821                         // If we've enabled it, make it so that a blocked user cannot login
 822                         $retval = self::USER_BLOCKED;
 823                 } elseif ( $u->getPasswordExpired() == 'hard' ) {
 824                         // Force reset now, without logging in
 825                         $retval = self::RESET_PASS;
 826                         $this->mAbortLoginErrorMsg = 'resetpass-expired';
 827                 } else {
 828                         Hooks::run( 'UserLoggedIn', array( $u ) );
 829                         $oldUser = $u;
 830                         $wgAuth->updateUser( $u );
 831                         if ( $oldUser !== $u ) {
 832                                 wfWarn( get_class( $wgAuth ) . '::updateUser() replaced the user object' );
 833                         }
 834                         $wgUser = $u;
 835                         // This should set it for OutputPage and the Skin
 836                         // which is needed or the personal links will be
 837                         // wrong.
 838                         $this->getContext()->setUser( $u );
 839
 840                         // Please reset throttle for successful logins, thanks!
 841                         if ( $throttleCount ) {
 842                                 self::clearLoginThrottle( $this->mUsername );
 843                         }
 844
 845                         if ( $isAutoCreated ) {
 846                                 // Must be run after $wgUser is set, for correct new user log
 847                                 Hooks::run( 'AuthPluginAutoCreate', array( $u ) );
 848                         }
 849
 850                         $retval = self::SUCCESS;
 851                 }
 852                 Hooks::run( 'LoginAuthenticateAudit', array( $u, $this->mPassword, $retval ) );
 853
 854                 return $retval;
 855         }
 856
 857         /**
 858          * Increment the login attempt throttle hit count for the (username,current IP)
 859          * tuple unless the throttle was already reached.
 860          * @param string $username The user name
 861          * @return bool|int The integer hit count or True if it is already at the limit
 862          */
 863         public static function incLoginThrottle( $username ) {
 864                 global $wgPasswordAttemptThrottle, $wgMemc, $wgRequest;
 865                 $username = trim( $username ); // sanity
 866
 867                 $throttleCount = 0;
 868                 if ( is_array( $wgPasswordAttemptThrottle ) ) {
 869                         $throttleKey = wfMemcKey( 'password-throttle', $wgRequest->getIP(), md5( $username ) );
 870                         $count = $wgPasswordAttemptThrottle['count'];
 871                         $period = $wgPasswordAttemptThrottle['seconds'];
 872
 873                         $throttleCount = $wgMemc->get( $throttleKey );
 874                         if ( !$throttleCount ) {
 875                                 $wgMemc->add( $throttleKey, 1, $period ); // start counter
 876                         } elseif ( $throttleCount < $count ) {
 877                                 $wgMemc->incr( $throttleKey );
 878                         } elseif ( $throttleCount >= $count ) {
 879                                 return true;
 880                         }
 881                 }
 882
 883                 return $throttleCount;
 884         }
 885
 886         /**
 887          * Clear the login attempt throttle hit count for the (username,current IP) tuple.
 888          * @param string $username The user name
 889          * @return void
 890          */
 891         public static function clearLoginThrottle( $username ) {
 892                 global $wgMemc, $wgRequest;
 893                 $username = trim( $username ); // sanity
 894
 895                 $throttleKey = wfMemcKey( 'password-throttle', $wgRequest->getIP(), md5( $username ) );
 896                 $wgMemc->delete( $throttleKey );
 897         }
 898
 899         /**
 900          * Attempt to automatically create a user on login. Only succeeds if there
 901          * is an external authentication method which allows it.
 902          *
 903          * @param User $user
 904          *
 905          * @return int Status code
 906          */
 907         function attemptAutoCreate( $user ) {
 908                 global $wgAuth;
 909
 910                 if ( $this->getUser()->isBlockedFromCreateAccount() ) {
 911                         wfDebug( __METHOD__ . ": user is blocked from account creation\n" );
 912
 913                         return self::CREATE_BLOCKED;
 914                 }
 915
 916                 if ( !$wgAuth->autoCreate() ) {
 917                         return self::NOT_EXISTS;
 918                 }
 919
 920                 if ( !$wgAuth->userExists( $user->getName() ) ) {
 921                         wfDebug( __METHOD__ . ": user does not exist\n" );
 922
 923                         return self::NOT_EXISTS;
 924                 }
 925
 926                 if ( !$wgAuth->authenticate( $user->getName(), $this->mPassword ) ) {
 927                         wfDebug( __METHOD__ . ": \$wgAuth->authenticate() returned false, aborting\n" );
 928
 929                         return self::WRONG_PLUGIN_PASS;
 930                 }
 931
 932                 $abortError = '';
 933                 if ( !Hooks::run( 'AbortAutoAccount', array( $user, &$abortError ) ) ) {
 934                         // Hook point to add extra creation throttles and blocks
 935                         wfDebug( "LoginForm::attemptAutoCreate: a hook blocked creation: $abortError\n" );
 936                         $this->mAbortLoginErrorMsg = $abortError;
 937
 938                         return self::ABORTED;
 939                 }
 940
 941                 wfDebug( __METHOD__ . ": creating account\n" );
 942                 $status = $this->initUser( $user, true );
 943
 944                 if ( !$status->isOK() ) {
 945                         $errors = $status->getErrorsByType( 'error' );
 946                         $this->mAbortLoginErrorMsg = $errors[0]['message'];
 947
 948                         return self::ABORTED;
 949                 }
 950
 951                 return self::SUCCESS;
 952         }
 953
 954         function processLogin() {
 955                 global $wgMemc, $wgLang, $wgSecureLogin, $wgPasswordAttemptThrottle,
 956                         $wgInvalidPasswordReset;
 957
 958                 $authRes = $this->authenticateUserData();
 959                 switch ( $authRes ) {
 960                         case self::SUCCESS:
 961                                 # We've verified now, update the real record
 962                                 $user = $this->getUser();
 963                                 $user->touch();
 964
 965                                 if ( $user->requiresHTTPS() ) {
 966                                         $this->mStickHTTPS = true;
 967                                 }
 968
 969                                 if ( $wgSecureLogin && !$this->mStickHTTPS ) {
 970                                         $user->setCookies( $this->mRequest, false, $this->mRemember );
 971                                 } else {
 972                                         $user->setCookies( $this->mRequest, null, $this->mRemember );
 973                                 }
 974                                 self::clearLoginToken();
 975
 976                                 // Reset the throttle
 977                                 $request = $this->getRequest();
 978                                 $key = wfMemcKey( 'password-throttle', $request->getIP(), md5( $this->mUsername ) );
 979                                 $wgMemc->delete( $key );
 980
 981                                 if ( $this->hasSessionCookie() || $this->mSkipCookieCheck ) {
 982                                         /* Replace the language object to provide user interface in
 983                                          * correct language immediately on this first page load.
 984                                          */
 985                                         $code = $request->getVal( 'uselang', $user->getOption( 'language' ) );
 986                                         $userLang = Language::factory( $code );
 987                                         $wgLang = $userLang;
 988                                         $this->getContext()->setLanguage( $userLang );
 989                                         // Reset SessionID on Successful login (bug 40995)
 990                                         $this->renewSessionId();
 991                                         if ( $this->getUser()->getPasswordExpired() == 'soft' ) {
 992                                                 $this->resetLoginForm( $this->msg( 'resetpass-expired-soft' ) );
 993                                         } elseif ( $wgInvalidPasswordReset
 994                                                 && !$user->isValidPassword( $this->mPassword )
 995                                         ) {
 996                                                 $status = $user->checkPasswordValidity(
 997                                                         $this->mPassword,
 998                                                         'login'
 999                                                 );
1000                                                 $this->resetLoginForm(
1001                                                         $status->getMessage( 'resetpass-validity-soft' )
1002                                                 );
1003                                         } else {
1004                                                 $this->successfulLogin();
1005                                         }
1006                                 } else {
1007                                         $this->cookieRedirectCheck( 'login' );
1008                                 }
1009                                 break;
1010
1011                         case self::NEED_TOKEN:
1012                                 $error = $this->mAbortLoginErrorMsg ?: 'nocookiesforlogin';
1013                                 $this->mainLoginForm( $this->msg( $error )->parse() );
1014                                 break;
1015                         case self::WRONG_TOKEN:
1016                                 $error = $this->mAbortLoginErrorMsg ?: 'sessionfailure';
1017                                 $this->mainLoginForm( $this->msg( $error )->text() );
1018                                 break;
1019                         case self::NO_NAME:
1020                         case self::ILLEGAL:
1021                                 $error = $this->mAbortLoginErrorMsg ?: 'noname';
1022                                 $this->mainLoginForm( $this->msg( $error )->text() );
1023                                 break;
1024                         case self::WRONG_PLUGIN_PASS:
1025                                 $error = $this->mAbortLoginErrorMsg ?: 'wrongpassword';
1026                                 $this->mainLoginForm( $this->msg( $error )->text() );
1027                                 break;
1028                         case self::NOT_EXISTS:
1029                                 if ( $this->getUser()->isAllowed( 'createaccount' ) ) {
1030                                         $error = $this->mAbortLoginErrorMsg ?: 'nosuchuser';
1031                                         $this->mainLoginForm( $this->msg( $error,
1032                                                 wfEscapeWikiText( $this->mUsername ) )->parse() );
1033                                 } else {
1034                                         $error = $this->mAbortLoginErrorMsg ?: 'nosuchusershort';
1035                                         $this->mainLoginForm( $this->msg( $error,
1036                                                 wfEscapeWikiText( $this->mUsername ) )->text() );
1037                                 }
1038                                 break;
1039                         case self::WRONG_PASS:
1040                                 $error = $this->mAbortLoginErrorMsg ?: 'wrongpassword';
1041                                 $this->mainLoginForm( $this->msg( $error )->text() );
1042                                 break;
1043                         case self::EMPTY_PASS:
1044                                 $error = $this->mAbortLoginErrorMsg ?: 'wrongpasswordempty';
1045                                 $this->mainLoginForm( $this->msg( $error )->text() );
1046                                 break;
1047                         case self::RESET_PASS:
1048                                 $error = $this->mAbortLoginErrorMsg ?: 'resetpass_announce';
1049                                 $this->resetLoginForm( $this->msg( $error ) );
1050                                 break;
1051                         case self::CREATE_BLOCKED:
1052                                 $this->userBlockedMessage( $this->getUser()->isBlockedFromCreateAccount() );
1053                                 break;
1054                         case self::THROTTLED:
1055                                 $error = $this->mAbortLoginErrorMsg ?: 'login-throttled';
1056                                 $this->mainLoginForm( $this->msg( $error )
1057                                         ->params( $this->getLanguage()->formatDuration( $wgPasswordAttemptThrottle['seconds'] ) )
1058                                         ->text()
1059                                 );
1060                                 break;
1061                         case self::USER_BLOCKED:
1062                                 $error = $this->mAbortLoginErrorMsg ?: 'login-userblocked';
1063                                 $this->mainLoginForm( $this->msg( $error, $this->mUsername )->escaped() );
1064                                 break;
1065                         case self::ABORTED:
1066                                 $error = $this->mAbortLoginErrorMsg ?: 'login-abort-generic';
1067                                 $this->mainLoginForm( $this->msg( $error,
1068                                                 wfEscapeWikiText( $this->mUsername ) )->text() );
1069                                 break;
1070                         case self::USER_MIGRATED:
1071                                 $error = $this->mAbortLoginErrorMsg ?: 'login-migrated-generic';
1072                                 $params = array();
1073                                 if ( is_array( $error ) ) {
1074                                         $error = array_shift( $this->mAbortLoginErrorMsg );
1075                                         $params = $this->mAbortLoginErrorMsg;
1076                                 }
1077                                 $this->mainLoginForm( $this->msg( $error, $params )->text() );
1078                                 break;
1079                         default:
1080                                 throw new MWException( 'Unhandled case value' );
1081                 }
1082
1083                 LoggerFactory::getInstance( 'authmanager' )->info( 'Login attempt', array(
1084                         'event' => 'login',
1085                         'successful' => $authRes === self::SUCCESS,
1086                         'status' => LoginForm::$statusCodes[$authRes],
1087                 ) );
1088         }
1089
1090         /**
1091          * Show the Special:ChangePassword form, with custom message
1092          * @param Message $msg
1093          */
1094         protected function resetLoginForm( Message $msg ) {
1095                 // Allow hooks to explain this password reset in more detail
1096                 Hooks::run( 'LoginPasswordResetMessage', array( &$msg, $this->mUsername ) );
1097                 $reset = new SpecialChangePassword();
1098                 $derivative = new DerivativeContext( $this->getContext() );
1099                 $derivative->setTitle( $reset->getPageTitle() );
1100                 $reset->setContext( $derivative );
1101                 if ( !$this->mTempPasswordUsed ) {
1102                         $reset->setOldPasswordMessage( 'oldpassword' );
1103                 }
1104                 $reset->setChangeMessage( $msg );
1105                 $reset->execute( null );
1106         }
1107
1108         /**
1109          * @param User $u
1110          * @param bool $throttle
1111          * @param string $emailTitle Message name of email title
1112          * @param string $emailText Message name of email text
1113          * @return Status
1114          */
1115         function mailPasswordInternal( $u, $throttle = true, $emailTitle = 'passwordremindertitle',
1116                 $emailText = 'passwordremindertext'
1117         ) {
1118                 global $wgNewPasswordExpiry;
1119
1120                 if ( $u->getEmail() == '' ) {
1121                         return Status::newFatal( 'noemail', $u->getName() );
1122                 }
1123                 $ip = $this->getRequest()->getIP();
1124                 if ( !$ip ) {
1125                         return Status::newFatal( 'badipaddress' );
1126                 }
1127
1128                 $currentUser = $this->getUser();
1129                 Hooks::run( 'User::mailPasswordInternal', array( &$currentUser, &$ip, &$u ) );
1130
1131                 $np = $u->randomPassword();
1132                 $u->setNewpassword( $np, $throttle );
1133                 $u->saveSettings();
1134                 $userLanguage = $u->getOption( 'language' );
1135
1136                 $mainPage = Title::newMainPage();
1137                 $mainPageUrl = $mainPage->getCanonicalURL();
1138
1139                 $m = $this->msg( $emailText, $ip, $u->getName(), $np, '<' . $mainPageUrl . '>',
1140                         round( $wgNewPasswordExpiry / 86400 ) )->inLanguage( $userLanguage )->text();
1141                 $result = $u->sendMail( $this->msg( $emailTitle )->inLanguage( $userLanguage )->text(), $m );
1142
1143                 return $result;
1144         }
1145
1146         /**
1147          * Run any hooks registered for logins, then HTTP redirect to
1148          * $this->mReturnTo (or Main Page if that's undefined).  Formerly we had a
1149          * nice message here, but that's really not as useful as just being sent to
1150          * wherever you logged in from.  It should be clear that the action was
1151          * successful, given the lack of error messages plus the appearance of your
1152          * name in the upper right.
1153          *
1154          * @private
1155          */
1156         function successfulLogin() {
1157                 # Run any hooks; display injected HTML if any, else redirect
1158                 $currentUser = $this->getUser();
1159                 $injected_html = '';
1160                 Hooks::run( 'UserLoginComplete', array( &$currentUser, &$injected_html ) );
1161
1162                 if ( $injected_html !== '' ) {
1163                         $this->displaySuccessfulAction( 'success', $this->msg( 'loginsuccesstitle' ),
1164                                 'loginsuccess', $injected_html );
1165                 } else {
1166                         $this->executeReturnTo( 'successredirect' );
1167                 }
1168         }
1169
1170         /**
1171          * Run any hooks registered for logins, then display a message welcoming
1172          * the user.
1173          *
1174          * @private
1175          */
1176         function successfulCreation() {
1177                 # Run any hooks; display injected HTML
1178                 $currentUser = $this->getUser();
1179                 $injected_html = '';
1180                 $welcome_creation_msg = 'welcomecreation-msg';
1181
1182                 Hooks::run( 'UserLoginComplete', array( &$currentUser, &$injected_html ) );
1183
1184                 /**
1185                  * Let any extensions change what message is shown.
1186                  * @see https://www.mediawiki.org/wiki/Manual:Hooks/BeforeWelcomeCreation
1187                  * @since 1.18
1188                  */
1189                 Hooks::run( 'BeforeWelcomeCreation', array( &$welcome_creation_msg, &$injected_html ) );
1190
1191                 $this->displaySuccessfulAction(
1192                         'signup',
1193                         $this->msg( 'welcomeuser', $this->getUser()->getName() ),
1194                         $welcome_creation_msg, $injected_html
1195                 );
1196         }
1197
1198         /**
1199          * Display a "successful action" page.
1200          *
1201          * @param string $type Condition of return to; see `executeReturnTo`
1202          * @param string|Message $title Page's title
1203          * @param string $msgname
1204          * @param string $injected_html
1205          */
1206         private function displaySuccessfulAction( $type, $title, $msgname, $injected_html ) {
1207                 $out = $this->getOutput();
1208                 $out->setPageTitle( $title );
1209                 if ( $msgname ) {
1210                         $out->addWikiMsg( $msgname, wfEscapeWikiText( $this->getUser()->getName() ) );
1211                 }
1212
1213                 $out->addHTML( $injected_html );
1214
1215                 $this->executeReturnTo( $type );
1216         }
1217
1218         /**
1219          * Output a message that informs the user that they cannot create an account because
1220          * there is a block on them or their IP which prevents account creation.  Note that
1221          * User::isBlockedFromCreateAccount(), which gets this block, ignores the 'hardblock'
1222          * setting on blocks (bug 13611).
1223          * @param Block $block The block causing this error
1224          * @throws ErrorPageError
1225          */
1226         function userBlockedMessage( Block $block ) {
1227                 # Let's be nice about this, it's likely that this feature will be used
1228                 # for blocking large numbers of innocent people, e.g. range blocks on
1229                 # schools. Don't blame it on the user. There's a small chance that it
1230                 # really is the user's fault, i.e. the username is blocked and they
1231                 # haven't bothered to log out before trying to create an account to
1232                 # evade it, but we'll leave that to their guilty conscience to figure
1233                 # out.
1234                 $errorParams = array(
1235                         $block->getTarget(),
1236                         $block->mReason ? $block->mReason : $this->msg( 'blockednoreason' )->text(),
1237                         $block->getByName()
1238                 );
1239
1240                 if ( $block->getType() === Block::TYPE_RANGE ) {
1241                         $errorMessage = 'cantcreateaccount-range-text';
1242                         $errorParams[] = $this->getRequest()->getIP();
1243                 } else {
1244                         $errorMessage = 'cantcreateaccount-text';
1245                 }
1246
1247                 throw new ErrorPageError(
1248                         'cantcreateaccounttitle',
1249                         $errorMessage,
1250                         $errorParams
1251                 );
1252         }
1253
1254         /**
1255          * Add a "return to" link or redirect to it.
1256          * Extensions can use this to reuse the "return to" logic after
1257          * inject steps (such as redirection) into the login process.
1258          *
1259          * @param string $type One of the following:
1260          *    - error: display a return to link ignoring $wgRedirectOnLogin
1261          *    - signup: display a return to link using $wgRedirectOnLogin if needed
1262          *    - success: display a return to link using $wgRedirectOnLogin if needed
1263          *    - successredirect: send an HTTP redirect using $wgRedirectOnLogin if needed
1264          * @param string $returnTo
1265          * @param array|string $returnToQuery
1266          * @param bool $stickHTTPs Keep redirect link on HTTPs
1267          * @since 1.22
1268          */
1269         public function showReturnToPage(
1270                 $type, $returnTo = '', $returnToQuery = '', $stickHTTPs = false
1271         ) {
1272                 $this->mReturnTo = $returnTo;
1273                 $this->mReturnToQuery = $returnToQuery;
1274                 $this->mStickHTTPS = $stickHTTPs;
1275                 $this->executeReturnTo( $type );
1276         }
1277
1278         /**
1279          * Add a "return to" link or redirect to it.
1280          *
1281          * @param string $type One of the following:
1282          *    - error: display a return to link ignoring $wgRedirectOnLogin
1283          *    - signup: display a return to link using $wgRedirectOnLogin if needed
1284          *    - success: display a return to link using $wgRedirectOnLogin if needed
1285          *    - successredirect: send an HTTP redirect using $wgRedirectOnLogin if needed
1286          */
1287         private function executeReturnTo( $type ) {
1288                 global $wgRedirectOnLogin, $wgSecureLogin;
1289
1290                 if ( $type != 'error' && $wgRedirectOnLogin !== null ) {
1291                         $returnTo = $wgRedirectOnLogin;
1292                         $returnToQuery = array();
1293                 } else {
1294                         $returnTo = $this->mReturnTo;
1295                         $returnToQuery = wfCgiToArray( $this->mReturnToQuery );
1296                 }
1297
1298                 // Allow modification of redirect behavior
1299                 Hooks::run( 'PostLoginRedirect', array( &$returnTo, &$returnToQuery, &$type ) );
1300
1301                 $returnToTitle = Title::newFromText( $returnTo );
1302                 if ( !$returnToTitle ) {
1303                         $returnToTitle = Title::newMainPage();
1304                 }
1305
1306                 if ( $wgSecureLogin && !$this->mStickHTTPS ) {
1307                         $options = array( 'http' );
1308                         $proto = PROTO_HTTP;
1309                 } elseif ( $wgSecureLogin ) {
1310                         $options = array( 'https' );
1311                         $proto = PROTO_HTTPS;
1312                 } else {
1313                         $options = array();
1314                         $proto = PROTO_RELATIVE;
1315                 }
1316
1317                 if ( $type == 'successredirect' ) {
1318                         $redirectUrl = $returnToTitle->getFullURL( $returnToQuery, false, $proto );
1319                         $this->getOutput()->redirect( $redirectUrl );
1320                 } else {
1321                         $this->getOutput()->addReturnTo( $returnToTitle, $returnToQuery, null, $options );
1322                 }
1323         }
1324
1325         /**
1326          * @param string $msg
1327          * @param string $msgtype
1328          * @throws ErrorPageError
1329          * @throws Exception
1330          * @throws FatalError
1331          * @throws MWException
1332          * @throws PermissionsError
1333          * @throws ReadOnlyError
1334          * @private
1335          */
1336         function mainLoginForm( $msg, $msgtype = 'error' ) {
1337                 global $wgEnableEmail, $wgEnableUserEmail;
1338                 global $wgHiddenPrefs, $wgLoginLanguageSelector;
1339                 global $wgAuth, $wgEmailConfirmToEdit;
1340                 global $wgSecureLogin, $wgPasswordResetRoutes;
1341                 global $wgExtendedLoginCookieExpiration, $wgCookieExpiration;
1342
1343                 $titleObj = $this->getPageTitle();
1344                 $user = $this->getUser();
1345                 $out = $this->getOutput();
1346
1347                 if ( $this->mType == 'signup' ) {
1348                         // Block signup here if in readonly. Keeps user from
1349                         // going through the process (filling out data, etc)
1350                         // and being informed later.
1351                         $permErrors = $titleObj->getUserPermissionsErrors( 'createaccount', $user, true );
1352                         if ( count( $permErrors ) ) {
1353                                 throw new PermissionsError( 'createaccount', $permErrors );
1354                         } elseif ( $user->isBlockedFromCreateAccount() ) {
1355                                 $this->userBlockedMessage( $user->isBlockedFromCreateAccount() );
1356
1357                                 return;
1358                         } elseif ( wfReadOnly() ) {
1359                                 throw new ReadOnlyError;
1360                         }
1361                 }
1362
1363                 // Pre-fill username (if not creating an account, bug 44775).
1364                 if ( $this->mUsername == '' && $this->mType != 'signup' ) {
1365                         if ( $user->isLoggedIn() ) {
1366                                 $this->mUsername = $user->getName();
1367                         } else {
1368                                 $this->mUsername = $this->getRequest()->getCookie( 'UserName' );
1369                         }
1370                 }
1371
1372                 // Generic styles and scripts for both login and signup form
1373                 $out->addModuleStyles( array(
1374                         'mediawiki.ui',
1375                         'mediawiki.ui.button',
1376                         'mediawiki.ui.checkbox',
1377                         'mediawiki.ui.input',
1378                         'mediawiki.special.userlogin.common.styles'
1379                 ) );
1380
1381                 if ( $this->mType == 'signup' ) {
1382                         // XXX hack pending RL or JS parse() support for complex content messages
1383                         // https://phabricator.wikimedia.org/T27349
1384                         $out->addJsConfigVars( 'wgCreateacctImgcaptchaHelp',
1385                                 $this->msg( 'createacct-imgcaptcha-help' )->parse() );
1386
1387                         // Additional styles and scripts for signup form
1388                         $out->addModules( array(
1389                                 'mediawiki.special.userlogin.signup.js'
1390                         ) );
1391                         $out->addModuleStyles( array(
1392                                 'mediawiki.special.userlogin.signup.styles'
1393                         ) );
1394
1395                         $template = new UsercreateTemplate( $this->getConfig() );
1396
1397                         // Must match number of benefits defined in messages
1398                         $template->set( 'benefitCount', 3 );
1399
1400                         $q = 'action=submitlogin&type=signup';
1401                         $linkq = 'type=login';
1402                 } else {
1403                         // Additional styles for login form
1404                         $out->addModuleStyles( array(
1405                                 'mediawiki.special.userlogin.login.styles'
1406                         ) );
1407
1408                         $template = new UserloginTemplate( $this->getConfig() );
1409
1410                         $q = 'action=submitlogin&type=login';
1411                         $linkq = 'type=signup';
1412                 }
1413
1414                 if ( $this->mReturnTo !== '' ) {
1415                         $returnto = '&returnto=' . wfUrlencode( $this->mReturnTo );
1416                         if ( $this->mReturnToQuery !== '' ) {
1417                                 $returnto .= '&returntoquery=' .
1418                                         wfUrlencode( $this->mReturnToQuery );
1419                         }
1420                         $q .= $returnto;
1421                         $linkq .= $returnto;
1422                 }
1423
1424                 # Don't show a "create account" link if the user can't.
1425                 if ( $this->showCreateOrLoginLink( $user ) ) {
1426                         # Pass any language selection on to the mode switch link
1427                         if ( $wgLoginLanguageSelector && $this->mLanguage ) {
1428                                 $linkq .= '&uselang=' . $this->mLanguage;
1429                         }
1430                         // Supply URL, login template creates the button.
1431                         $template->set( 'createOrLoginHref', $titleObj->getLocalURL( $linkq ) );
1432                 } else {
1433                         $template->set( 'link', '' );
1434                 }
1435
1436                 $resetLink = $this->mType == 'signup'
1437                         ? null
1438                         : is_array( $wgPasswordResetRoutes ) && in_array( true, array_values( $wgPasswordResetRoutes ) );
1439
1440                 $template->set( 'header', '' );
1441                 $template->set( 'formheader', '' );
1442                 $template->set( 'skin', $this->getSkin() );
1443                 $template->set( 'name', $this->mUsername );
1444                 $template->set( 'password', $this->mPassword );
1445                 $template->set( 'retype', $this->mRetype );
1446                 $template->set( 'createemailset', $this->mCreateaccountMail );
1447                 $template->set( 'email', $this->mEmail );
1448                 $template->set( 'realname', $this->mRealName );
1449                 $template->set( 'domain', $this->mDomain );
1450                 $template->set( 'reason', $this->mReason );
1451
1452                 $template->set( 'action', $titleObj->getLocalURL( $q ) );
1453                 $template->set( 'message', $msg );
1454                 $template->set( 'messagetype', $msgtype );
1455                 $template->set( 'createemail', $wgEnableEmail && $user->isLoggedIn() );
1456                 $template->set( 'userealname', !in_array( 'realname', $wgHiddenPrefs ) );
1457                 $template->set( 'useemail', $wgEnableEmail );
1458                 $template->set( 'emailrequired', $wgEmailConfirmToEdit );
1459                 $template->set( 'emailothers', $wgEnableUserEmail );
1460                 $template->set( 'canreset', $wgAuth->allowPasswordChange() );
1461                 $template->set( 'resetlink', $resetLink );
1462                 $template->set( 'canremember', $wgExtendedLoginCookieExpiration === null ? ( $wgCookieExpiration > 0 ) : ( $wgExtendedLoginCookieExpiration > 0 ) );
1463                 $template->set( 'usereason', $user->isLoggedIn() );
1464                 $template->set( 'remember', $this->mRemember );
1465                 $template->set( 'cansecurelogin', ( $wgSecureLogin === true ) );
1466                 $template->set( 'stickhttps', (int)$this->mStickHTTPS );
1467                 $template->set( 'loggedin', $user->isLoggedIn() );
1468                 $template->set( 'loggedinuser', $user->getName() );
1469
1470                 if ( $this->mType == 'signup' ) {
1471                         if ( !self::getCreateaccountToken() ) {
1472                                 self::setCreateaccountToken();
1473                         }
1474                         $template->set( 'token', self::getCreateaccountToken() );
1475                 } else {
1476                         if ( !self::getLoginToken() ) {
1477                                 self::setLoginToken();
1478                         }
1479                         $template->set( 'token', self::getLoginToken() );
1480                 }
1481
1482                 # Prepare language selection links as needed
1483                 if ( $wgLoginLanguageSelector ) {
1484                         $template->set( 'languages', $this->makeLanguageSelector() );
1485                         if ( $this->mLanguage ) {
1486                                 $template->set( 'uselang', $this->mLanguage );
1487                         }
1488                 }
1489
1490                 $template->set( 'secureLoginUrl', $this->mSecureLoginUrl );
1491                 // Use signupend-https for HTTPS requests if it's not blank, signupend otherwise
1492                 $usingHTTPS = $this->mRequest->getProtocol() == 'https';
1493                 $signupendHTTPS = $this->msg( 'signupend-https' );
1494                 if ( $usingHTTPS && !$signupendHTTPS->isBlank() ) {
1495                         $template->set( 'signupend', $signupendHTTPS->parse() );
1496                 } else {
1497                         $template->set( 'signupend', $this->msg( 'signupend' )->parse() );
1498                 }
1499
1500                 // If using HTTPS coming from HTTP, then the 'fromhttp' parameter must be preserved
1501                 if ( $usingHTTPS ) {
1502                         $template->set( 'fromhttp', $this->mFromHTTP );
1503                 }
1504
1505                 // Give authentication and captcha plugins a chance to modify the form
1506                 $wgAuth->modifyUITemplate( $template, $this->mType );
1507                 if ( $this->mType == 'signup' ) {
1508                         Hooks::run( 'UserCreateForm', array( &$template ) );
1509                 } else {
1510                         Hooks::run( 'UserLoginForm', array( &$template ) );
1511                 }
1512
1513                 $out->disallowUserJs(); // just in case...
1514                 $out->addTemplate( $template );
1515         }
1516
1517         /**
1518          * Whether the login/create account form should display a link to the
1519          * other form (in addition to whatever the skin provides).
1520          *
1521          * @param User $user
1522          * @return bool
1523          */
1524         private function showCreateOrLoginLink( &$user ) {
1525                 if ( $this->mType == 'signup' ) {
1526                         return true;
1527                 } elseif ( $user->isAllowed( 'createaccount' ) ) {
1528                         return true;
1529                 } else {
1530                         return false;
1531                 }
1532         }
1533
1534         /**
1535          * Check if a session cookie is present.
1536          *
1537          * This will not pick up a cookie set during _this_ request, but is meant
1538          * to ensure that the client is returning the cookie which was set on a
1539          * previous pass through the system.
1540          *
1541          * @private
1542          * @return bool
1543          */
1544         function hasSessionCookie() {
1545                 global $wgDisableCookieCheck;
1546
1547                 return $wgDisableCookieCheck ? true : $this->getRequest()->checkSessionCookie();
1548         }
1549
1550         /**
1551          * Get the login token from the current session
1552          * @return mixed
1553          */
1554         public static function getLoginToken() {
1555                 global $wgRequest;
1556
1557                 return $wgRequest->getSessionData( 'wsLoginToken' );
1558         }
1559
1560         /**
1561          * Randomly generate a new login token and attach it to the current session
1562          */
1563         public static function setLoginToken() {
1564                 global $wgRequest;
1565                 // Generate a token directly instead of using $user->getEditToken()
1566                 // because the latter reuses $_SESSION['wsEditToken']
1567                 $wgRequest->setSessionData( 'wsLoginToken', MWCryptRand::generateHex( 32 ) );
1568         }
1569
1570         /**
1571          * Remove any login token attached to the current session
1572          */
1573         public static function clearLoginToken() {
1574                 global $wgRequest;
1575                 $wgRequest->setSessionData( 'wsLoginToken', null );
1576         }
1577
1578         /**
1579          * Get the createaccount token from the current session
1580          * @return mixed
1581          */
1582         public static function getCreateaccountToken() {
1583                 global $wgRequest;
1584                 return $wgRequest->getSessionData( 'wsCreateaccountToken' );
1585         }
1586
1587         /**
1588          * Randomly generate a new createaccount token and attach it to the current session
1589          */
1590         public static function setCreateaccountToken() {
1591                 global $wgRequest;
1592                 $wgRequest->setSessionData( 'wsCreateaccountToken', MWCryptRand::generateHex( 32 ) );
1593         }
1594
1595         /**
1596          * Remove any createaccount token attached to the current session
1597          */
1598         public static function clearCreateaccountToken() {
1599                 global $wgRequest;
1600                 $wgRequest->setSessionData( 'wsCreateaccountToken', null );
1601         }
1602
1603         /**
1604          * Renew the user's session id, using strong entropy
1605          */
1606         private function renewSessionId() {
1607                 global $wgSecureLogin, $wgCookieSecure;
1608                 if ( $wgSecureLogin && !$this->mStickHTTPS ) {
1609                         $wgCookieSecure = false;
1610                 }
1611
1612                 wfResetSessionID();
1613         }
1614
1615         /**
1616          * @param string $type
1617          * @private
1618          */
1619         function cookieRedirectCheck( $type ) {
1620                 $titleObj = SpecialPage::getTitleFor( 'Userlogin' );
1621                 $query = array( 'wpCookieCheck' => $type );
1622                 if ( $this->mReturnTo !== '' ) {
1623                         $query['returnto'] = $this->mReturnTo;
1624                         $query['returntoquery'] = $this->mReturnToQuery;
1625                 }
1626                 $check = $titleObj->getFullURL( $query );
1627
1628                 $this->getOutput()->redirect( $check );
1629         }
1630
1631         /**
1632          * @param string $type
1633          * @private
1634          */
1635         function onCookieRedirectCheck( $type ) {
1636                 if ( !$this->hasSessionCookie() ) {
1637                         if ( $type == 'new' ) {
1638                                 $this->mainLoginForm( $this->msg( 'nocookiesnew' )->parse() );
1639                         } elseif ( $type == 'login' ) {
1640                                 $this->mainLoginForm( $this->msg( 'nocookieslogin' )->parse() );
1641                         } else {
1642                                 # shouldn't happen
1643                                 $this->mainLoginForm( $this->msg( 'error' )->text() );
1644                         }
1645                 } else {
1646                         $this->successfulLogin();
1647                 }
1648         }
1649
1650         /**
1651          * Produce a bar of links which allow the user to select another language
1652          * during login/registration but retain "returnto"
1653          *
1654          * @return string
1655          */
1656         function makeLanguageSelector() {
1657                 $msg = $this->msg( 'loginlanguagelinks' )->inContentLanguage();
1658                 if ( $msg->isBlank() ) {
1659                         return '';
1660                 }
1661                 $langs = explode( "\n", $msg->text() );
1662                 $links = array();
1663                 foreach ( $langs as $lang ) {
1664                         $lang = trim( $lang, '* ' );
1665                         $parts = explode( '|', $lang );
1666                         if ( count( $parts ) >= 2 ) {
1667                                 $links[] = $this->makeLanguageSelectorLink( $parts[0], trim( $parts[1] ) );
1668                         }
1669                 }
1670
1671                 return count( $links ) > 0 ? $this->msg( 'loginlanguagelabel' )->rawParams(
1672                         $this->getLanguage()->pipeList( $links ) )->escaped() : '';
1673         }
1674
1675         /**
1676          * Create a language selector link for a particular language
1677          * Links back to this page preserving type and returnto
1678          *
1679          * @param string $text Link text
1680          * @param string $lang Language code
1681          * @return string
1682          */
1683         function makeLanguageSelectorLink( $text, $lang ) {
1684                 if ( $this->getLanguage()->getCode() == $lang ) {
1685                         // no link for currently used language
1686                         return htmlspecialchars( $text );
1687                 }
1688                 $query = array( 'uselang' => $lang );
1689                 if ( $this->mType == 'signup' ) {
1690                         $query['type'] = 'signup';
1691                 }
1692                 if ( $this->mReturnTo !== '' ) {
1693                         $query['returnto'] = $this->mReturnTo;
1694                         $query['returntoquery'] = $this->mReturnToQuery;
1695                 }
1696
1697                 $attr = array();
1698                 $targetLanguage = Language::factory( $lang );
1699                 $attr['lang'] = $attr['hreflang'] = $targetLanguage->getHtmlCode();
1700
1701                 return Linker::linkKnown(
1702                         $this->getPageTitle(),
1703                         htmlspecialchars( $text ),
1704                         $attr,
1705                         $query
1706                 );
1707         }
1708
1709         protected function getGroupName() {
1710                 return 'login';
1711         }
1712 }