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         /**
  48          * Valid error and warning messages
  49          *
  50          * Special:Userlogin can show an error or warning message on the form when
  51          * coming from another page. This is done via the ?error= or ?warning= GET
  52          * parameters.
  53          *
  54          * This array is the list of valid message keys. All other values will be
  55          * ignored.
  56          *
  57          * @since 1.24
  58          * @var string[]
  59          */
  60         public static $validErrorMessages = array(
  61                 'exception-nologin-text',
  62                 'watchlistanontext',
  63                 'changeemail-no-info',
  64                 'resetpass-no-info',
  65                 'confirmemail_needlogin',
  66                 'prefsnologintext2',
  67         );
  68
  69         public $mAbortLoginErrorMsg = null;
  70
  71         protected $mUsername;
  72         protected $mPassword;
  73         protected $mRetype;
  74         protected $mReturnTo;
  75         protected $mCookieCheck;
  76         protected $mPosted;
  77         protected $mAction;
  78         protected $mCreateaccount;
  79         protected $mCreateaccountMail;
  80         protected $mLoginattempt;
  81         protected $mRemember;
  82         protected $mEmail;
  83         protected $mDomain;
  84         protected $mLanguage;
  85         protected $mSkipCookieCheck;
  86         protected $mReturnToQuery;
  87         protected $mToken;
  88         protected $mStickHTTPS;
  89         protected $mType;
  90         protected $mReason;
  91         protected $mRealName;
  92         protected $mEntryError = '';
  93         protected $mEntryErrorType = 'error';
  94
  95         private $mTempPasswordUsed;
  96         private $mLoaded = false;
  97         private $mSecureLoginUrl;
  98
  99         /** @var WebRequest */
 100         private $mOverrideRequest = null;
 101
 102         /** @var WebRequest Effective request; set at the beginning of load */
 103         private $mRequest = null;
 104
 105         /**
 106          * @param WebRequest $request
 107          */
 108         public function __construct( $request = null ) {
 109                 global $wgUseMediaWikiUIEverywhere;
 110                 parent::__construct( 'Userlogin' );
 111
 112                 $this->mOverrideRequest = $request;
 113                 // Override UseMediaWikiEverywhere to true, to force login and create form to use mw ui
 114                 $wgUseMediaWikiUIEverywhere = true;
 115         }
 116
 117         /**
 118          * Returns an array of all valid error messages.
 119          *
 120          * @return array
 121          */
 122         public static function getValidErrorMessages() {
 123                 static $messages = null;
 124                 if ( !$messages ) {
 125                         $messages = self::$validErrorMessages;
 126                         Hooks::run( 'LoginFormValidErrorMessages', array( &$messages ) );
 127                 }
 128
 129                 return $messages;
 130         }
 131
 132         /**
 133          * Loader
 134          */
 135         function load() {
 136                 global $wgAuth, $wgHiddenPrefs, $wgEnableEmail;
 137
 138                 if ( $this->mLoaded ) {
 139                         return;
 140                 }
 141                 $this->mLoaded = true;
 142
 143                 if ( $this->mOverrideRequest === null ) {
 144                         $request = $this->getRequest();
 145                 } else {
 146                         $request = $this->mOverrideRequest;
 147                 }
 148                 $this->mRequest = $request;
 149
 150                 $this->mType = $request->getText( 'type' );
 151                 $this->mUsername = $request->getText( 'wpName' );
 152                 $this->mPassword = $request->getText( 'wpPassword' );
 153                 $this->mRetype = $request->getText( 'wpRetype' );
 154                 $this->mDomain = $request->getText( 'wpDomain' );
 155                 $this->mReason = $request->getText( 'wpReason' );
 156                 $this->mCookieCheck = $request->getVal( 'wpCookieCheck' );
 157                 $this->mPosted = $request->wasPosted();
 158                 $this->mCreateaccountMail = $request->getCheck( 'wpCreateaccountMail' )
 159                         && $wgEnableEmail;
 160                 $this->mCreateaccount = $request->getCheck( 'wpCreateaccount' ) && !$this->mCreateaccountMail;
 161                 $this->mLoginattempt = $request->getCheck( 'wpLoginattempt' );
 162                 $this->mAction = $request->getVal( 'action' );
 163                 $this->mRemember = $request->getCheck( 'wpRemember' );
 164                 $this->mFromHTTP = $request->getBool( 'fromhttp', false )
 165                         || $request->getBool( 'wpFromhttp', false );
 166                 $this->mStickHTTPS = ( !$this->mFromHTTP && $request->getProtocol() === 'https' )
 167                         || $request->getBool( 'wpForceHttps', false );
 168                 $this->mLanguage = $request->getText( 'uselang' );
 169                 $this->mSkipCookieCheck = $request->getCheck( 'wpSkipCookieCheck' );
 170                 $this->mToken = $this->mType == 'signup'
 171                         ? $request->getVal( 'wpCreateaccountToken' )
 172                         : $request->getVal( 'wpLoginToken' );
 173                 $this->mReturnTo = $request->getVal( 'returnto', '' );
 174                 $this->mReturnToQuery = $request->getVal( 'returntoquery', '' );
 175
 176                 // Show an error or warning passed on from a previous page
 177                 $entryError = $this->msg( $request->getVal( 'error', '' ) );
 178                 $entryWarning = $this->msg( $request->getVal( 'warning', '' ) );
 179                 // bc: provide login link as a parameter for messages where the translation
 180                 // was not updated
 181                 $loginreqlink = Linker::linkKnown(
 182                         $this->getPageTitle(),
 183                         $this->msg( 'loginreqlink' )->escaped(),
 184                         array(),
 185                         array(
 186                                 'returnto' => $this->mReturnTo,
 187                                 'returntoquery' => $this->mReturnToQuery,
 188                                 'uselang' => $this->mLanguage,
 189                                 'fromhttp' => $this->mFromHTTP ? '1' : '0',
 190                         )
 191                 );
 192
 193                 // Only show valid error or warning messages.
 194                 if ( $entryError->exists()
 195                         && in_array( $entryError->getKey(), self::getValidErrorMessages() )
 196                 ) {
 197                         $this->mEntryErrorType = 'error';
 198                         $this->mEntryError = $entryError->rawParams( $loginreqlink )->parse();
 199
 200                 } elseif ( $entryWarning->exists()
 201                         && in_array( $entryWarning->getKey(), self::getValidErrorMessages() )
 202                 ) {
 203                         $this->mEntryErrorType = 'warning';
 204                         $this->mEntryError = $entryWarning->rawParams( $loginreqlink )->parse();
 205                 }
 206
 207                 if ( $wgEnableEmail ) {
 208                         $this->mEmail = $request->getText( 'wpEmail' );
 209                 } else {
 210                         $this->mEmail = '';
 211                 }
 212                 if ( !in_array( 'realname', $wgHiddenPrefs ) ) {
 213                         $this->mRealName = $request->getText( 'wpRealName' );
 214                 } else {
 215                         $this->mRealName = '';
 216                 }
 217
 218                 if ( !$wgAuth->validDomain( $this->mDomain ) ) {
 219                         $this->mDomain = $wgAuth->getDomain();
 220                 }
 221                 $wgAuth->setDomain( $this->mDomain );
 222
 223                 # 1. When switching accounts, it sucks to get automatically logged out
 224                 # 2. Do not return to PasswordReset after a successful password change
 225                 #    but goto Wiki start page (Main_Page) instead ( bug 33997 )
 226                 $returnToTitle = Title::newFromText( $this->mReturnTo );
 227                 if ( is_object( $returnToTitle )
 228                         && ( $returnToTitle->isSpecial( 'Userlogout' )
 229                                 || $returnToTitle->isSpecial( 'PasswordReset' ) )
 230                 ) {
 231                         $this->mReturnTo = '';
 232                         $this->mReturnToQuery = '';
 233                 }
 234         }
 235
 236         function getDescription() {
 237                 if ( $this->mType === 'signup' ) {
 238                         return $this->msg( 'createaccount' )->text();
 239                 } else {
 240                         return $this->msg( 'login' )->text();
 241                 }
 242         }
 243
 244         /**
 245          * @param string|null $subPage
 246          */
 247         public function execute( $subPage ) {
 248                 if ( session_id() == '' ) {
 249                         wfSetupSession();
 250                 }
 251
 252                 $this->load();
 253
 254                 // Check for [[Special:Userlogin/signup]]. This affects form display and
 255                 // page title.
 256                 if ( $subPage == 'signup' ) {
 257                         $this->mType = 'signup';
 258                 }
 259                 $this->setHeaders();
 260
 261                 // In the case where the user is already logged in, and was redirected to the login form from a
 262                 // page that requires login, do not show the login page. The use case scenario for this is when
 263                 // a user opens a large number of tabs, is redirected to the login page on all of them, and then
 264                 // logs in on one, expecting all the others to work properly.
 265                 //
 266                 // However, do show the form if it was visited intentionally (no 'returnto' is present). People
 267                 // who often switch between several accounts have grown accustomed to this behavior.
 268                 if (
 269                         $this->mType !== 'signup' &&
 270                         !$this->mPosted &&
 271                         $this->getUser()->isLoggedIn() &&
 272                         ( $this->mReturnTo !== '' || $this->mReturnToQuery !== '' )
 273                 ) {
 274                         $this->successfulLogin();
 275                 }
 276
 277                 // If logging in and not on HTTPS, either redirect to it or offer a link.
 278                 global $wgSecureLogin;
 279                 if ( $this->mRequest->getProtocol() !== 'https' ) {
 280                         $title = $this->getFullTitle();
 281                         $query = array(
 282                                 'returnto' => $this->mReturnTo !== '' ? $this->mReturnTo : null,
 283                                 'returntoquery' => $this->mReturnToQuery !== '' ?
 284                                         $this->mReturnToQuery : null,
 285                                 'title' => null,
 286                                 ( $this->mEntryErrorType === 'error' ? 'error' : 'warning' ) => $this->mEntryError,
 287                         ) + $this->mRequest->getQueryValues();
 288                         $url = $title->getFullURL( $query, false, PROTO_HTTPS );
 289                         if ( $wgSecureLogin
 290                                 && wfCanIPUseHTTPS( $this->getRequest()->getIP() )
 291                                 && !$this->mFromHTTP ) // Avoid infinite redirect
 292                         {
 293                                 $url = wfAppendQuery( $url, 'fromhttp=1' );
 294                                 $this->getOutput()->redirect( $url );
 295                                 // Since we only do this redir to change proto, always vary
 296                                 $this->getOutput()->addVaryHeader( 'X-Forwarded-Proto' );
 297
 298                                 return;
 299                         } else {
 300                                 // A wiki without HTTPS login support should set $wgServer to
 301                                 // http://somehost, in which case the secure URL generated
 302                                 // above won't actually start with https://
 303                                 if ( substr( $url, 0, 8 ) === 'https://' ) {
 304                                         $this->mSecureLoginUrl = $url;
 305                                 }
 306                         }
 307                 }
 308
 309                 if ( !is_null( $this->mCookieCheck ) ) {
 310                         $this->onCookieRedirectCheck( $this->mCookieCheck );
 311
 312                         return;
 313                 } elseif ( $this->mPosted ) {
 314                         if ( $this->mCreateaccount ) {
 315                                 $this->addNewAccount();
 316
 317                                 return;
 318                         } elseif ( $this->mCreateaccountMail ) {
 319                                 $this->addNewAccountMailPassword();
 320
 321                                 return;
 322                         } elseif ( ( 'submitlogin' == $this->mAction ) || $this->mLoginattempt ) {
 323                                 $this->processLogin();
 324
 325                                 return;
 326                         }
 327                 }
 328                 $this->mainLoginForm( $this->mEntryError, $this->mEntryErrorType );
 329         }
 330
 331         /**
 332          * @private
 333          */
 334         function addNewAccountMailPassword() {
 335                 if ( $this->mEmail == '' ) {
 336                         $this->mainLoginForm( $this->msg( 'noemailcreate' )->escaped() );
 337
 338                         return;
 339                 }
 340
 341                 $status = $this->addNewAccountInternal();
 342                 LoggerFactory::getInstance( 'authmanager' )->info( 'Account creation attempt with mailed password', array(
 343                         'event' => 'accountcreation',
 344                         'status' => $status,
 345                 ) );
 346                 if ( !$status->isGood() ) {
 347                         $error = $status->getMessage();
 348                         $this->mainLoginForm( $error->toString() );
 349
 350                         return;
 351                 }
 352
 353                 $u = $status->getValue();
 354
 355                 // Wipe the initial password and mail a temporary one
 356                 $u->setPassword( null );
 357                 $u->saveSettings();
 358                 $result = $this->mailPasswordInternal( $u, false, 'createaccount-title', 'createaccount-text' );
 359
 360                 Hooks::run( 'AddNewAccount', array( $u, true ) );
 361                 $u->addNewUserLogEntry( 'byemail', $this->mReason );
 362
 363                 $out = $this->getOutput();
 364                 $out->setPageTitle( $this->msg( 'accmailtitle' ) );
 365
 366                 if ( !$result->isGood() ) {
 367                         $this->mainLoginForm( $this->msg( 'mailerror', $result->getWikiText() )->text() );
 368                 } else {
 369                         $out->addWikiMsg( 'accmailtext', $u->getName(), $u->getEmail() );
 370                         $this->executeReturnTo( 'success' );
 371                 }
 372         }
 373
 374         /**
 375          * @private
 376          * @return bool
 377          */
 378         function addNewAccount() {
 379                 global $wgContLang, $wgUser, $wgEmailAuthentication, $wgLoginLanguageSelector;
 380
 381                 # Create the account and abort if there's a problem doing so
 382                 $status = $this->addNewAccountInternal();
 383                 LoggerFactory::getInstance( 'authmanager' )->info( 'Account creation attempt', array(
 384                         'event' => 'accountcreation',
 385                         'status' => $status,
 386                 ) );
 387
 388                 if ( !$status->isGood() ) {
 389                         $error = $status->getMessage();
 390                         $this->mainLoginForm( $error->toString() );
 391
 392                         return false;
 393                 }
 394
 395                 $u = $status->getValue();
 396
 397                 # Only save preferences if the user is not creating an account for someone else.
 398                 if ( $this->getUser()->isAnon() ) {
 399                         # If we showed up language selection links, and one was in use, be
 400                         # smart (and sensible) and save that language as the user's preference
 401                         if ( $wgLoginLanguageSelector && $this->mLanguage ) {
 402                                 $u->setOption( 'language', $this->mLanguage );
 403                         } else {
 404
 405                                 # Otherwise the user's language preference defaults to $wgContLang,
 406                                 # but it may be better to set it to their preferred $wgContLang variant,
 407                                 # based on browser preferences or URL parameters.
 408                                 $u->setOption( 'language', $wgContLang->getPreferredVariant() );
 409                         }
 410                         if ( $wgContLang->hasVariants() ) {
 411                                 $u->setOption( 'variant', $wgContLang->getPreferredVariant() );
 412                         }
 413                 }
 414
 415                 $out = $this->getOutput();
 416
 417                 # Send out an email authentication message if needed
 418                 if ( $wgEmailAuthentication && Sanitizer::validateEmail( $u->getEmail() ) ) {
 419                         $status = $u->sendConfirmationMail();
 420                         if ( $status->isGood() ) {
 421                                 $out->addWikiMsg( 'confirmemail_oncreate' );
 422                         } else {
 423                                 $out->addWikiText( $status->getWikiText( 'confirmemail_sendfailed' ) );
 424                         }
 425                 }
 426
 427                 # Save settings (including confirmation token)
 428                 $u->saveSettings();
 429
 430                 # If not logged in, assume the new account as the current one and set
 431                 # session cookies then show a "welcome" message or a "need cookies"
 432                 # message as needed
 433                 if ( $this->getUser()->isAnon() ) {
 434                         $u->setCookies();
 435                         $wgUser = $u;
 436                         // This should set it for OutputPage and the Skin
 437                         // which is needed or the personal links will be
 438                         // wrong.
 439                         $this->getContext()->setUser( $u );
 440                         Hooks::run( 'AddNewAccount', array( $u, false ) );
 441                         $u->addNewUserLogEntry( 'create' );
 442                         if ( $this->hasSessionCookie() ) {
 443                                 $this->successfulCreation();
 444                         } else {
 445                                 $this->cookieRedirectCheck( 'new' );
 446                         }
 447                 } else {
 448                         # Confirm that the account was created
 449                         $out->setPageTitle( $this->msg( 'accountcreated' ) );
 450                         $out->addWikiMsg( 'accountcreatedtext', $u->getName() );
 451                         $out->addReturnTo( $this->getPageTitle() );
 452                         Hooks::run( 'AddNewAccount', array( $u, false ) );
 453                         $u->addNewUserLogEntry( 'create2', $this->mReason );
 454                 }
 455
 456                 return true;
 457         }
 458
 459         /**
 460          * Make a new user account using the loaded data.
 461          * @private
 462          * @throws PermissionsError|ReadOnlyError
 463          * @return Status
 464          */
 465         public function addNewAccountInternal() {
 466                 global $wgAuth, $wgMemc, $wgAccountCreationThrottle, $wgEmailConfirmToEdit;
 467
 468                 // If the user passes an invalid domain, something is fishy
 469                 if ( !$wgAuth->validDomain( $this->mDomain ) ) {
 470                         return Status::newFatal( 'wrongpassword' );
 471                 }
 472
 473                 // If we are not allowing users to login locally, we should be checking
 474                 // to see if the user is actually able to authenticate to the authenti-
 475                 // cation server before they create an account (otherwise, they can
 476                 // create a local account and login as any domain user). We only need
 477                 // to check this for domains that aren't local.
 478                 if ( 'local' != $this->mDomain && $this->mDomain != '' ) {
 479                         if (
 480                                 !$wgAuth->canCreateAccounts() &&
 481                                 (
 482                                         !$wgAuth->userExists( $this->mUsername ) ||
 483                                         !$wgAuth->authenticate( $this->mUsername, $this->mPassword )
 484                                 )
 485                         ) {
 486                                 return Status::newFatal( 'wrongpassword' );
 487                         }
 488                 }
 489
 490                 if ( wfReadOnly() ) {
 491                         throw new ReadOnlyError;
 492                 }
 493
 494                 # Request forgery checks.
 495                 if ( !self::getCreateaccountToken() ) {
 496                         self::setCreateaccountToken();
 497
 498                         return Status::newFatal( 'nocookiesfornew' );
 499                 }
 500
 501                 # The user didn't pass a createaccount token
 502                 if ( !$this->mToken ) {
 503                         return Status::newFatal( 'sessionfailure' );
 504                 }
 505
 506                 # Validate the createaccount token
 507                 if ( $this->mToken !== self::getCreateaccountToken() ) {
 508                         return Status::newFatal( 'sessionfailure' );
 509                 }
 510
 511                 # Check permissions
 512                 $currentUser = $this->getUser();
 513                 $creationBlock = $currentUser->isBlockedFromCreateAccount();
 514                 if ( !$currentUser->isAllowed( 'createaccount' ) ) {
 515                         throw new PermissionsError( 'createaccount' );
 516                 } elseif ( $creationBlock instanceof Block ) {
 517                         // Throws an ErrorPageError.
 518                         $this->userBlockedMessage( $creationBlock );
 519
 520                         // This should never be reached.
 521                         return false;
 522                 }
 523
 524                 # Include checks that will include GlobalBlocking (Bug 38333)
 525                 $permErrors = $this->getPageTitle()->getUserPermissionsErrors(
 526                         'createaccount',
 527                         $currentUser,
 528                         true
 529                 );
 530
 531                 if ( count( $permErrors ) ) {
 532                         throw new PermissionsError( 'createaccount', $permErrors );
 533                 }
 534
 535                 $ip = $this->getRequest()->getIP();
 536                 if ( $currentUser->isDnsBlacklisted( $ip, true /* check $wgProxyWhitelist */ ) ) {
 537                         return Status::newFatal( 'sorbs_create_account_reason' );
 538                 }
 539
 540                 # Now create a dummy user ($u) and check if it is valid
 541                 $u = User::newFromName( $this->mUsername, 'creatable' );
 542                 if ( !$u ) {
 543                         return Status::newFatal( 'noname' );
 544                 } elseif ( 0 != $u->idForName( User::READ_LOCKING ) ) {
 545                         return Status::newFatal( 'userexists' );
 546                 }
 547
 548                 if ( $this->mCreateaccountMail ) {
 549                         # do not force a password for account creation by email
 550                         # set invalid password, it will be replaced later by a random generated password
 551                         $this->mPassword = null;
 552                 } else {
 553                         if ( $this->mPassword !== $this->mRetype ) {
 554                                 return Status::newFatal( 'badretype' );
 555                         }
 556
 557                         # check for password validity, return a fatal Status if invalid
 558                         $validity = $u->checkPasswordValidity( $this->mPassword, 'create' );
 559                         if ( !$validity->isGood() ) {
 560                                 $validity->ok = false; // make sure this Status is fatal
 561                                 return $validity;
 562                         }
 563                 }
 564
 565                 # if you need a confirmed email address to edit, then obviously you
 566                 # need an email address.
 567                 if ( $wgEmailConfirmToEdit && strval( $this->mEmail ) === '' ) {
 568                         return Status::newFatal( 'noemailtitle' );
 569                 }
 570
 571                 if ( strval( $this->mEmail ) !== '' && !Sanitizer::validateEmail( $this->mEmail ) ) {
 572                         return Status::newFatal( 'invalidemailaddress' );
 573                 }
 574
 575                 # Set some additional data so the AbortNewAccount hook can be used for
 576                 # more than just username validation
 577                 $u->setEmail( $this->mEmail );
 578                 $u->setRealName( $this->mRealName );
 579
 580                 $abortError = '';
 581                 $abortStatus = null;
 582                 if ( !Hooks::run( 'AbortNewAccount', array( $u, &$abortError, &$abortStatus ) ) ) {
 583                         // Hook point to add extra creation throttles and blocks
 584                         wfDebug( "LoginForm::addNewAccountInternal: a hook blocked creation\n" );
 585                         if ( $abortStatus === null ) {
 586                                 // Report back the old string as a raw message status.
 587                                 // This will report the error back as 'createaccount-hook-aborted'
 588                                 // with the given string as the message.
 589                                 // To return a different error code, return a Status object.
 590                                 $abortError = new Message( 'createaccount-hook-aborted', array( $abortError ) );
 591                                 $abortError->text();
 592
 593                                 return Status::newFatal( $abortError );
 594                         } else {
 595                                 // For MediaWiki 1.23+ and updated hooks, return the Status object
 596                                 // returned from the hook.
 597                                 return $abortStatus;
 598                         }
 599                 }
 600
 601                 // Hook point to check for exempt from account creation throttle
 602                 if ( !Hooks::run( 'ExemptFromAccountCreationThrottle', array( $ip ) ) ) {
 603                         wfDebug( "LoginForm::exemptFromAccountCreationThrottle: a hook " .
 604                                 "allowed account creation w/o throttle\n" );
 605                 } else {
 606                         if ( ( $wgAccountCreationThrottle && $currentUser->isPingLimitable() ) ) {
 607                                 $key = wfMemcKey( 'acctcreate', 'ip', $ip );
 608                                 $value = $wgMemc->get( $key );
 609                                 if ( !$value ) {
 610                                         $wgMemc->set( $key, 0, 86400 );
 611                                 }
 612                                 if ( $value >= $wgAccountCreationThrottle ) {
 613                                         return Status::newFatal( 'acct_creation_throttle_hit', $wgAccountCreationThrottle );
 614                                 }
 615                                 $wgMemc->incr( $key );
 616                         }
 617                 }
 618
 619                 if ( !$wgAuth->addUser( $u, $this->mPassword, $this->mEmail, $this->mRealName ) ) {
 620                         return Status::newFatal( 'externaldberror' );
 621                 }
 622
 623                 self::clearCreateaccountToken();
 624
 625                 return $this->initUser( $u, false );
 626         }
 627
 628         /**
 629          * Actually add a user to the database.
 630          * Give it a User object that has been initialised with a name.
 631          *
 632          * @param User $u
 633          * @param bool $autocreate True if this is an autocreation via auth plugin
 634          * @return Status Status object, with the User object in the value member on success
 635          * @private
 636          */
 637         function initUser( $u, $autocreate ) {
 638                 global $wgAuth;
 639
 640                 $status = $u->addToDatabase();
 641                 if ( !$status->isOK() ) {
 642                         return $status;
 643                 }
 644
 645                 if ( $wgAuth->allowPasswordChange() ) {
 646                         $u->setPassword( $this->mPassword );
 647                 }
 648
 649                 $u->setEmail( $this->mEmail );
 650                 $u->setRealName( $this->mRealName );
 651                 $u->setToken();
 652
 653                 $wgAuth->initUser( $u, $autocreate );
 654
 655                 $u->saveSettings();
 656
 657                 // Update user count
 658                 DeferredUpdates::addUpdate( new SiteStatsUpdate( 0, 0, 0, 0, 1 ) );
 659
 660                 // Watch user's userpage and talk page
 661                 $u->addWatch( $u->getUserPage(), WatchedItem::IGNORE_USER_RIGHTS );
 662
 663                 return Status::newGood( $u );
 664         }
 665
 666         /**
 667          * Internally authenticate the login request.
 668          *
 669          * This may create a local account as a side effect if the
 670          * authentication plugin allows transparent local account
 671          * creation.
 672          * @return int
 673          */
 674         public function authenticateUserData() {
 675                 global $wgUser, $wgAuth;
 676
 677                 $this->load();
 678
 679                 if ( $this->mUsername == '' ) {
 680                         return self::NO_NAME;
 681                 }
 682
 683                 // We require a login token to prevent login CSRF
 684                 // Handle part of this before incrementing the throttle so
 685                 // token-less login attempts don't count towards the throttle
 686                 // but wrong-token attempts do.
 687
 688                 // If the user doesn't have a login token yet, set one.
 689                 if ( !self::getLoginToken() ) {
 690                         self::setLoginToken();
 691
 692                         return self::NEED_TOKEN;
 693                 }
 694                 // If the user didn't pass a login token, tell them we need one
 695                 if ( !$this->mToken ) {
 696                         return self::NEED_TOKEN;
 697                 }
 698
 699                 $throttleCount = self::incLoginThrottle( $this->mUsername );
 700                 if ( $throttleCount === true ) {
 701                         return self::THROTTLED;
 702                 }
 703
 704                 // Validate the login token
 705                 if ( $this->mToken !== self::getLoginToken() ) {
 706                         return self::WRONG_TOKEN;
 707                 }
 708
 709                 // Load the current user now, and check to see if we're logging in as
 710                 // the same name. This is necessary because loading the current user
 711                 // (say by calling getName()) calls the UserLoadFromSession hook, which
 712                 // potentially creates the user in the database. Until we load $wgUser,
 713                 // checking for user existence using User::newFromName($name)->getId() below
 714                 // will effectively be using stale data.
 715                 if ( $this->getUser()->getName() === $this->mUsername ) {
 716                         wfDebug( __METHOD__ . ": already logged in as {$this->mUsername}\n" );
 717
 718                         return self::SUCCESS;
 719                 }
 720
 721                 $u = User::newFromName( $this->mUsername );
 722                 if ( $u === false ) {
 723                         return self::ILLEGAL;
 724                 }
 725
 726                 $msg = null;
 727                 // Give extensions a way to indicate the username has been updated,
 728                 // rather than telling the user the account doesn't exist.
 729                 if ( !Hooks::run( 'LoginUserMigrated', array( $u, &$msg ) ) ) {
 730                         $this->mAbortLoginErrorMsg = $msg;
 731                         return self::USER_MIGRATED;
 732                 }
 733
 734                 if ( !User::isUsableName( $u->getName() ) ) {
 735                         return self::ILLEGAL;
 736                 }
 737
 738                 $isAutoCreated = false;
 739                 if ( $u->getID() == 0 ) {
 740                         $status = $this->attemptAutoCreate( $u );
 741                         if ( $status !== self::SUCCESS ) {
 742                                 return $status;
 743                         } else {
 744                                 $isAutoCreated = true;
 745                         }
 746                 } else {
 747                         $u->load();
 748                 }
 749
 750                 // Give general extensions, such as a captcha, a chance to abort logins
 751                 $abort = self::ABORTED;
 752                 if ( !Hooks::run( 'AbortLogin', array( $u, $this->mPassword, &$abort, &$msg ) ) ) {
 753                         $this->mAbortLoginErrorMsg = $msg;
 754
 755                         return $abort;
 756                 }
 757
 758                 global $wgBlockDisablesLogin;
 759                 if ( !$u->checkPassword( $this->mPassword ) ) {
 760                         if ( $u->checkTemporaryPassword( $this->mPassword ) ) {
 761                                 // The e-mailed temporary password should not be used for actu-
 762                                 // al logins; that's a very sloppy habit, and insecure if an
 763                                 // attacker has a few seconds to click "search" on someone's o-
 764                                 // pen mail reader.
 765                                 //
 766                                 // Allow it to be used only to reset the password a single time
 767                                 // to a new value, which won't be in the user's e-mail ar-
 768                                 // chives.
 769                                 //
 770                                 // For backwards compatibility, we'll still recognize it at the
 771                                 // login form to minimize surprises for people who have been
 772                                 // logging in with a temporary password for some time.
 773                                 //
 774                                 // As a side-effect, we can authenticate the user's e-mail ad-
 775                                 // dress if it's not already done, since the temporary password
 776                                 // was sent via e-mail.
 777                                 if ( !$u->isEmailConfirmed() && !wfReadOnly() ) {
 778                                         $u->confirmEmail();
 779                                         $u->saveSettings();
 780                                 }
 781
 782                                 // At this point we just return an appropriate code/ indicating
 783                                 // that the UI should show a password reset form; bot inter-
 784                                 // faces etc will probably just fail cleanly here.
 785                                 $this->mAbortLoginErrorMsg = 'resetpass-temp-emailed';
 786                                 $this->mTempPasswordUsed = true;
 787                                 $retval = self::RESET_PASS;
 788                         } else {
 789                                 $retval = ( $this->mPassword == '' ) ? self::EMPTY_PASS : self::WRONG_PASS;
 790                         }
 791                 } elseif ( $wgBlockDisablesLogin && $u->isBlocked() ) {
 792                         // If we've enabled it, make it so that a blocked user cannot login
 793                         $retval = self::USER_BLOCKED;
 794                 } elseif ( $u->getPasswordExpired() == 'hard' ) {
 795                         // Force reset now, without logging in
 796                         $retval = self::RESET_PASS;
 797                         $this->mAbortLoginErrorMsg = 'resetpass-expired';
 798                 } else {
 799                         $wgAuth->updateUser( $u );
 800                         $wgUser = $u;
 801                         // This should set it for OutputPage and the Skin
 802                         // which is needed or the personal links will be
 803                         // wrong.
 804                         $this->getContext()->setUser( $u );
 805
 806                         // Please reset throttle for successful logins, thanks!
 807                         if ( $throttleCount ) {
 808                                 self::clearLoginThrottle( $this->mUsername );
 809                         }
 810
 811                         if ( $isAutoCreated ) {
 812                                 // Must be run after $wgUser is set, for correct new user log
 813                                 Hooks::run( 'AuthPluginAutoCreate', array( $u ) );
 814                         }
 815
 816                         $retval = self::SUCCESS;
 817                 }
 818                 Hooks::run( 'LoginAuthenticateAudit', array( $u, $this->mPassword, $retval ) );
 819
 820                 return $retval;
 821         }
 822
 823         /**
 824          * Increment the login attempt throttle hit count for the (username,current IP)
 825          * tuple unless the throttle was already reached.
 826          * @param string $username The user name
 827          * @return bool|int The integer hit count or True if it is already at the limit
 828          */
 829         public static function incLoginThrottle( $username ) {
 830                 global $wgPasswordAttemptThrottle, $wgMemc, $wgRequest;
 831                 $username = trim( $username ); // sanity
 832
 833                 $throttleCount = 0;
 834                 if ( is_array( $wgPasswordAttemptThrottle ) ) {
 835                         $throttleKey = wfMemcKey( 'password-throttle', $wgRequest->getIP(), md5( $username ) );
 836                         $count = $wgPasswordAttemptThrottle['count'];
 837                         $period = $wgPasswordAttemptThrottle['seconds'];
 838
 839                         $throttleCount = $wgMemc->get( $throttleKey );
 840                         if ( !$throttleCount ) {
 841                                 $wgMemc->add( $throttleKey, 1, $period ); // start counter
 842                         } elseif ( $throttleCount < $count ) {
 843                                 $wgMemc->incr( $throttleKey );
 844                         } elseif ( $throttleCount >= $count ) {
 845                                 return true;
 846                         }
 847                 }
 848
 849                 return $throttleCount;
 850         }
 851
 852         /**
 853          * Clear the login attempt throttle hit count for the (username,current IP) tuple.
 854          * @param string $username The user name
 855          * @return void
 856          */
 857         public static function clearLoginThrottle( $username ) {
 858                 global $wgMemc, $wgRequest;
 859                 $username = trim( $username ); // sanity
 860
 861                 $throttleKey = wfMemcKey( 'password-throttle', $wgRequest->getIP(), md5( $username ) );
 862                 $wgMemc->delete( $throttleKey );
 863         }
 864
 865         /**
 866          * Attempt to automatically create a user on login. Only succeeds if there
 867          * is an external authentication method which allows it.
 868          *
 869          * @param User $user
 870          *
 871          * @return int Status code
 872          */
 873         function attemptAutoCreate( $user ) {
 874                 global $wgAuth;
 875
 876                 if ( $this->getUser()->isBlockedFromCreateAccount() ) {
 877                         wfDebug( __METHOD__ . ": user is blocked from account creation\n" );
 878
 879                         return self::CREATE_BLOCKED;
 880                 }
 881
 882                 if ( !$wgAuth->autoCreate() ) {
 883                         return self::NOT_EXISTS;
 884                 }
 885
 886                 if ( !$wgAuth->userExists( $user->getName() ) ) {
 887                         wfDebug( __METHOD__ . ": user does not exist\n" );
 888
 889                         return self::NOT_EXISTS;
 890                 }
 891
 892                 if ( !$wgAuth->authenticate( $user->getName(), $this->mPassword ) ) {
 893                         wfDebug( __METHOD__ . ": \$wgAuth->authenticate() returned false, aborting\n" );
 894
 895                         return self::WRONG_PLUGIN_PASS;
 896                 }
 897
 898                 $abortError = '';
 899                 if ( !Hooks::run( 'AbortAutoAccount', array( $user, &$abortError ) ) ) {
 900                         // Hook point to add extra creation throttles and blocks
 901                         wfDebug( "LoginForm::attemptAutoCreate: a hook blocked creation: $abortError\n" );
 902                         $this->mAbortLoginErrorMsg = $abortError;
 903
 904                         return self::ABORTED;
 905                 }
 906
 907                 wfDebug( __METHOD__ . ": creating account\n" );
 908                 $status = $this->initUser( $user, true );
 909
 910                 if ( !$status->isOK() ) {
 911                         $errors = $status->getErrorsByType( 'error' );
 912                         $this->mAbortLoginErrorMsg = $errors[0]['message'];
 913
 914                         return self::ABORTED;
 915                 }
 916
 917                 return self::SUCCESS;
 918         }
 919
 920         function processLogin() {
 921                 global $wgMemc, $wgLang, $wgSecureLogin, $wgPasswordAttemptThrottle,
 922                         $wgInvalidPasswordReset;
 923
 924                 $status = $this->authenticateUserData();
 925                 switch ( $status ) {
 926                         case self::SUCCESS:
 927                                 # We've verified now, update the real record
 928                                 $user = $this->getUser();
 929                                 $user->touch();
 930
 931                                 if ( $user->requiresHTTPS() ) {
 932                                         $this->mStickHTTPS = true;
 933                                 }
 934
 935                                 if ( $wgSecureLogin && !$this->mStickHTTPS ) {
 936                                         $user->setCookies( $this->mRequest, false, $this->mRemember );
 937                                 } else {
 938                                         $user->setCookies( $this->mRequest, null, $this->mRemember );
 939                                 }
 940                                 self::clearLoginToken();
 941
 942                                 // Reset the throttle
 943                                 $request = $this->getRequest();
 944                                 $key = wfMemcKey( 'password-throttle', $request->getIP(), md5( $this->mUsername ) );
 945                                 $wgMemc->delete( $key );
 946
 947                                 if ( $this->hasSessionCookie() || $this->mSkipCookieCheck ) {
 948                                         /* Replace the language object to provide user interface in
 949                                          * correct language immediately on this first page load.
 950                                          */
 951                                         $code = $request->getVal( 'uselang', $user->getOption( 'language' ) );
 952                                         $userLang = Language::factory( $code );
 953                                         $wgLang = $userLang;
 954                                         $this->getContext()->setLanguage( $userLang );
 955                                         // Reset SessionID on Successful login (bug 40995)
 956                                         $this->renewSessionId();
 957                                         if ( $this->getUser()->getPasswordExpired() == 'soft' ) {
 958                                                 $this->resetLoginForm( $this->msg( 'resetpass-expired-soft' ) );
 959                                         } elseif ( $wgInvalidPasswordReset
 960                                                 && !$user->isValidPassword( $this->mPassword )
 961                                         ) {
 962                                                 $status = $user->checkPasswordValidity(
 963                                                         $this->mPassword,
 964                                                         'login'
 965                                                 );
 966                                                 $this->resetLoginForm(
 967                                                         $status->getMessage( 'resetpass-validity-soft' )
 968                                                 );
 969                                         } else {
 970                                                 $this->successfulLogin();
 971                                         }
 972                                 } else {
 973                                         $this->cookieRedirectCheck( 'login' );
 974                                 }
 975                                 break;
 976
 977                         case self::NEED_TOKEN:
 978                                 $error = $this->mAbortLoginErrorMsg ?: 'nocookiesforlogin';
 979                                 $this->mainLoginForm( $this->msg( $error )->parse() );
 980                                 break;
 981                         case self::WRONG_TOKEN:
 982                                 $error = $this->mAbortLoginErrorMsg ?: 'sessionfailure';
 983                                 $this->mainLoginForm( $this->msg( $error )->text() );
 984                                 break;
 985                         case self::NO_NAME:
 986                         case self::ILLEGAL:
 987                                 $error = $this->mAbortLoginErrorMsg ?: 'noname';
 988                                 $this->mainLoginForm( $this->msg( $error )->text() );
 989                                 break;
 990                         case self::WRONG_PLUGIN_PASS:
 991                                 $error = $this->mAbortLoginErrorMsg ?: 'wrongpassword';
 992                                 $this->mainLoginForm( $this->msg( $error )->text() );
 993                                 break;
 994                         case self::NOT_EXISTS:
 995                                 if ( $this->getUser()->isAllowed( 'createaccount' ) ) {
 996                                         $error = $this->mAbortLoginErrorMsg ?: 'nosuchuser';
 997                                         $this->mainLoginForm( $this->msg( $error,
 998                                                 wfEscapeWikiText( $this->mUsername ) )->parse() );
 999                                 } else {
1000                                         $error = $this->mAbortLoginErrorMsg ?: 'nosuchusershort';
1001                                         $this->mainLoginForm( $this->msg( $error,
1002                                                 wfEscapeWikiText( $this->mUsername ) )->text() );
1003                                 }
1004                                 break;
1005                         case self::WRONG_PASS:
1006                                 $error = $this->mAbortLoginErrorMsg ?: 'wrongpassword';
1007                                 $this->mainLoginForm( $this->msg( $error )->text() );
1008                                 break;
1009                         case self::EMPTY_PASS:
1010                                 $error = $this->mAbortLoginErrorMsg ?: 'wrongpasswordempty';
1011                                 $this->mainLoginForm( $this->msg( $error )->text() );
1012                                 break;
1013                         case self::RESET_PASS:
1014                                 $error = $this->mAbortLoginErrorMsg ?: 'resetpass_announce';
1015                                 $this->resetLoginForm( $this->msg( $error ) );
1016                                 break;
1017                         case self::CREATE_BLOCKED:
1018                                 $this->userBlockedMessage( $this->getUser()->isBlockedFromCreateAccount() );
1019                                 break;
1020                         case self::THROTTLED:
1021                                 $error = $this->mAbortLoginErrorMsg ?: 'login-throttled';
1022                                 $this->mainLoginForm( $this->msg( $error )
1023                                         ->params( $this->getLanguage()->formatDuration( $wgPasswordAttemptThrottle['seconds'] ) )
1024                                         ->text()
1025                                 );
1026                                 break;
1027                         case self::USER_BLOCKED:
1028                                 $error = $this->mAbortLoginErrorMsg ?: 'login-userblocked';
1029                                 $this->mainLoginForm( $this->msg( $error, $this->mUsername )->escaped() );
1030                                 break;
1031                         case self::ABORTED:
1032                                 $error = $this->mAbortLoginErrorMsg ?: 'login-abort-generic';
1033                                 $this->mainLoginForm( $this->msg( $error,
1034                                                 wfEscapeWikiText( $this->mUsername ) )->text() );
1035                                 break;
1036                         case self::USER_MIGRATED:
1037                                 $error = $this->mAbortLoginErrorMsg ?: 'login-migrated-generic';
1038                                 $params = array();
1039                                 if ( is_array( $error ) ) {
1040                                         $error = array_shift( $this->mAbortLoginErrorMsg );
1041                                         $params = $this->mAbortLoginErrorMsg;
1042                                 }
1043                                 $this->mainLoginForm( $this->msg( $error, $params )->text() );
1044                                 break;
1045                         default:
1046                                 throw new MWException( 'Unhandled case value' );
1047                 }
1048
1049                 LoggerFactory::getInstance( 'authmanager' )->info( 'Login attempt', array(
1050                         'event' => 'login',
1051                         'successful' => $status === self::SUCCESS,
1052                         'status' => $status,
1053                 ) );
1054         }
1055
1056         /**
1057          * Show the Special:ChangePassword form, with custom message
1058          * @param Message $msg
1059          */
1060         protected function resetLoginForm( Message $msg ) {
1061                 // Allow hooks to explain this password reset in more detail
1062                 Hooks::run( 'LoginPasswordResetMessage', array( &$msg, $this->mUsername ) );
1063                 $reset = new SpecialChangePassword();
1064                 $derivative = new DerivativeContext( $this->getContext() );
1065                 $derivative->setTitle( $reset->getPageTitle() );
1066                 $reset->setContext( $derivative );
1067                 if ( !$this->mTempPasswordUsed ) {
1068                         $reset->setOldPasswordMessage( 'oldpassword' );
1069                 }
1070                 $reset->setChangeMessage( $msg );
1071                 $reset->execute( null );
1072         }
1073
1074         /**
1075          * @param User $u
1076          * @param bool $throttle
1077          * @param string $emailTitle Message name of email title
1078          * @param string $emailText Message name of email text
1079          * @return Status
1080          */
1081         function mailPasswordInternal( $u, $throttle = true, $emailTitle = 'passwordremindertitle',
1082                 $emailText = 'passwordremindertext'
1083         ) {
1084                 global $wgNewPasswordExpiry;
1085
1086                 if ( $u->getEmail() == '' ) {
1087                         return Status::newFatal( 'noemail', $u->getName() );
1088                 }
1089                 $ip = $this->getRequest()->getIP();
1090                 if ( !$ip ) {
1091                         return Status::newFatal( 'badipaddress' );
1092                 }
1093
1094                 $currentUser = $this->getUser();
1095                 Hooks::run( 'User::mailPasswordInternal', array( &$currentUser, &$ip, &$u ) );
1096
1097                 $np = $u->randomPassword();
1098                 $u->setNewpassword( $np, $throttle );
1099                 $u->saveSettings();
1100                 $userLanguage = $u->getOption( 'language' );
1101
1102                 $mainPage = Title::newMainPage();
1103                 $mainPageUrl = $mainPage->getCanonicalURL();
1104
1105                 $m = $this->msg( $emailText, $ip, $u->getName(), $np, '<' . $mainPageUrl . '>',
1106                         round( $wgNewPasswordExpiry / 86400 ) )->inLanguage( $userLanguage )->text();
1107                 $result = $u->sendMail( $this->msg( $emailTitle )->inLanguage( $userLanguage )->text(), $m );
1108
1109                 return $result;
1110         }
1111
1112         /**
1113          * Run any hooks registered for logins, then HTTP redirect to
1114          * $this->mReturnTo (or Main Page if that's undefined).  Formerly we had a
1115          * nice message here, but that's really not as useful as just being sent to
1116          * wherever you logged in from.  It should be clear that the action was
1117          * successful, given the lack of error messages plus the appearance of your
1118          * name in the upper right.
1119          *
1120          * @private
1121          */
1122         function successfulLogin() {
1123                 # Run any hooks; display injected HTML if any, else redirect
1124                 $currentUser = $this->getUser();
1125                 $injected_html = '';
1126                 Hooks::run( 'UserLoginComplete', array( &$currentUser, &$injected_html ) );
1127
1128                 if ( $injected_html !== '' ) {
1129                         $this->displaySuccessfulAction( 'success', $this->msg( 'loginsuccesstitle' ),
1130                                 'loginsuccess', $injected_html );
1131                 } else {
1132                         $this->executeReturnTo( 'successredirect' );
1133                 }
1134         }
1135
1136         /**
1137          * Run any hooks registered for logins, then display a message welcoming
1138          * the user.
1139          *
1140          * @private
1141          */
1142         function successfulCreation() {
1143                 # Run any hooks; display injected HTML
1144                 $currentUser = $this->getUser();
1145                 $injected_html = '';
1146                 $welcome_creation_msg = 'welcomecreation-msg';
1147
1148                 Hooks::run( 'UserLoginComplete', array( &$currentUser, &$injected_html ) );
1149
1150                 /**
1151                  * Let any extensions change what message is shown.
1152                  * @see https://www.mediawiki.org/wiki/Manual:Hooks/BeforeWelcomeCreation
1153                  * @since 1.18
1154                  */
1155                 Hooks::run( 'BeforeWelcomeCreation', array( &$welcome_creation_msg, &$injected_html ) );
1156
1157                 $this->displaySuccessfulAction(
1158                         'signup',
1159                         $this->msg( 'welcomeuser', $this->getUser()->getName() ),
1160                         $welcome_creation_msg, $injected_html
1161                 );
1162         }
1163
1164         /**
1165          * Display a "successful action" page.
1166          *
1167          * @param string $type Condition of return to; see `executeReturnTo`
1168          * @param string|Message $title Page's title
1169          * @param string $msgname
1170          * @param string $injected_html
1171          */
1172         private function displaySuccessfulAction( $type, $title, $msgname, $injected_html ) {
1173                 $out = $this->getOutput();
1174                 $out->setPageTitle( $title );
1175                 if ( $msgname ) {
1176                         $out->addWikiMsg( $msgname, wfEscapeWikiText( $this->getUser()->getName() ) );
1177                 }
1178
1179                 $out->addHTML( $injected_html );
1180
1181                 $this->executeReturnTo( $type );
1182         }
1183
1184         /**
1185          * Output a message that informs the user that they cannot create an account because
1186          * there is a block on them or their IP which prevents account creation.  Note that
1187          * User::isBlockedFromCreateAccount(), which gets this block, ignores the 'hardblock'
1188          * setting on blocks (bug 13611).
1189          * @param Block $block The block causing this error
1190          * @throws ErrorPageError
1191          */
1192         function userBlockedMessage( Block $block ) {
1193                 # Let's be nice about this, it's likely that this feature will be used
1194                 # for blocking large numbers of innocent people, e.g. range blocks on
1195                 # schools. Don't blame it on the user. There's a small chance that it
1196                 # really is the user's fault, i.e. the username is blocked and they
1197                 # haven't bothered to log out before trying to create an account to
1198                 # evade it, but we'll leave that to their guilty conscience to figure
1199                 # out.
1200                 $errorParams = array(
1201                         $block->getTarget(),
1202                         $block->mReason ? $block->mReason : $this->msg( 'blockednoreason' )->text(),
1203                         $block->getByName()
1204                 );
1205
1206                 if ( $block->getType() === Block::TYPE_RANGE ) {
1207                         $errorMessage = 'cantcreateaccount-range-text';
1208                         $errorParams[] = $this->getRequest()->getIP();
1209                 } else {
1210                         $errorMessage = 'cantcreateaccount-text';
1211                 }
1212
1213                 throw new ErrorPageError(
1214                         'cantcreateaccounttitle',
1215                         $errorMessage,
1216                         $errorParams
1217                 );
1218         }
1219
1220         /**
1221          * Add a "return to" link or redirect to it.
1222          * Extensions can use this to reuse the "return to" logic after
1223          * inject steps (such as redirection) into the login process.
1224          *
1225          * @param string $type One of the following:
1226          *    - error: display a return to link ignoring $wgRedirectOnLogin
1227          *    - signup: display a return to link using $wgRedirectOnLogin if needed
1228          *    - success: display a return to link using $wgRedirectOnLogin if needed
1229          *    - successredirect: send an HTTP redirect using $wgRedirectOnLogin if needed
1230          * @param string $returnTo
1231          * @param array|string $returnToQuery
1232          * @param bool $stickHTTPs Keep redirect link on HTTPs
1233          * @since 1.22
1234          */
1235         public function showReturnToPage(
1236                 $type, $returnTo = '', $returnToQuery = '', $stickHTTPs = false
1237         ) {
1238                 $this->mReturnTo = $returnTo;
1239                 $this->mReturnToQuery = $returnToQuery;
1240                 $this->mStickHTTPS = $stickHTTPs;
1241                 $this->executeReturnTo( $type );
1242         }
1243
1244         /**
1245          * Add a "return to" link or redirect to it.
1246          *
1247          * @param string $type One of the following:
1248          *    - error: display a return to link ignoring $wgRedirectOnLogin
1249          *    - signup: display a return to link using $wgRedirectOnLogin if needed
1250          *    - success: display a return to link using $wgRedirectOnLogin if needed
1251          *    - successredirect: send an HTTP redirect using $wgRedirectOnLogin if needed
1252          */
1253         private function executeReturnTo( $type ) {
1254                 global $wgRedirectOnLogin, $wgSecureLogin;
1255
1256                 if ( $type != 'error' && $wgRedirectOnLogin !== null ) {
1257                         $returnTo = $wgRedirectOnLogin;
1258                         $returnToQuery = array();
1259                 } else {
1260                         $returnTo = $this->mReturnTo;
1261                         $returnToQuery = wfCgiToArray( $this->mReturnToQuery );
1262                 }
1263
1264                 // Allow modification of redirect behavior
1265                 Hooks::run( 'PostLoginRedirect', array( &$returnTo, &$returnToQuery, &$type ) );
1266
1267                 $returnToTitle = Title::newFromText( $returnTo );
1268                 if ( !$returnToTitle ) {
1269                         $returnToTitle = Title::newMainPage();
1270                 }
1271
1272                 if ( $wgSecureLogin && !$this->mStickHTTPS ) {
1273                         $options = array( 'http' );
1274                         $proto = PROTO_HTTP;
1275                 } elseif ( $wgSecureLogin ) {
1276                         $options = array( 'https' );
1277                         $proto = PROTO_HTTPS;
1278                 } else {
1279                         $options = array();
1280                         $proto = PROTO_RELATIVE;
1281                 }
1282
1283                 if ( $type == 'successredirect' ) {
1284                         $redirectUrl = $returnToTitle->getFullURL( $returnToQuery, false, $proto );
1285                         $this->getOutput()->redirect( $redirectUrl );
1286                 } else {
1287                         $this->getOutput()->addReturnTo( $returnToTitle, $returnToQuery, null, $options );
1288                 }
1289         }
1290
1291         /**
1292          * @param string $msg
1293          * @param string $msgtype
1294          * @throws ErrorPageError
1295          * @throws Exception
1296          * @throws FatalError
1297          * @throws MWException
1298          * @throws PermissionsError
1299          * @throws ReadOnlyError
1300          * @private
1301          */
1302         function mainLoginForm( $msg, $msgtype = 'error' ) {
1303                 global $wgEnableEmail, $wgEnableUserEmail;
1304                 global $wgHiddenPrefs, $wgLoginLanguageSelector;
1305                 global $wgAuth, $wgEmailConfirmToEdit;
1306                 global $wgSecureLogin, $wgPasswordResetRoutes;
1307                 global $wgExtendedLoginCookieExpiration, $wgCookieExpiration;
1308
1309                 $titleObj = $this->getPageTitle();
1310                 $user = $this->getUser();
1311                 $out = $this->getOutput();
1312
1313                 if ( $this->mType == 'signup' ) {
1314                         // Block signup here if in readonly. Keeps user from
1315                         // going through the process (filling out data, etc)
1316                         // and being informed later.
1317                         $permErrors = $titleObj->getUserPermissionsErrors( 'createaccount', $user, true );
1318                         if ( count( $permErrors ) ) {
1319                                 throw new PermissionsError( 'createaccount', $permErrors );
1320                         } elseif ( $user->isBlockedFromCreateAccount() ) {
1321                                 $this->userBlockedMessage( $user->isBlockedFromCreateAccount() );
1322
1323                                 return;
1324                         } elseif ( wfReadOnly() ) {
1325                                 throw new ReadOnlyError;
1326                         }
1327                 }
1328
1329                 // Pre-fill username (if not creating an account, bug 44775).
1330                 if ( $this->mUsername == '' && $this->mType != 'signup' ) {
1331                         if ( $user->isLoggedIn() ) {
1332                                 $this->mUsername = $user->getName();
1333                         } else {
1334                                 $this->mUsername = $this->getRequest()->getCookie( 'UserName' );
1335                         }
1336                 }
1337
1338                 // Generic styles and scripts for both login and signup form
1339                 $out->addModuleStyles( array(
1340                         'mediawiki.ui',
1341                         'mediawiki.ui.button',
1342                         'mediawiki.ui.checkbox',
1343                         'mediawiki.ui.input',
1344                         'mediawiki.special.userlogin.common.styles'
1345                 ) );
1346                 $out->addModules( array(
1347                         'mediawiki.special.userlogin.common.js'
1348                 ) );
1349
1350                 if ( $this->mType == 'signup' ) {
1351                         // XXX hack pending RL or JS parse() support for complex content messages
1352                         // https://bugzilla.wikimedia.org/show_bug.cgi?id=25349
1353                         $out->addJsConfigVars( 'wgCreateacctImgcaptchaHelp',
1354                                 $this->msg( 'createacct-imgcaptcha-help' )->parse() );
1355
1356                         // Additional styles and scripts for signup form
1357                         $out->addModules( array(
1358                                 'mediawiki.special.userlogin.signup.js'
1359                         ) );
1360                         $out->addModuleStyles( array(
1361                                 'mediawiki.special.userlogin.signup.styles'
1362                         ) );
1363
1364                         $template = new UsercreateTemplate( $this->getConfig() );
1365
1366                         // Must match number of benefits defined in messages
1367                         $template->set( 'benefitCount', 3 );
1368
1369                         $q = 'action=submitlogin&type=signup';
1370                         $linkq = 'type=login';
1371                 } else {
1372                         // Additional styles for login form
1373                         $out->addModuleStyles( array(
1374                                 'mediawiki.special.userlogin.login.styles'
1375                         ) );
1376
1377                         $template = new UserloginTemplate( $this->getConfig() );
1378
1379                         $q = 'action=submitlogin&type=login';
1380                         $linkq = 'type=signup';
1381                 }
1382
1383                 if ( $this->mReturnTo !== '' ) {
1384                         $returnto = '&returnto=' . wfUrlencode( $this->mReturnTo );
1385                         if ( $this->mReturnToQuery !== '' ) {
1386                                 $returnto .= '&returntoquery=' .
1387                                         wfUrlencode( $this->mReturnToQuery );
1388                         }
1389                         $q .= $returnto;
1390                         $linkq .= $returnto;
1391                 }
1392
1393                 # Don't show a "create account" link if the user can't.
1394                 if ( $this->showCreateOrLoginLink( $user ) ) {
1395                         # Pass any language selection on to the mode switch link
1396                         if ( $wgLoginLanguageSelector && $this->mLanguage ) {
1397                                 $linkq .= '&uselang=' . $this->mLanguage;
1398                         }
1399                         // Supply URL, login template creates the button.
1400                         $template->set( 'createOrLoginHref', $titleObj->getLocalURL( $linkq ) );
1401                 } else {
1402                         $template->set( 'link', '' );
1403                 }
1404
1405                 $resetLink = $this->mType == 'signup'
1406                         ? null
1407                         : is_array( $wgPasswordResetRoutes ) && in_array( true, array_values( $wgPasswordResetRoutes ) );
1408
1409                 $template->set( 'header', '' );
1410                 $template->set( 'formheader', '' );
1411                 $template->set( 'skin', $this->getSkin() );
1412                 $template->set( 'name', $this->mUsername );
1413                 $template->set( 'password', $this->mPassword );
1414                 $template->set( 'retype', $this->mRetype );
1415                 $template->set( 'createemailset', $this->mCreateaccountMail );
1416                 $template->set( 'email', $this->mEmail );
1417                 $template->set( 'realname', $this->mRealName );
1418                 $template->set( 'domain', $this->mDomain );
1419                 $template->set( 'reason', $this->mReason );
1420
1421                 $template->set( 'action', $titleObj->getLocalURL( $q ) );
1422                 $template->set( 'message', $msg );
1423                 $template->set( 'messagetype', $msgtype );
1424                 $template->set( 'createemail', $wgEnableEmail && $user->isLoggedIn() );
1425                 $template->set( 'userealname', !in_array( 'realname', $wgHiddenPrefs ) );
1426                 $template->set( 'useemail', $wgEnableEmail );
1427                 $template->set( 'emailrequired', $wgEmailConfirmToEdit );
1428                 $template->set( 'emailothers', $wgEnableUserEmail );
1429                 $template->set( 'canreset', $wgAuth->allowPasswordChange() );
1430                 $template->set( 'resetlink', $resetLink );
1431                 $template->set( 'canremember', $wgExtendedLoginCookieExpiration === null ? ( $wgCookieExpiration > 0 ) : ( $wgExtendedLoginCookieExpiration > 0 ) );
1432                 $template->set( 'usereason', $user->isLoggedIn() );
1433                 $template->set( 'remember', $this->mRemember );
1434                 $template->set( 'cansecurelogin', ( $wgSecureLogin === true ) );
1435                 $template->set( 'stickhttps', (int)$this->mStickHTTPS );
1436                 $template->set( 'loggedin', $user->isLoggedIn() );
1437                 $template->set( 'loggedinuser', $user->getName() );
1438
1439                 if ( $this->mType == 'signup' ) {
1440                         if ( !self::getCreateaccountToken() ) {
1441                                 self::setCreateaccountToken();
1442                         }
1443                         $template->set( 'token', self::getCreateaccountToken() );
1444                 } else {
1445                         if ( !self::getLoginToken() ) {
1446                                 self::setLoginToken();
1447                         }
1448                         $template->set( 'token', self::getLoginToken() );
1449                 }
1450
1451                 # Prepare language selection links as needed
1452                 if ( $wgLoginLanguageSelector ) {
1453                         $template->set( 'languages', $this->makeLanguageSelector() );
1454                         if ( $this->mLanguage ) {
1455                                 $template->set( 'uselang', $this->mLanguage );
1456                         }
1457                 }
1458
1459                 $template->set( 'secureLoginUrl', $this->mSecureLoginUrl );
1460                 // Use signupend-https for HTTPS requests if it's not blank, signupend otherwise
1461                 $usingHTTPS = $this->mRequest->getProtocol() == 'https';
1462                 $signupendHTTPS = $this->msg( 'signupend-https' );
1463                 if ( $usingHTTPS && !$signupendHTTPS->isBlank() ) {
1464                         $template->set( 'signupend', $signupendHTTPS->parse() );
1465                 } else {
1466                         $template->set( 'signupend', $this->msg( 'signupend' )->parse() );
1467                 }
1468
1469                 // If using HTTPS coming from HTTP, then the 'fromhttp' parameter must be preserved
1470                 if ( $usingHTTPS ) {
1471                         $template->set( 'fromhttp', $this->mFromHTTP );
1472                 }
1473
1474                 // Give authentication and captcha plugins a chance to modify the form
1475                 $wgAuth->modifyUITemplate( $template, $this->mType );
1476                 if ( $this->mType == 'signup' ) {
1477                         Hooks::run( 'UserCreateForm', array( &$template ) );
1478                 } else {
1479                         Hooks::run( 'UserLoginForm', array( &$template ) );
1480                 }
1481
1482                 $out->disallowUserJs(); // just in case...
1483                 $out->addTemplate( $template );
1484         }
1485
1486         /**
1487          * Whether the login/create account form should display a link to the
1488          * other form (in addition to whatever the skin provides).
1489          *
1490          * @param User $user
1491          * @return bool
1492          */
1493         private function showCreateOrLoginLink( &$user ) {
1494                 if ( $this->mType == 'signup' ) {
1495                         return true;
1496                 } elseif ( $user->isAllowed( 'createaccount' ) ) {
1497                         return true;
1498                 } else {
1499                         return false;
1500                 }
1501         }
1502
1503         /**
1504          * Check if a session cookie is present.
1505          *
1506          * This will not pick up a cookie set during _this_ request, but is meant
1507          * to ensure that the client is returning the cookie which was set on a
1508          * previous pass through the system.
1509          *
1510          * @private
1511          * @return bool
1512          */
1513         function hasSessionCookie() {
1514                 global $wgDisableCookieCheck;
1515
1516                 return $wgDisableCookieCheck ? true : $this->getRequest()->checkSessionCookie();
1517         }
1518
1519         /**
1520          * Get the login token from the current session
1521          * @return mixed
1522          */
1523         public static function getLoginToken() {
1524                 global $wgRequest;
1525
1526                 return $wgRequest->getSessionData( 'wsLoginToken' );
1527         }
1528
1529         /**
1530          * Randomly generate a new login token and attach it to the current session
1531          */
1532         public static function setLoginToken() {
1533                 global $wgRequest;
1534                 // Generate a token directly instead of using $user->getEditToken()
1535                 // because the latter reuses $_SESSION['wsEditToken']
1536                 $wgRequest->setSessionData( 'wsLoginToken', MWCryptRand::generateHex( 32 ) );
1537         }
1538
1539         /**
1540          * Remove any login token attached to the current session
1541          */
1542         public static function clearLoginToken() {
1543                 global $wgRequest;
1544                 $wgRequest->setSessionData( 'wsLoginToken', null );
1545         }
1546
1547         /**
1548          * Get the createaccount token from the current session
1549          * @return mixed
1550          */
1551         public static function getCreateaccountToken() {
1552                 global $wgRequest;
1553                 return $wgRequest->getSessionData( 'wsCreateaccountToken' );
1554         }
1555
1556         /**
1557          * Randomly generate a new createaccount token and attach it to the current session
1558          */
1559         public static function setCreateaccountToken() {
1560                 global $wgRequest;
1561                 $wgRequest->setSessionData( 'wsCreateaccountToken', MWCryptRand::generateHex( 32 ) );
1562         }
1563
1564         /**
1565          * Remove any createaccount token attached to the current session
1566          */
1567         public static function clearCreateaccountToken() {
1568                 global $wgRequest;
1569                 $wgRequest->setSessionData( 'wsCreateaccountToken', null );
1570         }
1571
1572         /**
1573          * Renew the user's session id, using strong entropy
1574          */
1575         private function renewSessionId() {
1576                 global $wgSecureLogin, $wgCookieSecure;
1577                 if ( $wgSecureLogin && !$this->mStickHTTPS ) {
1578                         $wgCookieSecure = false;
1579                 }
1580
1581                 wfResetSessionID();
1582         }
1583
1584         /**
1585          * @param string $type
1586          * @private
1587          */
1588         function cookieRedirectCheck( $type ) {
1589                 $titleObj = SpecialPage::getTitleFor( 'Userlogin' );
1590                 $query = array( 'wpCookieCheck' => $type );
1591                 if ( $this->mReturnTo !== '' ) {
1592                         $query['returnto'] = $this->mReturnTo;
1593                         $query['returntoquery'] = $this->mReturnToQuery;
1594                 }
1595                 $check = $titleObj->getFullURL( $query );
1596
1597                 $this->getOutput()->redirect( $check );
1598         }
1599
1600         /**
1601          * @param string $type
1602          * @private
1603          */
1604         function onCookieRedirectCheck( $type ) {
1605                 if ( !$this->hasSessionCookie() ) {
1606                         if ( $type == 'new' ) {
1607                                 $this->mainLoginForm( $this->msg( 'nocookiesnew' )->parse() );
1608                         } elseif ( $type == 'login' ) {
1609                                 $this->mainLoginForm( $this->msg( 'nocookieslogin' )->parse() );
1610                         } else {
1611                                 # shouldn't happen
1612                                 $this->mainLoginForm( $this->msg( 'error' )->text() );
1613                         }
1614                 } else {
1615                         $this->successfulLogin();
1616                 }
1617         }
1618
1619         /**
1620          * Produce a bar of links which allow the user to select another language
1621          * during login/registration but retain "returnto"
1622          *
1623          * @return string
1624          */
1625         function makeLanguageSelector() {
1626                 $msg = $this->msg( 'loginlanguagelinks' )->inContentLanguage();
1627                 if ( $msg->isBlank() ) {
1628                         return '';
1629                 }
1630                 $langs = explode( "\n", $msg->text() );
1631                 $links = array();
1632                 foreach ( $langs as $lang ) {
1633                         $lang = trim( $lang, '* ' );
1634                         $parts = explode( '|', $lang );
1635                         if ( count( $parts ) >= 2 ) {
1636                                 $links[] = $this->makeLanguageSelectorLink( $parts[0], trim( $parts[1] ) );
1637                         }
1638                 }
1639
1640                 return count( $links ) > 0 ? $this->msg( 'loginlanguagelabel' )->rawParams(
1641                         $this->getLanguage()->pipeList( $links ) )->escaped() : '';
1642         }
1643
1644         /**
1645          * Create a language selector link for a particular language
1646          * Links back to this page preserving type and returnto
1647          *
1648          * @param string $text Link text
1649          * @param string $lang Language code
1650          * @return string
1651          */
1652         function makeLanguageSelectorLink( $text, $lang ) {
1653                 if ( $this->getLanguage()->getCode() == $lang ) {
1654                         // no link for currently used language
1655                         return htmlspecialchars( $text );
1656                 }
1657                 $query = array( 'uselang' => $lang );
1658                 if ( $this->mType == 'signup' ) {
1659                         $query['type'] = 'signup';
1660                 }
1661                 if ( $this->mReturnTo !== '' ) {
1662                         $query['returnto'] = $this->mReturnTo;
1663                         $query['returntoquery'] = $this->mReturnToQuery;
1664                 }
1665
1666                 $attr = array();
1667                 $targetLanguage = Language::factory( $lang );
1668                 $attr['lang'] = $attr['hreflang'] = $targetLanguage->getHtmlCode();
1669
1670                 return Linker::linkKnown(
1671                         $this->getPageTitle(),
1672                         htmlspecialchars( $text ),
1673                         $attr,
1674                         $query
1675                 );
1676         }
1677
1678         protected function getGroupName() {
1679                 return 'login';
1680         }
1681 }