includes/specials/SpecialUserlogin.php

   1 <?php
   2 /**
   3  * Implements Special:UserLogin
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License along
  16  * with this program; if not, write to the Free Software Foundation, Inc.,
  17  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  18  * http://www.gnu.org/copyleft/gpl.html
  19  *
  20  * @file
  21  * @ingroup SpecialPage
  22  */
  23
  24 /**
  25  * Implements Special:UserLogin
  26  *
  27  * @ingroup SpecialPage
  28  */
  29 class LoginForm extends SpecialPage {
  30         const SUCCESS = 0;
  31         const NO_NAME = 1;
  32         const ILLEGAL = 2;
  33         const WRONG_PLUGIN_PASS = 3;
  34         const NOT_EXISTS = 4;
  35         const WRONG_PASS = 5;
  36         const EMPTY_PASS = 6;
  37         const RESET_PASS = 7;
  38         const ABORTED = 8;
  39         const CREATE_BLOCKED = 9;
  40         const THROTTLED = 10;
  41         const USER_BLOCKED = 11;
  42         const NEED_TOKEN = 12;
  43         const WRONG_TOKEN = 13;
  44         const USER_MIGRATED = 14;
  45
  46         /**
  47          * Valid error and warning messages
  48          *
  49          * Special:Userlogin can show an error or warning message on the form when
  50          * coming from another page. This is done via the ?error= or ?warning= GET
  51          * parameters.
  52          *
  53          * This array is the list of valid message keys. All other values will be
  54          * ignored.
  55          *
  56          * @since 1.24
  57          * @var string[]
  58          */
  59         public static $validErrorMessages = array(
  60                 'exception-nologin-text',
  61                 'watchlistanontext',
  62                 'changeemail-no-info',
  63                 'resetpass-no-info',
  64                 'confirmemail_needlogin',
  65                 'prefsnologintext2',
  66         );
  67
  68         public $mAbortLoginErrorMsg = null;
  69
  70         protected $mUsername;
  71         protected $mPassword;
  72         protected $mRetype;
  73         protected $mReturnTo;
  74         protected $mCookieCheck;
  75         protected $mPosted;
  76         protected $mAction;
  77         protected $mCreateaccount;
  78         protected $mCreateaccountMail;
  79         protected $mLoginattempt;
  80         protected $mRemember;
  81         protected $mEmail;
  82         protected $mDomain;
  83         protected $mLanguage;
  84         protected $mSkipCookieCheck;
  85         protected $mReturnToQuery;
  86         protected $mToken;
  87         protected $mStickHTTPS;
  88         protected $mType;
  89         protected $mReason;
  90         protected $mRealName;
  91         protected $mEntryError = '';
  92         protected $mEntryErrorType = 'error';
  93
  94         private $mTempPasswordUsed;
  95         private $mLoaded = false;
  96         private $mSecureLoginUrl;
  97
  98         /** @var WebRequest */
  99         private $mOverrideRequest = null;
 100
 101         /** @var WebRequest Effective request; set at the beginning of load */
 102         private $mRequest = null;
 103
 104         /**
 105          * @param WebRequest $request
 106          */
 107         public function __construct( $request = null ) {
 108                 global $wgUseMediaWikiUIEverywhere;
 109                 parent::__construct( 'Userlogin' );
 110
 111                 $this->mOverrideRequest = $request;
 112                 // Override UseMediaWikiEverywhere to true, to force login and create form to use mw ui
 113                 $wgUseMediaWikiUIEverywhere = true;
 114         }
 115
 116         /**
 117          * Loader
 118          */
 119         function load() {
 120                 global $wgAuth, $wgHiddenPrefs, $wgEnableEmail;
 121
 122                 if ( $this->mLoaded ) {
 123                         return;
 124                 }
 125                 $this->mLoaded = true;
 126
 127                 if ( $this->mOverrideRequest === null ) {
 128                         $request = $this->getRequest();
 129                 } else {
 130                         $request = $this->mOverrideRequest;
 131                 }
 132                 $this->mRequest = $request;
 133
 134                 $this->mType = $request->getText( 'type' );
 135                 $this->mUsername = $request->getText( 'wpName' );
 136                 $this->mPassword = $request->getText( 'wpPassword' );
 137                 $this->mRetype = $request->getText( 'wpRetype' );
 138                 $this->mDomain = $request->getText( 'wpDomain' );
 139                 $this->mReason = $request->getText( 'wpReason' );
 140                 $this->mCookieCheck = $request->getVal( 'wpCookieCheck' );
 141                 $this->mPosted = $request->wasPosted();
 142                 $this->mCreateaccountMail = $request->getCheck( 'wpCreateaccountMail' )
 143                         && $wgEnableEmail;
 144                 $this->mCreateaccount = $request->getCheck( 'wpCreateaccount' ) && !$this->mCreateaccountMail;
 145                 $this->mLoginattempt = $request->getCheck( 'wpLoginattempt' );
 146                 $this->mAction = $request->getVal( 'action' );
 147                 $this->mRemember = $request->getCheck( 'wpRemember' );
 148                 $this->mFromHTTP = $request->getBool( 'fromhttp', false );
 149                 $this->mStickHTTPS = ( !$this->mFromHTTP && $request->getProtocol() === 'https' )
 150                         || $request->getBool( 'wpForceHttps', false );
 151                 $this->mLanguage = $request->getText( 'uselang' );
 152                 $this->mSkipCookieCheck = $request->getCheck( 'wpSkipCookieCheck' );
 153                 $this->mToken = $this->mType == 'signup'
 154                         ? $request->getVal( 'wpCreateaccountToken' )
 155                         : $request->getVal( 'wpLoginToken' );
 156                 $this->mReturnTo = $request->getVal( 'returnto', '' );
 157                 $this->mReturnToQuery = $request->getVal( 'returntoquery', '' );
 158
 159                 // Show an error or warning passed on from a previous page
 160                 $entryError = $this->msg( $request->getVal( 'error', '' ) );
 161                 $entryWarning = $this->msg( $request->getVal( 'warning', '' ) );
 162                 // bc: provide login link as a parameter for messages where the translation
 163                 // was not updated
 164                 $loginreqlink = Linker::linkKnown(
 165                         $this->getPageTitle(),
 166                         $this->msg( 'loginreqlink' )->escaped(),
 167                         array(),
 168                         array(
 169                                 'returnto' => $this->mReturnTo,
 170                                 'returntoquery' => $this->mReturnToQuery,
 171                                 'uselang' => $this->mLanguage,
 172                                 'fromhttp' => $this->mFromHTTP ? '1' : '0',
 173                         )
 174                 );
 175
 176                 // Only show valid error or warning messages.
 177                 if ( $entryError->exists()
 178                         && in_array( $entryError->getKey(), self::$validErrorMessages )
 179                 ) {
 180                         $this->mEntryErrorType = 'error';
 181                         $this->mEntryError = $entryError->rawParams( $loginreqlink )->escaped();
 182
 183                 } elseif ( $entryWarning->exists()
 184                         && in_array( $entryWarning->getKey(), self::$validErrorMessages )
 185                 ) {
 186                         $this->mEntryErrorType = 'warning';
 187                         $this->mEntryError = $entryWarning->rawParams( $loginreqlink )->escaped();
 188                 }
 189
 190                 if ( $wgEnableEmail ) {
 191                         $this->mEmail = $request->getText( 'wpEmail' );
 192                 } else {
 193                         $this->mEmail = '';
 194                 }
 195                 if ( !in_array( 'realname', $wgHiddenPrefs ) ) {
 196                         $this->mRealName = $request->getText( 'wpRealName' );
 197                 } else {
 198                         $this->mRealName = '';
 199                 }
 200
 201                 if ( !$wgAuth->validDomain( $this->mDomain ) ) {
 202                         $this->mDomain = $wgAuth->getDomain();
 203                 }
 204                 $wgAuth->setDomain( $this->mDomain );
 205
 206                 # 1. When switching accounts, it sucks to get automatically logged out
 207                 # 2. Do not return to PasswordReset after a successful password change
 208                 #    but goto Wiki start page (Main_Page) instead ( bug 33997 )
 209                 $returnToTitle = Title::newFromText( $this->mReturnTo );
 210                 if ( is_object( $returnToTitle )
 211                         && ( $returnToTitle->isSpecial( 'Userlogout' )
 212                                 || $returnToTitle->isSpecial( 'PasswordReset' ) )
 213                 ) {
 214                         $this->mReturnTo = '';
 215                         $this->mReturnToQuery = '';
 216                 }
 217         }
 218
 219         function getDescription() {
 220                 if ( $this->mType === 'signup' ) {
 221                         return $this->msg( 'createaccount' )->text();
 222                 } else {
 223                         return $this->msg( 'login' )->text();
 224                 }
 225         }
 226
 227         /**
 228          * @param string|null $subPage
 229          */
 230         public function execute( $subPage ) {
 231                 if ( session_id() == '' ) {
 232                         wfSetupSession();
 233                 }
 234
 235                 $this->load();
 236
 237                 // Check for [[Special:Userlogin/signup]]. This affects form display and
 238                 // page title.
 239                 if ( $subPage == 'signup' ) {
 240                         $this->mType = 'signup';
 241                 }
 242                 $this->setHeaders();
 243
 244                 // In the case where the user is already logged in, and was redirected to the login form from a
 245                 // page that requires login, do not show the login page. The use case scenario for this is when
 246                 // a user opens a large number of tabs, is redirected to the login page on all of them, and then
 247                 // logs in on one, expecting all the others to work properly.
 248                 //
 249                 // However, do show the form if it was visited intentionally (no 'returnto' is present). People
 250                 // who often switch between several accounts have grown accustomed to this behavior.
 251                 if (
 252                         $this->mType !== 'signup' &&
 253                         !$this->mPosted &&
 254                         $this->getUser()->isLoggedIn() &&
 255                         ( $this->mReturnTo !== '' || $this->mReturnToQuery !== '' )
 256                 ) {
 257                         $this->successfulLogin();
 258                 }
 259
 260                 // If logging in and not on HTTPS, either redirect to it or offer a link.
 261                 global $wgSecureLogin;
 262                 if ( $this->mRequest->getProtocol() !== 'https' ) {
 263                         $title = $this->getFullTitle();
 264                         $query = array(
 265                                 'returnto' => $this->mReturnTo !== '' ? $this->mReturnTo : null,
 266                                 'returntoquery' => $this->mReturnToQuery !== '' ?
 267                                         $this->mReturnToQuery : null,
 268                                 'title' => null,
 269                                 ( $this->mEntryErrorType === 'error' ? 'error' : 'warning' ) => $this->mEntryError,
 270                         ) + $this->mRequest->getQueryValues();
 271                         $url = $title->getFullURL( $query, false, PROTO_HTTPS );
 272                         if ( $wgSecureLogin
 273                                 && wfCanIPUseHTTPS( $this->getRequest()->getIP() )
 274                                 && !$this->mFromHTTP ) // Avoid infinite redirect
 275                         {
 276                                 $url = wfAppendQuery( $url, 'fromhttp=1' );
 277                                 $this->getOutput()->redirect( $url );
 278                                 // Since we only do this redir to change proto, always vary
 279                                 $this->getOutput()->addVaryHeader( 'X-Forwarded-Proto' );
 280
 281                                 return;
 282                         } else {
 283                                 // A wiki without HTTPS login support should set $wgServer to
 284                                 // http://somehost, in which case the secure URL generated
 285                                 // above won't actually start with https://
 286                                 if ( substr( $url, 0, 8 ) === 'https://' ) {
 287                                         $this->mSecureLoginUrl = $url;
 288                                 }
 289                         }
 290                 }
 291
 292                 if ( !is_null( $this->mCookieCheck ) ) {
 293                         $this->onCookieRedirectCheck( $this->mCookieCheck );
 294
 295                         return;
 296                 } elseif ( $this->mPosted ) {
 297                         if ( $this->mCreateaccount ) {
 298                                 $this->addNewAccount();
 299
 300                                 return;
 301                         } elseif ( $this->mCreateaccountMail ) {
 302                                 $this->addNewAccountMailPassword();
 303
 304                                 return;
 305                         } elseif ( ( 'submitlogin' == $this->mAction ) || $this->mLoginattempt ) {
 306                                 $this->processLogin();
 307
 308                                 return;
 309                         }
 310                 }
 311                 $this->mainLoginForm( $this->mEntryError, $this->mEntryErrorType );
 312         }
 313
 314         /**
 315          * @private
 316          */
 317         function addNewAccountMailPassword() {
 318                 if ( $this->mEmail == '' ) {
 319                         $this->mainLoginForm( $this->msg( 'noemailcreate' )->escaped() );
 320
 321                         return;
 322                 }
 323
 324                 $status = $this->addNewAccountInternal();
 325                 if ( !$status->isGood() ) {
 326                         $error = $status->getMessage();
 327                         $this->mainLoginForm( $error->toString() );
 328
 329                         return;
 330                 }
 331
 332                 $u = $status->getValue();
 333
 334                 // Wipe the initial password and mail a temporary one
 335                 $u->setPassword( null );
 336                 $u->saveSettings();
 337                 $result = $this->mailPasswordInternal( $u, false, 'createaccount-title', 'createaccount-text' );
 338
 339                 wfRunHooks( 'AddNewAccount', array( $u, true ) );
 340                 $u->addNewUserLogEntry( 'byemail', $this->mReason );
 341
 342                 $out = $this->getOutput();
 343                 $out->setPageTitle( $this->msg( 'accmailtitle' ) );
 344
 345                 if ( !$result->isGood() ) {
 346                         $this->mainLoginForm( $this->msg( 'mailerror', $result->getWikiText() )->text() );
 347                 } else {
 348                         $out->addWikiMsg( 'accmailtext', $u->getName(), $u->getEmail() );
 349                         $this->executeReturnTo( 'success' );
 350                 }
 351         }
 352
 353         /**
 354          * @private
 355          * @return bool
 356          */
 357         function addNewAccount() {
 358                 global $wgContLang, $wgUser, $wgEmailAuthentication, $wgLoginLanguageSelector;
 359
 360                 # Create the account and abort if there's a problem doing so
 361                 $status = $this->addNewAccountInternal();
 362                 if ( !$status->isGood() ) {
 363                         $error = $status->getMessage();
 364                         $this->mainLoginForm( $error->toString() );
 365
 366                         return false;
 367                 }
 368
 369                 $u = $status->getValue();
 370
 371                 # Only save preferences if the user is not creating an account for someone else.
 372                 if ( $this->getUser()->isAnon() ) {
 373                         # If we showed up language selection links, and one was in use, be
 374                         # smart (and sensible) and save that language as the user's preference
 375                         if ( $wgLoginLanguageSelector && $this->mLanguage ) {
 376                                 $u->setOption( 'language', $this->mLanguage );
 377                         } else {
 378
 379                                 # Otherwise the user's language preference defaults to $wgContLang,
 380                                 # but it may be better to set it to their preferred $wgContLang variant,
 381                                 # based on browser preferences or URL parameters.
 382                                 $u->setOption( 'language', $wgContLang->getPreferredVariant() );
 383                         }
 384                         if ( $wgContLang->hasVariants() ) {
 385                                 $u->setOption( 'variant', $wgContLang->getPreferredVariant() );
 386                         }
 387                 }
 388
 389                 $out = $this->getOutput();
 390
 391                 # Send out an email authentication message if needed
 392                 if ( $wgEmailAuthentication && Sanitizer::validateEmail( $u->getEmail() ) ) {
 393                         $status = $u->sendConfirmationMail();
 394                         if ( $status->isGood() ) {
 395                                 $out->addWikiMsg( 'confirmemail_oncreate' );
 396                         } else {
 397                                 $out->addWikiText( $status->getWikiText( 'confirmemail_sendfailed' ) );
 398                         }
 399                 }
 400
 401                 # Save settings (including confirmation token)
 402                 $u->saveSettings();
 403
 404                 # If not logged in, assume the new account as the current one and set
 405                 # session cookies then show a "welcome" message or a "need cookies"
 406                 # message as needed
 407                 if ( $this->getUser()->isAnon() ) {
 408                         $u->setCookies();
 409                         $wgUser = $u;
 410                         // This should set it for OutputPage and the Skin
 411                         // which is needed or the personal links will be
 412                         // wrong.
 413                         $this->getContext()->setUser( $u );
 414                         wfRunHooks( 'AddNewAccount', array( $u, false ) );
 415                         $u->addNewUserLogEntry( 'create' );
 416                         if ( $this->hasSessionCookie() ) {
 417                                 $this->successfulCreation();
 418                         } else {
 419                                 $this->cookieRedirectCheck( 'new' );
 420                         }
 421                 } else {
 422                         # Confirm that the account was created
 423                         $out->setPageTitle( $this->msg( 'accountcreated' ) );
 424                         $out->addWikiMsg( 'accountcreatedtext', $u->getName() );
 425                         $out->addReturnTo( $this->getPageTitle() );
 426                         wfRunHooks( 'AddNewAccount', array( $u, false ) );
 427                         $u->addNewUserLogEntry( 'create2', $this->mReason );
 428                 }
 429
 430                 return true;
 431         }
 432
 433         /**
 434          * Make a new user account using the loaded data.
 435          * @private
 436          * @throws PermissionsError|ReadOnlyError
 437          * @return Status
 438          */
 439         public function addNewAccountInternal() {
 440                 global $wgAuth, $wgMemc, $wgAccountCreationThrottle,
 441                         $wgMinimalPasswordLength, $wgEmailConfirmToEdit;
 442
 443                 // If the user passes an invalid domain, something is fishy
 444                 if ( !$wgAuth->validDomain( $this->mDomain ) ) {
 445                         return Status::newFatal( 'wrongpassword' );
 446                 }
 447
 448                 // If we are not allowing users to login locally, we should be checking
 449                 // to see if the user is actually able to authenticate to the authenti-
 450                 // cation server before they create an account (otherwise, they can
 451                 // create a local account and login as any domain user). We only need
 452                 // to check this for domains that aren't local.
 453                 if ( 'local' != $this->mDomain && $this->mDomain != '' ) {
 454                         if (
 455                                 !$wgAuth->canCreateAccounts() &&
 456                                 (
 457                                         !$wgAuth->userExists( $this->mUsername ) ||
 458                                         !$wgAuth->authenticate( $this->mUsername, $this->mPassword )
 459                                 )
 460                         ) {
 461                                 return Status::newFatal( 'wrongpassword' );
 462                         }
 463                 }
 464
 465                 if ( wfReadOnly() ) {
 466                         throw new ReadOnlyError;
 467                 }
 468
 469                 # Request forgery checks.
 470                 if ( !self::getCreateaccountToken() ) {
 471                         self::setCreateaccountToken();
 472
 473                         return Status::newFatal( 'nocookiesfornew' );
 474                 }
 475
 476                 # The user didn't pass a createaccount token
 477                 if ( !$this->mToken ) {
 478                         return Status::newFatal( 'sessionfailure' );
 479                 }
 480
 481                 # Validate the createaccount token
 482                 if ( $this->mToken !== self::getCreateaccountToken() ) {
 483                         return Status::newFatal( 'sessionfailure' );
 484                 }
 485
 486                 # Check permissions
 487                 $currentUser = $this->getUser();
 488                 $creationBlock = $currentUser->isBlockedFromCreateAccount();
 489                 if ( !$currentUser->isAllowed( 'createaccount' ) ) {
 490                         throw new PermissionsError( 'createaccount' );
 491                 } elseif ( $creationBlock instanceof Block ) {
 492                         // Throws an ErrorPageError.
 493                         $this->userBlockedMessage( $creationBlock );
 494
 495                         // This should never be reached.
 496                         return false;
 497                 }
 498
 499                 # Include checks that will include GlobalBlocking (Bug 38333)
 500                 $permErrors = $this->getPageTitle()->getUserPermissionsErrors(
 501                         'createaccount',
 502                         $currentUser,
 503                         true
 504                 );
 505
 506                 if ( count( $permErrors ) ) {
 507                         throw new PermissionsError( 'createaccount', $permErrors );
 508                 }
 509
 510                 $ip = $this->getRequest()->getIP();
 511                 if ( $currentUser->isDnsBlacklisted( $ip, true /* check $wgProxyWhitelist */ ) ) {
 512                         return Status::newFatal( 'sorbs_create_account_reason' );
 513                 }
 514
 515                 // Normalize the name so that silly things don't cause "invalid username"
 516                 // errors. User::newFromName does some rather strict checking, rejecting
 517                 // e.g. leading/trailing/multiple spaces. But first we need to reject
 518                 // usernames that would be treated as titles with a fragment part.
 519                 if ( strpos( $this->mUsername, '#' ) !== false ) {
 520                         return Status::newFatal( 'noname' );
 521                 }
 522                 $title = Title::makeTitleSafe( NS_USER, $this->mUsername );
 523                 if ( !is_object( $title ) ) {
 524                         return Status::newFatal( 'noname' );
 525                 }
 526
 527                 # Now create a dummy user ($u) and check if it is valid
 528                 $u = User::newFromName( $title->getText(), 'creatable' );
 529                 if ( !is_object( $u ) ) {
 530                         return Status::newFatal( 'noname' );
 531                 } elseif ( 0 != $u->idForName() ) {
 532                         return Status::newFatal( 'userexists' );
 533                 }
 534
 535                 if ( $this->mCreateaccountMail ) {
 536                         # do not force a password for account creation by email
 537                         # set invalid password, it will be replaced later by a random generated password
 538                         $this->mPassword = null;
 539                 } else {
 540                         if ( $this->mPassword !== $this->mRetype ) {
 541                                 return Status::newFatal( 'badretype' );
 542                         }
 543
 544                         # check for minimal password length
 545                         $valid = $u->getPasswordValidity( $this->mPassword );
 546                         if ( $valid !== true ) {
 547                                 if ( !is_array( $valid ) ) {
 548                                         $valid = array( $valid, $wgMinimalPasswordLength );
 549                                 }
 550
 551                                 return call_user_func_array( 'Status::newFatal', $valid );
 552                         }
 553                 }
 554
 555                 # if you need a confirmed email address to edit, then obviously you
 556                 # need an email address.
 557                 if ( $wgEmailConfirmToEdit && strval( $this->mEmail ) === '' ) {
 558                         return Status::newFatal( 'noemailtitle' );
 559                 }
 560
 561                 if ( strval( $this->mEmail ) !== '' && !Sanitizer::validateEmail( $this->mEmail ) ) {
 562                         return Status::newFatal( 'invalidemailaddress' );
 563                 }
 564
 565                 # Set some additional data so the AbortNewAccount hook can be used for
 566                 # more than just username validation
 567                 $u->setEmail( $this->mEmail );
 568                 $u->setRealName( $this->mRealName );
 569
 570                 $abortError = '';
 571                 $abortStatus = null;
 572                 if ( !wfRunHooks( 'AbortNewAccount', array( $u, &$abortError, &$abortStatus ) ) ) {
 573                         // Hook point to add extra creation throttles and blocks
 574                         wfDebug( "LoginForm::addNewAccountInternal: a hook blocked creation\n" );
 575                         if ( $abortStatus === null ) {
 576                                 // Report back the old string as a raw message status.
 577                                 // This will report the error back as 'createaccount-hook-aborted'
 578                                 // with the given string as the message.
 579                                 // To return a different error code, return a Status object.
 580                                 $abortError = new Message( 'createaccount-hook-aborted', array( $abortError ) );
 581                                 $abortError->text();
 582
 583                                 return Status::newFatal( $abortError );
 584                         } else {
 585                                 // For MediaWiki 1.23+ and updated hooks, return the Status object
 586                                 // returned from the hook.
 587                                 return $abortStatus;
 588                         }
 589                 }
 590
 591                 // Hook point to check for exempt from account creation throttle
 592                 if ( !wfRunHooks( 'ExemptFromAccountCreationThrottle', array( $ip ) ) ) {
 593                         wfDebug( "LoginForm::exemptFromAccountCreationThrottle: a hook " .
 594                                 "allowed account creation w/o throttle\n" );
 595                 } else {
 596                         if ( ( $wgAccountCreationThrottle && $currentUser->isPingLimitable() ) ) {
 597                                 $key = wfMemcKey( 'acctcreate', 'ip', $ip );
 598                                 $value = $wgMemc->get( $key );
 599                                 if ( !$value ) {
 600                                         $wgMemc->set( $key, 0, 86400 );
 601                                 }
 602                                 if ( $value >= $wgAccountCreationThrottle ) {
 603                                         return Status::newFatal( 'acct_creation_throttle_hit', $wgAccountCreationThrottle );
 604                                 }
 605                                 $wgMemc->incr( $key );
 606                         }
 607                 }
 608
 609                 if ( !$wgAuth->addUser( $u, $this->mPassword, $this->mEmail, $this->mRealName ) ) {
 610                         return Status::newFatal( 'externaldberror' );
 611                 }
 612
 613                 self::clearCreateaccountToken();
 614
 615                 return $this->initUser( $u, false );
 616         }
 617
 618         /**
 619          * Actually add a user to the database.
 620          * Give it a User object that has been initialised with a name.
 621          *
 622          * @param User $u
 623          * @param bool $autocreate True if this is an autocreation via auth plugin
 624          * @return Status Status object, with the User object in the value member on success
 625          * @private
 626          */
 627         function initUser( $u, $autocreate ) {
 628                 global $wgAuth;
 629
 630                 $status = $u->addToDatabase();
 631                 if ( !$status->isOK() ) {
 632                         return $status;
 633                 }
 634
 635                 if ( $wgAuth->allowPasswordChange() ) {
 636                         $u->setPassword( $this->mPassword );
 637                 }
 638
 639                 $u->setEmail( $this->mEmail );
 640                 $u->setRealName( $this->mRealName );
 641                 $u->setToken();
 642
 643                 $wgAuth->initUser( $u, $autocreate );
 644
 645                 $u->saveSettings();
 646
 647                 // Update user count
 648                 DeferredUpdates::addUpdate( new SiteStatsUpdate( 0, 0, 0, 0, 1 ) );
 649
 650                 // Watch user's userpage and talk page
 651                 $u->addWatch( $u->getUserPage(), WatchedItem::IGNORE_USER_RIGHTS );
 652
 653                 return Status::newGood( $u );
 654         }
 655
 656         /**
 657          * Internally authenticate the login request.
 658          *
 659          * This may create a local account as a side effect if the
 660          * authentication plugin allows transparent local account
 661          * creation.
 662          * @return int
 663          */
 664         public function authenticateUserData() {
 665                 global $wgUser, $wgAuth;
 666
 667                 $this->load();
 668
 669                 if ( $this->mUsername == '' ) {
 670                         return self::NO_NAME;
 671                 }
 672
 673                 // We require a login token to prevent login CSRF
 674                 // Handle part of this before incrementing the throttle so
 675                 // token-less login attempts don't count towards the throttle
 676                 // but wrong-token attempts do.
 677
 678                 // If the user doesn't have a login token yet, set one.
 679                 if ( !self::getLoginToken() ) {
 680                         self::setLoginToken();
 681
 682                         return self::NEED_TOKEN;
 683                 }
 684                 // If the user didn't pass a login token, tell them we need one
 685                 if ( !$this->mToken ) {
 686                         return self::NEED_TOKEN;
 687                 }
 688
 689                 $throttleCount = self::incLoginThrottle( $this->mUsername );
 690                 if ( $throttleCount === true ) {
 691                         return self::THROTTLED;
 692                 }
 693
 694                 // Validate the login token
 695                 if ( $this->mToken !== self::getLoginToken() ) {
 696                         return self::WRONG_TOKEN;
 697                 }
 698
 699                 // Load the current user now, and check to see if we're logging in as
 700                 // the same name. This is necessary because loading the current user
 701                 // (say by calling getName()) calls the UserLoadFromSession hook, which
 702                 // potentially creates the user in the database. Until we load $wgUser,
 703                 // checking for user existence using User::newFromName($name)->getId() below
 704                 // will effectively be using stale data.
 705                 if ( $this->getUser()->getName() === $this->mUsername ) {
 706                         wfDebug( __METHOD__ . ": already logged in as {$this->mUsername}\n" );
 707
 708                         return self::SUCCESS;
 709                 }
 710
 711                 $u = User::newFromName( $this->mUsername );
 712
 713                 // Give extensions a way to indicate the username has been updated,
 714                 // rather than telling the user the account doesn't exist.
 715                 if ( !wfRunHooks( 'LoginUserMigrated', array( $u, &$msg ) ) ) {
 716                         $this->mAbortLoginErrorMsg = $msg;
 717                         return self::USER_MIGRATED;
 718                 }
 719
 720                 if ( !( $u instanceof User ) || !User::isUsableName( $u->getName() ) ) {
 721                         return self::ILLEGAL;
 722                 }
 723
 724                 $isAutoCreated = false;
 725                 if ( $u->getID() == 0 ) {
 726                         $status = $this->attemptAutoCreate( $u );
 727                         if ( $status !== self::SUCCESS ) {
 728                                 return $status;
 729                         } else {
 730                                 $isAutoCreated = true;
 731                         }
 732                 } else {
 733                         $u->load();
 734                 }
 735
 736                 // Give general extensions, such as a captcha, a chance to abort logins
 737                 $abort = self::ABORTED;
 738                 $msg = null;
 739                 if ( !wfRunHooks( 'AbortLogin', array( $u, $this->mPassword, &$abort, &$msg ) ) ) {
 740                         $this->mAbortLoginErrorMsg = $msg;
 741
 742                         return $abort;
 743                 }
 744
 745                 global $wgBlockDisablesLogin;
 746                 if ( !$u->checkPassword( $this->mPassword ) ) {
 747                         if ( $u->checkTemporaryPassword( $this->mPassword ) ) {
 748                                 // The e-mailed temporary password should not be used for actu-
 749                                 // al logins; that's a very sloppy habit, and insecure if an
 750                                 // attacker has a few seconds to click "search" on someone's o-
 751                                 // pen mail reader.
 752                                 //
 753                                 // Allow it to be used only to reset the password a single time
 754                                 // to a new value, which won't be in the user's e-mail ar-
 755                                 // chives.
 756                                 //
 757                                 // For backwards compatibility, we'll still recognize it at the
 758                                 // login form to minimize surprises for people who have been
 759                                 // logging in with a temporary password for some time.
 760                                 //
 761                                 // As a side-effect, we can authenticate the user's e-mail ad-
 762                                 // dress if it's not already done, since the temporary password
 763                                 // was sent via e-mail.
 764                                 if ( !$u->isEmailConfirmed() ) {
 765                                         $u->confirmEmail();
 766                                         $u->saveSettings();
 767                                 }
 768
 769                                 // At this point we just return an appropriate code/ indicating
 770                                 // that the UI should show a password reset form; bot inter-
 771                                 // faces etc will probably just fail cleanly here.
 772                                 $this->mAbortLoginErrorMsg = 'resetpass-temp-emailed';
 773                                 $this->mTempPasswordUsed = true;
 774                                 $retval = self::RESET_PASS;
 775                         } else {
 776                                 $retval = ( $this->mPassword == '' ) ? self::EMPTY_PASS : self::WRONG_PASS;
 777                         }
 778                 } elseif ( $wgBlockDisablesLogin && $u->isBlocked() ) {
 779                         // If we've enabled it, make it so that a blocked user cannot login
 780                         $retval = self::USER_BLOCKED;
 781                 } elseif ( $u->getPasswordExpired() == 'hard' ) {
 782                         // Force reset now, without logging in
 783                         $retval = self::RESET_PASS;
 784                         $this->mAbortLoginErrorMsg = 'resetpass-expired';
 785                 } else {
 786                         $wgAuth->updateUser( $u );
 787                         $wgUser = $u;
 788                         // This should set it for OutputPage and the Skin
 789                         // which is needed or the personal links will be
 790                         // wrong.
 791                         $this->getContext()->setUser( $u );
 792
 793                         // Please reset throttle for successful logins, thanks!
 794                         if ( $throttleCount ) {
 795                                 self::clearLoginThrottle( $this->mUsername );
 796                         }
 797
 798                         if ( $isAutoCreated ) {
 799                                 // Must be run after $wgUser is set, for correct new user log
 800                                 wfRunHooks( 'AuthPluginAutoCreate', array( $u ) );
 801                         }
 802
 803                         $retval = self::SUCCESS;
 804                 }
 805                 wfRunHooks( 'LoginAuthenticateAudit', array( $u, $this->mPassword, $retval ) );
 806
 807                 return $retval;
 808         }
 809
 810         /**
 811          * Increment the login attempt throttle hit count for the (username,current IP)
 812          * tuple unless the throttle was already reached.
 813          * @param string $username The user name
 814          * @return bool|int The integer hit count or True if it is already at the limit
 815          */
 816         public static function incLoginThrottle( $username ) {
 817                 global $wgPasswordAttemptThrottle, $wgMemc, $wgRequest;
 818                 $username = trim( $username ); // sanity
 819
 820                 $throttleCount = 0;
 821                 if ( is_array( $wgPasswordAttemptThrottle ) ) {
 822                         $throttleKey = wfMemcKey( 'password-throttle', $wgRequest->getIP(), md5( $username ) );
 823                         $count = $wgPasswordAttemptThrottle['count'];
 824                         $period = $wgPasswordAttemptThrottle['seconds'];
 825
 826                         $throttleCount = $wgMemc->get( $throttleKey );
 827                         if ( !$throttleCount ) {
 828                                 $wgMemc->add( $throttleKey, 1, $period ); // start counter
 829                         } elseif ( $throttleCount < $count ) {
 830                                 $wgMemc->incr( $throttleKey );
 831                         } elseif ( $throttleCount >= $count ) {
 832                                 return true;
 833                         }
 834                 }
 835
 836                 return $throttleCount;
 837         }
 838
 839         /**
 840          * Clear the login attempt throttle hit count for the (username,current IP) tuple.
 841          * @param string $username The user name
 842          * @return void
 843          */
 844         public static function clearLoginThrottle( $username ) {
 845                 global $wgMemc, $wgRequest;
 846                 $username = trim( $username ); // sanity
 847
 848                 $throttleKey = wfMemcKey( 'password-throttle', $wgRequest->getIP(), md5( $username ) );
 849                 $wgMemc->delete( $throttleKey );
 850         }
 851
 852         /**
 853          * Attempt to automatically create a user on login. Only succeeds if there
 854          * is an external authentication method which allows it.
 855          *
 856          * @param User $user
 857          *
 858          * @return int Status code
 859          */
 860         function attemptAutoCreate( $user ) {
 861                 global $wgAuth;
 862
 863                 if ( $this->getUser()->isBlockedFromCreateAccount() ) {
 864                         wfDebug( __METHOD__ . ": user is blocked from account creation\n" );
 865
 866                         return self::CREATE_BLOCKED;
 867                 }
 868
 869                 if ( !$wgAuth->autoCreate() ) {
 870                         return self::NOT_EXISTS;
 871                 }
 872
 873                 if ( !$wgAuth->userExists( $user->getName() ) ) {
 874                         wfDebug( __METHOD__ . ": user does not exist\n" );
 875
 876                         return self::NOT_EXISTS;
 877                 }
 878
 879                 if ( !$wgAuth->authenticate( $user->getName(), $this->mPassword ) ) {
 880                         wfDebug( __METHOD__ . ": \$wgAuth->authenticate() returned false, aborting\n" );
 881
 882                         return self::WRONG_PLUGIN_PASS;
 883                 }
 884
 885                 $abortError = '';
 886                 if ( !wfRunHooks( 'AbortAutoAccount', array( $user, &$abortError ) ) ) {
 887                         // Hook point to add extra creation throttles and blocks
 888                         wfDebug( "LoginForm::attemptAutoCreate: a hook blocked creation: $abortError\n" );
 889                         $this->mAbortLoginErrorMsg = $abortError;
 890
 891                         return self::ABORTED;
 892                 }
 893
 894                 wfDebug( __METHOD__ . ": creating account\n" );
 895                 $status = $this->initUser( $user, true );
 896
 897                 if ( !$status->isOK() ) {
 898                         $errors = $status->getErrorsByType( 'error' );
 899                         $this->mAbortLoginErrorMsg = $errors[0]['message'];
 900
 901                         return self::ABORTED;
 902                 }
 903
 904                 return self::SUCCESS;
 905         }
 906
 907         function processLogin() {
 908                 global $wgMemc, $wgLang, $wgSecureLogin, $wgPasswordAttemptThrottle,
 909                         $wgInvalidPasswordReset;
 910
 911                 switch ( $this->authenticateUserData() ) {
 912                         case self::SUCCESS:
 913                                 # We've verified now, update the real record
 914                                 $user = $this->getUser();
 915                                 $user->invalidateCache();
 916
 917                                 if ( $user->requiresHTTPS() ) {
 918                                         $this->mStickHTTPS = true;
 919                                 }
 920
 921                                 if ( $wgSecureLogin && !$this->mStickHTTPS ) {
 922                                         $user->setCookies( $this->mRequest, false, $this->mRemember );
 923                                 } else {
 924                                         $user->setCookies( $this->mRequest, null, $this->mRemember );
 925                                 }
 926                                 self::clearLoginToken();
 927
 928                                 // Reset the throttle
 929                                 $request = $this->getRequest();
 930                                 $key = wfMemcKey( 'password-throttle', $request->getIP(), md5( $this->mUsername ) );
 931                                 $wgMemc->delete( $key );
 932
 933                                 if ( $this->hasSessionCookie() || $this->mSkipCookieCheck ) {
 934                                         /* Replace the language object to provide user interface in
 935                                          * correct language immediately on this first page load.
 936                                          */
 937                                         $code = $request->getVal( 'uselang', $user->getOption( 'language' ) );
 938                                         $userLang = Language::factory( $code );
 939                                         $wgLang = $userLang;
 940                                         $this->getContext()->setLanguage( $userLang );
 941                                         // Reset SessionID on Successful login (bug 40995)
 942                                         $this->renewSessionId();
 943                                         if ( $this->getUser()->getPasswordExpired() == 'soft' ) {
 944                                                 $this->resetLoginForm( $this->msg( 'resetpass-expired-soft' ) );
 945                                         } elseif ( $wgInvalidPasswordReset
 946                                                 && !$user->isValidPassword( $this->mPassword )
 947                                         ) {
 948                                                 $status = $user->checkPasswordValidity( $this->mPassword );
 949                                                 $this->resetLoginForm(
 950                                                         $status->getMessage( 'resetpass-validity-soft' )
 951                                                 );
 952                                         } else {
 953                                                 $this->successfulLogin();
 954                                         }
 955                                 } else {
 956                                         $this->cookieRedirectCheck( 'login' );
 957                                 }
 958                                 break;
 959
 960                         case self::NEED_TOKEN:
 961                                 $error = $this->mAbortLoginErrorMsg ?: 'nocookiesforlogin';
 962                                 $this->mainLoginForm( $this->msg( $error )->parse() );
 963                                 break;
 964                         case self::WRONG_TOKEN:
 965                                 $error = $this->mAbortLoginErrorMsg ?: 'sessionfailure';
 966                                 $this->mainLoginForm( $this->msg( $error )->text() );
 967                                 break;
 968                         case self::NO_NAME:
 969                         case self::ILLEGAL:
 970                                 $error = $this->mAbortLoginErrorMsg ?: 'noname';
 971                                 $this->mainLoginForm( $this->msg( $error )->text() );
 972                                 break;
 973                         case self::WRONG_PLUGIN_PASS:
 974                                 $error = $this->mAbortLoginErrorMsg ?: 'wrongpassword';
 975                                 $this->mainLoginForm( $this->msg( $error )->text() );
 976                                 break;
 977                         case self::NOT_EXISTS:
 978                                 if ( $this->getUser()->isAllowed( 'createaccount' ) ) {
 979                                         $error = $this->mAbortLoginErrorMsg ?: 'nosuchuser';
 980                                         $this->mainLoginForm( $this->msg( $error,
 981                                                 wfEscapeWikiText( $this->mUsername ) )->parse() );
 982                                 } else {
 983                                         $error = $this->mAbortLoginErrorMsg ?: 'nosuchusershort';
 984                                         $this->mainLoginForm( $this->msg( $error,
 985                                                 wfEscapeWikiText( $this->mUsername ) )->text() );
 986                                 }
 987                                 break;
 988                         case self::WRONG_PASS:
 989                                 $error = $this->mAbortLoginErrorMsg ?: 'wrongpassword';
 990                                 $this->mainLoginForm( $this->msg( $error )->text() );
 991                                 break;
 992                         case self::EMPTY_PASS:
 993                                 $error = $this->mAbortLoginErrorMsg ?: 'wrongpasswordempty';
 994                                 $this->mainLoginForm( $this->msg( $error )->text() );
 995                                 break;
 996                         case self::RESET_PASS:
 997                                 $error = $this->mAbortLoginErrorMsg ?: 'resetpass_announce';
 998                                 $this->resetLoginForm( $this->msg( $error ) );
 999                                 break;
1000                         case self::CREATE_BLOCKED:
1001                                 $this->userBlockedMessage( $this->getUser()->isBlockedFromCreateAccount() );
1002                                 break;
1003                         case self::THROTTLED:
1004                                 $error = $this->mAbortLoginErrorMsg ?: 'login-throttled';
1005                                 $this->mainLoginForm( $this->msg( $error )
1006                                         ->params( $this->getLanguage()->formatDuration( $wgPasswordAttemptThrottle['seconds'] ) )
1007                                         ->text()
1008                                 );
1009                                 break;
1010                         case self::USER_BLOCKED:
1011                                 $error = $this->mAbortLoginErrorMsg ?: 'login-userblocked';
1012                                 $this->mainLoginForm( $this->msg( $error, $this->mUsername )->escaped() );
1013                                 break;
1014                         case self::ABORTED:
1015                                 $error = $this->mAbortLoginErrorMsg ?: 'login-abort-generic';
1016                                 $this->mainLoginForm( $this->msg( $error,
1017                                                 wfEscapeWikiText( $this->mUsername ) )->text() );
1018                                 break;
1019                         case self::USER_MIGRATED:
1020                                 $error = $this->mAbortLoginErrorMsg ?: 'login-migrated-generic';
1021                                 $params = array();
1022                                 if ( is_array( $error ) ) {
1023                                         $error = array_shift( $this->mAbortLoginErrorMsg );
1024                                         $params = $this->mAbortLoginErrorMsg;
1025                                 }
1026                                 $this->mainLoginForm( $this->msg( $error, $params )->text() );
1027                                 break;
1028                         default:
1029                                 throw new MWException( 'Unhandled case value' );
1030                 }
1031         }
1032
1033         /**
1034          * Show the Special:ChangePassword form, with custom message
1035          * @param Message $msg
1036          */
1037         protected function resetLoginForm( Message $msg ) {
1038                 // Allow hooks to explain this password reset in more detail
1039                 wfRunHooks( 'LoginPasswordResetMessage', array( &$msg, $this->mUsername ) );
1040                 $reset = new SpecialChangePassword();
1041                 $derivative = new DerivativeContext( $this->getContext() );
1042                 $derivative->setTitle( $reset->getPageTitle() );
1043                 $reset->setContext( $derivative );
1044                 if ( !$this->mTempPasswordUsed ) {
1045                         $reset->setOldPasswordMessage( 'oldpassword' );
1046                 }
1047                 $reset->setChangeMessage( $msg );
1048                 $reset->execute( null );
1049         }
1050
1051         /**
1052          * @param User $u
1053          * @param bool $throttle
1054          * @param string $emailTitle Message name of email title
1055          * @param string $emailText Message name of email text
1056          * @return Status
1057          */
1058         function mailPasswordInternal( $u, $throttle = true, $emailTitle = 'passwordremindertitle',
1059                 $emailText = 'passwordremindertext'
1060         ) {
1061                 global $wgNewPasswordExpiry;
1062
1063                 if ( $u->getEmail() == '' ) {
1064                         return Status::newFatal( 'noemail', $u->getName() );
1065                 }
1066                 $ip = $this->getRequest()->getIP();
1067                 if ( !$ip ) {
1068                         return Status::newFatal( 'badipaddress' );
1069                 }
1070
1071                 $currentUser = $this->getUser();
1072                 wfRunHooks( 'User::mailPasswordInternal', array( &$currentUser, &$ip, &$u ) );
1073
1074                 $np = $u->randomPassword();
1075                 $u->setNewpassword( $np, $throttle );
1076                 $u->saveSettings();
1077                 $userLanguage = $u->getOption( 'language' );
1078
1079                 $mainPage = Title::newMainPage();
1080                 $mainPageUrl = $mainPage->getCanonicalURL();
1081
1082                 $m = $this->msg( $emailText, $ip, $u->getName(), $np, '<' . $mainPageUrl . '>',
1083                         round( $wgNewPasswordExpiry / 86400 ) )->inLanguage( $userLanguage )->text();
1084                 $result = $u->sendMail( $this->msg( $emailTitle )->inLanguage( $userLanguage )->text(), $m );
1085
1086                 return $result;
1087         }
1088
1089         /**
1090          * Run any hooks registered for logins, then HTTP redirect to
1091          * $this->mReturnTo (or Main Page if that's undefined).  Formerly we had a
1092          * nice message here, but that's really not as useful as just being sent to
1093          * wherever you logged in from.  It should be clear that the action was
1094          * successful, given the lack of error messages plus the appearance of your
1095          * name in the upper right.
1096          *
1097          * @private
1098          */
1099         function successfulLogin() {
1100                 # Run any hooks; display injected HTML if any, else redirect
1101                 $currentUser = $this->getUser();
1102                 $injected_html = '';
1103                 wfRunHooks( 'UserLoginComplete', array( &$currentUser, &$injected_html ) );
1104
1105                 if ( $injected_html !== '' ) {
1106                         $this->displaySuccessfulAction( 'success', $this->msg( 'loginsuccesstitle' ),
1107                                 'loginsuccess', $injected_html );
1108                 } else {
1109                         $this->executeReturnTo( 'successredirect' );
1110                 }
1111         }
1112
1113         /**
1114          * Run any hooks registered for logins, then display a message welcoming
1115          * the user.
1116          *
1117          * @private
1118          */
1119         function successfulCreation() {
1120                 # Run any hooks; display injected HTML
1121                 $currentUser = $this->getUser();
1122                 $injected_html = '';
1123                 $welcome_creation_msg = 'welcomecreation-msg';
1124
1125                 wfRunHooks( 'UserLoginComplete', array( &$currentUser, &$injected_html ) );
1126
1127                 /**
1128                  * Let any extensions change what message is shown.
1129                  * @see https://www.mediawiki.org/wiki/Manual:Hooks/BeforeWelcomeCreation
1130                  * @since 1.18
1131                  */
1132                 wfRunHooks( 'BeforeWelcomeCreation', array( &$welcome_creation_msg, &$injected_html ) );
1133
1134                 $this->displaySuccessfulAction(
1135                         'signup',
1136                         $this->msg( 'welcomeuser', $this->getUser()->getName() ),
1137                         $welcome_creation_msg, $injected_html
1138                 );
1139         }
1140
1141         /**
1142          * Display a "successful action" page.
1143          *
1144          * @param string $type Condition of return to; see `executeReturnTo`
1145          * @param string|Message $title Page's title
1146          * @param string $msgname
1147          * @param string $injected_html
1148          */
1149         private function displaySuccessfulAction( $type, $title, $msgname, $injected_html ) {
1150                 $out = $this->getOutput();
1151                 $out->setPageTitle( $title );
1152                 if ( $msgname ) {
1153                         $out->addWikiMsg( $msgname, wfEscapeWikiText( $this->getUser()->getName() ) );
1154                 }
1155
1156                 $out->addHTML( $injected_html );
1157
1158                 $this->executeReturnTo( $type );
1159         }
1160
1161         /**
1162          * Output a message that informs the user that they cannot create an account because
1163          * there is a block on them or their IP which prevents account creation.  Note that
1164          * User::isBlockedFromCreateAccount(), which gets this block, ignores the 'hardblock'
1165          * setting on blocks (bug 13611).
1166          * @param Block $block The block causing this error
1167          * @throws ErrorPageError
1168          */
1169         function userBlockedMessage( Block $block ) {
1170                 # Let's be nice about this, it's likely that this feature will be used
1171                 # for blocking large numbers of innocent people, e.g. range blocks on
1172                 # schools. Don't blame it on the user. There's a small chance that it
1173                 # really is the user's fault, i.e. the username is blocked and they
1174                 # haven't bothered to log out before trying to create an account to
1175                 # evade it, but we'll leave that to their guilty conscience to figure
1176                 # out.
1177                 $errorParams = array(
1178                         $block->getTarget(),
1179                         $block->mReason ? $block->mReason : $this->msg( 'blockednoreason' )->text(),
1180                         $block->getByName()
1181                 );
1182
1183                 if ( $block->getType() === Block::TYPE_RANGE ) {
1184                         $errorMessage = 'cantcreateaccount-range-text';
1185                         $errorParams[] = $this->getRequest()->getIP();
1186                 } else {
1187                         $errorMessage = 'cantcreateaccount-text';
1188                 }
1189
1190                 throw new ErrorPageError(
1191                         'cantcreateaccounttitle',
1192                         $errorMessage,
1193                         $errorParams
1194                 );
1195         }
1196
1197         /**
1198          * Add a "return to" link or redirect to it.
1199          * Extensions can use this to reuse the "return to" logic after
1200          * inject steps (such as redirection) into the login process.
1201          *
1202          * @param string $type One of the following:
1203          *    - error: display a return to link ignoring $wgRedirectOnLogin
1204          *    - signup: display a return to link using $wgRedirectOnLogin if needed
1205          *    - success: display a return to link using $wgRedirectOnLogin if needed
1206          *    - successredirect: send an HTTP redirect using $wgRedirectOnLogin if needed
1207          * @param string $returnTo
1208          * @param array|string $returnToQuery
1209          * @param bool $stickHTTPs Keep redirect link on HTTPs
1210          * @since 1.22
1211          */
1212         public function showReturnToPage(
1213                 $type, $returnTo = '', $returnToQuery = '', $stickHTTPs = false
1214         ) {
1215                 $this->mReturnTo = $returnTo;
1216                 $this->mReturnToQuery = $returnToQuery;
1217                 $this->mStickHTTPS = $stickHTTPs;
1218                 $this->executeReturnTo( $type );
1219         }
1220
1221         /**
1222          * Add a "return to" link or redirect to it.
1223          *
1224          * @param string $type One of the following:
1225          *    - error: display a return to link ignoring $wgRedirectOnLogin
1226          *    - signup: display a return to link using $wgRedirectOnLogin if needed
1227          *    - success: display a return to link using $wgRedirectOnLogin if needed
1228          *    - successredirect: send an HTTP redirect using $wgRedirectOnLogin if needed
1229          */
1230         private function executeReturnTo( $type ) {
1231                 global $wgRedirectOnLogin, $wgSecureLogin;
1232
1233                 if ( $type != 'error' && $wgRedirectOnLogin !== null ) {
1234                         $returnTo = $wgRedirectOnLogin;
1235                         $returnToQuery = array();
1236                 } else {
1237                         $returnTo = $this->mReturnTo;
1238                         $returnToQuery = wfCgiToArray( $this->mReturnToQuery );
1239                 }
1240
1241                 // Allow modification of redirect behavior
1242                 wfRunHooks( 'PostLoginRedirect', array( &$returnTo, &$returnToQuery, &$type ) );
1243
1244                 $returnToTitle = Title::newFromText( $returnTo );
1245                 if ( !$returnToTitle ) {
1246                         $returnToTitle = Title::newMainPage();
1247                 }
1248
1249                 if ( $wgSecureLogin && !$this->mStickHTTPS ) {
1250                         $options = array( 'http' );
1251                         $proto = PROTO_HTTP;
1252                 } elseif ( $wgSecureLogin ) {
1253                         $options = array( 'https' );
1254                         $proto = PROTO_HTTPS;
1255                 } else {
1256                         $options = array();
1257                         $proto = PROTO_RELATIVE;
1258                 }
1259
1260                 if ( $type == 'successredirect' ) {
1261                         $redirectUrl = $returnToTitle->getFullURL( $returnToQuery, false, $proto );
1262                         $this->getOutput()->redirect( $redirectUrl );
1263                 } else {
1264                         $this->getOutput()->addReturnTo( $returnToTitle, $returnToQuery, null, $options );
1265                 }
1266         }
1267
1268         /**
1269          * @param string $msg
1270          * @param string $msgtype
1271          * @private
1272          */
1273         function mainLoginForm( $msg, $msgtype = 'error' ) {
1274                 global $wgEnableEmail, $wgEnableUserEmail;
1275                 global $wgHiddenPrefs, $wgLoginLanguageSelector;
1276                 global $wgAuth, $wgEmailConfirmToEdit, $wgCookieExpiration;
1277                 global $wgSecureLogin, $wgPasswordResetRoutes;
1278
1279                 $titleObj = $this->getPageTitle();
1280                 $user = $this->getUser();
1281                 $out = $this->getOutput();
1282
1283                 if ( $this->mType == 'signup' ) {
1284                         // Block signup here if in readonly. Keeps user from
1285                         // going through the process (filling out data, etc)
1286                         // and being informed later.
1287                         $permErrors = $titleObj->getUserPermissionsErrors( 'createaccount', $user, true );
1288                         if ( count( $permErrors ) ) {
1289                                 throw new PermissionsError( 'createaccount', $permErrors );
1290                         } elseif ( $user->isBlockedFromCreateAccount() ) {
1291                                 $this->userBlockedMessage( $user->isBlockedFromCreateAccount() );
1292
1293                                 return;
1294                         } elseif ( wfReadOnly() ) {
1295                                 throw new ReadOnlyError;
1296                         }
1297                 }
1298
1299                 // Pre-fill username (if not creating an account, bug 44775).
1300                 if ( $this->mUsername == '' && $this->mType != 'signup' ) {
1301                         if ( $user->isLoggedIn() ) {
1302                                 $this->mUsername = $user->getName();
1303                         } else {
1304                                 $this->mUsername = $this->getRequest()->getCookie( 'UserName' );
1305                         }
1306                 }
1307
1308                 // Generic styles and scripts for both login and signup form
1309                 $out->addModuleStyles( array(
1310                         'mediawiki.ui',
1311                         'mediawiki.ui.button',
1312                         'mediawiki.ui.checkbox',
1313                         'mediawiki.ui.input',
1314                         'mediawiki.special.userlogin.common.styles'
1315                 ) );
1316                 $out->addModules( array(
1317                         'mediawiki.special.userlogin.common.js'
1318                 ) );
1319
1320                 if ( $this->mType == 'signup' ) {
1321                         // XXX hack pending RL or JS parse() support for complex content messages
1322                         // https://bugzilla.wikimedia.org/show_bug.cgi?id=25349
1323                         $out->addJsConfigVars( 'wgCreateacctImgcaptchaHelp',
1324                                 $this->msg( 'createacct-imgcaptcha-help' )->parse() );
1325
1326                         // Additional styles and scripts for signup form
1327                         $out->addModules( array(
1328                                 'mediawiki.special.userlogin.signup.js'
1329                         ) );
1330                         $out->addModuleStyles( array(
1331                                 'mediawiki.special.userlogin.signup.styles'
1332                         ) );
1333
1334                         $template = new UsercreateTemplate();
1335
1336                         // Must match number of benefits defined in messages
1337                         $template->set( 'benefitCount', 3 );
1338
1339                         $q = 'action=submitlogin&type=signup';
1340                         $linkq = 'type=login';
1341                 } else {
1342                         // Additional styles for login form
1343                         $out->addModuleStyles( array(
1344                                 'mediawiki.special.userlogin.login.styles'
1345                         ) );
1346
1347                         $template = new UserloginTemplate();
1348
1349                         $q = 'action=submitlogin&type=login';
1350                         $linkq = 'type=signup';
1351                 }
1352
1353                 if ( $this->mReturnTo !== '' ) {
1354                         $returnto = '&returnto=' . wfUrlencode( $this->mReturnTo );
1355                         if ( $this->mReturnToQuery !== '' ) {
1356                                 $returnto .= '&returntoquery=' .
1357                                         wfUrlencode( $this->mReturnToQuery );
1358                         }
1359                         $q .= $returnto;
1360                         $linkq .= $returnto;
1361                 }
1362
1363                 # Don't show a "create account" link if the user can't.
1364                 if ( $this->showCreateOrLoginLink( $user ) ) {
1365                         # Pass any language selection on to the mode switch link
1366                         if ( $wgLoginLanguageSelector && $this->mLanguage ) {
1367                                 $linkq .= '&uselang=' . $this->mLanguage;
1368                         }
1369                         // Supply URL, login template creates the button.
1370                         $template->set( 'createOrLoginHref', $titleObj->getLocalURL( $linkq ) );
1371                 } else {
1372                         $template->set( 'link', '' );
1373                 }
1374
1375                 $resetLink = $this->mType == 'signup'
1376                         ? null
1377                         : is_array( $wgPasswordResetRoutes ) && in_array( true, array_values( $wgPasswordResetRoutes ) );
1378
1379                 $template->set( 'header', '' );
1380                 $template->set( 'skin', $this->getSkin() );
1381                 $template->set( 'name', $this->mUsername );
1382                 $template->set( 'password', $this->mPassword );
1383                 $template->set( 'retype', $this->mRetype );
1384                 $template->set( 'createemailset', $this->mCreateaccountMail );
1385                 $template->set( 'email', $this->mEmail );
1386                 $template->set( 'realname', $this->mRealName );
1387                 $template->set( 'domain', $this->mDomain );
1388                 $template->set( 'reason', $this->mReason );
1389
1390                 $template->set( 'action', $titleObj->getLocalURL( $q ) );
1391                 $template->set( 'message', $msg );
1392                 $template->set( 'messagetype', $msgtype );
1393                 $template->set( 'createemail', $wgEnableEmail && $user->isLoggedIn() );
1394                 $template->set( 'userealname', !in_array( 'realname', $wgHiddenPrefs ) );
1395                 $template->set( 'useemail', $wgEnableEmail );
1396                 $template->set( 'emailrequired', $wgEmailConfirmToEdit );
1397                 $template->set( 'emailothers', $wgEnableUserEmail );
1398                 $template->set( 'canreset', $wgAuth->allowPasswordChange() );
1399                 $template->set( 'resetlink', $resetLink );
1400                 $template->set( 'canremember', ( $wgCookieExpiration > 0 ) );
1401                 $template->set( 'usereason', $user->isLoggedIn() );
1402                 $template->set( 'remember', $this->mRemember );
1403                 $template->set( 'cansecurelogin', ( $wgSecureLogin === true ) );
1404                 $template->set( 'stickhttps', (int)$this->mStickHTTPS );
1405                 $template->set( 'loggedin', $user->isLoggedIn() );
1406                 $template->set( 'loggedinuser', $user->getName() );
1407
1408                 if ( $this->mType == 'signup' ) {
1409                         if ( !self::getCreateaccountToken() ) {
1410                                 self::setCreateaccountToken();
1411                         }
1412                         $template->set( 'token', self::getCreateaccountToken() );
1413                 } else {
1414                         if ( !self::getLoginToken() ) {
1415                                 self::setLoginToken();
1416                         }
1417                         $template->set( 'token', self::getLoginToken() );
1418                 }
1419
1420                 # Prepare language selection links as needed
1421                 if ( $wgLoginLanguageSelector ) {
1422                         $template->set( 'languages', $this->makeLanguageSelector() );
1423                         if ( $this->mLanguage ) {
1424                                 $template->set( 'uselang', $this->mLanguage );
1425                         }
1426                 }
1427
1428                 $template->set( 'secureLoginUrl', $this->mSecureLoginUrl );
1429                 // Use signupend-https for HTTPS requests if it's not blank, signupend otherwise
1430                 $usingHTTPS = $this->mRequest->getProtocol() == 'https';
1431                 $signupendHTTPS = $this->msg( 'signupend-https' );
1432                 if ( $usingHTTPS && !$signupendHTTPS->isBlank() ) {
1433                         $template->set( 'signupend', $signupendHTTPS->parse() );
1434                 } else {
1435                         $template->set( 'signupend', $this->msg( 'signupend' )->parse() );
1436                 }
1437
1438                 // Give authentication and captcha plugins a chance to modify the form
1439                 $wgAuth->modifyUITemplate( $template, $this->mType );
1440                 if ( $this->mType == 'signup' ) {
1441                         wfRunHooks( 'UserCreateForm', array( &$template ) );
1442                 } else {
1443                         wfRunHooks( 'UserLoginForm', array( &$template ) );
1444                 }
1445
1446                 $out->disallowUserJs(); // just in case...
1447                 $out->addTemplate( $template );
1448         }
1449
1450         /**
1451          * Whether the login/create account form should display a link to the
1452          * other form (in addition to whatever the skin provides).
1453          *
1454          * @param User $user
1455          * @return bool
1456          */
1457         private function showCreateOrLoginLink( &$user ) {
1458                 if ( $this->mType == 'signup' ) {
1459                         return true;
1460                 } elseif ( $user->isAllowed( 'createaccount' ) ) {
1461                         return true;
1462                 } else {
1463                         return false;
1464                 }
1465         }
1466
1467         /**
1468          * Check if a session cookie is present.
1469          *
1470          * This will not pick up a cookie set during _this_ request, but is meant
1471          * to ensure that the client is returning the cookie which was set on a
1472          * previous pass through the system.
1473          *
1474          * @private
1475          * @return bool
1476          */
1477         function hasSessionCookie() {
1478                 global $wgDisableCookieCheck;
1479
1480                 return $wgDisableCookieCheck ? true : $this->getRequest()->checkSessionCookie();
1481         }
1482
1483         /**
1484          * Get the login token from the current session
1485          * @return mixed
1486          */
1487         public static function getLoginToken() {
1488                 global $wgRequest;
1489
1490                 return $wgRequest->getSessionData( 'wsLoginToken' );
1491         }
1492
1493         /**
1494          * Randomly generate a new login token and attach it to the current session
1495          */
1496         public static function setLoginToken() {
1497                 global $wgRequest;
1498                 // Generate a token directly instead of using $user->getEditToken()
1499                 // because the latter reuses $_SESSION['wsEditToken']
1500                 $wgRequest->setSessionData( 'wsLoginToken', MWCryptRand::generateHex( 32 ) );
1501         }
1502
1503         /**
1504          * Remove any login token attached to the current session
1505          */
1506         public static function clearLoginToken() {
1507                 global $wgRequest;
1508                 $wgRequest->setSessionData( 'wsLoginToken', null );
1509         }
1510
1511         /**
1512          * Get the createaccount token from the current session
1513          * @return mixed
1514          */
1515         public static function getCreateaccountToken() {
1516                 global $wgRequest;
1517
1518                 return $wgRequest->getSessionData( 'wsCreateaccountToken' );
1519         }
1520
1521         /**
1522          * Randomly generate a new createaccount token and attach it to the current session
1523          */
1524         public static function setCreateaccountToken() {
1525                 global $wgRequest;
1526                 $wgRequest->setSessionData( 'wsCreateaccountToken', MWCryptRand::generateHex( 32 ) );
1527         }
1528
1529         /**
1530          * Remove any createaccount token attached to the current session
1531          */
1532         public static function clearCreateaccountToken() {
1533                 global $wgRequest;
1534                 $wgRequest->setSessionData( 'wsCreateaccountToken', null );
1535         }
1536
1537         /**
1538          * Renew the user's session id, using strong entropy
1539          */
1540         private function renewSessionId() {
1541                 global $wgSecureLogin, $wgCookieSecure;
1542                 if ( $wgSecureLogin && !$this->mStickHTTPS ) {
1543                         $wgCookieSecure = false;
1544                 }
1545
1546                 wfResetSessionID();
1547         }
1548
1549         /**
1550          * @param string $type
1551          * @private
1552          */
1553         function cookieRedirectCheck( $type ) {
1554                 $titleObj = SpecialPage::getTitleFor( 'Userlogin' );
1555                 $query = array( 'wpCookieCheck' => $type );
1556                 if ( $this->mReturnTo !== '' ) {
1557                         $query['returnto'] = $this->mReturnTo;
1558                         $query['returntoquery'] = $this->mReturnToQuery;
1559                 }
1560                 $check = $titleObj->getFullURL( $query );
1561
1562                 $this->getOutput()->redirect( $check );
1563         }
1564
1565         /**
1566          * @param string $type
1567          * @private
1568          */
1569         function onCookieRedirectCheck( $type ) {
1570                 if ( !$this->hasSessionCookie() ) {
1571                         if ( $type == 'new' ) {
1572                                 $this->mainLoginForm( $this->msg( 'nocookiesnew' )->parse() );
1573                         } elseif ( $type == 'login' ) {
1574                                 $this->mainLoginForm( $this->msg( 'nocookieslogin' )->parse() );
1575                         } else {
1576                                 # shouldn't happen
1577                                 $this->mainLoginForm( $this->msg( 'error' )->text() );
1578                         }
1579                 } else {
1580                         $this->successfulLogin();
1581                 }
1582         }
1583
1584         /**
1585          * Produce a bar of links which allow the user to select another language
1586          * during login/registration but retain "returnto"
1587          *
1588          * @return string
1589          */
1590         function makeLanguageSelector() {
1591                 $msg = $this->msg( 'loginlanguagelinks' )->inContentLanguage();
1592                 if ( !$msg->isBlank() ) {
1593                         $langs = explode( "\n", $msg->text() );
1594                         $links = array();
1595                         foreach ( $langs as $lang ) {
1596                                 $lang = trim( $lang, '* ' );
1597                                 $parts = explode( '|', $lang );
1598                                 if ( count( $parts ) >= 2 ) {
1599                                         $links[] = $this->makeLanguageSelectorLink( $parts[0], trim( $parts[1] ) );
1600                                 }
1601                         }
1602
1603                         return count( $links ) > 0 ? $this->msg( 'loginlanguagelabel' )->rawParams(
1604                                 $this->getLanguage()->pipeList( $links ) )->escaped() : '';
1605                 } else {
1606                         return '';
1607                 }
1608         }
1609
1610         /**
1611          * Create a language selector link for a particular language
1612          * Links back to this page preserving type and returnto
1613          *
1614          * @param string $text Link text
1615          * @param string $lang Language code
1616          * @return string
1617          */
1618         function makeLanguageSelectorLink( $text, $lang ) {
1619                 if ( $this->getLanguage()->getCode() == $lang ) {
1620                         // no link for currently used language
1621                         return htmlspecialchars( $text );
1622                 }
1623                 $query = array( 'uselang' => $lang );
1624                 if ( $this->mType == 'signup' ) {
1625                         $query['type'] = 'signup';
1626                 }
1627                 if ( $this->mReturnTo !== '' ) {
1628                         $query['returnto'] = $this->mReturnTo;
1629                         $query['returntoquery'] = $this->mReturnToQuery;
1630                 }
1631
1632                 $attr = array();
1633                 $targetLanguage = Language::factory( $lang );
1634                 $attr['lang'] = $attr['hreflang'] = $targetLanguage->getHtmlCode();
1635
1636                 return Linker::linkKnown(
1637                         $this->getPageTitle(),
1638                         htmlspecialchars( $text ),
1639                         $attr,
1640                         $query
1641                 );
1642         }
1643
1644         protected function getGroupName() {
1645                 return 'login';
1646         }
1647 }