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