includes/SpecialUserlogin.php

   1 <?php
   2 /**
   3  *
   4  * @addtogroup SpecialPage
   5  */
   6
   7 /**
   8  * constructor
   9  */
  10 function wfSpecialUserlogin() {
  11         global $wgCommandLineMode;
  12         global $wgRequest;
  13         if( session_id() == '' ) {
  14                 wfSetupSession();
  15         }
  16
  17         $form = new LoginForm( $wgRequest );
  18         $form->execute();
  19 }
  20
  21 /**
  22  * implements Special:Login
  23  * @addtogroup SpecialPage
  24  */
  25 class LoginForm {
  26
  27         const SUCCESS = 0;
  28         const NO_NAME = 1;
  29         const ILLEGAL = 2;
  30         const WRONG_PLUGIN_PASS = 3;
  31         const NOT_EXISTS = 4;
  32         const WRONG_PASS = 5;
  33         const EMPTY_PASS = 6;
  34         const RESET_PASS = 7;
  35         const ABORTED = 8;
  36
  37         var $mName, $mPassword, $mRetype, $mReturnTo, $mCookieCheck, $mPosted;
  38         var $mAction, $mCreateaccount, $mCreateaccountMail, $mMailmypassword;
  39         var $mLoginattempt, $mRemember, $mEmail, $mDomain, $mLanguage;
  40
  41         /**
  42          * Constructor
  43          * @param WebRequest $request A WebRequest object passed by reference
  44          */
  45         function LoginForm( &$request ) {
  46                 global $wgLang, $wgAllowRealName, $wgEnableEmail;
  47                 global $wgAuth;
  48
  49                 $this->mType = $request->getText( 'type' );
  50                 $this->mName = $request->getText( 'wpName' );
  51                 $this->mPassword = $request->getText( 'wpPassword' );
  52                 $this->mRetype = $request->getText( 'wpRetype' );
  53                 $this->mDomain = $request->getText( 'wpDomain' );
  54                 $this->mReturnTo = $request->getVal( 'returnto' );
  55                 $this->mCookieCheck = $request->getVal( 'wpCookieCheck' );
  56                 $this->mPosted = $request->wasPosted();
  57                 $this->mCreateaccount = $request->getCheck( 'wpCreateaccount' );
  58                 $this->mCreateaccountMail = $request->getCheck( 'wpCreateaccountMail' )
  59                                             && $wgEnableEmail;
  60                 $this->mMailmypassword = $request->getCheck( 'wpMailmypassword' )
  61                                          && $wgEnableEmail;
  62                 $this->mLoginattempt = $request->getCheck( 'wpLoginattempt' );
  63                 $this->mAction = $request->getVal( 'action' );
  64                 $this->mRemember = $request->getCheck( 'wpRemember' );
  65                 $this->mLanguage = $request->getText( 'uselang' );
  66
  67                 if( $wgEnableEmail ) {
  68                         $this->mEmail = $request->getText( 'wpEmail' );
  69                 } else {
  70                         $this->mEmail = '';
  71                 }
  72                 if( $wgAllowRealName ) {
  73                     $this->mRealName = $request->getText( 'wpRealName' );
  74                 } else {
  75                     $this->mRealName = '';
  76                 }
  77
  78                 if( !$wgAuth->validDomain( $this->mDomain ) ) {
  79                         $this->mDomain = 'invaliddomain';
  80                 }
  81                 $wgAuth->setDomain( $this->mDomain );
  82
  83                 # When switching accounts, it sucks to get automatically logged out
  84                 if( $this->mReturnTo == $wgLang->specialPage( 'Userlogout' ) ) {
  85                         $this->mReturnTo = '';
  86                 }
  87         }
  88
  89         function execute() {
  90                 if ( !is_null( $this->mCookieCheck ) ) {
  91                         $this->onCookieRedirectCheck( $this->mCookieCheck );
  92                         return;
  93                 } else if( $this->mPosted ) {
  94                         if( $this->mCreateaccount ) {
  95                                 return $this->addNewAccount();
  96                         } else if ( $this->mCreateaccountMail ) {
  97                                 return $this->addNewAccountMailPassword();
  98                         } else if ( $this->mMailmypassword ) {
  99                                 return $this->mailPassword();
 100                         } else if ( ( 'submitlogin' == $this->mAction ) || $this->mLoginattempt ) {
 101                                 return $this->processLogin();
 102                         }
 103                 }
 104                 $this->mainLoginForm( '' );
 105         }
 106
 107         /**
 108          * @private
 109          */
 110         function addNewAccountMailPassword() {
 111                 global $wgOut;
 112
 113                 if ('' == $this->mEmail) {
 114                         $this->mainLoginForm( wfMsg( 'noemail', htmlspecialchars( $this->mName ) ) );
 115                         return;
 116                 }
 117
 118                 $u = $this->addNewaccountInternal();
 119
 120                 if ($u == NULL) {
 121                         return;
 122                 }
 123
 124                 // Wipe the initial password and mail a temporary one
 125                 $u->setPassword( null );
 126                 $u->saveSettings();
 127                 $result = $this->mailPasswordInternal( $u, false );
 128
 129                 wfRunHooks( 'AddNewAccount', array( $u ) );
 130
 131                 $wgOut->setPageTitle( wfMsg( 'accmailtitle' ) );
 132                 $wgOut->setRobotpolicy( 'noindex,nofollow' );
 133                 $wgOut->setArticleRelated( false );
 134
 135                 if( WikiError::isError( $result ) ) {
 136                         $this->mainLoginForm( wfMsg( 'mailerror', $result->getMessage() ) );
 137                 } else {
 138                         $wgOut->addWikiText( wfMsg( 'accmailtext', $u->getName(), $u->getEmail() ) );
 139                         $wgOut->returnToMain( false );
 140                 }
 141                 $u = 0;
 142         }
 143
 144
 145         /**
 146          * @private
 147          */
 148         function addNewAccount() {
 149                 global $wgUser, $wgEmailAuthentication;
 150
 151                 # Create the account and abort if there's a problem doing so
 152                 $u = $this->addNewAccountInternal();
 153                 if( $u == NULL )
 154                         return;
 155
 156                 # If we showed up language selection links, and one was in use, be
 157                 # smart (and sensible) and save that language as the user's preference
 158                 global $wgLoginLanguageSelector;
 159                 if( $wgLoginLanguageSelector && $this->mLanguage )
 160                         $u->setOption( 'language', $this->mLanguage );
 161
 162                 # Save user settings and send out an email authentication message if needed
 163                 $u->saveSettings();
 164                 if( $wgEmailAuthentication && User::isValidEmailAddr( $u->getEmail() ) ) {
 165                         global $wgOut;
 166                         $error = $u->sendConfirmationMail();
 167                         if( WikiError::isError( $error ) ) {
 168                                 $wgOut->addWikiText( wfMsg( 'confirmemail_sendfailed', $error->getMessage() ) );
 169                         } else {
 170                                 $wgOut->addWikiText( wfMsg( 'confirmemail_oncreate' ) );
 171                         }
 172                 }
 173
 174                 # If not logged in, assume the new account as the current one and set session cookies
 175                 # then show a "welcome" message or a "need cookies" message as needed
 176                 if( $wgUser->isAnon() ) {
 177                         $wgUser = $u;
 178                         $wgUser->setCookies();
 179                         wfRunHooks( 'AddNewAccount', array( $wgUser ) );
 180                         if( $this->hasSessionCookie() ) {
 181                                 return $this->successfulLogin( wfMsg( 'welcomecreation', $wgUser->getName() ), false );
 182                         } else {
 183                                 return $this->cookieRedirectCheck( 'new' );
 184                         }
 185                 } else {
 186                         # Confirm that the account was created
 187                         global $wgOut;
 188                         $self = SpecialPage::getTitleFor( 'Userlogin' );
 189                         $wgOut->setPageTitle( wfMsgHtml( 'accountcreated' ) );
 190                         $wgOut->setArticleRelated( false );
 191                         $wgOut->setRobotPolicy( 'noindex,nofollow' );
 192                         $wgOut->addHtml( wfMsgWikiHtml( 'accountcreatedtext', $u->getName() ) );
 193                         $wgOut->returnToMain( $self->getPrefixedText() );
 194                         wfRunHooks( 'AddNewAccount', array( $u ) );
 195                         return true;
 196                 }
 197         }
 198
 199         /**
 200          * @private
 201          */
 202         function addNewAccountInternal() {
 203                 global $wgUser, $wgOut;
 204                 global $wgEnableSorbs, $wgProxyWhitelist;
 205                 global $wgMemc, $wgAccountCreationThrottle;
 206                 global $wgAuth, $wgMinimalPasswordLength;
 207
 208                 // If the user passes an invalid domain, something is fishy
 209                 if( !$wgAuth->validDomain( $this->mDomain ) ) {
 210                         $this->mainLoginForm( wfMsg( 'wrongpassword' ) );
 211                         return false;
 212                 }
 213
 214                 // If we are not allowing users to login locally, we should
 215                 // be checking to see if the user is actually able to
 216                 // authenticate to the authentication server before they
 217                 // create an account (otherwise, they can create a local account
 218                 // and login as any domain user). We only need to check this for
 219                 // domains that aren't local.
 220                 if( 'local' != $this->mDomain && '' != $this->mDomain ) {
 221                         if( !$wgAuth->canCreateAccounts() && ( !$wgAuth->userExists( $this->mName ) || !$wgAuth->authenticate( $this->mName, $this->mPassword ) ) ) {
 222                                 $this->mainLoginForm( wfMsg( 'wrongpassword' ) );
 223                                 return false;
 224                         }
 225                 }
 226
 227                 if ( wfReadOnly() ) {
 228                         $wgOut->readOnlyPage();
 229                         return false;
 230                 }
 231
 232                 # Check anonymous user ($wgUser) limitations :
 233                 if (!$wgUser->isAllowedToCreateAccount()) {
 234                         $this->userNotPrivilegedMessage();
 235                         return false;
 236                 }
 237
 238                 $ip = wfGetIP();
 239                 if ( $wgEnableSorbs && !in_array( $ip, $wgProxyWhitelist ) &&
 240                   $wgUser->inSorbsBlacklist( $ip ) )
 241                 {
 242                         $this->mainLoginForm( wfMsg( 'sorbs_create_account_reason' ) . ' (' . htmlspecialchars( $ip ) . ')' );
 243                         return;
 244                 }
 245
 246                 # Now create a dummy user ($u) and check if it is valid
 247                 $name = trim( $this->mName );
 248                 $u = User::newFromName( $name, 'creatable' );
 249                 if ( is_null( $u ) ) {
 250                         $this->mainLoginForm( wfMsg( 'noname' ) );
 251                         return false;
 252                 }
 253
 254                 if ( 0 != $u->idForName() ) {
 255                         $this->mainLoginForm( wfMsg( 'userexists' ) );
 256                         return false;
 257                 }
 258
 259                 if ( 0 != strcmp( $this->mPassword, $this->mRetype ) ) {
 260                         $this->mainLoginForm( wfMsg( 'badretype' ) );
 261                         return false;
 262                 }
 263
 264                 if ( !$u->isValidPassword( $this->mPassword ) ) {
 265                         $this->mainLoginForm( wfMsg( 'passwordtooshort', $wgMinimalPasswordLength ) );
 266                         return false;
 267                 }
 268
 269                 $abortError = '';
 270                 if( !wfRunHooks( 'AbortNewAccount', array( $u, &$abortError ) ) ) {
 271                         // Hook point to add extra creation throttles and blocks
 272                         wfDebug( "LoginForm::addNewAccountInternal: a hook blocked creation\n" );
 273                         $this->mainLoginForm( $abortError );
 274                         return false;
 275                 }
 276
 277                 if ( $wgAccountCreationThrottle && $wgUser->isPingLimitable() ) {
 278                         $key = wfMemcKey( 'acctcreate', 'ip', $ip );
 279                         $value = $wgMemc->incr( $key );
 280                         if ( !$value ) {
 281                                 $wgMemc->set( $key, 1, 86400 );
 282                         }
 283                         if ( $value > $wgAccountCreationThrottle ) {
 284                                 $this->throttleHit( $wgAccountCreationThrottle );
 285                                 return false;
 286                         }
 287                 }
 288
 289                 if( !$wgAuth->addUser( $u, $this->mPassword, $this->mEmail, $this->mRealName ) ) {
 290                         $this->mainLoginForm( wfMsg( 'externaldberror' ) );
 291                         return false;
 292                 }
 293
 294                 return $this->initUser( $u );
 295         }
 296
 297         /**
 298          * Actually add a user to the database.
 299          * Give it a User object that has been initialised with a name.
 300          *
 301          * @param $u User object.
 302          * @return User object.
 303          * @private
 304          */
 305         function initUser( $u ) {
 306                 global $wgAuth;
 307
 308                 $u->addToDatabase();
 309
 310                 if ( $wgAuth->allowPasswordChange() ) {
 311                         $u->setPassword( $this->mPassword );
 312                 }
 313
 314                 $u->setEmail( $this->mEmail );
 315                 $u->setRealName( $this->mRealName );
 316                 $u->setToken();
 317
 318                 $wgAuth->initUser( $u );
 319
 320                 $u->setOption( 'rememberpassword', $this->mRemember ? 1 : 0 );
 321                 $u->saveSettings();
 322
 323                 # Update user count
 324                 $ssUpdate = new SiteStatsUpdate( 0, 0, 0, 0, 1 );
 325                 $ssUpdate->doUpdate();
 326
 327                 return $u;
 328         }
 329
 330         /**
 331          * Internally authenticate the login request.
 332          *
 333          * This may create a local account as a side effect if the
 334          * authentication plugin allows transparent local account
 335          * creation.
 336          *
 337          * @public
 338          */
 339         function authenticateUserData() {
 340                 global $wgUser, $wgAuth;
 341                 if ( '' == $this->mName ) {
 342                         return self::NO_NAME;
 343                 }
 344                 $u = User::newFromName( $this->mName );
 345                 if( is_null( $u ) || !User::isUsableName( $u->getName() ) ) {
 346                         return self::ILLEGAL;
 347                 }
 348                 if ( 0 == $u->getID() ) {
 349                         global $wgAuth;
 350                         /**
 351                          * If the external authentication plugin allows it,
 352                          * automatically create a new account for users that
 353                          * are externally defined but have not yet logged in.
 354                          */
 355                         if ( $wgAuth->autoCreate() && $wgAuth->userExists( $u->getName() ) ) {
 356                                 if ( $wgAuth->authenticate( $u->getName(), $this->mPassword ) ) {
 357                                         $u = $this->initUser( $u );
 358                                 } else {
 359                                         return self::WRONG_PLUGIN_PASS;
 360                                 }
 361                         } else {
 362                                 return self::NOT_EXISTS;
 363                         }
 364                 } else {
 365                         $u->load();
 366                 }
 367
 368                 // Give general extensions, such as a captcha, a chance to abort logins
 369                 $abort = self::ABORTED;
 370                 if( !wfRunHooks( 'AbortLogin', array( $u, $this->mPassword, &$abort ) ) ) {
 371                         return $abort;
 372                 }
 373
 374                 if (!$u->checkPassword( $this->mPassword )) {
 375                         if( $u->checkTemporaryPassword( $this->mPassword ) ) {
 376                                 // The e-mailed temporary password should not be used
 377                                 // for actual logins; that's a very sloppy habit,
 378                                 // and insecure if an attacker has a few seconds to
 379                                 // click "search" on someone's open mail reader.
 380                                 //
 381                                 // Allow it to be used only to reset the password
 382                                 // a single time to a new value, which won't be in
 383                                 // the user's e-mail archives.
 384                                 //
 385                                 // For backwards compatibility, we'll still recognize
 386                                 // it at the login form to minimize surprises for
 387                                 // people who have been logging in with a temporary
 388                                 // password for some time.
 389                                 //
 390                                 // As a side-effect, we can authenticate the user's
 391                                 // e-mail address if it's not already done, since
 392                                 // the temporary password was sent via e-mail.
 393                                 //
 394                                 if( !$u->isEmailConfirmed() ) {
 395                                         $u->confirmEmail();
 396                                 }
 397
 398                                 // At this point we just return an appropriate code
 399                                 // indicating that the UI should show a password
 400                                 // reset form; bot interfaces etc will probably just
 401                                 // fail cleanly here.
 402                                 //
 403                                 $retval = self::RESET_PASS;
 404                         } else {
 405                                 $retval = '' == $this->mPassword ? self::EMPTY_PASS : self::WRONG_PASS;
 406                         }
 407                 } else {
 408                         $wgAuth->updateUser( $u );
 409                         $wgUser = $u;
 410
 411                         $retval = self::SUCCESS;
 412                 }
 413                 wfRunHooks( 'LoginAuthenticateAudit', array( $u, $this->mPassword, $retval ) );
 414                 return $retval;
 415         }
 416
 417         function processLogin() {
 418                 global $wgUser, $wgAuth;
 419
 420                 switch ($this->authenticateUserData())
 421                 {
 422                         case self::SUCCESS:
 423                                 # We've verified now, update the real record
 424                                 if( (bool)$this->mRemember != (bool)$wgUser->getOption( 'rememberpassword' ) ) {
 425                                         $wgUser->setOption( 'rememberpassword', $this->mRemember ? 1 : 0 );
 426                                         $wgUser->saveSettings();
 427                                 } else {
 428                                         $wgUser->invalidateCache();
 429                                 }
 430                                 $wgUser->setCookies();
 431
 432                                 if( $this->hasSessionCookie() ) {
 433                                         return $this->successfulLogin( wfMsg( 'loginsuccess', $wgUser->getName() ) );
 434                                 } else {
 435                                         return $this->cookieRedirectCheck( 'login' );
 436                                 }
 437                                 break;
 438
 439                         case self::NO_NAME:
 440                         case self::ILLEGAL:
 441                                 $this->mainLoginForm( wfMsg( 'noname' ) );
 442                                 break;
 443                         case self::WRONG_PLUGIN_PASS:
 444                                 $this->mainLoginForm( wfMsg( 'wrongpassword' ) );
 445                                 break;
 446                         case self::NOT_EXISTS:
 447                                 $this->mainLoginForm( wfMsg( 'nosuchuser', htmlspecialchars( $this->mName ) ) );
 448                                 break;
 449                         case self::WRONG_PASS:
 450                                 $this->mainLoginForm( wfMsg( 'wrongpassword' ) );
 451                                 break;
 452                         case self::EMPTY_PASS:
 453                                 $this->mainLoginForm( wfMsg( 'wrongpasswordempty' ) );
 454                                 break;
 455                         case self::RESET_PASS:
 456                                 $this->resetLoginForm( wfMsg( 'resetpass_announce' ) );
 457                                 break;
 458                         default:
 459                                 wfDebugDieBacktrace( "Unhandled case value" );
 460                 }
 461         }
 462
 463         function resetLoginForm( $error ) {
 464                 global $wgOut;
 465                 $wgOut->addWikiText( "<div class=\"errorbox\">$error</div>" );
 466                 $reset = new PasswordResetForm( $this->mName, $this->mPassword );
 467                 $reset->execute();
 468         }
 469
 470         /**
 471          * @private
 472          */
 473         function mailPassword() {
 474                 global $wgUser, $wgOut, $wgAuth;
 475
 476                 if( !$wgAuth->allowPasswordChange() ) {
 477                         $this->mainLoginForm( wfMsg( 'resetpass_forbidden' ) );
 478                         return;
 479                 }
 480
 481                 # Check against blocked IPs
 482                 # fixme -- should we not?
 483                 if( $wgUser->isBlocked() ) {
 484                         $this->mainLoginForm( wfMsg( 'blocked-mailpassword' ) );
 485                         return;
 486                 }
 487
 488                 # Check against the rate limiter
 489                 if( $wgUser->pingLimiter( 'mailpassword' ) ) {
 490                         $wgOut->rateLimited();
 491                         return;
 492                 }
 493
 494                 if ( '' == $this->mName ) {
 495                         $this->mainLoginForm( wfMsg( 'noname' ) );
 496                         return;
 497                 }
 498                 $u = User::newFromName( $this->mName );
 499                 if( is_null( $u ) ) {
 500                         $this->mainLoginForm( wfMsg( 'noname' ) );
 501                         return;
 502                 }
 503                 if ( 0 == $u->getID() ) {
 504                         $this->mainLoginForm( wfMsg( 'nosuchuser', $u->getName() ) );
 505                         return;
 506                 }
 507
 508                 # Check against password throttle
 509                 if ( $u->isPasswordReminderThrottled() ) {
 510                         global $wgPasswordReminderResendTime;
 511                         # Round the time in hours to 3 d.p., in case someone is specifying minutes or seconds.
 512                         $this->mainLoginForm( wfMsg( 'throttled-mailpassword',
 513                                 round( $wgPasswordReminderResendTime, 3 ) ) );
 514                         return;
 515                 }
 516
 517                 $result = $this->mailPasswordInternal( $u, true );
 518                 if( WikiError::isError( $result ) ) {
 519                         $this->mainLoginForm( wfMsg( 'mailerror', $result->getMessage() ) );
 520                 } else {
 521                         $this->mainLoginForm( wfMsg( 'passwordsent', $u->getName() ), 'success' );
 522                 }
 523         }
 524
 525
 526         /**
 527          * @return mixed true on success, WikiError on failure
 528          * @private
 529          */
 530         function mailPasswordInternal( $u, $throttle = true ) {
 531                 global $wgCookiePath, $wgCookieDomain, $wgCookiePrefix, $wgCookieSecure;
 532                 global $wgServer, $wgScript;
 533
 534                 if ( '' == $u->getEmail() ) {
 535                         return new WikiError( wfMsg( 'noemail', $u->getName() ) );
 536                 }
 537
 538                 $np = $u->randomPassword();
 539                 $u->setNewpassword( $np, $throttle );
 540
 541                 setcookie( "{$wgCookiePrefix}Token", '', time() - 3600, $wgCookiePath, $wgCookieDomain, $wgCookieSecure );
 542
 543                 $u->saveSettings();
 544
 545                 $ip = wfGetIP();
 546                 if ( '' == $ip ) { $ip = '(Unknown)'; }
 547
 548                 $m = wfMsg( 'passwordremindertext', $ip, $u->getName(), $np, $wgServer . $wgScript );
 549
 550                 $result = $u->sendMail( wfMsg( 'passwordremindertitle' ), $m );
 551                 return $result;
 552         }
 553
 554
 555         /**
 556          * @param string $msg Message that will be shown on success
 557          * @param bool $auto Toggle auto-redirect to main page; default true
 558          * @private
 559          */
 560         function successfulLogin( $msg, $auto = true ) {
 561                 global $wgUser;
 562                 global $wgOut;
 563
 564                 # Run any hooks; ignore results
 565
 566                 wfRunHooks('UserLoginComplete', array(&$wgUser));
 567
 568                 $wgOut->setPageTitle( wfMsg( 'loginsuccesstitle' ) );
 569                 $wgOut->setRobotpolicy( 'noindex,nofollow' );
 570                 $wgOut->setArticleRelated( false );
 571                 $wgOut->addWikiText( $msg );
 572                 if ( !empty( $this->mReturnTo ) ) {
 573                         $wgOut->returnToMain( $auto, $this->mReturnTo );
 574                 } else {
 575                         $wgOut->returnToMain( $auto );
 576                 }
 577         }
 578
 579         /** */
 580         function userNotPrivilegedMessage() {
 581                 global $wgOut;
 582
 583                 $wgOut->setPageTitle( wfMsg( 'whitelistacctitle' ) );
 584                 $wgOut->setRobotpolicy( 'noindex,nofollow' );
 585                 $wgOut->setArticleRelated( false );
 586
 587                 $wgOut->addWikiText( wfMsg( 'whitelistacctext' ) );
 588
 589                 $wgOut->returnToMain( false );
 590         }
 591
 592         /** */
 593         function userBlockedMessage() {
 594                 global $wgOut;
 595
 596                 # Let's be nice about this, it's likely that this feature will be used
 597                 # for blocking large numbers of innocent people, e.g. range blocks on
 598                 # schools. Don't blame it on the user. There's a small chance that it
 599                 # really is the user's fault, i.e. the username is blocked and they
 600                 # haven't bothered to log out before trying to create an account to
 601                 # evade it, but we'll leave that to their guilty conscience to figure
 602                 # out.
 603
 604                 $wgOut->setPageTitle( wfMsg( 'cantcreateaccounttitle' ) );
 605                 $wgOut->setRobotpolicy( 'noindex,nofollow' );
 606                 $wgOut->setArticleRelated( false );
 607
 608                 $ip = wfGetIP();
 609                 $wgOut->addWikiText( wfMsg( 'cantcreateaccounttext', $ip ) );
 610                 $wgOut->returnToMain( false );
 611         }
 612
 613         /**
 614          * @private
 615          */
 616         function mainLoginForm( $msg, $msgtype = 'error' ) {
 617                 global $wgUser, $wgOut, $wgAllowRealName, $wgEnableEmail;
 618                 global $wgCookiePrefix, $wgAuth, $wgLoginLanguageSelector;
 619                 global $wgAuth;
 620
 621                 if ( $this->mType == 'signup' ) {
 622                         if ( !$wgUser->isAllowed( 'createaccount' ) ) {
 623                                 $this->userNotPrivilegedMessage();
 624                                 return;
 625                         } elseif ( $wgUser->isBlockedFromCreateAccount() ) {
 626                                 $this->userBlockedMessage();
 627                                 return;
 628                         }
 629                 }
 630
 631                 if ( '' == $this->mName ) {
 632                         if ( $wgUser->isLoggedIn() ) {
 633                                 $this->mName = $wgUser->getName();
 634                         } else {
 635                                 $this->mName = isset( $_COOKIE[$wgCookiePrefix.'UserName'] ) ? $_COOKIE[$wgCookiePrefix.'UserName'] : null;
 636                         }
 637                 }
 638
 639                 $titleObj = SpecialPage::getTitleFor( 'Userlogin' );
 640
 641                 if ( $this->mType == 'signup' ) {
 642                         $template = new UsercreateTemplate();
 643                         $q = 'action=submitlogin&type=signup';
 644                         $linkq = 'type=login';
 645                         $linkmsg = 'gotaccount';
 646                 } else {
 647                         $template = new UserloginTemplate();
 648                         $q = 'action=submitlogin&type=login';
 649                         $linkq = 'type=signup';
 650                         $linkmsg = 'nologin';
 651                 }
 652
 653                 if ( !empty( $this->mReturnTo ) ) {
 654                         $returnto = '&returnto=' . wfUrlencode( $this->mReturnTo );
 655                         $q .= $returnto;
 656                         $linkq .= $returnto;
 657                 }
 658
 659                 # Pass any language selection on to the mode switch link
 660                 if( $wgLoginLanguageSelector && $this->mLanguage )
 661                         $linkq .= '&uselang=' . $this->mLanguage;
 662
 663                 $link = '<a href="' . htmlspecialchars ( $titleObj->getLocalUrl( $linkq ) ) . '">';
 664                 $link .= wfMsgHtml( $linkmsg . 'link' );
 665                 $link .= '</a>';
 666
 667                 # Don't show a "create account" link if the user can't
 668                 if( $this->showCreateOrLoginLink( $wgUser ) )
 669                         $template->set( 'link', wfMsgHtml( $linkmsg, $link ) );
 670                 else
 671                         $template->set( 'link', '' );
 672
 673                 $template->set( 'header', '' );
 674                 $template->set( 'name', $this->mName );
 675                 $template->set( 'password', $this->mPassword );
 676                 $template->set( 'retype', $this->mRetype );
 677                 $template->set( 'email', $this->mEmail );
 678                 $template->set( 'realname', $this->mRealName );
 679                 $template->set( 'domain', $this->mDomain );
 680
 681                 $template->set( 'action', $titleObj->getLocalUrl( $q ) );
 682                 $template->set( 'message', $msg );
 683                 $template->set( 'messagetype', $msgtype );
 684                 $template->set( 'createemail', $wgEnableEmail && $wgUser->isLoggedIn() );
 685                 $template->set( 'userealname', $wgAllowRealName );
 686                 $template->set( 'useemail', $wgEnableEmail );
 687                 $template->set( 'canreset', $wgAuth->allowPasswordChange() );
 688                 $template->set( 'remember', $wgUser->getOption( 'rememberpassword' ) or $this->mRemember  );
 689
 690                 # Prepare language selection links as needed
 691                 if( $wgLoginLanguageSelector ) {
 692                         $template->set( 'languages', $this->makeLanguageSelector() );
 693                         if( $this->mLanguage )
 694                                 $template->set( 'uselang', $this->mLanguage );
 695                 }
 696
 697                 // Give authentication and captcha plugins a chance to modify the form
 698                 $wgAuth->modifyUITemplate( $template );
 699                 if ( $this->mType == 'signup' ) {
 700                         wfRunHooks( 'UserCreateForm', array( &$template ) );
 701                 } else {
 702                         wfRunHooks( 'UserLoginForm', array( &$template ) );
 703                 }
 704
 705                 $wgOut->setPageTitle( wfMsg( 'userlogin' ) );
 706                 $wgOut->setRobotpolicy( 'noindex,nofollow' );
 707                 $wgOut->setArticleRelated( false );
 708                 $wgOut->disallowUserJs();  // just in case...
 709                 $wgOut->addTemplate( $template );
 710         }
 711
 712         /**
 713          * @private
 714          */
 715         function showCreateOrLoginLink( &$user ) {
 716                 if( $this->mType == 'signup' ) {
 717                         return( true );
 718                 } elseif( $user->isAllowed( 'createaccount' ) ) {
 719                         return( true );
 720                 } else {
 721                         return( false );
 722                 }
 723         }
 724
 725         /**
 726          * Check if a session cookie is present.
 727          *
 728          * This will not pick up a cookie set during _this_ request, but is
 729          * meant to ensure that the client is returning the cookie which was
 730          * set on a previous pass through the system.
 731          *
 732          * @private
 733          */
 734         function hasSessionCookie() {
 735                 global $wgDisableCookieCheck, $wgRequest;
 736                 return $wgDisableCookieCheck ? true : $wgRequest->checkSessionCookie();
 737         }
 738
 739         /**
 740          * @private
 741          */
 742         function cookieRedirectCheck( $type ) {
 743                 global $wgOut;
 744
 745                 $titleObj = SpecialPage::getTitleFor( 'Userlogin' );
 746                 $check = $titleObj->getFullURL( 'wpCookieCheck='.$type );
 747
 748                 return $wgOut->redirect( $check );
 749         }
 750
 751         /**
 752          * @private
 753          */
 754         function onCookieRedirectCheck( $type ) {
 755                 global $wgUser;
 756
 757                 if ( !$this->hasSessionCookie() ) {
 758                         if ( $type == 'new' ) {
 759                                 return $this->mainLoginForm( wfMsg( 'nocookiesnew' ) );
 760                         } else if ( $type == 'login' ) {
 761                                 return $this->mainLoginForm( wfMsg( 'nocookieslogin' ) );
 762                         } else {
 763                                 # shouldn't happen
 764                                 return $this->mainLoginForm( wfMsg( 'error' ) );
 765                         }
 766                 } else {
 767                         return $this->successfulLogin( wfMsg( 'loginsuccess', $wgUser->getName() ) );
 768                 }
 769         }
 770
 771         /**
 772          * @private
 773          */
 774         function throttleHit( $limit ) {
 775                 global $wgOut;
 776
 777                 $wgOut->addWikiText( wfMsg( 'acct_creation_throttle_hit', $limit ) );
 778         }
 779
 780         /**
 781          * Produce a bar of links which allow the user to select another language
 782          * during login/registration but retain "returnto"
 783          *
 784          * @return string
 785          */
 786         function makeLanguageSelector() {
 787                 $msg = wfMsgForContent( 'loginlanguagelinks' );
 788                 if( $msg != '' && !wfEmptyMsg( 'loginlanguagelinks', $msg ) ) {
 789                         $langs = explode( "\n", $msg );
 790                         $links = array();
 791                         foreach( $langs as $lang ) {
 792                                 $lang = trim( $lang, '* ' );
 793                                 $parts = explode( '|', $lang );
 794                                 $links[] = $this->makeLanguageSelectorLink( $parts[0], $parts[1] );
 795                         }
 796                         return count( $links ) > 0 ? wfMsgHtml( 'loginlanguagelabel', implode( ' | ', $links ) ) : '';
 797                 } else {
 798                         return '';
 799                 }
 800         }
 801
 802         /**
 803          * Create a language selector link for a particular language
 804          * Links back to this page preserving type and returnto
 805          *
 806          * @param $text Link text
 807          * @param $lang Language code
 808          */
 809         function makeLanguageSelectorLink( $text, $lang ) {
 810                 global $wgUser;
 811                 $self = SpecialPage::getTitleFor( 'Userlogin' );
 812                 $attr[] = 'uselang=' . $lang;
 813                 if( $this->mType == 'signup' )
 814                         $attr[] = 'type=signup';
 815                 if( $this->mReturnTo )
 816                         $attr[] = 'returnto=' . $this->mReturnTo;
 817                 $skin = $wgUser->getSkin();
 818                 return $skin->makeKnownLinkObj( $self, htmlspecialchars( $text ), implode( '&', $attr ) );
 819         }
 820 }
 821 ?>