includes/SpecialUserlogin.php

   1 <?php
   2 /**
   3  *
   4  * @addtogroup SpecialPage
   5  */
   6
   7 /**
   8  * constructor
   9  */
  10 function wfSpecialUserlogin() {
  11         global $wgRequest;
  12         if( session_id() == '' ) {
  13                 wfSetupSession();
  14         }
  15
  16         $form = new LoginForm( $wgRequest );
  17         $form->execute();
  18 }
  19
  20 /**
  21  * implements Special:Login
  22  * @addtogroup SpecialPage
  23  */
  24 class LoginForm {
  25
  26         const SUCCESS = 0;
  27         const NO_NAME = 1;
  28         const ILLEGAL = 2;
  29         const WRONG_PLUGIN_PASS = 3;
  30         const NOT_EXISTS = 4;
  31         const WRONG_PASS = 5;
  32         const EMPTY_PASS = 6;
  33         const RESET_PASS = 7;
  34         const ABORTED = 8;
  35
  36         var $mName, $mPassword, $mRetype, $mReturnTo, $mCookieCheck, $mPosted;
  37         var $mAction, $mCreateaccount, $mCreateaccountMail, $mMailmypassword;
  38         var $mLoginattempt, $mRemember, $mEmail, $mDomain, $mLanguage;
  39
  40         /**
  41          * Constructor
  42          * @param WebRequest $request A WebRequest object passed by reference
  43          */
  44         function LoginForm( &$request ) {
  45                 global $wgLang, $wgAllowRealName, $wgEnableEmail;
  46                 global $wgAuth;
  47
  48                 $this->mType = $request->getText( 'type' );
  49                 $this->mName = $request->getText( 'wpName' );
  50                 $this->mPassword = $request->getText( 'wpPassword' );
  51                 $this->mRetype = $request->getText( 'wpRetype' );
  52                 $this->mDomain = $request->getText( 'wpDomain' );
  53                 $this->mReturnTo = $request->getVal( 'returnto' );
  54                 $this->mCookieCheck = $request->getVal( 'wpCookieCheck' );
  55                 $this->mPosted = $request->wasPosted();
  56                 $this->mCreateaccount = $request->getCheck( 'wpCreateaccount' );
  57                 $this->mCreateaccountMail = $request->getCheck( 'wpCreateaccountMail' )
  58                                             && $wgEnableEmail;
  59                 $this->mMailmypassword = $request->getCheck( 'wpMailmypassword' )
  60                                          && $wgEnableEmail;
  61                 $this->mLoginattempt = $request->getCheck( 'wpLoginattempt' );
  62                 $this->mAction = $request->getVal( 'action' );
  63                 $this->mRemember = $request->getCheck( 'wpRemember' );
  64                 $this->mLanguage = $request->getText( 'uselang' );
  65
  66                 if( $wgEnableEmail ) {
  67                         $this->mEmail = $request->getText( 'wpEmail' );
  68                 } else {
  69                         $this->mEmail = '';
  70                 }
  71                 if( $wgAllowRealName ) {
  72                     $this->mRealName = $request->getText( 'wpRealName' );
  73                 } else {
  74                     $this->mRealName = '';
  75                 }
  76
  77                 if( !$wgAuth->validDomain( $this->mDomain ) ) {
  78                         $this->mDomain = 'invaliddomain';
  79                 }
  80                 $wgAuth->setDomain( $this->mDomain );
  81
  82                 # When switching accounts, it sucks to get automatically logged out
  83                 if( $this->mReturnTo == $wgLang->specialPage( 'Userlogout' ) ) {
  84                         $this->mReturnTo = '';
  85                 }
  86         }
  87
  88         function execute() {
  89                 if ( !is_null( $this->mCookieCheck ) ) {
  90                         $this->onCookieRedirectCheck( $this->mCookieCheck );
  91                         return;
  92                 } else if( $this->mPosted ) {
  93                         if( $this->mCreateaccount ) {
  94                                 return $this->addNewAccount();
  95                         } else if ( $this->mCreateaccountMail ) {
  96                                 return $this->addNewAccountMailPassword();
  97                         } else if ( $this->mMailmypassword ) {
  98                                 return $this->mailPassword();
  99                         } else if ( ( 'submitlogin' == $this->mAction ) || $this->mLoginattempt ) {
 100                                 return $this->processLogin();
 101                         }
 102                 }
 103                 $this->mainLoginForm( '' );
 104         }
 105
 106         /**
 107          * @private
 108          */
 109         function addNewAccountMailPassword() {
 110                 global $wgOut;
 111
 112                 if ('' == $this->mEmail) {
 113                         $this->mainLoginForm( wfMsg( 'noemail', htmlspecialchars( $this->mName ) ) );
 114                         return;
 115                 }
 116
 117                 $u = $this->addNewaccountInternal();
 118
 119                 if ($u == NULL) {
 120                         return;
 121                 }
 122
 123                 // Wipe the initial password and mail a temporary one
 124                 $u->setPassword( null );
 125                 $u->saveSettings();
 126                 $result = $this->mailPasswordInternal( $u, false );
 127
 128                 wfRunHooks( 'AddNewAccount', array( $u ) );
 129
 130                 $wgOut->setPageTitle( wfMsg( 'accmailtitle' ) );
 131                 $wgOut->setRobotpolicy( 'noindex,nofollow' );
 132                 $wgOut->setArticleRelated( false );
 133
 134                 if( WikiError::isError( $result ) ) {
 135                         $this->mainLoginForm( wfMsg( 'mailerror', $result->getMessage() ) );
 136                 } else {
 137                         $wgOut->addWikiText( wfMsg( 'accmailtext', $u->getName(), $u->getEmail() ) );
 138                         $wgOut->returnToMain( false );
 139                 }
 140                 $u = 0;
 141         }
 142
 143
 144         /**
 145          * @private
 146          */
 147         function addNewAccount() {
 148                 global $wgUser, $wgEmailAuthentication;
 149
 150                 # Create the account and abort if there's a problem doing so
 151                 $u = $this->addNewAccountInternal();
 152                 if( $u == NULL )
 153                         return;
 154
 155                 # If we showed up language selection links, and one was in use, be
 156                 # smart (and sensible) and save that language as the user's preference
 157                 global $wgLoginLanguageSelector;
 158                 if( $wgLoginLanguageSelector && $this->mLanguage )
 159                         $u->setOption( 'language', $this->mLanguage );
 160
 161                 # Save user settings and send out an email authentication message if needed
 162                 $u->saveSettings();
 163                 if( $wgEmailAuthentication && User::isValidEmailAddr( $u->getEmail() ) ) {
 164                         global $wgOut;
 165                         $error = $u->sendConfirmationMail();
 166                         if( WikiError::isError( $error ) ) {
 167                                 $wgOut->addWikiText( wfMsg( 'confirmemail_sendfailed', $error->getMessage() ) );
 168                         } else {
 169                                 $wgOut->addWikiText( wfMsg( 'confirmemail_oncreate' ) );
 170                         }
 171                 }
 172
 173                 # If not logged in, assume the new account as the current one and set session cookies
 174                 # then show a "welcome" message or a "need cookies" message as needed
 175                 if( $wgUser->isAnon() ) {
 176                         $wgUser = $u;
 177                         $wgUser->setCookies();
 178                         wfRunHooks( 'AddNewAccount', array( $wgUser ) );
 179                         if( $this->hasSessionCookie() ) {
 180                                 return $this->successfulLogin( wfMsg( 'welcomecreation', $wgUser->getName() ), false );
 181                         } else {
 182                                 return $this->cookieRedirectCheck( 'new' );
 183                         }
 184                 } else {
 185                         # Confirm that the account was created
 186                         global $wgOut;
 187                         $self = SpecialPage::getTitleFor( 'Userlogin' );
 188                         $wgOut->setPageTitle( wfMsgHtml( 'accountcreated' ) );
 189                         $wgOut->setArticleRelated( false );
 190                         $wgOut->setRobotPolicy( 'noindex,nofollow' );
 191                         $wgOut->addHtml( wfMsgWikiHtml( 'accountcreatedtext', $u->getName() ) );
 192                         $wgOut->returnToMain( false, $self );
 193                         wfRunHooks( 'AddNewAccount', array( $u ) );
 194                         return true;
 195                 }
 196         }
 197
 198         /**
 199          * @private
 200          */
 201         function addNewAccountInternal() {
 202                 global $wgUser, $wgOut;
 203                 global $wgEnableSorbs, $wgProxyWhitelist;
 204                 global $wgMemc, $wgAccountCreationThrottle;
 205                 global $wgAuth, $wgMinimalPasswordLength;
 206                 global $wgEmailConfirmToEdit;
 207
 208                 // If the user passes an invalid domain, something is fishy
 209                 if( !$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                         $wgOut->readOnlyPage();
 229                         return false;
 230                 }
 231
 232                 # Check permissions
 233                 if ( !$wgUser->isAllowed( 'createaccount' ) ) {
 234                         $this->userNotPrivilegedMessage();
 235                         return false;
 236                 } elseif ( $wgUser->isBlockedFromCreateAccount() ) {
 237                         $this->userBlockedMessage();
 238                         return false;
 239                 }
 240
 241                 $ip = wfGetIP();
 242                 if ( $wgEnableSorbs && !in_array( $ip, $wgProxyWhitelist ) &&
 243                   $wgUser->inSorbsBlacklist( $ip ) )
 244                 {
 245                         $this->mainLoginForm( wfMsg( 'sorbs_create_account_reason' ) . ' (' . htmlspecialchars( $ip ) . ')' );
 246                         return;
 247                 }
 248
 249                 # Now create a dummy user ($u) and check if it is valid
 250                 $name = trim( $this->mName );
 251                 $u = User::newFromName( $name, 'creatable' );
 252                 if ( is_null( $u ) ) {
 253                         $this->mainLoginForm( wfMsg( 'noname' ) );
 254                         return false;
 255                 }
 256
 257                 if ( 0 != $u->idForName() ) {
 258                         $this->mainLoginForm( wfMsg( 'userexists' ) );
 259                         return false;
 260                 }
 261
 262                 if ( 0 != strcmp( $this->mPassword, $this->mRetype ) ) {
 263                         $this->mainLoginForm( wfMsg( 'badretype' ) );
 264                         return false;
 265                 }
 266
 267                 if ( !$u->isValidPassword( $this->mPassword ) ) {
 268                         $this->mainLoginForm( wfMsg( 'passwordtooshort', $wgMinimalPasswordLength ) );
 269                         return false;
 270                 }
 271
 272                 # if you need a confirmed email address to edit, then obviously you need an email address.
 273                 if ( $wgEmailConfirmToEdit && empty( $this->mEmail ) ) {
 274                         $this->mainLoginForm( wfMsg( 'noemailtitle' ) );
 275                         return false;
 276                 }
 277
 278                 if( !empty( $this->mEmail ) && !User::isValidEmailAddr( $this->mEmail ) ) {
 279                         $this->mainLoginForm( wfMsg( 'invalidemailaddress' ) );
 280                         return false;
 281                 }
 282
 283                 # Set some additional data so the AbortNewAccount hook can be
 284                 # used for more than just username validation
 285                 $u->setEmail( $this->mEmail );
 286                 $u->setRealName( $this->mRealName );
 287
 288                 $abortError = '';
 289                 if( !wfRunHooks( 'AbortNewAccount', array( $u, &$abortError ) ) ) {
 290                         // Hook point to add extra creation throttles and blocks
 291                         wfDebug( "LoginForm::addNewAccountInternal: a hook blocked creation\n" );
 292                         $this->mainLoginForm( $abortError );
 293                         return false;
 294                 }
 295
 296                 if ( $wgAccountCreationThrottle && $wgUser->isPingLimitable() ) {
 297                         $key = wfMemcKey( 'acctcreate', 'ip', $ip );
 298                         $value = $wgMemc->incr( $key );
 299                         if ( !$value ) {
 300                                 $wgMemc->set( $key, 1, 86400 );
 301                         }
 302                         if ( $value > $wgAccountCreationThrottle ) {
 303                                 $this->throttleHit( $wgAccountCreationThrottle );
 304                                 return false;
 305                         }
 306                 }
 307
 308                 if( !$wgAuth->addUser( $u, $this->mPassword, $this->mEmail, $this->mRealName ) ) {
 309                         $this->mainLoginForm( wfMsg( 'externaldberror' ) );
 310                         return false;
 311                 }
 312
 313                 return $this->initUser( $u, false );
 314         }
 315
 316         /**
 317          * Actually add a user to the database.
 318          * Give it a User object that has been initialised with a name.
 319          *
 320          * @param $u User object.
 321          * @param $autocreate boolean -- true if this is an autocreation via auth plugin
 322          * @return User object.
 323          * @private
 324          */
 325         function initUser( $u, $autocreate ) {
 326                 global $wgAuth;
 327
 328                 $u->addToDatabase();
 329
 330                 if ( $wgAuth->allowPasswordChange() ) {
 331                         $u->setPassword( $this->mPassword );
 332                 }
 333
 334                 $u->setEmail( $this->mEmail );
 335                 $u->setRealName( $this->mRealName );
 336                 $u->setToken();
 337
 338                 $wgAuth->initUser( $u, $autocreate );
 339
 340                 $u->setOption( 'rememberpassword', $this->mRemember ? 1 : 0 );
 341                 $u->saveSettings();
 342
 343                 # Update user count
 344                 $ssUpdate = new SiteStatsUpdate( 0, 0, 0, 0, 1 );
 345                 $ssUpdate->doUpdate();
 346
 347                 return $u;
 348         }
 349
 350         /**
 351          * Internally authenticate the login request.
 352          *
 353          * This may create a local account as a side effect if the
 354          * authentication plugin allows transparent local account
 355          * creation.
 356          *
 357          * @public
 358          */
 359         function authenticateUserData() {
 360                 global $wgUser, $wgAuth;
 361                 if ( '' == $this->mName ) {
 362                         return self::NO_NAME;
 363                 }
 364                 $u = User::newFromName( $this->mName );
 365                 if( is_null( $u ) || !User::isUsableName( $u->getName() ) ) {
 366                         return self::ILLEGAL;
 367                 }
 368                 if ( 0 == $u->getID() ) {
 369                         global $wgAuth;
 370                         /**
 371                          * If the external authentication plugin allows it,
 372                          * automatically create a new account for users that
 373                          * are externally defined but have not yet logged in.
 374                          */
 375                         if ( $wgAuth->autoCreate() && $wgAuth->userExists( $u->getName() ) ) {
 376                                 if ( $wgAuth->authenticate( $u->getName(), $this->mPassword ) ) {
 377                                         $u = $this->initUser( $u, true );
 378                                 } else {
 379                                         return self::WRONG_PLUGIN_PASS;
 380                                 }
 381                         } else {
 382                                 return self::NOT_EXISTS;
 383                         }
 384                 } else {
 385                         $u->load();
 386                 }
 387
 388                 // Give general extensions, such as a captcha, a chance to abort logins
 389                 $abort = self::ABORTED;
 390                 if( !wfRunHooks( 'AbortLogin', array( $u, $this->mPassword, &$abort ) ) ) {
 391                         return $abort;
 392                 }
 393
 394                 if (!$u->checkPassword( $this->mPassword )) {
 395                         if( $u->checkTemporaryPassword( $this->mPassword ) ) {
 396                                 // The e-mailed temporary password should not be used
 397                                 // for actual logins; that's a very sloppy habit,
 398                                 // and insecure if an attacker has a few seconds to
 399                                 // click "search" on someone's open mail reader.
 400                                 //
 401                                 // Allow it to be used only to reset the password
 402                                 // a single time to a new value, which won't be in
 403                                 // the user's e-mail archives.
 404                                 //
 405                                 // For backwards compatibility, we'll still recognize
 406                                 // it at the login form to minimize surprises for
 407                                 // people who have been logging in with a temporary
 408                                 // password for some time.
 409                                 //
 410                                 // As a side-effect, we can authenticate the user's
 411                                 // e-mail address if it's not already done, since
 412                                 // the temporary password was sent via e-mail.
 413                                 //
 414                                 if( !$u->isEmailConfirmed() ) {
 415                                         $u->confirmEmail();
 416                                 }
 417
 418                                 // At this point we just return an appropriate code
 419                                 // indicating that the UI should show a password
 420                                 // reset form; bot interfaces etc will probably just
 421                                 // fail cleanly here.
 422                                 //
 423                                 $retval = self::RESET_PASS;
 424                         } else {
 425                                 $retval = '' == $this->mPassword ? self::EMPTY_PASS : self::WRONG_PASS;
 426                         }
 427                 } else {
 428                         $wgAuth->updateUser( $u );
 429                         $wgUser = $u;
 430
 431                         $retval = self::SUCCESS;
 432                 }
 433                 wfRunHooks( 'LoginAuthenticateAudit', array( $u, $this->mPassword, $retval ) );
 434                 return $retval;
 435         }
 436
 437         function processLogin() {
 438                 global $wgUser, $wgAuth;
 439
 440                 switch ($this->authenticateUserData())
 441                 {
 442                         case self::SUCCESS:
 443                                 # We've verified now, update the real record
 444                                 if( (bool)$this->mRemember != (bool)$wgUser->getOption( 'rememberpassword' ) ) {
 445                                         $wgUser->setOption( 'rememberpassword', $this->mRemember ? 1 : 0 );
 446                                         $wgUser->saveSettings();
 447                                 } else {
 448                                         $wgUser->invalidateCache();
 449                                 }
 450                                 $wgUser->setCookies();
 451
 452                                 if( $this->hasSessionCookie() ) {
 453                                         return $this->successfulLogin( wfMsg( 'loginsuccess', $wgUser->getName() ) );
 454                                 } else {
 455                                         return $this->cookieRedirectCheck( 'login' );
 456                                 }
 457                                 break;
 458
 459                         case self::NO_NAME:
 460                         case self::ILLEGAL:
 461                                 $this->mainLoginForm( wfMsg( 'noname' ) );
 462                                 break;
 463                         case self::WRONG_PLUGIN_PASS:
 464                                 $this->mainLoginForm( wfMsg( 'wrongpassword' ) );
 465                                 break;
 466                         case self::NOT_EXISTS:
 467                                 $this->mainLoginForm( wfMsg( 'nosuchuser', htmlspecialchars( $this->mName ) ) );
 468                                 break;
 469                         case self::WRONG_PASS:
 470                                 $this->mainLoginForm( wfMsg( 'wrongpassword' ) );
 471                                 break;
 472                         case self::EMPTY_PASS:
 473                                 $this->mainLoginForm( wfMsg( 'wrongpasswordempty' ) );
 474                                 break;
 475                         case self::RESET_PASS:
 476                                 $this->resetLoginForm( wfMsg( 'resetpass_announce' ) );
 477                                 break;
 478                         default:
 479                                 wfDebugDieBacktrace( "Unhandled case value" );
 480                 }
 481         }
 482
 483         function resetLoginForm( $error ) {
 484                 global $wgOut;
 485                 $wgOut->addWikiText( "<div class=\"errorbox\">$error</div>" );
 486                 $reset = new PasswordResetForm( $this->mName, $this->mPassword );
 487                 $reset->execute();
 488         }
 489
 490         /**
 491          * @private
 492          */
 493         function mailPassword() {
 494                 global $wgUser, $wgOut, $wgAuth;
 495
 496                 if( !$wgAuth->allowPasswordChange() ) {
 497                         $this->mainLoginForm( wfMsg( 'resetpass_forbidden' ) );
 498                         return;
 499                 }
 500
 501                 # Check against blocked IPs
 502                 # fixme -- should we not?
 503                 if( $wgUser->isBlocked() ) {
 504                         $this->mainLoginForm( wfMsg( 'blocked-mailpassword' ) );
 505                         return;
 506                 }
 507
 508                 # Check against the rate limiter
 509                 if( $wgUser->pingLimiter( 'mailpassword' ) ) {
 510                         $wgOut->rateLimited();
 511                         return;
 512                 }
 513
 514                 if ( '' == $this->mName ) {
 515                         $this->mainLoginForm( wfMsg( 'noname' ) );
 516                         return;
 517                 }
 518                 $u = User::newFromName( $this->mName );
 519                 if( is_null( $u ) ) {
 520                         $this->mainLoginForm( wfMsg( 'noname' ) );
 521                         return;
 522                 }
 523                 if ( 0 == $u->getID() ) {
 524                         $this->mainLoginForm( wfMsg( 'nosuchuser', $u->getName() ) );
 525                         return;
 526                 }
 527
 528                 # Check against password throttle
 529                 if ( $u->isPasswordReminderThrottled() ) {
 530                         global $wgPasswordReminderResendTime;
 531                         # Round the time in hours to 3 d.p., in case someone is specifying minutes or seconds.
 532                         $this->mainLoginForm( wfMsg( 'throttled-mailpassword',
 533                                 round( $wgPasswordReminderResendTime, 3 ) ) );
 534                         return;
 535                 }
 536
 537                 $result = $this->mailPasswordInternal( $u, true );
 538                 if( WikiError::isError( $result ) ) {
 539                         $this->mainLoginForm( wfMsg( 'mailerror', $result->getMessage() ) );
 540                 } else {
 541                         $this->mainLoginForm( wfMsg( 'passwordsent', $u->getName() ), 'success' );
 542                 }
 543         }
 544
 545
 546         /**
 547          * @return mixed true on success, WikiError on failure
 548          * @private
 549          */
 550         function mailPasswordInternal( $u, $throttle = true ) {
 551                 global $wgCookiePath, $wgCookieDomain, $wgCookiePrefix, $wgCookieSecure;
 552                 global $wgServer, $wgScript;
 553
 554                 if ( '' == $u->getEmail() ) {
 555                         return new WikiError( wfMsg( 'noemail', $u->getName() ) );
 556                 }
 557
 558                 $np = $u->randomPassword();
 559                 $u->setNewpassword( $np, $throttle );
 560
 561                 setcookie( "{$wgCookiePrefix}Token", '', time() - 3600, $wgCookiePath, $wgCookieDomain, $wgCookieSecure );
 562
 563                 $u->saveSettings();
 564
 565                 $ip = wfGetIP();
 566                 if ( '' == $ip ) { $ip = '(Unknown)'; }
 567
 568                 $m = wfMsg( 'passwordremindertext', $ip, $u->getName(), $np, $wgServer . $wgScript );
 569
 570                 $result = $u->sendMail( wfMsg( 'passwordremindertitle' ), $m );
 571                 return $result;
 572         }
 573
 574
 575         /**
 576          * @param string $msg Message that will be shown on success
 577          * @param bool $auto Toggle auto-redirect to main page; default true
 578          * @private
 579          */
 580         function successfulLogin( $msg, $auto = true ) {
 581                 global $wgUser;
 582                 global $wgOut;
 583
 584                 # Run any hooks; ignore results
 585
 586                 wfRunHooks('UserLoginComplete', array(&$wgUser));
 587
 588                 $wgOut->setPageTitle( wfMsg( 'loginsuccesstitle' ) );
 589                 $wgOut->setRobotpolicy( 'noindex,nofollow' );
 590                 $wgOut->setArticleRelated( false );
 591                 $wgOut->addWikiText( $msg );
 592                 if ( !empty( $this->mReturnTo ) ) {
 593                         $wgOut->returnToMain( $auto, $this->mReturnTo );
 594                 } else {
 595                         $wgOut->returnToMain( $auto );
 596                 }
 597         }
 598
 599         /** */
 600         function userNotPrivilegedMessage() {
 601                 global $wgOut;
 602
 603                 $wgOut->setPageTitle( wfMsg( 'whitelistacctitle' ) );
 604                 $wgOut->setRobotpolicy( 'noindex,nofollow' );
 605                 $wgOut->setArticleRelated( false );
 606
 607                 $wgOut->addWikiText( wfMsg( 'whitelistacctext' ) );
 608
 609                 $wgOut->returnToMain( false );
 610         }
 611
 612         /** */
 613         function userBlockedMessage() {
 614                 global $wgOut, $wgUser;
 615
 616                 # Let's be nice about this, it's likely that this feature will be used
 617                 # for blocking large numbers of innocent people, e.g. range blocks on
 618                 # schools. Don't blame it on the user. There's a small chance that it
 619                 # really is the user's fault, i.e. the username is blocked and they
 620                 # haven't bothered to log out before trying to create an account to
 621                 # evade it, but we'll leave that to their guilty conscience to figure
 622                 # out.
 623
 624                 $wgOut->setPageTitle( wfMsg( 'cantcreateaccounttitle' ) );
 625                 $wgOut->setRobotpolicy( 'noindex,nofollow' );
 626                 $wgOut->setArticleRelated( false );
 627
 628                 $ip = wfGetIP();
 629                 $blocker = User::whoIs( $wgUser->mBlock->mBy );
 630                 $block_reason = $wgUser->mBlock->mReason;
 631
 632                 $wgOut->addWikiText( wfMsg( 'cantcreateaccount-text', $ip, $block_reason, $blocker ) );
 633                 $wgOut->returnToMain( false );
 634         }
 635
 636         /**
 637          * @private
 638          */
 639         function mainLoginForm( $msg, $msgtype = 'error' ) {
 640                 global $wgUser, $wgOut, $wgAllowRealName, $wgEnableEmail;
 641                 global $wgCookiePrefix, $wgAuth, $wgLoginLanguageSelector;
 642                 global $wgAuth, $wgEmailConfirmToEdit;
 643
 644                 if ( $this->mType == 'signup' ) {
 645                         if ( !$wgUser->isAllowed( 'createaccount' ) ) {
 646                                 $this->userNotPrivilegedMessage();
 647                                 return;
 648                         } elseif ( $wgUser->isBlockedFromCreateAccount() ) {
 649                                 $this->userBlockedMessage();
 650                                 return;
 651                         }
 652                 }
 653
 654                 if ( '' == $this->mName ) {
 655                         if ( $wgUser->isLoggedIn() ) {
 656                                 $this->mName = $wgUser->getName();
 657                         } else {
 658                                 $this->mName = isset( $_COOKIE[$wgCookiePrefix.'UserName'] ) ? $_COOKIE[$wgCookiePrefix.'UserName'] : null;
 659                         }
 660                 }
 661
 662                 $titleObj = SpecialPage::getTitleFor( 'Userlogin' );
 663
 664                 if ( $this->mType == 'signup' ) {
 665                         $template = new UsercreateTemplate();
 666                         $q = 'action=submitlogin&type=signup';
 667                         $linkq = 'type=login';
 668                         $linkmsg = 'gotaccount';
 669                 } else {
 670                         $template = new UserloginTemplate();
 671                         $q = 'action=submitlogin&type=login';
 672                         $linkq = 'type=signup';
 673                         $linkmsg = 'nologin';
 674                 }
 675
 676                 if ( !empty( $this->mReturnTo ) ) {
 677                         $returnto = '&returnto=' . wfUrlencode( $this->mReturnTo );
 678                         $q .= $returnto;
 679                         $linkq .= $returnto;
 680                 }
 681
 682                 # Pass any language selection on to the mode switch link
 683                 if( $wgLoginLanguageSelector && $this->mLanguage )
 684                         $linkq .= '&uselang=' . $this->mLanguage;
 685
 686                 $link = '<a href="' . htmlspecialchars ( $titleObj->getLocalUrl( $linkq ) ) . '">';
 687                 $link .= wfMsgHtml( $linkmsg . 'link' );
 688                 $link .= '</a>';
 689
 690                 # Don't show a "create account" link if the user can't
 691                 if( $this->showCreateOrLoginLink( $wgUser ) )
 692                         $template->set( 'link', wfMsgHtml( $linkmsg, $link ) );
 693                 else
 694                         $template->set( 'link', '' );
 695
 696                 $template->set( 'header', '' );
 697                 $template->set( 'name', $this->mName );
 698                 $template->set( 'password', $this->mPassword );
 699                 $template->set( 'retype', $this->mRetype );
 700                 $template->set( 'email', $this->mEmail );
 701                 $template->set( 'realname', $this->mRealName );
 702                 $template->set( 'domain', $this->mDomain );
 703
 704                 $template->set( 'action', $titleObj->getLocalUrl( $q ) );
 705                 $template->set( 'message', $msg );
 706                 $template->set( 'messagetype', $msgtype );
 707                 $template->set( 'createemail', $wgEnableEmail && $wgUser->isLoggedIn() );
 708                 $template->set( 'userealname', $wgAllowRealName );
 709                 $template->set( 'useemail', $wgEnableEmail );
 710                 $template->set( 'emailrequired', $wgEmailConfirmToEdit );
 711                 $template->set( 'canreset', $wgAuth->allowPasswordChange() );
 712                 $template->set( 'remember', $wgUser->getOption( 'rememberpassword' ) or $this->mRemember  );
 713
 714                 # Prepare language selection links as needed
 715                 if( $wgLoginLanguageSelector ) {
 716                         $template->set( 'languages', $this->makeLanguageSelector() );
 717                         if( $this->mLanguage )
 718                                 $template->set( 'uselang', $this->mLanguage );
 719                 }
 720
 721                 // Give authentication and captcha plugins a chance to modify the form
 722                 $wgAuth->modifyUITemplate( $template );
 723                 if ( $this->mType == 'signup' ) {
 724                         wfRunHooks( 'UserCreateForm', array( &$template ) );
 725                 } else {
 726                         wfRunHooks( 'UserLoginForm', array( &$template ) );
 727                 }
 728
 729                 $wgOut->setPageTitle( wfMsg( 'userlogin' ) );
 730                 $wgOut->setRobotpolicy( 'noindex,nofollow' );
 731                 $wgOut->setArticleRelated( false );
 732                 $wgOut->disallowUserJs();  // just in case...
 733                 $wgOut->addTemplate( $template );
 734         }
 735
 736         /**
 737          * @private
 738          */
 739         function showCreateOrLoginLink( &$user ) {
 740                 if( $this->mType == 'signup' ) {
 741                         return( true );
 742                 } elseif( $user->isAllowed( 'createaccount' ) ) {
 743                         return( true );
 744                 } else {
 745                         return( false );
 746                 }
 747         }
 748
 749         /**
 750          * Check if a session cookie is present.
 751          *
 752          * This will not pick up a cookie set during _this_ request, but is
 753          * meant to ensure that the client is returning the cookie which was
 754          * set on a previous pass through the system.
 755          *
 756          * @private
 757          */
 758         function hasSessionCookie() {
 759                 global $wgDisableCookieCheck, $wgRequest;
 760                 return $wgDisableCookieCheck ? true : $wgRequest->checkSessionCookie();
 761         }
 762
 763         /**
 764          * @private
 765          */
 766         function cookieRedirectCheck( $type ) {
 767                 global $wgOut;
 768
 769                 $titleObj = SpecialPage::getTitleFor( 'Userlogin' );
 770                 $check = $titleObj->getFullURL( 'wpCookieCheck='.$type );
 771
 772                 return $wgOut->redirect( $check );
 773         }
 774
 775         /**
 776          * @private
 777          */
 778         function onCookieRedirectCheck( $type ) {
 779                 global $wgUser;
 780
 781                 if ( !$this->hasSessionCookie() ) {
 782                         if ( $type == 'new' ) {
 783                                 return $this->mainLoginForm( wfMsg( 'nocookiesnew' ) );
 784                         } else if ( $type == 'login' ) {
 785                                 return $this->mainLoginForm( wfMsg( 'nocookieslogin' ) );
 786                         } else {
 787                                 # shouldn't happen
 788                                 return $this->mainLoginForm( wfMsg( 'error' ) );
 789                         }
 790                 } else {
 791                         return $this->successfulLogin( wfMsg( 'loginsuccess', $wgUser->getName() ) );
 792                 }
 793         }
 794
 795         /**
 796          * @private
 797          */
 798         function throttleHit( $limit ) {
 799                 global $wgOut;
 800
 801                 $wgOut->addWikiText( wfMsg( 'acct_creation_throttle_hit', $limit ) );
 802         }
 803
 804         /**
 805          * Produce a bar of links which allow the user to select another language
 806          * during login/registration but retain "returnto"
 807          *
 808          * @return string
 809          */
 810         function makeLanguageSelector() {
 811                 $msg = wfMsgForContent( 'loginlanguagelinks' );
 812                 if( $msg != '' && !wfEmptyMsg( 'loginlanguagelinks', $msg ) ) {
 813                         $langs = explode( "\n", $msg );
 814                         $links = array();
 815                         foreach( $langs as $lang ) {
 816                                 $lang = trim( $lang, '* ' );
 817                                 $parts = explode( '|', $lang );
 818                                 $links[] = $this->makeLanguageSelectorLink( $parts[0], $parts[1] );
 819                         }
 820                         return count( $links ) > 0 ? wfMsgHtml( 'loginlanguagelabel', implode( ' | ', $links ) ) : '';
 821                 } else {
 822                         return '';
 823                 }
 824         }
 825
 826         /**
 827          * Create a language selector link for a particular language
 828          * Links back to this page preserving type and returnto
 829          *
 830          * @param $text Link text
 831          * @param $lang Language code
 832          */
 833         function makeLanguageSelectorLink( $text, $lang ) {
 834                 global $wgUser;
 835                 $self = SpecialPage::getTitleFor( 'Userlogin' );
 836                 $attr[] = 'uselang=' . $lang;
 837                 if( $this->mType == 'signup' )
 838                         $attr[] = 'type=signup';
 839                 if( $this->mReturnTo )
 840                         $attr[] = 'returnto=' . $this->mReturnTo;
 841                 $skin = $wgUser->getSkin();
 842                 return $skin->makeKnownLinkObj( $self, htmlspecialchars( $text ), implode( '&', $attr ) );
 843         }
 844 }
 845