includes/specials/SpecialUserlogin.php

   1 <?php
   2 /**
   3  * @file
   4  * @ingroup SpecialPage
   5  */
   6
   7 /**
   8  * constructor
   9  */
  10 function wfSpecialUserlogin( $par = '' ) {
  11         global $wgRequest;
  12         if( session_id() == '' ) {
  13                 wfSetupSession();
  14         }
  15
  16         $form = new LoginForm( $wgRequest, $par );
  17         $form->execute();
  18 }
  19
  20 /**
  21  * implements Special:Login
  22  * @ingroup 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         const CREATE_BLOCKED = 9;
  36         const THROTTLED = 10;
  37
  38         var $mName, $mPassword, $mRetype, $mReturnTo, $mCookieCheck, $mPosted;
  39         var $mAction, $mCreateaccount, $mCreateaccountMail, $mMailmypassword;
  40         var $mLoginattempt, $mRemember, $mEmail, $mDomain, $mLanguage;
  41         var $mSkipCookieCheck, $mReturnToQuery;
  42
  43         private $mExtUser = null;
  44
  45         /**
  46          * Constructor
  47          * @param WebRequest $request A WebRequest object passed by reference
  48          */
  49         function LoginForm( &$request, $par = '' ) {
  50                 global $wgAuth, $wgHiddenPrefs, $wgEnableEmail, $wgRedirectOnLogin;
  51
  52                 $this->mType = ( $par == 'signup' ) ? $par : $request->getText( 'type' ); # Check for [[Special:Userlogin/signup]]
  53                 $this->mName = $request->getText( 'wpName' );
  54                 $this->mPassword = $request->getText( 'wpPassword' );
  55                 $this->mRetype = $request->getText( 'wpRetype' );
  56                 $this->mDomain = $request->getText( 'wpDomain' );
  57                 $this->mReturnTo = $request->getVal( 'returnto' );
  58                 $this->mReturnToQuery = $request->getVal( 'returntoquery' );
  59                 $this->mCookieCheck = $request->getVal( 'wpCookieCheck' );
  60                 $this->mPosted = $request->wasPosted();
  61                 $this->mCreateaccount = $request->getCheck( 'wpCreateaccount' );
  62                 $this->mCreateaccountMail = $request->getCheck( 'wpCreateaccountMail' )
  63                                             && $wgEnableEmail;
  64                 $this->mMailmypassword = $request->getCheck( 'wpMailmypassword' )
  65                                          && $wgEnableEmail;
  66                 $this->mLoginattempt = $request->getCheck( 'wpLoginattempt' );
  67                 $this->mAction = $request->getVal( 'action' );
  68                 $this->mRemember = $request->getCheck( 'wpRemember' );
  69                 $this->mLanguage = $request->getText( 'uselang' );
  70                 $this->mSkipCookieCheck = $request->getCheck( 'wpSkipCookieCheck' );
  71
  72                 if ( $wgRedirectOnLogin ) {
  73                         $this->mReturnTo = $wgRedirectOnLogin;
  74                         $this->mReturnToQuery = '';
  75                 }
  76
  77                 if( $wgEnableEmail ) {
  78                         $this->mEmail = $request->getText( 'wpEmail' );
  79                 } else {
  80                         $this->mEmail = '';
  81                 }
  82                 if( !in_array( 'realname', $wgHiddenPrefs ) ) {
  83                     $this->mRealName = $request->getText( 'wpRealName' );
  84                 } else {
  85                     $this->mRealName = '';
  86                 }
  87
  88                 if( !$wgAuth->validDomain( $this->mDomain ) ) {
  89                         $this->mDomain = 'invaliddomain';
  90                 }
  91                 $wgAuth->setDomain( $this->mDomain );
  92
  93                 # When switching accounts, it sucks to get automatically logged out
  94                 $returnToTitle = Title::newFromText( $this->mReturnTo );
  95                 if( is_object( $returnToTitle ) && $returnToTitle->isSpecial( 'Userlogout' ) ) {
  96                         $this->mReturnTo = '';
  97                         $this->mReturnToQuery = '';
  98                 }
  99         }
 100
 101         function execute() {
 102                 if ( !is_null( $this->mCookieCheck ) ) {
 103                         $this->onCookieRedirectCheck( $this->mCookieCheck );
 104                         return;
 105                 } else if( $this->mPosted ) {
 106                         if( $this->mCreateaccount ) {
 107                                 return $this->addNewAccount();
 108                         } else if ( $this->mCreateaccountMail ) {
 109                                 return $this->addNewAccountMailPassword();
 110                         } else if ( $this->mMailmypassword ) {
 111                                 return $this->mailPassword();
 112                         } else if ( ( 'submitlogin' == $this->mAction ) || $this->mLoginattempt ) {
 113                                 return $this->processLogin();
 114                         }
 115                 }
 116                 $this->mainLoginForm( '' );
 117         }
 118
 119         /**
 120          * @private
 121          */
 122         function addNewAccountMailPassword() {
 123                 global $wgOut;
 124
 125                 if ('' == $this->mEmail) {
 126                         $this->mainLoginForm( wfMsg( 'noemail', htmlspecialchars( $this->mName ) ) );
 127                         return;
 128                 }
 129
 130                 $u = $this->addNewaccountInternal();
 131
 132                 if ($u == null) {
 133                         return;
 134                 }
 135
 136                 // Wipe the initial password and mail a temporary one
 137                 $u->setPassword( null );
 138                 $u->saveSettings();
 139                 $result = $this->mailPasswordInternal( $u, false, 'createaccount-title', 'createaccount-text' );
 140
 141                 wfRunHooks( 'AddNewAccount', array( $u, true ) );
 142                 $u->addNewUserLogEntry();
 143
 144                 $wgOut->setPageTitle( wfMsg( 'accmailtitle' ) );
 145                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
 146                 $wgOut->setArticleRelated( false );
 147
 148                 if( WikiError::isError( $result ) ) {
 149                         $this->mainLoginForm( wfMsg( 'mailerror', $result->getMessage() ) );
 150                 } else {
 151                         $wgOut->addWikiMsg( 'accmailtext', $u->getName(), $u->getEmail() );
 152                         $wgOut->returnToMain( false );
 153                 }
 154                 $u = 0;
 155         }
 156
 157
 158         /**
 159          * @private
 160          */
 161         function addNewAccount() {
 162                 global $wgUser, $wgEmailAuthentication;
 163
 164                 # Create the account and abort if there's a problem doing so
 165                 $u = $this->addNewAccountInternal();
 166                 if( $u == null )
 167                         return;
 168
 169                 # If we showed up language selection links, and one was in use, be
 170                 # smart (and sensible) and save that language as the user's preference
 171                 global $wgLoginLanguageSelector;
 172                 if( $wgLoginLanguageSelector && $this->mLanguage )
 173                         $u->setOption( 'language', $this->mLanguage );
 174
 175                 # Send out an email authentication message if needed
 176                 if( $wgEmailAuthentication && User::isValidEmailAddr( $u->getEmail() ) ) {
 177                         global $wgOut;
 178                         $error = $u->sendConfirmationMail();
 179                         if( WikiError::isError( $error ) ) {
 180                                 $wgOut->addWikiMsg( 'confirmemail_sendfailed', $error->getMessage() );
 181                         } else {
 182                                 $wgOut->addWikiMsg( 'confirmemail_oncreate' );
 183                         }
 184                 }
 185
 186                 # Save settings (including confirmation token)
 187                 $u->saveSettings();
 188
 189                 # If not logged in, assume the new account as the current one and set
 190                 # session cookies then show a "welcome" message or a "need cookies"
 191                 # message as needed
 192                 if( $wgUser->isAnon() ) {
 193                         $wgUser = $u;
 194                         $wgUser->setCookies();
 195                         wfRunHooks( 'AddNewAccount', array( $wgUser, false ) );
 196                         $wgUser->addNewUserLogEntry();
 197                         if( $this->hasSessionCookie() ) {
 198                                 return $this->successfulCreation();
 199                         } else {
 200                                 return $this->cookieRedirectCheck( 'new' );
 201                         }
 202                 } else {
 203                         # Confirm that the account was created
 204                         global $wgOut;
 205                         $self = SpecialPage::getTitleFor( 'Userlogin' );
 206                         $wgOut->setPageTitle( wfMsgHtml( 'accountcreated' ) );
 207                         $wgOut->setArticleRelated( false );
 208                         $wgOut->setRobotPolicy( 'noindex,nofollow' );
 209                         $wgOut->addHTML( wfMsgWikiHtml( 'accountcreatedtext', $u->getName() ) );
 210                         $wgOut->returnToMain( false, $self );
 211                         wfRunHooks( 'AddNewAccount', array( $u, false ) );
 212                         $u->addNewUserLogEntry();
 213                         return true;
 214                 }
 215         }
 216
 217         /**
 218          * @private
 219          */
 220         function addNewAccountInternal() {
 221                 global $wgUser, $wgOut;
 222                 global $wgMemc, $wgAccountCreationThrottle;
 223                 global $wgAuth, $wgMinimalPasswordLength;
 224                 global $wgEmailConfirmToEdit;
 225
 226                 // If the user passes an invalid domain, something is fishy
 227                 if( !$wgAuth->validDomain( $this->mDomain ) ) {
 228                         $this->mainLoginForm( wfMsg( 'wrongpassword' ) );
 229                         return false;
 230                 }
 231
 232                 // If we are not allowing users to login locally, we should be checking
 233                 // to see if the user is actually able to authenticate to the authenti-
 234                 // cation server before they create an account (otherwise, they can
 235                 // create a local account and login as any domain user). We only need
 236                 // to check this for domains that aren't local.
 237                 if( 'local' != $this->mDomain && '' != $this->mDomain ) {
 238                         if( !$wgAuth->canCreateAccounts() && ( !$wgAuth->userExists( $this->mName ) || !$wgAuth->authenticate( $this->mName, $this->mPassword ) ) ) {
 239                                 $this->mainLoginForm( wfMsg( 'wrongpassword' ) );
 240                                 return false;
 241                         }
 242                 }
 243
 244                 if ( wfReadOnly() ) {
 245                         $wgOut->readOnlyPage();
 246                         return false;
 247                 }
 248
 249                 # Check permissions
 250                 if ( !$wgUser->isAllowed( 'createaccount' ) ) {
 251                         $this->userNotPrivilegedMessage();
 252                         return false;
 253                 } elseif ( $wgUser->isBlockedFromCreateAccount() ) {
 254                         $this->userBlockedMessage();
 255                         return false;
 256                 }
 257
 258                 $ip = wfGetIP();
 259                 if ( $wgUser->isDnsBlacklisted( $ip, true /* check $wgProxyWhitelist */ ) ) {
 260                         $this->mainLoginForm( wfMsg( 'sorbs_create_account_reason' ) . ' (' . htmlspecialchars( $ip ) . ')' );
 261                         return;
 262                 }
 263
 264                 # Now create a dummy user ($u) and check if it is valid
 265                 $name = trim( $this->mName );
 266                 $u = User::newFromName( $name, 'creatable' );
 267                 if ( WikiError::isError( $u ) ) {
 268                         $this->mainLoginForm( wfMsg( $u->getMessage() ) );
 269                         return false;
 270                 }
 271
 272                 if ( !is_object( $u ) ) {
 273                         $this->mainLoginForm( wfMsg( 'noname' ) );
 274                         return false;
 275                 }
 276
 277                 if ( 0 != $u->idForName() ) {
 278                         $this->mainLoginForm( wfMsg( 'userexists' ) );
 279                         return false;
 280                 }
 281
 282                 if ( 0 != strcmp( $this->mPassword, $this->mRetype ) ) {
 283                         $this->mainLoginForm( wfMsg( 'badretype' ) );
 284                         return false;
 285                 }
 286
 287                 # check for minimal password length
 288                 $valid = $u->getPasswordValidity( $this->mPassword );
 289                 if ( $valid !== true ) {
 290                         if ( !$this->mCreateaccountMail ) {
 291                                 $this->mainLoginForm( wfMsgExt( $valid, array( 'parsemag' ), $wgMinimalPasswordLength ) );
 292                                 return false;
 293                         } else {
 294                                 # do not force a password for account creation by email
 295                                 # set invalid password, it will be replaced later by a random generated password
 296                                 $this->mPassword = null;
 297                         }
 298                 }
 299
 300                 # if you need a confirmed email address to edit, then obviously you
 301                 # need an email address.
 302                 if ( $wgEmailConfirmToEdit && empty( $this->mEmail ) ) {
 303                         $this->mainLoginForm( wfMsg( 'noemailtitle' ) );
 304                         return false;
 305                 }
 306
 307                 if( !empty( $this->mEmail ) && !User::isValidEmailAddr( $this->mEmail ) ) {
 308                         $this->mainLoginForm( wfMsg( 'invalidemailaddress' ) );
 309                         return false;
 310                 }
 311
 312                 # Set some additional data so the AbortNewAccount hook can be used for
 313                 # more than just username validation
 314                 $u->setEmail( $this->mEmail );
 315                 $u->setRealName( $this->mRealName );
 316
 317                 $abortError = '';
 318                 if( !wfRunHooks( 'AbortNewAccount', array( $u, &$abortError ) ) ) {
 319                         // Hook point to add extra creation throttles and blocks
 320                         wfDebug( "LoginForm::addNewAccountInternal: a hook blocked creation\n" );
 321                         $this->mainLoginForm( $abortError );
 322                         return false;
 323                 }
 324
 325                 if ( $wgAccountCreationThrottle && $wgUser->isPingLimitable() ) {
 326                         $key = wfMemcKey( 'acctcreate', 'ip', $ip );
 327                         $value = $wgMemc->get( $key );
 328                         if ( !$value ) {
 329                                 $wgMemc->set( $key, 0, 86400 );
 330                         }
 331                         if ( $value >= $wgAccountCreationThrottle ) {
 332                                 $this->throttleHit( $wgAccountCreationThrottle );
 333                                 return false;
 334                         }
 335                         $wgMemc->incr( $key );
 336                 }
 337
 338                 if( !$wgAuth->addUser( $u, $this->mPassword, $this->mEmail, $this->mRealName ) ) {
 339                         $this->mainLoginForm( wfMsg( 'externaldberror' ) );
 340                         return false;
 341                 }
 342
 343                 return $this->initUser( $u, false );
 344         }
 345
 346         /**
 347          * Actually add a user to the database.
 348          * Give it a User object that has been initialised with a name.
 349          *
 350          * @param $u User object.
 351          * @param $autocreate boolean -- true if this is an autocreation via auth plugin
 352          * @return User object.
 353          * @private
 354          */
 355         function initUser( $u, $autocreate ) {
 356                 global $wgAuth;
 357
 358                 $u->addToDatabase();
 359
 360                 if ( $wgAuth->allowPasswordChange() ) {
 361                         $u->setPassword( $this->mPassword );
 362                 }
 363
 364                 $u->setEmail( $this->mEmail );
 365                 $u->setRealName( $this->mRealName );
 366                 $u->setToken();
 367
 368                 $wgAuth->initUser( $u, $autocreate );
 369
 370                 if ( $this->mExtUser ) {
 371                         $this->mExtUser->linkToLocal( $u->getId() );
 372                         $email = $this->mExtUser->getPref( 'emailaddress' );
 373                         if ( $email && !$this->mEmail ) {
 374                                 $u->setEmail( $email );
 375                         }
 376                 }
 377
 378                 $u->setOption( 'rememberpassword', $this->mRemember ? 1 : 0 );
 379                 $u->saveSettings();
 380
 381                 # Update user count
 382                 $ssUpdate = new SiteStatsUpdate( 0, 0, 0, 0, 1 );
 383                 $ssUpdate->doUpdate();
 384
 385                 return $u;
 386         }
 387
 388         /**
 389          * Internally authenticate the login request.
 390          *
 391          * This may create a local account as a side effect if the
 392          * authentication plugin allows transparent local account
 393          * creation.
 394          */
 395         public function authenticateUserData() {
 396                 global $wgUser, $wgAuth;
 397                 if ( '' == $this->mName ) {
 398                         return self::NO_NAME;
 399                 }
 400
 401                 global $wgPasswordAttemptThrottle;
 402
 403                 $throttleCount = 0;
 404                 if ( is_array( $wgPasswordAttemptThrottle ) ) {
 405                         $throttleKey = wfMemcKey( 'password-throttle', wfGetIP(), md5( $this->mName ) );
 406                         $count = $wgPasswordAttemptThrottle['count'];
 407                         $period = $wgPasswordAttemptThrottle['seconds'];
 408
 409                         global $wgMemc;
 410                         $throttleCount = $wgMemc->get( $throttleKey );
 411                         if ( !$throttleCount ) {
 412                                 $wgMemc->add( $throttleKey, 1, $period ); // start counter
 413                         } else if ( $throttleCount < $count ) {
 414                                 $wgMemc->incr($throttleKey);
 415                         } else if ( $throttleCount >= $count ) {
 416                                 return self::THROTTLED;
 417                         }
 418                 }
 419
 420                 // Load $wgUser now, and check to see if we're logging in as the same
 421                 // name. This is necessary because loading $wgUser (say by calling
 422                 // getName()) calls the UserLoadFromSession hook, which potentially
 423                 // creates the user in the database. Until we load $wgUser, checking
 424                 // for user existence using User::newFromName($name)->getId() below
 425                 // will effectively be using stale data.
 426                 if ( $wgUser->getName() === $this->mName ) {
 427                         wfDebug( __METHOD__.": already logged in as {$this->mName}\n" );
 428                         return self::SUCCESS;
 429                 }
 430
 431                 $this->mExtUser = ExternalUser::newFromName( $this->mName );
 432
 433                 # TODO: Allow some magic here for invalid external names, e.g., let the
 434                 # user choose a different wiki name.
 435                 $u = User::newFromName( $this->mName );
 436                 if( is_null( $u ) || !User::isUsableName( $u->getName() ) ) {
 437                         return self::ILLEGAL;
 438                 }
 439
 440                 $isAutoCreated = false;
 441                 if ( 0 == $u->getID() ) {
 442                         $status = $this->attemptAutoCreate( $u );
 443                         if ( $status !== self::SUCCESS ) {
 444                                 return $status;
 445                         } else {
 446                                 $isAutoCreated = true;
 447                         }
 448                 } else {
 449                         global $wgExternalAuthType, $wgAutocreatePolicy;
 450                         if ( $wgExternalAuthType && $wgAutocreatePolicy != 'never'
 451                         && is_object( $this->mExtUser )
 452                         && $this->mExtUser->authenticate( $this->mPassword ) ) {
 453                                 # The external user and local user have the same name and
 454                                 # password, so we assume they're the same.
 455                                 $this->mExtUser->linkToLocal( $u->getID() );
 456                         }
 457
 458                         $u->load();
 459                 }
 460
 461                 // Give general extensions, such as a captcha, a chance to abort logins
 462                 $abort = self::ABORTED;
 463                 if( !wfRunHooks( 'AbortLogin', array( $u, $this->mPassword, &$abort ) ) ) {
 464                         return $abort;
 465                 }
 466
 467                 if (!$u->checkPassword( $this->mPassword )) {
 468                         if( $u->checkTemporaryPassword( $this->mPassword ) ) {
 469                                 // The e-mailed temporary password should not be used for actu-
 470                                 // al logins; that's a very sloppy habit, and insecure if an
 471                                 // attacker has a few seconds to click "search" on someone's o-
 472                                 // pen mail reader.
 473                                 //
 474                                 // Allow it to be used only to reset the password a single time
 475                                 // to a new value, which won't be in the user's e-mail ar-
 476                                 // chives.
 477                                 //
 478                                 // For backwards compatibility, we'll still recognize it at the
 479                                 // login form to minimize surprises for people who have been
 480                                 // logging in with a temporary password for some time.
 481                                 //
 482                                 // As a side-effect, we can authenticate the user's e-mail ad-
 483                                 // dress if it's not already done, since the temporary password
 484                                 // was sent via e-mail.
 485                                 if( !$u->isEmailConfirmed() ) {
 486                                         $u->confirmEmail();
 487                                         $u->saveSettings();
 488                                 }
 489
 490                                 // At this point we just return an appropriate code/ indicating
 491                                 // that the UI should show a password reset form; bot inter-
 492                                 // faces etc will probably just fail cleanly here.
 493                                 $retval = self::RESET_PASS;
 494                         } else {
 495                                 $retval = '' == $this->mPassword ? self::EMPTY_PASS : self::WRONG_PASS;
 496                         }
 497                 } else {
 498                         $wgAuth->updateUser( $u );
 499                         $wgUser = $u;
 500
 501                         // Please reset throttle for successful logins, thanks!
 502                         if($throttleCount) {
 503                                 $wgMemc->delete($throttleKey);
 504                         }
 505
 506                         if ( $isAutoCreated ) {
 507                                 // Must be run after $wgUser is set, for correct new user log
 508                                 wfRunHooks( 'AuthPluginAutoCreate', array( $wgUser ) );
 509                         }
 510
 511                         $retval = self::SUCCESS;
 512                 }
 513                 wfRunHooks( 'LoginAuthenticateAudit', array( $u, $this->mPassword, $retval ) );
 514                 return $retval;
 515         }
 516
 517         /**
 518          * Attempt to automatically create a user on login. Only succeeds if there
 519          * is an external authentication method which allows it.
 520          * @return integer Status code
 521          */
 522         function attemptAutoCreate( $user ) {
 523                 global $wgAuth, $wgUser, $wgAutocreatePolicy;
 524
 525                 if ( $wgUser->isBlockedFromCreateAccount() ) {
 526                         wfDebug( __METHOD__.": user is blocked from account creation\n" );
 527                         return self::CREATE_BLOCKED;
 528                 }
 529
 530                 /**
 531                  * If the external authentication plugin allows it, automatically cre-
 532                  * ate a new account for users that are externally defined but have not
 533                  * yet logged in.
 534                  */
 535                 if ( $this->mExtUser ) {
 536                         # mExtUser is neither null nor false, so use the new ExternalAuth
 537                         # system.
 538                         if ( $wgAutocreatePolicy == 'never' ) {
 539                                 return self::NOT_EXISTS;
 540                         }
 541                         if ( !$this->mExtUser->authenticate( $this->mPassword ) ) {
 542                                 return self::WRONG_PLUGIN_PASS;
 543                         }
 544                 } else {
 545                         # Old AuthPlugin.
 546                         if ( !$wgAuth->autoCreate() ) {
 547                                 return self::NOT_EXISTS;
 548                         }
 549                         if ( !$wgAuth->userExists( $user->getName() ) ) {
 550                                 wfDebug( __METHOD__.": user does not exist\n" );
 551                                 return self::NOT_EXISTS;
 552                         }
 553                         if ( !$wgAuth->authenticate( $user->getName(), $this->mPassword ) ) {
 554                                 wfDebug( __METHOD__.": \$wgAuth->authenticate() returned false, aborting\n" );
 555                                 return self::WRONG_PLUGIN_PASS;
 556                         }
 557                 }
 558
 559                 wfDebug( __METHOD__.": creating account\n" );
 560                 $user = $this->initUser( $user, true );
 561                 return self::SUCCESS;
 562         }
 563
 564         function processLogin() {
 565                 global $wgUser, $wgAuth;
 566
 567                 switch ( $this->authenticateUserData() ) {
 568                         case self::SUCCESS:
 569                                 # We've verified now, update the real record
 570                                 if( (bool)$this->mRemember != (bool)$wgUser->getOption( 'rememberpassword' ) ) {
 571                                         $wgUser->setOption( 'rememberpassword', $this->mRemember ? 1 : 0 );
 572                                         $wgUser->saveSettings();
 573                                 } else {
 574                                         $wgUser->invalidateCache();
 575                                 }
 576                                 $wgUser->setCookies();
 577
 578                                 // Reset the throttle
 579                                 $key = wfMemcKey( 'password-throttle', wfGetIP(), md5( $this->mName ) );
 580                                 global $wgMemc;
 581                                 $wgMemc->delete( $key );
 582
 583                                 if( $this->hasSessionCookie() || $this->mSkipCookieCheck ) {
 584                                         /* Replace the language object to provide user interface in
 585                                          * correct language immediately on this first page load.
 586                                          */
 587                                         global $wgLang, $wgRequest;
 588                                         $code = $wgRequest->getVal( 'uselang', $wgUser->getOption( 'language' ) );
 589                                         $wgLang = Language::factory( $code );
 590                                         return $this->successfulLogin();
 591                                 } else {
 592                                         return $this->cookieRedirectCheck( 'login' );
 593                                 }
 594                                 break;
 595
 596                         case self::NO_NAME:
 597                         case self::ILLEGAL:
 598                                 $this->mainLoginForm( wfMsg( 'noname' ) );
 599                                 break;
 600                         case self::WRONG_PLUGIN_PASS:
 601                                 $this->mainLoginForm( wfMsg( 'wrongpassword' ) );
 602                                 break;
 603                         case self::NOT_EXISTS:
 604                                 if( $wgUser->isAllowed( 'createaccount' ) ){
 605                                         $this->mainLoginForm( wfMsgWikiHtml( 'nosuchuser', htmlspecialchars( $this->mName ) ) );
 606                                 } else {
 607                                         $this->mainLoginForm( wfMsg( 'nosuchusershort', htmlspecialchars( $this->mName ) ) );
 608                                 }
 609                                 break;
 610                         case self::WRONG_PASS:
 611                                 $this->mainLoginForm( wfMsg( 'wrongpassword' ) );
 612                                 break;
 613                         case self::EMPTY_PASS:
 614                                 $this->mainLoginForm( wfMsg( 'wrongpasswordempty' ) );
 615                                 break;
 616                         case self::RESET_PASS:
 617                                 $this->resetLoginForm( wfMsg( 'resetpass_announce' ) );
 618                                 break;
 619                         case self::CREATE_BLOCKED:
 620                                 $this->userBlockedMessage();
 621                                 break;
 622                         case self::THROTTLED:
 623                                 $this->mainLoginForm( wfMsg( 'login-throttled' ) );
 624                                 break;
 625                         default:
 626                                 throw new MWException( "Unhandled case value" );
 627                 }
 628         }
 629
 630         function resetLoginForm( $error ) {
 631                 global $wgOut;
 632                 $wgOut->addHTML( Xml::element('p', array( 'class' => 'error' ), $error ) );
 633                 $reset = new SpecialResetpass();
 634                 $reset->execute( null );
 635         }
 636
 637         /**
 638          * @private
 639          */
 640         function mailPassword() {
 641                 global $wgUser, $wgOut, $wgAuth;
 642
 643                 if ( wfReadOnly() ) {
 644                         $wgOut->readOnlyPage();
 645                         return false;
 646                 }
 647
 648                 if( !$wgAuth->allowPasswordChange() ) {
 649                         $this->mainLoginForm( wfMsg( 'resetpass_forbidden' ) );
 650                         return;
 651                 }
 652
 653                 # Check against blocked IPs
 654                 # fixme -- should we not?
 655                 if( $wgUser->isBlocked() ) {
 656                         $this->mainLoginForm( wfMsg( 'blocked-mailpassword' ) );
 657                         return;
 658                 }
 659
 660                 // Check for hooks
 661                 $error = null;
 662                 if ( ! wfRunHooks( 'UserLoginMailPassword', array( $this->mName, &$error ) ) ) {
 663                         $this->mainLoginForm( $error );
 664                         return;
 665                 }
 666
 667                 # Check against the rate limiter
 668                 if( $wgUser->pingLimiter( 'mailpassword' ) ) {
 669                         $wgOut->rateLimited();
 670                         return;
 671                 }
 672
 673                 if ( '' == $this->mName ) {
 674                         $this->mainLoginForm( wfMsg( 'noname' ) );
 675                         return;
 676                 }
 677                 $u = User::newFromName( $this->mName );
 678                 if( is_null( $u ) ) {
 679                         $this->mainLoginForm( wfMsg( 'noname' ) );
 680                         return;
 681                 }
 682                 if ( 0 == $u->getID() ) {
 683                         $this->mainLoginForm( wfMsgWikiHtml( 'nosuchuser', htmlspecialchars( $u->getName() ) ) );
 684                         return;
 685                 }
 686
 687                 # Check against password throttle
 688                 if ( $u->isPasswordReminderThrottled() ) {
 689                         global $wgPasswordReminderResendTime;
 690                         # Round the time in hours to 3 d.p., in case someone is specifying
 691                         # minutes or seconds.
 692                         $this->mainLoginForm( wfMsgExt( 'throttled-mailpassword', array( 'parsemag' ),
 693                                 round( $wgPasswordReminderResendTime, 3 ) ) );
 694                         return;
 695                 }
 696
 697                 $result = $this->mailPasswordInternal( $u, true, 'passwordremindertitle', 'passwordremindertext' );
 698                 if( WikiError::isError( $result ) ) {
 699                         $this->mainLoginForm( wfMsg( 'mailerror', $result->getMessage() ) );
 700                 } else {
 701                         $this->mainLoginForm( wfMsg( 'passwordsent', $u->getName() ), 'success' );
 702                 }
 703         }
 704
 705
 706         /**
 707          * @param object user
 708          * @param bool throttle
 709          * @param string message name of email title
 710          * @param string message name of email text
 711          * @return mixed true on success, WikiError on failure
 712          * @private
 713          */
 714         function mailPasswordInternal( $u, $throttle = true, $emailTitle = 'passwordremindertitle', $emailText = 'passwordremindertext' ) {
 715                 global $wgServer, $wgScript, $wgUser, $wgNewPasswordExpiry;
 716
 717                 if ( '' == $u->getEmail() ) {
 718                         return new WikiError( wfMsg( 'noemail', $u->getName() ) );
 719                 }
 720                 $ip = wfGetIP();
 721                 if( !$ip ) {
 722                         return new WikiError( wfMsg( 'badipaddress' ) );
 723                 }
 724
 725                 wfRunHooks( 'User::mailPasswordInternal', array(&$wgUser, &$ip, &$u) );
 726
 727                 $np = $u->randomPassword();
 728                 $u->setNewpassword( $np, $throttle );
 729                 $u->saveSettings();
 730
 731                 $m = wfMsgExt( $emailText, array( 'parsemag' ), $ip, $u->getName(), $np,
 732                                 $wgServer . $wgScript, round( $wgNewPasswordExpiry / 86400 ) );
 733                 $result = $u->sendMail( wfMsg( $emailTitle ), $m );
 734
 735                 return $result;
 736         }
 737
 738
 739         /**
 740          * Run any hooks registered for logins, then HTTP redirect to
 741          * $this->mReturnTo (or Main Page if that's undefined).  Formerly we had a
 742          * nice message here, but that's really not as useful as just being sent to
 743          * wherever you logged in from.  It should be clear that the action was
 744          * successful, given the lack of error messages plus the appearance of your
 745          * name in the upper right.
 746          *
 747          * @private
 748          */
 749         function successfulLogin() {
 750                 global $wgUser, $wgOut;
 751
 752                 # Run any hooks; display injected HTML if any, else redirect
 753                 $injected_html = '';
 754                 wfRunHooks('UserLoginComplete', array(&$wgUser, &$injected_html));
 755
 756                 if( $injected_html !== '' ) {
 757                         $this->displaySuccessfulLogin( 'loginsuccess', $injected_html );
 758                 } else {
 759                         $titleObj = Title::newFromText( $this->mReturnTo );
 760                         if ( !$titleObj instanceof Title ) {
 761                                 $titleObj = Title::newMainPage();
 762                         }
 763                         $wgOut->redirect( $titleObj->getFullURL( $this->mReturnToQuery ) );
 764                 }
 765         }
 766
 767         /**
 768          * Run any hooks registered for logins, then display a message welcoming
 769          * the user.
 770          *
 771          * @private
 772          */
 773         function successfulCreation() {
 774                 global $wgUser, $wgOut;
 775
 776                 # Run any hooks; display injected HTML
 777                 $injected_html = '';
 778                 wfRunHooks('UserLoginComplete', array(&$wgUser, &$injected_html));
 779
 780                 $this->displaySuccessfulLogin( 'welcomecreation', $injected_html );
 781         }
 782
 783         /**
 784          * Display a "login successful" page.
 785          */
 786         private function displaySuccessfulLogin( $msgname, $injected_html ) {
 787                 global $wgOut, $wgUser;
 788
 789                 $wgOut->setPageTitle( wfMsg( 'loginsuccesstitle' ) );
 790                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
 791                 $wgOut->setArticleRelated( false );
 792                 $wgOut->addWikiMsg( $msgname, $wgUser->getName() );
 793                 $wgOut->addHTML( $injected_html );
 794
 795                 if ( !empty( $this->mReturnTo ) ) {
 796                         $wgOut->returnToMain( null, $this->mReturnTo, $this->mReturnToQuery );
 797                 } else {
 798                         $wgOut->returnToMain( null );
 799                 }
 800         }
 801
 802         /** */
 803         function userNotPrivilegedMessage($errors) {
 804                 global $wgOut;
 805
 806                 $wgOut->setPageTitle( wfMsg( 'permissionserrors' ) );
 807                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
 808                 $wgOut->setArticleRelated( false );
 809
 810                 $wgOut->addWikitext( $wgOut->formatPermissionsErrorMessage( $errors, 'createaccount' ) );
 811                 // Stuff that might want to be added at the end. For example, instruc-
 812                 // tions if blocked.
 813                 $wgOut->addWikiMsg( 'cantcreateaccount-nonblock-text' );
 814
 815                 $wgOut->returnToMain( false );
 816         }
 817
 818         /** */
 819         function userBlockedMessage() {
 820                 global $wgOut, $wgUser;
 821
 822                 # Let's be nice about this, it's likely that this feature will be used
 823                 # for blocking large numbers of innocent people, e.g. range blocks on
 824                 # schools. Don't blame it on the user. There's a small chance that it
 825                 # really is the user's fault, i.e. the username is blocked and they
 826                 # haven't bothered to log out before trying to create an account to
 827                 # evade it, but we'll leave that to their guilty conscience to figure
 828                 # out.
 829
 830                 $wgOut->setPageTitle( wfMsg( 'cantcreateaccounttitle' ) );
 831                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
 832                 $wgOut->setArticleRelated( false );
 833
 834                 $ip = wfGetIP();
 835                 $blocker = User::whoIs( $wgUser->mBlock->mBy );
 836                 $block_reason = $wgUser->mBlock->mReason;
 837
 838                 if ( strval( $block_reason ) === '' ) {
 839                         $block_reason = wfMsg( 'blockednoreason' );
 840                 }
 841                 $wgOut->addWikiMsg( 'cantcreateaccount-text', $ip, $block_reason, $blocker );
 842                 $wgOut->returnToMain( false );
 843         }
 844
 845         /**
 846          * @private
 847          */
 848         function mainLoginForm( $msg, $msgtype = 'error' ) {
 849                 global $wgUser, $wgOut, $wgHiddenPrefs, $wgEnableEmail;
 850                 global $wgCookiePrefix, $wgLoginLanguageSelector;
 851                 global $wgAuth, $wgEmailConfirmToEdit, $wgCookieExpiration;
 852
 853                 $titleObj = SpecialPage::getTitleFor( 'Userlogin' );
 854
 855                 if ( $this->mType == 'signup' ) {
 856                         // Block signup here if in readonly. Keeps user from
 857                         // going through the process (filling out data, etc)
 858                         // and being informed later.
 859                         if ( wfReadOnly() ) {
 860                                 $wgOut->readOnlyPage();
 861                                 return;
 862                         } elseif ( $wgUser->isBlockedFromCreateAccount() ) {
 863                                 $this->userBlockedMessage();
 864                                 return;
 865                         } elseif ( count( $permErrors = $titleObj->getUserPermissionsErrors( 'createaccount', $wgUser, true ) )>0 ) {
 866                                 $wgOut->showPermissionsErrorPage( $permErrors, 'createaccount' );
 867                                 return;
 868                         }
 869                 }
 870
 871                 if ( '' == $this->mName ) {
 872                         if ( $wgUser->isLoggedIn() ) {
 873                                 $this->mName = $wgUser->getName();
 874                         } else {
 875                                 $this->mName = isset( $_COOKIE[$wgCookiePrefix.'UserName'] ) ? $_COOKIE[$wgCookiePrefix.'UserName'] : null;
 876                         }
 877                 }
 878
 879                 $titleObj = SpecialPage::getTitleFor( 'Userlogin' );
 880
 881                 if ( $this->mType == 'signup' ) {
 882                         $template = new UsercreateTemplate();
 883                         $q = 'action=submitlogin&type=signup';
 884                         $linkq = 'type=login';
 885                         $linkmsg = 'gotaccount';
 886                 } else {
 887                         $template = new UserloginTemplate();
 888                         $q = 'action=submitlogin&type=login';
 889                         $linkq = 'type=signup';
 890                         $linkmsg = 'nologin';
 891                 }
 892
 893                 if ( !empty( $this->mReturnTo ) ) {
 894                         $returnto = '&returnto=' . wfUrlencode( $this->mReturnTo );
 895                         if ( !empty( $this->mReturnToQuery ) )
 896                                 $returnto .= '&returntoquery=' .
 897                                         wfUrlencode( $this->mReturnToQuery );
 898                         $q .= $returnto;
 899                         $linkq .= $returnto;
 900                 }
 901
 902                 # Pass any language selection on to the mode switch link
 903                 if( $wgLoginLanguageSelector && $this->mLanguage )
 904                         $linkq .= '&uselang=' . $this->mLanguage;
 905
 906                 $link = '<a href="' . htmlspecialchars ( $titleObj->getLocalUrl( $linkq ) ) . '">';
 907                 $link .= wfMsgHtml( $linkmsg . 'link' ); # Calling either 'gotaccountlink' or 'nologinlink'
 908                 $link .= '</a>';
 909
 910                 # Don't show a "create account" link if the user can't
 911                 if( $this->showCreateOrLoginLink( $wgUser ) )
 912                         $template->set( 'link', wfMsgWikiHtml( $linkmsg, $link ) );
 913                 else
 914                         $template->set( 'link', '' );
 915
 916                 $template->set( 'header', '' );
 917                 $template->set( 'name', $this->mName );
 918                 $template->set( 'password', $this->mPassword );
 919                 $template->set( 'retype', $this->mRetype );
 920                 $template->set( 'email', $this->mEmail );
 921                 $template->set( 'realname', $this->mRealName );
 922                 $template->set( 'domain', $this->mDomain );
 923
 924                 $template->set( 'action', $titleObj->getLocalUrl( $q ) );
 925                 $template->set( 'message', $msg );
 926                 $template->set( 'messagetype', $msgtype );
 927                 $template->set( 'createemail', $wgEnableEmail && $wgUser->isLoggedIn() );
 928                 $template->set( 'userealname', !in_array( 'realname', $wgHiddenPrefs ) );
 929                 $template->set( 'useemail', $wgEnableEmail );
 930                 $template->set( 'emailrequired', $wgEmailConfirmToEdit );
 931                 $template->set( 'canreset', $wgAuth->allowPasswordChange() );
 932                 $template->set( 'canremember', ( $wgCookieExpiration > 0 ) );
 933                 $template->set( 'remember', $wgUser->getOption( 'rememberpassword' ) or $this->mRemember  );
 934
 935                 # Prepare language selection links as needed
 936                 if( $wgLoginLanguageSelector ) {
 937                         $template->set( 'languages', $this->makeLanguageSelector() );
 938                         if( $this->mLanguage )
 939                                 $template->set( 'uselang', $this->mLanguage );
 940                 }
 941
 942                 // Give authentication and captcha plugins a chance to modify the form
 943                 $wgAuth->modifyUITemplate( $template, $this->mType );
 944                 if ( $this->mType == 'signup' ) {
 945                         wfRunHooks( 'UserCreateForm', array( &$template ) );
 946                 } else {
 947                         wfRunHooks( 'UserLoginForm', array( &$template ) );
 948                 }
 949
 950                 $wgOut->setPageTitle( wfMsg( 'userlogin' ) );
 951                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
 952                 $wgOut->setArticleRelated( false );
 953                 $wgOut->disallowUserJs();  // just in case...
 954                 $wgOut->addTemplate( $template );
 955         }
 956
 957         /**
 958          * @private
 959          */
 960         function showCreateOrLoginLink( &$user ) {
 961                 if( $this->mType == 'signup' ) {
 962                         return( true );
 963                 } elseif( $user->isAllowed( 'createaccount' ) ) {
 964                         return( true );
 965                 } else {
 966                         return( false );
 967                 }
 968         }
 969
 970         /**
 971          * Check if a session cookie is present.
 972          *
 973          * This will not pick up a cookie set during _this_ request, but is meant
 974          * to ensure that the client is returning the cookie which was set on a
 975          * previous pass through the system.
 976          *
 977          * @private
 978          */
 979         function hasSessionCookie() {
 980                 global $wgDisableCookieCheck, $wgRequest;
 981                 return $wgDisableCookieCheck ? true : $wgRequest->checkSessionCookie();
 982         }
 983
 984         /**
 985          * @private
 986          */
 987         function cookieRedirectCheck( $type ) {
 988                 global $wgOut;
 989
 990                 $titleObj = SpecialPage::getTitleFor( 'Userlogin' );
 991                 $query = array( 'wpCookieCheck' => $type );
 992                 if ( $this->mReturnTo ) $query['returnto'] = $this->mReturnTo;
 993                 $check = $titleObj->getFullURL( $query );
 994
 995                 return $wgOut->redirect( $check );
 996         }
 997
 998         /**
 999          * @private
1000          */
1001         function onCookieRedirectCheck( $type ) {
1002                 if ( !$this->hasSessionCookie() ) {
1003                         if ( $type == 'new' ) {
1004                                 return $this->mainLoginForm( wfMsgExt( 'nocookiesnew', array( 'parseinline' ) ) );
1005                         } else if ( $type == 'login' ) {
1006                                 return $this->mainLoginForm( wfMsgExt( 'nocookieslogin', array( 'parseinline' ) ) );
1007                         } else {
1008                                 # shouldn't happen
1009                                 return $this->mainLoginForm( wfMsg( 'error' ) );
1010                         }
1011                 } else {
1012                         return $this->successfulLogin();
1013                 }
1014         }
1015
1016         /**
1017          * @private
1018          */
1019         function throttleHit( $limit ) {
1020                 $this->mainLoginForm( wfMsgExt( 'acct_creation_throttle_hit', array( 'parseinline' ), $limit ) );
1021         }
1022
1023         /**
1024          * Produce a bar of links which allow the user to select another language
1025          * during login/registration but retain "returnto"
1026          *
1027          * @return string
1028          */
1029         function makeLanguageSelector() {
1030                 global $wgLang;
1031
1032                 $msg = wfMsgForContent( 'loginlanguagelinks' );
1033                 if( $msg != '' && !wfEmptyMsg( 'loginlanguagelinks', $msg ) ) {
1034                         $langs = explode( "\n", $msg );
1035                         $links = array();
1036                         foreach( $langs as $lang ) {
1037                                 $lang = trim( $lang, '* ' );
1038                                 $parts = explode( '|', $lang );
1039                                 if (count($parts) >= 2) {
1040                                         $links[] = $this->makeLanguageSelectorLink( $parts[0], $parts[1] );
1041                                 }
1042                         }
1043                         return count( $links ) > 0 ? wfMsgHtml( 'loginlanguagelabel', $wgLang->pipeList( $links ) ) : '';
1044                 } else {
1045                         return '';
1046                 }
1047         }
1048
1049         /**
1050          * Create a language selector link for a particular language
1051          * Links back to this page preserving type and returnto
1052          *
1053          * @param $text Link text
1054          * @param $lang Language code
1055          */
1056         function makeLanguageSelectorLink( $text, $lang ) {
1057                 global $wgUser;
1058                 $self = SpecialPage::getTitleFor( 'Userlogin' );
1059                 $attr = array( 'uselang' => $lang );
1060                 if( $this->mType == 'signup' )
1061                         $attr['type'] = 'signup';
1062                 if( $this->mReturnTo )
1063                         $attr['returnto'] = $this->mReturnTo;
1064                 $skin = $wgUser->getSkin();
1065                 return $skin->linkKnown(
1066                         $self,
1067                         htmlspecialchars( $text ),
1068                         array(),
1069                         $attr
1070                 );
1071         }
1072 }