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