MediaWiki  1.34.0
UploadBase.php
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1 <?php
27 
42 abstract class UploadBase {
44  protected $mTempPath;
46  protected $tempFileObj;
48  protected $mDesiredDestName;
50  protected $mDestName;
52  protected $mRemoveTempFile;
54  protected $mSourceType;
56  protected $mTitle = false;
58  protected $mTitleError = 0;
60  protected $mFilteredName;
62  protected $mFinalExtension;
64  protected $mLocalFile;
66  protected $mStashFile;
68  protected $mFileSize;
70  protected $mFileProps;
72  protected $mBlackListedExtensions;
74  protected $mJavaDetected;
76  protected $mSVGNSError;
77 
78  protected static $safeXmlEncodings = [
79  'UTF-8',
80  'ISO-8859-1',
81  'ISO-8859-2',
82  'UTF-16',
83  'UTF-32',
84  'WINDOWS-1250',
85  'WINDOWS-1251',
86  'WINDOWS-1252',
87  'WINDOWS-1253',
88  'WINDOWS-1254',
89  'WINDOWS-1255',
90  'WINDOWS-1256',
91  'WINDOWS-1257',
92  'WINDOWS-1258',
93  ];
94 
95  const SUCCESS = 0;
96  const OK = 0;
97  const EMPTY_FILE = 3;
98  const MIN_LENGTH_PARTNAME = 4;
99  const ILLEGAL_FILENAME = 5;
100  const OVERWRITE_EXISTING_FILE = 7; # Not used anymore; handled by verifyTitlePermissions()
101  const FILETYPE_MISSING = 8;
102  const FILETYPE_BADTYPE = 9;
103  const VERIFICATION_ERROR = 10;
104  const HOOK_ABORTED = 11;
105  const FILE_TOO_LARGE = 12;
106  const WINDOWS_NONASCII_FILENAME = 13;
107  const FILENAME_TOO_LONG = 14;
108 
113  public function getVerificationErrorCode( $error ) {
114  $code_to_status = [
115  self::EMPTY_FILE => 'empty-file',
116  self::FILE_TOO_LARGE => 'file-too-large',
117  self::FILETYPE_MISSING => 'filetype-missing',
118  self::FILETYPE_BADTYPE => 'filetype-banned',
119  self::MIN_LENGTH_PARTNAME => 'filename-tooshort',
120  self::ILLEGAL_FILENAME => 'illegal-filename',
121  self::OVERWRITE_EXISTING_FILE => 'overwrite',
122  self::VERIFICATION_ERROR => 'verification-error',
123  self::HOOK_ABORTED => 'hookaborted',
124  self::WINDOWS_NONASCII_FILENAME => 'windows-nonascii-filename',
125  self::FILENAME_TOO_LONG => 'filename-toolong',
126  ];
127  return $code_to_status[$error] ?? 'unknown-error';
128  }
129 
135  public static function isEnabled() {
136  global $wgEnableUploads;
137 
138  if ( !$wgEnableUploads ) {
139  return false;
140  }
141 
142  # Check php's file_uploads setting
143  return wfIsHHVM() || wfIniGetBool( 'file_uploads' );
144  }
145 
154  public static function isAllowed( UserIdentity $user ) {
155  $permissionManager = MediaWikiServices::getInstance()->getPermissionManager();
156  foreach ( [ 'upload', 'edit' ] as $permission ) {
157  if ( !$permissionManager->userHasRight( $user, $permission ) ) {
158  return $permission;
159  }
160  }
161 
162  return true;
163  }
164 
171  public static function isThrottled( $user ) {
172  return $user->pingLimiter( 'upload' );
173  }
174 
175  // Upload handlers. Should probably just be a global.
176  private static $uploadHandlers = [ 'Stash', 'File', 'Url' ];
177 
185  public static function createFromRequest( &$request, $type = null ) {
186  $type = $type ?: $request->getVal( 'wpSourceType', 'File' );
187 
188  if ( !$type ) {
189  return null;
190  }
191 
192  // Get the upload class
193  $type = ucfirst( $type );
194 
195  // Give hooks the chance to handle this request
196  $className = null;
197  Hooks::run( 'UploadCreateFromRequest', [ $type, &$className ] );
198  if ( is_null( $className ) ) {
199  $className = 'UploadFrom' . $type;
200  wfDebug( __METHOD__ . ": class name: $className\n" );
201  if ( !in_array( $type, self::$uploadHandlers ) ) {
202  return null;
203  }
204  }
205 
206  // Check whether this upload class is enabled
207  if ( !call_user_func( [ $className, 'isEnabled' ] ) ) {
208  return null;
209  }
210 
211  // Check whether the request is valid
212  if ( !call_user_func( [ $className, 'isValidRequest' ], $request ) ) {
213  return null;
214  }
215 
217  $handler = new $className;
218 
219  $handler->initializeFromRequest( $request );
220 
221  return $handler;
222  }
223 
229  public static function isValidRequest( $request ) {
230  return false;
231  }
232 
233  public function __construct() {
234  }
235 
242  public function getSourceType() {
243  return null;
244  }
245 
254  public function initializePathInfo( $name, $tempPath, $fileSize, $removeTempFile = false ) {
255  $this->mDesiredDestName = $name;
256  if ( FileBackend::isStoragePath( $tempPath ) ) {
257  throw new MWException( __METHOD__ . " given storage path `$tempPath`." );
258  }
259 
260  $this->setTempFile( $tempPath, $fileSize );
261  $this->mRemoveTempFile = $removeTempFile;
262  }
263 
269  abstract public function initializeFromRequest( &$request );
270 
275  protected function setTempFile( $tempPath, $fileSize = null ) {
276  $this->mTempPath = $tempPath;
277  $this->mFileSize = $fileSize ?: null;
278  if ( strlen( $this->mTempPath ) && file_exists( $this->mTempPath ) ) {
279  $this->tempFileObj = new TempFSFile( $this->mTempPath );
280  if ( !$fileSize ) {
281  $this->mFileSize = filesize( $this->mTempPath );
282  }
283  } else {
284  $this->tempFileObj = null;
285  }
286  }
287 
292  public function fetchFile() {
293  return Status::newGood();
294  }
295 
300  public function isEmptyFile() {
301  return empty( $this->mFileSize );
302  }
303 
308  public function getFileSize() {
309  return $this->mFileSize;
310  }
311 
316  public function getTempFileSha1Base36() {
317  return FSFile::getSha1Base36FromPath( $this->mTempPath );
318  }
319 
324  public function getRealPath( $srcPath ) {
325  $repo = RepoGroup::singleton()->getLocalRepo();
326  if ( FileRepo::isVirtualUrl( $srcPath ) ) {
330  $tmpFile = $repo->getLocalCopy( $srcPath );
331  if ( $tmpFile ) {
332  $tmpFile->bind( $this ); // keep alive with $this
333  }
334  $path = $tmpFile ? $tmpFile->getPath() : false;
335  } else {
336  $path = $srcPath;
337  }
338 
339  return $path;
340  }
341 
346  public function verifyUpload() {
350  if ( $this->isEmptyFile() ) {
351  return [ 'status' => self::EMPTY_FILE ];
352  }
353 
357  $maxSize = self::getMaxUploadSize( $this->getSourceType() );
358  if ( $this->mFileSize > $maxSize ) {
359  return [
360  'status' => self::FILE_TOO_LARGE,
361  'max' => $maxSize,
362  ];
363  }
364 
370  $verification = $this->verifyFile();
371  if ( $verification !== true ) {
372  return [
373  'status' => self::VERIFICATION_ERROR,
374  'details' => $verification
375  ];
376  }
377 
381  $result = $this->validateName();
382  if ( $result !== true ) {
383  return $result;
384  }
385 
386  return [ 'status' => self::OK ];
387  }
388 
395  public function validateName() {
396  $nt = $this->getTitle();
397  if ( is_null( $nt ) ) {
398  $result = [ 'status' => $this->mTitleError ];
399  if ( $this->mTitleError == self::ILLEGAL_FILENAME ) {
400  $result['filtered'] = $this->mFilteredName;
401  }
402  if ( $this->mTitleError == self::FILETYPE_BADTYPE ) {
403  $result['finalExt'] = $this->mFinalExtension;
404  if ( count( $this->mBlackListedExtensions ) ) {
405  $result['blacklistedExt'] = $this->mBlackListedExtensions;
406  }
407  }
408 
409  return $result;
410  }
411  $this->mDestName = $this->getLocalFile()->getName();
412 
413  return true;
414  }
415 
425  protected function verifyMimeType( $mime ) {
427  if ( $wgVerifyMimeType ) {
428  wfDebug( "mime: <$mime> extension: <{$this->mFinalExtension}>\n" );
429  global $wgMimeTypeBlacklist;
430  if ( $this->checkFileExtension( $mime, $wgMimeTypeBlacklist ) ) {
431  return [ 'filetype-badmime', $mime ];
432  }
433 
434  if ( $wgVerifyMimeTypeIE ) {
435  # Check what Internet Explorer would detect
436  $fp = fopen( $this->mTempPath, 'rb' );
437  $chunk = fread( $fp, 256 );
438  fclose( $fp );
439 
440  $magic = MediaWiki\MediaWikiServices::getInstance()->getMimeAnalyzer();
441  $extMime = $magic->guessTypesForExtension( $this->mFinalExtension );
442  $ieTypes = $magic->getIEMimeTypes( $this->mTempPath, $chunk, $extMime );
443  foreach ( $ieTypes as $ieType ) {
444  if ( $this->checkFileExtension( $ieType, $wgMimeTypeBlacklist ) ) {
445  return [ 'filetype-bad-ie-mime', $ieType ];
446  }
447  }
448  }
449  }
450 
451  return true;
452  }
453 
459  protected function verifyFile() {
461 
462  $status = $this->verifyPartialFile();
463  if ( $status !== true ) {
464  return $status;
465  }
466 
467  $mwProps = new MWFileProps( MediaWiki\MediaWikiServices::getInstance()->getMimeAnalyzer() );
468  $this->mFileProps = $mwProps->getPropsFromPath( $this->mTempPath, $this->mFinalExtension );
469  $mime = $this->mFileProps['mime'];
470 
471  if ( $wgVerifyMimeType ) {
472  # XXX: Missing extension will be caught by validateName() via getTitle()
473  if ( $this->mFinalExtension != '' && !$this->verifyExtension( $mime, $this->mFinalExtension ) ) {
474  return [ 'filetype-mime-mismatch', $this->mFinalExtension, $mime ];
475  }
476  }
477 
478  # check for htmlish code and javascript
480  if ( $this->mFinalExtension == 'svg' || $mime == 'image/svg+xml' ) {
481  $svgStatus = $this->detectScriptInSvg( $this->mTempPath, false );
482  if ( $svgStatus !== false ) {
483  return $svgStatus;
484  }
485  }
486  }
487 
488  $handler = MediaHandler::getHandler( $mime );
489  if ( $handler ) {
490  $handlerStatus = $handler->verifyUpload( $this->mTempPath );
491  if ( !$handlerStatus->isOK() ) {
492  $errors = $handlerStatus->getErrorsArray();
493 
494  return reset( $errors );
495  }
496  }
497 
498  $error = true;
499  Hooks::run( 'UploadVerifyFile', [ $this, $mime, &$error ] );
500  if ( $error !== true ) {
501  if ( !is_array( $error ) ) {
502  $error = [ $error ];
503  }
504  return $error;
505  }
506 
507  wfDebug( __METHOD__ . ": all clear; passing.\n" );
508 
509  return true;
510  }
511 
520  protected function verifyPartialFile() {
522 
523  # getTitle() sets some internal parameters like $this->mFinalExtension
524  $this->getTitle();
525 
526  $mwProps = new MWFileProps( MediaWiki\MediaWikiServices::getInstance()->getMimeAnalyzer() );
527  $this->mFileProps = $mwProps->getPropsFromPath( $this->mTempPath, $this->mFinalExtension );
528 
529  # check MIME type, if desired
530  $mime = $this->mFileProps['file-mime'];
531  $status = $this->verifyMimeType( $mime );
532  if ( $status !== true ) {
533  return $status;
534  }
535 
536  # check for htmlish code and javascript
538  if ( self::detectScript( $this->mTempPath, $mime, $this->mFinalExtension ) ) {
539  return [ 'uploadscripted' ];
540  }
541  if ( $this->mFinalExtension == 'svg' || $mime == 'image/svg+xml' ) {
542  $svgStatus = $this->detectScriptInSvg( $this->mTempPath, true );
543  if ( $svgStatus !== false ) {
544  return $svgStatus;
545  }
546  }
547  }
548 
549  # Check for Java applets, which if uploaded can bypass cross-site
550  # restrictions.
551  if ( !$wgAllowJavaUploads ) {
552  $this->mJavaDetected = false;
553  $zipStatus = ZipDirectoryReader::read( $this->mTempPath,
554  [ $this, 'zipEntryCallback' ] );
555  if ( !$zipStatus->isOK() ) {
556  $errors = $zipStatus->getErrorsArray();
557  $error = reset( $errors );
558  if ( $error[0] !== 'zip-wrong-format' ) {
559  return $error;
560  }
561  }
562  if ( $this->mJavaDetected ) {
563  return [ 'uploadjava' ];
564  }
565  }
566 
567  # Scan the uploaded file for viruses
568  $virus = $this->detectVirus( $this->mTempPath );
569  if ( $virus ) {
570  return [ 'uploadvirus', $virus ];
571  }
572 
573  return true;
574  }
575 
581  public function zipEntryCallback( $entry ) {
582  $names = [ $entry['name'] ];
583 
584  // If there is a null character, cut off the name at it, because JDK's
585  // ZIP_GetEntry() uses strcmp() if the name hashes match. If a file name
586  // were constructed which had ".class\0" followed by a string chosen to
587  // make the hash collide with the truncated name, that file could be
588  // returned in response to a request for the .class file.
589  $nullPos = strpos( $entry['name'], "\000" );
590  if ( $nullPos !== false ) {
591  $names[] = substr( $entry['name'], 0, $nullPos );
592  }
593 
594  // If there is a trailing slash in the file name, we have to strip it,
595  // because that's what ZIP_GetEntry() does.
596  if ( preg_grep( '!\.class/?$!', $names ) ) {
597  $this->mJavaDetected = true;
598  }
599  }
600 
610  public function verifyPermissions( $user ) {
611  return $this->verifyTitlePermissions( $user );
612  }
613 
625  public function verifyTitlePermissions( $user ) {
630  $nt = $this->getTitle();
631  if ( is_null( $nt ) ) {
632  return true;
633  }
634  $permErrors = $nt->getUserPermissionsErrors( 'edit', $user );
635  $permErrorsUpload = $nt->getUserPermissionsErrors( 'upload', $user );
636  if ( !$nt->exists() ) {
637  $permErrorsCreate = $nt->getUserPermissionsErrors( 'create', $user );
638  } else {
639  $permErrorsCreate = [];
640  }
641  if ( $permErrors || $permErrorsUpload || $permErrorsCreate ) {
642  $permErrors = array_merge( $permErrors, wfArrayDiff2( $permErrorsUpload, $permErrors ) );
643  $permErrors = array_merge( $permErrors, wfArrayDiff2( $permErrorsCreate, $permErrors ) );
644 
645  return $permErrors;
646  }
647 
648  $overwriteError = $this->checkOverwrite( $user );
649  if ( $overwriteError !== true ) {
650  return [ $overwriteError ];
651  }
652 
653  return true;
654  }
655 
663  public function checkWarnings() {
664  $warnings = [];
665 
666  $localFile = $this->getLocalFile();
667  $localFile->load( File::READ_LATEST );
668  $filename = $localFile->getName();
669  $hash = $this->getTempFileSha1Base36();
670 
671  $badFileName = $this->checkBadFileName( $filename, $this->mDesiredDestName );
672  if ( $badFileName !== null ) {
673  $warnings['badfilename'] = $badFileName;
674  }
675 
676  $unwantedFileExtensionDetails = $this->checkUnwantedFileExtensions( $this->mFinalExtension );
677  if ( $unwantedFileExtensionDetails !== null ) {
678  $warnings['filetype-unwanted-type'] = $unwantedFileExtensionDetails;
679  }
680 
681  $fileSizeWarnings = $this->checkFileSize( $this->mFileSize );
682  if ( $fileSizeWarnings ) {
683  $warnings = array_merge( $warnings, $fileSizeWarnings );
684  }
685 
686  $localFileExistsWarnings = $this->checkLocalFileExists( $localFile, $hash );
687  if ( $localFileExistsWarnings ) {
688  $warnings = array_merge( $warnings, $localFileExistsWarnings );
689  }
690 
691  if ( $this->checkLocalFileWasDeleted( $localFile ) ) {
692  $warnings['was-deleted'] = $filename;
693  }
694 
695  // If a file with the same name exists locally then the local file has already been tested
696  // for duplication of content
697  $ignoreLocalDupes = isset( $warnings[ 'exists '] );
698  $dupes = $this->checkAgainstExistingDupes( $hash, $ignoreLocalDupes );
699  if ( $dupes ) {
700  $warnings['duplicate'] = $dupes;
701  }
702 
703  $archivedDupes = $this->checkAgainstArchiveDupes( $hash );
704  if ( $archivedDupes !== null ) {
705  $warnings['duplicate-archive'] = $archivedDupes;
706  }
707 
708  return $warnings;
709  }
710 
722  public static function makeWarningsSerializable( $warnings ) {
723  array_walk_recursive( $warnings, function ( &$param, $key ) {
724  if ( $param instanceof File ) {
725  $param = [
726  'fileName' => $param->getName(),
727  'timestamp' => $param->getTimestamp()
728  ];
729  } elseif ( is_object( $param ) ) {
730  throw new InvalidArgumentException(
731  'UploadBase::makeWarningsSerializable: ' .
732  'Unexpected object of class ' . get_class( $param ) );
733  }
734  } );
735  return $warnings;
736  }
737 
747  private function checkBadFileName( $filename, $desiredFileName ) {
748  $comparableName = str_replace( ' ', '_', $desiredFileName );
749  $comparableName = Title::capitalize( $comparableName, NS_FILE );
750 
751  if ( $desiredFileName != $filename && $comparableName != $filename ) {
752  return $filename;
753  }
754 
755  return null;
756  }
757 
766  private function checkUnwantedFileExtensions( $fileExtension ) {
768 
769  if ( $wgCheckFileExtensions ) {
770  $extensions = array_unique( $wgFileExtensions );
771  if ( !$this->checkFileExtension( $fileExtension, $extensions ) ) {
772  return [
773  $fileExtension,
774  $wgLang->commaList( $extensions ),
775  count( $extensions )
776  ];
777  }
778  }
779 
780  return null;
781  }
782 
788  private function checkFileSize( $fileSize ) {
789  global $wgUploadSizeWarning;
790 
791  $warnings = [];
792 
793  if ( $wgUploadSizeWarning && ( $fileSize > $wgUploadSizeWarning ) ) {
794  $warnings['large-file'] = [ $wgUploadSizeWarning, $fileSize ];
795  }
796 
797  if ( $fileSize == 0 ) {
798  $warnings['empty-file'] = true;
799  }
800 
801  return $warnings;
802  }
803 
810  private function checkLocalFileExists( LocalFile $localFile, $hash ) {
811  $warnings = [];
812 
813  $exists = self::getExistsWarning( $localFile );
814  if ( $exists !== false ) {
815  $warnings['exists'] = $exists;
816 
817  // check if file is an exact duplicate of current file version
818  if ( $hash === $localFile->getSha1() ) {
819  $warnings['no-change'] = $localFile;
820  }
821 
822  // check if file is an exact duplicate of older versions of this file
823  $history = $localFile->getHistory();
824  foreach ( $history as $oldFile ) {
825  if ( $hash === $oldFile->getSha1() ) {
826  $warnings['duplicate-version'][] = $oldFile;
827  }
828  }
829  }
830 
831  return $warnings;
832  }
833 
834  private function checkLocalFileWasDeleted( LocalFile $localFile ) {
835  return $localFile->wasDeleted() && !$localFile->exists();
836  }
837 
844  private function checkAgainstExistingDupes( $hash, $ignoreLocalDupes ) {
845  $dupes = RepoGroup::singleton()->findBySha1( $hash );
846  $title = $this->getTitle();
847  foreach ( $dupes as $key => $dupe ) {
848  if (
849  ( $dupe instanceof LocalFile ) &&
850  $ignoreLocalDupes &&
851  $title->equals( $dupe->getTitle() )
852  ) {
853  unset( $dupes[$key] );
854  }
855  }
856 
857  return $dupes;
858  }
859 
866  private function checkAgainstArchiveDupes( $hash ) {
867  $archivedFile = new ArchivedFile( null, 0, '', $hash );
868  if ( $archivedFile->getID() > 0 ) {
869  if ( $archivedFile->userCan( File::DELETED_FILE ) ) {
870  return $archivedFile->getName();
871  } else {
872  return '';
873  }
874  }
875 
876  return null;
877  }
878 
892  public function performUpload( $comment, $pageText, $watch, $user, $tags = [] ) {
893  $this->getLocalFile()->load( File::READ_LATEST );
894  $props = $this->mFileProps;
895 
896  $error = null;
897  Hooks::run( 'UploadVerifyUpload', [ $this, $user, $props, $comment, $pageText, &$error ] );
898  if ( $error ) {
899  if ( !is_array( $error ) ) {
900  $error = [ $error ];
901  }
902  return Status::newFatal( ...$error );
903  }
904 
905  $status = $this->getLocalFile()->upload(
906  $this->mTempPath,
907  $comment,
908  $pageText,
910  $props,
911  false,
912  $user,
913  $tags
914  );
915 
916  if ( $status->isGood() ) {
917  if ( $watch ) {
919  $this->getLocalFile()->getTitle(),
920  $user,
922  );
923  }
924  // Avoid PHP 7.1 warning of passing $this by reference
925  $uploadBase = $this;
926  Hooks::run( 'UploadComplete', [ &$uploadBase ] );
927 
928  $this->postProcessUpload();
929  }
930 
931  return $status;
932  }
933 
939  public function postProcessUpload() {
940  }
941 
948  public function getTitle() {
949  if ( $this->mTitle !== false ) {
950  return $this->mTitle;
951  }
952  if ( !is_string( $this->mDesiredDestName ) ) {
953  $this->mTitleError = self::ILLEGAL_FILENAME;
954  $this->mTitle = null;
955 
956  return $this->mTitle;
957  }
958  /* Assume that if a user specified File:Something.jpg, this is an error
959  * and that the namespace prefix needs to be stripped of.
960  */
961  $title = Title::newFromText( $this->mDesiredDestName );
962  if ( $title && $title->getNamespace() == NS_FILE ) {
963  $this->mFilteredName = $title->getDBkey();
964  } else {
965  $this->mFilteredName = $this->mDesiredDestName;
966  }
967 
968  # oi_archive_name is max 255 bytes, which include a timestamp and an
969  # exclamation mark, so restrict file name to 240 bytes.
970  if ( strlen( $this->mFilteredName ) > 240 ) {
971  $this->mTitleError = self::FILENAME_TOO_LONG;
972  $this->mTitle = null;
973 
974  return $this->mTitle;
975  }
976 
982  $this->mFilteredName = wfStripIllegalFilenameChars( $this->mFilteredName );
983  /* Normalize to title form before we do any further processing */
984  $nt = Title::makeTitleSafe( NS_FILE, $this->mFilteredName );
985  if ( is_null( $nt ) ) {
986  $this->mTitleError = self::ILLEGAL_FILENAME;
987  $this->mTitle = null;
988 
989  return $this->mTitle;
990  }
991  $this->mFilteredName = $nt->getDBkey();
992 
997  list( $partname, $ext ) = $this->splitExtensions( $this->mFilteredName );
998 
999  if ( $ext !== [] ) {
1000  $this->mFinalExtension = trim( end( $ext ) );
1001  } else {
1002  $this->mFinalExtension = '';
1003 
1004  # No extension, try guessing one
1005  $magic = MediaWiki\MediaWikiServices::getInstance()->getMimeAnalyzer();
1006  $mime = $magic->guessMimeType( $this->mTempPath );
1007  if ( $mime !== 'unknown/unknown' ) {
1008  # Get a space separated list of extensions
1009  $extList = $magic->getExtensionsForType( $mime );
1010  if ( $extList ) {
1011  # Set the extension to the canonical extension
1012  $this->mFinalExtension = strtok( $extList, ' ' );
1013 
1014  # Fix up the other variables
1015  $this->mFilteredName .= ".{$this->mFinalExtension}";
1016  $nt = Title::makeTitleSafe( NS_FILE, $this->mFilteredName );
1017  $ext = [ $this->mFinalExtension ];
1018  }
1019  }
1020  }
1021 
1022  /* Don't allow users to override the blacklist (check file extension) */
1025 
1026  $blackListedExtensions = $this->checkFileExtensionList( $ext, $wgFileBlacklist );
1027 
1028  if ( $this->mFinalExtension == '' ) {
1029  $this->mTitleError = self::FILETYPE_MISSING;
1030  $this->mTitle = null;
1031 
1032  return $this->mTitle;
1033  } elseif ( $blackListedExtensions ||
1035  !$this->checkFileExtension( $this->mFinalExtension, $wgFileExtensions ) )
1036  ) {
1037  $this->mBlackListedExtensions = $blackListedExtensions;
1038  $this->mTitleError = self::FILETYPE_BADTYPE;
1039  $this->mTitle = null;
1040 
1041  return $this->mTitle;
1042  }
1043 
1044  // Windows may be broken with special characters, see T3780
1045  if ( !preg_match( '/^[\x0-\x7f]*$/', $nt->getText() )
1046  && !RepoGroup::singleton()->getLocalRepo()->backendSupportsUnicodePaths()
1047  ) {
1048  $this->mTitleError = self::WINDOWS_NONASCII_FILENAME;
1049  $this->mTitle = null;
1050 
1051  return $this->mTitle;
1052  }
1053 
1054  # If there was more than one "extension", reassemble the base
1055  # filename to prevent bogus complaints about length
1056  if ( count( $ext ) > 1 ) {
1057  $iterations = count( $ext ) - 1;
1058  for ( $i = 0; $i < $iterations; $i++ ) {
1059  $partname .= '.' . $ext[$i];
1060  }
1061  }
1062 
1063  if ( strlen( $partname ) < 1 ) {
1064  $this->mTitleError = self::MIN_LENGTH_PARTNAME;
1065  $this->mTitle = null;
1066 
1067  return $this->mTitle;
1068  }
1069 
1070  $this->mTitle = $nt;
1071 
1072  return $this->mTitle;
1073  }
1074 
1080  public function getLocalFile() {
1081  if ( is_null( $this->mLocalFile ) ) {
1082  $nt = $this->getTitle();
1083  $this->mLocalFile = is_null( $nt ) ? null : wfLocalFile( $nt );
1084  }
1085 
1086  return $this->mLocalFile;
1087  }
1088 
1092  public function getStashFile() {
1093  return $this->mStashFile;
1094  }
1095 
1107  public function tryStashFile( User $user, $isPartial = false ) {
1108  if ( !$isPartial ) {
1109  $error = $this->runUploadStashFileHook( $user );
1110  if ( $error ) {
1111  return Status::newFatal( ...$error );
1112  }
1113  }
1114  try {
1115  $file = $this->doStashFile( $user );
1116  return Status::newGood( $file );
1117  } catch ( UploadStashException $e ) {
1118  return Status::newFatal( 'uploadstash-exception', get_class( $e ), $e->getMessage() );
1119  }
1120  }
1121 
1126  protected function runUploadStashFileHook( User $user ) {
1127  $props = $this->mFileProps;
1128  $error = null;
1129  Hooks::run( 'UploadStashFile', [ $this, $user, $props, &$error ] );
1130  if ( $error && !is_array( $error ) ) {
1131  $error = [ $error ];
1132  }
1133  return $error;
1134  }
1135 
1155  public function stashFile( User $user = null ) {
1156  wfDeprecated( __METHOD__, '1.28' );
1157 
1158  return $this->doStashFile( $user );
1159  }
1160 
1167  protected function doStashFile( User $user = null ) {
1168  $stash = RepoGroup::singleton()->getLocalRepo()->getUploadStash( $user );
1169  $file = $stash->stashFile( $this->mTempPath, $this->getSourceType() );
1170  $this->mStashFile = $file;
1171 
1172  return $file;
1173  }
1174 
1179  public function cleanupTempFile() {
1180  if ( $this->mRemoveTempFile && $this->tempFileObj ) {
1181  // Delete when all relevant TempFSFile handles go out of scope
1182  wfDebug( __METHOD__ . ": Marked temporary file '{$this->mTempPath}' for removal\n" );
1183  $this->tempFileObj->autocollect();
1184  }
1185  }
1186 
1187  public function getTempPath() {
1188  return $this->mTempPath;
1189  }
1190 
1200  public static function splitExtensions( $filename ) {
1201  $bits = explode( '.', $filename );
1202  $basename = array_shift( $bits );
1203 
1204  return [ $basename, $bits ];
1205  }
1206 
1215  public static function checkFileExtension( $ext, $list ) {
1216  return in_array( strtolower( $ext ), $list );
1217  }
1218 
1227  public static function checkFileExtensionList( $ext, $list ) {
1228  return array_intersect( array_map( 'strtolower', $ext ), $list );
1229  }
1230 
1238  public static function verifyExtension( $mime, $extension ) {
1239  $magic = MediaWiki\MediaWikiServices::getInstance()->getMimeAnalyzer();
1240 
1241  if ( !$mime || $mime == 'unknown' || $mime == 'unknown/unknown' ) {
1242  if ( !$magic->isRecognizableExtension( $extension ) ) {
1243  wfDebug( __METHOD__ . ": passing file with unknown detected mime type; " .
1244  "unrecognized extension '$extension', can't verify\n" );
1245 
1246  return true;
1247  } else {
1248  wfDebug( __METHOD__ . ": rejecting file with unknown detected mime type; " .
1249  "recognized extension '$extension', so probably invalid file\n" );
1250 
1251  return false;
1252  }
1253  }
1254 
1255  $match = $magic->isMatchingExtension( $extension, $mime );
1256 
1257  if ( $match === null ) {
1258  if ( $magic->getTypesForExtension( $extension ) !== null ) {
1259  wfDebug( __METHOD__ . ": No extension known for $mime, but we know a mime for $extension\n" );
1260 
1261  return false;
1262  } else {
1263  wfDebug( __METHOD__ . ": no file extension known for mime type $mime, passing file\n" );
1264 
1265  return true;
1266  }
1267  } elseif ( $match === true ) {
1268  wfDebug( __METHOD__ . ": mime type $mime matches extension $extension, passing file\n" );
1269 
1271  return true;
1272  } else {
1273  wfDebug( __METHOD__
1274  . ": mime type $mime mismatches file extension $extension, rejecting file\n" );
1275 
1276  return false;
1277  }
1278  }
1279 
1291  public static function detectScript( $file, $mime, $extension ) {
1292  # ugly hack: for text files, always look at the entire file.
1293  # For binary field, just check the first K.
1294 
1295  $isText = strpos( $mime, 'text/' ) === 0;
1296  if ( $isText ) {
1297  $chunk = file_get_contents( $file );
1298  } else {
1299  $fp = fopen( $file, 'rb' );
1300  $chunk = fread( $fp, 1024 );
1301  fclose( $fp );
1302  }
1303 
1304  $chunk = strtolower( $chunk );
1305 
1306  if ( !$chunk ) {
1307  return false;
1308  }
1309 
1310  # decode from UTF-16 if needed (could be used for obfuscation).
1311  if ( substr( $chunk, 0, 2 ) == "\xfe\xff" ) {
1312  $enc = 'UTF-16BE';
1313  } elseif ( substr( $chunk, 0, 2 ) == "\xff\xfe" ) {
1314  $enc = 'UTF-16LE';
1315  } else {
1316  $enc = null;
1317  }
1318 
1319  if ( $enc !== null ) {
1320  $chunk = iconv( $enc, "ASCII//IGNORE", $chunk );
1321  }
1322 
1323  $chunk = trim( $chunk );
1324 
1326  wfDebug( __METHOD__ . ": checking for embedded scripts and HTML stuff\n" );
1327 
1328  # check for HTML doctype
1329  if ( preg_match( "/<!DOCTYPE *X?HTML/i", $chunk ) ) {
1330  return true;
1331  }
1332 
1333  // Some browsers will interpret obscure xml encodings as UTF-8, while
1334  // PHP/expat will interpret the given encoding in the xml declaration (T49304)
1335  if ( $extension == 'svg' || strpos( $mime, 'image/svg' ) === 0 ) {
1336  if ( self::checkXMLEncodingMissmatch( $file ) ) {
1337  return true;
1338  }
1339  }
1340 
1341  // Quick check for HTML heuristics in old IE and Safari.
1342  //
1343  // The exact heuristics IE uses are checked separately via verifyMimeType(), so we
1344  // don't need them all here as it can cause many false positives.
1345  //
1346  // Check for `<script` and such still to forbid script tags and embedded HTML in SVG:
1347  $tags = [
1348  '<body',
1349  '<head',
1350  '<html', # also in safari
1351  '<script', # also in safari
1352  ];
1353 
1354  foreach ( $tags as $tag ) {
1355  if ( strpos( $chunk, $tag ) !== false ) {
1356  wfDebug( __METHOD__ . ": found something that may make it be mistaken for html: $tag\n" );
1357 
1358  return true;
1359  }
1360  }
1361 
1362  /*
1363  * look for JavaScript
1364  */
1365 
1366  # resolve entity-refs to look at attributes. may be harsh on big files... cache result?
1367  $chunk = Sanitizer::decodeCharReferences( $chunk );
1368 
1369  # look for script-types
1370  if ( preg_match( '!type\s*=\s*[\'"]?\s*(?:\w*/)?(?:ecma|java)!sim', $chunk ) ) {
1371  wfDebug( __METHOD__ . ": found script types\n" );
1372 
1373  return true;
1374  }
1375 
1376  # look for html-style script-urls
1377  if ( preg_match( '!(?:href|src|data)\s*=\s*[\'"]?\s*(?:ecma|java)script:!sim', $chunk ) ) {
1378  wfDebug( __METHOD__ . ": found html-style script urls\n" );
1379 
1380  return true;
1381  }
1382 
1383  # look for css-style script-urls
1384  if ( preg_match( '!url\s*\(\s*[\'"]?\s*(?:ecma|java)script:!sim', $chunk ) ) {
1385  wfDebug( __METHOD__ . ": found css-style script urls\n" );
1386 
1387  return true;
1388  }
1389 
1390  wfDebug( __METHOD__ . ": no scripts found\n" );
1391 
1392  return false;
1393  }
1394 
1402  public static function checkXMLEncodingMissmatch( $file ) {
1403  global $wgSVGMetadataCutoff;
1404  $contents = file_get_contents( $file, false, null, 0, $wgSVGMetadataCutoff );
1405  $encodingRegex = '!encoding[ \t\n\r]*=[ \t\n\r]*[\'"](.*?)[\'"]!si';
1406 
1407  if ( preg_match( "!<\?xml\b(.*?)\?>!si", $contents, $matches ) ) {
1408  if ( preg_match( $encodingRegex, $matches[1], $encMatch )
1409  && !in_array( strtoupper( $encMatch[1] ), self::$safeXmlEncodings )
1410  ) {
1411  wfDebug( __METHOD__ . ": Found unsafe XML encoding '{$encMatch[1]}'\n" );
1412 
1413  return true;
1414  }
1415  } elseif ( preg_match( "!<\?xml\b!si", $contents ) ) {
1416  // Start of XML declaration without an end in the first $wgSVGMetadataCutoff
1417  // bytes. There shouldn't be a legitimate reason for this to happen.
1418  wfDebug( __METHOD__ . ": Unmatched XML declaration start\n" );
1419 
1420  return true;
1421  } elseif ( substr( $contents, 0, 4 ) == "\x4C\x6F\xA7\x94" ) {
1422  // EBCDIC encoded XML
1423  wfDebug( __METHOD__ . ": EBCDIC Encoded XML\n" );
1424 
1425  return true;
1426  }
1427 
1428  // It's possible the file is encoded with multi-byte encoding, so re-encode attempt to
1429  // detect the encoding in case is specifies an encoding not whitelisted in self::$safeXmlEncodings
1430  $attemptEncodings = [ 'UTF-16', 'UTF-16BE', 'UTF-32', 'UTF-32BE' ];
1431  foreach ( $attemptEncodings as $encoding ) {
1432  Wikimedia\suppressWarnings();
1433  $str = iconv( $encoding, 'UTF-8', $contents );
1434  Wikimedia\restoreWarnings();
1435  if ( $str != '' && preg_match( "!<\?xml\b(.*?)\?>!si", $str, $matches ) ) {
1436  if ( preg_match( $encodingRegex, $matches[1], $encMatch )
1437  && !in_array( strtoupper( $encMatch[1] ), self::$safeXmlEncodings )
1438  ) {
1439  wfDebug( __METHOD__ . ": Found unsafe XML encoding '{$encMatch[1]}'\n" );
1440 
1441  return true;
1442  }
1443  } elseif ( $str != '' && preg_match( "!<\?xml\b!si", $str ) ) {
1444  // Start of XML declaration without an end in the first $wgSVGMetadataCutoff
1445  // bytes. There shouldn't be a legitimate reason for this to happen.
1446  wfDebug( __METHOD__ . ": Unmatched XML declaration start\n" );
1447 
1448  return true;
1449  }
1450  }
1451 
1452  return false;
1453  }
1454 
1460  protected function detectScriptInSvg( $filename, $partial ) {
1461  $this->mSVGNSError = false;
1462  $check = new XmlTypeCheck(
1463  $filename,
1464  [ $this, 'checkSvgScriptCallback' ],
1465  true,
1466  [
1467  'processing_instruction_handler' => 'UploadBase::checkSvgPICallback',
1468  'external_dtd_handler' => 'UploadBase::checkSvgExternalDTD',
1469  ]
1470  );
1471  if ( $check->wellFormed !== true ) {
1472  // Invalid xml (T60553)
1473  // But only when non-partial (T67724)
1474  return $partial ? false : [ 'uploadinvalidxml' ];
1475  } elseif ( $check->filterMatch ) {
1476  if ( $this->mSVGNSError ) {
1477  return [ 'uploadscriptednamespace', $this->mSVGNSError ];
1478  }
1479 
1480  return $check->filterMatchType;
1481  }
1482 
1483  return false;
1484  }
1485 
1492  public static function checkSvgPICallback( $target, $data ) {
1493  // Don't allow external stylesheets (T59550)
1494  if ( preg_match( '/xml-stylesheet/i', $target ) ) {
1495  return [ 'upload-scripted-pi-callback' ];
1496  }
1497 
1498  return false;
1499  }
1500 
1512  public static function checkSvgExternalDTD( $type, $publicId, $systemId ) {
1513  // This doesn't include the XHTML+MathML+SVG doctype since we don't
1514  // allow XHTML anyways.
1515  $allowedDTDs = [
1516  'http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd',
1517  'http://www.w3.org/TR/2001/REC-SVG-20010904/DTD/svg10.dtd',
1518  'http://www.w3.org/Graphics/SVG/1.1/DTD/svg11-basic.dtd',
1519  'http://www.w3.org/Graphics/SVG/1.1/DTD/svg11-tiny.dtd',
1520  // https://phabricator.wikimedia.org/T168856
1521  'http://www.w3.org/TR/2001/PR-SVG-20010719/DTD/svg10.dtd',
1522  ];
1523  if ( $type !== 'PUBLIC'
1524  || !in_array( $systemId, $allowedDTDs )
1525  || strpos( $publicId, "-//W3C//" ) !== 0
1526  ) {
1527  return [ 'upload-scripted-dtd' ];
1528  }
1529  return false;
1530  }
1531 
1539  public function checkSvgScriptCallback( $element, $attribs, $data = null ) {
1540  list( $namespace, $strippedElement ) = $this->splitXmlNamespace( $element );
1541 
1542  // We specifically don't include:
1543  // http://www.w3.org/1999/xhtml (T62771)
1544  static $validNamespaces = [
1545  '',
1546  'adobe:ns:meta/',
1547  'http://creativecommons.org/ns#',
1548  'http://inkscape.sourceforge.net/dtd/sodipodi-0.dtd',
1549  'http://ns.adobe.com/adobeillustrator/10.0/',
1550  'http://ns.adobe.com/adobesvgviewerextensions/3.0/',
1551  'http://ns.adobe.com/extensibility/1.0/',
1552  'http://ns.adobe.com/flows/1.0/',
1553  'http://ns.adobe.com/illustrator/1.0/',
1554  'http://ns.adobe.com/imagereplacement/1.0/',
1555  'http://ns.adobe.com/pdf/1.3/',
1556  'http://ns.adobe.com/photoshop/1.0/',
1557  'http://ns.adobe.com/saveforweb/1.0/',
1558  'http://ns.adobe.com/variables/1.0/',
1559  'http://ns.adobe.com/xap/1.0/',
1560  'http://ns.adobe.com/xap/1.0/g/',
1561  'http://ns.adobe.com/xap/1.0/g/img/',
1562  'http://ns.adobe.com/xap/1.0/mm/',
1563  'http://ns.adobe.com/xap/1.0/rights/',
1564  'http://ns.adobe.com/xap/1.0/stype/dimensions#',
1565  'http://ns.adobe.com/xap/1.0/stype/font#',
1566  'http://ns.adobe.com/xap/1.0/stype/manifestitem#',
1567  'http://ns.adobe.com/xap/1.0/stype/resourceevent#',
1568  'http://ns.adobe.com/xap/1.0/stype/resourceref#',
1569  'http://ns.adobe.com/xap/1.0/t/pg/',
1570  'http://purl.org/dc/elements/1.1/',
1571  'http://purl.org/dc/elements/1.1',
1572  'http://schemas.microsoft.com/visio/2003/svgextensions/',
1573  'http://sodipodi.sourceforge.net/dtd/sodipodi-0.dtd',
1574  'http://taptrix.com/inkpad/svg_extensions',
1575  'http://web.resource.org/cc/',
1576  'http://www.freesoftware.fsf.org/bkchem/cdml',
1577  'http://www.inkscape.org/namespaces/inkscape',
1578  'http://www.opengis.net/gml',
1579  'http://www.w3.org/1999/02/22-rdf-syntax-ns#',
1580  'http://www.w3.org/2000/svg',
1581  'http://www.w3.org/tr/rec-rdf-syntax/',
1582  'http://www.w3.org/2000/01/rdf-schema#',
1583  ];
1584 
1585  // Inkscape mangles namespace definitions created by Adobe Illustrator.
1586  // This is nasty but harmless. (T144827)
1587  $isBuggyInkscape = preg_match( '/^&(#38;)*ns_[a-z_]+;$/', $namespace );
1588 
1589  if ( !( $isBuggyInkscape || in_array( $namespace, $validNamespaces ) ) ) {
1590  wfDebug( __METHOD__ . ": Non-svg namespace '$namespace' in uploaded file.\n" );
1592  $this->mSVGNSError = $namespace;
1593 
1594  return true;
1595  }
1596 
1597  /*
1598  * check for elements that can contain javascript
1599  */
1600  if ( $strippedElement == 'script' ) {
1601  wfDebug( __METHOD__ . ": Found script element '$element' in uploaded file.\n" );
1602 
1603  return [ 'uploaded-script-svg', $strippedElement ];
1604  }
1605 
1606  # e.g., <svg xmlns="http://www.w3.org/2000/svg">
1607  # <handler xmlns:ev="http://www.w3.org/2001/xml-events" ev:event="load">alert(1)</handler> </svg>
1608  if ( $strippedElement == 'handler' ) {
1609  wfDebug( __METHOD__ . ": Found scriptable element '$element' in uploaded file.\n" );
1610 
1611  return [ 'uploaded-script-svg', $strippedElement ];
1612  }
1613 
1614  # SVG reported in Feb '12 that used xml:stylesheet to generate javascript block
1615  if ( $strippedElement == 'stylesheet' ) {
1616  wfDebug( __METHOD__ . ": Found scriptable element '$element' in uploaded file.\n" );
1617 
1618  return [ 'uploaded-script-svg', $strippedElement ];
1619  }
1620 
1621  # Block iframes, in case they pass the namespace check
1622  if ( $strippedElement == 'iframe' ) {
1623  wfDebug( __METHOD__ . ": iframe in uploaded file.\n" );
1624 
1625  return [ 'uploaded-script-svg', $strippedElement ];
1626  }
1627 
1628  # Check <style> css
1629  if ( $strippedElement == 'style'
1630  && self::checkCssFragment( Sanitizer::normalizeCss( $data ) )
1631  ) {
1632  wfDebug( __METHOD__ . ": hostile css in style element.\n" );
1633  return [ 'uploaded-hostile-svg' ];
1634  }
1635 
1636  foreach ( $attribs as $attrib => $value ) {
1637  $stripped = $this->stripXmlNamespace( $attrib );
1638  $value = strtolower( $value );
1639 
1640  if ( substr( $stripped, 0, 2 ) == 'on' ) {
1641  wfDebug( __METHOD__
1642  . ": Found event-handler attribute '$attrib'='$value' in uploaded file.\n" );
1643 
1644  return [ 'uploaded-event-handler-on-svg', $attrib, $value ];
1645  }
1646 
1647  # Do not allow relative links, or unsafe url schemas.
1648  # For <a> tags, only data:, http: and https: and same-document
1649  # fragment links are allowed. For all other tags, only data:
1650  # and fragment are allowed.
1651  if ( $stripped == 'href'
1652  && $value !== ''
1653  && strpos( $value, 'data:' ) !== 0
1654  && strpos( $value, '#' ) !== 0
1655  ) {
1656  if ( !( $strippedElement === 'a'
1657  && preg_match( '!^https?://!i', $value ) )
1658  ) {
1659  wfDebug( __METHOD__ . ": Found href attribute <$strippedElement "
1660  . "'$attrib'='$value' in uploaded file.\n" );
1661 
1662  return [ 'uploaded-href-attribute-svg', $strippedElement, $attrib, $value ];
1663  }
1664  }
1665 
1666  # only allow data: targets that should be safe. This prevents vectors like,
1667  # image/svg, text/xml, application/xml, and text/html, which can contain scripts
1668  if ( $stripped == 'href' && strncasecmp( 'data:', $value, 5 ) === 0 ) {
1669  // rfc2397 parameters. This is only slightly slower than (;[\w;]+)*.
1670  // phpcs:ignore Generic.Files.LineLength
1671  $parameters = '(?>;[a-zA-Z0-9\!#$&\'*+.^_`{|}~-]+=(?>[a-zA-Z0-9\!#$&\'*+.^_`{|}~-]+|"(?>[\0-\x0c\x0e-\x21\x23-\x5b\x5d-\x7f]+|\\\\[\0-\x7f])*"))*(?:;base64)?';
1672 
1673  if ( !preg_match( "!^data:\s*image/(gif|jpeg|jpg|png)$parameters,!i", $value ) ) {
1674  wfDebug( __METHOD__ . ": Found href to unwhitelisted data: uri "
1675  . "\"<$strippedElement '$attrib'='$value'...\" in uploaded file.\n" );
1676  return [ 'uploaded-href-unsafe-target-svg', $strippedElement, $attrib, $value ];
1677  }
1678  }
1679 
1680  # Change href with animate from (http://html5sec.org/#137).
1681  if ( $stripped === 'attributename'
1682  && $strippedElement === 'animate'
1683  && $this->stripXmlNamespace( $value ) == 'href'
1684  ) {
1685  wfDebug( __METHOD__ . ": Found animate that might be changing href using from "
1686  . "\"<$strippedElement '$attrib'='$value'...\" in uploaded file.\n" );
1687 
1688  return [ 'uploaded-animate-svg', $strippedElement, $attrib, $value ];
1689  }
1690 
1691  # use set/animate to add event-handler attribute to parent
1692  if ( ( $strippedElement == 'set' || $strippedElement == 'animate' )
1693  && $stripped == 'attributename'
1694  && substr( $value, 0, 2 ) == 'on'
1695  ) {
1696  wfDebug( __METHOD__ . ": Found svg setting event-handler attribute with "
1697  . "\"<$strippedElement $stripped='$value'...\" in uploaded file.\n" );
1698 
1699  return [ 'uploaded-setting-event-handler-svg', $strippedElement, $stripped, $value ];
1700  }
1701 
1702  # use set to add href attribute to parent element
1703  if ( $strippedElement == 'set'
1704  && $stripped == 'attributename'
1705  && strpos( $value, 'href' ) !== false
1706  ) {
1707  wfDebug( __METHOD__ . ": Found svg setting href attribute '$value' in uploaded file.\n" );
1708 
1709  return [ 'uploaded-setting-href-svg' ];
1710  }
1711 
1712  # use set to add a remote / data / script target to an element
1713  if ( $strippedElement == 'set'
1714  && $stripped == 'to'
1715  && preg_match( '!(http|https|data|script):!sim', $value )
1716  ) {
1717  wfDebug( __METHOD__ . ": Found svg setting attribute to '$value' in uploaded file.\n" );
1718 
1719  return [ 'uploaded-wrong-setting-svg', $value ];
1720  }
1721 
1722  # use handler attribute with remote / data / script
1723  if ( $stripped == 'handler' && preg_match( '!(http|https|data|script):!sim', $value ) ) {
1724  wfDebug( __METHOD__ . ": Found svg setting handler with remote/data/script "
1725  . "'$attrib'='$value' in uploaded file.\n" );
1726 
1727  return [ 'uploaded-setting-handler-svg', $attrib, $value ];
1728  }
1729 
1730  # use CSS styles to bring in remote code
1731  if ( $stripped == 'style'
1732  && self::checkCssFragment( Sanitizer::normalizeCss( $value ) )
1733  ) {
1734  wfDebug( __METHOD__ . ": Found svg setting a style with "
1735  . "remote url '$attrib'='$value' in uploaded file.\n" );
1736  return [ 'uploaded-remote-url-svg', $attrib, $value ];
1737  }
1738 
1739  # Several attributes can include css, css character escaping isn't allowed
1740  $cssAttrs = [ 'font', 'clip-path', 'fill', 'filter', 'marker',
1741  'marker-end', 'marker-mid', 'marker-start', 'mask', 'stroke' ];
1742  if ( in_array( $stripped, $cssAttrs )
1743  && self::checkCssFragment( $value )
1744  ) {
1745  wfDebug( __METHOD__ . ": Found svg setting a style with "
1746  . "remote url '$attrib'='$value' in uploaded file.\n" );
1747  return [ 'uploaded-remote-url-svg', $attrib, $value ];
1748  }
1749 
1750  # image filters can pull in url, which could be svg that executes scripts
1751  # Only allow url( "#foo" ). Do not allow url( http://example.com )
1752  if ( $strippedElement == 'image'
1753  && $stripped == 'filter'
1754  && preg_match( '!url\s*\(\s*["\']?[^#]!sim', $value )
1755  ) {
1756  wfDebug( __METHOD__ . ": Found image filter with url: "
1757  . "\"<$strippedElement $stripped='$value'...\" in uploaded file.\n" );
1758 
1759  return [ 'uploaded-image-filter-svg', $strippedElement, $stripped, $value ];
1760  }
1761  }
1762 
1763  return false; // No scripts detected
1764  }
1765 
1772  private static function checkCssFragment( $value ) {
1773  # Forbid external stylesheets, for both reliability and to protect viewer's privacy
1774  if ( stripos( $value, '@import' ) !== false ) {
1775  return true;
1776  }
1777 
1778  # We allow @font-face to embed fonts with data: urls, so we snip the string
1779  # 'url' out so this case won't match when we check for urls below
1780  $pattern = '!(@font-face\s*{[^}]*src:)url(\("data:;base64,)!im';
1781  $value = preg_replace( $pattern, '$1$2', $value );
1782 
1783  # Check for remote and executable CSS. Unlike in Sanitizer::checkCss, the CSS
1784  # properties filter and accelerator don't seem to be useful for xss in SVG files.
1785  # Expression and -o-link don't seem to work either, but filtering them here in case.
1786  # Additionally, we catch remote urls like url("http:..., url('http:..., url(http:...,
1787  # but not local ones such as url("#..., url('#..., url(#....
1788  if ( preg_match( '!expression
1789  | -o-link\s*:
1790  | -o-link-source\s*:
1791  | -o-replace\s*:!imx', $value ) ) {
1792  return true;
1793  }
1794 
1795  if ( preg_match_all(
1796  "!(\s*(url|image|image-set)\s*\(\s*[\"']?\s*[^#]+.*?\))!sim",
1797  $value,
1798  $matches
1799  ) !== 0
1800  ) {
1801  # TODO: redo this in one regex. Until then, url("#whatever") matches the first
1802  foreach ( $matches[1] as $match ) {
1803  if ( !preg_match( "!\s*(url|image|image-set)\s*\(\s*(#|'#|\"#)!im", $match ) ) {
1804  return true;
1805  }
1806  }
1807  }
1808 
1809  if ( preg_match( '/[\000-\010\013\016-\037\177]/', $value ) ) {
1810  return true;
1811  }
1812 
1813  return false;
1814  }
1815 
1821  private static function splitXmlNamespace( $element ) {
1822  // 'http://www.w3.org/2000/svg:script' -> [ 'http://www.w3.org/2000/svg', 'script' ]
1823  $parts = explode( ':', strtolower( $element ) );
1824  $name = array_pop( $parts );
1825  $ns = implode( ':', $parts );
1826 
1827  return [ $ns, $name ];
1828  }
1829 
1834  private function stripXmlNamespace( $name ) {
1835  // 'http://www.w3.org/2000/svg:script' -> 'script'
1836  $parts = explode( ':', strtolower( $name ) );
1837 
1838  return array_pop( $parts );
1839  }
1840 
1851  public static function detectVirus( $file ) {
1853 
1854  if ( !$wgAntivirus ) {
1855  wfDebug( __METHOD__ . ": virus scanner disabled\n" );
1856 
1857  return null;
1858  }
1859 
1860  if ( !$wgAntivirusSetup[$wgAntivirus] ) {
1861  wfDebug( __METHOD__ . ": unknown virus scanner: $wgAntivirus\n" );
1862  $wgOut->wrapWikiMsg( "<div class=\"error\">\n$1\n</div>",
1863  [ 'virus-badscanner', $wgAntivirus ] );
1864 
1865  return wfMessage( 'virus-unknownscanner' )->text() . " $wgAntivirus";
1866  }
1867 
1868  # look up scanner configuration
1869  $command = $wgAntivirusSetup[$wgAntivirus]['command'];
1870  $exitCodeMap = $wgAntivirusSetup[$wgAntivirus]['codemap'];
1871  $msgPattern = $wgAntivirusSetup[$wgAntivirus]['messagepattern'] ?? null;
1872 
1873  if ( strpos( $command, "%f" ) === false ) {
1874  # simple pattern: append file to scan
1875  $command .= " " . Shell::escape( $file );
1876  } else {
1877  # complex pattern: replace "%f" with file to scan
1878  $command = str_replace( "%f", Shell::escape( $file ), $command );
1879  }
1880 
1881  wfDebug( __METHOD__ . ": running virus scan: $command \n" );
1882 
1883  # execute virus scanner
1884  $exitCode = false;
1885 
1886  # NOTE: there's a 50 line workaround to make stderr redirection work on windows, too.
1887  # that does not seem to be worth the pain.
1888  # Ask me (Duesentrieb) about it if it's ever needed.
1889  $output = wfShellExecWithStderr( $command, $exitCode );
1890 
1891  # map exit code to AV_xxx constants.
1892  $mappedCode = $exitCode;
1893  if ( $exitCodeMap ) {
1894  if ( isset( $exitCodeMap[$exitCode] ) ) {
1895  $mappedCode = $exitCodeMap[$exitCode];
1896  } elseif ( isset( $exitCodeMap["*"] ) ) {
1897  $mappedCode = $exitCodeMap["*"];
1898  }
1899  }
1900 
1901  /* NB: AV_NO_VIRUS is 0 but AV_SCAN_FAILED is false,
1902  * so we need the strict equalities === and thus can't use a switch here
1903  */
1904  if ( $mappedCode === AV_SCAN_FAILED ) {
1905  # scan failed (code was mapped to false by $exitCodeMap)
1906  wfDebug( __METHOD__ . ": failed to scan $file (code $exitCode).\n" );
1907 
1909  ? wfMessage( 'virus-scanfailed', [ $exitCode ] )->text()
1910  : null;
1911  } elseif ( $mappedCode === AV_SCAN_ABORTED ) {
1912  # scan failed because filetype is unknown (probably imune)
1913  wfDebug( __METHOD__ . ": unsupported file type $file (code $exitCode).\n" );
1914  $output = null;
1915  } elseif ( $mappedCode === AV_NO_VIRUS ) {
1916  # no virus found
1917  wfDebug( __METHOD__ . ": file passed virus scan.\n" );
1918  $output = false;
1919  } else {
1920  $output = trim( $output );
1921 
1922  if ( !$output ) {
1923  $output = true; # if there's no output, return true
1924  } elseif ( $msgPattern ) {
1925  $groups = [];
1926  if ( preg_match( $msgPattern, $output, $groups ) && $groups[1] ) {
1927  $output = $groups[1];
1928  }
1929  }
1930 
1931  wfDebug( __METHOD__ . ": FOUND VIRUS! scanner feedback: $output \n" );
1932  }
1933 
1934  return $output;
1935  }
1936 
1945  private function checkOverwrite( $user ) {
1946  // First check whether the local file can be overwritten
1947  $file = $this->getLocalFile();
1948  $file->load( File::READ_LATEST );
1949  if ( $file->exists() ) {
1950  if ( !self::userCanReUpload( $user, $file ) ) {
1951  return [ 'fileexists-forbidden', $file->getName() ];
1952  } else {
1953  return true;
1954  }
1955  }
1956 
1957  /* Check shared conflicts: if the local file does not exist, but
1958  * wfFindFile finds a file, it exists in a shared repository.
1959  */
1960  $file = wfFindFile( $this->getTitle(), [ 'latest' => true ] );
1961  if ( $file && !MediaWikiServices::getInstance()
1962  ->getPermissionManager()
1963  ->userHasRight( $user, 'reupload-shared' )
1964  ) {
1965  return [ 'fileexists-shared-forbidden', $file->getName() ];
1966  }
1967 
1968  return true;
1969  }
1970 
1978  public static function userCanReUpload( User $user, File $img ) {
1979  $permissionManager = MediaWikiServices::getInstance()->getPermissionManager();
1980  if ( $permissionManager->userHasRight( $user, 'reupload' ) ) {
1981  return true; // non-conditional
1982  } elseif ( !$permissionManager->userHasRight( $user, 'reupload-own' ) ) {
1983  return false;
1984  }
1985 
1986  if ( !( $img instanceof LocalFile ) ) {
1987  return false;
1988  }
1989 
1990  $img->load();
1991 
1992  return $user->getId() == $img->getUser( 'id' );
1993  }
1994 
2006  public static function getExistsWarning( $file ) {
2007  if ( $file->exists() ) {
2008  return [ 'warning' => 'exists', 'file' => $file ];
2009  }
2010 
2011  if ( $file->getTitle()->getArticleID() ) {
2012  return [ 'warning' => 'page-exists', 'file' => $file ];
2013  }
2014 
2015  if ( strpos( $file->getName(), '.' ) == false ) {
2016  $partname = $file->getName();
2017  $extension = '';
2018  } else {
2019  $n = strrpos( $file->getName(), '.' );
2020  $extension = substr( $file->getName(), $n + 1 );
2021  $partname = substr( $file->getName(), 0, $n );
2022  }
2023  $normalizedExtension = File::normalizeExtension( $extension );
2024 
2025  if ( $normalizedExtension != $extension ) {
2026  // We're not using the normalized form of the extension.
2027  // Normal form is lowercase, using most common of alternate
2028  // extensions (eg 'jpg' rather than 'JPEG').
2029 
2030  // Check for another file using the normalized form...
2031  $nt_lc = Title::makeTitle( NS_FILE, "{$partname}.{$normalizedExtension}" );
2032  $file_lc = wfLocalFile( $nt_lc );
2033 
2034  if ( $file_lc->exists() ) {
2035  return [
2036  'warning' => 'exists-normalized',
2037  'file' => $file,
2038  'normalizedFile' => $file_lc
2039  ];
2040  }
2041  }
2042 
2043  // Check for files with the same name but a different extension
2044  $similarFiles = RepoGroup::singleton()->getLocalRepo()->findFilesByPrefix(
2045  "{$partname}.", 1 );
2046  if ( count( $similarFiles ) ) {
2047  return [
2048  'warning' => 'exists-normalized',
2049  'file' => $file,
2050  'normalizedFile' => $similarFiles[0],
2051  ];
2052  }
2053 
2054  if ( self::isThumbName( $file->getName() ) ) {
2055  # Check for filenames like 50px- or 180px-, these are mostly thumbnails
2056  $nt_thb = Title::newFromText(
2057  substr( $partname, strpos( $partname, '-' ) + 1 ) . '.' . $extension,
2058  NS_FILE
2059  );
2060  $file_thb = wfLocalFile( $nt_thb );
2061  if ( $file_thb->exists() ) {
2062  return [
2063  'warning' => 'thumb',
2064  'file' => $file,
2065  'thumbFile' => $file_thb
2066  ];
2067  } else {
2068  // File does not exist, but we just don't like the name
2069  return [
2070  'warning' => 'thumb-name',
2071  'file' => $file,
2072  'thumbFile' => $file_thb
2073  ];
2074  }
2075  }
2076 
2077  foreach ( self::getFilenamePrefixBlacklist() as $prefix ) {
2078  if ( substr( $partname, 0, strlen( $prefix ) ) == $prefix ) {
2079  return [
2080  'warning' => 'bad-prefix',
2081  'file' => $file,
2082  'prefix' => $prefix
2083  ];
2084  }
2085  }
2086 
2087  return false;
2088  }
2089 
2095  public static function isThumbName( $filename ) {
2096  $n = strrpos( $filename, '.' );
2097  $partname = $n ? substr( $filename, 0, $n ) : $filename;
2098 
2099  return (
2100  substr( $partname, 3, 3 ) == 'px-' ||
2101  substr( $partname, 2, 3 ) == 'px-'
2102  ) &&
2103  preg_match( "/[0-9]{2}/", substr( $partname, 0, 2 ) );
2104  }
2105 
2111  public static function getFilenamePrefixBlacklist() {
2112  $blacklist = [];
2113  $message = wfMessage( 'filename-prefix-blacklist' )->inContentLanguage();
2114  if ( !$message->isDisabled() ) {
2115  $lines = explode( "\n", $message->plain() );
2116  foreach ( $lines as $line ) {
2117  // Remove comment lines
2118  $comment = substr( trim( $line ), 0, 1 );
2119  if ( $comment == '#' || $comment == '' ) {
2120  continue;
2121  }
2122  // Remove additional comments after a prefix
2123  $comment = strpos( $line, '#' );
2124  if ( $comment > 0 ) {
2125  $line = substr( $line, 0, $comment - 1 );
2126  }
2127  $blacklist[] = trim( $line );
2128  }
2129  }
2130 
2131  return $blacklist;
2132  }
2133 
2145  public function getImageInfo( $result ) {
2146  $localFile = $this->getLocalFile();
2147  $stashFile = $this->getStashFile();
2148  // Calling a different API module depending on whether the file was stashed is less than optimal.
2149  // In fact, calling API modules here at all is less than optimal. Maybe it should be refactored.
2150  if ( $stashFile ) {
2152  $info = ApiQueryStashImageInfo::getInfo( $stashFile, array_flip( $imParam ), $result );
2153  } else {
2155  $info = ApiQueryImageInfo::getInfo( $localFile, array_flip( $imParam ), $result );
2156  }
2157 
2158  return $info;
2159  }
2160 
2165  public function convertVerifyErrorToStatus( $error ) {
2166  $code = $error['status'];
2167  unset( $code['status'] );
2168 
2169  return Status::newFatal( $this->getVerificationErrorCode( $code ), $error );
2170  }
2171 
2179  public static function getMaxUploadSize( $forType = null ) {
2180  global $wgMaxUploadSize;
2181 
2182  if ( is_array( $wgMaxUploadSize ) ) {
2183  if ( !is_null( $forType ) && isset( $wgMaxUploadSize[$forType] ) ) {
2184  return $wgMaxUploadSize[$forType];
2185  } else {
2186  return $wgMaxUploadSize['*'];
2187  }
2188  } else {
2189  return intval( $wgMaxUploadSize );
2190  }
2191  }
2192 
2200  public static function getMaxPhpUploadSize() {
2201  $phpMaxFileSize = wfShorthandToInteger(
2202  ini_get( 'upload_max_filesize' ) ?: ini_get( 'hhvm.server.upload.upload_max_file_size' ),
2203  PHP_INT_MAX
2204  );
2205  $phpMaxPostSize = wfShorthandToInteger(
2206  ini_get( 'post_max_size' ) ?: ini_get( 'hhvm.server.max_post_size' ),
2207  PHP_INT_MAX
2208  ) ?: PHP_INT_MAX;
2209  return min( $phpMaxFileSize, $phpMaxPostSize );
2210  }
2211 
2221  public static function getSessionStatus( User $user, $statusKey ) {
2222  $store = self::getUploadSessionStore();
2223  $key = self::getUploadSessionKey( $store, $user, $statusKey );
2224 
2225  return $store->get( $key );
2226  }
2227 
2240  public static function setSessionStatus( User $user, $statusKey, $value ) {
2241  $store = self::getUploadSessionStore();
2242  $key = self::getUploadSessionKey( $store, $user, $statusKey );
2243 
2244  if ( $value === false ) {
2245  $store->delete( $key );
2246  } else {
2247  $store->set( $key, $value, $store::TTL_DAY );
2248  }
2249  }
2250 
2257  private static function getUploadSessionKey( BagOStuff $store, User $user, $statusKey ) {
2258  return $store->makeKey(
2259  'uploadstatus',
2260  $user->getId() ?: md5( $user->getName() ),
2261  $statusKey
2262  );
2263  }
2264 
2268  private static function getUploadSessionStore() {
2269  return ObjectCache::getInstance( 'db-replicated' );
2270  }
2271 }
AV_NO_VIRUS
const AV_NO_VIRUS
Definition: Defines.php:91
LocalFile\getSha1
getSha1()
Definition: LocalFile.php:2151
File\wasDeleted
wasDeleted()
Was this file ever deleted from the wiki?
Definition: File.php:1918
$wgAllowJavaUploads
$wgAllowJavaUploads
Allow Java archive uploads.
Definition: DefaultSettings.php:981
MediaWiki\Shell\Shell
Executes shell commands.
Definition: Shell.php:44
ApiQueryImageInfo\getPropertyNames
static getPropertyNames( $filter=[])
Returns all possible parameters to iiprop.
Definition: ApiQueryImageInfo.php:734
Title\newFromText
static newFromText( $text, $defaultNamespace=NS_MAIN)
Create a new Title from text, such as what one would find in a link.
Definition: Title.php:316
ApiQueryStashImageInfo\getPropertyNames
static getPropertyNames( $filter=null)
Returns all possible parameters to siiprop.
Definition: ApiQueryStashImageInfo.php:84
RepoGroup\singleton
static singleton()
Definition: RepoGroup.php:60
$wgFileBlacklist
$wgFileBlacklist
Files with these extensions will never be allowed as uploads.
Definition: DefaultSettings.php:949
StatusValue\newFatal
static newFatal( $message,... $parameters)
Factory function for fatal errors.
Definition: StatusValue.php:69
User\getId
getId()
Get the user's ID.
Definition: User.php:2203
AV_SCAN_FAILED
const AV_SCAN_FAILED
Definition: Defines.php:94
MediaWiki\MediaWikiServices
MediaWikiServices is the service locator for the application scope of MediaWiki.
Definition: MediaWikiServices.php:117
$wgMaxUploadSize
$wgMaxUploadSize
Max size for uploads, in bytes.
Definition: DefaultSettings.php:868
$wgFileExtensions
$wgFileExtensions
This is the list of preferred extensions for uploading files.
Definition: DefaultSettings.php:942
LocalFile\getHistory
getHistory( $limit=null, $start=null, $end=null, $inc=true)
purgeDescription inherited
Definition: LocalFile.php:1167
NS_FILE
const NS_FILE
Definition: Defines.php:66
$file
if(PHP_SAPI !='cli-server') if(!isset( $_SERVER['SCRIPT_FILENAME'])) $file
Item class for a filearchive table row.
Definition: router.php:42
UploadStashFile
Definition: UploadStashFile.php:24
BagOStuff
Class representing a cache/ephemeral data store.
Definition: BagOStuff.php:63
$wgMimeTypeBlacklist
$wgMimeTypeBlacklist
Files with these MIME types will never be allowed as uploads if $wgVerifyMimeType is enabled.
Definition: DefaultSettings.php:963
wfMessage
wfMessage( $key,... $params)
This is the function for getting translated interface messages.
Definition: GlobalFunctions.php:1264
$wgVerifyMimeTypeIE
$wgVerifyMimeTypeIE
Determines whether extra checks for IE type detection should be applied.
Definition: DefaultSettings.php:1406
$wgStrictFileExtensions
$wgStrictFileExtensions
If this is turned off, users may override the warning for files not covered by $wgFileExtensions.
Definition: DefaultSettings.php:996
ApiQueryImageInfo\getInfo
static getInfo( $file, $prop, $result, $thumbParams=null, $opts=false)
Get result information for an image revision.
Definition: ApiQueryImageInfo.php:374
MediaWiki\User\UserIdentity
Interface for objects representing user identity.
Definition: UserIdentity.php:32
AV_SCAN_ABORTED
const AV_SCAN_ABORTED
Definition: Defines.php:93
MediaWiki\MediaWikiServices\getInstance
static getInstance()
Returns the global default instance of the top level service locator.
Definition: MediaWikiServices.php:138
WatchAction\doWatch
static doWatch(Title $title, User $user, $checkRights=User::CHECK_USER_RIGHTS)
Watch a page.
Definition: WatchAction.php:116
File
Implements some public methods and some protected utility functions which are required by multiple ch...
Definition: File.php:61
Title\getDBkey
getDBkey()
Get the main part with underscores.
Definition: Title.php:1013
BagOStuff\get
get( $key, $flags=0)
Get an item with the given key.
MWException
MediaWiki exception.
Definition: MWException.php:26
wfStripIllegalFilenameChars
wfStripIllegalFilenameChars( $name)
Replace all invalid characters with '-'.
Definition: GlobalFunctions.php:2753
$wgUploadSizeWarning
$wgUploadSizeWarning
Warn if uploaded files are larger than this (in bytes), or false to disable.
Definition: DefaultSettings.php:1009
wfDeprecated
wfDeprecated( $function, $version=false, $component=false, $callerOffset=2)
Throws a warning that $function is deprecated.
Definition: GlobalFunctions.php:1044
$wgAntivirusRequired
$wgAntivirusRequired
Determines if a failed virus scan (AV_SCAN_FAILED) will cause the file to be rejected.
Definition: DefaultSettings.php:1391
wfArrayDiff2
wfArrayDiff2( $a, $b)
Like array_diff( $a, $b ) except that it works with two-dimensional arrays.
Definition: GlobalFunctions.php:113
FileBackend\isStoragePath
static isStoragePath( $path)
Check if a given path is a "mwstore://" path.
Definition: FileBackend.php:1508
$matches
$matches
Definition: NoLocalSettings.php:24
FSFile\getSha1Base36FromPath
static getSha1Base36FromPath( $path)
Get a SHA-1 hash of a file in the local filesystem, in base-36 lower case encoding,...
Definition: FSFile.php:225
$wgLang
$wgLang
Definition: Setup.php:881
$wgAntivirusSetup
$wgAntivirusSetup
Configuration for different virus scanners.
Definition: DefaultSettings.php:1373
MediaWiki
This class serves as a utility class for this extension.
ObjectCache\getInstance
static getInstance( $id)
Get a cached instance of the specified type of cache object.
Definition: ObjectCache.php:80
$lines
$lines
Definition: router.php:61
$title
$title
Definition: testCompression.php:34
MWFileProps
MimeMagic helper wrapper.
Definition: MWFileProps.php:28
Title\makeTitle
static makeTitle( $ns, $title, $fragment='', $interwiki='')
Create a new Title from a namespace index and a DB key.
Definition: Title.php:586
$output
$output
Definition: SyntaxHighlight.php:335
wfDebug
wfDebug( $text, $dest='all', array $context=[])
Sends a line to the debug log if enabled or, optionally, to a comment in output.
Definition: GlobalFunctions.php:913
LocalFile
Class to represent a local file in the wiki's own database.
Definition: LocalFile.php:56
$wgSVGMetadataCutoff
$wgSVGMetadataCutoff
Don't read SVG metadata beyond this point.
Definition: DefaultSettings.php:1224
$command
$command
Definition: cdb.php:65
$line
$line
Definition: cdb.php:59
Title\makeTitleSafe
static makeTitleSafe( $ns, $title, $fragment='', $interwiki='')
Create a new Title from a namespace index and a DB key.
Definition: Title.php:613
ArchivedFile
Class representing a row of the 'filearchive' table.
Definition: ArchivedFile.php:31
StatusValue\newGood
static newGood( $value=null)
Factory function for good results.
Definition: StatusValue.php:81
LocalFile\load
load( $flags=0)
Load file metadata from cache or DB, unless already loaded.
Definition: LocalFile.php:620
TempFSFile
This class is used to hold the location and do limited manipulation of files stored temporarily (this...
Definition: TempFSFile.php:35
XmlTypeCheck
Definition: XmlTypeCheck.php:28
File\getName
getName()
Return the name of this file.
Definition: File.php:307
ZipDirectoryReader\read
static read( $fileName, $callback, $options=[])
Read a ZIP file and call a function for each file discovered in it.
Definition: ZipDirectoryReader.php:88
wfIniGetBool
wfIniGetBool( $setting)
Safety wrapper around ini_get() for boolean settings.
Definition: GlobalFunctions.php:2062
File\DELETE_SOURCE
const DELETE_SOURCE
Definition: File.php:76
BagOStuff\makeKey
makeKey( $class,... $components)
Make a cache key, scoped to this instance's keyspace.
wfShorthandToInteger
wfShorthandToInteger( $string='', $default=-1)
Converts shorthand byte notation to integer form.
Definition: GlobalFunctions.php:2817
Title
Represents a title within MediaWiki.
Definition: Title.php:42
$status
return $status
Definition: SyntaxHighlight.php:347
$wgDisableUploadScriptChecks
$wgDisableUploadScriptChecks
Setting this to true will disable the upload system's checks for HTML/JavaScript.
Definition: DefaultSettings.php:1004
Title\capitalize
static capitalize( $text, $ns=NS_MAIN)
Capitalize a text string for a title if it belongs to a namespace that capitalizes.
Definition: Title.php:3280
$path
$path
Definition: NoLocalSettings.php:25
MediaHandler\getHandler
static getHandler( $type)
Get a MediaHandler for a given MIME type from the instance cache.
Definition: MediaHandler.php:46
$wgVerifyMimeType
$wgVerifyMimeType
Determines if the MIME type of uploaded files should be checked.
Definition: DefaultSettings.php:1396
getTitle
getTitle()
Definition: RevisionSearchResultTrait.php:74
FileRepo\isVirtualUrl
static isVirtualUrl( $url)
Determine if a string is an mwrepo:// URL.
Definition: FileRepo.php:263
$wgEnableUploads
$wgEnableUploads
Allow users to upload files.
Definition: DefaultSettings.php:402
$ext
if(!is_readable( $file)) $ext
Definition: router.php:48
File\DELETED_FILE
const DELETED_FILE
Definition: File.php:63
BagOStuff\set
set( $key, $value, $exptime=0, $flags=0)
Set an item.
User\IGNORE_USER_RIGHTS
const IGNORE_USER_RIGHTS
Definition: User.php:83
$wgAntivirus
$wgAntivirus
Internal name of virus scanner.
Definition: DefaultSettings.php:1337
$wgOut
$wgOut
Definition: Setup.php:886
wfIsHHVM
wfIsHHVM()
Check if we are running under HHVM.
Definition: GlobalFunctions.php:1921
User
The User object encapsulates all of the user-specific settings (user_id, name, rights,...
Definition: User.php:51
wfLocalFile
wfLocalFile( $title)
Get an object referring to a locally registered file.
Definition: GlobalFunctions.php:2616
Hooks\run
static run( $event, array $args=[], $deprecatedVersion=null)
Call hook functions defined in Hooks::register and $wgHooks.
Definition: Hooks.php:200
User\getName
getName()
Get the user name, or the IP of an anonymous user.
Definition: User.php:2232
LocalFile\exists
exists()
canRender inherited
Definition: LocalFile.php:969
BagOStuff\delete
delete( $key, $flags=0)
Delete an item.
$wgCheckFileExtensions
$wgCheckFileExtensions
This is a flag to determine whether or not to check file extensions on upload.
Definition: DefaultSettings.php:988
UploadStashException
Definition: UploadStashException.php:26
wfShellExecWithStderr
wfShellExecWithStderr( $cmd, &$retval=null, $environ=[], $limits=[])
Execute a shell command, returning both stdout and stderr.
Definition: GlobalFunctions.php:2180
$mTitle
Title $mTitle
Definition: RevisionSearchResultTrait.php:26
$type
$type
Definition: testCompression.php:48