protected $mBlackListedExtensions;
protected $mJavaDetected;
+ protected static $safeXmlEncodings = array( 'UTF-8', 'ISO-8859-1', 'ISO-8859-2', 'UTF-16', 'UTF-32' );
+
const SUCCESS = 0;
const OK = 0;
const EMPTY_FILE = 3;
wfProfileIn( __METHOD__ );
$repo = RepoGroup::singleton()->getLocalRepo();
if ( $repo->isVirtualUrl( $srcPath ) ) {
- // @TODO: just make uploads work with storage paths
+ // @todo just make uploads work with storage paths
// UploadFromStash loads files via virtual URLs
$tmpFile = $repo->getLocalCopy( $srcPath );
$tmpFile->bind( $this ); // keep alive with $this
}
/**
- * Verify the mime type
+ * Verify the mime type.
*
+ * @note Only checks that it is not an evil mime. The does it have
+ * correct extension given its mime type check is in verifyFile.
* @param string $mime representing the mime
* @return mixed true if the file is verified, an array otherwise
*/
return array( 'filetype-badmime', $mime );
}
- # XXX: Missing extension will be caught by validateName() via getTitle()
- if ( $this->mFinalExtension != '' && !$this->verifyExtension( $mime, $this->mFinalExtension ) ) {
- wfProfileOut( __METHOD__ );
- return array( 'filetype-mime-mismatch', $this->mFinalExtension, $mime );
- }
-
# Check IE type
$fp = fopen( $this->mTempPath, 'rb' );
$chunk = fread( $fp, 256 );
return true;
}
+
/**
* Verifies that it's ok to include the uploaded file
*
* @return mixed true of the file is verified, array otherwise.
*/
protected function verifyFile() {
+ global $wgVerifyMimeType;
+ wfProfileIn( __METHOD__ );
+
+ $status = $this->verifyPartialFile();
+ if ( $status !== true ) {
+ wfProfileOut( __METHOD__ );
+ return $status;
+ }
+
+ if ( $wgVerifyMimeType ) {
+ $this->mFileProps = FSFile::getPropsFromPath( $this->mTempPath, $this->mFinalExtension );
+ $mime = $this->mFileProps['file-mime'];
+
+ # XXX: Missing extension will be caught by validateName() via getTitle()
+ if ( $this->mFinalExtension != '' && !$this->verifyExtension( $mime, $this->mFinalExtension ) ) {
+ wfProfileOut( __METHOD__ );
+ return array( 'filetype-mime-mismatch', $this->mFinalExtension, $mime );
+ }
+ }
+
+
+ $handler = MediaHandler::getHandler( $mime );
+ if ( $handler ) {
+ $handlerStatus = $handler->verifyUpload( $this->mTempPath );
+ if ( !$handlerStatus->isOK() ) {
+ $errors = $handlerStatus->getErrorsArray();
+ wfProfileOut( __METHOD__ );
+ return reset( $errors );
+ }
+ }
+
+ wfRunHooks( 'UploadVerifyFile', array( $this, $mime, &$status ) );
+ if ( $status !== true ) {
+ wfProfileOut( __METHOD__ );
+ return $status;
+ }
+
+ wfDebug( __METHOD__ . ": all clear; passing.\n" );
+ wfProfileOut( __METHOD__ );
+ return true;
+ }
+
+ /**
+ * A verification routine suitable for partial files
+ *
+ * Runs the blacklist checks, but not any checks that may
+ * assume the entire file is present.
+ *
+ * @return Mixed true for valid or array with error message key.
+ */
+ protected function verifyPartialFile() {
global $wgAllowJavaUploads, $wgDisableUploadScriptChecks;
wfProfileIn( __METHOD__ );
- # get the title, even though we are doing nothing with it, because
- # we need to populate mFinalExtension
+ # getTitle() sets some internal parameters like $this->mFinalExtension
$this->getTitle();
$this->mFileProps = FSFile::getPropsFromPath( $this->mTempPath, $this->mFinalExtension );
return array( 'uploadvirus', $virus );
}
- $handler = MediaHandler::getHandler( $mime );
- if ( $handler ) {
- $handlerStatus = $handler->verifyUpload( $this->mTempPath );
- if ( !$handlerStatus->isOK() ) {
- $errors = $handlerStatus->getErrorsArray();
- wfProfileOut( __METHOD__ );
- return reset( $errors );
- }
- }
-
- wfRunHooks( 'UploadVerifyFile', array( $this, $mime, &$status ) );
- if ( $status !== true ) {
- wfProfileOut( __METHOD__ );
- return $status;
- }
-
- wfDebug( __METHOD__ . ": all clear; passing.\n" );
wfProfileOut( __METHOD__ );
return true;
}
if ( $status->isGood() ) {
if ( $watch ) {
- $user->addWatch( $this->getLocalFile()->getTitle() );
+ WatchAction::doWatch( $this->getLocalFile()->getTitle(), $user, WatchedItem::IGNORE_USER_RIGHTS );
}
wfRunHooks( 'UploadComplete', array( &$this ) );
}
if ( $this->mTitle !== false ) {
return $this->mTitle;
}
-
/* Assume that if a user specified File:Something.jpg, this is an error
* and that the namespace prefix needs to be stripped of.
*/
return true;
}
+ // Some browsers will interpret obscure xml encodings as UTF-8, while
+ // PHP/expat will interpret the given encoding in the xml declaration (bug 47304)
+ if ( $extension == 'svg' || strpos( $mime, 'image/svg' ) === 0 ) {
+ if ( self::checkXMLEncodingMissmatch( $file ) ) {
+ wfProfileOut( __METHOD__ );
+ return true;
+ }
+ }
+
/**
* Internet Explorer for Windows performs some really stupid file type
* autodetection which can cause it to interpret valid image files as HTML
return false;
}
+
+ /**
+ * Check a whitelist of xml encodings that are known not to be interpreted differently
+ * by the server's xml parser (expat) and some common browsers.
+ *
+ * @param string $file pathname to the temporary upload file
+ * @return Boolean: true if the file contains an encoding that could be misinterpreted
+ */
+ public static function checkXMLEncodingMissmatch( $file ) {
+ global $wgSVGMetadataCutoff;
+ $contents = file_get_contents( $file, false, null, -1, $wgSVGMetadataCutoff );
+ $encodingRegex = '!encoding[ \t\n\r]*=[ \t\n\r]*[\'"](.*?)[\'"]!si';
+
+ if ( preg_match( "!<\?xml\b(.*?)\?>!si", $contents, $matches ) ) {
+ if ( preg_match( $encodingRegex, $matches[1], $encMatch )
+ && !in_array( strtoupper( $encMatch[1] ), self::$safeXmlEncodings )
+ ) {
+ wfDebug( __METHOD__ . ": Found unsafe XML encoding '{$encMatch[1]}'\n" );
+ return true;
+ }
+ } elseif ( preg_match( "!<\?xml\b!si", $contents ) ) {
+ // Start of XML declaration without an end in the first $wgSVGMetadataCutoff
+ // bytes. There shouldn't be a legitimate reason for this to happen.
+ wfDebug( __METHOD__ . ": Unmatched XML declaration start\n" );
+ return true;
+ } elseif ( substr( $contents, 0, 4 ) == "\x4C\x6F\xA7\x94" ) {
+ // EBCDIC encoded XML
+ wfDebug( __METHOD__ . ": EBCDIC Encoded XML\n" );
+ return true;
+ }
+
+ // It's possible the file is encoded with multi-byte encoding, so re-encode attempt to
+ // detect the encoding in case is specifies an encoding not whitelisted in self::$safeXmlEncodings
+ $attemptEncodings = array( 'UTF-16', 'UTF-16BE', 'UTF-32', 'UTF-32BE' );
+ foreach ( $attemptEncodings as $encoding ) {
+ wfSuppressWarnings();
+ $str = iconv( $encoding, 'UTF-8', $contents );
+ wfRestoreWarnings();
+ if ( $str != '' && preg_match( "!<\?xml\b(.*?)\?>!si", $str, $matches ) ) {
+ if ( preg_match( $encodingRegex, $matches[1], $encMatch )
+ && !in_array( strtoupper( $encMatch[1] ), self::$safeXmlEncodings )
+ ) {
+ wfDebug( __METHOD__ . ": Found unsafe XML encoding '{$encMatch[1]}'\n" );
+ return true;
+ }
+ } elseif ( $str != '' && preg_match( "!<\?xml\b!si", $str ) ) {
+ // Start of XML declaration without an end in the first $wgSVGMetadataCutoff
+ // bytes. There shouldn't be a legitimate reason for this to happen.
+ wfDebug( __METHOD__ . ": Unmatched XML declaration start\n" );
+ return true;
+ }
+ }
+
+ return false;
+ }
+
/**
* @param $filename string
* @return bool
dépôts / lhc / web / wiklou.git / blobdiff