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;
self::WINDOWS_NONASCII_FILENAME => 'windows-nonascii-filename',
self::FILENAME_TOO_LONG => 'filename-toolong',
);
- if( isset( $code_to_status[$error] ) ) {
+ if ( isset( $code_to_status[$error] ) ) {
return $code_to_status[$error];
}
public static function createFromRequest( &$request, $type = null ) {
$type = $type ? $type : $request->getVal( 'wpSourceType', 'File' );
- if( !$type ) {
+ if ( !$type ) {
return null;
}
if ( is_null( $className ) ) {
$className = 'UploadFrom' . $type;
wfDebug( __METHOD__ . ": class name: $className\n" );
- if( !in_array( $type, self::$uploadHandlers ) ) {
+ if ( !in_array( $type, self::$uploadHandlers ) ) {
return null;
}
}
// Check whether this upload class is enabled
- if( !call_user_func( array( $className, 'isEnabled' ) ) ) {
+ if ( !call_user_func( array( $className, 'isEnabled' ) ) ) {
return null;
}
// Check whether the request is valid
- if( !call_user_func( array( $className, 'isValidRequest' ), $request ) ) {
+ if ( !call_user_func( array( $className, 'isValidRequest' ), $request ) ) {
return null;
}
* @since 1.18
* @return string
*/
- public function getSourceType() { return null; }
+ public function getSourceType() {
+ return null;
+ }
/**
* Initialize the path information
/**
* If there was no filename or a zero size given, give up quick.
*/
- if( $this->isEmptyFile() ) {
+ if ( $this->isEmptyFile() ) {
wfProfileOut( __METHOD__ );
return array( 'status' => self::EMPTY_FILE );
}
* Honor $wgMaxUploadSize
*/
$maxSize = self::getMaxUploadSize( $this->getSourceType() );
- if( $this->mFileSize > $maxSize ) {
+ if ( $this->mFileSize > $maxSize ) {
wfProfileOut( __METHOD__ );
return array(
'status' => self::FILE_TOO_LARGE,
* probably not accept it.
*/
$verification = $this->verifyFile();
- if( $verification !== true ) {
+ if ( $verification !== true ) {
wfProfileOut( __METHOD__ );
return array(
'status' => self::VERIFICATION_ERROR,
* Make sure this file can be created
*/
$result = $this->validateName();
- if( $result !== true ) {
+ if ( $result !== true ) {
wfProfileOut( __METHOD__ );
return $result;
}
$error = '';
- if( !wfRunHooks( 'UploadVerification',
+ if ( !wfRunHooks( 'UploadVerification',
array( $this->mDestName, $this->mTempPath, &$error ) ) )
{
wfProfileOut( __METHOD__ );
* @return mixed true if valid, otherwise and array with 'status'
* and other keys
**/
- protected function validateName() {
+ public function validateName() {
$nt = $this->getTitle();
- if( is_null( $nt ) ) {
+ if ( is_null( $nt ) ) {
$result = array( 'status' => $this->mTitleError );
- if( $this->mTitleError == self::ILLEGAL_FILENAME ) {
+ if ( $this->mTitleError == self::ILLEGAL_FILENAME ) {
$result['filtered'] = $this->mFilteredName;
}
if ( $this->mTitleError == self::FILETYPE_BADTYPE ) {
# check for htmlish code and javascript
if ( !$wgDisableUploadScriptChecks ) {
- if( self::detectScript( $this->mTempPath, $mime, $this->mFinalExtension ) ) {
+ if ( self::detectScript( $this->mTempPath, $mime, $this->mFinalExtension ) ) {
wfProfileOut( __METHOD__ );
return array( 'uploadscripted' );
}
- if( $this->mFinalExtension == 'svg' || $mime == 'image/svg+xml' ) {
- if( $this->detectScriptInSvg( $this->mTempPath ) ) {
+ if ( $this->mFinalExtension == 'svg' || $mime == 'image/svg+xml' ) {
+ if ( $this->detectScriptInSvg( $this->mTempPath ) ) {
wfProfileOut( __METHOD__ );
return array( 'uploadscripted' );
}
* to modify it by uploading a new revision.
*/
$nt = $this->getTitle();
- if( is_null( $nt ) ) {
+ if ( is_null( $nt ) ) {
return true;
}
$permErrors = $nt->getUserPermissionsErrors( 'edit', $user );
} else {
$permErrorsCreate = array();
}
- if( $permErrors || $permErrorsUpload || $permErrorsCreate ) {
+ if ( $permErrors || $permErrorsUpload || $permErrorsCreate ) {
$permErrors = array_merge( $permErrors, wfArrayDiff2( $permErrorsUpload, $permErrors ) );
$permErrors = array_merge( $permErrors, wfArrayDiff2( $permErrorsCreate, $permErrors ) );
return $permErrors;
$comparableName = str_replace( ' ', '_', $this->mDesiredDestName );
$comparableName = Title::capitalize( $comparableName, NS_FILE );
- if( $this->mDesiredDestName != $filename && $comparableName != $filename ) {
+ if ( $this->mDesiredDestName != $filename && $comparableName != $filename ) {
$warnings['badfilename'] = $filename;
}
}
$exists = self::getExistsWarning( $localFile );
- if( $exists !== false ) {
+ if ( $exists !== false ) {
$warnings['exists'] = $exists;
}
$title = $this->getTitle();
// Remove all matches against self
foreach ( $dupes as $key => $dupe ) {
- if( $title->equals( $dupe->getTitle() ) ) {
+ if ( $title->equals( $dupe->getTitle() ) ) {
unset( $dupes[$key] );
}
}
- if( $dupes ) {
+ if ( $dupes ) {
$warnings['duplicate'] = $dupes;
}
$user
);
- if( $status->isGood() ) {
+ if ( $status->isGood() ) {
if ( $watch ) {
$user->addWatch( $this->getLocalFile()->getTitle() );
}
$this->mFilteredName = wfStripIllegalFilenameChars( $this->mFilteredName );
/* Normalize to title form before we do any further processing */
$nt = Title::makeTitleSafe( NS_FILE, $this->mFilteredName );
- if( is_null( $nt ) ) {
+ if ( is_null( $nt ) ) {
$this->mTitleError = self::ILLEGAL_FILENAME;
return $this->mTitle = null;
}
*/
list( $partname, $ext ) = $this->splitExtensions( $this->mFilteredName );
- if( count( $ext ) ) {
+ if ( count( $ext ) ) {
$this->mFinalExtension = trim( $ext[count( $ext ) - 1] );
} else {
$this->mFinalExtension = '';
# If there was more than one "extension", reassemble the base
# filename to prevent bogus complaints about length
- if( count( $ext ) > 1 ) {
- for( $i = 0; $i < count( $ext ) - 1; $i++ ) {
+ if ( count( $ext ) > 1 ) {
+ for ( $i = 0; $i < count( $ext ) - 1; $i++ ) {
$partname .= '.' . $ext[$i];
}
}
- if( strlen( $partname ) < 1 ) {
+ if ( strlen( $partname ) < 1 ) {
$this->mTitleError = self::MIN_LENGTH_PARTNAME;
return $this->mTitle = null;
}
* @return LocalFile|null
*/
public function getLocalFile() {
- if( is_null( $this->mLocalFile ) ) {
+ if ( is_null( $this->mLocalFile ) ) {
$nt = $this->getTitle();
$this->mLocalFile = is_null( $nt ) ? null : wfLocalFile( $nt );
}
public static function verifyExtension( $mime, $extension ) {
$magic = MimeMagic::singleton();
- if ( !$mime || $mime == 'unknown' || $mime == 'unknown/unknown' )
+ if ( !$mime || $mime == 'unknown' || $mime == 'unknown/unknown' ) {
if ( !$magic->isRecognizableExtension( $extension ) ) {
wfDebug( __METHOD__ . ": passing file with unknown detected mime type; " .
"unrecognized extension '$extension', can't verify\n" );
return true;
} else {
- wfDebug( __METHOD__ . ": rejecting file with unknown detected mime type; ".
+ wfDebug( __METHOD__ . ": rejecting file with unknown detected mime type; " .
"recognized extension '$extension', so probably invalid file\n" );
return false;
}
+ }
$match = $magic->isMatchingExtension( $extension, $mime );
if ( $match === null ) {
wfDebug( __METHOD__ . ": no file extension known for mime type $mime, passing file\n" );
return true;
- } elseif( $match === true ) {
+ } elseif ( $match === true ) {
wfDebug( __METHOD__ . ": mime type $mime matches extension $extension, passing file\n" );
#TODO: if it's a bitmap, make sure PHP or ImageMagic resp. can handle it!
# ugly hack: for text files, always look at the entire file.
# For binary field, just check the first K.
- if( strpos( $mime, 'text/' ) === 0 ) {
+ if ( strpos( $mime, 'text/' ) === 0 ) {
$chunk = file_get_contents( $file );
} else {
$fp = fopen( $file, 'rb' );
$chunk = strtolower( $chunk );
- if( !$chunk ) {
+ if ( !$chunk ) {
wfProfileOut( __METHOD__ );
return false;
}
# decode from UTF-16 if needed (could be used for obfuscation).
- if( substr( $chunk, 0, 2 ) == "\xfe\xff" ) {
+ if ( substr( $chunk, 0, 2 ) == "\xfe\xff" ) {
$enc = 'UTF-16BE';
- } elseif( substr( $chunk, 0, 2 ) == "\xff\xfe" ) {
+ } elseif ( substr( $chunk, 0, 2 ) == "\xff\xfe" ) {
$enc = 'UTF-16LE';
} else {
$enc = null;
}
- if( $enc ) {
+ if ( $enc ) {
$chunk = iconv( $enc, "ASCII//IGNORE", $chunk );
}
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( $file ) ) {
+ wfProfileOut( __METHOD__ );
+ return true;
+ }
+ }
+
/**
* Internet Explorer for Windows performs some really stupid file type
* autodetection which can cause it to interpret valid image files as HTML
'<table'
);
- if( !$wgAllowTitlesInSVG && $extension !== 'svg' && $mime !== 'image/svg' ) {
+ if ( !$wgAllowTitlesInSVG && $extension !== 'svg' && $mime !== 'image/svg' ) {
$tags[] = '<title';
}
- foreach( $tags as $tag ) {
- if( false !== strpos( $chunk, $tag ) ) {
+ foreach ( $tags as $tag ) {
+ if ( false !== strpos( $chunk, $tag ) ) {
wfDebug( __METHOD__ . ": found something that may make it be mistaken for html: $tag\n" );
wfProfileOut( __METHOD__ );
return true;
$chunk = Sanitizer::decodeCharReferences( $chunk );
# look for script-types
- if( preg_match( '!type\s*=\s*[\'"]?\s*(?:\w*/)?(?:ecma|java)!sim', $chunk ) ) {
+ if ( preg_match( '!type\s*=\s*[\'"]?\s*(?:\w*/)?(?:ecma|java)!sim', $chunk ) ) {
wfDebug( __METHOD__ . ": found script types\n" );
wfProfileOut( __METHOD__ );
return true;
}
# look for html-style script-urls
- if( preg_match( '!(?:href|src|data)\s*=\s*[\'"]?\s*(?:ecma|java)script:!sim', $chunk ) ) {
+ if ( preg_match( '!(?:href|src|data)\s*=\s*[\'"]?\s*(?:ecma|java)script:!sim', $chunk ) ) {
wfDebug( __METHOD__ . ": found html-style script urls\n" );
wfProfileOut( __METHOD__ );
return true;
}
# look for css-style script-urls
- if( preg_match( '!url\s*\(\s*[\'"]?\s*(?:ecma|java)script:!sim', $chunk ) ) {
+ if ( preg_match( '!url\s*\(\s*[\'"]?\s*(?:ecma|java)script:!sim', $chunk ) ) {
wfDebug( __METHOD__ . ": found css-style script urls\n" );
wfProfileOut( __METHOD__ );
return true;
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
/*
* check for elements that can contain javascript
*/
- if( $strippedElement == 'script' ) {
+ if ( $strippedElement == 'script' ) {
wfDebug( __METHOD__ . ": Found script element '$element' in uploaded file.\n" );
return true;
}
# e.g., <svg xmlns="http://www.w3.org/2000/svg"> <handler xmlns:ev="http://www.w3.org/2001/xml-events" ev:event="load">alert(1)</handler> </svg>
- if( $strippedElement == 'handler' ) {
+ if ( $strippedElement == 'handler' ) {
wfDebug( __METHOD__ . ": Found scriptable element '$element' in uploaded file.\n" );
return true;
}
# SVG reported in Feb '12 that used xml:stylesheet to generate javascript block
- if( $strippedElement == 'stylesheet' ) {
+ if ( $strippedElement == 'stylesheet' ) {
wfDebug( __METHOD__ . ": Found scriptable element '$element' in uploaded file.\n" );
return true;
}
- foreach( $attribs as $attrib => $value ) {
+ foreach ( $attribs as $attrib => $value ) {
$stripped = $this->stripXmlNamespace( $attrib );
$value = strtolower( $value );
- if( substr( $stripped, 0, 2 ) == 'on' ) {
+ if ( substr( $stripped, 0, 2 ) == 'on' ) {
wfDebug( __METHOD__ . ": Found event-handler attribute '$attrib'='$value' in uploaded file.\n" );
return true;
}
# href with javascript target
- if( $stripped == 'href' && strpos( strtolower( $value ), 'javascript:' ) !== false ) {
+ if ( $stripped == 'href' && strpos( strtolower( $value ), 'javascript:' ) !== false ) {
wfDebug( __METHOD__ . ": Found script in href attribute '$attrib'='$value' in uploaded file.\n" );
return true;
}
# href with embedded svg as target
- if( $stripped == 'href' && preg_match( '!data:[^,]*image/svg[^,]*,!sim', $value ) ) {
+ if ( $stripped == 'href' && preg_match( '!data:[^,]*image/svg[^,]*,!sim', $value ) ) {
wfDebug( __METHOD__ . ": Found href to embedded svg \"<$strippedElement '$attrib'='$value'...\" in uploaded file.\n" );
return true;
}
# href with embedded (text/xml) svg as target
- if( $stripped == 'href' && preg_match( '!data:[^,]*text/xml[^,]*,!sim', $value ) ) {
+ if ( $stripped == 'href' && preg_match( '!data:[^,]*text/xml[^,]*,!sim', $value ) ) {
wfDebug( __METHOD__ . ": Found href to embedded svg \"<$strippedElement '$attrib'='$value'...\" in uploaded file.\n" );
return true;
}
# use set/animate to add event-handler attribute to parent
- if( ( $strippedElement == 'set' || $strippedElement == 'animate' ) && $stripped == 'attributename' && substr( $value, 0, 2 ) == 'on' ) {
+ if ( ( $strippedElement == 'set' || $strippedElement == 'animate' ) && $stripped == 'attributename' && substr( $value, 0, 2 ) == 'on' ) {
wfDebug( __METHOD__ . ": Found svg setting event-handler attribute with \"<$strippedElement $stripped='$value'...\" in uploaded file.\n" );
return true;
}
# use set to add href attribute to parent element
- if( $strippedElement == 'set' && $stripped == 'attributename' && strpos( $value, 'href' ) !== false ) {
+ if ( $strippedElement == 'set' && $stripped == 'attributename' && strpos( $value, 'href' ) !== false ) {
wfDebug( __METHOD__ . ": Found svg setting href attribute '$value' in uploaded file.\n" );
return true;
}
# use set to add a remote / data / script target to an element
- if( $strippedElement == 'set' && $stripped == 'to' && preg_match( '!(http|https|data|script):!sim', $value ) ) {
+ if ( $strippedElement == 'set' && $stripped == 'to' && preg_match( '!(http|https|data|script):!sim', $value ) ) {
wfDebug( __METHOD__ . ": Found svg setting attribute to '$value' in uploaded file.\n" );
return true;
}
# use handler attribute with remote / data / script
- if( $stripped == 'handler' && preg_match( '!(http|https|data|script):!sim', $value ) ) {
+ if ( $stripped == 'handler' && preg_match( '!(http|https|data|script):!sim', $value ) ) {
wfDebug( __METHOD__ . ": Found svg setting handler with remote/data/script '$attrib'='$value' in uploaded file.\n" );
return true;
}
# use CSS styles to bring in remote code
# catch url("http:..., url('http:..., url(http:..., but not url("#..., url('#..., url(#....
- if( $stripped == 'style' && preg_match_all( '!((?:font|clip-path|fill|filter|marker|marker-end|marker-mid|marker-start|mask|stroke)\s*:\s*url\s*\(\s*["\']?\s*[^#]+.*?\))!sim', $value, $matches ) ) {
+ if ( $stripped == 'style' && preg_match_all( '!((?:font|clip-path|fill|filter|marker|marker-end|marker-mid|marker-start|mask|stroke)\s*:\s*url\s*\(\s*["\']?\s*[^#]+.*?\))!sim', $value, $matches ) ) {
foreach ( $matches[1] as $match ) {
if ( !preg_match( '!(?:font|clip-path|fill|filter|marker|marker-end|marker-mid|marker-start|mask|stroke)\s*:\s*url\s*\(\s*(#|\'#|"#)!sim', $match ) ) {
wfDebug( __METHOD__ . ": Found svg setting a style with remote url '$attrib'='$value' in uploaded file.\n" );
}
# image filters can pull in url, which could be svg that executes scripts
- if( $strippedElement == 'image' && $stripped == 'filter' && preg_match( '!url\s*\(!sim', $value ) ) {
+ if ( $strippedElement == 'image' && $stripped == 'filter' && preg_match( '!url\s*\(!sim', $value ) ) {
wfDebug( __METHOD__ . ": Found image filter with url: \"<$strippedElement $stripped='$value'...\" in uploaded file.\n" );
return true;
}
private function checkOverwrite( $user ) {
// First check whether the local file can be overwritten
$file = $this->getLocalFile();
- if( $file->exists() ) {
- if( !self::userCanReUpload( $user, $file ) ) {
+ if ( $file->exists() ) {
+ if ( !self::userCanReUpload( $user, $file ) ) {
return array( 'fileexists-forbidden', $file->getName() );
} else {
return true;
* @return Boolean
*/
public static function userCanReUpload( User $user, $img ) {
- if( $user->isAllowed( 'reupload' ) ) {
+ if ( $user->isAllowed( 'reupload' ) ) {
return true; // non-conditional
}
- if( !$user->isAllowed( 'reupload-own' ) ) {
+ if ( !$user->isAllowed( 'reupload-own' ) ) {
return false;
}
- if( is_string( $img ) ) {
+ if ( is_string( $img ) ) {
$img = wfLocalFile( $img );
}
if ( !( $img instanceof LocalFile ) ) {
* @return mixed False if the file does not exists, else an array
*/
public static function getExistsWarning( $file ) {
- if( $file->exists() ) {
+ if ( $file->exists() ) {
return array( 'warning' => 'exists', 'file' => $file );
}
- if( $file->getTitle()->getArticleID() ) {
+ if ( $file->getTitle()->getArticleID() ) {
return array( 'warning' => 'page-exists', 'file' => $file );
}
return array( 'warning' => 'was-deleted', 'file' => $file );
}
- if( strpos( $file->getName(), '.' ) == false ) {
+ if ( strpos( $file->getName(), '.' ) == false ) {
$partname = $file->getName();
$extension = '';
} else {
$nt_lc = Title::makeTitle( NS_FILE, "{$partname}.{$normalizedExtension}" );
$file_lc = wfLocalFile( $nt_lc );
- if( $file_lc->exists() ) {
+ if ( $file_lc->exists() ) {
return array(
'warning' => 'exists-normalized',
'file' => $file,
# Check for filenames like 50px- or 180px-, these are mostly thumbnails
$nt_thb = Title::newFromText( substr( $partname, strpos( $partname, '-' ) + 1 ) . '.' . $extension, NS_FILE );
$file_thb = wfLocalFile( $nt_thb );
- if( $file_thb->exists() ) {
+ if ( $file_thb->exists() ) {
return array(
'warning' => 'thumb',
'file' => $file,
}
}
- foreach( self::getFilenamePrefixBlacklist() as $prefix ) {
+ foreach ( self::getFilenamePrefixBlacklist() as $prefix ) {
if ( substr( $partname, 0, strlen( $prefix ) ) == $prefix ) {
return array(
'warning' => 'bad-prefix',
public static function getFilenamePrefixBlacklist() {
$blacklist = array();
$message = wfMessage( 'filename-prefix-blacklist' )->inContentLanguage();
- if( !$message->isDisabled() ) {
+ if ( !$message->isDisabled() ) {
$lines = explode( "\n", $message->plain() );
- foreach( $lines as $line ) {
+ foreach ( $lines as $line ) {
// Remove comment lines
$comment = substr( trim( $line ), 0, 1 );
if ( $comment == '#' || $comment == '' ) {
// Remove additional comments after a prefix
$comment = strpos( $line, '#' );
if ( $comment > 0 ) {
- $line = substr( $line, 0, $comment-1 );
+ $line = substr( $line, 0, $comment - 1 );
}
$blacklist[] = trim( $line );
}
dépôts / lhc / web / wiklou.git / blobdiff