513 lines
16 KiB
PHP
513 lines
16 KiB
PHP
<?php
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/**
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*
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* @package MediaWiki
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* @subpackage SpecialPage
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*/
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/**
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*
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*/
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require_once( 'Image.php' );
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/**
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* Entry point
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*/
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function wfSpecialUpload() {
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global $wgRequest;
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$form = new UploadForm( $wgRequest );
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$form->execute();
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}
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/**
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*
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* @package MediaWiki
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* @subpackage SpecialPage
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*/
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class UploadForm {
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/**#@+
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* @access private
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*/
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var $mUploadAffirm, $mUploadFile, $mUploadDescription, $mIgnoreWarning;
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var $mUploadSaveName, $mUploadTempName, $mUploadSize, $mUploadOldVersion;
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var $mUploadCopyStatus, $mUploadSource, $mReUpload, $mAction, $mUpload;
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var $mOname, $mSessionKey;
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/**#@- */
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/**
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* Constructor : initialise object
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* Get data POSTed through the form and assign them to the object
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* @param $request Data posted.
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*/
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function UploadForm( &$request ) {
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$this->mUploadAffirm = $request->getVal( 'wpUploadAffirm' );
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$this->mUploadFile = $request->getVal( 'wpUploadFile' );
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$this->mUploadDescription = $request->getVal( 'wpUploadDescription');
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$this->mIgnoreWarning = $request->getVal( 'wpIgnoreWarning');
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$this->mUploadSaveName = $request->getVal( 'wpUploadSaveName');
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$this->mUploadTempName = $request->getVal( 'wpUploadTempName');
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$this->mUploadTempName = $request->getVal( 'wpUploadTempName');
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$this->mUploadSize = $request->getVal( 'wpUploadSize');
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$this->mUploadOldVersion = $request->getVal( 'wpUploadOldVersion');
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$this->mUploadCopyStatus = $request->getVal( 'wpUploadCopyStatus');
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$this->mUploadSource = $request->getVal( 'wpUploadSource');
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$this->mReUpload = $request->getCheck( 'wpReUpload' );
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$this->mAction = $request->getVal( 'action' );
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$this->mUpload = $request->getCheck( 'wpUpload' );
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$this->mSessionKey = $request->getVal( 'wpSessionKey' );
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/** Generate a temporary name if we don't have one yet */
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if ( ! $this->mUploadTempName ) {
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$this->mUploadTempName = $request->getFileTempName( 'wpUploadFile' );
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}
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/** Get size of file */
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if ( ! $this->mUploadSize ) {
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$this->mUploadSize = $request->getFileSize( 'wpUploadFile' );
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}
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$this->mOname = $request->getFileName( 'wpUploadFile' );
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}
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/**
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* Start doing stuff
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* @access public
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*/
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function execute() {
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global $wgUser, $wgOut;
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global $wgDisableUploads;
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/** Show an error message if file upload is disabled */
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if ( $wgDisableUploads ) {
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$wgOut->addWikiText( wfMsg( 'uploaddisabled' ) );
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return;
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}
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/** Various rights checks */
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if ( ( $wgUser->getID() == 0 )
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OR $wgUser->isBlocked() ) {
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$wgOut->errorpage( 'uploadnologin', 'uploadnologintext' );
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return;
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}
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if ( wfReadOnly() ) {
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$wgOut->readOnlyPage();
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return;
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}
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if ( $this->mReUpload ) {
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$this->unsaveUploadedFile();
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$this->mainUploadForm( '' );
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} else if ( 'submit' == $this->mAction || $this->mUpload ) {
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$this->processUpload();
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} else {
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$this->mainUploadForm( '' );
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}
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}
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/**
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* Really do the upload
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* Checks are made in SpecialUpload::execute()
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* @access private
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*/
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function processUpload() {
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global $wgUser, $wgOut, $wgLang, $wgContLang;
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global $wgUploadDirectory;
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global $wgSavedFile, $wgUploadOldVersion;
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global $wgUseCopyrightUpload, $wgCheckCopyrightUpload;
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global $wgCheckFileExtensions, $wgStrictFileExtensions;
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global $wgFileExtensions, $wgFileBlacklist, $wgUploadSizeWarning;
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/** When using detailed copyright, if user filled field, assume he
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* confirmed the upload */
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if ( $wgUseCopyrightUpload ) {
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$this->mUploadAffirm = 1;
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if ($wgCheckCopyrightUpload &&
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(trim ( $this->mUploadCopyStatus ) == '' || trim ( $this->mUploadSource ) == '' )) {
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$this->mUploadAffirm = 0;
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}
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}
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/** User need to confirm his upload */
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if ( $this->mUploadAffirm != 1) {
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$this->mainUploadForm( WfMsg( 'noaffirmation' ) );
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return;
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}
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if ( $this->mOname != '' ) {
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$basename = strrchr( $this->mOname, '/' );
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if ( false === $basename ) { $basename = $this->mOname; }
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else ( $basename = substr( $basename, 1 ) );
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$ext = strrchr( $basename, '.' );
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if ( false === $ext ) { $ext = ''; }
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else { $ext = substr( $ext, 1 ); }
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if ( '' == $ext ) { $xl = 0; } else { $xl = strlen( $ext ) + 1; }
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$partname = substr( $basename, 0, strlen( $basename ) - $xl );
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if ( strlen( $partname ) < 3 ) {
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$this->mainUploadForm( WfMsg( 'minlength' ) );
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return;
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}
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$changed_name = false;
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$bn = preg_replace ( "/[^".Title::legalChars()."]/", '-', $basename );
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if ( 0 != strcmp( $bn, $basename ) )
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{
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$changed_name = true;
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$basename = $bn;
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}
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$nt = Title::newFromText( $basename );
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if( !$nt ) {
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return $this->uploadError( wfMsg( 'illegalfilename', htmlspecialchars( $basename ) ) );
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}
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$nt->setNamespace( Namespace::getImage() );
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$this->mUploadSaveName = $nt->getDBkey();
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/* Don't allow users to override the blacklist */
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if( $this->checkFileExtension( $ext, $wgFileBlacklist ) ||
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($wgStrictFileExtensions && !$this->checkFileExtension( $ext, $wgFileExtensions ) ) ) {
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return $this->uploadError( wfMsg( 'badfiletype', htmlspecialchars( $ext ) ) );
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}
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if( !$this->verify( $this->mUploadTempName, $ext ) ) {
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return $this->uploadError( wfMsg( 'uploadcorrupt' ) );
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}
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$this->saveUploadedFile( $this->mUploadSaveName, $this->mUploadTempName );
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if ( !$nt->userCanEdit() ) {
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return $this->uploadError( wfMsg( 'protectedpage' ) );
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}
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if ( ! $this->mIgnoreWarning ) {
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$warning = '';
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if( $changed_name || 0 != strcmp( ucfirst( $basename ), $this->mUploadSaveName ) ) {
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$warning .= '<li>'.wfMsg( 'badfilename', htmlspecialchars( $this->mUploadSaveName ) ).'</li>';
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}
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if ( $wgCheckFileExtensions ) {
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if ( ! $this->checkFileExtension( $ext, $wgFileExtensions ) ) {
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$warning .= '<li>'.wfMsg( 'badfiletype', htmlspecialchars( $ext ) ).'</li>';
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}
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}
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if ( $wgUploadSizeWarning && ( $this->mUploadSize > $wgUploadSizeWarning ) ) {
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$warning .= '<li>'.wfMsg( 'largefile' ).'</li>';
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}
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if ( $this->mUploadSize == 0 ) {
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$warning .= '<li>'.wfMsg( 'emptyfile' ).'</li>';
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}
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if( $nt->getArticleID() ) {
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$sk = $wgUser->getSkin();
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$dname = $wgContLang->getNsText( Namespace::getImage() ) .':'.$this->mUploadSaveName;
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$dlink = $sk->makeKnownLink( $dname, $dname );
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$warning .= '<li>'.wfMsg( 'fileexists', $dlink ).'</li>';
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}
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if($warning != '') return $this->uploadWarning($warning);
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}
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} elseif(!isset($this->mUploadSaveName)) {
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// no filename given even when reuploading
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return $this->uploadError('<li>'.wfMsg( 'emptyfile' ).'</li>');
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}
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if ( !is_null( $this->mUploadOldVersion ) ) {
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$wgUploadOldVersion = $this->mUploadOldVersion;
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}
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wfRecordUpload( $this->mUploadSaveName, $wgUploadOldVersion, $this->mUploadSize,
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$this->mUploadDescription, $this->mUploadCopyStatus, $this->mUploadSource );
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$sk = $wgUser->getSkin();
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$ilink = $sk->makeMediaLink( $this->mUploadSaveName, Image::wfImageUrl( $this->mUploadSaveName ) );
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$dname = $wgContLang->getNsText( Namespace::getImage() ) . ':'.$this->mUploadSaveName;
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$dlink = $sk->makeKnownLink( $dname, $dname );
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$wgOut->addHTML( '<h2>' . wfMsg( 'successfulupload' ) . "</h2>\n" );
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$text = wfMsg( 'fileuploaded', $ilink, $dlink );
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$wgOut->addHTML( '<p>'.$text."\n" );
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$wgOut->returnToMain( false );
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}
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function checkFileExtension( $ext, $list ) {
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return in_array( strtolower( $ext ), $list );
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}
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function saveUploadedFile( $saveName, $tempName ) {
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global $wgSavedFile, $wgUploadOldVersion;
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global $wgUploadDirectory, $wgOut;
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$dest = wfImageDir( $saveName );
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$archive = wfImageArchiveDir( $saveName );
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$wgSavedFile = "{$dest}/{$saveName}";
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if ( is_file( $wgSavedFile ) ) {
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$wgUploadOldVersion = gmdate( 'YmdHis' ) . "!{$saveName}";
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if ( ! rename( $wgSavedFile, "${archive}/{$wgUploadOldVersion}" ) ) {
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$wgOut->fileRenameError( $wgSavedFile,
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"${archive}/{$wgUploadOldVersion}" );
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return;
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}
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} else {
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$wgUploadOldVersion = '';
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}
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if ( ! move_uploaded_file( $tempName, $wgSavedFile ) ) {
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$wgOut->fileCopyError( $tempName, $wgSavedFile );
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}
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chmod( $wgSavedFile, 0644 );
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}
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function unsaveUploadedFile() {
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global $wgUploadDirectory, $wgOut, $wgRequest;
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$wgSavedFile = $_SESSION['wsUploadFiles'][$this->mSessionKey];
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$wgUploadOldVersion = $this->mUploadOldVersion;
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if ( ! @unlink( $wgSavedFile ) ) {
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$wgOut->fileDeleteError( $wgSavedFile );
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return;
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}
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if ( '' != $wgUploadOldVersion ) {
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$hash = md5( substr( $wgUploadOldVersion, 15 ) );
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$archive = $wgUploadDirectory.'/archive/' . $hash{0} .
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'/' . substr( $hash, 0, 2 );
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if ( ! rename( "{$archive}/{$wgUploadOldVersion}", $wgSavedFile ) ) {
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$wgOut->fileRenameError( "{$archive}/{$wgUploadOldVersion}",
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$wgSavedFile );
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}
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}
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}
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function uploadError( $error ) {
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global $wgOut;
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$sub = wfMsg( 'uploadwarning' );
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$wgOut->addHTML( "<h2>{$sub}</h2>\n" );
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$wgOut->addHTML( "<h4 style='error'>{$error}</h4>\n" );
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}
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function uploadWarning( $warning ) {
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global $wgOut, $wgUser, $wgLang, $wgUploadDirectory, $wgRequest;
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global $wgSavedFile, $wgUploadOldVersion;
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global $wgUseCopyrightUpload;
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# wgSavedFile is stored in the session not the form, for security
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$this->mSessionKey = mt_rand( 0, 0x7fffffff );
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$_SESSION['wsUploadFiles'][$this->mSessionKey] = $wgSavedFile;
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$sub = wfMsg( 'uploadwarning' );
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$wgOut->addHTML( "<h2>{$sub}</h2>\n" );
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$wgOut->addHTML( "<ul class='warning'>{$warning}</ul><br/>\n" );
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$save = wfMsg( 'savefile' );
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$reupload = wfMsg( 'reupload' );
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$iw = wfMsg( 'ignorewarning' );
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$reup = wfMsg( 'reuploaddesc' );
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$titleObj = Title::makeTitle( NS_SPECIAL, 'Upload' );
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$action = $titleObj->escapeLocalURL( 'action=submit' );
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if ( $wgUseCopyrightUpload )
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{
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$copyright = "
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<input type='hidden' name=\"wpUploadCopyStatus\" value=\"" . htmlspecialchars( $this->mUploadCopyStatus ) . "\" />
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<input type='hidden' name=\"wpUploadSource\" value=\"" . htmlspecialchars( $this->mUploadSource ) . "\" />
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";
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} else {
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$copyright = "";
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}
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$wgOut->addHTML( "
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<form id=\"uploadwarning\" method=\"post\" enctype=\"multipart/form-data\"
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action=\"{$action}\">
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<input type=hidden name=\"wpUploadAffirm\" value=\"1\" />
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<input type=hidden name=\"wpIgnoreWarning\" value=\"1\" />
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<input type=hidden name=\"wpUploadDescription\" value=\"" . htmlspecialchars( $this->mUploadDescription ) . "\" />
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{$copyright}
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<input type=hidden name=\"wpUploadSaveName\" value=\"" . htmlspecialchars( $this->mUploadSaveName ) . "\" />
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<input type=hidden name=\"wpUploadTempName\" value=\"" . htmlspecialchars( $this->mUploadTempName ) . "\" />
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<input type=hidden name=\"wpUploadSize\" value=\"" . htmlspecialchars( $this->mUploadSize ) . "\" />
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<input type=hidden name=\"wpSessionKey\" value=\"" . htmlspecialchars( $this->mSessionKey ) . "\" />
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<input type=hidden name=\"wpUploadOldVersion\" value=\"" . htmlspecialchars( $wgUploadOldVersion) . "\" />
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<table border='0'><tr>
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<tr><td align='right'>
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<input tabindex='2' type='submit' name=\"wpUpload\" value=\"{$save}\" />
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</td><td align='left'>{$iw}</td></tr>
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<tr><td align='right'>
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<input tabindex='2' type='submit' name=\"wpReUpload\" value=\"{$reupload}\" />
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</td><td align='left'>{$reup}</td></tr></table></form>\n" );
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}
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function mainUploadForm( $msg ) {
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global $wgOut, $wgUser, $wgLang, $wgUploadDirectory, $wgRequest;
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global $wgUseCopyrightUpload;
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if ( '' != $msg ) {
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$sub = wfMsg( 'uploaderror' );
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$wgOut->addHTML( "<h2>{$sub}</h2>\n" .
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"<h4 style='error'>{$msg}</h4>\n" );
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} else {
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$sub = wfMsg( 'uploadfile' );
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$wgOut->addHTML( "<h2>{$sub}</h2>\n" );
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}
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$wgOut->addWikiText( wfMsg( 'uploadtext' ) );
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$sk = $wgUser->getSkin();
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$fn = wfMsg( 'filename' );
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$fd = wfMsg( 'filedesc' );
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$ulb = wfMsg( 'uploadbtn' );
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$clink = $sk->makeKnownLink( wfMsgForContent( 'copyrightpage' ),
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wfMsg( 'copyrightpagename' ) );
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$ca = wfMsg( 'affirmation', $clink );
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$iw = wfMsg( 'ignorewarning' );
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$titleObj = Title::makeTitle( NS_SPECIAL, 'Upload' );
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$action = $titleObj->escapeLocalURL();
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$source = "
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<td align='right'>
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<input tabindex='3' type='checkbox' name=\"wpUploadAffirm\" value=\"1\" id=\"wpUploadAffirm\" />
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</td><td align='left'><label for=\"wpUploadAffirm\">{$ca}</label></td>
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" ;
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if ( $wgUseCopyrightUpload )
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{
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$source = "
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<td align='right' nowrap='nowrap'>" . wfMsg ( 'filestatus' ) . ":</td>
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<td><input tabindex='3' type='text' name=\"wpUploadCopyStatus\" value=\"" .
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htmlspecialchars($this->mUploadCopyStatus). "\" size='40' /></td>
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</tr><tr>
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<td align='right'>". wfMsg ( 'filesource' ) . ":</td>
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<td><input tabindex='4' type='text' name=\"wpUploadSource\" value=\"" .
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htmlspecialchars($this->mUploadSource). "\" size='40' /></td>
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" ;
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}
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$wgOut->addHTML( "
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<form id=\"upload\" method=\"post\" enctype=\"multipart/form-data\"
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action=\"{$action}\">
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<table border='0'><tr>
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<td align='right'>{$fn}:</td><td align='left'>
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<input tabindex='1' type='file' name=\"wpUploadFile\" value=\""
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. htmlspecialchars( $this->mUploadFile ) . "\" size='40' />
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</td></tr><tr>
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<td align='right'>{$fd}:</td><td align='left'>
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<input tabindex='2' type='text' name=\"wpUploadDescription\" value=\""
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. htmlspecialchars( $this->mUploadDescription ) . "\" size='40' />
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</td></tr><tr>
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{$source}
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</tr>
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<tr><td></td><td align='left'>
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<input tabindex='5' type='submit' name=\"wpUpload\" value=\"{$ulb}\" />
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</td></tr></table></form>\n" );
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}
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/**
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* Returns false if the file is of a known type but can't be recognized,
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* indicating a corrupt file.
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* Returns true otherwise; unknown file types are not checked if given
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* with an unrecognized extension.
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*
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* @param string $tmpfile Pathname to the temporary upload file
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* @param string $extension The filename extension that the file is to be served with
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* @return bool
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*/
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function verify( $tmpfile, $extension ) {
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if( $this->triggersIEbug( $tmpfile ) ) {
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return false;
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}
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$fname = 'SpecialUpload::verify';
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$mergeExtensions = array(
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'jpg' => 'jpeg',
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'tif' => 'tiff' );
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$extensionTypes = array(
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# See http://www.php.net/getimagesize
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1 => 'gif',
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2 => 'jpeg',
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3 => 'png',
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4 => 'swf',
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5 => 'psd',
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6 => 'bmp',
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7 => 'tiff',
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8 => 'tiff',
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9 => 'jpc',
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10 => 'jp2',
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11 => 'jpx',
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12 => 'jb2',
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13 => 'swc',
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14 => 'iff',
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15 => 'wbmp',
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16 => 'xbm' );
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$extension = strtolower( $extension );
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if( isset( $mergeExtensions[$extension] ) ) {
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$extension = $mergeExtensions[$extension];
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}
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wfDebug( "$fname: Testing file '$tmpfile' with given extension '$extension'\n" );
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if( !in_array( $extension, $extensionTypes ) ) {
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# Not a recognized image type. We don't know how to verify these.
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# They're allowed by policy or they wouldn't get this far, so we'll
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# let them slide for now.
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wfDebug( "$fname: Unknown extension; passing.\n" );
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return true;
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}
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$data = @getimagesize( $tmpfile );
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if( false === $data ) {
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# Didn't recognize the image type.
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# Either the image is corrupt or someone's slipping us some
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# bogus data such as HTML+JavaScript trying to take advantage
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# of an Internet Explorer security flaw.
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|
wfDebug( "$fname: getimagesize() doesn't recognize the file; rejecting.\n" );
|
|
return false;
|
|
}
|
|
|
|
$imageType = $data[2];
|
|
if( !isset( $extensionTypes[$imageType] ) ) {
|
|
# Now we're kind of confused. Perhaps new image types added
|
|
# to PHP's support that we don't know about.
|
|
# We'll let these slide for now.
|
|
wfDebug( "$fname: getimagesize() knows the file, but we don't recognize the type; passing.\n" );
|
|
return true;
|
|
}
|
|
|
|
$ext = strtolower( $extension );
|
|
if( $extension != $extensionTypes[$imageType] ) {
|
|
# The given filename extension doesn't match the
|
|
# file type. Probably just a mistake, but it's a stupid
|
|
# one and we shouldn't let it pass. KILL THEM!
|
|
wfDebug( "$fname: file extension does not match recognized type; rejecting.\n" );
|
|
return false;
|
|
}
|
|
|
|
wfDebug( "$fname: all clear; passing.\n" );
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* Internet Explorer for Windows performs some really stupid file type
|
|
* autodetection which can cause it to interpret valid image files as HTML
|
|
* and potentially execute JavaScript, creating a cross-site scripting
|
|
* attack vectors.
|
|
*
|
|
* Returns true if IE is likely to mistake the given file for HTML.
|
|
*
|
|
* @param string $filename
|
|
* @return bool
|
|
*/
|
|
function triggersIEbug( $filename ) {
|
|
$file = fopen( $filename, 'rb' );
|
|
$chunk = strtolower( fread( $file, 200 ) );
|
|
fclose( $file );
|
|
|
|
$tags = array( '<html', '<head', '<body', '<script' );
|
|
foreach( $tags as $tag ) {
|
|
if( false !== strpos( $chunk, $tag ) ) {
|
|
return true;
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
}
|
|
?>
|