X-Git-Url: https://git.heureux-cyclage.org/?a=blobdiff_plain;f=img_auth.php;h=d7125897c5f9941e629bb361aa961067ec3888ac;hb=e26b5665b5e614d5c6733ac83835cb470e20021b;hp=f38d40033836fc4adf6ee448922adfb909240a0d;hpb=0655c03974a7dfa6636e82d0b134ccfa1d3b0db2;p=lhc%2Fweb%2Fwiklou.git

diff --git a/img_auth.php b/img_auth.php
index f38d400338..d7125897c5 100644
--- a/img_auth.php
+++ b/img_auth.php
@@ -1,153 +1,171 @@
 <?php
+/**
+ * Image authorisation script
+ *
+ * To use this, see http://www.mediawiki.org/wiki/Manual:Image_Authorization
+ *
+ * - Set $wgUploadDirectory to a non-public directory (not web accessible)
+ * - Set $wgUploadPath to point to this file
+ *
+ * Optional Parameters
+ *
+ * - Set $wgImgAuthDetails = true if you want the reason the access was denied messages to
+ *       be displayed instead of just the 403 error (doesn't work on IE anyway),
+ *       otherwise it will only appear in error logs
+ * - Set $wgImgAuthPublicTest false if you don't want to just check and see if all are public
+ *       must be set to false if using specific restrictions such as LockDown or NSFileRepo
+ *
+ *  For security reasons, you usually don't want your user to know *why* access was denied,
+ *  just that it was. If you want to change this, you can set $wgImgAuthDetails to 'true'
+ *  in localsettings.php and it will give the user the reason why access was denied.
+ *
+ * Your server needs to support PATH_INFO; CGI-based configurations usually don't.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ * http://www.gnu.org/copyleft/gpl.html
+ *
+ * @file
+ */
 
-# Image download authorisation script
-define( "MEDIAWIKI", true );
-require_once( "./LocalSettings.php" );
-require_once( "includes/Setup.php" );
-if ( $wgWhitelistRead && !$wgUser->getID() ) {
-	header( "HTTP/1.0 403 Forbidden" );
-	exit;
+define( 'MW_NO_OUTPUT_COMPRESSION', 1 );
+if ( isset( $_SERVER['MW_COMPILED'] ) ) {
+	require ( 'core/includes/WebStart.php' );
+} else {
+	require ( dirname( __FILE__ ) . '/includes/WebStart.php' );
 }
+wfProfileIn( 'img_auth.php' );
 
-# Check if the filename is in the correct directory
-$filename = realpath( $wgUploadDirectory . $_SERVER['PATH_INFO'] );
-$realUploadDirectory = realpath( $wgUploadDirectory );
-if ( substr( $filename, 0, strlen( $realUploadDirectory ) ) != $realUploadDirectory ) {
-	header( "HTTP/1.0 403 Forbidden" );
-	exit;
-}
+# Set action base paths so that WebRequest::getPathInfo()
+# recognizes the "X" as the 'title' in ../image_auth/X urls.
+$wgArticlePath = false; # Don't let a "/*" article path clober our action path
+$wgActionPaths = array( "$wgUploadPath/" );
 
-# Write file
-$type = wfGetType( $filename );
-if ( $type ) {
-	header("Content-type: $type");
-}
+wfImageAuthMain();
+wfLogProfilingData();
 
-readfile( $filename );
-
-function wfGetType( $filename ) {
-	# There's probably a better way to do this
-	$types = "application/andrew-inset ez
-application/mac-binhex40 hqx
-application/mac-compactpro cpt
-application/mathml+xml mathml
-application/msword doc
-application/octet-stream bin dms lha lzh exe class so dll
-application/oda oda
-application/ogg ogg
-application/pdf pdf
-application/postscript ai eps ps
-application/rdf+xml rdf
-application/smil smi smil
-application/srgs gram
-application/srgs+xml grxml
-application/vnd.mif mif
-application/vnd.ms-excel xls
-application/vnd.ms-powerpoint ppt
-application/vnd.wap.wbxml wbxml
-application/vnd.wap.wmlc wmlc
-application/vnd.wap.wmlscriptc wmlsc
-application/voicexml+xml vxml
-application/x-bcpio bcpio
-application/x-cdlink vcd
-application/x-chess-pgn pgn
-application/x-cpio cpio
-application/x-csh csh
-application/x-director dcr dir dxr
-application/x-dvi dvi
-application/x-futuresplash spl
-application/x-gtar gtar
-application/x-hdf hdf
-application/x-javascript js
-application/x-koan skp skd skt skm
-application/x-latex latex
-application/x-netcdf nc cdf
-application/x-sh sh
-application/x-shar shar
-application/x-shockwave-flash swf
-application/x-stuffit sit
-application/x-sv4cpio sv4cpio
-application/x-sv4crc sv4crc
-application/x-tar tar
-application/x-tcl tcl
-application/x-tex tex
-application/x-texinfo texinfo texi
-application/x-troff t tr roff
-application/x-troff-man man
-application/x-troff-me me
-application/x-troff-ms ms
-application/x-ustar ustar
-application/x-wais-source src
-application/xhtml+xml xhtml xht
-application/xslt+xml xslt
-application/xml xml xsl
-application/xml-dtd dtd
-application/zip zip
-audio/basic au snd
-audio/midi mid midi kar
-audio/mpeg mpga mp2 mp3
-audio/x-aiff aif aiff aifc
-audio/x-mpegurl m3u
-audio/x-pn-realaudio ram rm
-audio/x-pn-realaudio-plugin rpm
-audio/x-realaudio ra
-audio/x-wav wav
-chemical/x-pdb pdb
-chemical/x-xyz xyz
-image/bmp bmp
-image/cgm cgm
-image/gif gif
-image/ief ief
-image/jpeg jpeg jpg jpe
-image/png png
-image/svg+xml svg
-image/tiff tiff tif
-image/vnd.djvu djvu djv
-image/vnd.wap.wbmp wbmp
-image/x-cmu-raster ras
-image/x-icon ico
-image/x-portable-anymap pnm
-image/x-portable-bitmap pbm
-image/x-portable-graymap pgm
-image/x-portable-pixmap ppm
-image/x-rgb rgb
-image/x-xbitmap xbm
-image/x-xpixmap xpm
-image/x-xwindowdump xwd
-model/iges igs iges
-model/mesh msh mesh silo
-model/vrml wrl vrml
-text/calendar ics ifb
-text/css css
-text/html html htm
-text/plain asc txt
-text/richtext rtx
-text/rtf rtf
-text/sgml sgml sgm
-text/tab-separated-values tsv
-text/vnd.wap.wml wml
-text/vnd.wap.wmlscript wmls
-text/x-setext etx
-video/mpeg mpeg mpg mpe
-video/quicktime qt mov
-video/vnd.mpegurl mxu
-video/x-msvideo avi
-video/x-sgi-movie movie
-x-conference/x-cooltalk ice";
-
-	$types = explode( "\n", $types );
-	if ( !preg_match( "/\.(.*?)$/", $filename, $matches ) ) {
-		return false;
+function wfImageAuthMain() {
+	global $wgImgAuthPublicTest, $wgRequest;
+
+	// See if this is a public Wiki (no protections).
+	if ( $wgImgAuthPublicTest
+		&& in_array( 'read', User::getGroupPermissions( array( '*' ) ), true ) )
+	{
+		// This is a public wiki, so disable this script (for private wikis only)
+		wfForbidden( 'img-auth-accessdenied', 'img-auth-public' );
+		return;
 	}
 
-	foreach( $types as $type ) {
-		$extensions = explode( " ", $type );
-		for ( $i=1; $i<count( $extensions ); $i++ ) {
-			if ( $extensions[$i] == $matches[1] ) {
-				return $extensions[0];
-			}
-		}
+	// Get the requested file path (source file or thumbnail)
+	$matches = WebRequest::getPathInfo();
+	if ( !isset( $matches['title'] ) ) {
+		wfForbidden( 'img-auth-accessdenied', 'img-auth-nopathinfo' );
+		return;
+	}
+	$path = $matches['title'];
+	if ( $path && $path[0] !== '/' ) {
+		// Make sure $path has a leading /
+		$path = "/" . $path;
+	}
+
+	// Check for bug 28235: QUERY_STRING overriding the correct extension
+	$whitelist = array();
+	$dotPos = strrpos( $path, '.' );
+	if ( $dotPos !== false ) {
+		$whitelist[] = substr( $path, $dotPos + 1 );
+	}
+	if ( !$wgRequest->checkUrlExtension( $whitelist ) ) {
+		return;
 	}
-	return false;
+
+	// Get the local file repository
+	$repo = RepoGroup::singleton()->getRepo( 'local' );
+
+	// Get the full file storage path and extract the source file name.
+	// (e.g. 120px-Foo.png => Foo.png or page2-120px-Foo.png => Foo.png).
+	// This only applies to thumbnails, and all thumbnails should
+	// be under a folder that has the source file name.
+	if ( strpos( $path, '/thumb/' ) === 0 ) {
+		$name = wfBaseName( dirname( $path ) ); // file is a thumbnail
+		$filename = $repo->getZonePath( 'thumb' ) . substr( $path, 6 ); // strip "/thumb"
+	} else {
+		$name = wfBaseName( $path ); // file is a source file
+		$filename = $repo->getZonePath( 'public' ) . $path;
+	}
+
+	// Check to see if the file exists
+	if ( !$repo->fileExists( $filename ) ) {
+		wfForbidden( 'img-auth-accessdenied','img-auth-nofile', $filename );
+		return;
+	}
+
+	$title = Title::makeTitleSafe( NS_FILE, $name );
+	if ( !$title instanceof Title ) { // files have valid titles
+		wfForbidden( 'img-auth-accessdenied', 'img-auth-badtitle', $name );
+		return;
+	}
+
+	// Run hook for extension authorization plugins
+	if ( !wfRunHooks( 'ImgAuthBeforeStream', array( &$title, &$path, &$name, &$result ) ) ) {
+		wfForbidden( $result[0], $result[1], array_slice( $result, 2 ) );
+		return;
+	}
+
+	// Check user authorization for this title
+	// Checks Whitelist too
+	if ( !$title->userCan( 'read' ) ) {
+		wfForbidden( 'img-auth-accessdenied', 'img-auth-noread', $name );
+		return;
+	}
+
+	// Stream the requested file
+	wfDebugLog( 'img_auth', "Streaming `".$filename."`." );
+	$repo->streamFile( $filename, array( 'Cache-Control: private', 'Vary: Cookie' ) );
+}
+
+/**
+ * Issue a standard HTTP 403 Forbidden header ($msg1-a message index, not a message) and an
+ * error message ($msg2, also a message index), (both required) then end the script
+ * subsequent arguments to $msg2 will be passed as parameters only for replacing in $msg2
+ * @param $msg1
+ * @param $msg2
+ */
+function wfForbidden( $msg1, $msg2 ) {
+	global $wgImgAuthDetails;
+
+	$args = func_get_args();
+	array_shift( $args );
+	array_shift( $args );
+
+	$msgHdr = htmlspecialchars( wfMsg( $msg1 ) );
+	$detailMsgKey = $wgImgAuthDetails ? $msg2 : 'badaccess-group0';
+	$detailMsg = htmlspecialchars( wfMsg( $detailMsgKey, $args ) );
+
+	wfDebugLog( 'img_auth',
+		"wfForbidden Hdr:" . wfMsgExt( $msg1, array( 'language' => 'en' ) ). " Msg: ".
+		wfMsgExt( $msg2, array( 'language' => 'en' ), $args )
+	);
+
+	header( 'HTTP/1.0 403 Forbidden' );
+	header( 'Cache-Control: no-cache' );
+	header( 'Content-Type: text/html; charset=utf-8' );
+	echo <<<ENDS
+<html>
+<body>
+<h1>$msgHdr</h1>
+<p>$detailMsg</p>
+</body>
+</html>
+ENDS;
 }
-?>