/**
* Image authorisation script
*
- * To use this, see http://www.mediawiki.org/wiki/Manual:Image_Authorization
+ * To use this:
*
* - 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 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.
+ * Your server needs to support PATH_INFO; CGI-based configurations
+ * usually don't.
*
* @file
- *
- **/
-
+ */
+
define( 'MW_NO_OUTPUT_COMPRESSION', 1 );
require_once( dirname( __FILE__ ) . '/includes/WebStart.php' );
wfProfileIn( 'img_auth.php' );
require_once( dirname( __FILE__ ) . '/includes/StreamFile.php' );
$perms = User::getGroupPermissions( array( '*' ) );
-
-// See if this is a public Wiki (no protections)
-if ( $wgImgAuthPublicTest && in_array( 'read', $perms, true ) )
- wfForbidden('img-auth-accessdenied','img-auth-public');
+if ( in_array( 'read', $perms, true ) ) {
+ wfDebugLog( 'img_auth', 'Public wiki' );
+ wfPublicError();
+}
// Extract path and image information
-if( !isset( $_SERVER['PATH_INFO'] ) )
- wfForbidden('img-auth-accessdenied','img-auth-nopathinfo');
+if( !isset( $_SERVER['PATH_INFO'] ) ) {
+ wfDebugLog( 'img_auth', 'Missing PATH_INFO' );
+ wfForbidden();
+}
$path = $_SERVER['PATH_INFO'];
$filename = realpath( $wgUploadDirectory . $_SERVER['PATH_INFO'] );
$realUpload = realpath( $wgUploadDirectory );
+wfDebugLog( 'img_auth', "\$path is {$path}" );
+wfDebugLog( 'img_auth', "\$filename is {$filename}" );
// Basic directory traversal check
-if( substr( $filename, 0, strlen( $realUpload ) ) != $realUpload )
- wfForbidden('img-auth-accessdenied','img-auth-notindir');
+if( substr( $filename, 0, strlen( $realUpload ) ) != $realUpload ) {
+ wfDebugLog( 'img_auth', 'Requested path not in upload directory' );
+ wfForbidden();
+}
// Extract the file name and chop off the size specifier
// (e.g. 120px-Foo.png => Foo.png)
$name = wfBaseName( $path );
if( preg_match( '!\d+px-(.*)!i', $name, $m ) )
$name = $m[1];
-
-// Check to see if the file exists
-if( !file_exists( $filename ) )
- wfForbidden('img-auth-accessdenied','img-auth-nofile',htmlspecialchars($filename));
-
-// Check to see if tried to access a directory
-if( is_dir( $filename ) )
- wfForbidden('img-auth-accessdenied','img-auth-isdir',htmlspecialchars($filename));
-
+wfDebugLog( 'img_auth', "\$name is {$name}" );
$title = Title::makeTitleSafe( NS_FILE, $name );
+if( !$title instanceof Title ) {
+ wfDebugLog( 'img_auth', "Unable to construct a valid Title from `{$name}`" );
+ wfForbidden();
+}
+if( !$title->userCanRead() ) {
+ wfDebugLog( 'img_auth', "User does not have access to read `{$name}`" );
+ wfForbidden();
+}
+$title = $title->getPrefixedText();
-// See if could create the title object
-if( !$title instanceof Title )
- wfForbidden('img-auth-accessdenied','img-auth-badtitle',htmlspecialchars($name));
-
-// Run hook
-if (!wfRunHooks( 'ImgAuthBeforeStream', array( &$title, &$path, &$name, &$result ) ) )
- call_user_func_array('wfForbidden',merge_array(array($result[0],$result[1]),array_slice($result,2)));
-
-// Check user authorization for this title
-// UserCanRead Checks Whitelist too
-if( !$title->userCanRead() )
- wfForbidden('img-auth-accessdenied','img-auth-noread',htmlspecialchars($name));
+// Check the whitelist if needed
+if( !$wgUser->getId() && ( !is_array( $wgWhitelistRead ) || !in_array( $title, $wgWhitelistRead ) ) ) {
+ wfDebugLog( 'img_auth', "Not logged in and `{$title}` not in whitelist." );
+ wfForbidden();
+}
+if( !file_exists( $filename ) ) {
+ wfDebugLog( 'img_auth', "`{$filename}` does not exist" );
+ wfForbidden();
+}
+if( is_dir( $filename ) ) {
+ wfDebugLog( 'img_auth', "`{$filename}` is a directory" );
+ wfForbidden();
+}
// Stream the requested file
-wfDebugLog( 'img_auth', "Streaming `".htmlspecialchars($filename)."`." );
+wfDebugLog( 'img_auth', "Streaming `{$filename}`" );
wfStreamFile( $filename, array( 'Cache-Control: private', 'Vary: Cookie' ) );
wfLogProfilingData();
/**
- * Issue a standard HTTP 403 Forbidden header ($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 $msg2
+ * Issue a standard HTTP 403 Forbidden header and a basic
+ * error message, then end the script
*/
-function wfForbidden($msg1,$msg2) {
- global $wgImgAuthDetails;
- $args = func_get_args();
- array_shift( $args );
- array_shift( $args );
- $MsgHdr = wfMsgHTML($msg1);
- $detailMsg = call_user_func_array('wfMsgHTML',array_merge(array($wgImgAuthDetails ? $msg2 : 'badaccess-group0'),$args));
- wfDebugLog('img_auth', "wfForbidden Hdr:".wfMsgExt( $msg1, array('language' => 'en'))." Msg: ".
- call_user_func_array('wfMsgExt',array_merge( array($msg2, array('language' => 'en')),$args)));
+function wfForbidden() {
header( 'HTTP/1.0 403 Forbidden' );
- header( 'Cache-Control: no-cache' );
+ header( 'Vary: Cookie' );
header( 'Content-Type: text/html; charset=utf-8' );
echo <<<ENDS
<html>
<body>
-<h1>$MsgHdr</h1>
-<p>$detailMsg</p>
+<h1>Access Denied</h1>
+<p>You need to log in to access files on this server.</p>
</body>
</html>
ENDS;
wfLogProfilingData();
exit();
}
+
+/**
+ * Show a 403 error for use when the wiki is public
+ */
+function wfPublicError() {
+ header( 'HTTP/1.0 403 Forbidden' );
+ header( 'Content-Type: text/html; charset=utf-8' );
+ echo <<<ENDS
+<html>
+<body>
+<h1>Access Denied</h1>
+<p>The function of img_auth.php is to output files from a private wiki. This wiki
+is configured as a public wiki. For optimal security, img_auth.php is disabled in
+this case.
+</p>
+</body>
+</html>
+ENDS;
+ wfLogProfilingData();
+ exit;
+}
+
'upload-unknown-size' => 'Unknown size',
'upload-http-error' => 'An HTTP error occured: $1',
-# img_auth script messages
-'img-auth-accessdenied' => 'Access denied',
-'img-auth-nopathinfo' => 'Missing PATH_INFO.
-Your server is not set up to pass this information.
-It may be CGI-based and cannot support img_auth.
-See http://www.mediawiki.org/wiki/Manual:Image_Authorization.',
-'img-auth-notindir' => 'Requested path is not in the configured upload directory.',
-'img-auth-badtitle' => 'Unable to construct a valid title from "$1".',
-'img-auth-nologinnWL' => 'You are not logged in and "$1" is not in the whitelist.',
-'img-auth-nofile' => 'File "$1" does not exist.',
-'img-auth-isdir' => 'You are trying to access a directory "$1".
-Only file access is allowed.',
-'img-auth-streaming' => 'Streaming "$1".',
-'img-auth-public' => 'The function of img_auth.php is to output files from a private wiki.
-This wiki is configured as a public wiki.
-For optimal security, img_auth.php is disabled.',
-'img-auth-noread' => 'User does not have access to read "$1".',
-
# Some likely curl errors. More could be added from <http://curl.haxx.se/libcurl/c/libcurl-errors.html>
'upload-curl-error6' => 'Could not reach URL',
'upload-curl-error6-text' => 'The URL provided could not be reached.
'upload-file-error' => '{{Identical|Internal error}}',
-# img_auth script messages
-'img-auth-accessdenied' => '[[mw:Manual:Image Authorization|Manual:Image Authorization]]: Access Denied',
-'img-auth-nopathinfo' => '[[mw:Manual:Image Authorization|Manual:Image Authorization]]: Missing PATH_INFO - see english description',
-'img-auth-notindir' => '[[mw:Manual:Image Authorization|Manual:Image Authorization]]: When the specified path is not in upload directory.',
-'img-auth-badtitle' => '[[mw:Manual:Image Authorization|Manual:Image Authorization]]: Bad title, $1 is the invalid title',
-'img-auth-nologinnWL' => '[[mw:Manual:Image Authorization|Manual:Image Authorization]]: Logged in and file not whitelisted. $1 is the file not in whitelist.',
-'img-auth-nofile' => '[[mw:Manual:Image Authorization|Manual:Image Authorization]]: Non existent file, $1 is the file that does not exist.',
-'img-auth-isdir' => '[[mw:Manual:Image Authorization|Manual:Image Authorization]]: Trying to access a directory instead of a file, $1 is the directory.',
-'img-auth-streaming' => '[[mw:Manual:Image Authorization|Manual:Image Authorization]]: Is now streaming file specified by $1.',
-'img-auth-public' => '[[mw:Manual:Image Authorization|Manual:Image Authorization]]: An error message when the admin has configured the wiki to be a public wiki, but is using img_auth script - normally this is a configuration error, except when special restriction extensions are used',
-'img-auth-noread' => '[[mw:Manual:Image Authorization|Manual:Image Authorization]]: User does not have access to read file, $1 is the file',
-
'license' => 'This appears in the upload form for the license drop-down. The header in the file description page is now at {{msg-mw|License-header}}.',
'nolicense' => '{{Identical|None selected}}',
'license-nopreview' => 'Error message when a certain license does not exist',