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New options for filesystme stream-wrapper:

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- all:   false (default) = ignore files starting with a dot '.',
  true = show all files (. and .. are always ignored!)
- exec: false (default) = do NOT allow to upload or modify scripts, 
  true = allow it (if docroot is mounted, this allows to run scripts!)
--> deny_script method was added to egw_vfs and calls to it from
filemanager
Other fixes:
- missing write rights of the webserver were not removed from perms
  (causing warnings to be displayed in the ui)
- rename was not working due to typos
--> should be backported for obvious reasons to 1.6
This commit is contained in:
Ralf Becker 2009-03-31 11:30:12 +00:00
parent 637b6557fb
commit 8f7f89666f
3 changed files with 107 additions and 16 deletions
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13
filemanager/inc/class.filemanager_ui.inc.php
View File

@ -5,7 +5,7 @@
* @link http://www.egroupware.org
* @package filemanager
* @author Ralf Becker <RalfBecker-AT-outdoor-training.de>
* @copyright (c) 2008 by Ralf Becker <RalfBecker-AT-outdoor-training.de>
* @copyright (c) 2008-9 by Ralf Becker <RalfBecker-AT-outdoor-training.de>
* @license http://opensource.org/licenses/gpl-license.php GPL - GNU General Public License
* @version $Id$
*/
@ -274,7 +274,12 @@ class filemanager_ui
// strip '?', '/' and '#' from filenames, as they are forbidden for sqlfs / make problems
$path = egw_vfs::concat($dir,str_replace(array('?','/','#'),'',$name));
if (egw_vfs::stat($path))
if(egw_vfs::deny_script($path))
{
$response->addAlert(lang('You are NOT allowed to upload a script!'));
$response->addScript("document.getElementById('$id').value='';");
}
elseif (egw_vfs::stat($path))
{
if (egw_vfs::is_dir($path))
{
@ -656,6 +661,10 @@ class filemanager_ui
else
{
$msg .= lang('Rename of %1 to %2 failed!',$path,$to).' ';
if (egw_vfs::deny_script($to))
{
$msg .= lang('You are NOT allowed to upload a script!').' ';
}
}
}
elseif ($name[0] == '#' || $name == 'comment')

15
phpgwapi/inc/class.egw_vfs.inc.php
View File

@ -7,7 +7,7 @@
* @package api
* @subpackage vfs
* @author Ralf Becker <RalfBecker-AT-outdoor-training.de>
* @copyright (c) 2008 by Ralf Becker <RalfBecker-AT-outdoor-training.de>
* @copyright (c) 2008-9 by Ralf Becker <RalfBecker-AT-outdoor-training.de>
* @version $Id$
*/
@ -695,6 +695,17 @@ class egw_vfs extends vfs_stream_wrapper
return self::is_readable($path,1);
}
/**
* Check if path is a script and write access would be denied by backend
*
* @param string $path
* @return boolean true if $path is a script AND exec mount-option is NOT set, false otherwise
*/
static function deny_script($path)
{
return self::_call_on_backend('deny_script',array($path),true);
}
/**
* Set or delete extended acl for a given path and owner (or delete them if is_null($rights)
*
@ -1012,7 +1023,7 @@ class egw_vfs extends vfs_stream_wrapper
$b = explode('/',$b);
$url = implode('/',array_merge($a,$b));
}
return $url.($query ? '?'.$query : '');
return $url.($query ? (strpos($url,'?')===false ? '?' : '&').$query : '');
}
/**

95
phpgwapi/inc/class.filesystem_stream_wrapper.inc.php
View File

@ -7,7 +7,7 @@
* @package api
* @subpackage vfs
* @author Ralf Becker <RalfBecker-AT-outdoor-training.de>
* @copyright (c) 2008 by Ralf Becker <RalfBecker-AT-outdoor-training.de>
* @copyright (c) 2008-9 by Ralf Becker <RalfBecker-AT-outdoor-training.de>
* @version $Id$
*/
@ -21,6 +21,9 @@
* - user: uid or user-name owning the path, default root
* - group: gid or group-name owning the path, default root
* - mode: mode bit for the path, default 0005 (read and execute for nobody)
* - all: false (default) = ignore files starting with a dot '.', true = show all files (. and .. are always ignored!)
* - exec: false (default) = do NOT allow to upload or modify scripts, true = allow it (if docroot is mounted, this allows to run scripts!)
* scripts are considered every file having a script-extension (eg. .php, .pl, .py), defined with SCRIPT_EXTENSION_PREG constant
*
* @link http://www.php.net/manual/en/function.stream-wrapper-register.php
*/
@ -79,6 +82,13 @@ class filesystem_stream_wrapper implements iface_stream_wrapper
*/
private $opened_dir_url;
/**
* Should dir show all files, or only the ones NOT starting with a dot (. and .. are never shown)
*
* @var boolean
*/
private $dir_show_all = false;
/**
* How much should be logged to the apache error-log
*
@ -88,6 +98,11 @@ class filesystem_stream_wrapper implements iface_stream_wrapper
*/
const LOG_LEVEL = 1;
/**
* Regular expression identifying scripts, to NOT allow updating them if exec mount option is NOT set
*/
const SCRIPT_EXTENSIONS_PREG = '/\.(php[0-9]*|pl|py)$/';
/**
* This method is called immediately after your stream object is created.
*
@ -129,10 +144,20 @@ class filesystem_stream_wrapper implements iface_stream_wrapper
}
return false;
}
if ($mode != 'r' && self::deny_script($url))
{
if (self::LOG_LEVEL) error_log(__METHOD__."($url,$mode,$options) permission denied, file is a script!");
if (!($options & STREAM_URL_STAT_QUIET))
{
trigger_error(__METHOD__."($url,$mode,$options) permission denied, file is a script!",E_USER_WARNING);
}
return false;
}
// open the "real" file
if (!($this->opened_stream = fopen(parse_url($url,PHP_URL_PATH),$mode,$options)))
if (!($this->opened_stream = fopen($path=parse_url($url,PHP_URL_PATH),$mode,$options)))
{
if (self::LOG_LEVEL) error_log(__METHOD__."($url,$mode,$options) fopen('$path','$mode',$options) returned false!");
return false;
}
$this->opened_stream_url = $url;
@ -303,21 +328,27 @@ class filesystem_stream_wrapper implements iface_stream_wrapper
// check access rights
if (!($from_stat = self::url_stat($url_from,0)) || !egw_vfs::check_access(egw_vfs::dirname($url_from),egw_vfs::WRITABLE))
{
if (self::LOG_LEVEL) error_log(__METHOD__."($url_from,$url_to): $path_from permission denied!");
if (self::LOG_LEVEL) error_log(__METHOD__."($url_from,$url_to): $from[path] permission denied!");
return false; // no permission or file does not exist
}
$to_dir = egw_vfs::dirname($url_to);
if (!egw_vfs::check_access($to_dir,egw_vfs::WRITABLE,$to_dir_stat = self::url_stat($to_dir,0)))
{
if (self::LOG_LEVEL) error_log(__METHOD__."($url_from,$url_to): $path_to permission denied!");
if (self::LOG_LEVEL) error_log(__METHOD__."($url_from,$url_to): $to_dir permission denied!");
return false; // no permission or parent-dir does not exist
}
if (self::deny_script($url_to))
{
if (self::LOG_LEVEL) error_log(__METHOD__."($url_from,$url_to) permission denied, file is a script!");
return false;
}
// the filesystem stream-wrapper does NOT allow to rename files to directories, as this makes problems
// for our vfs too, we abort here with an error, like the filesystem one does
if (($to_stat = self::url_stat($path_to,0)) &&
if (($to_stat = self::url_stat($to['path'],0)) &&
($to_stat['mime'] === self::DIR_MIME_TYPE) !== ($from_stat['mime'] === self::DIR_MIME_TYPE))
{
$is_dir = $to_stat['mime'] === self::DIR_MIME_TYPE ? 'a' : 'no';
if (self::LOG_LEVEL) error_log(__METHOD__."($url_to,$url_from) $path_to is $is_dir directory!");
if (self::LOG_LEVEL) error_log(__METHOD__."($url_to,$url_from) $to[path] is $is_dir directory!");
return false; // no permission or file does not exist
}
// if destination file already exists, delete it
@ -459,16 +490,19 @@ class filesystem_stream_wrapper implements iface_stream_wrapper
*/
function dir_opendir ( $url, $options )
{
error_log(__METHOD__."($url,$options)");
if (self::LOG_LEVEL > 1) error_log(__METHOD__."($url,$options)");
$this->opened_dir = null;
$parts = parse_url($this->opened_dir_url = $url);
parse_str($parts['query'],$get);
$this->dir_show_all = (bool)$get['all'];
// ToDo: check access rights
if (!($this->opened_dir = opendir($parts['path'])))
{
if (self::LOG_LEVEL > 0) error_log(__METHOD__."($url,$options) opendir('$parts[path]') failed!");
return false;
}
return true;
@ -504,7 +538,6 @@ class filesystem_stream_wrapper implements iface_stream_wrapper
{
$parts = parse_url($url);
//error_log(__METHOD__."('$path',$flags) calling stat($url)");
$stat = @stat($parts['path']); // suppressed the stat failed warnings
if ($stat)
@ -513,12 +546,18 @@ class filesystem_stream_wrapper implements iface_stream_wrapper
if (!self::parse_query($parts['query'],$uid,$gid,$mode))
{
return false;
if (self::LOG_LEVEL > 0) error_log(__METHOD__."($url,$flags) can NOT self::parse_query('$parts[query]')!");
}
$stat['uid'] = $stat[4] = $uid;
$stat['gid'] = $stat[5] = $gid;
$stat['mode'] = $stat[2] = $stat['mode'] & self::MODE_DIR ? self::MODE_DIR | $mode : self::MODE_FILE | ($mode & ~0111);
// write rights also depend on the write rights of the webserver
if (!is_writable($parts['path']))
{
$stat['mode'] = $stat[2] = $stat['mode'] & ~0222;
}
//echo __METHOD__."($url,$flags) path=$parts[path], mount_mode=".sprintf('0%o',$mode).", mode=".sprintf('0%o',$stat['mode']).'='.egw_vfs::int2mode($stat['mode'])."\n"; //print_r($stat);
}
if (self::LOG_LEVEL > 1) error_log(__METHOD__."($url,$flags) path=$parts[path], mount_mode=".sprintf('0%o',$mode).", mode=".sprintf('0%o',$stat['mode']).'='.egw_vfs::int2mode($stat['mode']));
return $stat;
}
@ -534,7 +573,19 @@ class filesystem_stream_wrapper implements iface_stream_wrapper
*/
function dir_readdir ( )
{
return readdir($this->opened_dir);
do {
$file = readdir($this->opened_dir);
$ignore = !($file === false || // stop if no more dirs or
$file[0] != '.' || // file does NOT start with a dot '.' or
($this->dir_show_all && $file != '.' && $file != '..' )); // file not . or .. or dir_show_all set
if (self::LOG_LEVEL > 1 && $ignore) error_log(__METHOD__.'() ignoring '.array2string($file));
}
while ($ignore);
if (self::LOG_LEVEL > 1) error_log(__METHOD__.'() returning '.array2string($file));
return $file;
}
/**
@ -559,11 +610,11 @@ class filesystem_stream_wrapper implements iface_stream_wrapper
*/
function dir_closedir ( )
{
$ret = closedir($this->opened_dir);
closedir($this->opened_dir);
$this->opened_dir = $this->extra_dirs = null;
return $ret;
return true;
}
/**
@ -643,6 +694,26 @@ class filesystem_stream_wrapper implements iface_stream_wrapper
//echo __METHOD__.'('.print_r($query,true).") uid=$uid, gid=$gid, mode=".sprintf('0%o',$mode)."\n";
return true;
}
/**
* Check if url is a script (self::$script_extentions) and exec mount option is NOT set
*
* @param string $url
* @return boolean true if $url is a script AND exec is NOT set, false otherwise
*/
static function deny_script($url)
{
$parts = parse_url($url);
parse_str($parts['query'],$get);
$deny = !$get['exec'] && preg_match(self::SCRIPT_EXTENSIONS_PREG,$parts['path']);
if (self::LOG_LEVEL > 1 || self::LOG_LEVEL > 0 && $deny)
{
error_log(__METHOD__."($url) returning ".array2string($deny));
}
return $deny;
}
}
stream_register_wrapper(filesystem_stream_wrapper::SCHEME ,'filesystem_stream_wrapper');