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<?php
/**
* ANGIE - The site restoration script for backup archives created by Akeeba Backup and Akeeba Solo
*
* @package angie
* @copyright Copyright (c)2009-2023 Nicholas K. Dionysopoulos / Akeeba Ltd
* @license GNU General Public License version 3, or later
*/
defined('_AKEEBA') or die();
/**
* This file may contain code from the Joomla! Platform, Copyright (c) 2005 -
* 2012 Open Source Matters, Inc. This file is NOT part of the Joomla! Platform.
* It is derivative work and clearly marked as such as per the provisions of the
* GNU General Public License.
*/
abstract class AUtilsPath
{
/**
* Function to strip additional / or \ in a path name.
*
* @param string $path The path to clean.
* @param string $ds Directory separator (optional).
*
* @return string The cleaned path.
*/
public static function clean($path, $ds = DIRECTORY_SEPARATOR)
{
$path = trim($path);
if (empty($path))
{
$path = APATH_ROOT;
}
else
{
// Remove double slashes and backslashes and convert all slashes and backslashes to DIRECTORY_SEPARATOR
$path = preg_replace('#[/\\\\]+#', $ds, $path);
}
return $path;
}
/**
* Checks for snooping outside of the file system root.
*
* @param string $path A file system path to check.
* @param string $ds Directory separator (optional).
*
* @return string A cleaned version of the path or exit on error.
*/
public static function check($path, $ds = DIRECTORY_SEPARATOR)
{
if (strpos($path, '..') !== false)
{
// Don't translate
throw new Exception( __CLASS__ . '::check Use of relative paths not permitted', 20);
}
$path = self::clean($path);
if ((APATH_ROOT != '') && strpos($path, self::clean(APATH_ROOT)) !== 0)
{
// Don't translate
throw new Exception( __CLASS__ . '::check Snooping out of bounds @ ' . $path, 20);
}
return $path;
}
/**
* Searches the directory paths for a given file.
*
* @param mixed $paths An path string or array of path strings to search in
* @param string $file The file name to look for.
*
* @return mixed The full path and file name for the target file, or boolean false if the file is not found in any of the paths.
*/
public static function find($paths, $file)
{
settype($paths, 'array'); //force to array
// Start looping through the path set
foreach ($paths as $path)
{
// Get the path to the file
$fullname = $path . '/' . $file;
// Is the path based on a stream?
if (strpos($path, '://') === false)
{
// Not a stream, so do a realpath() to avoid directory
// traversal attempts on the local file system.
$path = realpath($path); // needed for substr() later
$fullname = realpath($fullname);
}
// The substr() check added to make sure that the realpath()
// results in a directory registered so that
// non-registered directories are not accessible via directory
// traversal attempts.
if (file_exists($fullname) && substr($fullname, 0, strlen($path)) == $path)
{
return $fullname;
}
}
// Could not find the file in the set of paths
return false;
}
}