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<?php
/**
* @package com_zoo
* @author YOOtheme http://www.yootheme.com
* @copyright Copyright (C) YOOtheme GmbH
* @license http://www.gnu.org/licenses/gpl.html GNU/GPL
*/
/**
* Checksum Helper class
*
* Create and verify checksums
*
* @package Framework.Helpers
*/
class ChecksumHelper extends AppHelper {
/**
* Create a file checksum
*
* @param string $path The path to the files
* @param string $filename The filename of the checksum
*
* @return boolean If the operation was successful
*
* @since 1.0.0
*/
public function create($path, $filename = 'checksums') {
$path = rtrim(str_replace(DIRECTORY_SEPERATOR, '/', $path), '/').'/';
$files = $this->_readDirectory($path);
if (is_array($files)) {
$checksums = '';
foreach ($files as $file) {
// dont include the checksum file itself
if ($file == $filename) {
continue;
}
$checksums .= md5_file($path.$file)." {$file}\n";
}
return file_put_contents($path.$filename, $checksums);
}
return false;
}
/**
* Verify a file checksum
*
* @param string $path The path to the files
* @param string $checksum The checksum file
* @param array $log Log Array
* @param array $filter An array of filter functions
* @param string $prefix A prefix for the file
*
* @return boolean If the checksum was valid
*
* @since 1.0.0
*/
public function verify($path, $checksum, &$log = null, array $filter = array(), $prefix = '') {
$path = rtrim(str_replace(DIRECTORY_SEPARATOR, '/', $path), '/').'/';
if ($rows = file($checksum)) {
$checksum_files = array();
foreach ($rows as $row) {
list($md5, $file) = explode(' ', trim($row), 2);
foreach ($filter as $callback) {
if ($callback && !($file = call_user_func($callback, $file))) {
continue 2;
}
}
$checksum_files[] = $file;
if (!file_exists($path.$file)) {
$log['missing'][] = $prefix.$file;
} elseif (md5_file($path.$file) != $md5) {
$log['modified'][] = $prefix.$file;
}
}
foreach ($this->_readDirectory($path) as $file) {
if (!in_array($file, $checksum_files) && !preg_match('/'.preg_quote($file, '/').'$/i', $checksum)) {
$log['unknown'][] = $prefix.$file;
}
}
}
return empty($log);
}
/**
* Read the files from a directory
*
* @param string $path The path in which to search
* @param string $prefix File prefix
* @param boolean $recursive If the scan should be recursive (default: true)
*
* @return array The file list
*
* @since 1.0.0
*/
protected function _readDirectory($path, $prefix = '', $recursive = true) {
$files = array();
$ignore = array('.', '..', '.DS_Store', '.svn', '.git', '.gitignore', '.gitmodules', 'cgi-bin');
foreach (scandir($path) as $file) {
// ignore file ?
if (in_array($file, $ignore)) {
continue;
}
// get files
if (is_dir($path.'/'.$file) && $recursive) {
$files = array_merge($files, $this->_readDirectory($path.'/'.$file, $prefix.$file.'/', $recursive));
} else {
$files[] = $prefix.$file;
}
}
return $files;
}
}