Integrity.php

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<?php

namespace Rsi\Fred\Security\Server;

class Integrity extends \Rsi\Fred\Security\Server{

  public $root = null; //!< Root directory for check.
  public $filter = '/\\.php$/i'; //!< Pattern for files to check.
  public $log = null; //!< File to store statistics (in temp dir when empty).
  public $mode = 0666;

  public function check(){
    $log = $this->component('log');
    $errors = null;
    if(!$this->root){
      if($this->root = \Rsi\Http::docRoot()) $log->warning('Using default root: ' . $this->root,__FILE__,__LINE__);
      else $log->error('No root set',__FILE__,__LINE__);
    }
    if($this->root){
      $errors = [];
      if(!$this->log) $this->log = \Rsi\File::tempDir() . 'integrity.log';
      $files = \Rsi\File::unserialize($this->log,[]);
      foreach(\Rsi\File::find($this->root,[\Rsi\File::FIND_FILTER_TYPE => \Rsi\File::FIND_TYPE_FILE,\Rsi\File::FIND_FILTER_NAME . '//' => $this->filter],true) as $filename => $info){
        $hash = md5(file_get_contents($filename));
        $error = null;
        if(!array_key_exists($filename,$files)) $error = 'New file';
        elseif($files[$filename] != $hash) $error = 'Changed file';
        if($error){
          $log->error($error . ': ' . $filename,__FILE__,__LINE__);
          $errors[$filename] = $error;
          $files[$filename] = $hash;
        }
      }
      \Rsi\File::serialize($this->log,$files,$this->mode);
    }
    return $errors;
  }

}