Great way to encrypt and decrypt files with AES-256 with CBC mode. Made for Kohana framework (controller).

gistfile1.aw

<?php defined('SYSPATH') or die('No direct script access.');

class Controller_Filemanager extends Controller {

        private $file = '/var/www/assets/img/big/IMG_2083.JPG';
        private $new_file = '/var/www/assets/encrypt/';
        private $key = 'your key';
        private $cipher = MCRYPT_RIJNDAEL_256;
        private $mode = MCRYPT_MODE_CBC;

        public function action_encrypt()
        {       
                //$finfo = finfo_open(FILEINFO_MIME_TYPE);
                //$mime_type = finfo_file($finfo, $file);
                //$read_file = readfile($file);
                $file_content = file_get_contents($this->file);
                $class_encrypt = new Encrypt($this->key, $this->mode, $this->cipher);
                $encrypt_data = $class_encrypt->encode($file_content);
                $handle = fopen($this->new_file.basename($this->file).'.enc', 'w') or die("Can't open file.");
                fwrite($handle, $encrypt_data);
                fclose($handle);
                exit;
        }

        public function action_decrypt()
        {
                $file_content = file_get_contents($this->new_file.basename($this->file).'.enc', 'r');
                $class_encrypt = new Encrypt($this->key, $this->mode, $this->cipher);
                $decrypt_data = $class_encrypt->decode($file_content);
                header('Content-Type: image/jpeg');
                print_r($decrypt_data);
                exit;
        }

}