public ActionResult EncryptOrDecryptFile([FromForm] IFormFile file, [FromForm] IFormFile key, string nombre)
        {
            try
            {
                string file_path = environment.ContentRootPath;
                string file_name = file.FileName;
                string key_name  = key.FileName;

                FileManage file_manager = new FileManage();
                file_manager.SaveFile(file, file_path, file_name);
                file_manager.SaveFile(key, file_path, key_name);
                file_manager.EncryptOrDecryptManage(file_path, file_name, key_name, nombre);

                FileStream result = new FileStream(file_manager.OutFilePath, FileMode.Open);
                return(File(result, "text/plain", file_manager.OutFileName));
            }
            catch (Exception)
            {
                return(StatusCode(500));
            }
        }