# File lib/serverspec/type/x509_certificate.rb, line 54
    def validity_in_days
      runner_res = run_openssl_command_with("-enddate -noout")
      return 0 if runner_res.exit_status != 0

      date_map = parse_dates_str_to_map(runner_res.stdout)
      diff = date_map[:notAfter] - Time.now
      ( diff/(60*60*24) )
    end