code: private String ocspResponseToB64(OCSPResp ocspResp)
    {
      if (ocspResp == null)
      {
        return null;
      }
      try
      {
        return Base64.encodeBase64String(ocspResp.getEncoded());
      }
      catch (Throwable ex)
      {
        LOGGER.debug("Could not convert OCSP Response to Base64");
        return null;
      }
    }
docs: OCSP Response Utils