我们可以在DES中制作自己的S-Box,IP,IP~和其他表吗？它仍然可以使用或应该使用它们提供的内容吗？

import com.tencent.cloud.common.util.Security;
import com.tencent.cloud.common.util.Security.Digests;
import com.tencent.cloud.common.util.Security.Keys;
import com.tencent.cloud.common.util.Security.Signs;
import com.tencent.cloud.common.util.Security.Validators;
import com.tencent.cloud.common.util.Strings;
import com.tencent.cloud.common.util.XmlParser;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
import java.io.BufferedReader;
import java.io.FileReader;
import java.io.IOException;
import java.security.InvalidKeyException;
import java.security.Key;
import java.security.KeyPair;
import java.security.KeyPairGenerator;
import java.security.NoSuchAlgorithmException;
import java.security.Signature;
import java.security.SignatureException;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import java.util.Map;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;
import org.xml.sax.SAXException;

public class MySBoxCreator {
    public static void main(String[] args) {
        Document document = DocumentBuilderFactory.newInstance().newDocumentBuilder().newDocument();
        Element rootElement = document.createElement("sboxes");
        document.appendChild(rootElement);

        createSBox("1", rootElement);
        createSBox("2", rootElement);
        createSBox("3", rootElement);

        TransformerFactory transformerFactory = TransformerFactory.newInstance();
        Transformer transformer = transformerFactory.newTransformer();
        transformer.setOutputProperty(OutputKeys.INDENT, "yes");
        transformer.setOutputProperty(OutputKeys.ENCODING, "UTF-8");
        transformer.setOutputProperty(OutputKeys.METHOD, "xml");
        transformer.setOutputProperty("{http://xml.apache.org/xslt}indent-amount", "2");
        transformer.setOutputProperty(OutputKeys.MEDIA_TYPE, "text/xml");
        transformer.setOutputProperty(OutputKeys.VERSION, "1.0");
        transformer.setOutputProperty(OutputKeys.DOCTYPE_SYSTEM, "system.dtd");
        transformer.setOutputProperty(OutputKeys.DOCTYPE_PUBLIC, "public.dtd");
        transformer.setOutputProperty(OutputKeys.CDATA_SECTION_ELEMENTS, "content");
        transformer.setOutputProperty(OutputKeys.STANDALONE, "yes");
        transformer.setOutputProperty(OutputKeys.OMIT_XML_DECLARATION, "no");
        transformer.setOutputProperty(OutputKeys.NEWLINE, "\n");

        transformer.transform(new DOMSource(document), new StreamResult(new FileOutputStream("sboxes.xml")));
    }

    private static void createSBox(String name, Element parentElement) {
        Element boxElement = document.createElement("box");
        boxElement.setAttribute("name", name);
        parentElement.appendChild(boxElement);

        Element boxContentElement = document.createElement("content");
        boxContentElement.appendChild(document.createTextNode("Default content"));
        boxElement.appendChild(boxContentElement);

        addSignature(boxElement, "1");
    }

    private static void addSignature(Element boxElement, String signee) {
        Element sigElement = document.createElement("signature");
        sigElement.setAttribute("signee", signee);
        sigElement.setAttribute("algorithm", "rsa");
        sigElement.setAttribute("signature", "dummy");
        boxElement.appendChild(sigElement);
    }
}