Encrypt XML Subtree

Encrypt an entire subtree within an XML document

Download Chilkat Java Library

import com.chilkatsoft.*;

public class ChilkatExample {

  static {
    try {
        System.loadLibrary("chilkat");
    } catch (UnsatisfiedLinkError e) {
      System.err.println("Native code library failed to load.\n" + e);
      System.exit(1);
    }
  }

  public static void main(String argv[])
  {

    CkXml xml = new CkXml();

    //  First, build a sample XML document:

    CkXml xml = new CkXml();

    xml.put_Tag("stocks");

    CkXml xmlM;
    xmlM = xml.NewChild("Microsoft","");
    xmlM.NewChild2("symbol","MSFT");
    xmlM.NewChild2("recentPrice","34.50");

    CkXml xmlG;
    xmlG = xml.NewChild("Google","");
    xmlG.NewChild2("symbol","GOOG");
    xmlG.NewChild2("recentPrice","679.00");

    //  Display the unencrypted XML:
    System.out.println(xml.getXml());

    //  This is the XML displayed:
    //  <stocks>
    //      <Microsoft>
    //          <symbol>MSFT</symbol>
    //          <recentPrice>34.50</recentPrice>
    //      </Microsoft>
    //      <Google>
    //          <symbol>GOOG</symbol>
    //          <recentPrice>679.00</recentPrice>
    //      </Google>
    //  </stocks>

    //  The goal is to encrypt the "Microsoft" sub-tree.
    //  The EncryptContent method encryptes the content
    //  within a single XML node (not an entire sub-tree).
    //  Therefore, to encrypt a sub-tree,  you must first
    //  compress it into a single node, and then encrypt it.
    xmlM.ZipTree();

    //  Now encrypt the content using 128-bit AES encryption:
    xmlM.EncryptContent("secretPassword");

    //  Display the XML with the encrypted sub-tree:
    System.out.println(xml.getXml());

    //  This is displayed:
    //  <stocks>
    //      <Microsoft><![CDATA
    //  [JkiMcoK3Mi198rT30KvicDEzu5WuJgMH+8KS0UZbcRE
    //  2CtdXplphV0iCdPMYnS01O6Ly6S4QCQSReMCshG/V3
    //  8btJIZv/VLG9JZRsQk0bBafMhx7B2fQfm8YENke/JIM
    //  ]]>    </Microsoft>
    //      <Google>
    //          <symbol>GOOG</symbol>
    //          <recentPrice>679.00</recentPrice>
    //      </Google>
    //  </stocks>

    //  Now decrypt and unzip:
    xmlM.DecryptContent("secretPassword");
    boolean success;
    success = xmlM.UnzipTree();
    if (success != true) {
        System.out.println("Failed to unzip tree");
    }

    //  Display the restored document:
    System.out.println(xml.getXml());


  }
}