Java

Encrypting and Decrypting Content

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Demonstrates how to encrypt and decrypt the content of an XML node using 128-bit CBC AES encryption.

The input XML, available at http://www.chilkatsoft.com/data/fox.xml, is this:

<root>
    <fox1>The quick brown fox jumps over the lazy dog</fox1>
    <fox2>The quick brown fox jumps over the lazy dog
        <child1>ABC</child1>
        <child2>XYZ</child2>
    </fox2>
</root>

Chilkat2 Java

import com.chilkatsoft.chilkat2.ChilkatException;
import com.chilkatsoft.chilkat2.Xml;

public class ChilkatExample {

    public static void main(String[] args) {
        boolean success = false;

        Xml xml = new Xml();

        // The sample input XML is available at http://www.chilkatsoft.com/data/fox.xml
        try {
            xml.loadXmlFile("fox.xml");
        } catch (ChilkatException e) {
            System.out.println(e.getLastErrorText());
            return;
        }

        // Navigate to the "fox1" node, which is the 1st child:
        success = xml.firstChild2();

        // Encrypt the content:
        xml.encryptContent("myPassword");

        // Navigate back to the root:
        xml.getRoot2();

        // Examine the new XML document:
        System.out.println(xml.getXml());

        // This is the XML w/ the encrypted content:
        // <root>
        //     <fox1>1hTtf7XmO+78H+OIr5eWHIuXxP78KPeYrZbsD0HX4negO9ZRqYMBY4s46sPNp+Q+
        //     </fox1>
        //     <fox2>The quick brown fox jumps over the lazy dog
        //         <child1>ABC</child1>
        //         <child2>XYZ</child2>
        //     </fox2>
        // </root>

        // Now decrypt and show that the original content was restored:
        success = xml.firstChild2();
        xml.decryptContent("myPassword");
        xml.getRoot2();
        System.out.println(xml.getXml());

        // Now encrypt the content of the "fox2" node.
        // First navigate to the "fox2" child.
        xml.findChild2("fox2");
        xml.encryptContent("myPassword");
        xml.getRoot2();
        System.out.println(xml.getXml());

        // This is the XML w/ the "fox2" encrypted content:

        // <root>
        //     <fox1>The quick brown fox jumps over the lazy dog</fox1>
        //     <fox2>1hTtf7XmO+78H+OIr5eWHIuXxP78KPeYrZbsD0HX4negO9ZRqYMBY4s46sPNp+Q+
        //
        //         <child1>ABC</child1>
        //         <child2>XYZ</child2>
        //     </fox2>
        // </root>

        // Notice that the *content* of the node is encrypted.  The child nodes are NOT encrypted.
        // This is intentional.  To encrypt the content + the subtrees rooted at a given node,
        // one would call ZipTree to transform the content and subtrees
        // to Base64-encoded compressed content, and then call
        // EncryptContent to encrypt.

        // Finally, decrypt the "fox2" content:
        xml.findChild2("fox2");
        xml.decryptContent("myPassword");
        xml.getRoot2();
        System.out.println(xml.getXml());
    }
}