Java

XML Inclusive Canonicalization

See more XML Digital Signatures Examples

Demonstrates how to convert XML to the Inclusive XML Canonicalization form as specified in http://www.w3.org/TR/xml-c14n/ Chilkat2 Java

import com.chilkatsoft.chilkat2.Http;
import com.chilkatsoft.chilkat2.StringBuilder;
import com.chilkatsoft.chilkat2.XmlDSig;

public class ChilkatExample {

    public static void main(String[] args) {
        // This example requires the Chilkat API to have been previously unlocked.
        // See Global Unlock Sample for sample code.

        // The XML digital signature verification class provides utility methods for
        // XML canonicalization.  This example demonstrates how to do inclusive XML canonicalization.

        Http http = new Http();
        StringBuilder sbXml = new StringBuilder();
        XmlDSig canon = new XmlDSig();

        // Use inclusive XML canonicalization.
        String canonVersion = "C14N";
        boolean withComments = false;

        String url = "https://www.chilkatsoft.com/exampleData/c14n/test7.xml";
        http.quickGetSb(url, sbXml);

        // This is the input XML:
        // The XML comment is referring to when exclusive XML canonicalization is applied.  With inclusive canonicalization, the namespace nodes
        // are kept, as we'll see below..

        // <doc>
        // <!-- A namespace node N is ignored if the nearest ancestor element of the node's parent element that is in the node-set has a namespace node in the node-set with the same local name and value as N. -->
        //     <animal xmlns:aa="https://www.animal.com/">
        //         <reptile xmlns:bb="https://www.reptile.com/">
        //               <lizard xmlns="" type="african fat tailed" abc="xyz" xmlns:aa="https://www.animal.com/" />
        //               <snake type="poisonous rattler" xmlns:bb="https://www.reptile.com/" >
        //               </snake>
        //           </reptile>
        //       </animal>
        // </doc>

        String xmlInclCanon = canon.canonicalizeXml(sbXml.getAsString(), canonVersion, withComments);
        System.out.println(xmlInclCanon);

        // The C14N (inclusive) canonicalization is:

        // <doc>
        //
        //     <animal xmlns:aa="https://www.animal.com/">
        //         <reptile xmlns:bb="https://www.reptile.com/">
        //               <lizard abc="xyz" type="african fat tailed"></lizard>
        //               <snake type="poisonous rattler">
        //               </snake>
        //           </reptile>
        //       </animal>
        // </doc>

        // To see the difference, let's do exclusive canonicalization..
        canonVersion = "EXCL_C14N";

        String xmlExclCanon = canon.canonicalizeXml(sbXml.getAsString(), canonVersion, withComments);
        System.out.println(xmlExclCanon);

        // // The C14N (exclusive) canonicalization is:
        //
        // <doc>
        //
        //     <animal>
        //         <reptile>
        //               <lizard abc="xyz" type="african fat tailed"></lizard>
        //               <snake type="poisonous rattler">
        //               </snake>
        //           </reptile>
        //       </animal>
        // </doc>
    }
}