Node.js

Calculate HRMC IRMark

See more XML Digital Signatures Examples

Demonstrates how to calculate an IRmark for an HMRC GovTalkMessage XML document.

Chilkat Node.js Downloads

Node.js

NODEJS_PRELUDE

function chilkatExample() {

    // This example requires the Chilkat API to have been previously unlocked.
    // See Global Unlock Sample for sample code.

    // First build a sample (but incomplete) GovTalkMessage.
    // You can replace this code with a call to LoadXml or LoadXmlFile..
    // 
    // Note: The online tool at https://tools.chilkat.io/xmlCreate.cshtml
    // can be used to generate XML code that creates a given XML document.
    var xml = new chilkat.Xml();
    xml.Tag = "GovTalkMessage";
    xml.AddAttribute("xmlns","http://www.govtalk.gov.uk/CM/envelope");
    xml.UpdateAttrAt("Body|Message",true,"xmlns","urn:g3.ge:dea:call:SendDocument:v1");
    xml.UpdateChildContent("Body|Message","................");

    // This is the XML created:
    // <?xml version="1.0" encoding="utf-8" ?>
    // <GovTalkMessage xmlns="http://www.govtalk.gov.uk/CM/envelope">
    //     <Body>
    //         <Message xmlns="urn:g3.ge:dea:call:SendDocument:v1">................</Message>
    //     </Body>
    // </GovTalkMessage>

    console.log(xml.GetXml());

    // Canonicalize the XML (using C14N)
    var xdsig = new chilkat.XmlDSig();
    var withComments = false;
    var canonXml = xdsig.CanonicalizeXml(xml.GetXml(),"C14N",withComments);

    // Return the base64 SHA-1 HASH of the canonical XML.
    var crypt = new chilkat.Crypt2();
    crypt.HashAlgorithm = "sha1";
    crypt.EncodingMode = "base64";
    var irmark = crypt.HashStringENC(canonXml);

    console.log("IRMark = " + irmark);

}

chilkatExample();