(JavaScript) Calculate HRMC IRMark
Demonstrates how to calculate an IRmark for an HMRC GovTalkMessage XML document.
// 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 CkXml();
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 CkXmlDSig();
var withComments = false;
var canonXml = xdsig.CanonicalizeXml(xml.GetXml(),"C14N",withComments);
// Return the base64 SHA-1 HASH of the canonical XML.
var crypt = new CkCrypt2();
crypt.HashAlgorithm = "sha1";
crypt.EncodingMode = "base64";
var irmark = crypt.HashStringENC(canonXml);
console.log("IRMark = " + irmark);
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