(PHP ActiveX) Calculate HRMC IRMark

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

Chilkat ActiveX Downloads

ActiveX for 32-bit and 64-bit Windows

Note: The php_com_dotnet.dll may need to be enabled inside of php.ini.

<?php

// 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.
// For versions of Chilkat < 10.0.0, use new COM('Chilkat_9_5_0.Chilkat.Xml')
$xml = new COM("Chilkat.Xml");
$xml->Tag = 'GovTalkMessage';
$xml->AddAttribute('xmlns','http://www.govtalk.gov.uk/CM/envelope');
$xml->UpdateAttrAt('Body|Message',1,'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>

print $xml->getXml() . "\n";

// Canonicalize the XML (using C14N)
// For versions of Chilkat < 10.0.0, use new COM('Chilkat_9_5_0.Chilkat.XmlDSig')
$xdsig = new COM("Chilkat.XmlDSig");
$withComments = 0;
$canonXml = $xdsig->canonicalizeXml($xml->getXml(),'C14N',$withComments);

// Return the base64 SHA-1 HASH of the canonical XML.
// For versions of Chilkat < 10.0.0, use new COM('Chilkat_9_5_0.Chilkat.Crypt2')
$crypt = new COM("Chilkat.Crypt2");
$crypt->HashAlgorithm = 'sha1';
$crypt->EncodingMode = 'base64';
$irmark = $crypt->hashStringENC($canonXml);

print 'IRMark = ' . $irmark . "\n";

?>