(JavaScript) Decrypt a govtalk.gov.uk SOAP GovTalkMessage
Demonstrates how to decrypt the content contained in the XML of a GovTalkMessage SOAP response.
var success = false;
// This example assumes the Chilkat API to have been previously unlocked.
// See Global Unlock Sample for sample code.
// The GovTalkMessage response looks something like this:
// <?xml version="1.0" encoding="utf-8"?>
// <GovTalkMessage xmlns="http://www.govtalk.gov.uk/CM/envelope">
// <EnvelopeVersion>3.1</EnvelopeVersion>
// <Header>
// <MessageDetails>
// <Class>CSSZ_DZDPN</Class>
// <Qualifier>request</Qualifier>
// <Function>submit</Function>
// <TransactionID />
// <AuditID />
// <CorrelationID>aaaaa</CorrelationID>
// <ResponseEndPoint PollInterval="0" />
// <Transformation>XML</Transformation>
// <GatewayTest />
// <GatewayTimestamp />
// </MessageDetails>
// <SenderDetails>
// <IDAuthentication>
// <SenderID />
// <Authentication>
// <Method>clear</Method>
// <Role />
// <Value />
// </Authentication>
// </IDAuthentication>
// <X509Certificate />
// <EmailAddress>somebody@example.com</EmailAddress>
// </SenderDetails>
// </Header>
// <GovTalkDetails>
// <Keys>
// <Key Type="vars">9999999999</Key>
// </Keys>
// <GatewayAdditions>
// <Source>VREP</Source>
// </GatewayAdditions>
// </GovTalkDetails>
// <Body>
// <Message xmlns="http://www.cssz.cz/XMLSchema/envelope" version="1.2" eType="DZDPN20">
// <Header>
// <Signature xmlns:dt="urn:schemas-microsoft-com:datatypes" dt:dt="bin.base64">MIIJ0A ... UMw=
// </Signature>
// <Vendor productName="some product name" version="2019" />
// </Header>
// <Body xmlns:dt="urn:schemas-microsoft-com:datatypes" encrypted="yes" contentEncoding="gzip" dt:dt="bin.base64">MIIF2w ... N2vW</Body>
// </Message>
// </Body>
// </GovTalkMessage>
// We want to get the content of the Body and decrypt it.
// First, let's get the content of the Body XML element, which is a base64 string starting with MIIF2w...
var xml = new CkXml();
success = xml.LoadXmlFile("qa_data/xml/govTalkMessageResponse.xml");
if (success == false) {
console.log(xml.LastErrorText);
return;
}
var Body = xml.GetChildContent("Body|Message|Body");
console.log(Body);
var cert = new CkCert();
success = cert.LoadPfxFile("qa_data/pfx/govTalkMessage_aaa.pfx","aaa");
if (success == false) {
console.log(cert.LastErrorText);
return;
}
var crypt = new CkCrypt2();
crypt.CryptAlgorithm = "pki";
success = crypt.SetDecryptCert(cert);
if (success == false) {
console.log(crypt.LastErrorText);
return;
}
var bd = new CkBinData();
// Append the bytes to bd.
success = bd.AppendEncoded(Body,"base64");
// Decrypt in-place.
success = crypt.DecryptBd(bd);
if (success == false) {
console.log(crypt.LastErrorText);
return;
}
// Save the decrypted data to a file.
success = bd.WriteFile("qa_output/out.dat");
// If the decrypted data is non-text (binary) then we can examine it in an encoding, such as hex:
console.log("Decrypted bytes as hex: " + bd.GetEncoded("hex"));
|
