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(Node.js) Create XML Digital Signature using HMAC Key

Demonstrates how to create an XML digital signature using an HMAC key.

Install Chilkat for Node.js and Electron using npm at

Chilkat npm packages for Node.js

Chilkat npm packages for Electron

on Windows, Linux, MacOSX, and ARM

var os = require('os');
if (os.platform() == 'win32') {  
    if (os.arch() == 'ia32') {
        var chilkat = require('@chilkat/ck-node11-win-ia32');
    } else {
        var chilkat = require('@chilkat/ck-node11-win64'); 
    }
} else if (os.platform() == 'linux') {
    if (os.arch() == 'arm') {
        var chilkat = require('@chilkat/ck-node11-arm');
    } else if (os.arch() == 'x86') {
        var chilkat = require('@chilkat/ck-node11-linux32');
    } else {
        var chilkat = require('@chilkat/ck-node11-linux64');
    }
} else if (os.platform() == 'darwin') {
    var chilkat = require('@chilkat/ck-node11-macosx');
}

function chilkatExample() {

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

    // Signs the following XML using an HMAC key.

    // <?xml version="1.0" encoding="UTF-8" standalone="no"?>
    // <collection Id="root">
    // 	<album>
    // 		<title>Questions, unanswered</title>
    // 		<artist>Steve and the flubberblubs</artist>
    // 		<year>1989</year>
    // 		<t:tracks xmlns:t="http://test.xades4j/tracks">
    // 			<t:song length="4:05" tracknumber="1">
    // 				<t:title>What do you know?</t:title>
    // 				<t:artist>Steve and the flubberblubs</t:artist>
    // 				<t:lastplayed>2006-10-17-08:31</t:lastplayed>
    // 			</t:song>
    // 			<t:song length="3:45" tracknumber="2">
    // 				<t:title>Who do you know?</t:title>
    // 				<t:artist>Steve and the flubberblubs</t:artist>
    // 				<t:lastplayed>2006-10-17-08:35</t:lastplayed>
    // 			</t:song>
    // 			<t:song length="5:14" tracknumber="3">
    // 				<t:title>When do you know?</t:title>
    // 				<t:artist>Steve and the flubberblubs</t:artist>
    // 				<t:lastplayed>2006-10-17-08:39</t:lastplayed>
    // 			</t:song>
    // 			<t:song length="4:19" tracknumber="4">
    // 				<t:title>Do you know?</t:title>
    // 				<t:artist>Steve and the flubberblubs</t:artist>
    // 				<t:lastplayed>2006-10-17-08:44</t:lastplayed>
    // 			</t:song>
    // 		</t:tracks>
    // 	</album>
    // </collection>
    // 

    // The above XML is available at https://www.chilkatsoft.com/exampleData/flubberblub.xml
    // Fetch the XML and then sign it..

    var url = "https://www.chilkatsoft.com/exampleData/flubberblub.xml";
    var http = new chilkat.Http();
    var sbXml = new chilkat.StringBuilder();
    var success = http.QuickGetSb(url,sbXml);
    if (success !== true) {
        console.log(http.LastErrorText);
        return;
    }

    var xmlSigGen = new chilkat.XmlDSigGen();

    // The Signature will be inserted under the "collection" element.
    xmlSigGen.SigLocation = "collection";

    // Sign everything in <collection Id="root"> ... </collection>
    xmlSigGen.AddSameDocRef("root","sha256","C14N","","");

    // Specify the HMAC key.
    // For example, if the HMAC key is to be the us-ascii bytes of the string "secret",
    // the HMAC key can be set in any of the following ways (and also more ways not shown here..)
    xmlSigGen.SetHmacKey("secret","ascii");
    // or
    xmlSigGen.SetHmacKey("c2VjcmV0","base64");
    // or
    xmlSigGen.SetHmacKey("736563726574","hex");

    // Sign the XML..
    success = xmlSigGen.CreateXmlDSigSb(sbXml);
    if (success !== true) {
        console.log(xmlSigGen.LastErrorText);
        return;
    }

    // Examine the signed XML:
    console.log(sbXml.GetAsString());

    // The output is:
    // 
    // <?xml version="1.0" encoding="UTF-8" standalone="no"?>
    // <collection Id="root">
    // 	<album>
    // 		<title>Questions, unanswered</title>
    // 		<artist>Steve and the flubberblubs</artist>
    // 		<year>1989</year>
    // 		<t:tracks xmlns:t="http://test.xades4j/tracks">
    // 			<t:song length="4:05" tracknumber="1">
    // 				<t:title>What do you know?</t:title>
    // 				<t:artist>Steve and the flubberblubs</t:artist>
    // 				<t:lastplayed>2006-10-17-08:31</t:lastplayed>
    // 			</t:song>
    // 			<t:song length="3:45" tracknumber="2">
    // 				<t:title>Who do you know?</t:title>
    // 				<t:artist>Steve and the flubberblubs</t:artist>
    // 				<t:lastplayed>2006-10-17-08:35</t:lastplayed>
    // 			</t:song>
    // 			<t:song length="5:14" tracknumber="3">
    // 				<t:title>When do you know?</t:title>
    // 				<t:artist>Steve and the flubberblubs</t:artist>
    // 				<t:lastplayed>2006-10-17-08:39</t:lastplayed>
    // 			</t:song>
    // 			<t:song length="4:19" tracknumber="4">
    // 				<t:title>Do you know?</t:title>
    // 				<t:artist>Steve and the flubberblubs</t:artist>
    // 				<t:lastplayed>2006-10-17-08:44</t:lastplayed>
    // 			</t:song>
    // 		</t:tracks>
    // 	</album>
    // <ds:Signature xmlns:ds="http://www.w3.org/2000/09/xmldsig#"><ds:SignedInfo><ds:CanonicalizationMethod Algorithm="http://www.w3.org/2001/10/xml-exc-c14n#"/><ds:SignatureMethod Algorithm="http://www.w3.org/2001/04/xmldsig-more#hmac-sha256"/><ds:Reference URI="#root"><ds:Transforms><ds:Transform Algorithm="http://www.w3.org/2000/09/xmldsig#enveloped-signature"/></ds:Transforms><ds:DigestMethod Algorithm="http://www.w3.org/2001/04/xmlenc#sha256"/><ds:DigestValue>rD/g8soqKz8EiPUBhEWfcQacS0ta4ULHX3dKMEH6ZoQ=</ds:DigestValue></ds:Reference></ds:SignedInfo><ds:SignatureValue>R8dXP95VRYJBfL6d0Peogybdk27+R+JIfX8jnVu0NOI=</ds:SignatureValue></ds:Signature></collection>
    // 

}

chilkatExample();

 

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