(Node.js) Verify XML Digital Signature

Verifies XML signatures in an XML file.

Install Chilkat for Node.js and Electron using npm at Chilkat npm packages for Node.js Chilkat npm packages for Electron on Windows, Linux, MacOS

var os = require('os');
if (os.platform() == 'win32') {  
  var chilkat = require('@chilkat/ck-node23-win64'); 
} else if (os.platform() == 'linux') {
    if (os.arch() == 'arm') {
        var chilkat = require('@chilkat/ck-node23-linux-arm');
    } else if (os.arch() == 'arm64') {
        var chilkat = require('@chilkat/ck-node23-linux-arm64');
    } else {
        var chilkat = require('@chilkat/ck-node23-linux-x64');
    }
} else if (os.platform() == 'darwin') {
  var chilkat = require('@chilkat/ck-node23-mac-universal');
}

function chilkatExample() {

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

    var sbXml = new chilkat.StringBuilder();
    var success = sbXml.LoadFile("qa_data/xml_dsig_verify/csioz_sample.xml","utf-8");
    if (success !== true) {
        console.log("Failed to load XML file.");
        return;
    }

    var dsig = new chilkat.XmlDSig();

    // First load the XML containing the signatures to be verified.
    success = dsig.LoadSignatureSb(sbXml);
    if (success !== true) {
        console.log(dsig.LastErrorText);
        return;
    }

    // It's possible that an XML document can contain multiple signatures.
    // Each can be verified as follows:
    var i = 0;
    while (i < dsig.NumSignatures) {
        // Select the Nth signature by setting the Selector property.
        dsig.Selector = i;

        // The bVerifyReferenceDigests argument determines if we want
        // to also verify each reference digest.  If set to false,
        // then only the SignedInfo part of the Signature is verified.
        var bVerifyReferenceDigests = true;
        var bVerified = dsig.VerifySignature(bVerifyReferenceDigests);
        console.log("Signature " + (i+1) + " verified = " + bVerified);

        i = i+1;
    }


}

chilkatExample();