(Node.js) Get Certificate User Principal Name (UPN)

See more Certificates Examples

Note: This example requires Chilkat v9.5.0.90 or greater due to fixes made in getting the UPN from the SAN.

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() {

    var cert = new chilkat.Cert();

    var success = cert.LoadFromFile("qa_data/certs/sample.cer");
    if (success == false) {
        console.log(cert.LastErrorText);
        return;
    }

    var xml = new chilkat.Xml();
    xml.LoadXml(cert.SubjectAlternativeName);
    console.log(xml.GetXml());

    // A certificate with a User Principal Name in the SAN might have this:

    // <SubjectAltName>
    //     <rfc822Name>joe@example.com</rfc822Name>
    //     <name type="oid" oid="1.3.6.1.4.1.311.20.2.3">joe@example.com</name>
    // </SubjectAltName>

    // The OID 1.3.6.1.4.1.311.20.2.3 is for the User Principal Name.
    var upn = xml.ChilkatPath("/A/name,oid,1.3.6.1.4.1.311.20.2.3|*");
    if (xml.LastMethodSuccess == false) {
        console.log("No user principle name.");
    }
    else {
        console.log("User Principle Name = " + upn);
    }


}

chilkatExample();