Java

Get Certificate User Principal Name (UPN)

See more Certificates Examples

Demonstrates how to get a certificate's UPN from the SAN (Subject Alternative Name). Most certificates do not have a UPN. This example only applies to those certificates that have a User Principal Name.

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

Chilkat2 Java

import com.chilkatsoft.chilkat2.Cert;
import com.chilkatsoft.chilkat2.ChilkatException;
import com.chilkatsoft.chilkat2.Xml;

public class ChilkatExample {

    public static void main(String[] args) {
        Cert cert = new Cert();

        try {
            cert.loadFromFile("qa_data/certs/sample.cer");
        } catch (ChilkatException e) {
            System.out.println(e.getLastErrorText());
            return;
        }

        Xml xml = new Xml();
        xml.loadXml(cert.getSubjectAlternativeName());
        System.out.println(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.
        String upn = null;
        try {
            upn = xml.chilkatPath("/A/name,oid,1.3.6.1.4.1.311.20.2.3|*");
            System.out.println("User Principle Name = " + upn);
        } catch (ChilkatException e) {
            System.out.println("No user principle name.");
        }
    }
}