Java

Download and Trust the DigiCert Global Root CA

See more Certificates Examples

Demonstrates how to download a root certificate and trust it. Chilkat2 Java

import com.chilkatsoft.chilkat2.BinData;
import com.chilkatsoft.chilkat2.Cert;
import com.chilkatsoft.chilkat2.ChilkatException;
import com.chilkatsoft.chilkat2.Http;
import com.chilkatsoft.chilkat2.TrustedRoots;

public class ChilkatExample {

    public static void main(String[] args) {
        // This requires the Chilkat API to have been previously unlocked.
        // See Global Unlock Sample for sample code.

        // In this example, the URLs for the DigiCert root CA certs are available at this web page:
        // https://www.digicert.com/digicert-root-certificates.htm

        // This example downloads the "DigiCert Global Root G3"
        // Valid until: 15/Jan/2038
        // Serial #: 05:55:56:BC:F2:5E:A4:35:35:C3:A4:0F:D5:AB:45:72
        // Thumbprint: 7E04DE896A3E666D00E687D33FFAD93BE83D349E

        String certUrl = "https://dl.cacerts.digicert.com/DigiCertGlobalRootG3.crt";

        Http http = new Http();
        BinData bdCert = new BinData();
        try {
            http.downloadBd(certUrl, bdCert);
        } catch (ChilkatException e) {
            System.out.println(e.getLastErrorText());
            return;
        }

        // Load it into a Chilkat cert object.
        Cert cert = new Cert();
        try {
            cert.loadFromBd(bdCert);
        } catch (ChilkatException e) {
            System.out.println(e.getLastErrorText());
            return;
        }

        // Examine the common name,serial, and thumbprint:
        System.out.println("CN: " + cert.getSubjectCN());
        System.out.println("Serial: " + cert.getSerialNumber());
        System.out.println("Thumbprint: " + cert.getSha1Thumbprint());

        // Output from the above:
        // CN: DigiCert Global Root G3
        // Serial: 055556BCF25EA43535C3A40FD5AB4572
        // Thumbprint: 7E04DE896A3E666D00E687D33FFAD93BE83D349E

        // If desired, the certificate can be saved to a local file so it does not need
        // to be downloaded from the website every time.
        String certPath = "qa_data/certs/DigiCertGlobalRootG3.crt";
        bdCert.writeFile(certPath);

        // To load the cert from a file...
        cert.loadFromFile(certPath);

        // Do the following to add the cert to the collection of trusted roots
        // for this application.  (Note:  The trust is not persisted.  Each time the
        // application runs, it should load the cert (from whatever source, whether it is
        // a file, a database,etc.) and do the following:
        TrustedRoots troots = new TrustedRoots();

        troots.addCert(cert);
        troots.activate();

        System.out.println(cert.getSubjectCN() + " is now trusted for this run of this application.");
    }
}