Java

Load Certificate from Smart Card by Key Usage

See more Certificates Examples

You may have a smartcard or USB token that contains only 2 certificates, one for signing, and one for authentication, and you wish to load the certificate for signing. This example demonstrates how to load the 1st certificate found on a smartcard that matches the intended key usage. Chilkat2 Java

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

public class ChilkatExample {

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

        Cert cert = new Cert();

        // If you know the smart card PIN, set it prior to loading from the smartcard/USB token.
        cert.setSmartCardPin("12345678");

        // To load a certificate matching an intended key usage, specify the type of usage as shown below.
        //
        // The possible key usage keywords are:
        //
        // digitalsignature
        // Use when the public key is used with a digital signature mechanism to support security services other than non-repudiation, certificate signing, or CRL signing.
        // A digital signature is often used for entity authentication and data origin authentication with integrity.

        // nonrepudiation
        // When a digital certificate's key usage includes "nonrepudiation," it implies that the certificate and its associated private key can be used to
        // create digital signatures that provide proof of the origin and integrity of the signed data, and the signer cannot later deny having signed the data.

        // Other less common usages:

        // certificatesigning
        // keyencipherment
        // dataencipherment
        // crlsigning
        // secureemail
        // serverauthentication
        // clientauthentication
        // codesigning
        // timestamping

        try {
            cert.loadFromSmartcard("keyusage=nonrepudiation");
        } catch (ChilkatException e) {
            System.out.println(e.getLastErrorText());
            System.out.println("Certificate not loaded.");
            return;
        }

        System.out.println("Found: " + cert.getSubjectDN() + " serial=" + cert.getSerialNumber());
    }
}