Java

PKCS11 Find Certificate with Key Usage on Smart Card or USB Token

See more PKCS11 Examples

Demonstrates how to find and return the 1st certificate on a smart card or USB token with a desired intended key usage.

Note: This example requires Chilkat v9.5.0.91 or later.

Chilkat2 Java

import com.chilkatsoft.chilkat2.Cert;
import com.chilkatsoft.chilkat2.ChilkatException;
import com.chilkatsoft.chilkat2.Pkcs11;

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.

        // Note: Chilkat's PKCS11 implementation runs on Windows, Linux, Mac OS X, and other supported operating systems.

        Pkcs11 pkcs11 = new Pkcs11();

        pkcs11.setSharedLibPath("aetpkss1.dll");

        try {
            pkcs11.initialize();
        } catch (ChilkatException e) {
            System.out.println(e.getLastErrorText());
            return;
        }

        // Pass -1 for the slotID to open a session on the first non-empty slot.
        int slotID = -1;

        // Open a session.
        boolean readWrite = true;
        try {
            pkcs11.openSession(slotID, readWrite);
        } catch (ChilkatException e) {
            System.out.println(e.getLastErrorText());
            return;
        }

        // Make it an authenticated session by calling Login.
        //
        // If we don't authenticate, then we won't be able to see the private keys, and thus
        // we won't know which certificates have an associated private key stored on the smart card.

        // The smart card PIN is passed to the Login method.
        // userType 1 indicates a "Normal User".
        int userType = 1;
        String pin = "0000";
        try {
            pkcs11.login(userType, pin);
        } catch (ChilkatException e) {
            System.out.println(e.getLastErrorText());
            pkcs11.closeSession();
            return;
        }

        // --------------------------------------------------------------------------

        Cert cert = new Cert();

        // Find a certificate with an intended key usage.
        // Possible key usages to find are:
        //
        // DigitalSignature
        // NonRepudiation
        // KeyEncipherment
        // DataEncipherment
        // CertificateSigning
        // CrlSigning
        //
        // To find a cert having any one of several usages, pass a comma-separated list of usages:
        try {
            pkcs11.findCert("keyUsage", "NonRepudiation,DigitalSignature", cert);
            System.out.println("Cert with private key: " + cert.getSubjectCN());
        } catch (ChilkatException e) {
            System.out.println("No certificates having the intended key usage were found.");
        }

        // --------------------------------------------------------------------------

        // Revert to an unauthenticated session by calling Logout.
        try {
            pkcs11.logout();
        } catch (ChilkatException e) {
            System.out.println(e.getLastErrorText());
            pkcs11.closeSession();
            return;
        }

        // When finished, close the session.
        // It is important to close the session (memory leaks will occur if the session is not properly closed).
        try {
            pkcs11.closeSession();
        } catch (ChilkatException e) {
            System.out.println(e.getLastErrorText());
            return;
        }

        System.out.println("Success.");
    }
}