Android™

PKCS11 Find All Certificates on Smart Card or USB Token

See more PKCS11 Examples

Sample code showing how to examine all the certificates on a smart card or USB token.

Note: This example requires Chilkat v9.5.0.88 or later.

Android™

// Important: Don't forget to include the call to System.loadLibrary
// as shown at the bottom of this code sample.
package com.test;

import android.app.Activity;
import com.chilkatsoft.*;

import android.widget.TextView;
import android.os.Bundle;

public class SimpleActivity extends Activity {

  private static final String TAG = "Chilkat";

  // Called when the activity is first created.
  @Override
  public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    boolean success = false;

    // 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.

    CkPkcs11 pkcs11 = new CkPkcs11();

    // Set your shared lib path -- either a full path to the DLL, .so, or .dylib,
    // or just the filename if the driver is in a location that can be automatically found. (Such as in C:\Windows\System32)
    pkcs11.put_SharedLibPath("aetpkss1.dll");

    success = pkcs11.Initialize();
    if (success == false) {
        Log.i(TAG, pkcs11.lastErrorText());
        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;
    success = pkcs11.OpenSession(slotID,readWrite);
    if (success == false) {
        Log.i(TAG, pkcs11.lastErrorText());
        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";
    success = pkcs11.Login(userType,pin);
    if (success == false) {
        Log.i(TAG, pkcs11.lastErrorText());
        success = pkcs11.CloseSession();
        return;
        }

    // Call FindAllCerts to find all certificates on the smart card or USB token.
    success = pkcs11.FindAllCerts();
    if (success == false) {
        Log.i(TAG, pkcs11.lastErrorText());
        success = pkcs11.CloseSession();
        return;
        }

    // The NumCerts property is set by FindAllCerts.
    int numCerts = pkcs11.get_NumCerts();
    Log.i(TAG, "Number of certs: " + String.valueOf(numCerts));

    String privateKeyNote;
    CkCert cert = new CkCert();
    int i = 0;
    while (i < numCerts) {
        pkcs11.GetCert(i,cert);
        privateKeyNote = "";
        if (cert.HasPrivateKey() == true) {
            privateKeyNote = "(has private key)";
            }

        Log.i(TAG, String.valueOf(i) + ": " + privateKeyNote + " " + cert.subjectDN());
        Log.i(TAG, String.valueOf(i) + ": issuer: " + cert.issuerDN());
        Log.i(TAG, "----");
        i = i + 1;
        }

    // Revert to an unauthenticated session by calling Logout.
    success = pkcs11.Logout();
    if (success == false) {
        Log.i(TAG, pkcs11.lastErrorText());
        success = 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).
    success = pkcs11.CloseSession();
    if (success == false) {
        Log.i(TAG, pkcs11.lastErrorText());
        return;
        }

    Log.i(TAG, "Success.");

  }

  static {
      System.loadLibrary("chilkat");

      // Note: If the incorrect library name is passed to System.loadLibrary,
      // then you will see the following error message at application startup:
      //"The application <your-application-name> has stopped unexpectedly. Please try again."
  }
}