(Android™) PKCS11 Sign PDF with Smart Card with 2 PINs

See more PKCS11 Examples

Shows how to sign a PDF using a smart card that has one pin for USER, and a 2nd PIN for signing.

Note: This example requires Chilkat v9.5.0.96 or later.

Chilkat Android™ Downloads Android™ Java Libraries Android C/C++ Libraries

// 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);

    // 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();

    pkcs11.put_SharedLibPath("C:/Program Files (x86)/Gemalto/IDGo 800 PKCS#11/IDPrimePKCS1164.dll");

    // --------------------------
    // Provide the user PIN here.
    // --------------------------
    String user_pin = "0000";
    int userType = 1;

    // Establish a PKCS11 logged-on session using the driver (.so, .dylib, or .dll) as specified in the SharedLibPath above.
    boolean success = pkcs11.QuickSession(userType,user_pin);
    if (success == false) {
        Log.i(TAG, pkcs11.lastErrorText());
        return;
        }

    // -----------------------------------------------------------
    // Also indicate the context-specific PIN required for signing.
    // This is a new feature added in Chilkat v9.5.0.97
    // -----------------------------------------------------------
    pkcs11.put_SigContextPin("1234");

    // Get the certificate (on the smart card) that has a private key.
    // There are other ways to locate a certificate on the HSM.
    // This example assumes there is a single certificate w/ private key.
    CkCert cert = new CkCert();
    success = pkcs11.FindCert("privateKey","",cert);
    if (success == true) {
        Log.i(TAG, "Cert with private key: " + cert.subjectCN());
        }
    else {
        Log.i(TAG, "No certificates having a private key were found.");
        success = pkcs11.CloseSession();
        return;
        }

    // --------------------------------------------------------------------------
    // At this point, we have the cert to be used for signing.
    // Our PDF signing code is the same as for a cert obtained from any other source..

    CkPdf pdf = new CkPdf();

    // Load a PDF to be signed.
    success = pdf.LoadFile("qa_data/pdf/hello.pdf");
    if (success == false) {
        Log.i(TAG, pdf.lastErrorText());
        success = pkcs11.CloseSession();
        return;
        }

    CkJsonObject json = new CkJsonObject();

    json.UpdateInt("page",1);
    json.UpdateString("appearance.y","top");
    json.UpdateString("appearance.x","left");
    json.UpdateString("appearance.fontScale","10.0");
    json.UpdateString("signingAlgorithm","pss");
    json.UpdateString("hashAlgorithm","sha256");

    int i = 0;
    json.put_I(i);
    json.UpdateString("appearance.text[i]","Digitaly signed by: Xyz Widgets, Inc.");
    i = i + 1;
    json.put_I(i);
    json.UpdateString("appearance.text[i]","current_dt");
    i = i + 1;
    json.put_I(i);
    json.UpdateString("appearance.text[i]","blah blah blah");

    // The certificate is internally linked to the Pkcs11 object, which is currently in an authenticated session.
    success = pdf.SetSigningCert(cert);

    success = pdf.SignPdf(json,"qa_output/out.pdf");
    if (success == false) {
        Log.i(TAG, pdf.lastErrorText());
        success = pkcs11.CloseSession();
        return;
        }

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

    // 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."
  }
}