How can I share Pin variable between two packages?

Question

Hi every one,
Is there any one who knows how can I share Pin variable that it is defined with OwnerPin between two packages in java card( with eclipse 3.1),I studied Sharing Interface subject and I knows it teorical but I can not do it practical .
I can share primitive data type but I can not share Ownerpin.
If anybody has some sample codes or knows any link ,please inform me.
My code is same as below:
//In Server Side
package ginaPack;
import javacard.framework.*;
public class GinaApplet extends Applet implements GinaInterface{
OwnerPIN pin;
private GinaApplet (byte[] bArray,short bOffset,byte bLength) {
    pin =new OwnerPIN(PIN_TRY_LIMIT,MAX_PIN_SIZE);
          byte PinTemp[] = new byte[4];
          PinTemp[0] = (byte) 0x31;
          PinTemp[1] = (byte) 0x31;
          PinTemp[2] = (byte) 0x31;
          PinTemp[3] = (byte) 0x31;
          pin.update(PinTemp, (short) (0), (byte) PinTemp.length);       
    public Shareable getShareableInterfaceObject(AID clientAID,byte parameter)
          return  this;
    public OwnerPIN getPinShareable()
         return pin;         
     public void process(APDU apdu)
                  //there are some codes in this here
}//Interface in Server side
public interface GinaInterface extends Shareable
      public OwnerPIN getPinShareable();
}//In Client side
import ginaPack.*;
public class UserCardApplet extends Applet {
private UserCardApplet(byte[] bArray, short bOffset, byte bLength) {
     //there are some codes in this here
public boolean select() {
          final byte[] Gina_AID={(byte)0x47,(byte)0x69,(byte)0x6e,(byte)0x61,(byte)0x41,(byte)0x70,(byte)0x70,(byte)0x6c,(byte)0x65,(byte)0x74};
          AID GinaAID = JCSystem.lookupAID( Gina_AID, ( short )0,( byte )Gina_AID.length );
          if ( GinaAID == null ) // probably not loaded on card
                    ISOException.throwIt( ISO7816.SW_FUNC_NOT_SUPPORTED );//6a 80
          GinaInterface ff = (GinaInterface) JCSystem.getAppletShareableInterfaceObject(GinaAID,(byte)0);
          if( ff == null )
               ISOException.throwIt((short)0x0903);
if ( ff.getPinShareable().getTriesRemaining()== 0 ) return false;
}My problem is in this line :
"if ( ff.getPinShareable().getTriesRemaining()== 0 ) return false; "when I select my applet this line throw an exception, ff.getPinshareable includes all of OwnerPin methods(such as getTriesRemaining ,check ,reset, update ,...)but all of them throw exception .
I think firewal does not allow other packages uses this methods .If my guess is right then what should I do for sharing the variables that they are defined with non primitive data type such as (OwnerPin,Signature,...)
I'd appriciated for any help.
yours sincerely,
Orchid.
Message was edited by:
NewOrchid

Answer 1

Applet 1:
package com.package1;
import javacard.framework.*;
public class Applet1 extends Applet {
    private static final byte tryLimit  = (byte)3;
    private static byte[] pinBytes = {(byte)1, (byte)7, (byte)4, (byte)5, (byte)2};
    private Library1 lib;
    protected Applet1(byte bArray[], short bOffset, byte bLength) throws PINException {
        lib= new Library1(tryLimit, (byte)pinBytes.length);
        lib.update(pinBytes, (short)0, (byte)pinBytes.length);
        register();
    public static void install(byte[] bArray, short bOffset, byte bLength) {
        new Applet1(bArray, bOffset, bLength);
    public void process(APDU apdu) {
        byte status=(byte)0;
        lib.resetAndUnblock();
        if (!(lib instanceof Shareable)) status += (byte)2;
        if (!(lib instanceof MyPIN)) status += (byte)4;
        ISOException.throwIt(Util.makeShort((byte)0x90, status)); // sw indicates tries remaining
    public Shareable getShareableInterfaceObject(AID cltAID, byte parm) {
        return lib;
}Library1:
package com.package1;
import javacard.framework.OwnerPIN;
import javacard.framework.PINException;
public class Library1 extends OwnerPIN implements Interface1{
    public Library1(byte tryLimit, byte maxPINSize) throws PINException {
        super(tryLimit, maxPINSize);
}Interface1:
package com.package1;
import javacard.framework.PIN;
import javacard.framework.Shareable;
public interface Interface1 extends Shareable {
    boolean check(byte[] pin, short offset, byte length);
    byte getTriesRemaining();
    boolean isValidated();
    void reset();
}Applet2:
package com.package2;
import javacard.framework.*;
import com.package1;
public class Applet2 extends Applet {
    private final static byte CLA_TEST = (byte)0x80;  
    private final static byte INS_TEST = (byte)0x20;
    private final static byte P1_AUTHORIZE = (byte)0x00;
    private final static byte P1_DOIT = (byte)0x01;
    private final static byte P1_CHECK_SIO = (byte)0x0a;
    private Interface1 sio;
    protected Applet2(byte bArray[], short bOffset, byte bLength) {
        register();
    public static void install(byte[] bArray, short bOffset, byte bLength) {
        new Applet2(bArray, bOffset, bLength);
    public void process(APDU apdu) {
     byte[] buffer = apdu.getBuffer();
        if ((buffer[ISO7816.OFFSET_CLA] == CLA_TEST) ||
            (buffer[ISO7816.OFFSET_CLA] == ISO7816.CLA_ISO7816)) {
            short bytesReceived = apdu.setIncomingAndReceive();
            switch (buffer[ISO7816.OFFSET_INS]) {
            case ISO7816.INS_SELECT:
                if (!JCSystem.getAID().equals(buffer, ISO7816.OFFSET_CDATA, buffer[ISO7816.OFFSET_LC]))
                    ISOException.throwIt(ISO7816.SW_APPLET_SELECT_FAILED);
                sio = (Library1)JCSystem.getAppletShareableInterfaceObject(JCSystem.lookupAID(<fill in parameters>);
                if (sio == null)
                    ISOException.throwIt(ISO7816.SW_CONDITIONS_NOT_SATISFIED);            
                break;
            case INS_TEST:
                switch (buffer[ISO7816.OFFSET_P1]) {
                case P1_AUTHORIZE:
                    if (!sio.isValidated()) {
                        if(!sio.check(buffer, ISO7816.OFFSET_CDATA, buffer[ISO7816.OFFSET_LC]))
                            ISOException.throwIt(Util.makeShort((byte)0x9A, sio.getTriesRemaining()));
                    break;
                case P1_DOIT:
                    if (!sio.isValidated())
                        ISOException.throwIt(ISO7816.SW_SECURITY_STATUS_NOT_SATISFIED);
                    sio.reset();
                    ISOException.throwIt(Util.makeShort((byte)0x9A, sio.getTriesRemaining()));                
                    break;
                default:
                    ISOException.throwIt(ISO7816.SW_INCORRECT_P1P2);                   
                break;
            default:
                ISOException.throwIt(ISO7816.SW_INS_NOT_SUPPORTED);
        else {
            ISOException.throwIt(ISO7816.SW_CLA_NOT_SUPPORTED);
}1. Upload package1
2. Install Applet1
3. Select Applet1
4. Upload package2
5. Install Applet2
6. Select Applet2