OpenCard Framework Application Development
by Vesna Hassler and Oliver Fodor


Listing One
OpenCard.services = samples.simplestring.SimpleStringCardServiceFactory
OpenCard.terminals = dk.itplus.smartcard.terminal.litronic210.
                     LitronicCardTerminalFactory|Litronic210|Litronic210|COM1 

Listing Two
private void setString(APDU apdu)
{
        buffer = apdu.getBuffer();
        // receive data from terminal
        byte size = (byte)(apdu.setIncomingAndReceive());
        byte index;
        TheBuffer[0] = size;
        // store string and its length
        Util.arrayCopy(buffer, ISO.OFFSET_CDATA, TheBuffer, 
                                                   (short)1, (short)size);
        return;
}


Listing Three
private void getString(APDU apdu) {
        buffer = apdu.getBuffer();
        byte numBytes = buffer[ISO.OFFSET_LC];
        if (numBytes == 0)
        ISOException.throwIt((short)(SW_WRONG_LENGTH + TheBuffer[0]));
        apdu.setOutgoing();
        apdu.setOutgoingLength(numBytes);
        Util.arrayCopy(TheBuffer,(short)1,buffer,(short)0,(short)numBytes);
        apdu.sendBytes((short)0,(short)numBytes);
        return;
}


Listing Four
public void selectApplet() throws CardServiceException
{
    try
    {
        allocateCardChannel();
        sendAPDU(selectRoot);
        sendAPDU(selectApp);
    } catch(Exception e)
    {
        e.printStackTrace();
        throw new CardServiceException();
    } finally
    {
        releaseCardChannel();
    }
    appletSelected = true;
    return;


Listing Five
private ResponseAPDU sendAPDU(byte[] apdu) throws CardTerminalException
{
     // Set up the command APDU
     CommandAPDU commandAPDU = new CommandAPDU(apdu);
     ResponseAPDU responseAPDU=getCardChannel().sendCommandAPDU(commandAPDU);
     return (responseAPDU);
}


Listing Six
public SimpleStringCardServiceFactory()
     {
     try {
          cyberFlexCID = new CardID (cyberFlexATR);
     } catch ( Exception e ) {
     }
}


Listing Seven
// register card service with OCF
static {
        services_.addElement(SimpleStringCardService.class);
}


Listing Eight
protected Enumeration cardServiceClasses(CardID cid)
{
    return services_.elements();
}
public boolean knows(CardID cardID)
{
    // check whether the factory knows the smartcard OS
    if (cardID.equals(cyberFlexCID))
    {
         return true;
    } else
    {
         return false;
    }
}


Listing Nine
// initialize OCF
SmartCard.start();
CardRequest cr = new CardRequest(SimpleStringCardService.class);
// wait for card supporting SimpleStringCardService
SmartCard sc = SmartCard.waitForCard(cr);
// instantiate card service
SimpleStringCardService ssp = (SimpleStringCardService)sc.
                        getCardService(SimpleStringCardService.class, true);




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