Tuesday, June 22, 2010

PCSC sample in Java

Here is the PCSC sample in Java language I promised in PC/SC sample in different languages.


Since Java 1.6 the JRE includes the package javax.smartcardio which was defined in the JSR 268. No need to compile additional source code.

For the example I used Eclipse Galileo and the Java 1.6 provided by Apple on a Mac OS X Snow Leopard (10.6.4).

Source code

import java.util.List;
import javax.smartcardio.*;

public class Blog {
 public static void main(String[] args) {
  try {
   // Display the list of terminals
   TerminalFactory factory = TerminalFactory.getDefault();
   List<CardTerminal> terminals = factory.terminals().list();
   System.out.println("Terminals: " + terminals);

   // Use the first terminal
   CardTerminal terminal = terminals.get(0);

   // Connect wit hthe card
   Card card = terminal.connect("*");
   System.out.println("card: " + card);
   CardChannel channel = card.getBasicChannel();

   // Send Select Applet command
   byte[] aid = {(byte)0xA0, 0x00, 0x00, 0x00, 0x62, 0x03, 0x01, 0x0C, 0x06, 0x01};
   ResponseAPDU answer = channel.transmit(new CommandAPDU(0x00, 0xA4, 0x04, 0x00, aid));
   System.out.println("answer: " + answer.toString());

   // Send test command
   answer = channel.transmit(new CommandAPDU(0x00, 0x00, 0x00, 0x00));
   System.out.println("answer: " + answer.toString());
   byte r[] = answer.getData();
   for (int i=0; i<r.length; i++)

   // Disconnect the card
  } catch(Exception e) {
   System.out.println("Ouch: " + e.toString());


Terminals: [PC/SC terminal Gemplus GemPC Twin 00 00]
card: PC/SC card in Gemplus GemPC Twin 00 00, protocol T=1, state OK
answer: ResponseAPDU: 2 bytes, SW=9000
answer: ResponseAPDU: 14 bytes, SW=9000
Hello world!


Nothing special to add. The major advantage here is that the wrapper is included in the runtime. So you do not have to install much on a system before you can use your program, just the JRE :-)

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