Bare-bones code to interface with PCSCD / NFC readers

pcsc

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

// VARIATION OF:
//  http://ludovicrousseau.blogspot.com/2010/06/pcsc-sample-in-java.html

// The included commands are specific to acr122u reader / writer for Mifare Classic 1k tags

public class pcsc {
    public static void main(String[] args) {
        try {
            TerminalFactory factory = TerminalFactory.getDefault();
            List<CardTerminal> terminals = factory.terminals().list();

            CardTerminal terminal = terminals.get(0);

            if(terminal.waitForCardPresent(5000)){
                Card card = terminal.connect("*");
                CardChannel channel = card.getBasicChannel();

                // AUTH
                byte[] blah = {(byte)0xff, (byte)0x86, 0x00, 0x00, 0x05, 0x01, 0x00, 0x04, 0x60, 0x00};
                ResponseAPDU answer = channel.transmit(new CommandAPDU(blah));

                /*
                      // WRITE
                      byte[] blah2 = {(byte)0xFF, (byte)0xD6, 0x00, 0x04, 0x10, 0x09, 0x03, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0A, 0x0B, 0x0C, 0x0D, 0x0E, (byte)0x0E, 0x01};
                      answer = channel.transmit(new CommandAPDU(blah2));
                */

                // READ
                byte[] blah3 = {(byte)0xff, (byte)0xB0, 0x00, 0x04, 0x10};
                answer = channel.transmit(new CommandAPDU(blah3));

                System.out.println("answer: " + answer.toString());
                byte r[] = answer.getData();
                //System.out.print(r);
                for(int i=0;i<r.length;i++){
                    System.out.print(String.valueOf(r[i])+" ");
                }
                System.out.println();

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