Smartcardio ResponseAPDU buffer size issue?

Question

Greetings All,
I’ve been using the javax.smartcardio API to interface with smart cards for around a year now but I’ve recently come across an issue that may be beyond me. My issue is that I whenever I’m trying to extract a large data object from a smart card, I get a “javax.smartcardio.CardException: Could not obtain response” error.
The data object I’m trying to extract from the card is around 12KB. I have noticed that if I send a GETRESPONSE APDU after this error occurs I get the last 5 KB of the object but the first 7 KB are gone. I do know that the GETRESPONSE dialogue is supposed to be sent by Java in the background where the responses are concatenated before being sent as a ResponseAPDU.
At the same time, I am able to extract this data object from the card whenever I use other APDU tools or APIs, where I have oversight of the GETRESPONSE APDU interactions.
Is it possible that the ResponseAPDU runs into buffer size issues? Is there a known workaround for this? Or am I doing something wrong?
Any help would be greatly appreciated! Here is some code that will demonstrate this behavior:
* test program
import java.io.*;
import java.util.*;
import javax.smartcardio.*;
import java.lang.String;
public class GetDataTest{
    public void GetDataTest(){}
    public static void main(String[] args){
        try{
            byte[] aid = {(byte)0xA0, 0x00, 0x00, 0x03, 0x08, 0x00, 0x00};
            byte[] biometricDataID1 = {(byte)0x5C, (byte)0x03, (byte)0x5F, (byte)0xC1, (byte)0x08};
            byte[] biometricDataID2 = {(byte)0x5C, (byte)0x03, (byte)0x5F, (byte)0xC1, (byte)0x03};
            //get the first terminal
            TerminalFactory factory = TerminalFactory.getDefault();
            List<CardTerminal> terminals = factory.terminals().list();
            CardTerminal terminal = terminals.get(0);
            //establish a connection with the card
            Card card = terminal.connect("*");
            CardChannel channel = card.getBasicChannel();
            //select the card app
            select(channel, aid);
            //verify pin
            verify(channel);
             * trouble occurs here
             * error occurs only when extracting a large data object (~12KB) from card.
             * works fine when used on other data objects, e.g. works with biometricDataID2
             * (data object ~1Kb) and not biometricDataID1 (data object ~12Kb in size)
            //send a "GetData" command
            System.out.println("GETDATA Command");
            ResponseAPDU response = channel.transmit(new CommandAPDU(0x00, 0xCB, 0x3F, 0xFF, biometricDataID1));
            System.out.println(response);
            card.disconnect(false);
            return;
        }catch(Exception e){
            System.out.println(e);
        }finally{
            card.disconnect(false)
    }  

Answer 1

Hello Tapatio,
i was looking for a solution for my problem and i found your post, first i hope your answer
so i am a begginer in card developpement, now am using javax.smartcardio, i can select the file i like to use,
but the problem is : i can't read from it, i don't now exactly how to use hexa code
i'm working with CCID Smart Card Reader as card reader and PayFlex as smart card,
          try {
                      TerminalFactory factory = TerminalFactory.getDefault();
                  List<CardTerminal> terminals = factory.terminals().list();
                  System.out.println("Terminals: " + terminals);
                  CardTerminal terminal = terminals.get(0);
                  if(terminal.isCardPresent())
                       System.out.println("carte presente");
                  else
                       System.out.println("carte absente");
                  Card card = terminal.connect("*");
                 CardChannel channel = card.getBasicChannel();
                 ResponseAPDU resp;
                 // this part select the DF
                 byte[] b = new byte[]{(byte)0x11, (byte)0x00} ;
                 CommandAPDU com = new CommandAPDU((byte)0x00, (byte)0xA4, (byte)0x00, (byte)0x00, b);
                 resp = channel.transmit(com);
                 System.out.println("Result: " + getHexString(resp.getBytes()));
                    //this part select the Data File
                 b = new byte[]{(byte)0x11, (byte)0x05} ;
                 com = new CommandAPDU((byte)0x00, (byte)0xA4, (byte)0x00, (byte)0x00, b);
                 System.out.println("CommandAPDU: " + getHexString(com.getBytes()));
                 resp = channel.transmit(com);
                 System.out.println("Result: " + getHexString(resp.getBytes()));
                 byte[] b1 = new byte[]{(byte)0x11, (byte)0x05} ;
                 com = new CommandAPDU((byte)0x00, (byte)0xB2, (byte)0x00, (byte)0x04, b1, (byte)0x0E); */
                    // the problem is that i don't now how to built a CommandAPDU to read from the file
                 System.out.println("CommandAPDU: " + getHexString(com.getBytes()));
                 resp = channel.transmit(com);
                 System.out.println("Result: " + getHexString(resp.getBytes()));
                  card.disconnect(false);
          } catch (Exception e) {
               System.out.println("error " + e.getMessage());
          }read record : 00 A4 ....
if you know how to do , i'm waiting for your answer