通过USB连接的APDU

Question

我想创建一个android应用程序来查找我的micro-usb (智能卡读取设备)，所以我在接收智能卡中的数据时遇到了问题(我发送了一个APDU是0x...方法usbDeviceConnection.bulkTransfer添加到智能卡中。但我不知道如何接收数据或应答的东西(它必须在我发送命令后将卡中的数据应答给我)。当它回答时，我如何编码或将十六进制转换为字符串？

我想，(参考代码)我有一个2端点，所以我对endpointIn和endpointOut有疑问。这些参数是什么？如何使用它在设备和应用之间发送和接收数据？我觉得对不对？BroadcastReceiver是做什么的？

protected void onCreate(Bundle savedInstanceState) {
   super.onCreate(savedInstanceState);
  setContentView(R.layout.activity_main);
   tv = (TextView) findViewById(R.id.textview);   
   //register the broadcast receiver
   mPermissionIntent = PendingIntent.getBroadcast(this, 0, new Intent(ACTION_USB_PERMISSION), 0);
  IntentFilter filter = new IntentFilter(ACTION_USB_PERMISSION);
  registerReceiver(mUsbReceiver, filter);

  registerReceiver(mUsbDeviceReceiver, new IntentFilter(UsbManager.ACTION_USB_DEVICE_ATTACHED));
  registerReceiver(mUsbDeviceReceiver, new IntentFilter(UsbManager.ACTION_USB_DEVICE_DETACHED));

  connectUsb();
}

下面是connectUSB方法。

private void connectUsb() {
  Toast.makeText(MainActivity.this,
   "connectUsb()",
  Toast.LENGTH_LONG).show();


  searchEndPoint();

   if (usbInterfaceFound != null) {
  setupUsbComm();

   threadUsbTx = new ThreadUsbTx(usbDeviceConnection, endpointOut);
   threadUsbTx.start();

   //bytes are APDU to send for get data from card.
   threadUsbTx.insertCmd(
   new byte[]{(byte) 0xA0, (byte) 0xA4, 0x00, 0x00, 0x02, 0x3F, 0x00});
   threadUsbTx.insertCmd(
   new byte[]{(byte)0x80, (byte)0xb0, 0x00, 0x04, 0x02, 0x00, 0x0d});
   threadUsbTx.insertCmd(
   new byte[]{0x00, (byte)0xc0, 0x00, 0x00, 0x0d});
   }
  }

这是类ThreadUsbTx..

class ThreadUsbTx extends Thread {
   boolean running;

  UsbDeviceConnection txConnection;
  UsbEndpoint txEndpoint;
  Queue<byte[]> cmdQueue;
   byte[] cmdToSent;


  ThreadUsbTx(UsbDeviceConnection conn, UsbEndpoint endpoint) {
   txConnection = conn;
   txEndpoint = endpoint;
   cmdQueue = new LinkedList<byte[]>();
   cmdToSent = null;

   running = true;
  }

   public void setRunning(boolean r) {
   running = r;
  }

   public void insertCmd(byte[] cmd) {
   synchronized (cmdQueue) {
   cmdQueue.add(cmd);
  }
  }

   @Override
   public void run() {

   while (running) {

   synchronized (cmdQueue) {
   if (cmdQueue.size() > 0) {
   cmdToSent = cmdQueue.remove();
  }
  }

   if (cmdToSent != null) {

   final int usbResult = usbDeviceConnection.bulkTransfer(
   txEndpoint,
   cmdToSent,
   cmdToSent.length,
   0);

   final String s = new String(cmdToSent);
  String result = null;

   try {
  result = new String(cmdToSent,"TIS620"); // To Thai language
  } catch (UnsupportedEncodingException e) {
  e.printStackTrace();
  }

   final String finalResult = result;
  runOnUiThread(new Runnable() {

   @Override
   public void run() {
  Toast.makeText(MainActivity.this,
   finalResult+" "+String.format("%040x",cmdToSent),
  Toast.LENGTH_LONG).show();
  }
  });
   cmdToSent = null;
   }
  }
  }
  }

Answer 1

与USB卡读卡器通信的最佳方式是将符合CCID的读卡器与支持OTG的电话一起使用。看看Playstore中的App "CCID Reader应用程序演示“。同样有用的the library可用here。否则，您必须在代码中实现或多或少的CCID行为