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package org.sufficientlysecure.keychain.smartcard;
import android.app.Activity;
import android.app.PendingIntent;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.hardware.usb.UsbDevice;
import android.hardware.usb.UsbManager;
import org.sufficientlysecure.keychain.Constants;
import org.sufficientlysecure.keychain.util.Log;
import java.util.Collections;
import java.util.HashMap;
import java.util.Set;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.Semaphore;
import java.util.concurrent.atomic.AtomicBoolean;
public class UsbConnectionManager {
private static final String LOG_TAG = UsbConnectionManager.class.getName();
private static final String ACTION_USB_PERMISSION = Constants.PACKAGE_NAME + ".USB_PERMITSSION";
private final Semaphore mRunning = new Semaphore(1);
private final Set<UsbDevice> mProcessedDevices = Collections.newSetFromMap(new ConcurrentHashMap<UsbDevice, Boolean>());
private final AtomicBoolean mStopped = new AtomicBoolean(false);
private Activity mActivity;
private final Thread mWatchThread = new Thread() {
@Override
public void run() {
final UsbManager usbManager = (UsbManager) mActivity.getSystemService(Context.USB_SERVICE);
while (!mStopped.get()) {
try {
mRunning.acquire();
} catch (InterruptedException e) {
}
mRunning.release();
if (mStopped.get()) return;
//
final UsbDevice device = getDevice(usbManager);
if (device != null && !mProcessedDevices.contains(device)) {
mProcessedDevices.add(device);
final Intent intent = new Intent(ACTION_USB_PERMISSION);
IntentFilter filter = new IntentFilter();
filter.addAction(ACTION_USB_PERMISSION);
mActivity.registerReceiver(mUsbReceiver, filter);
Log.d(LOG_TAG, "Requesting permission for " + device.getDeviceName());
usbManager.requestPermission(device, PendingIntent.getBroadcast(mActivity, 0, intent, 0));
}
try {
sleep(1000);
} catch (InterruptedException ignored) {
}
}
}
};
private OnDiscoveredUsbDeviceListener mListener;
/**
* Receives broadcast when a supported USB device is attached, detached or
* when a permission to communicate to the device has been granted.
*/
private final BroadcastReceiver mUsbReceiver = new BroadcastReceiver() {
@Override
public void onReceive(Context context, Intent intent) {
String action = intent.getAction();
UsbDevice usbDevice = (UsbDevice) intent.getParcelableExtra(UsbManager.EXTRA_DEVICE);
String deviceName = usbDevice.getDeviceName();
if (ACTION_USB_PERMISSION.equals(action)) {
boolean permission = intent.getBooleanExtra(UsbManager.EXTRA_PERMISSION_GRANTED,
false);
Log.d(LOG_TAG, "ACTION_USB_PERMISSION: " + permission + " Device: " + deviceName);
if (permission) {
interceptIntent(intent);
}
context.unregisterReceiver(mUsbReceiver);
}
}
};
public UsbConnectionManager(final Activity activity, final OnDiscoveredUsbDeviceListener listener) {
this.mActivity = activity;
this.mListener = listener;
mRunning.acquireUninterruptibly();
mWatchThread.start();
}
private static UsbDevice getDevice(UsbManager manager) {
HashMap<String, UsbDevice> deviceList = manager.getDeviceList();
for (UsbDevice device : deviceList.values()) {
if (device.getVendorId() == 0x1050 && (device.getProductId() == 0x0112 || device.getProductId() == 0x0115)) {
return device;
}
}
return null;
}
public void startListeningForDevices() {
mRunning.release();
}
public void stopListeningForDevices() {
mRunning.acquireUninterruptibly();
}
public void interceptIntent(final Intent intent) {
if (intent == null || intent.getAction() == null) return;
switch (intent.getAction()) {
/*case UsbManager.ACTION_USB_DEVICE_ATTACHED: {
final UsbManager usbManager = (UsbManager) mActivity.getSystemService(Context.USB_SERVICE);
final UsbDevice device = intent.getParcelableExtra(UsbManager.EXTRA_DEVICE);
Intent usbI = new Intent(mActivity, getClass()).addFlags(Intent.FLAG_ACTIVITY_SINGLE_TOP | Intent.FLAG_ACTIVITY_CLEAR_TOP);
usbI.setAction(ACTION_USB_PERMISSION);
usbI.putExtra(UsbManager.EXTRA_DEVICE, device);
PendingIntent pi = PendingIntent.getActivity(mActivity, 0, usbI, PendingIntent.FLAG_CANCEL_CURRENT);
usbManager.requestPermission(device, pi);
break;
}*/
case ACTION_USB_PERMISSION: {
UsbDevice device = intent.getParcelableExtra(UsbManager.EXTRA_DEVICE);
if (device != null)
mListener.usbDeviceDiscovered(device);
break;
}
default:
break;
}
}
public void onDestroy() {
mStopped.set(true);
mRunning.release();
try {
mActivity.unregisterReceiver(mUsbReceiver);
} catch (IllegalArgumentException ignore) {
}
mActivity = null;
}
}
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