107 lines
3.7 KiB
Java
107 lines
3.7 KiB
Java
/*
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* Copyright (C) 2017 Schürmann & Breitmoser GbR
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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package org.sufficientlysecure.keychain.securitytoken;
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import android.app.Activity;
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import android.content.BroadcastReceiver;
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import android.content.Context;
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import android.content.Intent;
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import android.content.IntentFilter;
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import android.hardware.usb.UsbDevice;
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import android.hardware.usb.UsbManager;
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import org.sufficientlysecure.keychain.securitytoken.usb.UsbTransport;
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import org.sufficientlysecure.keychain.ui.UsbEventReceiverActivity;
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import timber.log.Timber;
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public class UsbConnectionDispatcher {
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private Activity mActivity;
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private OnDiscoveredUsbDeviceListener mListener;
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private UsbManager mUsbManager;
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/**
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* Receives broadcast when a supported USB device get permission.
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*/
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private final BroadcastReceiver mUsbReceiver = new BroadcastReceiver() {
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@Override
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public void onReceive(Context context, Intent intent) {
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String action = intent.getAction();
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switch (action) {
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case UsbEventReceiverActivity.ACTION_USB_PERMISSION: {
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UsbDevice usbDevice = intent.getParcelableExtra(UsbManager.EXTRA_DEVICE);
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boolean permission = intent.getBooleanExtra(UsbManager.EXTRA_PERMISSION_GRANTED,
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false);
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if (permission) {
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Timber.d("Got permission for " + usbDevice.getDeviceName());
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sendUsbTransportDiscovered(usbDevice);
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}
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break;
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}
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}
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}
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};
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public UsbConnectionDispatcher(final Activity activity, final OnDiscoveredUsbDeviceListener listener) {
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this.mActivity = activity;
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this.mListener = listener;
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this.mUsbManager = (UsbManager) activity.getSystemService(Context.USB_SERVICE);
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}
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public void onStart() {
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final IntentFilter intentFilter = new IntentFilter();
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intentFilter.addAction(UsbEventReceiverActivity.ACTION_USB_PERMISSION);
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mActivity.registerReceiver(mUsbReceiver, intentFilter);
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}
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public void onStop() {
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mActivity.unregisterReceiver(mUsbReceiver);
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}
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/**
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* Rescans devices and triggers {@link OnDiscoveredUsbDeviceListener}
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*/
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public void rescanDevices() {
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// Note: we don't check devices VID/PID because
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// we check for permission instead.
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// We should have permission only for matching devices
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for (UsbDevice usbDevice : mUsbManager.getDeviceList().values()) {
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if (mUsbManager.hasPermission(usbDevice)) {
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sendUsbTransportDiscovered(usbDevice);
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break;
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}
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}
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}
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private void sendUsbTransportDiscovered(UsbDevice usbDevice) {
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if (mListener == null) {
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return;
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}
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UsbTransport usbTransport = UsbTransport.createUsbTransport(mActivity.getBaseContext(), usbDevice);
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mListener.usbTransportDiscovered(usbTransport);
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}
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public interface OnDiscoveredUsbDeviceListener {
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void usbTransportDiscovered(UsbTransport usbTransport);
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}
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}
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