/** * Copyright (C) 2011 Whisper Systems * * This program is free software: you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation, either version 3 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program. If not, see . */ package org.thoughtcrime.securesms; import org.thoughtcrime.securesms.crypto.SerializableKey; import org.thoughtcrime.securesms.util.Base64; import org.thoughtcrime.securesms.util.Dialogs; import android.app.Activity; import android.content.Intent; import android.view.ContextMenu; import android.view.ContextMenu.ContextMenuInfo; import android.view.Menu; import android.view.MenuItem; import android.view.View; import android.widget.Toast; import com.google.zxing.integration.android.IntentIntegrator; import com.google.zxing.integration.android.IntentResult; /** * Activity for initiating/receiving key QR code scans. * * @author Moxie Marlinspike */ public abstract class KeyScanningActivity extends Activity { private static final int MENU_ITEM_SCAN = 1; private static final int MENU_ITEM_GET_SCANNED = 2; @Override public void onCreateContextMenu(ContextMenu menu, View v, ContextMenuInfo menuInfo) { menu.add(0, MENU_ITEM_SCAN, Menu.NONE, getScanString()); menu.add(0, MENU_ITEM_GET_SCANNED, Menu.NONE, getDisplayString()); } @Override public boolean onContextItemSelected(MenuItem item) { switch(item.getItemId()) { case MENU_ITEM_SCAN: initiateScan(); return true; case MENU_ITEM_GET_SCANNED: initiateDisplay(); return true; } return false; } @Override public void onActivityResult(int requestCode, int resultCode, Intent intent) { IntentResult scanResult = IntentIntegrator.parseActivityResult(requestCode, resultCode, intent); if ((scanResult != null) && (scanResult.getContents() != null)) { String data = scanResult.getContents(); if (data.equals(Base64.encodeBytes(getIdentityKeyToCompare().serialize()))) { Dialogs.displayAlert(this, getVerifiedTitle(), getVerifiedMessage(), android.R.drawable.ic_dialog_info); } else { Dialogs.displayAlert(this, getNotVerifiedTitle(), getNotVerifiedMessage(), android.R.drawable.ic_dialog_alert); } } else { Toast.makeText(this, "No scanned key found!", Toast.LENGTH_LONG).show(); } } protected void initiateScan() { IntentIntegrator.initiateScan(this); } protected void initiateDisplay() { IntentIntegrator.shareText(this, Base64.encodeBytes(getIdentityKeyToDisplay().serialize())); } protected abstract String getScanString(); protected abstract String getDisplayString(); protected abstract String getNotVerifiedTitle(); protected abstract String getNotVerifiedMessage(); protected abstract SerializableKey getIdentityKeyToCompare(); protected abstract SerializableKey getIdentityKeyToDisplay(); protected abstract String getVerifiedTitle(); protected abstract String getVerifiedMessage(); }