/**
* 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 <http://www.gnu.org/licenses/>.
*/
package com.securecomcode.text;
import android.content.ComponentName;
import android.content.Context;
import android.content.Intent;
import android.content.ServiceConnection;
import android.os.IBinder;
import org.whispersystems.textsecure.crypto.MasterSecret;
import com.securecomcode.text.service.KeyCachingService;
import com.securecomcode.text.util.MemoryCleaner;
import com.actionbarsherlock.app.SherlockActivity;
/**
* Base Activity for changing/prompting local encryption passphrase.
*
* @author Moxie Marlinspike
*/
public abstract class PassphraseActivity extends SherlockActivity {
private KeyCachingService keyCachingService;
private MasterSecret masterSecret;
protected void setMasterSecret(MasterSecret masterSecret) {
this.masterSecret = masterSecret;
Intent bindIntent = new Intent(this, KeyCachingService.class);
bindService(bindIntent, serviceConnection, Context.BIND_AUTO_CREATE);
}
protected MasterSecret getMasterSecret() {
return masterSecret;
}
protected abstract void cleanup();
private ServiceConnection serviceConnection = new ServiceConnection() {
@Override
public void onServiceConnected(ComponentName className, IBinder service) {
keyCachingService = ((KeyCachingService.KeyCachingBinder)service).getService();
keyCachingService.setMasterSecret(masterSecret);
PassphraseActivity.this.unbindService(PassphraseActivity.this.serviceConnection);
MemoryCleaner.clean(masterSecret);
cleanup();
PassphraseActivity.this.setResult(RESULT_OK);
PassphraseActivity.this.finish();
}
@Override
public void onServiceDisconnected(ComponentName name) {
keyCachingService = null;
}
};
}