Signal-Android/src/org/thoughtcrime/securesms/crypto/KeyExchangeProcessor.java

52 lines
2.2 KiB
Java

/**
* Copyright (C) 2011 Whisper Systems
* Copyright (C) 2013 Open 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 org.thoughtcrime.securesms.crypto;
import android.content.Context;
import android.content.Intent;
import org.thoughtcrime.securesms.crypto.protocol.KeyExchangeMessage;
import org.thoughtcrime.securesms.service.KeyCachingService;
import org.whispersystems.libaxolotl.InvalidMessageException;
import org.whispersystems.textsecure.crypto.MasterSecret;
import org.whispersystems.textsecure.storage.RecipientDevice;
public abstract class KeyExchangeProcessor {
public static final String SECURITY_UPDATE_EVENT = "org.thoughtcrime.securesms.KEY_EXCHANGE_UPDATE";
public abstract boolean isStale(KeyExchangeMessage message);
public abstract boolean isTrusted(KeyExchangeMessage message);
public abstract void processKeyExchangeMessage(KeyExchangeMessage message, long threadid)
throws InvalidMessageException;
public static KeyExchangeProcessor createFor(Context context, MasterSecret masterSecret,
RecipientDevice recipientDevice,
KeyExchangeMessage message)
{
return new KeyExchangeProcessorV2(context, masterSecret, recipientDevice);
}
public static void broadcastSecurityUpdateEvent(Context context, long threadId) {
Intent intent = new Intent(SECURITY_UPDATE_EVENT);
intent.putExtra("thread_id", threadId);
intent.setPackage(context.getPackageName());
context.sendBroadcast(intent, KeyCachingService.KEY_PERMISSION);
}
}