69 lines
3 KiB
Java
69 lines
3 KiB
Java
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/**
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* Copyright (C) 2011 Whisper Systems
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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.thoughtcrime.securesms.crypto;
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import java.util.LinkedList;
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import org.thoughtcrime.securesms.database.LocalKeyRecord;
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import org.thoughtcrime.securesms.recipients.Recipient;
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import org.thoughtcrime.securesms.recipients.Recipients;
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import org.thoughtcrime.securesms.sms.MessageSender;
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import android.app.AlertDialog;
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import android.content.Context;
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import android.content.DialogInterface;
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import android.util.Log;
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public class KeyExchangeInitiator {
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public static void initiate(final Context context, final MasterSecret masterSecret, final Recipient recipient, boolean promptOnExisting) {
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if (promptOnExisting && hasInitiatedSession(context, masterSecret, recipient)) {
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AlertDialog.Builder dialog = new AlertDialog.Builder(context);
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dialog.setTitle("Initiate Despite Existing Request?");
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dialog.setMessage("You've already sent a session initiation request to this recipient, are you sure you'd like to send another? This will invalidate the first request.");
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dialog.setIcon(android.R.drawable.ic_dialog_alert);
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dialog.setCancelable(true);
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dialog.setPositiveButton("Send", new DialogInterface.OnClickListener() {
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public void onClick(DialogInterface dialog, int which) {
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initiateKeyExchange(context, masterSecret, recipient);
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}
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});
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dialog.setNegativeButton("Cancel", null);
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dialog.show();
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} else {
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initiateKeyExchange(context, masterSecret, recipient);
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}
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}
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private static void initiateKeyExchange(Context context, MasterSecret masterSecret, Recipient recipient) {
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LocalKeyRecord record = KeyUtil.initializeRecordFor(recipient, context, masterSecret);
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KeyExchangeMessage message = new KeyExchangeMessage(context, masterSecret, 1, record, 0);
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Log.w("SendKeyActivity", "Sending public key: " + record.getCurrentKeyPair().getPublicKey().getFingerprint());
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LinkedList<Recipient> list = new LinkedList<Recipient>();
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list.add(recipient);
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MessageSender.send(context, masterSecret, new Recipients(list), -1, message.serialize(), false);
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}
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private static boolean hasInitiatedSession(Context context, MasterSecret masterSecret, Recipient recipient) {
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return
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LocalKeyRecord.hasRecord(context, recipient) &&
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new LocalKeyRecord(context, masterSecret, recipient).getCurrentKeyPair() != null;
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}
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}
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