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/*
This file is part of GNUnet.
(C) 2014 Christian Grothoff (and other contributing authors)
GNUnet 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, or (at your
option) any later version.
GNUnet 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 GNUnet; see the file COPYING. If not, write to the
Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA.
*/
package org.gnunet.secretsharing;
import org.gnunet.secretsharing.messages.GenerateMessage;
import org.gnunet.secretsharing.messages.SecretReadyMessage;
import org.gnunet.util.*;
/**
* Key generation session.
*/
public class KeyGeneration {
private Client client;
private SecretReadyCallback secretReadyCallback;
private class KeyGenerationReceiver extends RunaboutMessageReceiver {
public void visit(SecretReadyMessage m) {
secretReadyCallback.onSecretReady(m.share);
client.disconnect();
client = null;
}
@Override
public void handleError() {
secretReadyCallback.onSecretReady(null);
}
}
/**
* Generate a threshold key pair.
*
* @param configuration configuratio to use
* @param peers peers in the session, the local peer is optional
* @param sessionId session id
* @param start when should we start to generate the key with other peers?
* @param deadline when should the key generation be finished?
* @param threshold minimum number of peers required to decrypt a ciphertext
* @param secretReadyCallback called when the key has been generated or
* an error occured
*/
public KeyGeneration(Configuration configuration, PeerIdentity[] peers,
HashCode sessionId, AbsoluteTime start, AbsoluteTime deadline,
int threshold, SecretReadyCallback secretReadyCallback) {
this.client = new Client("secretsharing", configuration);
this.secretReadyCallback = secretReadyCallback;
client.installReceiver(new KeyGenerationReceiver());
GenerateMessage m = new GenerateMessage();
m.start = start.asMessage();
m.deadline = deadline.asMessage();
m.threshold = threshold;
m.numPeers = peers.length;
m.peers = peers;
m.sessionId = sessionId;
client.send(m);
}
/**
* Disconnect from the secretsharing service and onCancel the operation.
* The SecretReadyCallback will not be called after calling disconnect.
*/
public void disconnect() {
if (null != client) {
client.disconnect();
client = null;
}
}
}
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