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/**
* Copyright (C) 2014-2015 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.whispersystems.libaxolotl.groups.state;
import org.whispersystems.libaxolotl.InvalidKeyIdException;
import org.whispersystems.libaxolotl.ecc.ECKeyPair;
import org.whispersystems.libaxolotl.ecc.ECPublicKey;
import org.whispersystems.libaxolotl.state.StorageProtos;
import java.io.IOException;
import java.util.LinkedList;
import java.util.List;
import static org.whispersystems.libaxolotl.state.StorageProtos.SenderKeyRecordStructure;
/**
* A durable representation of a set of SenderKeyStates for a specific
* SenderKeyName.
*
* @author Moxie Marlisnpike
*/
public class SenderKeyRecord {
private List<SenderKeyState> senderKeyStates = new LinkedList<>();
public SenderKeyRecord() {}
public SenderKeyRecord(byte[] serialized) throws IOException {
SenderKeyRecordStructure senderKeyRecordStructure = SenderKeyRecordStructure.parseFrom(serialized);
for (StorageProtos.SenderKeyStateStructure structure : senderKeyRecordStructure.getSenderKeyStatesList()) {
this.senderKeyStates.add(new SenderKeyState(structure));
}
}
public boolean isEmpty() {
return senderKeyStates.isEmpty();
}
public SenderKeyState getSenderKeyState() throws InvalidKeyIdException {
if (!senderKeyStates.isEmpty()) {
return senderKeyStates.get(0);
} else {
throw new InvalidKeyIdException("No key state in record!");
}
}
public SenderKeyState getSenderKeyState(int keyId) throws InvalidKeyIdException {
for (SenderKeyState state : senderKeyStates) {
if (state.getKeyId() == keyId) {
return state;
}
}
throw new InvalidKeyIdException("No keys for: " + keyId);
}
public void addSenderKeyState(int id, int iteration, byte[] chainKey, ECPublicKey signatureKey) {
senderKeyStates.add(new SenderKeyState(id, iteration, chainKey, signatureKey));
}
public void setSenderKeyState(int id, int iteration, byte[] chainKey, ECKeyPair signatureKey) {
senderKeyStates.clear();
senderKeyStates.add(new SenderKeyState(id, iteration, chainKey, signatureKey));
}
public byte[] serialize() {
SenderKeyRecordStructure.Builder recordStructure = SenderKeyRecordStructure.newBuilder();
for (SenderKeyState senderKeyState : senderKeyStates) {
recordStructure.addSenderKeyStates(senderKeyState.getStructure());
}
return recordStructure.build().toByteArray();
}
}
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