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package org.whispersystems.libaxolotl.groups;
import org.whispersystems.libaxolotl.ecc.ECKeyPair;
import org.whispersystems.libaxolotl.groups.state.SenderKeyRecord;
import org.whispersystems.libaxolotl.groups.state.SenderKeyStore;
import org.whispersystems.libaxolotl.protocol.SenderKeyDistributionMessage;
public class GroupSessionBuilder {
private final SenderKeyStore senderKeyStore;
public GroupSessionBuilder(SenderKeyStore senderKeyStore) {
this.senderKeyStore = senderKeyStore;
}
public void process(String sender, SenderKeyDistributionMessage senderKeyDistributionMessage) {
synchronized (GroupCipher.LOCK) {
SenderKeyRecord senderKeyRecord = senderKeyStore.loadSenderKey(sender);
senderKeyRecord.addSenderKeyState(senderKeyDistributionMessage.getId(),
senderKeyDistributionMessage.getIteration(),
senderKeyDistributionMessage.getChainKey(),
senderKeyDistributionMessage.getSignatureKey());
senderKeyStore.storeSenderKey(sender, senderKeyRecord);
}
}
public SenderKeyDistributionMessage process(String groupId, int keyId, int iteration,
byte[] chainKey, ECKeyPair signatureKey)
{
synchronized (GroupCipher.LOCK) {
SenderKeyRecord senderKeyRecord = senderKeyStore.loadSenderKey(groupId);
senderKeyRecord.setSenderKeyState(keyId, iteration, chainKey, signatureKey);
senderKeyStore.storeSenderKey(groupId, senderKeyRecord);
return new SenderKeyDistributionMessage(keyId, iteration, chainKey, signatureKey.getPublicKey());
}
}
}
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