private SenderMessageKey getSenderKey(SenderKeyState senderKeyState, uint iteration)
{
SenderChainKey senderChainKey = senderKeyState.getSenderChainKey();
if (senderChainKey.getIteration() > iteration)
{
if (senderKeyState.hasSenderMessageKey(iteration))
{
return(senderKeyState.removeSenderMessageKey(iteration));
}
else
{
throw new DuplicateMessageException("Received message with old counter: " +
senderChainKey.getIteration() + " , " + iteration);
}
}
//Avoiding a uint overflow
uint senderChainKeyIteration = senderChainKey.getIteration();
if ((iteration > senderChainKeyIteration) && (iteration - senderChainKeyIteration > 2000))
{
throw new InvalidMessageException("Over 2000 messages into the future!");
}
while (senderChainKey.getIteration() < iteration)
{
senderKeyState.addSenderMessageKey(senderChainKey.getSenderMessageKey());
senderChainKey = senderChainKey.getNext();
}
senderKeyState.setSenderChainKey(senderChainKey.getNext());
return(senderChainKey.getSenderMessageKey());
}
public void SetSenderChainKey(SenderChainKey chainKey)
{
SenderKeyStateStructure.Types.SenderChainKey senderChainKeyStructure = new SenderKeyStateStructure.Types.SenderChainKey
{
Iteration = chainKey.GetIteration(),
Seed = ByteString.CopyFrom(chainKey.GetSeed())
};
_senderKeyStateStructure.SenderChainKey = senderChainKeyStructure;
}
public void SetSenderChainKey(SenderChainKey chainKey)
{
SenderKeyStateStructure.Types.SenderChainKey senderChainKeyStructure =
SenderKeyStateStructure.Types.SenderChainKey.CreateBuilder()
.SetIteration(chainKey.GetIteration())
.SetSeed(ByteString.CopyFrom(chainKey.GetSeed()))
.Build();
this.senderKeyStateStructure = senderKeyStateStructure.ToBuilder()
.SetSenderChainKey(senderChainKeyStructure)
.Build();
}
