public SenderKeyDistributionMessage(uint id, uint iteration, byte[] chainKey, IEcPublicKey signatureKey)
{
byte[] version = { ByteUtil.IntsToByteHighAndLow((int)CurrentVersion, (int)CurrentVersion) };
byte[] protobuf = new SenderKeyDistributionMessage
{
Id = id,
Iteration = iteration,
ChainKey = ByteString.CopyFrom(chainKey),
SigningKey = ByteString.CopyFrom(signatureKey.Serialize())
}.ToByteArray();
_id = id;
_iteration = iteration;
_chainKey = chainKey;
_signatureKey = signatureKey;
_serialized = ByteUtil.Combine(version, protobuf);
}
public SenderKeyDistributionMessage(byte[] serialized)
{
try
{
byte[][] messageParts = ByteUtil.Split(serialized, 1, serialized.Length - 1);
byte version = messageParts[0][0];
byte[] message = messageParts[1];
if (ByteUtil.HighBitsToInt(version) < CurrentVersion)
{
throw new LegacyMessageException("Legacy message: " + ByteUtil.HighBitsToInt(version));
}
if (ByteUtil.HighBitsToInt(version) > CurrentVersion)
{
throw new InvalidMessageException("Unknown version: " + ByteUtil.HighBitsToInt(version));
}
SenderKeyDistributionMessage distributionMessage = Parser.ParseFrom(message);
if (distributionMessage.IdOneofCase == IdOneofOneofCase.None ||
distributionMessage.IterationOneofCase == IterationOneofOneofCase.None ||
distributionMessage.ChainKeyOneofCase == ChainKeyOneofOneofCase.None ||
distributionMessage.SigningKeyOneofCase == SigningKeyOneofOneofCase.None)
{
throw new InvalidMessageException("Incomplete message.");
}
_serialized = serialized;
_id = distributionMessage.Id;
_iteration = distributionMessage.Iteration;
_chainKey = distributionMessage.ChainKey.ToByteArray();
_signatureKey = Curve.DecodePoint(distributionMessage.SigningKey.ToByteArray(), 0);
}
catch (Exception e)
{
//InvalidProtocolBufferException | InvalidKey
throw new InvalidMessageException(e);
}
}