public SenderKeyDistributionMessage(uint id, uint iteration, byte[] chainKey, ECPublicKey signatureKey)
{
byte[] version = { ByteUtil.intsToByteHighAndLow((int)CURRENT_VERSION, (int)CURRENT_VERSION) };
byte[] protobuf = new SenderKeyDistributionMessage
{
Id = id,
Iteration = iteration,
ChainKey = ByteString.CopyFrom(chainKey),
SigningKey = ByteString.CopyFrom(signatureKey.serialize())
}.ToByteArray();
this.id = id;
this.iteration = iteration;
this.chainKey = chainKey;
this.signatureKey = signatureKey;
this.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) < CiphertextMessage.CURRENT_VERSION)
{
throw new LegacyMessageException("Legacy message: " + ByteUtil.highBitsToInt(version));
}
if (ByteUtil.highBitsToInt(version) > CURRENT_VERSION)
{
throw new InvalidMessageException("Unknown version: " + ByteUtil.highBitsToInt(version));
}
SenderKeyDistributionMessage distributionMessage = SenderKeyDistributionMessage.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.");
}
this.serialized = serialized;
this.id = distributionMessage.Id;
this.iteration = distributionMessage.Iteration;
this.chainKey = distributionMessage.ChainKey.ToByteArray();
this.signatureKey = Curve.decodePoint(distributionMessage.SigningKey.ToByteArray(), 0);
}
catch (Exception e)
{
//InvalidProtocolBufferException | InvalidKey
throw new InvalidMessageException(e);
}
}