public SenderKeyMessage(UInt32 keyId, UInt32 iteration, byte[] ciphertext, ECPrivateKey signatureKey)
{
byte[] version = { ByteUtil.IntsToByteHighAndLow(CURRENT_VERSION, CURRENT_VERSION) };
var messageObj = new WhisperProtos.SenderKeyMessage {
id = (uint)keyId,
iteration = (uint)iteration,
ciphertext = ciphertext,
};
byte[] message;
using(var stream = new MemoryStream())
{
Serializer.Serialize<WhisperProtos.SenderKeyMessage>(stream, messageObj);
message = stream.ToArray();
}
byte[] signature = GetSignature(signatureKey, ByteUtil.Combine(version, message));
_serialized = ByteUtil.Combine(version, message, signature);
KeyId = keyId;
Iteration = iteration;
CipherText = ciphertext;
}
public SenderKeyMessage(byte[] serialized)
{
try
{
byte[][] messageParts = ByteUtil.Split(serialized, 1, serialized.Length - 1 - SignatureLength, SignatureLength);
byte version = messageParts[0][0];
byte[] message = messageParts[1];
byte[] signature = messageParts[2];
if (ByteUtil.HighBitsToInt(version) < 3)
{
throw new LegacyMessageException("Legacy message: " + ByteUtil.HighBitsToInt(version));
}
if (ByteUtil.HighBitsToInt(version) > CurrentVersion)
{
throw new InvalidMessageException("Unknown version: " + ByteUtil.HighBitsToInt(version));
}
WhisperProtos.SenderKeyMessage senderKeyMessage = WhisperProtos.SenderKeyMessage.ParseFrom(message);
if (!senderKeyMessage.HasId ||
!senderKeyMessage.HasIteration ||
!senderKeyMessage.HasCiphertext)
{
throw new InvalidMessageException("Incomplete message.");
}
_serialized = serialized;
_messageVersion = (uint)ByteUtil.HighBitsToInt(version);
_keyId = senderKeyMessage.Id;
_iteration = senderKeyMessage.Iteration;
_ciphertext = senderKeyMessage.Ciphertext.ToByteArray();
}
catch (/*InvalidProtocolBufferException | Parse*/ Exception e)
{
throw new InvalidMessageException(e);
}
}
public SenderKeyMessage(byte[] serialized)
{
try
{
byte[][] messageParts = ByteUtil.split(serialized, 1, serialized.Length - 1 - SIGNATURE_LENGTH, SIGNATURE_LENGTH);
byte version = messageParts[0][0];
byte[] message = messageParts[1];
byte[] signature = messageParts[2];
if (ByteUtil.highBitsToInt(version) < 3)
{
throw new LegacyMessageException("Legacy message: " + ByteUtil.highBitsToInt(version));
}
if (ByteUtil.highBitsToInt(version) > CURRENT_VERSION)
{
throw new InvalidMessageException("Unknown version: " + ByteUtil.highBitsToInt(version));
}
WhisperProtos.SenderKeyMessage senderKeyMessage = WhisperProtos.SenderKeyMessage.ParseFrom(message);
if (!senderKeyMessage.HasId ||
!senderKeyMessage.HasIteration ||
!senderKeyMessage.HasCiphertext)
{
throw new InvalidMessageException("Incomplete message.");
}
this.serialized = serialized;
messageVersion = (uint)ByteUtil.highBitsToInt(version);
keyId = senderKeyMessage.Id;
iteration = senderKeyMessage.Iteration;
ciphertext = senderKeyMessage.Ciphertext.ToByteArray();
}
catch (/*InvalidProtocolBufferException | Parse*/ Exception e)
{
throw new InvalidMessageException(e);
}
}
