public byte[] Serialize <T>(CryptoDtoChannel channel, CryptoDtoMode mode, T obj)
{
ArrayBufferWriter <byte> arrayBufferWriter = new ArrayBufferWriter <byte>();
Serialize(arrayBufferWriter, channel, mode, obj);
return(arrayBufferWriter.WrittenSpan.ToArray());
}
public ReadOnlySpan <byte> GetReceiveKey(CryptoDtoMode mode)
{
switch (mode)
{
case CryptoDtoMode.ChaCha20Poly1305:
return(aeadReceiveKey);
default:
throw new CryptographicException("CryptoDtoMode value not handled.");
}
}
public ReadOnlySpan <byte> GetTransmitKey(string channelTag, CryptoDtoMode mode, out ulong transmitSequence)
{
lock (channelStoreLock)
{
if (!channelStore.ContainsKey(channelTag))
{
throw new CryptographicException("Key tag does not exist in store. (" + channelTag + ")");
}
return(channelStore[channelTag].GetTransmitKey(mode, out transmitSequence));
}
}
//[Obsolete]
//public byte[] Pack(CryptoDtoChannelStore channelStore, string channelTag, CryptoDtoMode mode, ReadOnlySpan<byte> dtoNameBuffer, ReadOnlySpan<byte> dtoBuffer)
//{
// var channel = channelStore.GetChannel(channelTag);
// return Pack(channel, mode, dtoNameBuffer, dtoBuffer);
//}
//[Obsolete]
//public byte[] Pack(CryptoDtoChannel channel, CryptoDtoMode mode, ReadOnlySpan<byte> dtoNameBuffer, ReadOnlySpan<byte> dtoBuffer)
//{
// ArrayBufferWriter<byte> arrayBufferWriter = new ArrayBufferWriter<byte>();
// Pack(arrayBufferWriter, channel, mode, dtoNameBuffer, dtoBuffer);
// return arrayBufferWriter.WrittenSpan.ToArray();
//}
public void Pack(IBufferWriter <byte> output, CryptoDtoChannel channel, CryptoDtoMode mode, ReadOnlySpan <byte> dtoNameBuffer, ReadOnlySpan <byte> dtoBuffer)
{
channel.GetTransmitKey(mode, out ulong sequenceToSend);
CryptoDtoHeaderDto header = new CryptoDtoHeaderDto
{
ChannelTag = channel.ChannelTag,
Mode = mode,
Sequence = sequenceToSend
};
Pack(output, header, channel.TransmitChaCha20Poly1305, dtoNameBuffer, dtoBuffer);
}
private static byte[] Pack(string channelTag, CryptoDtoMode mode, ReadOnlySpan <byte> transmitKey, ulong sequenceToBeSent, byte[] dtoNameBuffer, byte[] dtoBuffer)
{
CryptoDtoHeaderDto header = new CryptoDtoHeaderDto
{
ChannelTag = channelTag,
Sequence = sequenceToBeSent,
Mode = mode
};
var headerBuffer = MessagePackSerializer.Serialize(header);
ushort headerLength = (ushort)headerBuffer.Length;
ushort dtoNameLength = (ushort)dtoNameBuffer.Length;
ushort dtoLength = (ushort)dtoBuffer.Length;
switch (header.Mode)
{
case CryptoDtoMode.ChaCha20Poly1305:
{
int aePayloadLength = 2 + dtoNameLength + 2 + dtoLength;
var aePayloadBuffer = new byte[aePayloadLength];
Array.Copy(BitConverter.GetBytes(dtoNameLength), 0, aePayloadBuffer, 0, 2);
Array.Copy(dtoNameBuffer, 0, aePayloadBuffer, 2, dtoNameLength);
Array.Copy(BitConverter.GetBytes(dtoLength), 0, aePayloadBuffer, 2 + dtoNameLength, 2);
Array.Copy(dtoBuffer, 0, aePayloadBuffer, 2 + dtoNameLength + 2, dtoLength);
int adPayloadLength = 2 + headerLength;
var adPayloadBuffer = new byte[adPayloadLength];
Array.Copy(BitConverter.GetBytes(headerLength), 0, adPayloadBuffer, 0, 2);
Array.Copy(headerBuffer, 0, adPayloadBuffer, 2, headerLength);
Span <byte> nonceBuffer = stackalloc byte[Aead.NonceSize];
BinaryPrimitives.WriteUInt64LittleEndian(nonceBuffer.Slice(4), header.Sequence);
var aead = new ChaCha20Poly1305(transmitKey.ToArray());
byte[] aeadPayload = aead.Encrypt(aePayloadBuffer, adPayloadBuffer, nonceBuffer);
int aeadPayloadLength = aeadPayload.Length;
byte[] packetBuffer = new byte[2 + headerLength + aeadPayloadLength];
Array.Copy(BitConverter.GetBytes(headerLength), 0, packetBuffer, 0, 2);
Array.Copy(headerBuffer, 0, packetBuffer, 2, headerLength);
Array.Copy(aeadPayload, 0, packetBuffer, 2 + headerLength, aeadPayloadLength);
return(packetBuffer);
}
default:
throw new CryptographicException("Mode not recognised");
}
}
public ReadOnlySpan <byte> GetTransmitKey(CryptoDtoMode mode, out ulong sequenceToSend)
{
sequenceToSend = transmitSequence;
transmitSequence++;
LastTransmitUtc = DateTime.UtcNow;
switch (mode)
{
case CryptoDtoMode.ChaCha20Poly1305:
return(aeadTransmitKey);
default:
throw new CryptographicException("CryptoDtoMode value not handled.");
}
}
public static long SerialiseCryptoDto <T>(this DealerSocket dealerSocket, object data, CryptoDtoChannel channel, CryptoDtoMode mode)
{
T typedData = (T)data;
byte[] cryptoData = CryptoDtoSerializer.Serialize(channel, mode, typedData);
dealerSocket
.SendMoreFrameEmpty()
.SendFrame(cryptoData);
return(cryptoData.Length);
}
private static byte[] Serialise <T>(string channelTag, CryptoDtoMode mode, ReadOnlySpan <byte> transmitKey, ulong sequenceToBeSent, T dto)
{
byte[] dtoNameBuffer = GetDtoNameBytes <T>();
byte[] dtoBuffer = MessagePackSerializer.Serialize(dto);
return(Pack(channelTag, mode, transmitKey, sequenceToBeSent, dtoNameBuffer, dtoBuffer));
}
public static byte[] Pack(CryptoDtoChannel channel, CryptoDtoMode mode, byte[] dtoNameBuffer, byte[] dtoBuffer)
{
var transmitKey = channel.GetTransmitKey(mode, out ulong sequenceToSend);
return(Pack(channel.ChannelTag, mode, transmitKey, sequenceToSend, dtoNameBuffer, dtoBuffer));
}
public static byte[] Serialize <T>(CryptoDtoChannel channel, CryptoDtoMode mode, T obj)
{
var transmitKey = channel.GetTransmitKey(mode, out ulong sequenceToSend);
return(Serialise(channel.ChannelTag, mode, transmitKey, sequenceToSend, obj));
}
// Hint for callers using ArrayBufferWriter<byte> - output.WrittenSpan contains the serialised data
public void Serialize <T>(IBufferWriter <byte> output, CryptoDtoChannel channel, CryptoDtoMode mode, T dto)
{
lock (bufferLock)
{
ReadOnlySpan <byte> dtoNameBuffer = GetDtoNameBytes <T>();
dtoBuffer.Clear();
MessagePackSerializer.Serialize(dtoBuffer, dto);
Pack(output, channel, mode, dtoNameBuffer, dtoBuffer.WrittenSpan);
}
}
// Hint for callers using ArrayBufferWriter<byte> - output.WrittenSpan contains the serialised data
public void Serialize <T>(IBufferWriter <byte> output, CryptoDtoChannelStore channelStore, string channelTag, CryptoDtoMode mode, T obj)
{
var channel = channelStore.GetChannel(channelTag);
Serialize(output, channel, mode, obj);
}
public byte[] Serialize <T>(CryptoDtoChannelStore channelStore, string channelTag, CryptoDtoMode mode, T obj)
{
var channel = channelStore.GetChannel(channelTag);
return(Serialize(channel, mode, obj));
}