/// <summary>
/// Receive the first 768 bits of the transmission from the remote client, which is Y in the protocol
/// (Either "1 A->B: Diffie Hellman Ya, PadA" or "2 B->A: Diffie Hellman Yb, PadB")
/// </summary>
protected async Task ReceiveY()
{
OtherY = new byte[96];
await ReceiveMessage(OtherY, 96);
S = ModuloCalculator.Calculate(OtherY, X);
await doneReceiveY();
}
/// <summary>
/// Receive the first 768 bits of the transmission from the remote client, which is Y in the protocol
/// (Either "1 A->B: Diffie Hellman Ya, PadA" or "2 B->A: Diffie Hellman Yb, PadB")
/// </summary>
protected async ReusableTask ReceiveY()
{
byte[] otherY = new byte[96];
await ReceiveMessage(otherY, 96).ConfigureAwait(false);
S = ModuloCalculator.Calculate(otherY, X);
await DoneReceiveY().ConfigureAwait(false);
}
/// <summary>
/// Receive the first 768 bits of the transmission from the remote client, which is Y in the protocol
/// (Either "1 A->B: Diffie Hellman Ya, PadA" or "2 B->A: Diffie Hellman Yb, PadB")
/// </summary>
protected async ReusableTask ReceiveY()
{
byte[] otherY = new byte[96];
await ReceiveMessage(otherY, 96);
S = ModuloCalculator.Calculate(otherY, X);
await doneReceiveY();
}
protected EncryptedSocket(EncryptionTypes allowedEncryption)
{
random = RandomNumberGenerator.Create();
hasher = HashAlgoFactory.Create <SHA1> ();
X = new byte[20];
random.GetBytes(X);
Y = ModuloCalculator.Calculate(ModuloCalculator.TWO, X);
SetMinCryptoAllowed(allowedEncryption);
}
/// <summary>
/// Receive the first 768 bits of the transmission from the remote client, which is Y in the protocol
/// (Either "1 A->B: Diffie Hellman Ya, PadA" or "2 B->A: Diffie Hellman Yb, PadB")
/// </summary>
async ReusableTask ReceiveYAsync()
{
var otherY = new byte[96];
using (NetworkIO.BufferPool.Rent(otherY.Length, out ByteBuffer buffer)) {
await ReceiveMessageAsync(buffer, otherY.Length).ConfigureAwait(false);
Buffer.BlockCopy(buffer.Data, 0, otherY, 0, otherY.Length);
S = ModuloCalculator.Calculate(otherY, X);
await DoneReceiveY().ConfigureAwait(false);
}
}
/// <summary>
/// Calculate 2^X mod P
/// </summary>
private void GenerateY()
{
Y = ModuloCalculator.Calculate(ModuloCalculator.TWO, X);
}
protected virtual void doneReceiveY()
{
S = ModuloCalculator.Calculate(OtherY, X);
}
