protected override void HandleHandshakeRequest()
{
// For incoming connection, the peer would send the public key to generate a shared secret.
var networkStream = NetworkStream;
var packet = Packet.Parser.ParseDelimitedFrom(networkStream);
if (packet.PacketType != PacketType.Handshake)
{
throw new Exception("Invalid packet type.");
}
KeepAliveDuration = packet.PacketKeepAliveDuration;
var handshakePacket = PacketUtility.DeserializePacketData(packet, HandshakePacket.Parser);
if (handshakePacket.HandshakeType == HandshakeType.CipherText)
{
throw new Exception("Invalid handshake type.");
}
using var kem = new KeyEncapsulationMechanism(handshakePacket.KeyEncapsulationMechanismType switch
{
KeyEncapsulationMechanismType.NtruHps4096821 => "NTRU-HPS-4096-821",
var _ => throw new ArgumentOutOfRangeException()
});
