public override void Start(Session session, KeyExchangeInitMessage message)
{
base.Start(session, message);
Session.RegisterMessage("SSH_MSG_KEXDH_REPLY");
Session.KeyExchangeDhReplyMessageReceived += Session_KeyExchangeDhReplyMessageReceived;
_prime = GroupPrime;
_group = new BigInteger(new byte[] { 2 });
PopulateClientExchangeValue();
SendMessage(new KeyExchangeDhInitMessage(_clientExchangeValue));
}