protected override NetBuffer ProcessInboundMessage(NetBuffer message)
{
switch(cryptoState)
{
case CryptoHostState.Connected:
{
int code = message.ReadInt32();
if (code == RSA_KEY_MESSAGE)
{
XmlSerializer s = new XmlSerializer(typeof(RSAParameters));
string b = message.ReadString();
StringReader reader = new StringReader(b);
RSAKey = (RSAParameters)s.Deserialize(reader);
RSA = new RSACryptoServiceProvider();
RSA.ImportParameters(RSAKey);
NetBuffer msg = new NetBuffer();
msg.Write((Int32)CRYPTO_SECRET_MESSAGE);
byte[] secret = RSA.Encrypt(MakeSecret(),false);
msg.Write((Int32)secret.Length);
msg.Write(secret);
client.SendMessage(msg,NetChannel.ReliableInOrder1);
cryptoState = CryptoHostState.SentSecret;
}
else
{
cryptoState = CryptoHostState.Invalid;
client.Disconnect("Bad Crypto");
}
}
return null;
case CryptoHostState.SentSecret:
{
int code = message.ReadInt32();
if (code == CRYPTO_SECRET_VERIFY)
{
// set em as real and let the base class call any events it needs to
string verify = new UTF8Encoding().GetString(DecryptBuffer(message.ReadBytes(message.ReadInt32())));
NetBuffer b = new NetBuffer();
b.Write(CRYPTO_SECRET_VERIFY);
byte[] cryptoBuffer = EncryptBuffer(new UTF8Encoding().GetBytes(verify));
b.Write(cryptoBuffer.Length);
b.Write(cryptoBuffer);
client.SendMessage(b, NetChannel.ReliableInOrder1);
cryptoState = CryptoHostState.SentVerify;
}
else
{
cryptoState = CryptoHostState.Invalid;
client.Disconnect("Bad Crypto");
}
}
return null;
case CryptoHostState.SentVerify:
{
int code = message.ReadInt32();
if (code == CRYPTO_ACCEPT)
{
cryptoState = CryptoHostState.Authenticated;
base.Connected(message);
}
else
{
cryptoState = CryptoHostState.Invalid;
client.Disconnect("Bad Crypto");
}
}
return null;
case CryptoHostState.Authenticated:
return new NetBuffer(DecryptBuffer(message.ReadBytes(message.LengthBytes)));
}
return message;
}
protected override void Connected(NetBuffer data)
{
cryptoState = CryptoHostState.Connected;
}
