public static SocksEncryption RequestSpecialMode(List<AuthTypes> auth, Client client) { //select mode, do key exchange if encryption, or start compression. if (auth.Contains(AuthTypes.SocksBoth)) { //tell client that we chose socksboth. client.Send(new byte[] { (byte)HeaderTypes.Socks5, (byte)AuthTypes.SocksBoth }); //wait for public key. SocksEncryption ph = new SocksEncryption(); ph.GenerateKeys(); //wait for public key. byte[] buffer = new byte[4096]; int keysize = client.Receive(buffer, 0, buffer.Length); //store key in our encryption class. ph.SetKey(buffer, 0, keysize); //send key. client.Send(ph.GetPublicKey()); //now we give them our key. client.Send(ph.ShareEncryptionKey()); //send more. int enckeysize = client.Receive(buffer, 0, buffer.Length); //decrypt with our public key. byte[] newkey = new byte[enckeysize]; Buffer.BlockCopy(buffer, 0, newkey, 0, enckeysize); ph.SetEncKey(ph.key.Decrypt(newkey, false)); ph.SetType(AuthTypes.SocksBoth); //ready up our client. return ph; } else if (auth.Contains(AuthTypes.SocksEncrypt)) { //tell client that we chose socksboth. client.Send(new byte[] { (byte)HeaderTypes.Socks5, (byte)AuthTypes.SocksEncrypt }); //wait for public key. SocksEncryption ph = new SocksEncryption(); ph.GenerateKeys(); //wait for public key. byte[] buffer = new byte[4096]; int keysize = client.Receive(buffer, 0, buffer.Length); //store key in our encryption class. ph.SetKey(buffer, 0, keysize); ph.SetType(AuthTypes.SocksBoth); //ready up our client. return ph; } else if (auth.Contains(AuthTypes.SocksCompress)) { //start compression. client.Send(new byte[] { (byte)HeaderTypes.Socks5, (byte)AuthTypes.SocksCompress }); SocksEncryption ph = new SocksEncryption(); ph.SetType(AuthTypes.SocksCompress); //ready } else if (auth.Contains(AuthTypes.Login)) { SocksEncryption ph = new SocksEncryption(); ph.SetType(AuthTypes.Login); return ph; } return null; }