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;
}
