byte[] Authenticate()
{
string user, passwd;
var result = Parse(request, requestLength, out user, out passwd);
if (result == Socks5ParseResult.NotEnoughData)
{
return(null);
}
// +-----+--------+
// | VER | METHOD |
// +-----+--------+
// | 1 | 1 |
// +-----+--------+
var response = new byte[2];
response[0] = 0x05;
if (result == Socks5ParseResult.Success && user == "username" && passwd == "password")
{
response[1] = (byte)Socks5Reply.Success;
state = Socks5ListenerState.Command;
}
else
{
response[1] = (byte)Socks5Reply.ConnectionNotAllowed;
state = Socks5ListenerState.NegotiateAuthMethod;
}
return(response);
}
byte[] NegotiateAuthMethod()
{
Socks5AuthMethod[] methods;
Socks5AuthMethod method;
var result = Parse(request, requestLength, out methods);
if (result == Socks5ParseResult.NotEnoughData)
{
return(null);
}
if (result == Socks5ParseResult.Success)
{
var anonymous = false;
var userpass = false;
for (int i = 0; i < methods.Length; i++)
{
if (methods[i] == Socks5AuthMethod.Anonymous)
{
anonymous = true;
}
else if (methods[i] == Socks5AuthMethod.UserPassword)
{
userpass = true;
}
}
if (userpass)
{
method = Socks5AuthMethod.UserPassword;
state = Socks5ListenerState.Authenticate;
}
else if (anonymous)
{
method = Socks5AuthMethod.Anonymous;
state = Socks5ListenerState.Command;
}
else
{
method = Socks5AuthMethod.NotSupported;
}
}
else
{
method = Socks5AuthMethod.NotSupported;
}
// +-----+--------+
// | VER | METHOD |
// +-----+--------+
// | 1 | 1 |
// +-----+--------+
var response = new byte[2];
response[0] = 0x05;
response[1] = (byte)method;
return(response);
}
