C# tcp client dont work with GF login packet

[DonkeyKong69XD]

Hello, I want make login script with C#, but when I send login packet with tcp client i get "failc 1". probably there is something wrong with my login packet, but it is fine because I generated new login packet in C# and it works perfectly fine with QtTcpSocket. I dont know what to do, i tried few different tcp clients library and always i get failc 1. I don't know maybe it's this char between random hex number and nostale version, but i tried everything(\v; (char)0xB; tab; space) and nothing worked. Is there anyone here who wrote a working C# login to GF nostale and want to share knowledge?

[Roxeez]

Here is the code i'm using for a personal project and it work just fine.
Ofc you will need to modify it to make it work for you

 GameforgeAuthenticator

    public class GameforgeAuthenticator : IGameforgeAuthenticator
    {
        private const string URL = "https://spark.gameforge.com/api/v1";
        private const string PLATFORM_GAME_ID = "dd4e22d6-00d1-44b9-8126-d8b40e0cd7c9";
        private const string USER_AGENT = "GameforgeClient/2.0.48";
        private const string MEDIA_TYPE = "application/json";
        
        private readonly HttpClient _httpClient;
        private readonly ISerializer _serializer;
        private readonly IDeserializer _deserializer;

        public GameforgeAuthenticator(ISerializer serializer, IDeserializer deserializer)
        {
            _httpClient = new HttpClient();
            _serializer = serializer;
            _deserializer = deserializer;
        }

        public async Task<string> GetAuthenticationToken(string username, string password, Language language)
        {
            string serialized = _serializer.Serialize(new AuthForm
            {
                GfLang = language.GfLang,
                Username = username,
                Password = password,
                Locale = language.Locale,
                PlatformGameId = PLATFORM_GAME_ID
            });
            
            using var request = new HttpRequestMessage(HttpMethod.Post, $"{URL}/auth/thin/sessions")
            {
                Content = new StringContent(serialized, Encoding.UTF8, MEDIA_TYPE)
            };

            HttpResponseMessage response = await _httpClient.SendAsync(request);
                
            if (!response.IsSuccessStatusCode)
            {
                return string.Empty;
            }
                
            string content = await response.Content.ReadAsStringAsync();
            var jsonContent = _deserializer.Deserialize<Dictionary<string, string>>(content);

            return jsonContent.GetValueOrDefault("token") ?? string.Empty;
        }

        public async Task<IEnumerable<GameforgeAccount>> GetAccounts(string authenticationToken, Guid installationId)
        {
            using var request = new HttpRequestMessage(HttpMethod.Get, $"{URL}/user/accounts");
            
            request.Headers.Authorization = new AuthenticationHeaderValue("Bearer", authenticationToken);
            request.Headers.Add("TNT-Installation-Id", installationId.ToString());
            request.Headers.Add("User-Agent", USER_AGENT);
                
            HttpResponseMessage response = await _httpClient.SendAsync(request);
                
            if (!response.IsSuccessStatusCode)
            {
                return new List<GameforgeAccount>();
            }
                
            string content = await response.Content.ReadAsStringAsync();
            var jsonContent = _deserializer.Deserialize<Dictionary<string, GameforgeAccount>>(content);

            return jsonContent?.Values.ToArray() ?? Array.Empty<GameforgeAccount>();
        }

        public async Task<string> GetSessionToken(string authenticationToken, GameforgeAccount account, Guid installationId)
        {
            using var request = new HttpRequestMessage(HttpMethod.Post, $"{URL}/auth/thin/codes");
            
            request.Headers.Authorization = new AuthenticationHeaderValue("Bearer", authenticationToken);
            request.Headers.Add("TNT-Installation-Id", installationId.ToString());
            request.Headers.Add("User-Agent", USER_AGENT);

            string json = _serializer.Serialize(new SessionForm
            {
                PlatformGameAccountId = account.Id
            });

            request.Content = new StringContent(json, Encoding.UTF8, MEDIA_TYPE);

            HttpResponseMessage response = await _httpClient.SendAsync(request);

            if (!response.IsSuccessStatusCode)
            {
                return string.Empty;
            }

            string content = await response.Content.ReadAsStringAsync();
            var jsonContent = _deserializer.Deserialize<Dictionary<string, string>>(content);

            return (jsonContent.GetValueOrDefault("code") ?? string.Empty).ToHex();
        }
    }

 Connect

public IClient CreateLoginClient(string sessionToken, Guid gameforgeInstallationId)
{
	LoginClient client = new LoginClient();

	client.PacketReceived += packet =>
	{
		_packetManager.Handle(client, packet);
	};

	bool connected = client.Connect("79.110.84.75", 4002);
	if (!connected)
	{
		_logger.Warning("Failed to connect to login server");
		return default;
	}

	string randomValue = "00" + Random.Next(0, 126).ToString("X")
							  + Random.Next(0, 126).ToString("X")
							  + Random.Next(0, 126).ToString("X");
	client.SendPacket(
		$"NoS0577 {sessionToken} {gameforgeInstallationId} {randomValue}{(char) 0xB}{_configuration.ClientInfo.Version} 0 {(_configuration.ClientInfo.DxHash.ToUpper() + _configuration.ClientInfo.GlHash.ToUpper()).ToMd5()}");

	return client;
}

_configuration.ClientInfo.DxHash = Latest NostaleClientX.exe md5 hash
_configuration.ClientInfo.GlHash= Latest NostaleClient.exe md5 hash
_configuration.ClientInfo.Version = Latest NostaleClientX or NostaleClient version

Btw you're receiving failc1 if your client is outdated so it's probably coming from your hashes

[DonkeyKong69XD]

Originally Posted by Roxeez

Btw you're receiving failc1 if your client is outdated so it's probably coming from your hashes

Thanks, but my hashes are just fine. My code works, but there is something wrong with tcp client. I generated login packet in C# and then I tested it with C++ QtTcpSocket and I get list of servers. So idk. Can you share with me the LoginClient class?

[Roxeez]

Originally Posted by DonkeyKong69XD

Thanks, but my hashes are just fine. My code works, but there is something wrong with tcp client. I generated login packet in C# and then I tested it with C++ QtTcpSocket and I get list of servers. So idk. Can you share with me the LoginClient class?

It's just a wrapper around a System.Net.Sockets.Socket who encrypt/decrypt packets send/received

[DonkeyKong69XD]

Originally Posted by Roxeez

It's just a wrapper around a System.Net.Sockets.Socket who encrypt/decrypt packets send/received

I don't know how, but somehow I fixed it
Thanks for help.
Maybe you could help me with one more problem? How to detect GF staff?

[Apourtartt]

Check the in packet :

Authority PacketIn1::getAuthority()
{
    return static_cast<Authority>(packet[8].toShort());
}