PolyphiaGame/Scripts/Singleton/MistoxNet.cs

using Godot;
using Microsoft.IdentityModel.Tokens;
using System;
using System.IdentityModel.Tokens.Jwt;
using System.Net.Http;
using System.Net.Http.Json;
using System.Security.Claims;
using System.Security.Cryptography;
using System.Threading.Tasks;

public partial class MistoxNet : Node{
    Options _Options;
    Reference _Reference;

    public override void _Ready() {
        _Options = GetNode<Options>( "/root/Options" );
        _Reference = GetNode<Reference>("/root/Reference");
        _Reference.MistoxNet = this;
    }

    public static string TokenAudience = "mistox-llc-auth-token";
    public static string TokenIssuer = "https://auth.mistox.com";
    public static string TokenName = "mistox_session";

    public async Task<(bool, string)> TryGetSessionToken( string UserName, string Password ) {
        using( System.Net.Http.HttpClient client = new System.Net.Http.HttpClient() ) {
            // Get LoginTicket
            HttpResponseMessage response = await client.PostAsJsonAsync( "https://auth.mistox.com/api/auth/login", new LoginRequest { UserName = UserName, Password = Password, Site = "PolyphiaGame", StayLoggedIn = true } );
            string LoginTicket = await response.Content.ReadAsStringAsync();
            // Login Via Ticket
            HttpResponseMessage response2 = await client.PostAsJsonAsync( "https://auth.mistox.com/api/auth/token", new JWTRequest { Ticket = LoginTicket } );
            return (response2.IsSuccessStatusCode, await response2.Content.ReadAsStringAsync());
        }
    }

    public async Task<(bool, string)> TryUpdateSessionToken( string LoginTicket ) {
        using( System.Net.Http.HttpClient client = new System.Net.Http.HttpClient() ) {
            HttpResponseMessage response = await client.PostAsJsonAsync( "https://auth.mistox.com/api/auth/renew", new JWTRenewRequest { JWT = LoginTicket } );
            return (response.IsSuccessStatusCode, await response.Content.ReadAsStringAsync());
        }
    }

    public async Task<(bool, Account)> TryValidateSessionToken( string SessionToken ) {
        using( System.Net.Http.HttpClient client = new System.Net.Http.HttpClient() ) {
            HttpResponseMessage response = await client.GetAsync( "https://auth.mistox.com/api/auth/publickey" );
            string PublicKey = await response.Content.ReadAsStringAsync();
            RSA rsa = RSA.Create();
            rsa.ImportFromPem(PublicKey);
            
            TokenValidationParameters TokenParameters = new TokenValidationParameters {
                ValidateIssuer = true,
                ValidateAudience = true,
                ValidateLifetime = true,
                ValidateIssuerSigningKey = true,
                ValidIssuer = TokenIssuer,
                ValidAudience = TokenAudience,
                IssuerSigningKey = new RsaSecurityKey(rsa),
                ClockSkew = TimeSpan.FromMinutes(1)
            };

            try {
                JwtSecurityTokenHandler tokenHandler = new JwtSecurityTokenHandler();
                ClaimsPrincipal principal = tokenHandler.ValidateToken( SessionToken, TokenParameters, out SecurityToken validatedToken );
                return (true, new Account {
                    ID = Convert.ToInt32(principal.FindFirst(ClaimTypes.NameIdentifier).Value),
                    UserName = principal.FindFirst(ClaimTypes.Name).Value,
                    Email = principal.FindFirst(ClaimTypes.Email).Value
                });
            } catch (Exception) {
                return (false, null);
            }
        }
    }

}

public class LoginRequest {
    public string UserName { get; set; } = "";
    public string Password { get; set; } = "";
    public string Site { get; set; } = "";
    public bool StayLoggedIn { get; set; }
}

public class JWTRequest {
    public string Ticket { get; set; } = "";
}

public class JWTRenewRequest {
    public string JWT { get; set; } = "";
}

public class Account {
    public int ID { get; set; } // PK
    public string UserName { get; set; } = "";
    public string Email { get; set; } = "";
    public bool EmailVerified { get; set; } = false;
    public string PasswordHash { get; set; } = "";
    public string Error { get; set; } = "";
}

public class ProjectMistData {
    public int AccountID { get; set; } // PK
    public int Credits { get; set; }
    public int OddballTimer { get; set; }
    public string SessionToken { get; set; } = "";
    public int SessionID { get; set; }
    public int Kills { get; set; }
    public int Deaths { get; set; }
}