using System;
using System.IO;
using System.Collections.Specialized;
using System.Net;
using System.Text;
using System.Web;
using System.Security.Cryptography;
using Newtonsoft.Json;
using System.Security.Cryptography.X509Certificates;
using System.Net.Security;

namespace RsaGOD
{
    public class rif
    {

        public static string rsarif(string user,string pass)
        {
            var data = new NameValueCollection();
            data.Add("username", user);
            string response = Fetch("https://steamcommunity.com/login/getrsakey", "POST", data, null, false);
            var rsaJSON = JsonConvert.DeserializeObject<GetRsaKey>(response);
            //RSA Encryption
            RSACryptoServiceProvider rsa = new RSACryptoServiceProvider();
            RSAParameters rsaParameters = new RSAParameters();

            rsaParameters.Exponent = HexToByte(rsaJSON.publickey_exp);
            rsaParameters.Modulus = HexToByte(rsaJSON.publickey_mod);

            rsa.ImportParameters(rsaParameters);

            byte[] bytePassword = Encoding.ASCII.GetBytes(pass);
            byte[] encodedPassword = rsa.Encrypt(bytePassword, false);
            return Convert.ToBase64String(encodedPassword);


        }
        #region gamno

        static int GetHexVal(char hex)
        {
            int val = (int)hex;
            return val - (val < 58 ? 48 : 55);
        }


        public static string Fetch(string url, string method, NameValueCollection data, CookieContainer cookies, bool ajax )
        {
            data = null;cookies = null;ajax = true;
            HttpWebResponse response = Request(url, method, data, cookies, ajax);
            StreamReader reader = new StreamReader(response.GetResponseStream());
            return reader.ReadToEnd();
        }

        public static HttpWebResponse Request(string url, string method, NameValueCollection data, CookieContainer cookies, bool ajax)
        {
            data = null; cookies = null; ajax = true;
            HttpWebRequest request = WebRequest.Create(url) as HttpWebRequest;

            request.Method = method;

            request.Accept = "text/javascript, text/html, application/xml, text/xml, */*";
            request.ContentType = "application/x-www-form-urlencoded; charset=UTF-8";
            request.Host = "steamcommunity.com";
            request.UserAgent = "Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/536.11 (KHTML, like Gecko) Chrome/20.0.1132.47 Safari/536.11";
            request.Referer = "http://steamcommunity.com/trade/1";

            if (ajax)
            {
                request.Headers.Add("X-Requested-With", "XMLHttpRequest");
                request.Headers.Add("X-Prototype-Version", "1.7");
            }

            // Cookies
            request.CookieContainer = cookies ?? new CookieContainer();

            // Request data
            if (data != null)
            {
                string dataString = String.Join("&", Array.ConvertAll(data.AllKeys, key =>
                    String.Format("{0}={1}", key,data[key])
                )
                );

                byte[] dataBytes = Encoding.ASCII.GetBytes(dataString);
                request.ContentLength = dataBytes.Length;

                Stream requestStream = request.GetRequestStream();
                requestStream.Write(dataBytes, 0, dataBytes.Length);
            }

            // Get the response
            return request.GetResponse() as HttpWebResponse;
        }
        public class GetRsaKey
        {
            public bool success { get; set; }

            public string publickey_mod { get; set; }

            public string publickey_exp { get; set; }

            public string timestamp { get; set; }
        }




        static byte[] HexToByte(string hex)
        {
            if (hex.Length % 2 == 1)
                throw new Exception("The binary key cannot have an odd number of digits");

            byte[] arr = new byte[hex.Length >> 1];
            int l = hex.Length;

            for (int i = 0; i < (l >> 1); ++i)
            {
                arr[i] = (byte)((GetHexVal(hex[i << 1]) << 4) + (GetHexVal(hex[(i << 1) + 1])));
            }

            return arr;
        }
        #endregion;


    }
}