using System;
using System.Text;
using System.Net.Sockets;
using System.Net.Security;
using System.Security.Authentication;
using System.Security.Cryptography.X509Certificates;
namespace instaLOGINsok
{
    class MainClass
    {
        static bool ValidateServerCertificate(object sender,X509Certificate certificate,X509Chain chain,SslPolicyErrors sslPolicyErrors)
        {if (sslPolicyErrors == SslPolicyErrors.None)return true;
            return false;}
        public static void Main (string[] args)
        {
            String id = "";String pass="";String csrftoken = "";String mid = "";
            String cooks = "";
            var request1 = "GET /" + " HTTP/1.1\r\n" +
                "Host: www.instagram.com\r\n" +
                "\r\n";

            Console.WriteLine ("Insta login via tcp client By [ZeR0]\n");
            while (id == "") {Console.WriteLine ("Enter id or email and press enter");id = Console.ReadLine ().ToString();}
            Console.WriteLine ("Id set to => " + id + "\n");
            while (pass == "") {Console.WriteLine ("Enter email password and press enter");pass = Console.ReadLine ().ToString ();}
            Console.WriteLine ("Pass set to => " + pass + "\nStart login ...\n");
            try{
                TcpClient client = new TcpClient("52.20.205.154", 443);
                SslStream sslStream = new SslStream(client.GetStream(),false,new RemoteCertificateValidationCallback(ValidateServerCertificate),null);
                try{sslStream.AuthenticateAsClient("instagram.com");}
                catch (AuthenticationException e){
                Console.WriteLine("Authentication failed with instagram.com\npress any key to exit ..");
                client.Close();
                Console.ReadKey();
                return;}
                #region "Get Cookies"
                byte[] messsage = Encoding.UTF8.GetBytes(request1);
                sslStream.Write(messsage);
                sslStream.Flush();
                byte[] buffer = new byte[client.ReceiveBufferSize];
                String head="";
                while(!(head.Contains("</html>"))){
                        sslStream.Read(buffer, 0, buffer.Length);
                        head+=System.Text.Encoding.UTF8.GetString(buffer);
                    }

                csrftoken = head.Substring(head.IndexOf("csrftoken=") + "csrftoken=".Length);
                csrftoken = csrftoken.Substring(0, csrftoken.IndexOf(";") - 0);
                mid = head.Substring(head.IndexOf("mid=") + "mid=".Length);
                mid = mid.Substring(0, mid.IndexOf(";") - 0);
                cooks+= "mid="+mid+";csrftoken="+csrftoken;
                head="";
                #endregion
                #region "Login"
                string x="username=" + id + "&password=" + pass ;
                var request2 = "POST /accounts/login/ajax/" + " HTTP/1.1\r\n" +
                    "Host: www.instagram.com\r\n" +
                    "User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:31.0) Gecko/20100101 Firefox/31.0 Iceweasel/31.3.0\r\n"+
                    "Referer: https://www.instagram.com/\r\n"+
                    "Content-Type: application/x-www-form-urlencoded; charset=UTF-8\r\n"+
                    "X-CSRFToken: " + csrftoken + "\r\n"+
                    "Cookie: " + cooks +"\r\n"+
                    "Content-Length: " + x.Length.ToString()+"\r\n\r\n"+
                    x;
                messsage = Encoding.UTF8.GetBytes(request2);
                sslStream.Write(messsage);
                sslStream.Flush();
                buffer = new byte[2048];
                head="";
                sslStream.Read(buffer, 0, buffer.Length);
                head=System.Text.Encoding.UTF8.GetString(buffer);
                if(head.Contains("\"authenticated\": false")){
                    Console.WriteLine("Login faild\nPress any key to exit..");
                    Console.ReadKey();
                    client.Close();
                    return;
                }
                else if(head.Contains("\"authenticated\": true")){
                    Console.WriteLine("Login Ok\nPress any key to exit..");
                    Console.ReadKey();
                    client.Close();
                    return;
                }
                else{
                    Console.WriteLine("Bad status\nPress any key to exit..");
                    Console.ReadKey();
                    client.Close();
                    return;
                }
                #endregion
            }catch{
                Console.WriteLine("Error in request\nPress any key to exit..");
                Console.ReadKey();
                return;
            }
        }
    }
}