public bool login2auth(string authkod)
{
    bool flag = Operators.CompareString(this.authCode, "", false) == 0;
    if (flag)
    {
        bool flag2 = Operators.CompareString(authkod, "", false) == 0;
        if (flag2)
        {
            this.authCode = Interaction.InputBox("Please enter your secret key", "NETGuard Desktop Application", "", -1, -1);
        }
        else
        {
            this.authCode = authkod;
        }
    }
    WebClient webClient = new WebClient();
    webClient.Headers.Add("user-agent", "NETGuard.IO");
    webClient.Proxy = null;
    string data = webClient.DownloadString("https://netguard.io/API/login2auth.php?username=" + this.Username + "&start=netguard");
    string text = NetGuardApi.xor_this(data, this.authCode);
    this.tmpIV = text.Split(new char[]
    {
        '{'
    })[0];
    this.tmpsalt = text.Replace(this.tmpIV + "{0}", string.Empty);
    string username = this.Username;
    string decryptedtext = this.encode(this.encode(this.Password));
    string stringToEscape = NetGuardApi.AESEncrypt(decryptedtext, this.tmpsalt, this.tmpIV);
    webClient.Headers.Add("user-agent", "NETGuard.IO");
    webClient.Proxy = null;
    string encryptedtext = webClient.DownloadString("https://netguard.io/API/login2auth.php?username=" + username + "&password=" + Uri.EscapeDataString(stringToEscape));
    string text2 = NetGuardApi.AESDecrypt(encryptedtext, this.tmpsalt, this.tmpIV);
    bool flag3 = text2.Contains("Welcome");
    bool result;
    if (flag3)
    {
        string[] array = text2.Split(new char[]
        {
            '|'
        });
        this.CurrentPoint = array[2];
        bool flag4 = array.Count<string>() > 3;
        if (flag4)
        {
            this.isBeta = true;
        }
        else
        {
            this.isBeta = false;
        }
        result = true;
    }
    else
    {
        Interaction.MsgBox("Wrong password!", MsgBoxStyle.OkOnly, null);
        result = false;
    }
    return result;
}