private string GetQRCodeUrl()
{
// https://code.google.com/p/google-authenticator/wiki/KeyUriFormat
var base32Secret = Base32.Encode(secret);
return(String.Format("https://www.google.com/chart?chs=200x200&chld=M|0&cht=qr&chl=otpauth://totp/{0}%3Fsecret%3D{1}", Identity, base32Secret));
}
public MainWindow()
{
InitializeComponent();
DataContext = this;
var timer = new DispatcherTimer();
timer.Interval = TimeSpan.FromMilliseconds(500);
timer.Tick += (s, e) => SecondsToGo = 30 - Convert.ToInt32(DateTimeOffset.UtcNow.ToUnixTimeSeconds() % 30);
timer.IsEnabled = true;
secret = new byte[] { 0x48, 0x65, 0x6C, 0x6C, 0x6F, 0x21, 0xDE, 0xAD, 0xBE, 0xEF };
Secret = Base32.Encode(secret);
Identity = "*****@*****.**";
QRCodeUrl = GetQRCodeUrl();
}
