public ActionResult Login(string keyHandle)
{
var model = new LoginDeviceViewModel { KeyHandle = keyHandle };
try
{
var u2f = new FidoUniversalTwoFactor();
var appId = new FidoAppId(Request.Url);
var deviceRegistration = GetFidoRepository().GetDeviceRegistrationsOfUser(GetCurrentUser()).FirstOrDefault(x => x.KeyHandle.ToWebSafeBase64() == keyHandle);
if (deviceRegistration == null)
{
ModelState.AddModelError("", "Unknown key handle: " + keyHandle);
return View(model);
}
var startedRegistration = u2f.StartAuthentication(appId, deviceRegistration);
model = new LoginDeviceViewModel
{
AppId = startedRegistration.AppId.ToString(),
Challenge = startedRegistration.Challenge,
KeyHandle = startedRegistration.KeyHandle.ToWebSafeBase64(),
UserName = GetCurrentUser()
};
}
catch (Exception ex)
{
ModelState.AddModelError("", ex.GetType().Name + ": " + ex.Message);
}
return View(model);
}
public ActionResult Login(LoginDeviceViewModel model)
{
model = model ?? new LoginDeviceViewModel();
try
{
if (!String.IsNullOrEmpty(model.RawAuthenticationResponse))
{
var u2f = new FidoUniversalTwoFactor();
var appId = new FidoAppId(Request.Url);
var deviceRegistration = GetFidoRepository().GetDeviceRegistrationsOfUser(GetCurrentUser()).FirstOrDefault(x => x.KeyHandle.ToWebSafeBase64() == model.KeyHandle);
if (deviceRegistration == null)
{
ModelState.AddModelError("", "Unknown key handle: " + model.KeyHandle);
return View(new LoginDeviceViewModel());
}
var challenge = model.Challenge;
var startedAuthentication = new FidoStartedAuthentication(appId, challenge,
FidoKeyHandle.FromWebSafeBase64(model.KeyHandle ?? ""));
var counter = u2f.FinishAuthentication(startedAuthentication, model.RawAuthenticationResponse, deviceRegistration, GetTrustedDomains());
// save the counter somewhere, the device registration of the next authentication should use this updated counter
deviceRegistration.Counter = counter;
return RedirectToAction("LoginSuccess");
}
}
catch (Exception ex)
{
ModelState.AddModelError("", ex.GetType().Name + ": " + ex.Message);
}
return View(model);
}
