internal void StartAuthentication(FingerprintManagerCompat fingerprintManager, FingerprintManagerCompat.CryptoObject cryptoObject)
{
CancellationSignal cancellationSignal = new CancellationSignal();
fingerprintManager.Authenticate(cryptoObject, 0, cancellationSignal, this, null);
}
public Task <bool> AuthenticateUserIDWithTouchID()
{
var tcs = new TaskCompletionSource <bool>();//used to wait the mainUI to get the response of the touchId
KeyguardManager keyguardManager = (KeyguardManager)context.GetSystemService(Context.KeyguardService);
FingerprintManagerCompat fingerprintManager = FingerprintManagerCompat.From(context);
if (Build.VERSION.SdkInt >= BuildVersionCodes.P)
{
if (ActivityCompat.CheckSelfPermission(context, Manifest.Permission.UseBiometric)
!= (int)Android.Content.PM.Permission.Granted)
{
return(tcs.Task);
}
if (!fingerprintManager.IsHardwareDetected)
{
Toast.MakeText(context, "FingerPrint authentication permission not enable", ToastLength.Short).Show();
}
else
{
if (!fingerprintManager.HasEnrolledFingerprints)
{
Toast.MakeText(context, "Register at least one fingerprint in Settings", ToastLength.Short).Show();
}
else
{
if (!keyguardManager.IsKeyguardSecure)
{
Toast.MakeText(context, "Lock screen security not enable in Settings", ToastLength.Short).Show();
}
else
{
GenKey();
}
if (CipherInit())
{
FingerprintManagerCompat.CryptoObject cryptoObject = new FingerprintManagerCompat.CryptoObject(cipher);
BiometricHandler handler = new BiometricHandler(context);
handler.StartAuthentication(fingerprintManager, cryptoObject);
}
}
}
}
else if (Build.VERSION.SdkInt >= BuildVersionCodes.M)
{
if (ActivityCompat.CheckSelfPermission(context, Manifest.Permission.UseFingerprint)
!= (int)Android.Content.PM.Permission.Granted)
{
return(tcs.Task);
}
if (!fingerprintManager.IsHardwareDetected)
{
Toast.MakeText(context, "FingerPrint authentication permission not enable", ToastLength.Short).Show();
}
else
{
if (!fingerprintManager.HasEnrolledFingerprints)
{
Toast.MakeText(context, "Register at least one fingerprint in Settings", ToastLength.Short).Show();
}
else
{
if (!keyguardManager.IsKeyguardSecure)
{
Toast.MakeText(context, "Lock screen security not enable in Settings", ToastLength.Short).Show();
}
else
{
GenKey();
}
if (CipherInit())
{
FingerprintManagerCompat.CryptoObject cryptoObject = new FingerprintManagerCompat.CryptoObject(cipher);
BiometricHandler handler = new BiometricHandler(context);
handler.StartAuthentication(fingerprintManager, cryptoObject);
}
}
}
}
else
{
return(tcs.Task);
}
tcs.SetResult(IsAutSucess);
return(tcs.Task);
}
