private void OnClickFaceAuthWithCrpObj(object sender, EventArgs e)
{
string Tag = "FaceAuthWithCrpObj";
Android.Content.PM.Permission permissionCheck = Android.Content.PM.Permission.Granted;
if (Build.VERSION.SdkInt >= BuildVersionCodes.M)
{
permissionCheck = CheckSelfPermission(Manifest.Permission.Camera);
}
if (permissionCheck != Android.Content.PM.Permission.Granted)
{
log.Info(Tag, "The camera permission is not enabled. Please enable it.");
// request camera permissions
if (Build.VERSION.SdkInt >= BuildVersionCodes.M)
{
RequestPermissions(new string[] { Manifest.Permission.Camera }, 1);
}
return;
}
BioAuthnCallback callback = new FidoBioAuthnCallback();
// Cancellation Signal
CancellationSignal cancellationSignal = new CancellationSignal();
FaceManager faceManager = new FaceManager(this);
Log.Info("HasEnrolledTemplates", faceManager.HasEnrolledTemplates.ToString());
Log.Info("IsHardwareDetected", faceManager.IsHardwareDetected.ToString());
Log.Info("CanAuth", faceManager.CanAuth().ToString());
log.Info(Tag, $"IsHardwareDetected:{faceManager.IsHardwareDetected}");
// Checks whether 3D facial authentication can be used.
int errorCode = faceManager.CanAuth();
if (errorCode != 0)
{
log.Info(Tag, "Can not authenticate. errorCode=" + errorCode);
return;
}
// flags
int flags = 0;
// Authentication messsage handler.
Handler handler = null;
// Recommended CryptoObject to be set to null. KeyStore is not associated with face authentication in current
// version. KeyGenParameterSpec.Builder.SetUserAuthenticationRequired() must be set false in this scenario.
CryptoObject crypto = null;
log.Info(Tag, "Start face authentication.\nAuthenticating......\n");
faceManager.Auth(crypto, cancellationSignal, flags, callback, handler);
}
private BioAuthnPrompt CreateBioAuthnPrompt()
{
BioAuthnCallback callback = new FidoBioAuthnCallback();
return(new BioAuthnPrompt(this, ContextCompat.GetMainExecutor(this), callback));
}
