public void CancelFingerprint()
{
if (cancellationSignal != null)
{
cancellationSignal.Cancel();
}
}
public override void OnAuthenticationError(int errMsgId, ICharSequence errString)
{
bool reportError = (errMsgId == (int)FingerprintState.ErrorCanceled);
string debugMsg = $"OnAuthenticationError: {errMsgId}:`{errString}`.";
if (reportError)
{
debugMsg += (errMsgId, errString.ToString());
debugMsg += " Reporting the error.";
}
else
{
debugMsg += " Ignoring the error.";
}
Console.WriteLine(debugMsg);
if (_tcsWeak.TryGetTarget(out var tcs))
{
tcs.TrySetResult(new AuthenticationResult(false, debugMsg));
}
_cancellationSignal?.Cancel();
_cancellationSignal?.Dispose();
_cancellationSignal = null;
_dialog.Dismiss();
}
internal void CancelAuthentication()
{
cancellationSignal?.Cancel();
newCancelSignal?.Cancel();
newCancelSignal = null;
cancellationSignal = null;
}
public void CancelCurrentAuthentication()
{
cancellationSignal.Cancel();
Device.BeginInvokeOnMainThread(() =>
{
Xamarin.Forms.Application.Current.MainPage.Navigation.PopAllPopupAsync();
});
}
/// <summary>
/// Stops the authentication.
/// </summary>
public void StopAuthentication()
{
if (mCancellationSignal != null)
{
mCancellationSignal.Cancel();
mCancellationSignal = null;
}
}
public void CancelCurrentAuthentication()
{
MessagingCenter.Unsubscribe <string, string>("FingerprintAuthentication", "Authenticate");
cancellationSignal.Cancel();
Device.BeginInvokeOnMainThread(() =>
{
Xamarin.Forms.Application.Current.MainPage.Navigation.PopPopupAsync();
});
}
void ReportAuthenticationFailed(string errorMessage)
{
System.Diagnostics.Debug.WriteLine(errorMessage);
if (_tcsWeak.TryGetTarget(out var tcs))
{
tcs.TrySetResult(new AuthenticationResult(false, errorMessage));
}
_cancellationSignal.Cancel();
_dialog.Dismiss();
}
public override async Task <SecureFingerprintAuthenticationResult> AuthenticateSecureNoDialogAsync(IAuthenticationFailedListener failedListener, string key, CancellationToken cancellationToken)
{
using (var cancellationSignal = new Android.Support.V4.OS.CancellationSignal())
using (cancellationToken.Register(() => cancellationSignal.Cancel()))
{
CryptoObjectHelper crypto = new CryptoObjectHelper();
var callback = new SecureFingerprintAuthenticationCallback(failedListener, key);
GetServiceCompat().Authenticate(crypto.BuildCryptoObject(), (int)FingerprintAuthenticationFlags.None, cancellationSignal, callback, null);
return(await callback.GetTask());
}
}
public static async System.Threading.Tasks.Task Authenticate(DialogConfiguration dialogConfiguration)
{
//Android 10+ Q SdkInt 29+
if ((int)Build.VERSION.SdkInt >= 29)
{
CancellationSignal BiometricCancellationSignal = new CancellationSignal();
//Android 10
BiometricCancellationSignal = new CancellationSignal();
BiometricPrompt biometricPrompt;
if (dialogConfiguration.IsUseAlternativeAuthentication)
{
//Allow using PIN / Passcode as alternative, will disable crypto in authentication
biometricPrompt = new BiometricPrompt
.Builder(Configuration.CurrentActivity)
.SetTitle(dialogConfiguration.DialogTitle)
.SetDescription(dialogConfiguration.DialogDescription)
.SetDeviceCredentialAllowed(true)
.Build();
}
else
{
biometricPrompt = new BiometricPrompt
.Builder(Configuration.CurrentActivity)
.SetTitle(dialogConfiguration.DialogTitle)
.SetDescription(dialogConfiguration.DialogDescription)
.SetNegativeButton(dialogConfiguration.AlternativeActionMessage, Configuration.CurrentActivity.MainExecutor, new NegativeButtonOnClickListener(() =>
{
BiometricCancellationSignal.Cancel();
dialogConfiguration.AlternativeAction?.Invoke();
}))
.Build();
}
BiometricPrompt.AuthenticationCallback authenticationCallback = new BiometricAuthenticationCallback();
AuthenticationResult = null;
AuthenticationResult = (arg) =>
{
string result = arg;
if (arg == SystemMessages.Success)
{
BiometricCancellationSignal.Cancel();
dialogConfiguration.SuccessAction?.Invoke();
}
else if (arg == SystemMessages.Error)
{
BiometricCancellationSignal.Cancel();
dialogConfiguration.FailedAction?.Invoke();
}
};
if (dialogConfiguration.IsUseAlternativeAuthentication)
{
//Secret key is not allowed to use when SetDeviceCredentialAllowed is true
biometricPrompt.Authenticate(BiometricCancellationSignal, Configuration.CurrentActivity.MainExecutor, authenticationCallback);
}
else
{
if (Configuration.IsUseSecretKey)
{
CryptoObjectHelper cryptoHelper = new CryptoObjectHelper();
biometricPrompt.Authenticate(cryptoHelper.BuildBiometricPromptCryptoObject(), BiometricCancellationSignal, Configuration.CurrentActivity.MainExecutor, authenticationCallback);
}
else
{
biometricPrompt.Authenticate(BiometricCancellationSignal, Configuration.CurrentActivity.MainExecutor, authenticationCallback);
}
}
}
//Android 9+ P SdkInt 28
else if ((int)Build.VERSION.SdkInt >= 28)
{
//Android 9
try
{
CancellationSignal BiometricCancellationSignal = new CancellationSignal();
BiometricPrompt biometricPrompt;
biometricPrompt = new BiometricPrompt
.Builder(Configuration.CurrentActivity)
.SetTitle(dialogConfiguration.DialogTitle)
.SetDescription(dialogConfiguration.DialogDescription)
.SetNegativeButton(dialogConfiguration.AlternativeActionMessage, Configuration.CurrentActivity.MainExecutor, new NegativeButtonOnClickListener(() =>
{
BiometricCancellationSignal.Cancel();
dialogConfiguration.AlternativeAction?.Invoke();
}))
.Build();
BiometricCancellationSignal = new CancellationSignal();
BiometricPrompt.AuthenticationCallback authenticationCallback = new BiometricAuthenticationCallback();
AuthenticationResult = null;
AuthenticationResult = (arg) =>
{
string result = arg;
if (arg == SystemMessages.Success)
{
BiometricCancellationSignal.Cancel();
dialogConfiguration.SuccessAction?.Invoke();
}
else if (arg == SystemMessages.Error)
{
BiometricCancellationSignal.Cancel();
dialogConfiguration.FailedAction?.Invoke();
}
};
if (Configuration.IsUseSecretKey)
{
CryptoObjectHelper cryptoHelper = new CryptoObjectHelper();
biometricPrompt.Authenticate(cryptoHelper.BuildBiometricPromptCryptoObject(), BiometricCancellationSignal, Configuration.CurrentActivity.MainExecutor, authenticationCallback);
}
else
{
biometricPrompt.Authenticate(BiometricCancellationSignal, Configuration.CurrentActivity.MainExecutor, authenticationCallback);
}
}
catch (Exception ex)
{
Configuration.CurrentActivity.RunOnUiThread(() =>
{
Toast.MakeText(Configuration.CurrentActivity, $"Throw exception : {ex.Message}", ToastLength.Long).Show();
});
}
}
//Android 6+ to 8.x SdkInt 23
else if ((int)Build.VERSION.SdkInt >= 23)
{
//Android 6+ to 8.x
FingerprintManagerCompat fingerprintManager = FingerprintManagerCompat.From(Configuration.CurrentActivity);
const int flags = 0; /* always zero (0) */
CryptoObjectHelper cryptoHelper = new CryptoObjectHelper();
// Using the Support Library classes for maximum reach
FingerprintManagerCompat fingerPrintManager = FingerprintManagerCompat.From(Configuration.CurrentActivity);
// AuthCallbacks is a C# class defined elsewhere in code.
Android.Support.V4.OS.CancellationSignal FingerprintCancellationSignal = new Android.Support.V4.OS.CancellationSignal();
FingerprintManagerCompat.AuthenticationCallback authenticationCallback = new AuthenticationCallBack();
Android.Support.V4.App.FragmentTransaction transcation = ((FragmentActivity)Configuration.CurrentActivity).SupportFragmentManager.BeginTransaction();
FingerprintDialog fingerprintDialog = new FingerprintDialog(dialogConfiguration, authenticationCallback, FingerprintCancellationSignal);
fingerprintDialog.Show(transcation, "Dialog Fragment");
AuthenticationResult = null;
AuthenticationResult = (arg) =>
{
string result = arg;
if (arg == SystemMessages.Success)
{
FingerprintCancellationSignal.Cancel();
dialogConfiguration.SuccessAction?.Invoke();
}
else if (arg == SystemMessages.Error)
{
FingerprintCancellationSignal.Cancel();
dialogConfiguration.FailedAction?.Invoke();
}
};
try
{
fingerprintManager.Authenticate(cryptoHelper.BuildFingerprintManagerCompatCryptoObject(), flags, FingerprintCancellationSignal, authenticationCallback, null);
}
catch (Exception ex)
{
Toast.MakeText(Configuration.CurrentActivity, $"Throw exception : {ex.Message}", ToastLength.Long);
}
}
}
