private void OnClickFingerAuthWithCrpObj(object sender, EventArgs e)
{
string Tag = "FingerAuthWithCrpObj";
int errorCode = fingerprintManager.CanAuth();
if (errorCode != 0)
{
log.Info(Tag, "Can not authenticate. errorCode=" + errorCode);
return;
}
// Construct CryptoObject.
Cipher cipher = new HwBioAuthnCipherFactory("hw_test_fingerprint", true).GetCipher();
if (cipher == null)
{
log.Info(Tag, "Failed to create Cipher object.");
return;
}
CryptoObject crypto = new CryptoObject(cipher);
log.Info(Tag, "Start fingerprint authentication with CryptoObject.\nAuthenticating......\n");
fingerprintManager.Auth(crypto);
}
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);
}
/// <summary>
/// Shows the fingerprint prompt with CryptoObject.
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void OnClickFingerAuthWithCrpObj(object sender, EventArgs e)
{
string Tag = "FingerAuthWithCrpObj";
BioAuthnManager bioAuthnManager = new BioAuthnManager(this);
int errorCode = bioAuthnManager.CanAuth();
if (errorCode != 0)
{
log.Info(Tag, "Can not authenticate. errorCode=" + errorCode);
return;
}
// build prompt info
BioAuthnPrompt.PromptInfo.Builder builder =
new BioAuthnPrompt.PromptInfo.Builder().SetTitle("This is the title.")
.SetSubtitle("This is the subtitle.")
.SetDescription("This is the description.");
// The user will first be prompted to authenticate with biometrics, but also given the option to
// authenticate with their device PIN, pattern, or password. SetNegativeButtonText(string) should
// not be set if this is set to true.
// builder.SetDeviceCredentialAllowed(true);
// Set the text for the negative button. SetDeviceCredentialAllowed(true) should not be set if this
// button text is set.
builder.SetNegativeButtonText("This is the 'Cancel' button.");
BioAuthnPrompt.PromptInfo info = builder.Build();
// Construct CryptoObject.
Cipher cipher = new HwBioAuthnCipherFactory("hw_test_fingerprint", true).GetCipher();
if (cipher == null)
{
log.Info(Tag, "Failed to create Cipher object.");
return;
}
CryptoObject crypto = new CryptoObject(cipher);
log.Info(Tag, "Start fingerprint authentication with CryptoObject.\nAuthenticating......\n");
// When user CryptoObject, BiometricPrompt.PromptInfo.Builder.SetDeviceCredentialAllowed(true) is not allow.
// Call BiometricPrompt.Authenticate(BiometricPrompt.PromptInfo info) if
// BiometricPrompt.PromptInfo.Builder.SetDeviceCredentialAllowed(true) is set to true.
Log.Info("CanAuth", bioAuthnManager.CanAuth().ToString());
bioAuthnPrompt.Auth(info, crypto);
Thread.Sleep(10000);
bioAuthnPrompt.CancelAuth();
}