/// <summary>
/// Shows the fingerprint prompt without CryptoObject and allows the user to use the device PIN and password authentication.
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void OnClickFingerAuthWithoutCrpObj(object sender, EventArgs e)
{
string Tag = "OnClickFingerAuthWithoutCrpObj";
// Checks whether fingerprint authentication is available.
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(CharSequence) 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();
log.Info(Tag, "Start fingerprint authentication without CryptoObject.\nAuthenticating......\n");
bioAuthnPrompt.Auth(info);
}
/// <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();
}