I have went through the local_auth package and it works fine, but it does not have an option to authenticate with password or pin. Help appreciated!
String _authorized = 'Not Authorized';//Start
Future<Null> _authenticate() async {
final LocalAuthentication auth = new LocalAuthentication();
bool authenticated = false;
try {
authenticated = await auth.authenticateWithBiometrics(
localizedReason: 'Scan your fingerprint to authenticate',
useErrorDialogs: true,
stickyAuth: false);
authenticated = await auth.authenticateWithBiometrics(localizedReason: 'Authenticate');
} on PlatformException catch (e) {
print(e);
}
if (!mounted) return;
setState(() {
_authorized = authenticated ? 'Authorized' : 'Not Authorized';
});
}//End
So this is the example code and you can use biometric authentication but what about the default Pin/Password authentication that is also present with fingerprint.
For security reason, mobile (iOS/Android) will only authenticate user by biometrics, not system password/pin. If you want to let user authenticate by other methods than biometrics, the app itself must store and process (encrypted) credential which is totally separated from system password/pin.
You can see this behavior (to use system-biometrics AND app-specific credential) in many bank/financial related app, such as https://play.google.com/store/apps/details?id=com.konylabs.capitalone&hl=en
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