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smstuebe / xamarin-fingerprint

Xamarin and MvvMCross plugin for authenticate a user via fingerprint sensor
Microsoft Public License
490 stars 115 forks source link

Detect Changed Fingerprint #131

Closed marcuskammerlander closed 2 years ago

marcuskammerlander commented 5 years ago

To help us fix your issue, please provide the information in the below template. If something causes a crash, provide as much information as you can gather. Just imagine: we do not know what you are doing!

Note: There is often little we can do without a minimal reproducible sample of the issue, so please provide that in a standalone git repository and link it here.

Steps to reproduce

  1. Integrate Plugin in App

  2. Activate and use Plugin to Authenticate

  3. Change Fingerprint in System

Expected behavior

Plugin should throw exception "Biometric Data has changed"

Actual behavior

you can still use Fingerprint

smsissuechecker commented 5 years ago

Hi @marcuskammerlander,

I'm the friendly issue checker. It seems like (62.50 %) you haven't used our issue template :cry: I think it is very frustrating for the repository owners, if you ignore them.

If you think it's fine to make an exception, just ignore this message. But if you think it was a mistake to delete the template, please close the issue and create a new one.

Thanks!

Phenek commented 5 years ago

Hey @marcuskammerlander I don't understand your expected exception. The function AuthenticateAsync have to be called one time at the login for example. The result is kind of immediate, the Fingerprint has no time to be changed at this time.

So maybe your are searching for an event that will fire when a new fingerprint is added or removed? Did you check if it's possible to implement this kind of event on iOS and Android too? Let me know. Regards,

GuidoNeele commented 5 years ago

I think what he meant is, if you add or remove a fingerprint in the system settings then you should be able to detect if this has happend or not. That way you can force the user to reactivate biometrics for your app.

https://stackoverflow.com/questions/44515668/android-fingerprint-detect-new-finger-added https://stackoverflow.com/questions/38397477/touchid-detect-new-fingerprints-added-when-does-evaluatedpolicydomainstate-c

marcuskammerlander commented 5 years ago

@Phenek @GuidoNeele is right. That is exactly what i mentioned

mshuf commented 3 years ago

+1

@marcuskammerlander This feature request has been inactive for some time. Did you achieve a work-around?