Add PIN and fingerprint

[matejsmycka]

if #39 gets merged.

It will be easy to extend the client with a PIN.

Fingerprint will require more handling but still easier than previous implementation.

However, a good approach is for the user to supply flags about which version he would like.
But I am open to discussion.

Connected to #25

[psanford]

Adding UserVerification needs to be part of a bigger effort of supporting ctap 2.0.

[matejsmycka]

Oh, so it cannot be a classic challenge response handled by the tpm-fido in memory?

EDIT: that would not be secure...

[matejsmycka]

@psanford Do you plan to update this project? Otherwise, I will put in no more effort.

I like this tool a lot, and it would be a shame.

[psanford]

Like I said, the next thing that needs to be done is adding support for ctap 2.0. I am not actively working on that at the moment. If someone wants to implement that (probably as a separate library) I would be open to integrating it into tpm-fido

[ng8weji9vowdv]

@psanford can this project be considered as a virtual fido2 implementation or no?