How to retrieve public key from attestationObject in java

Question

I am getting attestationObject: ArrayBuffer(648) from registartion process. I want to fetch the public key from attestationObject.

Tell us what you have tried and show logs or results and Read: https://stackoverflow.com/help/how-to-ask — jwilleke, Nov 25 '20 at 10:21

score 0 · Answer 1 · answered Oct 28 '20 at 09:59

This is not really a trivial topic. I'd suggest looking at existing implementations and either using them if you can or at least look at their code to see how they've done it.

A Java one: https://github.com/webauthn4j/webauthn4j

A .Net one: https://github.com/abergs/fido2-net-lib

Spec: https://www.w3.org/TR/webauthn/#attestation-object

score 0 · Answer 2 · answered Nov 24 '20 at 14:08

0

Here is the structure

Suggest reading my article on verifying FIDO2 responses https://herrjemand.medium.com/verifying-fido2-responses-4691288c8770

answered Nov 24 '20 at 14:08

Ackermann Yuriy

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How to retrieve public key from attestationObject in java

2 Answers2