[webauthn] Merged Pull Request: Only expose the UV PRF

agl has just merged agl's pull request 1836 for https://github.com/w3c/webauthn:

== Only expose the UV PRF ==
Authenticators may have different PRFs for the UV and non-UV case. Thus setting uv=preferred during an assertion is fraught: it doesn't fully specify which PRF to use.

However, while implementing this, I ended up feeling that the prohibition on using uv=preferred was too strong. Sites may reasonably want to use uv=preferred and to take advantage of available PRF results. If the evaluation points are global then this isn't so silly as to justify a prohibition, I suspect.

Fixes #1851.

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See https://github.com/w3c/webauthn/pull/1836

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Received on Wednesday, 22 March 2023 19:37:02 UTC