[v15] Add UserVerification capabilities to LoginFlow #38487
Merged
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Backport #37963 to branch/v15.
Add user verification capabilities to "logged in" challenges, as in those issued by wanlib.LoginFlow.
We take advantage of mfav1.ChallengeExtensions by adding a user verification option that is orthogonal to the challenge scope, so that challenges may be issued with or without UV requirements based on external factors (like the user actually having a password).
LoginFlow is used for those challenges, instead of PasswordlessFlow, as the former already works with the logged in user, issues challenges with a larger timeout and has all the correct parameters in its API. PasswordlessFlow is meant only for discoverable logins, as in logins where the user is not yet known.
This is related to and meant to facilitate RFD 0159 - Password Status.