commit 1abf6643628c17a905420f9366adf04a84f3ebf6
author Martin Kreichgauer <martinkr@google.com> Thu Aug 30 14:55:29 2018
committer Commit Bot <commit-bot@chromium.org> Thu Aug 30 14:55:29 2018
tree 3b73e5d9e010ee5ba0377b52de4e250d8b2f0191
parent f35716acc47c474ef6d291c14d1bb113c2be8b5d

webauthn: prevent UI from dispatching to the same authenticator multiple times

Using the transport switch drop-down menu, it is possible to cycle away
from and then back to the Touch ID sheet, which currently causes the
request to be dispatched onto the TouchIdAuthenticator each time the
sheet is shown. This sort of works in the production build (it restarts
the request, which will make the Touch ID dialog disappear and then
reappear). In debug, however, it crashes on a DCHECK.

We haven't defined whether a FidoAuthenticator should be able to handle
multiple invocations of MakeCredential/GetAssertion over the lifetime of
the instance. Hence, the UI should stop doing this.

Bug: 678128,847985
Change-Id: Id008de98bc8aa6477e9863ca2e22cd136316b423
Reviewed-on: https://chromium-review.googlesource.com/1196427
Commit-Queue: Martin Kreichgauer <martinkr@google.com>
Reviewed-by: Balazs Engedy <engedy@chromium.org>
Cr-Commit-Position: refs/heads/master@{#587575}