GitLab

In order to implement virtual CTAP2 security key we need to parse and
validate serialized GetAssertion request that the client sends to the
device. Add corresponding parsing logic.

Bug: 829413
Change-Id: Idd20a7b138ebaeda39b412824519750eccd7c673
Reviewed-on: https://chromium-review.googlesource.com/1110447
Commit-Queue: Jun Choi <hongjunchoi@chromium.org>
Reviewed-by: Jan Wilken Dörrie <jdoerrie@chromium.org>
Cr-Commit-Position: refs/heads/master@{#570629}