tree 281c3d80d1265fa344fffe460d4e45509fba0e3e
parent 532737df65330200dc55ae42d31140d19c4024be
author Alex Klyubin <klyubin@google.com> 1436373083 -0700
committer Alex Klyubin <klyubin@google.com> 1437065991 -0700

HMAC keys are authorized for exactly one digest.

This is in preparation for enforcing the minimum length of MACs
which in the case of HMAC keys generated or imported by Android
Keystore will be set to the length of the digest for which the
key is authorized.

Bug: 22337277
Change-Id: I0255d5ba184dabfb6b45d8f32ddadeb84ab7fc19