tree e45b4d16c9f9c23a459a21cb75f0e39445f32d72
parent 7d05d88dc44b18e0350f7fe8d28c20f2f643bb80
author Shawn Willden <swillden@google.com> 1436366845 -0600
committer Shawn Willden <swillden@google.com> 1437068700 -0600

Add support for KM_TAG_MIN_MAC_LENGTH.

HMAC and AES-GCM keys must be bound to a mininum MAC/tag length at
creation, and operations may not specify a length smaller than the
minimum, or provide a length smaller than the minimum during
verification.

Bug: 22337277
Change-Id: Id5ae2f4259045ba1418c28e9de8f4a47e67fd433