tree 08b2fa42295d1888a0e33a664bd46b6c65707349
parent a36ffbe0bbccbc2173589da1941dd39ee01a8004
author Shawn Willden <swillden@google.com> 1436357092 -0600
committer Shawn Willden <swillden@google.com> 1436976479 -0600

Add KM_TAG_MIN_MAC_LENGTH.

This allows the binding of minimum length for MACs or tags to HMAC keys
and AEAD symmetric keys.  Later attempts to use these keys with a
shorter MAC or tag specification (provided to begin() with
KM_TAG_MAC_LENGTH) will fail with KM_ERROR_INVALID_MAC_LENGTH.

Bug: 22337277
Change-Id: Ic5292ce01bdd6ecde25aad115e4b407aadc85f23