commit 5a72fd166414f1278c74ea00709280688b61a25e
author Marco Vanotti <mvanotti@google.com> Tue Oct 03 22:10:14 2017
committer chrome-bot <chrome-bot@chromium.org> Tue Oct 31 01:47:45 2017
tree 1a6e205fc534ab8987d24c4ed85b1cfcb95ea15b
parent 82e91c996576d2db69155b909bc367c43e11f2e5

attestationd: expose Hmac funcs in CryptoUtility.

We need to calculate HmacSha256 for attestation-based enrollment.
I am also exporting HmacSha512 for consistency.

BUG=chromium:641153
TEST=Unit tests

Change-Id: Ia36fe764bdae0a91bc4e20da09f4a8e59c60dac4
Reviewed-on: https://chromium-review.googlesource.com/741161
Commit-Ready: Pat Erley <perley@chromium.org>
Tested-by: Marco Vanotti <mvanotti@google.com>
Reviewed-by: Yves Arrouye <drcrash@chromium.org>
Reviewed-by: Andrey Pronin <apronin@chromium.org>