HMAC-SHA256 is a perfectly fine MAC algorithm, and there is no need to ask the user to choose one. This does break compatibility with the previous API, but it had been live only for a weekend, so hopefully still in a window in which we can make changes with a limited blast radius. Updates golang/go#41430 Change-Id: I03741a545b25b9fcc147760cd20e9d7029844a6c Reviewed-on: https://go-review.googlesource.com/c/crypto/+/279453 Trust: Filippo Valsorda <filippo@golang.org> Run-TryBot: Filippo Valsorda <filippo@golang.org> TryBot-Result: Go Bot <gobot@golang.org> Reviewed-by: James Kasten <jdkasten@google.com> Reviewed-by: Roland Shoemaker <roland@golang.org>