SHA384 is a natural hashing choice for P-384 ECDSA. The only thing needed to make it usable, is adding it to the list of candidates. Change-Id: I61f66f371774f95dfc1de30d10fab66f92c21b6b Reviewed-on: https://go-review.googlesource.com/c/137956 Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org> Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org> TryBot-Result: Gobot Gobot <gobot@golang.org>