Matt Caswell 2674af2f79 Ensure that both the MD and key have been initialised before attempting to
create an HMAC

Inspired by BoringSSL commit 2fe7f2d0d9a6fcc75b4e594eeec306cc55acd594

Reviewed-by: Richard Levitte <levitte@openssl.org>

Conflicts:
	crypto/hmac/hmac.c
2015-03-25 13:01:04 +00:00
..
2015-03-25 13:01:04 +00:00
2014-01-06 13:33:27 +00:00