n2_crypto: Add HMAC support.

One note is that, unlike with non-HMAC hashes, we can't support
hmac(sha224) using the HMAC_SHA256 opcode.

Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David S. Miller 2010-05-22 22:53:09 -07:00
commit dc4ccfd15d