crypto: digest: speficied when a digest need a key to be used
such as for hmac(xxx) you must provide a key
This will allow to enforce the correct parameter at digest command
<digest>sum is not impacted
Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>