do_hmac
result = do_hmac(sha1_hmac_mech,
do_hmac(crypto_mech_type_t, crypto_key_t *, char *, int, char *, int);
result = do_hmac(sha1_hmac_mech,
result = do_hmac(md5_hmac_mech,
result = do_hmac(md5_hmac_mech, &k1,
result = do_hmac(md5_hmac_mech,
result = do_hmac(md5_hmac_mech,
result = do_hmac(md5_hmac_mech, &k2,
result = do_hmac(md5_hmac_mech, &k1,