octcrypto_authenc_hmac
int octcrypto_authenc_hmac(struct cryptop *, struct cryptodesc *,
error = octcrypto_authenc_hmac(crp, crd, crd2, ses);
error = octcrypto_authenc_hmac(crp, crd2, crd, ses);
error = octcrypto_authenc_hmac(crp, crd, NULL, ses);
error = octcrypto_authenc_hmac(crp, NULL, crd, ses);