alloc_shash
err = alloc_shash(driver, type, mask, &stfm, &desc);
rv = alloc_shash(&crypto->csums_tfm, new_net_conf->csums_alg,
rv = alloc_shash(&crypto->verify_tfm, new_net_conf->verify_alg,
rv = alloc_shash(&crypto->integrity_tfm, new_net_conf->integrity_alg,
rv = alloc_shash(&crypto->cram_hmac_tfm, hmac_name,