pkey_cmac_ctrl
return pkey_cmac_ctrl(ctx, EVP_PKEY_CTRL_SET_MAC_KEY,
return pkey_cmac_ctrl(ctx, EVP_PKEY_CTRL_CIPHER, -1, (void *)c);
r = pkey_cmac_ctrl(ctx, EVP_PKEY_CTRL_SET_MAC_KEY, keylen, key);
.ctrl = pkey_cmac_ctrl,