poly1305_set_ctx_params
{ OSSL_FUNC_MAC_SET_CTX_PARAMS, (void (*)(void))poly1305_set_ctx_params },
static OSSL_FUNC_mac_set_ctx_params_fn poly1305_set_ctx_params;
if (!ossl_prov_is_running() || !poly1305_set_ctx_params(ctx, params))