const OSSL_PARAM *OSSL_FUNC_keymgmt_import_types_ex(void *provctx, int selection);
int OSSL_FUNC_keymgmt_export(void *keydata, int selection,
                             OSSL_CALLBACK *param_cb, void *cbarg);
const OSSL_PARAM *OSSL_FUNC_keymgmt_export_types(int selection);
const OSSL_PARAM *OSSL_FUNC_keymgmt_export_types_ex(void *provctx, int selection);

/* Key object duplication, a constructor */
void *OSSL_FUNC_keymgmt_dup(const void *keydata_from, int selection);

/* Key object validation */
int OSSL_F