OSSL_STORE_find
if (!OSSL_STORE_find(store_ctx, search)) {
OSSL_STORE_find(ctx, criterion);
int OSSL_STORE_find(OSSL_STORE_CTX *ctx, const OSSL_STORE_SEARCH *search);
&& TEST_true(OSSL_STORE_find(sctx, search))
&& TEST_false(OSSL_STORE_find(sctx, NULL))
&& TEST_true(OSSL_STORE_find(sctx, search));