X509_STORE_load_path
if (vfyCApath != NULL && !X509_STORE_load_path(vfy, vfyCApath))
if (chCApath != NULL && !X509_STORE_load_path(ch, chCApath))
if (path != NULL && !X509_STORE_load_path(ctx, path))
int X509_STORE_load_path(X509_STORE *xs, const char *path);
if (CApath != NULL && !X509_STORE_load_path(*st, CApath))
return X509_STORE_load_path(ctx->cert_store, CApath);