X509_TRUST_get_by_id
idx = X509_TRUST_get_by_id(id);
if (X509_TRUST_get_by_id(trust) == -1) {
idx = X509_TRUST_get_by_id(id);
idx = X509_TRUST_get_by_id(trust);
int X509_TRUST_get_by_id(int id);