load_cert_from_file
x = load_cert_from_file(bad_f);
X509 *cert = load_cert_from_file(filename); /* may result in NULL */
X509 *eecert = load_cert_from_file(ee_cert); /* may result in NULL */
X509 *untrcert = load_cert_from_file(ca_cert);
X509 *trcert = load_cert_from_file(sroot_cert);
if ((x = load_cert_from_file(bad_f)) == NULL)