X509_OBJECT_get0_X509
pkey = X509_get_pubkey(X509_OBJECT_get0_X509(xobj));
id = OCSP_cert_to_id(NULL, x, X509_OBJECT_get0_X509(obj));
X509 *cert = X509_OBJECT_get0_X509(sk_X509_OBJECT_value(objs, i));
X509 *X509_OBJECT_get0_X509(const X509_OBJECT *a);