X509_get_version
l = X509_get_version(x);
if (X509_get_version(x) == X509_VERSION_1)
if (X509_get_version(x) != X509_VERSION_3) {
if (X509_get_version(x) != X509_VERSION_3) {
if (version == X509_get_version(x))
if (X509_get_version(x) >= X509_VERSION_3) {
long X509_get_version(const X509 *x);