initialize_copy

static VALUE
ossl_x509ext_initialize_copy(VALUE self, VALUE other)
{
    X509_EXTENSION *ext, *ext_other, *ext_new;

    rb_check_frozen(self);
    GetX509Ext(self, ext);
    GetX509Ext(other, ext_other);

    ext_new = X509_EXTENSION_dup(ext_other);
    if (!ext_new)
        ossl_raise(eX509ExtError, "X509_EXTENSION_dup");

    SetX509Ext(self, ext_new);
    X509_EXTENSION_free(ext);

    return self;
}