if (is_server)
{
sk_X509_pop_free(server_static_cbinfo->verify_stack, X509_free);
server_static_cbinfo->verify_stack = NULL;
}
if (is_server)
{
sk_X509_pop_free(server_static_cbinfo->verify_stack, X509_free);
server_static_cbinfo->verify_stack = NULL;
}