TS_REQ_get_policy_id
policy_id = TS_REQ_get_policy_id(a);
ASN1_OBJECT *requested = TS_REQ_get_policy_id(ctx->request);
if ((policy = TS_REQ_get_policy_id(req)) != NULL) {
ASN1_OBJECT *TS_REQ_get_policy_id(TS_REQ *a);