gistfile1.h

static VALUE
ossl_x509req_add_unstructuredName(VALUE self, VALUE name)
{
  X509_REQ *req;
  char* s;

  GetX509Req(self,req);
  s = StringValuePtr(name);
  if (X509_REQ_add1_attr_by_NID(req, NID_pkcs9_unstructuredName,MBSTRING_ASC,s, -1) != 1) {
    ossl_raise(eX509ReqError,NULL);
  }

  return name;

}