code: public Object get(String name) throws IOException {
          if (name.equalsIgnoreCase(DN_NAME)) {
              return(dnName);
          } else if (name.equalsIgnoreCase(DN_PRINCIPAL)) {
              if ((dnPrincipal == null) && (dnName != null)) {
                  dnPrincipal = dnName.asX500Principal();
              }
              return dnPrincipal;
          } else {
              throw new IOException("Attribute name not recognized by " +
                                    "CertAttrSet:CertificateIssuerName.");
          }
      }
docs: Get the attribute value.