private boolean matchesDN(X500Principal subject, GeneralNames targets) {
    GeneralName[] names = targets.getNames();

    for (int i = 0; i != names.length; i++) {
      GeneralName gn = names[i];

      if (gn.getTagNo() == GeneralName.directoryName) {
        try {
          if (new X500Principal(((ASN1Encodable) gn.getName()).toASN1Primitive().getEncoded())
              .equals(subject)) {
            return true;
          }
        } catch (IOException e) {
        }
      }
    }

    return false;
  }