code: public KeyStore getCaCertKeystore() {
          try {
              KeyStore returnKeyStore = KeyStore.getInstance(KeyStore.getDefaultType());
              returnKeyStore.load(null, null);
              Enumeration<String> e = CACertService.caCertKeystore.aliases();
              while(e.hasMoreElements()) {
                  Certificate cert = CACertService.caCertKeystore.getCertificate(e.nextElement());
                  returnKeyStore.setCertificateEntry(((X509Certificate) cert).getSubjectDN().toString(), cert);
              }
              return CACertService.caCertKeystore;
          } catch (KeyStoreException e) {
              return null;
          } catch (CertificateException e) {
              return null;
          } catch (NoSuchAlgorithmException e) {
              return null;
          } catch (IOException e) {
              return null;
          }
      }
docs: Get a copy of the currently loaded CA Certificate KeyStore
  
  @return Copy of currently loaded CA Certificate KeyStore