trustManagerFactory.init(keyStore);

                final SSLContext sslContext = SSLContext.getInstance("TLS");
                sslContext.init(null, trustManagerFactory.getTrustManagers(), null);
                sslSocketFactory = sslContext.getSocketFactory();
            } catch (final Exception e) {
                logger.warn("Failed to load certificate_authorities: path={}", authorities, e);

        TrustManagerFactory.getDefaultAlgorithm());
    trustManagerFactory.init((KeyStore) null);
    TrustManager[] trustManagers = trustManagerFactory.getTrustManagers();
    if (trustManagers.length != 1 || !(trustManagers[0] instanceof X509TrustManager)) {
      throw new IllegalStateException("Unexpected default trust managers:"
          + Arrays.toString(trustManagers));
    }

    trustManagerFactory.init(keystore);

    SSLContext sslContext = SSLContext.getInstance("TLS");
    sslContext.init(
        keyManagerFactory.getKeyManagers(),
        trustManagerFactory.getTrustManagers(),
        new SecureRandom());

    return sslContext;
  }