private void createSSLContext(Certificate certificate, XMPPTCPConnectionConfiguration.Builder builder) throws KeyStoreException,
        NoSuchAlgorithmException, KeyManagementException, UnrecoverableKeyException, CertificateException, IOException {
    KeyStore trustStore = KeyStore.getInstance(KeyStore.getDefaultType());
    trustStore.load(null, null);
    trustStore.setCertificateEntry("ca", certificate);
    TrustManagerFactory tmf = TrustManagerFactory.getInstance(TrustManagerFactory.getDefaultAlgorithm());
    tmf.init(trustStore);

    SSLContext sslContext = SSLContext.getInstance(TLSUtils.TLS);
    sslContext.init(null, tmf.getTrustManagers(), null);
    builder.setCustomSSLContext(sslContext);
    builder.setSocketFactory(sslContext.getSocketFactory());
}