code: protected PrivateKey getKey(KeyStore ks, String alias, char[] password) throws KeyStoreException, NoSuchAlgorithmException, UnrecoverableKeyException {
        return CertificateHelper.getKey(ks, alias, password);
     }
docs: returns a private key from the given keystore, uses configured {@link #KEYSTORE_PASSWORD keystorepassword}
  
  @param ks
  @param alias
  @return
  @throws KeyStoreException
  @throws NoSuchAlgorithmException
  @throws UnrecoverableKeyException