final String ALIAS="ALIAS";

            final String inboundString ="1" ;

            byte[] result= null;

        try {

            KeyStore keyStore = KeyStore.getInstance(JCP.HD_STORE_NAME);

            keyStore.load(null, null);

            PrivateKey privateKey = (PrivateKey)keyStore.getKey(ALIAS, null);

            Signature sig = Signature.getInstance("GOST3411withGOST3410EL", "JCP");

            sig.initSign(privateKey);

            byte[] data;

            data = inboundString.getBytes();

            sig.update(data);

            result  =   sig.sign();

        } catch (KeyStoreException | IOException |

                NoSuchAlgorithmException | CertificateException |

                UnrecoverableKeyException | NoSuchProviderException |

                InvalidKeyException | SignatureException ex) {

            Logger.getLogger(CryptoServlet.class.getName()).log(Level.SEVERE, "Error found", ex);

        }