// When/Then
        assertThrows(IllegalArgumentException.class, () -> {
            transformHeader.setNonce(shortNonce);
        });

        assertThrows(IllegalArgumentException.class, () -> {
            transformHeader.setNonce(longNonce);
        });
    }

    @Test
    @DisplayName("Should handle null signature")
    void testNullSignature() {
        // When/Then

     *
     * @return the nonce
     */
    public byte[] getNonce() {
        return this.nonce;
    }

    /**
     * Sets the nonce for encryption
     *
     * @param nonce
     *            the nonce to set (12 bytes for CCM, 16 bytes for GCM)
     */
    public void setNonce(final byte[] nonce) {
        if (nonce.length == 12) {

            final Smb2TransformHeader transformHeader = Smb2TransformHeader.decode(encryptedMessage, 0);
            final byte[] associatedData = transformHeader.getAssociatedData();
            byte[] nonce = transformHeader.getNonce();
            final byte[] authTag = transformHeader.getSignature();

            // Extract ciphertext
            final int ciphertextLength = encryptedMessage.length - Smb2TransformHeader.TRANSFORM_HEADER_SIZE;

            if (logger.isDebugEnabled()) {
                logger.debug("nonce={}", nonce);
            }
            if (StringUtils.isEmpty(nonce) || !nonce.equals(stateData.getNonce())) {
                throw new SsoLoginException("could not validate nonce");
            }
        } catch (final SsoLoginException e) {
            throw e;
        } catch (final Exception e) {

    public void close() {
        if (runner != null) {
            try {
                client.admin()
                        .indices()
                        .prepareFlush()
                        .setForce(true)
                        .execute()
                        .actionGet(ComponentUtil.getFessConfig().getIndexIndicesTimeout());
            } catch (final Exception e) {