/**
     *
     * {@inheritDoc}
     *
     * @see jcifs.smb.SmbPipeHandleInternal#getSessionKey()
     */
    @Override
    public byte[] getSessionKey() throws CIFSException {
        try (SmbTreeHandleImpl th = ensureTreeConnected(); SmbSessionImpl sess = th.getSession()) {
            return sess.getSessionKey();
        }
    }

    /**
     * {@inheritDoc}
     *

        assertTrue(session.isInUse());
    }

    @Test
    @DisplayName("getSessionKey: throws when absent, returns when present")
    void testGetSessionKey() throws Exception {
        SmbSessionImpl session = newSession();

        // Absent key -> CIFSException
        CIFSException noKey = assertThrows(CIFSException.class, session::getSessionKey);
        assertTrue(noKey.getMessage().contains("No session key"));

    }

    @Test
    @DisplayName("getSessionKey fetches via tree->session and returns bytes")
    void testGetSessionKey() throws CIFSException {
        when(pipe.ensureTreeConnected()).thenReturn(tree);
        when(tree.acquire()).thenReturn(tree);
        SmbSessionImpl session = mock(SmbSessionImpl.class);
        when(tree.getSession()).thenReturn(session);
        when(session.getSessionKey()).thenReturn(new byte[] { 1, 2, 3 });

            DcerpcPipeHandle handle = createMockedDcerpcPipeHandle();
            byte[] expectedKey = "sessionKey".getBytes();
            when(mockSmbPipeHandleInternal.getSessionKey()).thenReturn(expectedKey);
            assertArrayEquals(expectedKey, handle.getSessionKey());
        }

        @Test
        @DisplayName("Should propagate CIFSException when getting session key")

        return masterKey;
    }

    /**
     * Returns the session key.
     *
     * @return A <code>byte[]</code> containing the session key.
     */
    public byte[] getSessionKey() {
        return sessionKey;
    }

    /**
     * Sets the session key.
     *
     * @param sessionKey The session key.
     */
    public void setSessionKey(final byte[] sessionKey) {

        // After close, report stale
        handle.close();
        assertTrue(handle.isStale(), "Closed handle reports stale");
    }

    @Test
    @DisplayName("getSessionKey propagates CIFSException from session acquisition")
    void getSessionKey_exception_propagates() throws Exception {
        SmbPipeHandleImpl handle = newHandleWithBasicStubs(0, "\\\\pipe\\\\sess");

        ByteArrayOutputStream baos = new ByteArrayOutputStream();

        try {
            // Combine session key with channel-specific data
            byte[] sessionKey = getSessionKey();
            if (sessionKey != null) {
                baos.write(sessionKey);
            }
            baos.write(channel.getLocalInterface().getAddress().getAddress());

            return serverWithDfs;
        }

        @Override
        public CIFSContext getTransportContext() {
            return localTransportContext;
        }

        @Override
        public byte[] getSessionKey() throws CIFSException {
            return sessionKey;
        }

        @Override
        protected void doSendFragment(byte[] buf, int off, int length) throws IOException {

    }

    /**
     * Retrieve a session key
     *
     * @param sessionId unique session identifier
     * @return the secret key, or null if not found
     */
    public SecretKey getSessionKey(String sessionId) {
        checkNotClosed();

        SecretKey key = sessionKeys.get(sessionId);

        // Try to load from KeyStore if not in memory
        if (key == null && keyStore != null) {

     * @return session key of the underlying smb session
     * @throws CIFSException if unable to retrieve the session key
     */
    public abstract byte[] getSessionKey() throws CIFSException;

    @Override
    public String toString() {
        return this.binding.toString();
    }

    /**
     * Sends a DCERPC fragment to the remote endpoint