&& cipherId != CIPHER_AES_256_GCM) {
            log.error("Invalid cipher ID: {}", cipherId);
            return false;
        }

        // Validate keys are available
        if (keyManager == null && (encryptionKey == null || decryptionKey == null)) {
            log.error("No encryption keys available");
            return false;
        }

        // Validate key lengths

**Describe the bug**
A clear and concise description of what the bug is.

**To Reproduce**
Steps to reproduce the behavior:
1. Go to '...'
2. Click on '....'
3. Scroll down to '....'
4. See error

**Expected behavior**
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**Screenshots**
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        assertArrayEquals(new byte[0], session.getSessionKey());
        assertNull(session.getSessionKey());
        verify(session, times(3)).getSessionKey();
    }

    // Error propagation: getSessionKey throws CIFSException
    @Test
    @DisplayName("getSessionKey throws CIFSException on failure")
    void getSessionKey_throws() throws CIFSException {

    
    ChannelInfo channel = createTestChannel("test-channel", 1000);
    manager.addChannel(channel);
    
    // Simulate failure
    IOException error = new IOException("Network error");
    failover.handleFailure(channel, error);
    
    // Verify channel marked as failed
    assertEquals(ChannelState.FAILED, channel.getState());
    
    // Verify recovery attempted
    Thread.sleep(2000);

import org.codelibs.core.lang.StringUtil;
import org.codelibs.core.net.URLUtil;
import org.codelibs.fess.Constants;
import org.codelibs.fess.app.web.base.FessSearchAction;
import org.codelibs.fess.app.web.error.ErrorAction;
import org.codelibs.fess.crawler.util.CharUtil;
import org.codelibs.fess.helper.PathMappingHelper;
import org.codelibs.fess.helper.SearchLogHelper;
import org.codelibs.fess.helper.ViewHelper;

        running.set(false);

        if (serverSocket != null && !serverSocket.isClosed()) {
            try {
                serverSocket.close();
            } catch (IOException e) {
                log.debug("Error closing server socket", e);
            }
        }

        if (serverThread != null) {
            try {
                serverThread.join(5000); // Wait up to 5 seconds
            } catch (InterruptedException e) {

            case CRITICAL:
            case ERROR:
                auditLog.error(jsonStr);
                break;
            case WARNING:
                auditLog.warn(jsonStr);
                break;
            default:
                auditLog.info(jsonStr);
            }
        } catch (Exception e) {
            log.error("Failed to serialize audit entry to JSON", e);

     *
     * @param field the field (must not be {@literal null})
     * @return the field value
     * @throws IllegalAccessRuntimeException {@link IllegalAccessException} if an error occurs
     * @see #getInt(Field, Object)
     */
    public static int getInt(final Field field) throws IllegalAccessRuntimeException {
        assertArgumentNotNull("field", field);

        return getInt(field, null);

     * HttpServletResponse.SC_UNAUTHORIZED).
     * @return True if the negotiation is complete, otherwise false
     * @throws IOException if an I/O error occurs
     * @throws ServletException if a servlet error occurs
     */
    protected NtlmPasswordAuthentication negotiate(final HttpServletRequest req, final HttpServletResponse resp,

     * @param encType Encryption type
     * @param encryptedData Encrypted data
     * @param unknownTag Optional unknown tag number to test error handling
     * @return A byte array representing the ticket
     * @throws IOException on encoding error
     */
    private byte[] createTestTicketBytes(Number version, String realm, String principalName, int encType, byte[] encryptedData,