* Authenticates a user with the specified username and password against LDAP.
     *
     * @param username the username for authentication
     * @param password the password for authentication
     * @return an optional containing the authenticated user if successful, empty otherwise
     */
    public OptionalEntity<FessUser> login(final String username, final String password) {
        // Add defensive null/blank checks

                    }
                    user = auth.getUserName();
                    password = new String(auth.getPassword());
                } catch (final Exception ex) {}
            }
            final Type2Message type2 = (Type2Message) message;
            message = new Type3Message(type2, password, domain, user, Type3Message.getDefaultWorkstation(), 0);
        }
        return message;
    }

errors.invalid_kuromoji_segmentation=The number of segmentation for {0} and {1} is different.
errors.invalid_str_is_included = {1} is invalid for {0}.
errors.blank_password = Password is required.
errors.invalid_confirm_password = Does not match a confirmation password.
errors.cannot_delete_doc_because_of_running = A crawler is running. You cannot delete documents.
errors.failed_to_delete_doc_in_admin = Failed to delete a document.

errors.invalid_kuromoji_segmentation=The number of segmentation for {0} and {1} is different.
errors.invalid_str_is_included = {1} is invalid for {0}.
errors.blank_password = Password is required.
errors.invalid_confirm_password = Does not match a confirmation password.
errors.cannot_delete_doc_because_of_running = A crawler is running. You cannot delete documents.
errors.failed_to_delete_doc_in_admin = Failed to delete a document.

    public static final String RESOURCE_NAME_KEY = "resourceName";

    /** URL key for metadata */
    public static final String URL = "url";

    /** File passwords key for metadata */
    public static final String FILE_PASSWORDS = "file.passwords";

    /** Map containing metadata key-value pairs */
    protected Map<String, String[]> metadata = new HashMap<>();

    /** The extracted content text */

        final String username = fessConfig.getFesenUsername();
        final String password = fessConfig.getFesenPassword();
        if (StringUtil.isNotBlank(username) && StringUtil.isNotBlank(password)) {
            final String value = username + ":" + password;
            final String basicAuth = "Basic " + java.util.Base64.getEncoder().encodeToString(value.getBytes(StandardCharsets.UTF_8));

            throw new CrawlerSystemException("PDF input stream is null. Cannot extract text from null input.");
        }

        final String password = getPassword(params);
        try (PDDocument document = Loader.loadPDF(new RandomAccessReadBuffer(in), password)) {
            final StringWriter writer = new StringWriter();
            final PDFTextStripper stripper = new PDFTextStripper();

            if (!lowerData.contains("password") && !lowerData.contains("secret") && !lowerData.contains("token")
                    && !lowerData.contains("key") && !lowerData.contains("credential") && !lowerData.contains("auth")) {
                return data; // No sensitive patterns detected, skip regex
            }
        }

        // Mask passwords and secrets using cached pattern

class NtlmContextTest {

    @Mock
    private NtlmPasswordAuthentication mockAuth;

    private final String domain = "TEST_DOMAIN";
    private final String username = "testUser";
    private final String password = "testPassword";
    private final String workstation = "TEST_WORKSTATION";

    @BeforeEach
    void setUp() {
        // MockitoExtension handles mock initialization

{"index":{"_index":"fess_user.user","_id":"YWRtaW4="}}