}
    }

    @Override
    public boolean changePassword(final String username, final String password) {
        if (isTargetUser(username) && StringUtil.isNotBlank(password)) {
            return executeCommand(updateCommand, username, password) == 0;
        }
        return true;
    }

    @Override
    public User load(final User user) {
        return user;
    }

    /**

    }

    /**
     * Validates a password against configured password policy requirements.
     *
     * @param password The password to validate.
     * @return An empty string if the password is valid, or an error key for the validation failure.
     */
    public String validatePassword(final String password) {
        if (StringUtil.isBlank(password)) {
            return "errors.blank_password";
        }

            if (form.crudMode.intValue() == CrudMode.CREATE || StringUtil.isNotBlank(form.password)) {
                final String encodedPassword = ComponentUtil.getComponent(FessLoginAssist.class).encryptPassword(form.password);
                entity.setOriginalPassword(form.password);
                entity.setPassword(encodedPassword);
            }

        assertTrue("Result should contain password={cipher}, but was: " + result, result.contains("password={cipher}"));

        // Test with empty encryption target
        value = "password=";
        result = ParameterUtil.encrypt(value);
        assertTrue(result.contains("password={cipher}"));

        // Test with only whitespace value
        value = "password=   ";
        result = ParameterUtil.encrypt(value);

        // Credentials
        final CredentialsConfig credentials = new CredentialsConfig();
        credentials.setUsername(username);
        final String password = paramMap.get(prefix + "password");
        credentials.setPassword(password == null ? StringUtil.EMPTY : password);
        if (Constants.NTLM.equals(scheme)) {
            credentials.setType(CredentialsType.NTLM);
            credentials.setDomain(paramMap.get(prefix + "domain"));

    }

    // Helper methods

    private void setupMockConfig(String fesenUrl, String username, String password) {
        setupMockConfig(fesenUrl, username, password, "");
    }

    private void setupMockConfig(String fesenUrl, String username, String password, String certificateAuthorities) {
        ComponentUtil.setFessConfig(new FessConfig.SimpleImpl() {

errors.blank_password = Password is required.
errors.password_length = Password must be at least {0} characters long.
errors.password_no_uppercase = Password must contain at least one uppercase letter.
errors.password_no_lowercase = Password must contain at least one lowercase letter.
errors.password_no_digit = Password must contain at least one digit.
errors.password_no_special_char = Password must contain at least one special character.

errors.blank_password = Password is required.
errors.password_length = Password must be at least {0} characters long.
errors.password_no_uppercase = Password must contain at least one uppercase letter.
errors.password_no_lowercase = Password must contain at least one lowercase letter.
errors.password_no_digit = Password must contain at least one digit.
errors.password_no_special_char = Password must contain at least one special character.

        this.pager = value;
    }

    public String getPassword() {
        checkSpecifiedProperty("password");
        return convertEmptyToNull(password);
    }

    public void setPassword(String value) {
        registerModifiedProperty("password");
        this.password = value;
    }

    public String getPhysicalDeliveryOfficeName() {

        boolean result = chain.changePassword(null, "password");

        assertFalse(result);
        assertEquals(1, chain.changePasswordCalls.size());
        assertNull(chain.changePasswordCalls.get(0).getKey());
        assertEquals("password", chain.changePasswordCalls.get(0).getValue());
    }

    // Test changePassword with null password
    @Test
    public void test_changePassword_nullPassword() {