如何使用 Spring 安全性保护 Vaadin 流应用程序

How to secure Vaadin flow application with Spring Security

我正在尝试将 vaadin 10 与 spring 安全性集成(使用 vaadin 提供的 spring 项目库),但我对它们的确切交互方式感到困惑。如果我直接在浏览器中输入受保护的 url(在本例中为“/about”),就会显示登录页面。如果我通过单击 UI 中的 link 转到相同的 URL,即使我未通过身份验证,该页面也会显示。所以我猜 Vaadin 没有通过 Spring 安全的过滤器链,但是我如何在 UI 中保护我的资源,以及如何在 vaadin 和 spring 之间共享经过身份验证的用户?我应该实施两次安全措施吗?可用的文档似乎没有涵盖这一点,互联网上的每个 link 都有 Vaadin 7-8 的示例,我从未使用过它,而且似乎与 10+ 的工作方式不同。

有谁知道这方面的任何资源,或者您能告诉我所有这些是如何协同工作的,以便我知道我在做什么吗?

这是我的安全配置:

@Configuration
@EnableWebSecurity
public class SecurityConfig extends WebSecurityConfigurerAdapter {

    private static final String[] ALLOWED_GET_URLS = {
        "/",
        //"/about",
        "/login/**",
        "/frontend/**",
        "/VAADIN/**",
        "/favicon.ico"
    };

    private static final String[] ALLOWED_POST_URLS = {
        "/"
    };

    //@formatter:off
    @Override
    protected void configure(HttpSecurity http) throws Exception {
        http
            .csrf()
                .disable()
            .authorizeRequests()
                .mvcMatchers(HttpMethod.GET, ALLOWED_GET_URLS)
                    .permitAll()
                .mvcMatchers(HttpMethod.POST, ALLOWED_POST_URLS)
                    .permitAll()
                .anyRequest()
                    .fullyAuthenticated()
             .and()
                .formLogin()
                    .loginPage("/login")
                    .permitAll()
            .and()
                .logout()
                    .logoutSuccessUrl("/")
                    .permitAll();
    }
    //@formatter:on

}

使用 Vaadin Flow (12.0.2)、Spring Boot Starter (2.0.2.RELEASE) 和 Spring Boot Security,基本上,我发现授权基于 role/authority 使用以下方式;

Route/Context 基于 role/authority 管理

  • Spring 安全性 (HttpSecurity)
  • Vaadin API(BeforeEnterListener 和 Route/Navigation API)

事业部role/authority管理层

  • 代码内部使用HttpServletRequest.isUserInRole方法

让我们从一个简单的例子开始 Spring 安全配置;

@Configuration
@EnableWebSecurity
public class WebSecurityConfig
        extends WebSecurityConfigurerAdapter {

    @Override
    protected void configure(HttpSecurity http) throws Exception {
        http
                .csrf().disable() // CSRF is handled by Vaadin: https://vaadin.com/framework/security
                .exceptionHandling().accessDeniedPage("/accessDenied")
                .authenticationEntryPoint(new LoginUrlAuthenticationEntryPoint("/login"))
                .and().logout().logoutSuccessUrl("/")
                .and()
                .authorizeRequests()
                // allow Vaadin URLs and the login URL without authentication
                .regexMatchers("/frontend/.*", "/VAADIN/.*", "/login.*", "/accessDenied").permitAll()
                .regexMatchers(HttpMethod.POST, "/\?v-r=.*").permitAll()
                // deny any other URL until authenticated
                .antMatchers("/**").fullyAuthenticated()
            /*
             Note that anonymous authentication is enabled by default, therefore;
             SecurityContextHolder.getContext().getAuthentication().isAuthenticated() always will return true.
             Look at LoginView.beforeEnter method.
             more info: https://docs.spring.io/spring-security/site/docs/4.0.x/reference/html/anonymous.html
             */
        ;
    }

    @Autowired
    public void configureGlobal(AuthenticationManagerBuilder auth) throws Exception {
        auth
                .inMemoryAuthentication().passwordEncoder(new BCryptPasswordEncoder())
                .withUser("admin").password("a$obstjyWMAVfsNoKisfyCjO/DNfO9OoMOKNt5a6GRlVS7XNUzYuUbO").roles("ADMIN");// user and pass: admin 
    }

    /**
    * Expose the AuthenticationManager (to be used in LoginView)
    * @return
    * @throws Exception
    */
    @Bean(name = BeanIds.AUTHENTICATION_MANAGER)
    @Override
    public AuthenticationManager authenticationManagerBean() throws Exception {
        return super.authenticationManagerBean();
    }
}

如您所见,我还没有在我的任何路由视图(用@Route 注释)上指定任何基于角色的权限。我要做的是,如果我有一个路由视图,我将在构造它(路由视图)时注册一个 BeforeEnterListener,并在那里检查所需的 role/privilege。

以下是在导航到 admin-utils 视图之前检查用户是否具有 ADMIN 角色的示例;

@Route(value = "admin-utils")
public class AdminUtilsView extends VerticalLayout { 
@Autowired
private HttpServletRequest req;
...
    AdminUtilsView() {
        ...
        UI.getCurrent().addBeforeEnterListener(new BeforeEnterListener() {
            @Override
            public void beforeEnter(BeforeEnterEvent beforeEnterEvent) {
                if (beforeEnterEvent.getNavigationTarget() != DeniedAccessView.class && // This is to avoid a
                        // loop if DeniedAccessView is the target
                        !req.isUserInRole("ADMIN")) {
                    beforeEnterEvent.rerouteTo(DeniedAccessView.class);
                }
            }
        });
    }
}

如果用户没有 ADMIN 角色,他将被路由到 DeniedAccessView,这在 Spring 安全配置中已被允许。

@Route(value = "accessDenied")
public class DeniedAccessView
        extends VerticalLayout {
    DeniedAccessView() {
        FormLayout formLayout = new FormLayout();
        formLayout.add(new Label("Access denied!"));
        add(formLayout);
    }
}

在上面的示例 (AdminUtilsView) 中,您还可以通过自动装配 HttpServletRequest 在 Vaadin 代码中看到 HttpServletRequest.isUserInRole() 的用例。

SUMMARY: 如果你的视图有路由,先使用 BeforeEnterListener 来授权请求​​,否则使用 Spring 安全 用于休息服务等的匹配器(例如 regexMatchers 或 antMatchers)。

注意: 将 Vaadin 路由和 Spring 安全匹配器规则一起用于同一规则可能有点扭曲,我不建议(它在 Vaadin 中导致一些内部循环;例如假设我们有一个视图路由 /view 和 Spring Security for /view with a required role 中的一个条目。如果用户缺少这样的角色并且(s)他是 routed/navigated 到这样的页面(使用 Vaadin 路由 API),Vaadin 尝试打开与路由关联的视图,而 Spring 安全性由于缺少角色而避免了这种情况。

此外,我认为,在将用户重新路由或导航到不同的 view/context 之前,使用 Vaadin 流导航 API 的一个好习惯是检查所需的 role/authority。

此外,要有一个在 Vaadin 中使用 AuthenticationManager 的例子,我们可以有一个基于 Vaadin 的 LoginView 类似于;

@Route(value = "login")
public class LoginView
        extends FlexLayout implements BeforeEnterObserver {

    private final Label label;
    private final TextField userNameTextField;
    private final PasswordField passwordField;

    /**
    * AuthenticationManager is already exposed in WebSecurityConfig
    */
    @Autowired
    private AuthenticationManager authManager;

    @Autowired
    private HttpServletRequest req;

    LoginView() {
        label = new Label("Please login...");

        userNameTextField = new TextField();
        userNameTextField.setPlaceholder("Username");
        UiUtils.makeFirstInputTextAutoFocus(Collections.singletonList(userNameTextField));

        passwordField = new PasswordField();
        passwordField.setPlaceholder("Password");
        passwordField.addKeyDownListener(Key.ENTER, (ComponentEventListener<KeyDownEvent>) keyDownEvent -> authenticateAndNavigate());

        Button submitButton = new Button("Login");
        submitButton.addClickListener((ComponentEventListener<ClickEvent<Button>>) buttonClickEvent -> {
            authenticateAndNavigate();
        });

        FormLayout formLayout = new FormLayout();
        formLayout.add(label, userNameTextField, passwordField, submitButton);
        add(formLayout);

        // center the form
        setAlignItems(Alignment.CENTER);
        this.getElement().getStyle().set("height", "100%");
        this.getElement().getStyle().set("justify-content", "center");
    }

    private void authenticateAndNavigate() {
        /*
        Set an authenticated user in Spring Security and Spring MVC
        spring-security
        */
        UsernamePasswordAuthenticationToken authReq
                = new UsernamePasswordAuthenticationToken(userNameTextField.getValue(), passwordField.getValue());
        try {
            // Set authentication
            Authentication auth = authManager.authenticate(authReq);
            SecurityContext sc = SecurityContextHolder.getContext();
            sc.setAuthentication(auth);

            /*
            Navigate to the requested page:
            This is to redirect a user back to the originally requested URL – after they log in as we are not using
            Spring's AuthenticationSuccessHandler.
            */
            HttpSession session = req.getSession(false);
            DefaultSavedRequest savedRequest = (DefaultSavedRequest) session.getAttribute("SPRING_SECURITY_SAVED_REQUEST");
            String requestedURI = savedRequest != null ? savedRequest.getRequestURI() : Application.APP_URL;

            this.getUI().ifPresent(ui -> ui.navigate(StringUtils.removeStart(requestedURI, "/")));
        } catch (BadCredentialsException e) {
            label.setText("Invalid username or password. Please try again.");
        }
    }

    /**
    * This is to redirect user to the main URL context if (s)he has already logged in and tries to open /login
    *
    * @param beforeEnterEvent
    */
    @Override
    public void beforeEnter(BeforeEnterEvent beforeEnterEvent) {
        Authentication auth = SecurityContextHolder.getContext().getAuthentication();
        //Anonymous Authentication is enabled in our Spring Security conf
        if (auth != null && auth.isAuthenticated() && !(auth instanceof AnonymousAuthenticationToken)) {
            //https://vaadin.com/docs/flow/routing/tutorial-routing-lifecycle.html
            beforeEnterEvent.rerouteTo("");
        }
    }
}

最后,这是可以从菜单或按钮调用的注销方法:

/**
 * log out the current user using Spring security and Vaadin session management
 */
void requestLogout() {
    //
    SecurityContextHolder.clearContext();
    req.getSession(false).invalidate();

    // And this is similar to how logout is handled in Vaadin 8:
    // https://vaadin.com/docs/v8/framework/articles/HandlingLogout.html
    UI.getCurrent().getSession().close();
    UI.getCurrent().getPage().reload();// to redirect user to the login page
}

您可以继续使用 Spring UserDetailsS​​ervice 完成角色管理并通过查看以下示例创建 PasswordEncoder bean: