如何使用Spring Security保护Vaadin流应用程序

Question

我正在尝试将vaadin 10与spring security(使用vaadin提供的spring项目库)集成,我对它们如何完全交互感到困惑.如果我转到受保护的URL(在此示例中,"/ about")直接在浏览器中键入,则会显示登录页面.如果我通过单击UI中的链接转到相同的URL,即使我未经过身份验证,该页面也会显示.所以我猜Vaadin没有通过Spring Security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呢？我应该两次实施安全措施吗？可用的文档似乎没有涵盖这一点,互联网上的每个链接都有Vaadin 7-8的例子,我从未使用过,并且似乎与10+不同.

有没有人知道关于这个的任何资源,或者你能告诉我所有这些如何一起工作所以我可以知道我在做什么？

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

}

Answer 1

使用 Vaadin Flow (12.0.2)、Spring Boot Starter (2.0.2.RELEASE) 和 Spring Boot Security，基本上，我发现使用以下方式基于角色/权限进行授权；

基于路由/上下文的角色/权限管理

• 弹簧安全（HttpSecurity）
• Vaadin API（BeforeEnterListener 和 Route/Navigation API）

业务单位角色/权限管理

• 在代码内部使用 HttpServletRequest.isUserInRole 方法

让我们从一个简单的 Spring Security 配置示例开始；

@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("$2a$10$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，我尚未在任何路由视图（用@Route 注释）上指定基于角色的任何权限。我要做的是，如果我有一个路由视图，我将在构建它（路由视图）时注册一个 BeforeEnterListener 并在那里检查所需的角色/权限。

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 Security 配置中已经被允许。

@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。

总结：如果你的视图有路由，首先使用 BeforeEnterListener 对请求进行授权，否则使用 Spring Security 匹配器（例如 regexMatchers 或 antMatchers）进行休息服务等。

注意：对同一规则同时使用 Vaadin Route 和 Spring Security 匹配器规则可能有点扭曲，我不建议这样做（它会导致 Vaadin 中的一些内部循环；例如，假设我们有一个使用 /view 和Spring Security 中的 /view 中具有必需角色的条目。如果用户缺少此类角色并且（她）被路由/导航到此类页面（使用 Vaadin 路由 API），Vaadin 会尝试打开与该路由关联的视图，而 Spring由于缺少角色，安全性避免了这种情况）。

另外，我认为，在将用户重新路由或导航到不同的视图/上下文之前，使用 Vaadin 流导航 API 的一个好做法是检查所需的角色/权限。

此外，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() {
    ///sf/answers/400921111/
    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
}

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

• https://github.com/igor-baiborodine/vaadin-demo-bakery-app/blob/master/src/main/java/com/kiroule/vaadin/bakeryapp/app/security/SecurityConfiguration.java
• https://github.com/igor-baiborodine/vaadin-demo-bakery-app/blob/master/src/main/java/com/kiroule/vaadin/bakeryapp/app/security/UserDetailsS​​erviceImpl.java
• https://www.baeldung.com/role-and-privilege-for-spring-security-registration