Spring中的Websocket身份验证与授权

Question

我一直在努力用Spring-Security正确地实现Stomp（websocket）身份验证和授权。对于后人，我将回答我自己的问题，以提供一个指导。

Spring WebSocket文档（用于身份验证）看起来不清楚ATM(IMHO)。我无法理解如何正确处理身份验证和授权。

null

• 在HTTP协商endpoint上进行身份验证（因为大多数JavaScript库不会随HTTP协商调用一起发送身份验证头）。

Answer 1

如上所述，文档(ATM)不清楚(IMHO)，在Spring提供一些清晰的文档之前，这里有一个样板，使您不必花两天的时间来理解安全链在做什么。

Rob-Leggett做了一个很好的尝试，但是，他分叉了一些Springs类，我觉得这样做很不舒服。

要知道的事情：

null

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-websocket</artifactId>
</dependency>
<dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-messaging</artifactId>
</dependency>
<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-security</artifactId>
</dependency>
<dependency>
    <groupId>org.springframework.security</groupId>
    <artifactId>spring-security-messaging</artifactId>
</dependency>

@Configuration
@EnableWebSocketMessageBroker
public class WebSocketConfig extends WebSocketMessageBrokerConfigurer {
    @Override
    public void configureMessageBroker(final MessageBrokerRegistry config) {
        // These are endpoints the client can subscribes to.
        config.enableSimpleBroker("/queue/topic");
        // Message received with one of those below destinationPrefixes will be automatically router to controllers @MessageMapping
        config.setApplicationDestinationPrefixes("/app");
    }

    @Override
    public void registerStompEndpoints(final StompEndpointRegistry registry) {
        // Handshake endpoint
        registry.addEndpoint("stomp"); // If you want to you can chain setAllowedOrigins("*")
    }
}

由于Stomp协议依赖于第一个HTTP请求，我们需要授权对Stomp握手endpoint的HTTP调用。

@Configuration
public class WebSecurityConfig extends WebSecurityConfigurerAdapter {
    @Override
    protected void configure(final HttpSecurity http) throws Exception {
        // This is not for websocket authorization, and this should most likely not be altered.
        http
                .httpBasic().disable()
                .sessionManagement().sessionCreationPolicy(SessionCreationPolicy.STATELESS).and()
                .authorizeRequests().antMatchers("/stomp").permitAll()
                .anyRequest().denyAll();
    }
}

@Component
public class WebSocketAuthenticatorService {
    // This method MUST return a UsernamePasswordAuthenticationToken instance, the spring security chain is testing it with 'instanceof' later on. So don't use a subclass of it or any other class
    public UsernamePasswordAuthenticationToken getAuthenticatedOrFail(final String  username, final String password) throws AuthenticationException {
        if (username == null || username.trim().isEmpty()) {
            throw new AuthenticationCredentialsNotFoundException("Username was null or empty.");
        }
        if (password == null || password.trim().isEmpty()) {
            throw new AuthenticationCredentialsNotFoundException("Password was null or empty.");
        }
        // Add your own logic for retrieving user in fetchUserFromDb()
        if (fetchUserFromDb(username, password) == null) {
            throw new BadCredentialsException("Bad credentials for user " + username);
        }

        // null credentials, we do not pass the password along
        return new UsernamePasswordAuthenticationToken(
                username,
                null,
                Collections.singleton((GrantedAuthority) () -> "USER") // MUST provide at least one role
        );
    }
}

注意:UsernamePasswordAuthenticationToken必须至少有一个GrantedAuthority，如果使用另一个构造函数，Spring将自动设置isAuthenticated=false。

@Component
public class AuthChannelInterceptorAdapter extends ChannelInterceptor {
    private static final String USERNAME_HEADER = "login";
    private static final String PASSWORD_HEADER = "passcode";
    private final WebSocketAuthenticatorService webSocketAuthenticatorService;

    @Inject
    public AuthChannelInterceptorAdapter(final WebSocketAuthenticatorService webSocketAuthenticatorService) {
        this.webSocketAuthenticatorService = webSocketAuthenticatorService;
    }

    @Override
    public Message<?> preSend(final Message<?> message, final MessageChannel channel) throws AuthenticationException {
        final StompHeaderAccessor accessor = MessageHeaderAccessor.getAccessor(message, StompHeaderAccessor.class);

        if (StompCommand.CONNECT == accessor.getCommand()) {
            final String username = accessor.getFirstNativeHeader(USERNAME_HEADER);
            final String password = accessor.getFirstNativeHeader(PASSWORD_HEADER);

            final UsernamePasswordAuthenticationToken user = webSocketAuthenticatorService.getAuthenticatedOrFail(username, password);

            accessor.setUser(user);
        }
        return message;
    }
}

请注意:presend()必须返回一个userNamePasswordAuthenticationToken，Spring Security链中的另一个元素对此进行测试。请注意：如果您的UsernamePasswordAuthenticationToken是在未传递GrantedAuthority的情况下构建的，则身份验证将失败，因为未传递GrantedAuthority的构造函数会自动设置Authenticated=false这是一个重要的细节，在Spring-Security中没有记录。

@Configuration
@Order(Ordered.HIGHEST_PRECEDENCE + 99)
public class WebSocketAuthenticationSecurityConfig extends  WebSocketMessageBrokerConfigurer {
    @Inject
    private AuthChannelInterceptorAdapter authChannelInterceptorAdapter;
    
    @Override
    public void registerStompEndpoints(final StompEndpointRegistry registry) {
        // Endpoints are already registered on WebSocketConfig, no need to add more.
    }

    @Override
    public void configureClientInboundChannel(final ChannelRegistration registration) {
        registration.setInterceptors(authChannelInterceptorAdapter);
    }

}

注意:@order是至关重要的别忘了，它允许我们的拦截器在安全链中首先注册。

@Configuration
public class WebSocketAuthorizationSecurityConfig extends AbstractSecurityWebSocketMessageBrokerConfigurer {
    @Override
    protected void configureInbound(final MessageSecurityMetadataSourceRegistry messages) {
        // You can customize your authorization mapping here.
        messages.anyMessage().authenticated();
    }

    // TODO: For test purpose (and simplicity) i disabled CSRF, but you should re-enable this and provide a CRSF endpoint.
    @Override
    protected boolean sameOriginDisabled() {
        return true;
    }
}