在 UsernamePasswordAuthenticationFilter 或 Controller 中创建 JWT 令牌？

Question

我尝试使用 Spring Security 生成 JWT 令牌，但我不知道如何正确执行（使用最佳实践）。

我是否应该在某处“拦截” UsernamePasswordAuthenticationFilter 中的身份验证方法并在其中生成令牌？ 或者最好使用控制器'/login'中自动装配的AuthenticationManager？

如果我使用控制器机制，我害怕对用户进行两次身份验证。

我用过这个教程：tutorial Jwt Token

这是我的代码：

@EnableWebSecurity
@EnableGlobalMethodSecurity(securedEnabled = true)
public class WebSecurityConfig extends WebSecurityConfigurerAdapter {

    @Autowired
    UserService userService;

    @Autowired
    private JwtAuthenticationEntryPoint jwtAuthenticationEntryPoint;

//  @Autowired
//  private UserDetailsService jwtUserDetailsService;

    @Autowired
    private JwtTokenFilter jwtTokenFilter;

    @Override
    protected void configure(HttpSecurity http) throws Exception {
        http
            .httpBasic()
                .and()
            .exceptionHandling().authenticationEntryPoint(jwtAuthenticationEntryPoint)
                .and()
            .sessionManagement()
            .sessionCreationPolicy(SessionCreationPolicy.STATELESS)
                .and()
            .cors().and()
            .csrf().disable()
            .authorizeRequests()
                .antMatchers("/css/**", "/login/**", "/register/**").permitAll()
                .antMatchers("/admin/**").hasRole("ADMIN")      
                .anyRequest().authenticated()
                .and()
            //.csrfTokenRepository(CookieCsrfTokenRepository.withHttpOnlyFalse());
            .formLogin()
                .usernameParameter("email")
                //.loginPage("http://localhost:4200/login").failureUrl("/login-error")  
                .and()
            .logout() 
                .permitAll();
        http
            .addFilterBefore(jwtTokenFilter, UsernamePasswordAuthenticationFilter.class);
    }

    @Autowired
    public void configure(AuthenticationManagerBuilder auth) throws Exception {
        auth.authenticationProvider(authenticationProvider());
    }

    @Bean
    public CustomDaoAuthenticationProvider authenticationProvider() {
        CustomDaoAuthenticationProvider authenticationProvider = new CustomDaoAuthenticationProvider();
        authenticationProvider.setPasswordEncoder(new BCryptPasswordEncoder());
        authenticationProvider.setUserDetailsService(userService);
        return authenticationProvider;
    }

    @Bean
    public WebMvcConfigurer corsConfigurer() {
        return new WebConfig() {
            @Override
            public void addCorsMappings(CorsRegistry registry) {
                registry.addMapping("/**")
                .allowedOrigins(
                        "http://localhost:4200")
                .allowedMethods("GET", "POST", "PUT", "DELETE", "HEAD", "OPTIONS")
                .allowedHeaders("Content-Type", "X-Requested-With", "accept", "Origin", "Access-Control-Request-Method",
                                "Access-Control-Request-Headers", "Authorization", "Cache-Control",
                                "Access-Control-Allow-Origin")
                .exposedHeaders("Access-Control-Allow-Origin", "Access-Control-Allow-Credentials")
                .allowCredentials(true).maxAge(3600);
            }
        };
    }
}

令牌过滤器

public class JwtTokenFilter extends GenericFilterBean {

    private JwtTokenProvider jwtTokenProvider;

    public JwtTokenFilter(JwtTokenProvider jwtTokenProvider) {
        this.jwtTokenProvider = jwtTokenProvider;
    }

    @Override
    public void doFilter(ServletRequest req, ServletResponse res, FilterChain filterChain) throws IOException, ServletException {
        String token = jwtTokenProvider.resolveToken((HttpServletRequest) req);
        if (token != null && jwtTokenProvider.validateToken(token)) {
            Authentication auth = token != null ? jwtTokenProvider.getAuthentication(token) : null;
            SecurityContextHolder.getContext().setAuthentication(auth);
        }
        filterChain.doFilter(req, res);
    }
}

令牌提供者

@Component
public class JwtTokenProvider {

    @Value("${security.jwt.token.secret-key:secret}")
    private String secretKey = "secret";

    @Value("${security.jwt.token.expire-length:3600000}")
    private long validityInMilliseconds = 3600000; // 1h    

    @Autowired
    private UserDetailsService userDetailsService;

    @PostConstruct
    protected void init() {
        secretKey = Base64.getEncoder().encodeToString(secretKey.getBytes());
    }

    public String createToken(String username, List<String> roles) {

        Claims claims = Jwts.claims().setSubject(username);
        claims.put("roles", roles);
        Date now = new Date();
        Date validity = new Date(now.getTime() + validityInMilliseconds);
        return Jwts.builder()//
                    .setClaims(claims)//
                    .setIssuedAt(now)//
                    .setExpiration(validity)//
                    .signWith(SignatureAlgorithm.HS256, secretKey)//
                    .compact();
    }

    public Authentication getAuthentication(String token) {
        UserDetails userDetails = this.userDetailsService.loadUserByUsername(getUsername(token));
        return new UsernamePasswordAuthenticationToken(userDetails, "", userDetails.getAuthorities());
    }

    public String getUsername(String token) {
        return Jwts.parser().setSigningKey(secretKey).parseClaimsJws(token).getBody().getSubject();
    }

    public String resolveToken(HttpServletRequest req) {
        String bearerToken = req.getHeader("Authorization");
        if (bearerToken != null && bearerToken.startsWith("Bearer ")) {
            return bearerToken.substring(7, bearerToken.length());
        }
        return null;
    }

    public boolean validateToken(String token) {
        try {
            Jws<Claims> claims = Jwts.parser().setSigningKey(secretKey).parseClaimsJws(token);
            if (claims.getBody().getExpiration().before(new Date())) {
                return false;
            }
            return true;
        } catch (JwtException | IllegalArgumentException e) {
            throw new InvalidJwtAuthenticationException("Expired or invalid JWT token");
        }
    }
}

Answer 1

根据您的上下文，控制器负责发布新令牌（在验证凭据之后），而过滤器负责根据给定令牌对用户进行身份验证。控制器不应填充安全上下文（验证用户），这是过滤器的责任。

为了更好地理解这两个阶段：

Spring 使用两个过滤器来验证和登录用户。 请参阅 Spring Security 项目中“用户名/密码”场景中的 UsernamePasswordAuthenticationFilter 和 SecurityContextPersistenceFilter：第一个处理身份验证尝试（用户名/密码），而后者从 SecurityContextRepository 填充安全上下文（来自一般会话）。