java - 访问资源服务器 Controller 内的 Spring OAuth 2 JWT 负载？

Question

我正在浏览 this tutorial关于如何使用 jwt 设置 spring boot oauth。它涵盖了使用 Angular 解码 JWT token ，但我们如何解码它并访问资源服务器 Controller 内的自定义声明？

例如，对于 JJWT，它可以像这样完成(Based on this article):

    String subject = "HACKER";
    try {
        Jws jwtClaims = 
            Jwts.parser().setSigningKey(key).parseClaimsJws(jwt);

        subject = claims.getBody().getSubject();

        //OK, we can trust this JWT

    } catch (SignatureException e) {

        //don't trust the JWT!
    }

Spring 有一个 JWTAccessTokenConverter.decode()方法，但缺少 javadoc，它是 protected 。

Answer 1

这是我在 Spring Boot 中访问自定义 JWT 声明的方式:

1)让Spring将JWT内容复制到Authentication中:

@Configuration
@EnableResourceServer
@EnableGlobalMethodSecurity(prePostEnabled = true)
public class SecurityConfig extends ResourceServerConfigurerAdapter{

    @Override
    public void configure(ResourceServerSecurityConfigurer config) {
        config.tokenServices( createTokenServices() );
    }

    @Bean
    public DefaultTokenServices createTokenServices() {
        DefaultTokenServices defaultTokenServices = new DefaultTokenServices();
        defaultTokenServices.setTokenStore( createTokenStore() );
        return defaultTokenServices;
    }

    @Bean
    public TokenStore createTokenStore() {               
        return new JwtTokenStore( createJwtAccessTokenConverter() );
    }

    @Bean
    public JwtAccessTokenConverter createJwtAccessTokenConverter() {
        JwtAccessTokenConverter converter = new JwtAccessTokenConverter();     
        converter.setAccessTokenConverter( new JwtConverter() );
        return converter;
    }

    public static class JwtConverter extends DefaultAccessTokenConverter implements JwtAccessTokenConverterConfigurer {

        @Override
        public void configure(JwtAccessTokenConverter converter) {
            converter.setAccessTokenConverter(this);
        }

        @Override
        public OAuth2Authentication extractAuthentication(Map<String, ?> map) {
            OAuth2Authentication auth = super.extractAuthentication(map);
            auth.setDetails(map); //this will get spring to copy JWT content into Authentication
            return auth;
        }
    }
}

2) 在您的代码中的任何位置访问 token 内容:

Authentication authentication = SecurityContextHolder.getContext().getAuthentication();        
Object details = authentication.getDetails();        
if ( details instanceof OAuth2AuthenticationDetails ){
    OAuth2AuthenticationDetails oAuth2AuthenticationDetails = (OAuth2AuthenticationDetails)details;

    Map<String, Object> decodedDetails = (Map<String, Object>)oAuth2AuthenticationDetails.getDecodedDetails();

    System.out.println( "My custom claim value: " + decodedDetails.get("MyClaim") );
}