使用Spring Security从JWT令牌中提取当前登录的用户信息

Question

我使用Spring Security Oauth2实现了JWT和LDAP身份验证.它似乎工作正常,我可以使用我的LDAP凭据登录.

现在,有一个要求我需要使用当前登录的用户信息来保存数据库中的详细信息 - 特别是当该用户添加/更新新记录时.我尝试使用Spring安全方式来实现

SecurityContextHolder.getContext().getAuthentication().getDetails() 

但它不会返回我在JWT中获得的所有信息.它只返回远程IP,JWT令牌值和经过身份验证的true.它甚至没有返回name().

我是JWT的新手,所以不确定我是否需要通过阅读该令牌来提取它,甚至我们如何实现它.

任何指针将不胜感激.

谢谢.

Answer 1

您需要做的第一件事是在创建JWT时将用户信息存储在JWT内，然后在使用它时就必须提取它。我有一个类似的情况，我通过扩展双方解决它TokenEnhancer和JwtAccessTokenConverter。

我使用TokenEnhancer来将我的扩展类型的主体嵌入CustomUserDetailsJWT其他信息中。

public class CustomAccessTokenEnhancer implements TokenEnhancer {

    @Override
    public OAuth2AccessToken enhance(OAuth2AccessToken accessToken, OAuth2Authentication authentication) {
        Authentication userAuthentication = authentication.getUserAuthentication();
        if (userAuthentication != null) {
            Object principal = authentication.getUserAuthentication().getPrincipal();
            if (principal instanceof CustomUserDetails) {
                Map<String, Object> additionalInfo = new HashMap<>();
                additionalInfo.put("userDetails", principal);
                ((DefaultOAuth2AccessToken) accessToken).setAdditionalInformation(additionalInfo);
            }
        }
        return accessToken;
    }
}

然后Authentication在处理经过身份验证的请求时在构建对象时手动提取扩展的主体。

public class CustomJwtAccessTokenConverter extends JwtAccessTokenConverter {

    @Override
    public OAuth2Authentication extractAuthentication(Map<String, ?> map) {
        OAuth2Authentication authentication = super.extractAuthentication(map);
        Authentication userAuthentication = authentication.getUserAuthentication();

        if (userAuthentication != null) {
            LinkedHashMap userDetails = (LinkedHashMap) map.get("userDetails");
            if (userDetails != null) {

                // build your principal here
                String localUserTableField = (String) userDetails.get("localUserTableField");
                CustomUserDetails extendedPrincipal = new CustomUserDetails(localUserTableField);

                Collection<? extends GrantedAuthority> authorities = userAuthentication.getAuthorities();

                userAuthentication = new UsernamePasswordAuthenticationToken(extendedPrincipal,
                        userAuthentication.getCredentials(), authorities);
            }
        }
        return new OAuth2Authentication(authentication.getOAuth2Request(), userAuthentication);
    }
}

以及将AuthorizationServer其捆绑在一起的配置。

@Configuration
@EnableAuthorizationServer
public class AuthorizationServerConfig extends AuthorizationServerConfigurerAdapter {

    @Autowired
    private AuthenticationManager authenticationManager;

    @Autowired
    private UserDetailsService userDetailsService;

    @Autowired
    private DataSource dataSource;

    @Bean
    public JwtAccessTokenConverter accessTokenConverter() {
        CustomJwtAccessTokenConverter accessTokenConverter = new CustomJwtAccessTokenConverter();
        accessTokenConverter.setSigningKey("a1b2c3d4e5f6g");
        return accessTokenConverter;
    }

    @Bean
    public TokenStore tokenStore() {
        return new JwtTokenStore(accessTokenConverter());
    }

    @Bean
    @Primary
    public DefaultTokenServices tokenServices() {
        DefaultTokenServices defaultTokenServices = new DefaultTokenServices();
        defaultTokenServices.setTokenStore(tokenStore());
        defaultTokenServices.setSupportRefreshToken(true);
        return defaultTokenServices;
    }

    @Bean
    public TokenEnhancer tokenEnhancer() {
        return new CustomAccessTokenEnhancer();
    }

    @Bean
    public PasswordEncoder passwordEncoder() {
        return new BCryptPasswordEncoder();
    }

    @Override
    public void configure(ClientDetailsServiceConfigurer clients) throws Exception {
        clients.jdbc(dataSource).passwordEncoder(passwordEncoder());
    }

    @Override
    public void configure(AuthorizationServerEndpointsConfigurer endpoints) throws Exception {
        TokenEnhancerChain tokenEnhancerChain = new TokenEnhancerChain();
        tokenEnhancerChain.setTokenEnhancers(Arrays.asList(tokenEnhancer(), accessTokenConverter()));
        endpoints
                .tokenStore(tokenStore())
                .tokenEnhancer(tokenEnhancerChain)
                .authenticationManager(authenticationManager)
                .userDetailsService(userDetailsService);
    }

    @Override
    public void configure(AuthorizationServerSecurityConfigurer security) throws Exception {
        security.passwordEncoder(passwordEncoder());
        security.checkTokenAccess("isAuthenticated()");
    }
}

然后，我可以像这样访问我的资源控制器中的扩展主体

@RestController
public class SomeResourceController {

    @RequestMapping("/some-resource")
    public ResponseEntity<?> someResource(Authentication authentication) {
        CustomUserDetails userDetails = (CustomUserDetails) authentication.getPrincipal();
        return ResponseEntity.ok("woo hoo!");
    }

}

希望这可以帮助！