将Spring Security全局方法安全性与Keycloak集成

Question

我在使用Spring Security的Pre / Post Authorization Annotations和使用Keycloak集成的Servlet API时遇到了问题。我没有进一步的运气调查了很多文章，教程和以下问题：

• Obtaining user roles in servlet application using keycloak
• Spring Boot Keycloak - How to get a list of roles assigned to a user?
• Using spring security annotations with keycloak
• Spring Boot + Spring Security + Hierarchical Roles
• How do I add method based security to a Spring Boot project?
• Configure DefaultMethodSecurityExpressionHandler using Spring Security Java Config
• SpringBoot + method based hierarchical roles security: ServletContext is required

我想要的只是删除ROLES_前缀，使用分层角色和一种舒适的方式来检索用户的角色。

截至目前，我能够在Controller中检索这样的分层角色，但不能使用注释：

@Controller
class HomeController {

    @Autowired
    AccessToken token

    @GetMapping('/')
    def home(Authentication auth, HttpServletRequest request) {
        // Role 'admin' is defined in Keycloak for this application
        assert token.getResourceAccess('my-app').roles == ['admin']
        // All effective roles are mapped
        assert auth.authorities.collect { it.authority }.containsAll(['admin', 'author', 'user'])

        // (!) But this won't work:
        assert request.isUserInRole('admin')
    }

    // (!) Leads to a 403: Forbidden
    @GetMapping('/sec')
    @PreAuthorize("hasRole('admin')") {
        return "Hello World"
    }

}

我猜测@PreAuthorize注释不起作用，因为Servlet方法不成功。

Keycloak和Spring中只定义了三个角色 - 管理员，作者，用户：

enum Role {
    USER('user'),
    AUTHOR('author'),
    ADMIN('admin')

    final String id

    Role(String id) {
        this.id = id
    }

    @Override
    String toString() {
        id
    }
}

Keycloak配置

从这个网络安全删除@EnableGlobalMethodSecurity注释显示由Error creating bean with name 'resourceHandlerMapping'错误引起的No ServletContext set - 没有线索，来自哪里！

@Configuration
@EnableWebSecurity
@EnableGlobalMethodSecurity(prePostEnabled = true)
class SecurityConfig extends KeycloakWebSecurityConfigurerAdapter {

    /**
     * Registers the KeycloakAuthenticationProvider with the authentication manager.
     */
    @Autowired
    void configureGlobal(AuthenticationManagerBuilder auth) {
        auth.authenticationProvider(keycloakAuthenticationProvider().tap { provider ->
            // Assigns the Roles via Keycloaks role mapping
            provider.grantedAuthoritiesMapper = userAuthoritiesMapper
        })
    }

    @Bean
    RoleHierarchyImpl getRoleHierarchy() {
        new RoleHierarchyImpl().tap {
            hierarchy = "$Role.ADMIN > $Role.AUTHOR > $Role.USER"
        }
    }

    @Bean
    GrantedAuthoritiesMapper getUserAuthoritiesMapper() {
        new RoleHierarchyAuthoritiesMapper(roleHierarchy)
    }

    SecurityExpressionHandler<FilterInvocation> expressionHandler() {
        // Removes the prefix
        new DefaultWebSecurityExpressionHandler().tap {
            roleHierarchy = roleHierarchy
            defaultRolePrefix = null
        }
    }

    // ...

    @Bean
    @Scope(scopeName = WebApplicationContext.SCOPE_REQUEST, proxyMode = ScopedProxyMode.TARGET_CLASS)
    AccessToken accessToken() {
        def request = ((ServletRequestAttributes) RequestContextHolder.currentRequestAttributes()).getRequest()
        def authToken = (KeycloakAuthenticationToken) request.userPrincipal
        def securityContext = (KeycloakSecurityContext) authToken.credentials

        return securityContext.token
    }

    @Override
    protected void configure(HttpSecurity http) throws Exception {
        super.configure(http)
        http
            .authorizeRequests()
            .expressionHandler(expressionHandler())
            // ...
    }

}

全局方法安全配置

我需要明确允许allow-bean-definition-overriding，因为否则我得到了bean with that name already defined错误，这表明我完全失去了对整个情况的控制，并且不知道发生了什么。

@Configuration
@EnableGlobalMethodSecurity(prePostEnabled = true)
class GlobalMethodSecurityConfig extends GlobalMethodSecurityConfiguration {

    @Autowired
    RoleHierarchy roleHierarchy

    @Override
    protected MethodSecurityExpressionHandler createExpressionHandler() {
        ((DefaultMethodSecurityExpressionHandler)super.createExpressionHandler()).tap {
            roleHierarchy = roleHierarchy
            defaultRolePrefix = null
        }
    }
}

任何进一步的配置可能很重要？非常感谢你的帮助！

Answer 1

正如M. Deinum指出的那样，必须用defaultRolePrefix在多个地方移除BeanPostProcessor，(docs.spring.io) Disable ROLE_ Prefixing对此进行了解释。

这种方法对我来说似乎不太干净，因此我编写了一个自定义AuthoritiesMapper来实现Keycloak中的映射层次角色，而无需将它们重命名为ROLE_ Spring标准。首先，修改了Roles枚举以符合应用范围内的标准：

enum Role {
    USER('ROLE_USER'),
    AUTHOR('ROLE_AUTHOR'),
    ADMIN('ROLE_ADMIN')

    // ...
}

其次，我用前缀层次化实现替换了RoleHierarchyAuthoritiesMapper：

@Configuration
@EnableWebSecurity
@EnableGlobalMethodSecurity(prePostEnabled = true)
class SecurityConfig extends KeycloakWebSecurityConfigurerAdapter {

    // ..

    // Replaces the RoleHierarchyAuthoritiesMapper
    @Bean
    GrantedAuthoritiesMapper getUserAuthoritiesMapper() {
        new PrefixingRoleHierarchyAuthoritiesMapper(roleHierarchy)
    }

}

class PrefixingRoleHierarchyAuthoritiesMapper extends RoleHierarchyAuthoritiesMapper {

        String prefix = 'ROLE_'

        PrefixingRoleHierarchyAuthoritiesMapper(RoleHierarchy roleHierarchy) {
            super(roleHierarchy)
        }

        @Override
        Collection<? extends GrantedAuthority> mapAuthorities(Collection<? extends GrantedAuthority> authorities) {
            def prefixedAuthorities = authorities.collect { GrantedAuthority originalAuthority ->
                new GrantedAuthority() {
                    String authority = "${prefix}${originalAuthority.authority}".toUpperCase()
                }
            }

            super.mapAuthorities(prefixedAuthorities)
        }
    }

最后，我摆脱了GlobalMethodSecurityConfig。