单点登录概念

单点登录（Single Sign On），简称为 SSO，是目前比较流行的企业业务整合的解决方案之一。SSO的定义是在多个应用系统中，用户只需要登录一次就可以访问所有相互信任的应用系统。登录逻辑如上图

基于Spring 全家桶的实现

技术选型：

Spring Boot
Spring Cloud 
Spring Security oAuth2

客户端：

maven依赖

<dependency>
   <groupId>org.springframework.boot</groupId>
   <artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-security</artifactId>
</dependency>
<dependency>
    <groupId>org.springframework.security.oauth</groupId>
    <artifactId>spring-security-oauth2</artifactId>
</dependency>
<dependency>
    <groupId>org.springframework.security</groupId>
    <artifactId>spring-security-jwt</artifactId>
</dependency>

EnableOAuth2Sso 注解

入口类配置@@EnableOAuth2Sso

@SpringBootApplication
public class PigSsoClientDemoApplication {

    public static void main(String[] args) {
        SpringApplication.run(PigSsoClientDemoApplication.class, args);
    }

}

配置文件

security:
  oauth2:
    client:
      client-id: pig
      client-secret: pig
      user-authorization-uri: http://localhost:3000/oauth/authorize
      access-token-uri: http://localhost:3000/oauth/token
      scope: server
    resource:
      jwt:
        key-uri: http://localhost:3000/oauth/token_key
  sessions: never

SSO认证服务器

认证服务器配置

@Configuration
@Order(Integer.MIN_VALUE)
@EnableAuthorizationServer
public class PigAuthorizationConfig extends AuthorizationServerConfigurerAdapter {

    @Override
    public void configure(ClientDetailsServiceConfigurer clients) throws Exception {
        clients.inMemory()
                .withClient(authServerConfig.getClientId())
                .secret(authServerConfig.getClientSecret())
                .authorizedGrantTypes(SecurityConstants.REFRESH_TOKEN, SecurityConstants.PASSWORD,SecurityConstants.AUTHORIZATION_CODE)
                .scopes(authServerConfig.getScope());
    }

    @Override
    public void configure(AuthorizationServerEndpointsConfigurer endpoints) {
        endpoints
                .tokenStore(new RedisTokenStore(redisConnectionFactory))
                .accessTokenConverter(jwtAccessTokenConverter())
                .authenticationManager(authenticationManager)
                .exceptionTranslator(pigWebResponseExceptionTranslator)
                .reuseRefreshTokens(false)
                .userDetailsService(userDetailsService);
    }

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

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

    @Bean
    public JwtAccessTokenConverter jwtAccessTokenConverter() {
        JwtAccessTokenConverter jwtAccessTokenConverter = new JwtAccessTokenConverter();
        jwtAccessTokenConverter.setSigningKey(CommonConstant.SIGN_KEY);
        return jwtAccessTokenConverter;
    }

}

配置完成体验

1. 访问SSO客户端的 index.html
2. 重定向到SSO服务端的 Basic 认证
3. 输入账号密码又重定向到原请求的 客户端index资源

总结

• 客户端访问服务端 403问题？ 用户需要拥有ROLE_USER的权限，具体的可以通过日志可以查看到报错。
• Possible CSRF detected – state parameter was present but no state could be found 目前是通过设置session： never或者 cotext-path解决
• 源码请参考 https://gitee.com/log4j/ 基于Spring Cloud、Spring Security Oauth2.0开发企业级认证与授权，提供常见服务监控、链路追踪、日志分析、缓存管理、任务调度等实现