授权服务器变迁
授权服务器（Authorization Server）目前并没有集成在Spring Security项目中，而是作为独立项目存在于Spring生态中，图1为Spring Authorization Server 在Spring 项目列表中的位置。
Spring Authorization Server 为什么没被集成在Spring Security中呢？
起因是因为Spring 中的Spring Security OAuth、Spring Cloud Security都对OAuth有自己的实现，Spring团队开始是想把OAuth独立出来放到Spring Security中，但是后面Spring团队意识到OAuth授权服务并不适合包含在Spring Security框架中，于是在2019年11月Spring宣布不在Spring Security中支持授权服务器。
但是对于Spring Security不再支持授权服务器，社区反应强烈。于是在2020年4月，Spring推出了Spring Authorization Server项目。
目前项目最新GA版本为0.3 GA，预览版本1.0.0-M1。
最小化配置
安装授权服务器
1、新创建一个Spring Boot项目，命名为 spring-security-authorization-server
2、引入pom依赖
<pre class="prettyprint hljs xml" style="padding: 0.5em; font-family: Menlo, Monaco, Consolas, "Courier New", monospace; color: rgb(68, 68, 68); border-radius: 4px; display: block; margin: 0px 0px 1.5em; font-size: 14px; line-height: 1.5em; word-break: break-all; overflow-wrap: break-word; white-space: pre; background-color: rgb(246, 246, 246); border: none; overflow-x: auto;"><dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-security</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.security</groupId>
<artifactId>spring-security-oauth2-authorization-server</artifactId>
<version>0.3.1</version>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
配置授权服务器
<pre class="prettyprint hljs livescript" style="padding: 0.5em; font-family: Menlo, Monaco, Consolas, "Courier New", monospace; color: rgb(68, 68, 68); border-radius: 4px; display: block; margin: 0px 0px 1.5em; font-size: 14px; line-height: 1.5em; word-break: break-all; overflow-wrap: break-word; white-space: pre; background-color: rgb(246, 246, 246); border: none; overflow-x: auto;">import com.nimbusds.jose.jwk.JWKSet;
import com.nimbusds.jose.jwk.RSAKey;
import com.nimbusds.jose.jwk.source.ImmutableJWKSet;
import com.nimbusds.jose.jwk.source.JWKSource;
import com.nimbusds.jose.proc.SecurityContext;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.core.Ordered;
import org.springframework.core.annotation.Order;
import org.springframework.security.config.Customizer;
import org.springframework.security.config.annotation.web.builders.HttpSecurity;
import org.springframework.security.config.annotation.web.configurers.oauth2.server.authorization.OAuth2AuthorizationServerConfigurer;
import org.springframework.security.core.userdetails.User;
import org.springframework.security.core.userdetails.UserDetails;
import org.springframework.security.core.userdetails.UserDetailsService;
import org.springframework.security.crypto.factory.PasswordEncoderFactories;
import org.springframework.security.oauth2.core.AuthorizationGrantType;
import org.springframework.security.oauth2.core.ClientAuthenticationMethod;
import org.springframework.security.oauth2.core.oidc.OidcScopes;
import org.springframework.security.oauth2.server.authorization.client.InMemoryRegisteredClientRepository;
import org.springframework.security.oauth2.server.authorization.client.RegisteredClient;
import org.springframework.security.oauth2.server.authorization.client.RegisteredClientRepository;
import org.springframework.security.oauth2.server.authorization.config.ClientSettings;
import org.springframework.security.oauth2.server.authorization.config.ProviderSettings;
import org.springframework.security.provisioning.InMemoryUserDetailsManager;
import org.springframework.security.web.SecurityFilterChain;
import org.springframework.security.web.authentication.LoginUrlAuthenticationEntryPoint;
import org.springframework.security.web.util.matcher.RequestMatcher;
import java.security.KeyPair;
import java.security.KeyPairGenerator;
import java.security.interfaces.RSAPrivateKey;
import java.security.interfaces.RSAPublicKey;
import java.util.UUID;
@Configuration(proxyBeanMethods = false)
public class AuthorizationServerConfig {
//授权端点过滤器链 @Bean @Order(Ordered.HIGHEST_PRECEDENCE) public SecurityFilterChain authorizationServerSecurityFilterChain(HttpSecurity http) throws Exception { OAuth2AuthorizationServerConfigurer<HttpSecurity> authorizationServerConfigurer = new OAuth2AuthorizationServerConfigurer<>(); RequestMatcher endpointsMatcher = authorizationServerConfigurer .getEndpointsMatcher(); http //没有认证会自动跳转到/login页面
.exceptionHandling((exceptions) -> exceptions .authenticationEntryPoint( new LoginUrlAuthenticationEntryPoint("/login")) ) .requestMatcher(endpointsMatcher) .authorizeRequests(authorizeRequests -> authorizeRequests.anyRequest().authenticated() ) .csrf(csrf -> csrf.ignoringRequestMatchers(endpointsMatcher)) .apply(authorizationServerConfigurer); return http.build(); } //用于身份验证的过滤器链 @Bean @Order(2) public SecurityFilterChain defaultSecurityFilterChain(HttpSecurity http) throws Exception { http .authorizeHttpRequests((authorize) -> authorize .anyRequest().authenticated() ) .formLogin(Customizer.withDefaults()); return http.build(); } //配置主体用户 @Bean public UserDetailsService userDetailsService() { UserDetails userDetails = User.withDefaultPasswordEncoder() .username("user") .password("user") .roles("USER") .build(); return new InMemoryUserDetailsManager(userDetails); } //注册客户端 @Bean public RegisteredClientRepository registeredClientRepository() { RegisteredClient registeredClient = RegisteredClient.withId(UUID.randomUUID().toString()) //客户端id .clientId("testClientId") //客户端秘钥，授权服务器需要加密存储 .clientSecret(PasswordEncoderFactories.createDelegatingPasswordEncoder().encode("testClientSecret")) //授权方法 .clientAuthenticationMethod(ClientAuthenticationMethod.CLIENT_SECRET_BASIC) //支持的授权类型 .authorizationGrantType(AuthorizationGrantType.AUTHORIZATION_CODE) .authorizationGrantType(AuthorizationGrantType.REFRESH_TOKEN) .authorizationGrantType(AuthorizationGrantType.CLIENT_CREDENTIALS) //回调地址，支持多个，本地测试不能使用localhost .redirectUri("http://127.0.0.1:8080/login/oauth2/code/customize") .scope(OidcScopes.OPENID) //授权scope .scope("message.read") .scope("userinfo") .scope("message.write") //是否需要授权页面，开启跳转到授权页面，需要手动确认 .clientSettings(ClientSettings.builder().requireAuthorizationConsent(true).build()) .build(); return new InMemoryRegisteredClientRepository(registeredClient); } //token加密 @Bean public JWKSource<SecurityContext> jwkSource() { KeyPair keyPair = generateRsaKey(); RSAPublicKey publicKey = (RSAPublicKey) keyPair.getPublic(); RSAPrivateKey privateKey = (RSAPrivateKey) keyPair.getPrivate(); RSAKey rsaKey = new RSAKey.Builder(publicKey) .privateKey(privateKey) .keyID(UUID.randomUUID().toString()) .build(); JWKSet jwkSet = new JWKSet(rsaKey); return new ImmutableJWKSet<>(jwkSet); } private static KeyPair generateRsaKey() { KeyPair keyPair; try { KeyPairGenerator keyPairGenerator = KeyPairGenerator.getInstance("RSA"); keyPairGenerator.initialize(2048); keyPair = keyPairGenerator.generateKeyPair(); } catch (Exception ex) { throw new IllegalStateException(ex); } return keyPair; } //配置协议端点，比如/oauth2/authorize、/oauth2/token等 @Bean public ProviderSettings providerSettings() { return ProviderSettings.builder().build(); } }
如上是最小化授权服务器的配置，这里我们将授权主体和客户端都存储在内存中，当然也可以持久化到数据库中，分别使用 JdbcUserDetailsManager 、 JdbcRegisteredClientRepository 。
ProviderSettings.builder().build() 使用了默认的配置，这几个地址我们后面就会用到：
<pre class="prettyprint hljs less" style="padding: 0.5em; font-family: Menlo, Monaco, Consolas, "Courier New", monospace; color: rgb(68, 68, 68); border-radius: 4px; display: block; margin: 0px 0px 1.5em; font-size: 14px; line-height: 1.5em; word-break: break-all; overflow-wrap: break-word; white-space: pre; background-color: rgb(246, 246, 246); border: none; overflow-x: auto;">public static Builder builder() {
return new Builder()
.authorizationEndpoint("/oauth2/authorize")
.tokenEndpoint("/oauth2/token")
.jwkSetEndpoint("/oauth2/jwks")
.tokenRevocationEndpoint("/oauth2/revoke")
.tokenIntrospectionEndpoint("/oauth2/introspect")
.oidcClientRegistrationEndpoint("/connect/register")
.oidcUserInfoEndpoint("/userinfo");
}
:exclamation: 官方指出@Import(OAuth2AuthorizationServerConfiguration.class)也可以用来最小化配置，但我亲测这种方式没多大用处，并且还有问题。
配置客户端
这里我们要使用自己的搭建授权服务器，需要自定义一个客户端，还是使用前面集成GitHub的示例，只要在配置文件中扩展就可以。
完整配置如下：
<pre class="prettyprint hljs less" style="padding: 0.5em; font-family: Menlo, Monaco, Consolas, "Courier New", monospace; color: rgb(68, 68, 68); border-radius: 4px; display: block; margin: 0px 0px 1.5em; font-size: 14px; line-height: 1.5em; word-break: break-all; overflow-wrap: break-word; white-space: pre; background-color: rgb(246, 246, 246); border: none; overflow-x: auto;">spring:
security:
oauth2:
client:
registration:
gitee:
client-id: gitee_clientId
client-secret: gitee_secret
authorization-grant-type: authorization_code
redirect-uri: '{baseUrl}/login/oauth2/code/{registrationId}'
client-name: Gitee
github:
client-id: github_clientId
client-secret: github_secret
# 自定义
customize:
client-id: testClientId
client-secret: testClientSecret
authorization-grant-type: authorization_code
redirect-uri: '{baseUrl}/login/oauth2/code/{registrationId}'
client-name: Customize
scope:
- userinfo
provider:
gitee:
authorization-uri: https://gitee.com/oauth/authorize
token-uri: https://gitee.com/oauth/token
user-info-uri: https://gitee.com/api/v5/user
user-name-attribute: name
# 自定义
customize:
authorization-uri: http://localhost:9000/oauth2/authorize
token-uri: http://localhost:9000/oauth2/token
user-info-uri: http://localhost:9000/userinfo
user-name-attribute: username
:exclamation: 在配置授权服务器uri的时候，请勿依旧使用127.0.0.1，由于是在本地测试，授权服务器的session和客户端的session会互相覆盖，导致莫名其妙的问题。
请区分回调地址，和授权服务器端点uri的地址。
客户端的session
授权服务器的session
另外为了能够更好的调式，可以在两个应用增加 @EnableWebSecurity(debug = true) 和 log日志，日志如下,打开 TRACE 级别日志：
<pre class="prettyprint hljs css" style="padding: 0.5em; font-family: Menlo, Monaco, Consolas, "Courier New", monospace; color: rgb(68, 68, 68); border-radius: 4px; display: block; margin: 0px 0px 1.5em; font-size: 14px; line-height: 1.5em; word-break: break-all; overflow-wrap: break-word; white-space: pre; background-color: rgb(246, 246, 246); border: none; overflow-x: auto;">logging:
level:
root: INFO
org.springframework.web: INFO
org.springframework.security: TRACE
org.springframework.security.oauth2: TRACE
现在启动两个应用，访问 http://127.0.0.1:8080/hello ，自动跳转到登录页面。
点击 Customize ，将跳转至授权服务器，注意看地址栏地址为localhost:9000/login，输入 用户名/密码登录，user/user 。
登录后，将跳转至授权页面，由于我们没有定制，使用的是默认页面，可以看到该页面的地址为
http://localhost:9000/oauth2/authorize?response_type=code&client_id=testClientId&scope=userinfo&state=yV1ElAN2855yq3bY5kgj_rmilnCclyvZHkxVB7a1d84%3D&redirect_uri=http://127.0.0.1:8080/login/oauth2/code/customize 。
我们勾选userinfo，提交后即跳转回客户端。
我们看下客户收到的日志，授权服务器带着code回调了我们填写的回调地址。
Request received for GET '/login/oauth2/code/customize?code=DPAlx5uyrUpfrZIlBKrpIy_mmcgiyC2qCxPFtUeLA0fBrZd238XM2vN8M1jv9XAgl0KA-D54P_KzVH7RbUw7ApBUc2pbnuSVRZUyHazozmNM4YgQ06CZryfr20qLRhW4&state=_Sgak7GLILLKbwr9JVuwA2xVp95CWPgUMByQcvePkgM%3D'
<pre class="prettyprint hljs markdown" style="padding: 0.5em; font-family: Menlo, Monaco, Consolas, "Courier New", monospace; color: rgb(68, 68, 68); border-radius: 4px; display: block; margin: 0px 0px 1.5em; font-size: 14px; line-height: 1.5em; word-break: break-all; overflow-wrap: break-word; white-space: pre; background-color: rgb(246, 246, 246); border: none; overflow-x: auto;">************************************************************
Request received for GET '/login/oauth2/code/customize?code=DPAlx5uyrUpfrZIlBKrpIy_mmcgiyC2qCxPFtUeLA0fBrZd238XM2vN8M1jv9XAgl0KA-D54P_KzVH7RbUw7ApBUc2pbnuSVRZUyHazozmNM4YgQ06CZryfr20qLRhW4&state=_Sgak7GLILLKbwr9JVuwA2xVp95CWPgUMByQcvePkgM%3D':
org.apache.catalina.connector.RequestFacade@1a8761d0
servletPath:/login/oauth2/code/customize
pathInfo:null
headers:
host: 127.0.0.1:8080
connection: keep-alive
upgrade-insecure-requests: 1
user-agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/104.0.0.0 Safari/537.36
accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.9
sec-fetch-site: cross-site
sec-fetch-mode: navigate
sec-fetch-user: ?1
sec-fetch-dest: document
sec-ch-ua: "Chromium";v="104", " Not A;Brand";v="99", "Google Chrome";v="104"
sec-ch-ua-mobile: ?0
sec-ch-ua-platform: "Windows"
referer: http://127.0.0.1:8080/
accept-encoding: gzip, deflate, br
accept-language: zh-CN,zh;q=0.9,en-US;q=0.8,en;q=0.7
cookie: JSESSIONID=2527F412F53FA27A30BFBC39161ABB63
Security filter chain: [
DisableEncodeUrlFilter
WebAsyncManagerIntegrationFilter
SecurityContextPersistenceFilter
HeaderWriterFilter
CsrfFilter
LogoutFilter
OAuth2AuthorizationRequestRedirectFilter
OAuth2AuthorizationRequestRedirectFilter
OAuth2LoginAuthenticationFilter
DefaultLoginPageGeneratingFilter
DefaultLogoutPageGeneratingFilter
RequestCacheAwareFilter
SecurityContextHolderAwareRequestFilter
AnonymousAuthenticationFilter
OAuth2AuthorizationCodeGrantFilter
SessionManagementFilter
ExceptionTranslationFilter
FilterSecurityInterceptor
]
Spring Security 的最小化授权服务器的配置，到这里结束了，该demo虽然代码量非常少，但涉及的知识非常多，并且坑也多。
Spring Security文档中的代码说明更新不及时，比如 @Import(OAuth2AuthorizationServerConfiguration.class) 文档中说明是最小化配置，但文档的 快速开始 又提供了另外一种的最小化配置方式。
另外授权服务器如果发生异常，是不会打印堆栈的，而是把错误信息放入到response中，是打算要在页面上显示，然而demo的默认错误页并不会显示错误详情，只有错误编号400，如图。
Spring Authorization Server 还需要多多完善，Spring Security也不例外，不久前我还提了一个PR，把一个持续数个版本的bug给修复了藍（过了，只是文档中的错误罢了，被标记为文档中的bug），看多了外国人的产品，其实也没有太比国内的开源项目好，坑也很多，而我们某些大厂的开源项目其实很好，却被网友门各种喷。
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