spring security集成cas

时间 2019-11-16

原文原文链接

spring security集成cas

源码地址在文章末尾，转载请注明出处，谢谢。html

0.配置本地ssl链接

操做记录以下：java

=====================1.建立证书文件thekeystore ，并导出为thekeystore.crt
cd C:\Users\23570\keystore

C:\Users\23570\keystore>keytool -genkey -keyalg RSA -alias thekeystore -keystore thekeystore
输入密钥库口令:changeit
再次输入新口令:changeit
您的名字与姓氏是什么?
  [Unknown]:  localhost
您的组织单位名称是什么?
  [Unknown]:  localhost
您的组织名称是什么?
  [Unknown]:
您所在的城市或区域名称是什么?
  [Unknown]:
您所在的省/市/自治区名称是什么?
  [Unknown]:
该单位的双字母国家/地区代码是什么?
  [Unknown]:
CN=localhost, OU=localhost, O=Unknown, L=Unknown, ST=Unknown, C=Unknown是否正确?
  [否]:  y

输入 <thekeystore> 的密钥口令
        (若是和密钥库口令相同, 按回车):

Warning:
JKS 密钥库使用专用格式。建议使用 "keytool -importkeystore -srckeystore thekeystore -destkeystore thekeystore -deststoretype pkcs12" 迁移到行业标准格式 PKCS12。

C:\Users\23570\keystore>keytool -export -alias thekeystore -file thekeystore.crt -keystore thekeystore
输入密钥库口令:
存储在文件 <thekeystore.crt> 中的证书

Warning:
JKS 密钥库使用专用格式。建议使用 "keytool -importkeystore -srckeystore thekeystore -destkeystore thekeystore -deststoretype pkcs12" 迁移到行业标准格式 PKCS12。


======================2.把证书文件导入到本地证书库中，注意切换JRE相应目录
切换为【管理员身份】运行如下命令：

C:\Users\23570\keystore>keytool -import -alias thekeystore -storepass changeit -file thekeystore.crt -keystore "C:\Program Files\Java\jdk1.8.0_191\jre\lib\security\cacerts"
全部者: CN=localhost, OU=localhost, O=Unknown, L=Unknown, ST=Unknown, C=Unknown
发布者: CN=localhost, OU=localhost, O=Unknown, L=Unknown, ST=Unknown, C=Unknown
序列号: 657eb9ce
有效期为 Fri Mar 29 11:50:08 CST 2019 至 Thu Jun 27 11:50:08 CST 2019
证书指纹:
         MD5:  8D:3C:78:E9:8A:44:77:3F:C2:8B:20:95:C7:6C:91:8F
         SHA1: 69:F3:46:C4:03:95:E1:D0:E6:9D:8B:72:F4:EB:ED:13:8B:9A:6A:38
         SHA256: 79:D1:F8:B2:1B:E3:AF:D4:4F:35:CB:6B:C8:84:3F:85:21:13:0F:96:4A:B5:E5:4C:47:11:44:21:8F:F3:2D:83
签名算法名称: SHA256withRSA
主体公共密钥算法: 2048 位 RSA 密钥
版本: 3

扩展:

#1: ObjectId: 2.5.29.14 Criticality=false
SubjectKeyIdentifier [
KeyIdentifier [
0000: B0 38 1D 00 56 65 EE 98   7C 35 58 04 B5 2E C0 A0  .8..Ve...5X.....
0010: D5 C2 C5 B5                                        ....
]
]

是否信任此证书? [否]:  y
证书已添加到密钥库中

=========================3.配置tomcat/conf/server.xml中的ssl链接

<Connector port="8443" protocol="org.apache.coyote.http11.Http11NioProtocol"
           maxThreads="200" SSLEnabled="true" scheme="https"
           secure="true" clientAuth="false" sslProtocol="TLS"
           keystoreFile="C:\Users\23570\keystore\thekeystore"
           keystorePass="changeit"/>
           
==========================4.其余命令参考
删除JRE中指定别名的证书
keytool -delete -alias cas.server.com -keystore "C:\Program Files\Java\jdk1.8.0_191\jre\lib\security\cacerts"

查看JRE中指定别名的证书
keytool -list -v -keystore "C:\Program Files\Java\jdk1.8.0_191\jre\lib\security\cacerts" -alias cas.server.com

1.cas服务搭建

git clone --branch 5.3 https://github.com/apereo/cas-overlay-template.git cas-server

注意：mysql

这里选用cas server 5.3版本，使用maven构建git

1.使用数据库帐号密码登陆cas

导入依赖github

<dependency>
    <groupId>org.apereo.cas</groupId>
    <artifactId>cas-server-support-jdbc</artifactId>
    <version>${cas.version}</version>
</dependency>

<dependency>
    <groupId>mysql</groupId>
    <artifactId>mysql-connector-java</artifactId>
    <version>5.1.47</version>
</dependency>

配置查询web

#这里是配置用户表单登陆时用户名字段为username
cas.authn.jdbc.query[0].sql=select password from oauth_account left join oauth_user on oauth_account.user_id=oauth_user.user_id where oauth_user.username=?;
cas.authn.jdbc.query[0].fieldPassword=password
cas.authn.jdbc.query[0].fieldExpired=expired
cas.authn.jdbc.query[0].fieldDisabled=disabled

cas.authn.jdbc.query[0].dialect=org.hibernate.dialect.MySQLDialect
cas.authn.jdbc.query[0].driverClass=com.mysql.jdbc.Driver
cas.authn.jdbc.query[0].url=jdbc:mysql://127.0.0.1:3306/srm-aurora2?useUnicode=true&characterEncoding=UTF-8&autoReconnect=true&useSSL=false
cas.authn.jdbc.query[0].user=root
cas.authn.jdbc.query[0].password=root

#默认不加密
#cas.authn.jdbc.query[0].passwordEncoder.type=NONE

#默认加密策略，经过encodingAlgorithm来指定算法，默认NONE不加密
cas.authn.jdbc.query[0].passwordEncoder.type=DEFAULT
cas.authn.jdbc.query[0].passwordEncoder.characterEncoding=UTF-8
cas.authn.jdbc.query[0].passwordEncoder.encodingAlgorithm=MD5

#配置用户表单登陆时用户名字段为phone
cas.authn.jdbc.query[1].sql=select password from oauth_account left join oauth_user on oauth_account.user_id=oauth_user.user_id where oauth_user.phone=?;
cas.authn.jdbc.query[1].fieldPassword=password
cas.authn.jdbc.query[1].fieldExpired=expired
cas.authn.jdbc.query[1].fieldDisabled=disabled

cas.authn.jdbc.query[1].dialect=org.hibernate.dialect.MySQLDialect
cas.authn.jdbc.query[1].driverClass=com.mysql.jdbc.Driver
cas.authn.jdbc.query[1].url=jdbc:mysql://127.0.0.1:3306/srm-aurora2?useUnicode=true&characterEncoding=UTF-8&autoReconnect=true&useSSL=false
cas.authn.jdbc.query[1].user=root
cas.authn.jdbc.query[1].password=root

#默认不加密
#cas.authn.jdbc.query[0].passwordEncoder.type=NONE

#默认加密策略，经过encodingAlgorithm来指定算法，默认NONE不加密
cas.authn.jdbc.query[1].passwordEncoder.type=DEFAULT
cas.authn.jdbc.query[1].passwordEncoder.characterEncoding=UTF-8
cas.authn.jdbc.query[1].passwordEncoder.encodingAlgorithm=MD5

数据库脚本算法

/*
 Navicat Premium Data Transfer

 Source Server         : localhost
 Source Server Type    : MySQL
 Source Server Version : 50722
 Source Host           : localhost:3306
 Source Schema         : srm-aurora2

 Target Server Type    : MySQL
 Target Server Version : 50722
 File Encoding         : 65001

 Date: 19/04/2019 14:40:52
*/

SET NAMES utf8mb4;
SET FOREIGN_KEY_CHECKS = 0;

-- ----------------------------
-- Table structure for oauth_account
-- ----------------------------
DROP TABLE IF EXISTS `oauth_account`;
CREATE TABLE `oauth_account`  (
  `account_id` int(255) NOT NULL AUTO_INCREMENT,
  `tenant_id` int(255) NULL DEFAULT NULL,
  `user_id` int(255) NULL DEFAULT NULL,
  `password` varchar(255) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL,
  PRIMARY KEY (`account_id`) USING BTREE
) ENGINE = InnoDB AUTO_INCREMENT = 3 CHARACTER SET = utf8 COLLATE = utf8_general_ci ROW_FORMAT = Dynamic;

-- ----------------------------
-- Records of oauth_account
-- ----------------------------
INSERT INTO `oauth_account` VALUES (1, 1, 1, 'e10adc3949ba59abbe56e057f20f883e');
INSERT INTO `oauth_account` VALUES (2, 2, 2, 'e10adc3949ba59abbe56e057f20f883e');

-- ----------------------------
-- Table structure for oauth_cas_info
-- ----------------------------
DROP TABLE IF EXISTS `oauth_cas_info`;
CREATE TABLE `oauth_cas_info`  (
  `cas_id` int(255) NOT NULL,
  `tenant_id` int(255) NULL DEFAULT NULL,
  `cas_server` varchar(255) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL,
  `cas_server_login` varchar(255) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL,
  `cas_server_logout` varchar(255) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL,
  `cas_service` varchar(255) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL,
  `cas_service_logout` varchar(255) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL,
  PRIMARY KEY (`cas_id`) USING BTREE
) ENGINE = InnoDB CHARACTER SET = utf8 COLLATE = utf8_general_ci ROW_FORMAT = Dynamic;

-- ----------------------------
-- Records of oauth_cas_info
-- ----------------------------
INSERT INTO `oauth_cas_info` VALUES (1, 2, 'https://localhost:8443/cas', 'https://localhost:8443/cas/login?service=http%3A%2F%2Flocalhost%3A8083%2Flogin%2Fcas', 'https://localhost:8443/cas/logout', 'http://localhost:8083/login/cas', 'https://localhost:8443/cas/logout?service=http://localhost:8083/logout/success');
INSERT INTO `oauth_cas_info` VALUES (2, 3, 'https://localhost:9443/sso', 'https://localhost:9443/sso/login?service=http%3A%2F%2Flocalhost%3A8083%2Flogin%2Fcas', 'https://localhost:9443/sso/logout', 'http://localhost:8083/login/cas', 'https://localhost:9443/sso/logout?service=http://localhost:8083/logout/success');

-- ----------------------------
-- Table structure for oauth_tenant
-- ----------------------------
DROP TABLE IF EXISTS `oauth_tenant`;
CREATE TABLE `oauth_tenant`  (
  `tenant_id` int(255) NOT NULL AUTO_INCREMENT,
  `domain` varchar(255) CHARACTER SET utf8 COLLATE utf8_general_ci NOT NULL,
  `name` varchar(255) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL,
  `login_provider` varchar(255) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL,
  `login_type` varchar(255) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL,
  PRIMARY KEY (`tenant_id`) USING BTREE
) ENGINE = InnoDB AUTO_INCREMENT = 4 CHARACTER SET = utf8 COLLATE = utf8_general_ci ROW_FORMAT = Dynamic;

-- ----------------------------
-- Records of oauth_tenant
-- ----------------------------
INSERT INTO `oauth_tenant` VALUES (1, 'http://localhost:8084/', 'a租户', 'oauth', 'form');
INSERT INTO `oauth_tenant` VALUES (2, 'http://localhost:8085/', 'b租户', 'cas', 'wechat');
INSERT INTO `oauth_tenant` VALUES (3, 'http://localhost:8086/', 'c租户', 'cas', 'form');

-- ----------------------------
-- Table structure for oauth_user
-- ----------------------------
DROP TABLE IF EXISTS `oauth_user`;
CREATE TABLE `oauth_user`  (
  `user_id` int(255) NOT NULL AUTO_INCREMENT,
  `username` varchar(255) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL,
  `phone` varchar(255) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL,
  `email` varchar(255) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL,
  PRIMARY KEY (`user_id`) USING BTREE
) ENGINE = InnoDB AUTO_INCREMENT = 3 CHARACTER SET = utf8 COLLATE = utf8_general_ci ROW_FORMAT = Dynamic;

-- ----------------------------
-- Records of oauth_user
-- ----------------------------
INSERT INTO `oauth_user` VALUES (1, '22304', '15797656200', 'donglin.ling@hand-china.com');
INSERT INTO `oauth_user` VALUES (2, 'admin', '15797656201', 'ericling666@gmail.com');

SET FOREIGN_KEY_CHECKS = 1;

发布cas server，访问：spring

https://localhost:8443/cas/loginsql

测试帐号和密码，admin:123456shell

2.CAS客户端服务注册

这里演示经过json文件注册服务，实际项目中，能够配置成从数据库中注册

添加json支持依赖

<!--json服务注册-->
<dependency>
    <groupId>org.apereo.cas</groupId>
    <artifactId>cas-server-support-json-service-registry</artifactId>
    <version>${cas.version}</version>
</dependency>

添加json服务注册文件

{
  "@class" : "org.apereo.cas.services.RegexRegisteredService",
  "serviceId" : "^(https|http|imaps)://.*",
  "name" : "HTTPS and HTTP and IMAPS",
  "id" : 10000001,
  "description" : "This service definition authorizes all application urls that support HTTPS and HTTP and IMAPS protocols.",
  "evaluationOrder" : 10000,
  "attributeReleasePolicy": {
    "@class": "org.apereo.cas.services.ReturnAllAttributeReleasePolicy"
  },
  "proxyPolicy": {
    "@class": "org.apereo.cas.services.RegexMatchingRegisteredServiceProxyPolicy",
    "pattern": "^(https|http)?://.*"
  }
}

注意文件目录和文件名格式：

目录：resources/services/{xxx}-{id}.json

xxx表示能够随意配置，后面-{id}，这里的id须要和文件中的id一致。

做为演示，这个json注册文件，没有限制域名，也就是说全部的服务均可以注册成功。

开启json服务注册

##
# 开启json服务注册
#
cas.serviceRegistry.initFromJson=true

以上就是配置json服务注册的过程。

3.其它经常使用配置

##
# 登出后容许跳转到指定页面
#
cas.logout.followServiceRedirects=true

# 设置service ticket的行为
# cas.ticket.st.maxLength=20
# cas.ticket.st.numberOfUses=1
cas.ticket.st.timeToKillInSeconds=120

# 设置proxy ticket的行为
cas.ticket.pt.timeToKillInSeconds=120
# cas.ticket.pt.numberOfUses=1

配置说明：

配置cas服务登出时，是否跳转到各个子服务的登出页面，默认false【即默认状况下，子服务点击登出，用户统一跳转到cas的登出页面】，子服务登出时访问cas登出端点，并带上service。

示例：https://localhost:8443/cas/logout?service=http://localhost:8083/logout/success

这样配置，cas注销session以后，会重定向到service。

这个字段能够配置，默认是service。配置以下：
```
cas.logout.redirectParameter=service
```
配置service ticket的失效时间，我这里配置这个选项，是为了方便后面debug调试，实际生产中，没必要配置这个选项。

更多经常使用配置项，请查看官网连接：https://apereo.github.io/cas/...

2.spring security和cas集成

1.依赖和其余配置

核心依赖

<!--security-cas集成-->
<dependency>
    <groupId>org.springframework.security</groupId>
    <artifactId>spring-security-cas</artifactId>
</dependency>

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-security</artifactId>
</dependency>

application.yml配置

# 我这里是为了方便调试
logging.level.org.springframework.security: debug
logging.level.web: debug

2.配置登陆端点

spring security开启表单登录

@Override
    protected void configure(HttpSecurity http) throws Exception {
        http.formLogin().loginPage("/login");
    }

这个配置，会开启用户表单登陆，而且配置登陆端点为/login

配置登陆端点响应逻辑

@Controller
public class LoginEndpointConfig {

    @Autowired
    private TenantService tenantService;

    @Autowired
    private CasInfoService casInfoService;

    @GetMapping("/login")
    public String loginJump(HttpSession session) {
        final String SAVED_REQUEST = "SPRING_SECURITY_SAVED_REQUEST";
        Object attribute = session.getAttribute(SAVED_REQUEST);
        if (attribute == null) {
            //默认跳转到登录页面
            return "login";
        }
        if (attribute instanceof DefaultSavedRequest) {
            DefaultSavedRequest savedRequest = (DefaultSavedRequest) attribute;
            List<String> referer = savedRequest.getHeaderValues("referer");
            if (referer.size() == 1) {
                //有referer请求头
                String domain = referer.get(0);
                Tenant tenant = tenantService.selectByDomain(domain);
                if (tenant == null) {
                    return "login";
                } else {
                    String loginProvider = tenant.getLoginProvider();
                    switch (loginProvider) {
                        case "cas":
                            //获取cas地址
                            CasInfo casInfoByTenantId = casInfoService.getCasInfoByTenantId(tenant.getTenantId());
                            String casServerLogin = casInfoByTenantId.getCasServerLogin();
                            session.setAttribute("casInfoByTenantId",casInfoByTenantId);
                            return "redirect:" + casServerLogin;
                        case "oauth":
                            return "login";
                        default:
                            return "login";

                    }
                }

            } else {
                return "login";
            }
        }
        return "login";
    }
}

我这里的登录逻辑实现了：用户从第三方网站【平台的租户】跳转到这个网站时，根据跳转过来的请求头【referer】获取这个租户的域名，再从数据库中查找这个域名对应的租户信息和登陆逻辑。

这里的租户信息有一个关键字段是：loginProvider，有两种状况cas，oauth

cas:租户有本身的cas单点登陆系统，平台须要和租户的cas集成
oauth：租户没有cas，使用平台统一的表单登录

具体的登陆流程分析，在最后详细介绍，这里不过多讲解。

3.配置CAS的ticket校验以及登陆响应

自定义AuthenticationFilter

由于个人需求是，每一个租户有本身的cas系统，因此每一个cas地址不同，不可能使用官方的CasAuthenticationFilter 。具体缘由是，官方的CasAuthenticationFilter在应用程序启动时，资源匹配器就已经初始化好了，它只会对特定的cas地址发送ticket校验请求。而要作到可配置，就只能本身实现这个逻辑，而且可配置的对相应cas server地址发出ticket校验请求。

public class CustomCasAuthenticationFilter extends AbstractAuthenticationProcessingFilter {
    private final static String endpoint = "/login/cas";

    private UserDetailsService userDetailsService;

    public CustomCasAuthenticationFilter(String defaultFilterProcessesUrl, UserDetailsService userDetailsService) {
        super(defaultFilterProcessesUrl);
        this.userDetailsService = userDetailsService;
    }

    private AuthenticationSuccessHandler successHandler = new SavedRequestAwareAuthenticationSuccessHandler();
    private AuthenticationFailureHandler failureHandler = new SimpleUrlAuthenticationFailureHandler();

    public CustomCasAuthenticationFilter() {
        super(new AntPathRequestMatcher(endpoint));
    }

    @Override
    public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException {
        HttpServletRequest req = (HttpServletRequest) request;
        HttpServletResponse res = (HttpServletResponse) response;
        if (!requiresAuthentication(req, res)) {
            chain.doFilter(request, response);
            return;
        }
        String ticket = obtainArtifact(req);
        //开始校验ticket
        try {
            CasInfo casInfo = (CasInfo) req.getSession().getAttribute("casInfoByTenantId");
            if (StringUtils.hasText(casInfo.getCasServer())) {
                //获取当前项目地址
                String service;
                int port = request.getServerPort();
                if (port != 80) {
                    service = request.getScheme() + "://" + request.getServerName() + ":" + request.getServerPort() + endpoint;
                } else {
                    service = request.getScheme() + "://" + request.getServerName() + endpoint;
                }
                //开始校验ticket
                Assertion validateResult = getTicketValidator(casInfo.getCasServer()).validate(ticket, service);
                //根据校验结果，获取用户详细信息
                UserDetails userDetails = null;
                try {
                    userDetails = userDetailsService.loadUserByUsername(validateResult.getPrincipal().getName());
                    if (this.logger.isDebugEnabled()) {
                        logger.debug("userDetailsServiceImpl is loading username:"+validateResult.getPrincipal().getName());
                    }
                } catch (UsernameNotFoundException e) {
                    unsuccessfulAuthentication(req, res, e);
                }
                //手动封装authentication对象
                assert userDetails != null;
                UsernamePasswordAuthenticationToken authentication = new UsernamePasswordAuthenticationToken(validateResult.getPrincipal(), ticket, userDetails.getAuthorities());
                authentication.setDetails(userDetails);
                successfulAuthentication(req,res,chain,authentication);


            } else {
                unsuccessfulAuthentication(req, res, new BadCredentialsException("bad credential:ticket校验失败"));
            }
        } catch (TicketValidationException e) {
            //ticket校验失败
            unsuccessfulAuthentication(req, res, new BadCredentialsException(e.getMessage()));
        }
//        chain.doFilter(request, response);
    }

    /**

*/
   public Authentication attemptAuthentication(HttpServletRequest request, HttpServletResponse response) throws IOException, ServletException {
       return null;
   }

   /**
    * 从HttpServletRequest请求中获取ticket
    */
   private String obtainArtifact(HttpServletRequest request) {
       String artifactParameter = "ticket";
       return request.getParameter(artifactParameter);
   }

   /**
    * 获取Cas30ServiceTicketValidator，暂时没有实现代理凭据
    */
   private TicketValidator getTicketValidator(String casServerUrlPrefix) {
       return new Cas30ServiceTicketValidator(casServerUrlPrefix);
   }

   protected void successfulAuthentication(HttpServletRequest request, HttpServletResponse response, FilterChain chain, Authentication authResult) throws IOException, ServletException {
       if (this.logger.isDebugEnabled()) {
           this.logger.debug("Authentication success. Updating SecurityContextHolder to contain: " + authResult);
       }

       SecurityContextHolder.getContext().setAuthentication(authResult);
       if (this.eventPublisher != null) {
           this.eventPublisher.publishEvent(new InteractiveAuthenticationSuccessEvent(authResult, this.getClass()));
       }

       this.successHandler.onAuthenticationSuccess(request, response, authResult);
   }

   protected void unsuccessfulAuthentication(HttpServletRequest request, HttpServletResponse response, AuthenticationException failed) throws IOException, ServletException {
       SecurityContextHolder.clearContext();
       if (this.logger.isDebugEnabled()) {
           this.logger.debug("Authentication request failed: " + failed.toString(), failed);
           this.logger.debug("Updated SecurityContextHolder to contain null Authentication");
           this.logger.debug("Delegating to authentication failure handler " + this.failureHandler);
       }

       this.failureHandler.onAuthenticationFailure(request, response, failed);
   }

}

2. 把自定义的`CustomCasAuthenticationFilter`添加到spring security的过滤器链中

@Qualifier("userDetailsServiceImpl")
@Autowired
private UserDetailsService userDetailsService;

private final static String endpoint = "/login/cas";

@Override
protected void configure(HttpSecurity http) throws Exception {

http.addFilterAt(new CustomCasAuthenticationFilter(endpoint, userDetailsService), UsernamePasswordAuthenticationFilter.class);

}

### 4.配置单点登出

1. 自定义实现`LogoutFilter`

public class CustomLogoutFilter extends GenericFilterBean {

private RequestMatcher logoutRequestMatcher;
   private SimpleUrlLogoutSuccessHandler urlLogoutSuccessHandler;
   private LogoutHandler logoutHandler = new SecurityContextLogoutHandler();

   //获取casInfo信息，依此来判断当前认证用户的cas地址
   private CasInfoService casInfoService;

   public CustomLogoutFilter(String filterProcessesUrl, String logoutSuccessUrl,CasInfoService casInfoService) {
       this.logoutRequestMatcher = new AntPathRequestMatcher(filterProcessesUrl);
       this.urlLogoutSuccessHandler=new SimpleUrlLogoutSuccessHandler();
       this.urlLogoutSuccessHandler.setDefaultTargetUrl(logoutSuccessUrl);
       this.casInfoService = casInfoService;
   }

   @Override
   public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {
       HttpServletRequest request = (HttpServletRequest) servletRequest;
       HttpServletResponse response = (HttpServletResponse) servletResponse;

       if (requiresLogout(request, response)) {
           Authentication auth = SecurityContextHolder.getContext().getAuthentication();

           if (logger.isDebugEnabled()) {
               logger.debug("Logging out user '" + auth
                       + "' and transferring to logout destination");
           }
           //本地登出
           logoutHandler.logout(request,response,auth);
           if (auth == null) {
               urlLogoutSuccessHandler.onLogoutSuccess(request,response, null);
           }else{
               //判断是否经过cas认证，获取cas信息
               Object details = auth.getDetails();
               if (details == null) {
                   urlLogoutSuccessHandler.onLogoutSuccess(request,response,auth);
               }
               if (details instanceof UserDetails) {
                   Integer tenantId = ((UserDetailsVO) details).getTenant().getTenantId();
                   CasInfo casInfoByTenantId = casInfoService.getCasInfoByTenantId(tenantId);
                   response.sendRedirect(casInfoByTenantId.getCasServiceLogout());
               }else{
                   urlLogoutSuccessHandler.onLogoutSuccess(request,response,auth);
               }
           }
           return;
       }

       filterChain.doFilter(request, response);

   }

   /**
    * 当前请求是否为登出请求
    */
   private boolean requiresLogout(HttpServletRequest request,
                                    HttpServletResponse response) {
       return logoutRequestMatcher.matches(request);
   }

}

2. 把`CustomLogoutFilter`添加到spring security的过滤器链中

@Override
protected void configure(HttpSecurity http) throws Exception {

http.addFilterAt(new CustomLogoutFilter("/logout", "/logout/success", casInfoService), LogoutFilter.class);

}

### 5.流程分析

#### 1.表单登录流程分析

目前有5个服务

cas server,tenant-a,tenant-b,tenant-c,a2-oauth

租户a，b，c就是一个超连接而已，为了模拟三个租户的域名，因此弄了三个租户。

这三个域名分别是：

`<http://localhost:8084/>` , `<http://localhost:8085/>` , `<http://localhost:8086/>`

数据库中，对这3个租户的配置以下：

![](http://ww1.sinaimg.cn/large/006edVQGgy1g27zywkcz7j30cy02o3ye.jpg)

其中b和c租户是配置了cas登陆的。

cas server发布了两个，都开了SSL连接，分别是：

https://localhost:8443/cas ，https://localhost:9443/sso

咱们先测试表单登陆。启动租户a，访问连接http://localhost:8084 ,这个页面只有一个超连接，点击超连接，访问

`http://localhost:8083/oauth/authorize?client_id=youku&response_type=token&redirect_uri=http://localhost:8081/youku/qq/redirect`

查看日志：

//前面通过spring security的一堆过滤器链，都没有匹配到
FrameworkEndpointHandlerMapping : Mapped to public org.springframework.web.servlet.ModelAndView org.springframework.security.oauth2.provider.endpoint.AuthorizationEndpoint.authorize(java.util.Map<java.lang.String, java.lang.Object>,java.util.Map<java.lang.String, java.lang.String>,org.springframework.web.bind.support.SessionStatus,java.security.Principal)

//用户未认证，没法受权，抛出异常，ExceptionTranslationFilter对异常处理，跳转到配置的authentication //entry point，这里的authentication entry point，就是我以前配置的/login端点
2019-04-19 16:01:14.608 DEBUG 21568 --- [nio-8083-exec-1] o.s.web.servlet.DispatcherServlet : Failed to complete request: org.springframework.security.authentication.InsufficientAuthenticationException: User must be authenticated with Spring Security before authorization can be completed.
2019-04-19 16:01:14.611 DEBUG 21568 --- [nio-8083-exec-1] o.s.s.w.a.ExceptionTranslationFilter : Authentication exception occurred; redirecting to authentication entry point

org.springframework.security.authentication.InsufficientAuthenticationException: User must be authenticated with Spring Security before authorization can be completed.

![](http://ww1.sinaimg.cn/large/006edVQGgy1g280cpeufpj311y0jvwju.jpg)

能够看到，已经进入到了controller里面。

final String SAVED_REQUEST = "SPRING_SECURITY_SAVED_REQUEST";

Object attribute = session.getAttribute(SAVED_REQUEST);

这段代码的做用是为了拿到，以前发起的请求。那么这个请求是何时被保存的呢？

咱们知道抛出异常以后，ExceptionTranslationFilter对异常进行处理，检测到用户没有登陆，因此才跳转到authentication entry point，因此，猜测应该是这里保存了最开始的请求信息。

如下是ExceptionTranslationFilter的核心代码：

public void doFilter(ServletRequest req, ServletResponse res, FilterChain chain) throws IOException, ServletException {

this.handleSpringSecurityException(request, response, chain, (RuntimeException)ase);

}

private void handleSpringSecurityException(HttpServletRequest request, HttpServletResponse response, FilterChain chain, RuntimeException exception) throws IOException, ServletException {

if (exception instanceof AuthenticationException) {
        this.logger.debug("Authentication exception occurred; redirecting to authentication entry point", exception);
        this.sendStartAuthentication(request, response, chain, (AuthenticationException)exception);
    } else if (exception instanceof AccessDeniedException) {
        Authentication authentication = SecurityContextHolder.getContext().getAuthentication();
        if (!this.authenticationTrustResolver.isAnonymous(authentication) && !this.authenticationTrustResolver.isRememberMe(authentication)) {
            this.logger.debug("Access is denied (user is not anonymous); delegating to AccessDeniedHandler", exception);
            this.accessDeniedHandler.handle(request, response, (AccessDeniedException)exception);
        } else {
            this.logger.debug("Access is denied (user is " + (this.authenticationTrustResolver.isAnonymous(authentication) ? "anonymous" : "not fully authenticated") + "); redirecting to authentication entry point", exception);
            this.sendStartAuthentication(request, response, chain, new InsufficientAuthenticationException(this.messages.getMessage("ExceptionTranslationFilter.insufficientAuthentication", "Full authentication is required to access this resource")));
        }
    }

}

这里对异常的处理，其实，核心就只有两个方法：

1. `this.accessDeniedHandler.handle(request, response, (AccessDeniedException)exception);` ，这种状况下，用户已经登录了，可是权限不够，因此交给accessDeniedHandler进行处理，通常来说，若是没有进行特殊的配置，会返回一个403错误和异常信息【再也不跳转到authentication entry point，由于用户已经登录了】，这里不深究。

2. `this.sendStartAuthentication(request, response, chain, (AuthenticationException)exception);` ,这个方法核心代码以下：

protected void sendStartAuthentication(HttpServletRequest request, HttpServletResponse response, FilterChain chain, AuthenticationException reason) throws ServletException, IOException {

SecurityContextHolder.getContext().setAuthentication((Authentication)null);
       //就是在这里保存的此次请求的全部信息，包括请求头，请求路径，参数，cookie等详细信息。因此，后面跳转到/login端点时，我在controller里面能够拿出来。
       this.requestCache.saveRequest(request, response);
       this.logger.debug("Calling Authentication entry point.");
       //这里就是发起用户认证了，根据个人配置，它就会跳转到/login
       this.authenticationEntryPoint.commence(request, response, reason);
   }

再回到前面的controller登陆逻辑，往下走：

@GetMapping("/login")
public String loginJump(HttpSession session) {

final String SAVED_REQUEST = "SPRING_SECURITY_SAVED_REQUEST";
Object attribute = session.getAttribute(SAVED_REQUEST);
// 默认状况下，用户直接访问/login时，没有SAVED_REQUEST
if (attribute == null) {
    //默认跳转到登录页面
    return "login";
}
if (attribute instanceof DefaultSavedRequest) {
    DefaultSavedRequest savedRequest = (DefaultSavedRequest) attribute;
    List<String> referer = savedRequest.getHeaderValues("referer");
    if (referer.size() == 1) {
        //有referer请求头
        String domain = referer.get(0);
        //获取到数据库中配置的租户信息
        Tenant tenant = tenantService.selectByDomain(domain);
        if (tenant == null) {
            return "login";
        } else {
            String loginProvider = tenant.getLoginProvider();
            switch (loginProvider) {
                case "cas":
                    //获取cas地址
                    CasInfo casInfoByTenantId = casInfoService.getCasInfoByTenantId(tenant.getTenantId());
                    String casServerLogin = casInfoByTenantId.getCasServerLogin();
                    session.setAttribute("casInfoByTenantId",casInfoByTenantId);
                    return "redirect:" + casServerLogin;
                case "oauth":
                    //由于我在数据库中配置的是oauth，因此，最后响应login视图
                    return "login";
                default:
                    return "login";

            }
        }

    } else {
        return "login";
    }
}
return "login";

}

用户跳转到登录页面

![](http://ww1.sinaimg.cn/large/006edVQGgy1g280pr0ws7j30gq0bz3yn.jpg)

输入用户名密码，点击登录，进入`UsernamePasswordAuthenticationFilter` ，开始尝试认证用户

public Authentication attemptAuthentication(HttpServletRequest request,

HttpServletResponse response) throws AuthenticationException {
    if (postOnly && !request.getMethod().equals("POST")) {
        throw new AuthenticationServiceException(
                "Authentication method not supported: " + request.getMethod());
    }

    String username = obtainUsername(request);
    String password = obtainPassword(request);

    if (username == null) {
        username = "";
    }

    if (password == null) {
        password = "";
    }

    username = username.trim();

    UsernamePasswordAuthenticationToken authRequest = new UsernamePasswordAuthenticationToken(
            username, password);

    // Allow subclasses to set the "details" property
    setDetails(request, authRequest);

    return this.getAuthenticationManager().authenticate(authRequest);
}

最终会调用AuthenticationManager接口的authenticate方法，而`AuthenticationManager`委托一堆的AuthenticationProvider来进行认证。后面的流程，再也不赘述，不在本篇文章的讨论范畴。

用户认证成功后，调用`successfulAuthentication(request, response, chain, authResult);` 其实，这个方法里面核心代码就是`successHandler.onAuthenticationSuccess(request, response, authResult);`

AuthenticationSuccessHandler有不少实现类，咱们也能够自定义实现AuthenticationSuccessHandler。最经常使用的实现是，`SavedRequestAwareAuthenticationSuccessHandler` ，看一下它里面的核心代码：

@Override

public void onAuthenticationSuccess(HttpServletRequest request,
        HttpServletResponse response, Authentication authentication)
        throws ServletException, IOException {
    SavedRequest savedRequest = requestCache.getRequest(request, response);

    if (savedRequest == null) {
        super.onAuthenticationSuccess(request, response, authentication);

        return;
    }
    String targetUrlParameter = getTargetUrlParameter();
    if (isAlwaysUseDefaultTargetUrl()
            || (targetUrlParameter != null && StringUtils.hasText(request
                    .getParameter(targetUrlParameter)))) {
        requestCache.removeRequest(request, response);
        super.onAuthenticationSuccess(request, response, authentication);

        return;
    }

    clearAuthenticationAttributes(request);

    // Use the DefaultSavedRequest URL
    String targetUrl = savedRequest.getRedirectUrl();
    logger.debug("Redirecting to DefaultSavedRequest Url: " + targetUrl);
    getRedirectStrategy().sendRedirect(request, response, targetUrl);
}

其实，这个方法，就是获取到以前保存的请求信息，而后再重定向到以前的请求。

#### 2.CAS登陆流程分析

此次，咱们访问租户b，这个租户，配置了cas登陆。

访问租户b：<http://localhost:8085/> ，这个页面里，也就是一个超连接，点击超连接，访问

http://localhost:8083/oauth/authorize?client_id=iqiyi&response_type=token&redirect_uri=http://localhost:8081/iqiyi/qq/redirect

前面的流程仍是同样的，通过spring security的过滤器链，都没有匹配到，在最后DispatcherServlet抛出异常，而后ExceptionTranslationFilter对异常处理，跳转到/login端点，而后拿出配置在数据库中的casInfo，跳转到

https://localhost:8443/cas/login?service=http%3A%2F%2Flocalhost%3A8083%2Flogin%2Fcas

![](http://ww1.sinaimg.cn/large/006edVQGgy1g281gblfkgj311y0jvwjp.jpg)

输入用户名密码，cas成功认证用户以后，生成TGT

=============================================================
WHO: admin
WHAT: Supplied credentials: [admin]
ACTION: AUTHENTICATION_SUCCESS
APPLICATION: CAS
WHEN: Fri Apr 19 16:51:01 CST 2019
CLIENT IP ADDRESS: 0:0:0:0:0:0:0:1

SERVER IP ADDRESS: 0:0:0:0:0:0:0:1

2019-04-19 16:51:01,300 INFO [org.apereo.inspektr.audit.support.Slf4jLoggingAuditTrailManager] - <Audit trail record BEGIN

WHO: admin
WHAT: TGT-GHfz0lUJQE-8fkKJgyv8WXNE5FYLBqb7zfWGfNoKwDZ0AjqA-DESKTOP-GDU9JII
ACTION: TICKET_GRANTING_TICKET_CREATED
APPLICATION: CAS
WHEN: Fri Apr 19 16:51:01 CST 2019
CLIENT IP ADDRESS: 0:0:0:0:0:0:0:1

SERVER IP ADDRESS: 0:0:0:0:0:0:0:1

2019-04-19 16:51:01,307 INFO [org.apereo.cas.DefaultCentralAuthenticationService] - <Granted ticket [ST-35-Mf1v9Z2qVVVKlWeTgyc-Hlzh2xY-DESKTOP-GDU9JII] for service [http://localhost:8083/login/cas] and principal [admin]>

2019-04-19 16:51:01,308 INFO [org.apereo.inspektr.audit.support.Slf4jLoggingAuditTrailManager] - <Audit trail record BEGIN

WHO: admin
WHAT: ST-35-Mf1v9Z2qVVVKlWeTgyc-Hlzh2xY-DESKTOP-GDU9JII for http://localhost:8083/login/cas
ACTION: SERVICE_TICKET_CREATED
APPLICATION: CAS
WHEN: Fri Apr 19 16:51:01 CST 2019
CLIENT IP ADDRESS: 0:0:0:0:0:0:0:1

SERVER IP ADDRESS: 0:0:0:0:0:0:0:1

而后跳转到service地址，也就是

localhost:8083/login/cas ,并带上为这个service生成的service ticket，因此最后的请求地址为：

http://localhost:8083/login/cas?ticket=ST-35-Mf1v9Z2qVVVKlWeTgyc-Hlzh2xY-DESKTOP-GDU9JII

而这个端点`/login/cas`会被我配置的自定义CustomCasAuthenticationFilter拦截

![](http://ww1.sinaimg.cn/large/006edVQGgy1g281qb9jqnj311y0jvjwt.jpg)

@Override

public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException {
    HttpServletRequest req = (HttpServletRequest) request;
    HttpServletResponse res = (HttpServletResponse) response;
    if (!requiresAuthentication(req, res)) {
        chain.doFilter(request, response);
        return;
    }
    String ticket = obtainArtifact(req);
    //开始校验ticket
    try {
        CasInfo casInfo = (CasInfo) req.getSession().getAttribute("casInfoByTenantId");
        if (StringUtils.hasText(casInfo.getCasServer())) {
            //获取当前项目地址
            String service;
            int port = request.getServerPort();
            if (port != 80) {
                service = request.getScheme() + "://" + request.getServerName() + ":" + request.getServerPort() + endpoint;
            } else {
                service = request.getScheme() + "://" + request.getServerName() + endpoint;
            }
            //开始校验ticket
            Assertion validateResult = getTicketValidator(casInfo.getCasServer()).validate(ticket, service);
            //根据校验结果，获取用户详细信息
            UserDetails userDetails = null;
            try {
                userDetails = userDetailsService.loadUserByUsername(validateResult.getPrincipal().getName());
                if (this.logger.isDebugEnabled()) {
                    logger.debug("userDetailsServiceImpl is loading username:"+validateResult.getPrincipal().getName());
                }
            } catch (UsernameNotFoundException e) {
                unsuccessfulAuthentication(req, res, e);
            }
            //手动封装authentication对象
            assert userDetails != null;
            UsernamePasswordAuthenticationToken authentication = new UsernamePasswordAuthenticationToken(validateResult.getPrincipal(), ticket, userDetails.getAuthorities());
            authentication.setDetails(userDetails);
            successfulAuthentication(req,res,chain,authentication);


        } else {
            unsuccessfulAuthentication(req, res, new BadCredentialsException("bad credential:ticket校验失败"));
        }
    } catch (TicketValidationException e) {
        //ticket校验失败
        unsuccessfulAuthentication(req, res, new BadCredentialsException(e.getMessage()));
    }

// chain.doFilter(request, response);

校验成功以后，个人逻辑是，手动加载用户信息，而后把当前认证信息Authentication放到SecurityContextHolder中。

protected void successfulAuthentication(HttpServletRequest request, HttpServletResponse response, FilterChain chain, Authentication authResult) throws IOException, ServletException {

if (this.logger.isDebugEnabled()) {
        this.logger.debug("Authentication success. Updating SecurityContextHolder to contain: " + authResult);
    }

    SecurityContextHolder.getContext().setAuthentication(authResult);
    if (this.eventPublisher != null) {
        this.eventPublisher.publishEvent(new InteractiveAuthenticationSuccessEvent(authResult, this.getClass()));
    }

    this.successHandler.onAuthenticationSuccess(request, response, authResult);
}

protected void unsuccessfulAuthentication(HttpServletRequest request, HttpServletResponse response, AuthenticationException failed) throws IOException, ServletException {
    SecurityContextHolder.clearContext();
    if (this.logger.isDebugEnabled()) {
        this.logger.debug("Authentication request failed: " + failed.toString(), failed);
        this.logger.debug("Updated SecurityContextHolder to contain null Authentication");
        this.logger.debug("Delegating to authentication failure handler " + this.failureHandler);
    }

    this.failureHandler.onAuthenticationFailure(request, response, failed);
}

#### 3.单点登出流程分析

用户发送`/logout`请求，被我自定义的`CustomLogoutFilter`拦截

![](http://ww1.sinaimg.cn/large/006edVQGgy1g281vaf77xj311y0jv0y7.jpg)

以后的逻辑是，先从本地登出，而后判断以前是不是从cas认证的，若是是，再获取cas信息，而后把cas也登出了。这里判断登录用户的认证方式，我想了好久，最后的实现思路以下：

以前经过cas登陆时，我手动的添加登录用户的认证方式到Authentication中。代码以下：

//根据校验结果，获取用户详细信息
UserDetails userDetails = null;
try {

userDetails = userDetailsService.loadUserByUsername(validateResult.getPrincipal().getName());
if (this.logger.isDebugEnabled()) {
    logger.debug("userDetailsServiceImpl is loading username:"+validateResult.getPrincipal().getName());
}

} catch (UsernameNotFoundException e) {

unsuccessfulAuthentication(req, res, e);

}

//手动封装authentication对象
assert userDetails != null;
UsernamePasswordAuthenticationToken authentication = new UsernamePasswordAuthenticationToken(validateResult.getPrincipal(), ticket, userDetails.getAuthorities());

//就是这里作了文章
authentication.setDetails(userDetails);
successfulAuthentication(req,res,chain,authentication);

而后，登出时，拿到这个信息，进行登出操做。由于，我在userdetails中封装了这个信息，因此能够拿到。

public class UserDetailsVO implements UserDetails {

//user
private Integer userId;

private String username;

private String phone;

private String email;

//tenant
private Tenant tenant;

//account
private Integer accountId;

private String password;
//省略setter和getter

}