springboot前后端分离接入cas技术方案及实现（二）

1.在pom.xml中增加sso接入相关依赖

<!--cas-client-->
        <dependency>
            <groupId>org.jasig.cas.client</groupId>
            <artifactId>cas-client-core</artifactId>
            <version>3.4.1</version>
        </dependency>

        <dependency>
            <groupId>org.apache.shiro</groupId>
            <artifactId>shiro-core</artifactId>
            <version>${shiro.version}</version>
        </dependency>

        <dependency>
            <groupId>org.apache.shiro</groupId>
            <artifactId>shiro-cas</artifactId>
            <version>${shiro.version}</version>
        </dependency>

        <dependency>
            <groupId>org.apache.shiro</groupId>
            <artifactId>shiro-aspectj</artifactId>
            <version>${shiro.version}</version>
        </dependency>

        <!--单点登录-->
        <dependency>
            <groupId>org.pac4j</groupId>
            <artifactId>pac4j-cas</artifactId>
            <version>3.0.2</version>
        </dependency>
        <dependency>
            <groupId>io.buji</groupId>
            <artifactId>buji-pac4j</artifactId>
            <version>4.0.0</version>
            <exclusions>
                <exclusion>
                    <artifactId>shiro-web</artifactId>
                    <groupId>org.apache.shiro</groupId>
                </exclusion>
            </exclusions>
        </dependency>

 

2. 在springboot项目的配置文件application-dev.xml新增以下配置项：

#cas配置
cas:
  client-name: kb
  server:
    #cas服务端前缀，不是登录地
    url: http://127.0.0.1:8085/cas
  project:
    #当前客户端地址，即应用地址(域名）
    url: http://127.0.0.1:8088/kg
    #前端首页地址，用于sso验证成功后重定向到此页面(注意不是登陆页面，是登陆成功后的首页)
    ui-url: http://127.0.0.1:11000/admin/#/home

 3.重写ShiroConfig.java文件：

 

import io.buji.pac4j.filter.CallbackFilter;
import io.buji.pac4j.filter.LogoutFilter;
import io.buji.pac4j.filter.SecurityFilter;
import io.buji.pac4j.subject.Pac4jSubjectFactory;
import org.apache.shiro.spring.LifecycleBeanPostProcessor;
import org.apache.shiro.spring.security.interceptor.AuthorizationAttributeSourceAdvisor;
import org.apache.shiro.spring.web.ShiroFilterFactoryBean;
import org.apache.shiro.web.mgt.DefaultWebSecurityManager;
import org.jasig.cas.client.session.SingleSignOutFilter;
import org.jasig.cas.client.session.SingleSignOutHttpSessionListener;
import org.pac4j.core.config.Config;
import org.springframework.aop.framework.autoproxy.DefaultAdvisorAutoProxyCreator;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.boot.web.servlet.FilterRegistrationBean;
import org.springframework.boot.web.servlet.ServletListenerRegistrationBean;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.DependsOn;
import org.springframework.core.Ordered;
import org.springframework.core.annotation.Order;
import org.springframework.web.filter.DelegatingFilterProxy;

import javax.servlet.DispatcherType;
import javax.servlet.Filter;
import java.util.HashMap;
import java.util.LinkedHashMap;
import java.util.Map;

/**
 * cas整合shiro
 * @author jay
 * @date 2019-12-20
 *
 */
@Configuration
public class CasShiroConfig {


    /**
     * 项目工程路径
     */
    @Value("${cas.project.url}")
    private String projectUrl;

    /**
     * 项目cas服务路径
     */
    @Value("${cas.server.url}")
    private String casServerUrl;

    /**
     * 客户端名称
     */
    @Value("${cas.client-name}")
    private String clientName;




    /**
     * 单点登出的listener
     *
     * @return
     */
    @SuppressWarnings({"rawtypes", "unchecked"})
    @Bean
    public ServletListenerRegistrationBean<?> singleSignOutHttpSessionListener() {
        ServletListenerRegistrationBean bean = new ServletListenerRegistrationBean();
        bean.setListener(new SingleSignOutHttpSessionListener());
        bean.setEnabled(true);
        return bean;
    }

    /**
     * 单点登出filter
     *
     * @return
     */
    @Bean
    @Order(Ordered.HIGHEST_PRECEDENCE)
    public FilterRegistrationBean singleSignOutFilter() {
        FilterRegistrationBean bean = new FilterRegistrationBean();
        bean.setName("singleSignOutFilter");
        SingleSignOutFilter singleSignOutFilter = new SingleSignOutFilter();
        singleSignOutFilter.setCasServerUrlPrefix(casServerUrl);
        singleSignOutFilter.setIgnoreInitConfiguration(true);
        bean.setFilter(singleSignOutFilter);
        bean.addUrlPatterns("/*");
        bean.setEnabled(true);
        return bean;
    }


    @Bean("securityManager")
    public DefaultWebSecurityManager securityManager(Pac4jSubjectFactory subjectFactory, CasRealm casRealm) {
        DefaultWebSecurityManager manager = new DefaultWebSecurityManager();
        manager.setRealm(casRealm);
        manager.setSubjectFactory(subjectFactory);
//        manager.setSessionManager(sessionManager);	//去掉session管理
        return manager;
    }

    @Bean
    public CasRealm casRealm() {
        CasRealm realm = new CasRealm();
        // 使用自定义的realm
        realm.setClientName(clientName);
        realm.setCachingEnabled(false);
        //暂时不使用缓存
        realm.setAuthenticationCachingEnabled(false);
        realm.setAuthorizationCachingEnabled(false);
        //realm.setAuthenticationCacheName("authenticationCache");
        //realm.setAuthorizationCacheName("authorizationCache");
        return realm;
    }

    /**
     * 使用 pac4j 的 subjectFactory
     *
     * @return
     */
    @Bean
    public Pac4jSubjectFactory subjectFactory() {
        return new Pac4jSubjectFactory();
    }

    @Bean
    public FilterRegistrationBean filterRegistrationBean() {
        FilterRegistrationBean filterRegistration = new FilterRegistrationBean();
        filterRegistration.setFilter(new DelegatingFilterProxy("shiroFilter"));
        //  该值缺省为false,表示生命周期由SpringApplicationContext管理,设置为true则表示由ServletContainer管理
        filterRegistration.addInitParameter("targetFilterLifecycle", "true");
        filterRegistration.setEnabled(true);
        filterRegistration.addUrlPatterns("/*");
        filterRegistration.setDispatcherTypes(DispatcherType.REQUEST, DispatcherType.FORWARD);
        return filterRegistration;
    }

    /**
     * 加载shiroFilter权限控制规则（从数据库读取然后配置）
     *
     * @param shiroFilterFactoryBean
     */
    private void loadShiroFilterChain(ShiroFilterFactoryBean shiroFilterFactoryBean) {
        /*下面这些规则配置最好配置到配置文件中 */
        Map<String, String> filterChainDefinitionMap = new LinkedHashMap<>();
        filterChainDefinitionMap.put("/kg/", "securityFilter");
        filterChainDefinitionMap.put("/kg/ssoLogin", "securityFilter");
        filterChainDefinitionMap.put("/kg/index", "securityFilter");
        filterChainDefinitionMap.put("/kg/callback/**", "callbackFilter");
        //filterChainDefinitionMap.put("kg/logout", "logout");
        filterChainDefinitionMap.put("kg/ssoLogout", "ssoLogoutFilter");
//        filterChainDefinitionMap.put("/**","anon");
        filterChainDefinitionMap.put("/**", "jwt");    //使用自己的过滤器
        // filterChainDefinitionMap.put("/user/edit/**", "authc,perms[user:edit]");
        shiroFilterFactoryBean.setFilterChainDefinitionMap(filterChainDefinitionMap);
    }


    /**
     * shiroFilter
     *
     * @param securityManager
     * @param config
     * @return
     */
    @Bean("shiroFilter")
    public ShiroFilterFactoryBean factory(DefaultWebSecurityManager securityManager, Config config) {
        ShiroFilterFactoryBean shiroFilterFactoryBean = new ShiroFilterFactoryBean();
        // 必须设置 SecurityManager
        shiroFilterFactoryBean.setSecurityManager(securityManager);
        //shiroFilterFactoryBean.setUnauthorizedUrl("/403");
        // 添加casFilter到shiroFilter中
        loadShiroFilterChain(shiroFilterFactoryBean);
        Map<String, Filter> filters = new HashMap<>(4);
        //cas 资源认证拦截器
        SecurityFilter securityFilter = new SecurityFilter();
        securityFilter.setConfig(config);
        securityFilter.setClients(clientName);
        filters.put("securityFilter", securityFilter);
        //cas 认证后回调拦截器
        CallbackFilter callbackFilter = new CallbackFilter();
        callbackFilter.setConfig(config);
        callbackFilter.setDefaultUrl(projectUrl);
        filters.put("callbackFilter", callbackFilter);

        //验证请求拦截器
        filters.put("jwt", new JWTFilter());    //添加自己的过滤器
        // 注销 拦截器
        LogoutFilter logoutFilter = new LogoutFilter();
        logoutFilter.setConfig(config);
        logoutFilter.setCentralLogout(true);
        logoutFilter.setLocalLogout(true);
        logoutFilter.setDefaultUrl(projectUrl + "/callback?client_name=" + clientName);
        filters.put("ssoLogoutFilter", logoutFilter);
        shiroFilterFactoryBean.setFilters(filters);
        return shiroFilterFactoryBean;
    }


    /**
     * 下面的代码是添加注解支持
     */
    @Bean
    @DependsOn("lifecycleBeanPostProcessor")
    public DefaultAdvisorAutoProxyCreator defaultAdvisorAutoProxyCreator() {
        DefaultAdvisorAutoProxyCreator defaultAdvisorAutoProxyCreator = new DefaultAdvisorAutoProxyCreator();
        // 强制使用cglib，防止重复代理和可能引起代理出错的问题
        // https://zhuanlan.zhihu.com/p/29161098
        defaultAdvisorAutoProxyCreator.setProxyTargetClass(true);
        return defaultAdvisorAutoProxyCreator;
    }

    @Bean
    public static LifecycleBeanPostProcessor lifecycleBeanPostProcessor() {
        return new LifecycleBeanPostProcessor();
    }

    @Bean
    public AuthorizationAttributeSourceAdvisor authorizationAttributeSourceAdvisor(DefaultWebSecurityManager securityManager) {
        AuthorizationAttributeSourceAdvisor advisor = new AuthorizationAttributeSourceAdvisor();
        advisor.setSecurityManager(securityManager);
        return advisor;
    }


}

  4.重写ShiroRealm.java文件

   注意点：这里有个大坑，一定要注意重写supports方法增加对token类型的支持，不然会报类型不支持的错，导致后续所有权限验证失败，这个错折腾了最少三天才解决！！！

 

 

import io.buji.pac4j.realm.Pac4jRealm;
import io.buji.pac4j.subject.Pac4jPrincipal;
import io.buji.pac4j.token.Pac4jToken;
import org.apache.commons.lang3.StringUtils;
import org.apache.shiro.authc.AuthenticationException;
import org.apache.shiro.authc.AuthenticationInfo;
import org.apache.shiro.authc.AuthenticationToken;
import org.apache.shiro.authc.SimpleAuthenticationInfo;
import org.apache.shiro.authz.AuthorizationInfo;
import org.apache.shiro.authz.SimpleAuthorizationInfo;
import org.apache.shiro.subject.PrincipalCollection;
import org.apache.shiro.subject.SimplePrincipalCollection;
import org.pac4j.core.profile.CommonProfile;
import org.springframework.beans.factory.annotation.Autowired;

import javax.servlet.http.HttpServletRequest;
import java.util.List;
import java.util.Set;

/**
 * cas认证与授权
 * @author jay
 * @date 2019-12-20
 **/
public class CasRealm extends Pac4jRealm {

    private String clientName;

    public String getClientName() {
        return clientName;
    }

    public void setClientName(String clientName) {
        this.clientName = clientName;
    }

    @Autowired
    private UserManager userManager;
    @Autowired
    private RedisService redisService;


    /**
     * 认证
     * @param authenticationToken
     * @return
     * @throws AuthenticationException
     */
    @Override
    protected AuthenticationInfo doGetAuthenticationInfo(AuthenticationToken authenticationToken)  {
        if (!(authenticationToken instanceof JWTToken)) {
            final Pac4jToken pac4jToken = (Pac4jToken) authenticationToken;
            final List<CommonProfile> commonProfileList = pac4jToken.getProfiles();
            final CommonProfile commonProfile = commonProfileList.get(0);
            System.out.println("单点登录返回的信息" + commonProfile.toString());
            //todo
            final Pac4jPrincipal principal = new Pac4jPrincipal(commonProfileList, getPrincipalNameAttribute());
            final PrincipalCollection principalCollection = new SimplePrincipalCollection(principal, getName());
            return new SimpleAuthenticationInfo(principalCollection, commonProfileList.hashCode());
            //return new SimpleAuthenticationInfo(t, t, "kb_shiro_realm");

        } else {
            // 这里的 token是从 JWTFilter 的 executeLogin 方法传递过来的，已经经过了解密
//            System.out.println(authenticationToken.getCredentials());
            String token = (String)authenticationToken.getCredentials();
            // 从 redis里获取这个 token
            HttpServletRequest request = HttpContextUtil.getHttpServletRequest();
            String ip = IPUtil.getIpAddr(request);

            String encryptToken = KBUtil.encryptToken(token);
            String encryptTokenInRedis = null;
            try {
                encryptTokenInRedis = redisService.get(KBConstant.TOKEN_CACHE_PREFIX + encryptToken + "." + ip);
            } catch (Exception ignore) {
            }

            // 如果找不到，说明已经失效
            if (StringUtils.isBlank(encryptTokenInRedis))
                throw new AuthenticationException("token已经过期");

            String username = JWTUtil.getUsername(token);

            if (StringUtils.isBlank(username))
                throw new AuthenticationException("token校验不通过");

            // 通过用户名查询用户信息
            User user = userManager.getUser(username);

            if (user == null)
                throw new AuthenticationException("用户名或密码错误");
            if (!JWTUtil.verify(token, username, user.getPassword()))
                throw new AuthenticationException("token校验不通过");
            return new SimpleAuthenticationInfo(token, token, "kb_shiro_realm");
        }
    }


    /**
     * 授权/验权（todo 后续有权限在此增加）
     * @param principals
     * @return
     */
    @Override
    protected AuthorizationInfo doGetAuthorizationInfo(PrincipalCollection token) {

        String username = JWTUtil.getUsername(token.toString());

        SimpleAuthorizationInfo simpleAuthorizationInfo = new SimpleAuthorizationInfo();

        // 获取用户角色集
        Set<String> roleSet = userManager.getUserRoles(username);
        simpleAuthorizationInfo.setRoles(roleSet);

        // 获取用户权限集
        Set<String> permissionSet = userManager.getUserPermissions(username);
        simpleAuthorizationInfo.setStringPermissions(permissionSet);
        return simpleAuthorizationInfo;
    }

    /**
     * @author jay
     * 需要重写 AuthorizingRealm（被Pac4jRealm继承）的supports方法，增加对JWTToken的支持
     * 否则会报错：does not support authentication token
     * @param token
     * @return
     */
    @Override
    public boolean supports(AuthenticationToken token) {

        Boolean flag = false;
        if (super.supports(token) ||  token instanceof Pac4jToken || token instanceof JWTToken ) {
            flag = true;
        }
        return flag;
    }

}

  5.增加 CasClient.java类

package com.upai.kb.common.authentication;

import org.pac4j.cas.config.CasConfiguration;
import org.pac4j.core.context.Pac4jConstants;
import org.pac4j.core.context.WebContext;
import org.pac4j.core.context.session.SessionStore;
import org.pac4j.core.redirect.RedirectAction;
import org.pac4j.core.util.CommonHelper;

/**
 * cas客户端
 * @author jay
 * @date 2019-12-20
 *
 */
public class CasClient extends org.pac4j.cas.client.CasClient {
    public CasClient() {
        super();
    }

    public CasClient(CasConfiguration configuration) {
        super(configuration);
    }

    /*
     * (non-Javadoc)
     * @see org.pac4j.core.client.IndirectClient#getRedirectAction(org.pac4j.core.context.WebContext)
     */

    @Override
    public RedirectAction getRedirectAction(WebContext context) {
        this.init();
        if (getAjaxRequestResolver().isAjax(context)) {
            this.logger.info("AJAX request detected -> returning the appropriate action");
            RedirectAction action = getRedirectActionBuilder().redirect(context);
            this.cleanRequestedUrl(context);
            return getAjaxRequestResolver().buildAjaxResponse(action.getLocation(), context);
        } else {
            final String attemptedAuth = (String)context.getSessionStore().get(context, this.getName() + ATTEMPTED_AUTHENTICATION_SUFFIX);
            if (CommonHelper.isNotBlank(attemptedAuth)) {
                this.cleanAttemptedAuthentication(context);
                this.cleanRequestedUrl(context);
                //这里按自己需求处理，默认是返回了401，我在这边改为跳转到cas登录页面
                //throw HttpAction.unauthorized(context);
                return this.getRedirectActionBuilder().redirect(context);
            } else {
                return this.getRedirectActionBuilder().redirect(context);
            }
        }
    }

    private void cleanRequestedUrl(WebContext context) {
        SessionStore<WebContext> sessionStore = context.getSessionStore();
        if (sessionStore.get(context, Pac4jConstants.REQUESTED_URL) != null) {
            sessionStore.set(context, Pac4jConstants.REQUESTED_URL, "");
        }

    }

    private void cleanAttemptedAuthentication(WebContext context) {
        SessionStore<WebContext> sessionStore = context.getSessionStore();
        if (sessionStore.get(context, this.getName() + ATTEMPTED_AUTHENTICATION_SUFFIX) != null) {
            sessionStore.set(context, this.getName() + ATTEMPTED_AUTHENTICATION_SUFFIX, "");
        }

    }


}

6.增加Pac4jConfig.java类，Pac4j主要做跳转用，跳转地址都在这个类里面配置

import edu.yale.its.tp.cas.util.SecureHash64Util;
import io.buji.pac4j.context.ShiroSessionStore;
import org.pac4j.cas.config.CasConfiguration;
import org.pac4j.cas.config.CasProtocol;
import org.pac4j.core.config.Config;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

import java.io.IOException;

/**
 * cas跳转
 * @author jay
 * @date 2019-12-20
 *
 */
@Configuration
public class Pac4jConfig {

    /**
     * 地址为：cas地址
     */
    @Value("${cas.server.url}")
    private String casServerUrl;

    /**
     * 地址为：验证返回后的项目地址：http://localhost:8081
     */
    @Value("${cas.project.url}")
    private String projectUrl;

    /**
     * 相当于一个标志，可以随意
     */
    @Value("${cas.client-name}")
    private String clientName;

    @Value("${cas.sysIdStr}")
    private String sysIdStr;


    /**
     * pac4j配置
     *
     * @param casClient
     * @param shiroSessionStore
     * @return
     */
    @Bean("authcConfig")
    public Config config(CasClient casClient, ShiroSessionStore shiroSessionStore) {
        Config config = new Config(casClient);
        config.setSessionStore(shiroSessionStore);
        return config;
    }

    /**
     * 自定义存储
     *
     * @return
     */
    @Bean
    public ShiroSessionStore shiroSessionStore() {
        return new ShiroSessionStore();
    }

    /**
     * cas 客户端配置
     *
     * @param casConfig
     * @return
     */
    @Bean
    public CasClient casClient(CasConfiguration casConfig) {
        CasClient casClient = new CasClient(casConfig);
        //客户端回调地址, 登陆成功后会拦截这个地址
        casClient.setCallbackUrl(projectUrl + "/callback");
        casClient.setName(clientName);
        return casClient;
    }

    /**
     * 请求cas服务端配置
     *
     * @param
     */
    @Bean
    public CasConfiguration casConfig() throws IOException {
        final CasConfiguration configuration = new CasConfiguration();
        String serviceEncrypted = SecureHash64Util.obfusecate(projectUrl + "/callback?client_name="+clientName);
        //CAS server登录地址，这里增加了几个参数是因为针对公司sso客户端的需要，可以不加
        configuration.setLoginUrl(casServerUrl + "/login?" +
                "sysIdStr=" + sysIdStr +
                "&flag=" + serviceEncrypted
        );
        //CAS 版本，默认为 CAS30，我们使用的是 CAS20
        configuration.setProtocol(CasProtocol.CAS20);
        configuration.setAcceptAnyProxy(true);
        configuration.setPrefixUrl(casServerUrl + "/");
        return configuration;
    }

}

7.增加LoginController.java中的登录成功回调方法，用于重定向到前端首页

 说明：本项目只是简单接入sso，通过sso登录，并没有使用ticket作为权限验证凭据，而是获取sso登陆成功后的用户名再根据用户名去获取菜单角色等权限信息，沿用了项目本身的验证，可以根据项目需要来更改ticket验证方式!

sso登录成功后后台拿到登录用户，经过aes对称加密一起返回给前端，前端再调接口获取需要的权限角色等信息完成登录，

博主这个没有一次把所有信息返回给前端，是因为参数太多，都拼接再地址后面感觉不好，就只传递了一个加密后的用户名，如果有更好的方法可以留言交流一下。

 

 

/**
     * cas登录认证
     *
     * @return 登录结果
     * @author jay
     * @date 2019-12-20
     */
    @ApiOperation(value = "sso登录接口", notes = "sso登录接口")
    @GetMapping({"/", "/ssoLogin", "/index"})
    public void login(HttpServletRequest request, HttpServletResponse response) {
        try {
            Pac4jPrincipal principal = (Pac4jPrincipal) request.getUserPrincipal();
            String userStr = (String) principal.getProfile().getId();
            String loginAccount = userStr.split(":")[0];
            //aes 16位加密，防止恶意登录
            loginAccount = AESUtils.encrypt(loginAccount);
            logger.info("---sso返回参数---Pac4jPrincipal：" + principal
                    + ";userStr:" + userStr
                    + ";loginAccount："+loginAccount
            );
              /*重定向到前端登录页面，考虑到安全问题，只传给前端登陆账户，前端再调接口获取登录所需数据
              http://前端服务器地址:前端项目端口（前端部署到nginx后nginx配置端口）
              + "/"（注意/是前端路由中登录页面的path，并且与nginx.conf文件中的
              location后的/一致）+ 返回给前端的数据。
              注意：前端服务器地址与前端项目中
              config/index.js配置的host: 'x.x.x.x',保持一致*/
            //参数暂定在重定向时传过去，缺点是会显得url太长，后续考虑只传用户id过去，再根据id查询需要的参数
            String serviceEncrypted = SecureHash64Util.obfusecate(projectUrl + "/callback");
            /*String url = casServerUrl + "/login?" +
                    "service=" + projectUrl + "/callback" +
                    "&sysIdStr=" + sysIdStr +
                    "&flag=" + serviceEncrypted;*/
            String url = casUIUrl + "?loginAccount="+loginAccount;
            response.sendRedirect(url);
        } catch (Exception e) {
            System.out.println("登录失败,请联系管理员！");
            e.printStackTrace();
        }

    }

 
8.源码

等后续有空会把源码上传到github上发出来。