jeesite整合单点登录

1.什么是单点登录

单点登录SSO（Single Sign On）实际上就是用户在一个系统登录之后，在单点登录的其他客户端（应用）不用重复的登陆，登陆校验交给中央认证服务器去校验。单点登录的应用场景通常为一个大型的系统下有很多小系统，并且这些系统使用的是同一套认证体系。

常用的单点登录框架为cas,cas分为cas-server,cas-client.

2.使用jeesite实现单点登录的配置

看过jeesite的应该知道，jeesite使用的是shiro整合spring的方式，并且自定义实现了多种SessionManager和多种cacheManager,。由于单点登录的特殊性，需要我们自定义realm，realm可以看做是一个安全数据源，用来收集用户的认证信息和授权信息。

2.1单点登录的配置文件

2.1.1 loginUrl配置的为单点登录认证服务器的地址和service回调地址

2.1.2  需要单独配置logoutFilter，用于到认证服务器进行单点退出。

2.1.3 配置casFilter用于接收认证服务器验证之后的信息。并进行认证授权的处理

2.1.4自定义relam,在SystemAuthorizingRealm基础上进行改造。

2.1.5单点登录的配置文件:

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:context="http://www.springframework.org/schema/context"
	xsi:schemaLocation="
		http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.0.xsd
		http://www.springframework.org/schema/context  http://www.springframework.org/schema/context/spring-context-4.0.xsd"
	default-lazy-init="true">

	<description>Shiro Configuration</description>

	<!-- 加载配置属性文件 -->
	<context:property-placeholder
		ignore-unresolvable="true" location="classpath:app.properties" />

	<!-- Shiro权限过滤过滤器定义 -->
	<bean name="shiroFilterChainDefinitions" class="java.lang.String">
		<constructor-arg>
			<value>
				/static/** = anon
				/userfiles/** = anon
				${adminPath}/cas = cas
				<!-- ${adminPath}/login = authc -->
				${adminPath}/logout = logout
				${adminPath}/** = user
				/act/rest/service/editor/** = perms[act:model:edit]
				/act/rest/service/model/** = perms[act:model:edit]
				/act/rest/service/** = user
				/ReportServer/** = user
			</value>
		</constructor-arg>
	</bean>

	


	<!-- 安全认证过滤器 -->

	<bean id="shiroFilter" class="org.apache.shiro.spring.web.ShiroFilterFactoryBean">
		<property name="securityManager" ref="securityManager" />
		<property name="loginUrl" value="${cas.server.url}/login?service=${cas.project.url}${adminPath}/cas" 
			/>
		<!-- <property name="loginUrl" value="${adminPath}/login" /> -->
		<property name="successUrl" value="${adminPath}/index?login" />
		<property name="filters">
			<map>
				<entry key="cas" value-ref="casFilter" />
				<entry key="logout">
					<bean class="org.apache.shiro.web.filter.authc.LogoutFilter">
						<property name="redirectUrl" value="${cas.server.url}/logout?service=${cas.project.url}${frontPath}"></property>
					</bean>
				</entry>
				<!-- <entry key="authc" value-ref="formAuthenticationFilter" /> -->
			</map>
		</property>
		<property name="filterChainDefinitions">
			<ref bean="shiroFilterChainDefinitions" />
		</property>
	</bean>
	<!-- CAS认证过滤器 -->
	<bean id="casFilter" class="org.apache.shiro.cas.CasFilter">
		<property name="failureUrl" value="${frontPath}/login" />
	</bean>

	<!-- 定义Shiro安全管理配置 -->
	<bean id="securityManager" class="org.apache.shiro.web.mgt.DefaultWebSecurityManager">
		<property name="realm" ref="casAuthorizingRealm" />
		<property name="sessionManager" ref="sessionManager" />
		<property name="cacheManager" ref="shiroCacheManager" />
	</bean>
	
	
	<bean id="casAuthorizingRealm" class="com.aligns.administrator.sys.security.CasAuthorizingRealm">
	  	<property name="casServerUrlPrefix" value="${cas.server.url}" />
        <property name="casService" value="${cas.project.url}${adminPath}/cas" />
	</bean>

	<!-- 自定义会话管理配置 -->
	<bean id="sessionManager"
		class="com.aligns.plat.core.security.shiro.session.SessionManager">
		<property name="sessionDAO" ref="sessionDAO" />

		<!-- 会话超时时间，单位：毫秒 -->
		<property name="globalSessionTimeout" value="${session.sessionTimeout}" />

		<!-- 定时清理失效会话, 清理用户直接关闭浏览器造成的孤立会话 -->
		<property name="sessionValidationInterval" value="${session.sessionTimeoutClean}" />
		<!-- <property name="sessionValidationSchedulerEnabled" value="false"/> -->
		<property name="sessionValidationSchedulerEnabled" value="true" />

		<property name="sessionIdCookie" ref="sessionIdCookie" />
		<property name="sessionIdCookieEnabled" value="true" />
	</bean>

	<!-- 指定本系统SESSIONID, 默认为: JSESSIONID 问题: 与SERVLET容器名冲突, 如JETTY, TOMCAT 等默认JSESSIONID, 
		当跳出SHIRO SERVLET时如ERROR-PAGE容器会为JSESSIONID重新分配值导致登录会话丢失! -->
	<bean id="sessionIdCookie" class="org.apache.shiro.web.servlet.SimpleCookie">
		<constructor-arg name="name" value="jeesite.session.id" />
	</bean>

	<!-- 自定义Session存储容器 -->
<!-- 	<bean id="sessionDAO" class="com.thinkgem.jeesite.common.security.shiro.session.JedisSessionDAO">
		<property name="sessionIdGenerator" ref="idGen" />
		<property name="sessionKeyPrefix" value="${redis.keyPrefix}_session_" />
	</bean> -->
	
	<bean id="sessionDAO"
		class="com.aligns.plat.core.security.shiro.session.CacheSessionDAO">
		<property name="sessionIdGenerator" ref="idGen" />
		<property name="activeSessionsCacheName" value="activeSessionsCache" />
		<property name="cacheManager" ref="jedisCacheManager" />
	</bean>
	 
	 
	 
	 <!-- 
	 <bean id="jedisUtils" class="com.aligns.plat.utils.JedisUtils"></bean>
	 -->
	 <!-- 如果需要集群配置，则将SessionDao设置为jedis -->
	 
<!-- 	<bean id="sessionDAO"
		class="com.aligns.plat.core.security.shiro.session.JedisSessionDAO" >
		<property name="sessionIdGenerator" ref="idGen" />
		<property name="activeSessionsCacheName" value="activeSessionsCache" />
		<property name="cacheManager" ref="jedisCacheManager" />
		
	</bean> -->
	
	
	
	
	
	

	<!-- 定义授权缓存管理器 -->
	<!-- <bean id="shiroCacheManager" class="com.aligns.plat.core.common.security.shiro.cache.SessionCacheManager" 
		/> -->
	<bean id="shiroCacheManager" class="org.apache.shiro.cache.ehcache.EhCacheManager">
		<property name="cacheManager" ref="cacheManager" />
	</bean>
	
	
	<bean id="jedisCacheManager" class="com.aligns.plat.core.security.shiro.cache.JedisCacheManager">
		
	</bean>

	<!-- 保证实现了Shiro内部lifecycle函数的bean执行 -->
	<bean id="lifecycleBeanPostProcessor" class="org.apache.shiro.spring.LifecycleBeanPostProcessor" />

	<!-- AOP式方法级权限检查 -->
	<bean
		class="org.springframework.aop.framework.autoproxy.DefaultAdvisorAutoProxyCreator"
		depends-on="lifecycleBeanPostProcessor">
		<property name="proxyTargetClass" value="true" />
	</bean>
	<bean
		class="org.apache.shiro.spring.security.interceptor.AuthorizationAttributeSourceAdvisor">
		<property name="securityManager" ref="securityManager" />
	</bean>

</beans>

2.1.6单点登录的自定义relam(CasAuthorizingRealm)

/**
 * 
 */
package com.aligns.administrator.sys.security;

import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
import java.util.Map;

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.cas.CasAuthenticationException;
import org.apache.shiro.cas.CasRealm;
import org.apache.shiro.cas.CasToken;
import org.apache.shiro.subject.PrincipalCollection;
import org.apache.shiro.subject.SimplePrincipalCollection;
import org.apache.shiro.util.CollectionUtils;
import org.apache.shiro.util.StringUtils;
import org.jasig.cas.client.authentication.AttributePrincipal;
import org.jasig.cas.client.validation.Assertion;
import org.jasig.cas.client.validation.TicketValidationException;
import org.jasig.cas.client.validation.TicketValidator;

import com.aligns.administrator.sys.entity.Menu;
import com.aligns.administrator.sys.entity.Role;
import com.aligns.administrator.sys.entity.User;
import com.aligns.administrator.sys.security.SystemAuthorizingRealm.Principal;
import com.aligns.administrator.sys.service.SystemService;
import com.aligns.administrator.sys.utils.LogUtils;
import com.aligns.administrator.sys.utils.UserUtils;
import com.aligns.plat.core.Servlets;
import com.aligns.plat.utils.SpringContextHolder;

/**
 * 系统安全认证单点登录实现类
 * 
 * @author kefan
 * @version 2014-7-5
 */
//@Service
// @DependsOn({"userDao","roleDao","menuDao"})
public class CasAuthorizingRealm extends CasRealm {
	private SystemService systemService;
	 
    public CasAuthorizingRealm() {  
        super();  
    }

    /**
     * 认证
     * */
    protected AuthenticationInfo doGetAuthenticationInfo(AuthenticationToken token) throws AuthenticationException {  
        CasToken casToken = (CasToken) token;  
        if (token == null)  
            return null;  
        String ticket = (String) casToken.getCredentials();  
        if (!StringUtils.hasText(ticket))  
            return null;  
        TicketValidator ticketValidator = ensureTicketValidator();  
        try {  
            Assertion casAssertion = ticketValidator.validate(ticket, getCasService());  
            //casPrincipal  认证后的用户信息
            AttributePrincipal casPrincipal = casAssertion.getPrincipal();  
            String userId = casPrincipal.getName();  
            
            //获取用户
            User user = getSystemService().getUserByLoginName(userId);
            
            Map<String,Object> attributes = casPrincipal.getAttributes();  
            casToken.setUserId(userId);  
            String rememberMeAttributeName = getRememberMeAttributeName();  
            String rememberMeStringValue = (String) attributes.get(rememberMeAttributeName);  
            boolean isRemembered = rememberMeStringValue != null && Boolean.parseBoolean(rememberMeStringValue);  
            if (isRemembered)  
                casToken.setRememberMe(true);  
            // 这里可以拿到Cas的登录账号信息,加载到对应权限体系信息放到缓存中...  
            return new SimpleAuthenticationInfo(new Principal(user, false), ticket,getName());  
        } catch (TicketValidationException e) {  
            throw new CasAuthenticationException((new StringBuilder()).append("Unable to validate ticket [")  
                    .append(ticket).append("]").toString(), e);  
        }  
    }  
    
    /**
     * 授权
     * */
    protected AuthorizationInfo doGetAuthorizationInfo(PrincipalCollection principals) {
    	Principal principal = (Principal) getAvailablePrincipal(principals);
		
		
    	User user = getSystemService().getUserByLoginName(principal.getLoginName());
		if (user != null) {
			SimpleAuthorizationInfo info = new SimpleAuthorizationInfo();
			List<Menu> list = UserUtils.getMenuList();
			for (Menu menu : list){
				if (org.apache.commons.lang3.StringUtils.isNotBlank(menu.getPermission())){
					// 添加基于Permission的权限信息
					for (String permission : org.apache.commons.lang3.StringUtils.split(menu.getPermission(),",")){
						info.addStringPermission(permission);
					}
				}
			}
			// 添加用户权限
			info.addStringPermission("user");
			// 添加用户角色信息
			for (Role role : user.getRoleList()){
				info.addRole(role.getEnname());
			}
			// 更新登录IP和时间
			getSystemService().updateUserLoginInfo(user);
			// 记录登录日志
			LogUtils.saveLog(Servlets.getRequest(), "系统登录");
			return info;
		} else {
			return null;
		}
	
    }  
  
    protected List<String> split(String s) {  
        List<String> list = new ArrayList<String>();  
        String elements[] = StringUtils.split(s, ',');  
        if (elements != null && elements.length > 0) {  
            String arr$[] = elements;  
            int len$ = arr$.length;  
            for (int i$ = 0; i$ < len$; i$++) {  
                String element = arr$[i$];  
                if (StringUtils.hasText(element))  
                    list.add(element.trim());  
            }  
  
        }  
        return list;  
    }  
  
    protected void addRoles(SimpleAuthorizationInfo simpleAuthorizationInfo, List<String> roles) {  
        String role;  
        for (Iterator<String> i$ = roles.iterator(); i$.hasNext(); simpleAuthorizationInfo.addRole(role))  
            role = (String) i$.next();  
  
    }  
  
    protected void addPermissions(SimpleAuthorizationInfo simpleAuthorizationInfo, List<String> permissions) {  
        String permission;  
        for (Iterator<String> i$ = permissions.iterator(); i$.hasNext(); simpleAuthorizationInfo  
                .addStringPermission(permission))  
            permission = (String) i$.next();  
  
    }  
    
	public SystemService getSystemService() {
		if (systemService == null){
			systemService = SpringContextHolder.getBean(SystemService.class);
		}
		return systemService;
	}
}

3.需要注意的事项:

配置文件中配置的logout，为logoutFilter,redirectUrl为认证服务器注销之后的重定向地址，单点登录需要配置用于注销重定向，否则注销之后，页面会停留在单点登录服务器，不会调到我们自己的应用。修改认证服务器的cas-servlet，路径为WEB-INF/cas-servet.xml，把false改为true

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