第三部分：shiro集成spring使用cas单点登录配置
第三部分 shiro集成spring使用cas单点登录配置
（一）shiro单点登录
配置的主要目的在于将登录页面改为${cas.server}?service=${cas.client}/login的形式，service后面为本地的回调地址。在cas服务器端登录成功后，会生成ticket返回给客户端，客户端的shiro使用ticket最为凭据保存起来。
shiro配置单点登陆后，在注销时原始的cas-client只能删除HttpSession，不能删除shiro的Session，因此未使用shiro的session管理器。
如果想启用shiro的Session管理器，可以参考Shiro & CAS 实现单点登录。
原有的CasRealm在AuthenticationInfo中只保存了用户名作为principal，MyCasRealm中重写了此方法，改为保存用户信息类。
需要在pom增加依赖，shiro-cas会通过依赖传递自动增加cas-client-core-3.2.1的依赖。
<dependency>
<groupId>org.apache.shirogroupId>
<artifactId>shiro-springartifactId>
<version>1.2.3version>
dependency>
<dependency>
<groupId>org.apache.shirogroupId>
<artifactId>shiro-casartifactId>
<version>1.2.3version>
dependency>1、spring-shiro.xml配置
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:util="http://www.springframework.org/schema/util"
xmlns:aop="http://www.springframework.org/schema/aop"
xmlns:context="http://www.springframework.org/schema/context"
xsi:schemaLocation="
http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util.xsd
http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop.xsd
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd
" default-lazy-init="false">
<description>Shiro安全配置description>
<bean id="cacheManager" class="com.whty.framework.base.common.cache.SpringCacheManagerWrapper">
<property name="cacheManager" ref="springCacheManager"/>
bean>
<bean id="casRealm" class="com.whty.oim.base.shiro.MyCasRealm">
<property name="cachingEnabled" value="true"/>
<property name="authenticationCachingEnabled" value="true"/>
<property name="authenticationCacheName" value="authenticationCache"/>
<property name="authorizationCachingEnabled" value="true"/>
<property name="authorizationCacheName" value="authorizationCache"/>
<property name="casServerUrlPrefix" value="${cas.server}"/>
<property name="casService" value="${cas.client}/login"/>
bean>
<bean id="casSubjectFactory" class="org.apache.shiro.cas.CasSubjectFactory"/>
<bean id="securityManager" class="org.apache.shiro.web.mgt.DefaultWebSecurityManager">
<property name="realm" ref="casRealm"/>
<property name="cacheManager" ref="cacheManager"/>
<property name="subjectFactory" ref="casSubjectFactory"/>
bean>
<bean class="org.springframework.beans.factory.config.MethodInvokingFactoryBean">
<property name="staticMethod" value="org.apache.shiro.SecurityUtils.setSecurityManager"/>
<property name="arguments" ref="securityManager"/>
bean>
<bean id="casFilter" class="org.apache.shiro.cas.CasFilter">
<property name="failureUrl" value="${cas.client}"/>
bean>
<bean id="shiroFilter" class="org.apache.shiro.spring.web.ShiroFilterFactoryBean">
<property name="securityManager" ref="securityManager" />
<property name="loginUrl" value="${cas.server}?service=${cas.client}/login" />
<property name="successUrl" value="/index" />
<property name="unauthorizedUrl" value="/"/>
<property name="filters">
<util:map>
<entry key="cas" value-ref="casFilter"/>
util:map>
property>
<property name="filterChainDefinitions">
<value>
/logout = logout
/login = cas
/** = user
value>
property>
bean>
<bean id="lifecycleBeanPostProcessor" class="org.apache.shiro.spring.LifecycleBeanPostProcessor" />
beans>2、cas.properties
cas.server=http://192.168.5.129:8080/cas
cas.client=http://192.168.4.184:8091/ucs
3、自定义Realm实现
主要修改了CasRealm的doGetAuthenticationInfo()方法，CasRealm默认只保存了username，本系统改为保存ShiroUser对象。
public class MyCasRealm extends CasRealm {
Logger logger = LoggerFactory.getLogger(MyCasRealm.class);
@Autowired
private UcsUserService ucsUserService;
@Autowired
private UcsRoleService ucsRoleService;
@Autowired
private UcsPermissionService ucsPermissionService;
@Value("${domain}")
private String domain;
/**
* 授权查询回调函数, 进行鉴权但缓存中无用户的授权信息时调用.
*
* @see org.apache.shiro.realm.AuthorizingRealm#doGetAuthorizationInfo(org.apache.shiro.subject.PrincipalCollection)
*/
@Override
protected AuthorizationInfo doGetAuthorizationInfo(PrincipalCollection principals) {
ShiroUser shiroUser = (ShiroUser) principals.getPrimaryPrincipal();
UcsUser ucsUser = ucsUserService.selectByUsername(shiroUser.loginName);
//把principals放session中 key=userId value=principals
SecurityUtils.getSubject().getSession().setAttribute(String.valueOf(ucsUser.getId()),SecurityUtils.getSubject().getPrincipals());
SimpleAuthorizationInfo info = new SimpleAuthorizationInfo();
//赋予角色
List ucsRoles = ucsRoleService.selectByUser(ucsUser.getId());
if (!CheckEmptyUtil.isEmpty(ucsRoles)){
for(UcsRole ucsRole:ucsRoles){
info.addRole(ucsRole.getId());
}
}
//赋予权限
// List ucsPermissions = ucsPermissionService.selectByUser(ucsUser.getId(), domain);
if (!CheckEmptyUtil.isEmpty(shiroUser.getMenus())){
for(EasyUIMenu permission:shiroUser.getMenus()){
if(UcsBaseConstant.PermissionType.BUTTON.equals(permission.getType()))
info.addStringPermission(permission.getUrl());
}
}
return info;
}
/**
* Authenticates a user and retrieves its information.
*
* @param token the authentication token
* @throws AuthenticationException if there is an error during authentication.
*/
@Override
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 {
// contact CAS server to validate service ticket
Assertion casAssertion = ticketValidator.validate(ticket, getCasService());
// get principal, user id and attributes
AttributePrincipal casPrincipal = casAssertion.getPrincipal();
String username = casPrincipal.getName();
logger.debug("Validate ticket : {} in CAS server : {} to retrieve user : {}", new Object[]{
ticket, getCasServerUrlPrefix(), username
});
Map attributes = casPrincipal.getAttributes();
// refresh authentication token (user id + remember me)
casToken.setUserId(username);
String rememberMeAttributeName = getRememberMeAttributeName();
String rememberMeStringValue = (String)attributes.get(rememberMeAttributeName);
boolean isRemembered = rememberMeStringValue != null && Boolean.parseBoolean(rememberMeStringValue);
if (isRemembered) {
casToken.setRememberMe(true);
}
// create simple authentication info
// 根据用户名获取账号信息
UcsUser ucsUser = ucsUserService.selectByUsername(username);
List ucsPermissions = null;
if (ucsUser != null) {
ucsPermissions = ucsPermissionService.selectByUser(ucsUser.getId(), domain);
} else {
throw new UnknownAccountException();//登录失败
}
//给菜单排序
List menus = toEasyUIMenu(ucsPermissions);
if(!CheckEmptyUtil.isEmpty(menus)){
Collections.sort(menus);
}
ShiroUser shiroUser = new ShiroUser(ucsUser.getId(), ucsUser.getUsername(), ucsUser.getName(), menus);
return new SimpleAuthenticationInfo(shiroUser, ticket, getName());
} catch (TicketValidationException e) {
throw new CasAuthenticationException("Unable to validate ticket [" + ticket + "]", e);
}
}
private List toEasyUIMenu(List ucsPermissions){
List menus = new ArrayList(0);
for (UcsPermission ucsPermission : ucsPermissions) {
menus.add(toEasyUIMenu(ucsPermission));
}
return menus;
}
private EasyUIMenu toEasyUIMenu(UcsPermission ucsPermission){
return new EasyUIMenu(ucsPermission.getId(), ucsPermission.getPid(), ucsPermission.getDomain(), ucsPermission.getName(), ucsPermission.getType(), ucsPermission.getSort(), ucsPermission.getIcon(), ucsPermission.getUrl(), ucsPermission.getDescription(), ucsPermission.getStatus());
}
@Override
public void clearCachedAuthorizationInfo(PrincipalCollection principals) {
super.clearCachedAuthorizationInfo(principals);
}
@Override
public void clearCachedAuthenticationInfo(PrincipalCollection principals) {
super.clearCachedAuthenticationInfo(principals);
}
@Override
public void clearCache(PrincipalCollection principals) {
super.clearCache(principals);
clearAllCache();
}
public void clearAllCachedAuthorizationInfo() {
getAuthorizationCache().clear();
}
public void clearAllCachedAuthenticationInfo() {
getAuthenticationCache().clear();
}
public void clearAllCache() {
clearAllCachedAuthenticationInfo();
clearAllCachedAuthorizationInfo();
}
} （二）cas登出
在任意一个子系统登出后，cas服务器会向所有发过登录请求的子系统发送一个登出请求，使所有子系统的HttpSession失效。如果使用了shiro的session管理器，需要修改cas客户端代码，在移除HttpSession的时候也移除shiro的Session。
1、web.xml
web.xml中需要加入cas的SingleSignOutFilter实现单点登出功能，该过滤器需要放在shiroFilter之前，spring字符集过滤器之后。在实际使用时发现，SingleSignOutFilter如果放在了spring字符集过滤器之前，数据在传输过程中就会出现乱码。
<listener>
<listener-class>org.jasig.cas.client.session.SingleSignOutHttpSessionListenerlistener-class>
listener>
<filter>
<filter-name>CAS Single Sign Out Filterfilter-name>
<filter-class>org.jasig.cas.client.session.SingleSignOutFilterfilter-class>
filter>
<filter-mapping>
<filter-name>CAS Single Sign Out Filterfilter-name>
<url-pattern>/*url-pattern>
filter-mapping>2、登出请求
登出只需要将当前页面跳转到cas服务器的logout页面即可实现登出。如果需要登出后跳转页面，可以加入service参数，并参考第一部分中第四节进行配置。
子系统使用的方法是在后台拼装好登出链接，发送给前台页面，前台页面接受使用el表达式接收。具体实现需要根据每个子系统的不同来自行实现。
@Value("${cas.server}")
private String cas_server;
@Value("${cas.client}")
private String cas_client;
@RequestMapping(value = "/index")
public String index(Model model){
StringBuilder logoutUrl = new StringBuilder();
logoutUrl.append(cas_server);
logoutUrl.append("/logout?service=");
logoutUrl.append(cas_client);
model.addAttribute("logoutUrl", logoutUrl.toString());
return "system/index";
}前台页面：
<script>
var logoutUrl = '${logoutUrl}';
script>缓存配置（可选）
我使用的ehcache作为shiro的缓存，也可以使用其他的。
spring-cache.xml
<beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:aop="http://www.springframework.org/schema/aop" xmlns:context="http://www.springframework.org/schema/context"
xmlns:jdbc="http://www.springframework.org/schema/jdbc" xmlns:tx="http://www.springframework.org/schema/tx"
xsi:schemaLocation="
http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop.xsd
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd
http://www.springframework.org/schema/jdbc http://www.springframework.org/schema/jdbc/spring-jdbc.xsd
http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx.xsd"
default-lazy-init="false">
<bean id="springCacheManager" class="org.springframework.cache.ehcache.EhCacheCacheManager">
<property name="cacheManager" ref="ehcacheManager"/>
bean>
<bean id="ehcacheManager" class="org.springframework.cache.ehcache.EhCacheManagerFactoryBean">
<property name="configLocation" value="classpath:properties/ehcache.xml"/>
bean>
beans>ehcache.xml
<ehcache xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:noNamespaceSchemaLocation="ehcache.xsd"
updateCheck="true" monitoring="autodetect"
dynamicConfig="true">
<diskStore path="C:\\ehcache\\cache"/>
<cache name="passwordRetryEhcache"
maxEntriesLocalHeap="2000"
eternal="false"
timeToIdleSeconds="1800"
timeToLiveSeconds="0"
overflowToDisk="false"
statistics="true">
cache>
<cache name="authorizationCache"
maxEntriesLocalHeap="2000"
eternal="false"
timeToIdleSeconds="3600"
timeToLiveSeconds="0"
overflowToDisk="false"
statistics="true">
cache>
<cache name="authenticationCache"
maxEntriesLocalHeap="2000"
eternal="false"
timeToIdleSeconds="3600"
timeToLiveSeconds="0"
overflowToDisk="false"
statistics="true">
cache>
<cache name="shiro-activeSessionCache"
maxEntriesLocalHeap="2000"
eternal="false"
timeToIdleSeconds="3600"
timeToLiveSeconds="0"
overflowToDisk="false"
statistics="true">
cache>
<defaultCache
maxElementsInMemory="1000"
eternal="false"
timeToIdleSeconds="120"
timeToLiveSeconds="120"
overflowToDisk="true"
maxElementsOnDisk="10000"
diskSpoolBufferSizeMB="30"
diskPersistent="false"
diskExpiryThreadIntervalSeconds="120"
memoryStoreEvictionPolicy="LRU"
statistics="false"
/>
ehcache>