cas 单点登录配置速成

原理描述
子系统所有请求被CAS过滤器拦截（web.xml中定义的cas过滤器）到，过滤器会将页面重定向CAS Server，CAS Server会判断用户是否已经登录，如果未登录，则定位到登录页面(CAS Server内的)。登录成功后，再重定向到用户先前访问的本系统页面。此时session里有一个名为的 edu.yale.its.tp.cas.client.filter.user属性。它存储的就是用户的登录名

 

cas官方网站

http://www.jasig.org/cas

下载最新的服务端 CAS Server 3.3.3 Final

解压后将modules下面的cas-server-webapp-3.3.3.war部署到web服务器，作为单点登录的服务器。

登录的服务器下面很多配置文件，通过配置可以做一些扩展。

修改点1：验证方式使用我们自己的用户表验证

cas和当前已有的系统做集成的入口

 

1.修改deployerConfigContext.xml文件

添加数据源配置

 

< bean id = "casDataSource" class = "org.apache.commons.dbcp.BasicDataSource" > 
< property name = "driverClassName" > 
< value > com.mysql.jdbc.Driver </ value > 
</ property > 
< property name = "url" > 
< value > jdbc:mysql://192.168.1.100/ires? useUnicode = true & characterEncoding = UTF -8& autoReconnect = true </ value > 
</ property > 
< property name = "username" > 
< value > ires </ value > 
</ property > 
< property name = "password" > 
< value > i709394 </ value > 
</ property > 
</ bean > 

  

定义MD5的加密方式

< bean id = "passwordEncoder" 
class = "org.jasig.cas.authentication.handler.DefaultPasswordEncoder" autowire = "byName" > 
< constructor-arg value = "MD5" /> 
</ bean > 

  

配置authenticationManager下面的authenticationHandlers属性

< bean class = "org.jasig.cas.adaptors.jdbc.QueryDatabaseAuthenticationHandler" > 
< property name = "dataSource" ref = "casDataSource" /> 
< property name = "sql" value = "select community_password from community_user_info where lower(community_user_info.community_user) = lower(?)" /> 
< property name = "passwordEncoder" ref = "passwordEncoder" /> 
</ bean > 

  

修改点2：获取用户信息保存，方便各个客户端可以统一得到用户信息

1.定义attributeRepository，通过jdbc查询用户的详细信息，可以把用户表或用户的所属组织机构或角色等查询出来。

< bean id = "attributeRepository" class = "org.jasig.services.persondir.support.jdbc.SingleRowJdbcPersonAttributeDao" > 
< constructor-arg index = "0" ref = "casDataSource" /> 
< constructor-arg index = "1" > 
< list > 
< value > username </ value > 
< value > username </ value > 
</ list > 
</ constructor-arg > 
< constructor-arg index = "2" > 
< value > 
select * ,(SELECT orgn_organization.id from orgn_organization left join orgn_member on orgn_member.orgn_id = orgn_organization .id left join community_user_info on community_user_info.id = orgn_member .user_id where community_user_info.community_user = ?) as orgnId from community_user_info where community_user =? 
</ value > 
</ constructor-arg > 
< property name = "columnsToAttributes" > 
< map > 
< entry key = "id" value = "id" /> 
< entry key = "community_user" value = "userName" /> 
< entry key = "orgnId" value = "orgnId" /> 
< entry key = "is_admin" value = "isAdmin" /> 

</ map > 
</ property > 
</ bean > 

 
2.配置authenticationManager中credentialsToPrincipalResolvers属性

< bean class = "org.jasig.cas.authentication.principal.UsernamePasswordCredentialsToPrincipalResolver" > 
< property name = "attributeRepository" ref = "attributeRepository" /> </ bean > 

 

注意：默认cas登录服务器没有把用户信息传到客户端中 ，所以要修改WEB- INF\view\jsp\protocol\2.0\casServiceValidationSuccess.jsp文件，增加

< c:if test = "${fn:length(assertion.chainedAuthentications[fn:length(assertion.chainedAuthentications)-1].principal.attributes) > 0}" > 
< cas:attributes > 
< c:forEach var = "attr" items = "${assertion.chainedAuthentications[fn:length(assertion.chainedAuthentications)-1].principal.attributes}" > 
< cas: ${fn:escapeXml(attr.key)} > ${fn:escapeXml(attr.value)} </ cas: ${fn:escapeXml(attr.key)} > 
</ c:forEach > 
</ cas:attributes > 
</ c:if > 

 
修改点3：用数据库来保存登录的会话

这样服务器在重新启动的时候不会丢失会话。

1.修改ticketRegistry.xml文件

将默认的ticketRegistry改成

< bean id = "ticketRegistry" class = "org.jasig.cas.ticket.registry.JpaTicketRegistry" > 
< constructor-arg index = "0" ref = "entityManagerFactory" /> 
</ bean > 

< bean id = "entityManagerFactory" class = "org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean" > 
< property name = "dataSource" ref = "dataSource" /> 
< property name = "jpaVendorAdapter" > 
< bean class = "org.springframework.orm.jpa.vendor.HibernateJpaVendorAdapter" > 
< property name = "generateDdl" value = "true" /> 
< property name = "showSql" value = "true" /> 
</ bean > 
</ property > 
< property name = "jpaProperties" > 
< props > 
< prop key = "hibernate.dialect" > org.hibernate.dialect.MySQLDialect </ prop > 
< prop key = "hibernate.hbm2ddl.auto" > update </ prop > 
</ props > 
</ property > 
</ bean > 

< bean id = "transactionManager" class = "org.springframework.orm.jpa.JpaTransactionManager" 
p:entityManagerFactory-ref = "entityManagerFactory" /> 

< tx:annotation-driven transaction-manager = "transactionManager" /> 

< bean 
id = "dataSource" 
class = "org.apache.commons.dbcp.BasicDataSource" 
p:driverClassName = "com.mysql.jdbc.Driver" 
p:url = "jdbc:mysql://192.168.1.100:3306/cas?useUnicode=true&characterEncoding=UTF-8&autoReconnect=true" 
p:password = "709394" 
p:username = "itravel" /> 

 
配置完之后还需要一些jar的支持，根据提示那些包缺少到网上找。

修改点4：配置remenber me的功能，可以让客户端永久保存session

1.修改deployerConfigContext.xml文件

authenticationManager增加authenticationMetaDataPopulators属性

< property name = "authenticationMetaDataPopulators" > 
< list > 
< bean class = "org.jasig.cas.authentication.principal.RememberMeAuthenticationMetaDataPopulator" /> 
</ list > 
</ property > 

 
2.修改cas-servlet.xml

修改authenticationViaFormAction配置变成

< bean id = "authenticationViaFormAction" class = "org.jasig.cas.web.flow.AuthenticationViaFormAction" 
p:centralAuthenticationService-ref = "centralAuthenticationService" 
p:formObjectClass = "org.jasig.cas.authentication.principal.RememberMeUsernamePasswordCredentials" 
p:formObjectName = "credentials" 
p:validator-ref = "UsernamePasswordCredentialsValidator" 
p:warnCookieGenerator-ref = "warnCookieGenerator" /> 

 

 

增加UsernamePasswordCredentialsValidator

< bean id = "UsernamePasswordCredentialsValidator" class = "org.jasig.cas.validation.UsernamePasswordCredentialsValidator" /> 
修改ticketExpirationPolicies.xml，grantingTicketExpirationPolicy配置如下，注意时间要加大，不然session很容易过期，达不到remember me的效果。

XML/HTML代码
< bean id = "grantingTicketExpirationPolicy" class = "org.jasig.cas.ticket.support.RememberMeDelegatingExpirationPolicy" > 
< property name = "sessionExpirationPolicy" > 
< bean class = "org.jasig.cas.ticket.support.TimeoutExpirationPolicy" > 
< constructor-arg index = "0" value = "2592000000" /> 
</ bean > 
</ property > 
< property name = "rememberMeExpirationPolicy" > 
< bean class = "org.jasig.cas.ticket.support.TimeoutExpirationPolicy" > 
< constructor-arg index = "0" value = "2592000000" /> 
</ bean > 
</ property > 
</ bean > 

 

 

修改点5：取消https验证

在网络安全性较好，对系统安全没有那么高的情况下可以取消https验证，使系统更加容易部署。

1.修改ticketGrantingTicketCookieGenerator.xml

< bean id = "ticketGrantingTicketCookieGenerator" class = "org.jasig.cas.web.support.CookieRetrievingCookieGenerator" 
p:cookieSecure = "false" 
p:cookieMaxAge = "-1" 
p:cookieName = "CASTGC" 
p:cookiePath = "/cas" /> 

 

 

p:cookieSecure改成false，客户端web.xml中单独服务器的链接改成http

使用https协议的配置

1.证书生成和导入

下面是一个生成证书和导入证书的bat脚本，如果web应用和单独登录服务器部署在同一台机可以一起执行

@echo off 
if "%JAVA_HOME%" == "" goto error 
@echo on 

@echo off 
cls 
rem please set the env JAVA_HOME before run this bat file 
rem delete alia tomcat if it is existed 
keytool - delete -alias tomcatsso -keystore "%JAVA_HOME%/jre/lib/security/cacerts" -storepass changeit 
keytool - delete -alias tomcatsso -storepass changeit 
REM （注释： 清除系统中可能存在的名字为tomcatsso 的同名证书） 
rem list all alias in the cacerts 
keytool -list -keystore "%JAVA_HOME%/jre/lib/security/cacerts" -storepass changeit 
REM （注释： 列出系统证书仓库中存在证书名称列表） 
rem generator a key 
keytool -genkey -keyalg RSA -alias tomcatsso -dname "cn=localhost" -storepass changeit 
REM （注释：指定使用RSA算法，生成别名为tomcatsso的证书，存贮口令为 changeit，证书的DN为 "cn=linly" ，这个DN 必须同当前主机完整名称一致哦，切记！！！） 
rem export the key 
keytool -export -alias tomcatsso -file "%java_home%/jre/lib/security/tomcatsso.crt" -storepass changeit 
REM （注释： 从keystore中导出别名为tomcatsso的证书，生成文件 tomcatsso.crt） 
rem import into trust cacerts 
keytool -import -alias tomcatsso -file "%java_home%/jre/lib/security/tomcatsso.crt" -keystore "%java_home%/jre/lib/security/cacerts" -storepass changeit 
REM （注释：将tomcatsso.crt导入jre的可信任证书仓库。注意，安装 JDK是有两个jre目录，一个在jdk底下，一个是独立的jre，这里的目录必须同Tomcat使用的jre目录一致，否则后面Tomcat的 HTTPS通讯就找不到证书了） 
rem list all alias in the cacerts 
keytool -list -keystore "%JAVA_HOME%/jre/lib/security/cacerts" -storepass changeit 
pause 

:error 
echo 请先设置JAVA_HOME环境变量 
:end 

 

 

3.将.keystore文件拷贝到tomcat的conf目录下面，注意.keystore会在证书生成的时候生成到系统的用户文件夹中，如 windows会生产到C:\Documents and Settings\[yourusername]\下面

2.配置tomcat，把https协议的8443端口打开，指定证书的位置。

< Connector port = "8443" maxHttpHeaderSize = "8192" 
maxThreads = "150" minSpareThreads = "25" maxSpareThreads = "75" 
enableLookups = "false" disableUploadTimeout = "true" 
acceptCount = "100" scheme = "https" secure = "true" 
clientAuth = "false" sslProtocol = "TLS" 
keystoreFile = "conf/.keystore" keystorePass = "changeit" truststoreFile = "C:\Program Files\Java\jdk1.5.0_07\jre\lib\security\cacerts" /> 

 

 

客户端配置

cas官方网站上面的客户端下载地址比较隐秘，没有完全公开，具体地址为

http://www.ja-sig.org/downloads/cas-clients/

下载最新的cas-client-3.1.6-release.zip

1.解压后把modules下面的包放到我们的web应用中

2.配置web.xml,注意encodingFilter要提前配置，不然会出现数据插入数据库的时候有乱码。

serverName是我们web应用的地址和端口

< context-param > 
< param-name > serverName </ param-name > 


< param-value > 192.168.1.145:81 </ param-value > 

</ context-param > 


< filter > 
< filter-name > encodingFilter </ filter-name > 
< filter-class > 
org.springframework.web.filter.CharacterEncodingFilter 
</ filter-class > 
< init-param > 
< param-name > encoding </ param-name > 
< param-value > UTF-8 </ param-value > 
</ init-param > 
< init-param > 
< param-name > forceEncoding </ param-name > 
< param-value > true </ param-value > 
</ init-param > 
</ filter > 

< filter-mapping > 
< filter-name > encodingFilter </ filter-name > 
< url-pattern > *.htm </ url-pattern > 
</ filter-mapping > 

< filter-mapping > 
< filter-name > encodingFilter </ filter-name > 
< url-pattern > *.ftl </ url-pattern > 
</ filter-mapping > 

< filter-mapping > 
< filter-name > encodingFilter </ filter-name > 
< url-pattern > *.xhtml </ url-pattern > 
</ filter-mapping > 
< filter-mapping > 
< filter-name > encodingFilter </ filter-name > 
< url-pattern > *.html </ url-pattern > 
</ filter-mapping > 
< filter-mapping > 
< filter-name > encodingFilter </ filter-name > 
< url-pattern > *.shtml </ url-pattern > 
</ filter-mapping > 


< filter-mapping > 
< filter-name > encodingFilter </ filter-name > 
< url-pattern > *.jsp </ url-pattern > 
</ filter-mapping > 
< filter-mapping > 
< filter-name > encodingFilter </ filter-name > 
< url-pattern > *.do </ url-pattern > 
</ filter-mapping > 
< filter-mapping > 
< filter-name > encodingFilter </ filter-name > 
< url-pattern > *.vm </ url-pattern > 
</ filter-mapping > 

< filter > 
< filter-name > CAS Single Sign Out Filter </ filter-name > 
< filter-class > 
org.jasig.cas.client.session.SingleSignOutFilter 
</ filter-class > 
</ filter > 
< filter-mapping > 
< filter-name > CAS Single Sign Out Filter </ filter-name > 
< url-pattern > /* </ url-pattern > 
</ filter-mapping > 
< listener > 
< listener-class > 
org.jasig.cas.client.session.SingleSignOutHttpSessionListener 
</ listener-class > 
</ listener > 
< filter > 
< filter-name > CAS Authentication Filter </ filter-name > 
< filter-class > 
org.jasig.cas.client.authentication.AuthenticationFilter 
</ filter-class > 
< init-param > 
< param-name > casServerLoginUrl </ param-name > 
< param-value > http://192.168.1.100/cas/login </ param-value > 
</ init-param > 
</ filter > 
< filter > 
< filter-name > CAS Validation Filter </ filter-name > 
< filter-class > 
org.jasig.cas.client.validation.Cas20ProxyReceivingTicketValidationFilter 
</ filter-class > 
< init-param > 
< param-name > casServerUrlPrefix </ param-name > 
< param-value > http://192.168.1.100/cas </ param-value > 
</ init-param > 
</ filter > 

< filter > 
< filter-name > CAS HttpServletRequest Wrapper Filter </ filter-name > 
< filter-class > 
org.jasig.cas.client.util.HttpServletRequestWrapperFilter 
</ filter-class > 
</ filter > 
< filter > 
< filter-name > CAS Assertion Thread Local Filter </ filter-name > 
< filter-class > 
org.jasig.cas.client.util.AssertionThreadLocalFilter 
</ filter-class > 
</ filter > 
< filter-mapping > 
< filter-name > CAS Authentication Filter </ filter-name > 
< url-pattern > /* </ url-pattern > 
</ filter-mapping > 
< filter-mapping > 
< filter-name > CAS Validation Filter </ filter-name > 
< url-pattern > /* </ url-pattern > 
</ filter-mapping > 
< filter-mapping > 
< filter-name > CAS HttpServletRequest Wrapper Filter </ filter-name > 
< url-pattern > /* </ url-pattern > 
</ filter-mapping > 
< filter-mapping > 
< filter-name > CAS Assertion Thread Local Filter </ filter-name > 
< url-pattern > /* </ url-pattern > 
</ filter-mapping > 

 

3.导入证书，如果不用https的话，这步可以跳过，把tomcatsso.crt 证书拷贝到c盘下面，在jdk的bin目录下面运行下面的语句。

JavaScript代码
rem （注释： 清除系统中可能存在的名字为tomcatsso 的同名证书）
keytool - delete -alias tomcatsso -keystore "%JAVA_HOME%/jre/lib/security/cacerts" -storepass changeit
keytool - delete -alias tomcatsso -storepass changeit

rem 在客户端的 JVM 里导入信任的 SERVER 的证书 ( 根据情况有可能需要管理员权限 )
keytool - import -alias tomcatsso -file "c:/tomcatsso.crt" -keystore "%java_home%/jre/lib/security/cacerts" -storepass changeit

客户端获取登录用户名和用户信息实例

 

 

HttpServletRequest request = ServletActionContext.getRequest();   
AttributePrincipal principal = (AttributePrincipal)request.getUserPrincipal(); 
String username = principal.getName();   
Long orgnId = Long.parseLong(principal.getAttributes().get( "orgnId" ).toString());