Cas入门

cas是个好东西，很灵活很好用，但是配置起来很麻烦，网上资料比较零碎。不弄个三五天根本不知道其中的原理，终于在多天的奋斗中配置成功，现在将配置的一些过程记录下来供大家参考。

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

XML/HTML代码

<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

XML/HTML代码

<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

XML/HTML代码

<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。

XML/HTML代码

<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

XML/HTML代码

<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

XML/HTML代码

<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

XML/HTML代码

<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

XML/HTML代码

<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

XML/HTML代码

<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

XML/HTML代码

<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

XML/HTML代码

<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

C++代码

@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。

XML/HTML代码

<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

XML/HTML代码

<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></sp

  


  
    
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