SSO之CAS + LDAP

原本主要详细是介绍CAS和LDAP整合实现单点登陆的步骤。

1. 依《SSO之安装CAS Server》所述安装好CAS Server。
2. 安装ApacheDS。安装好ApacheDS后能够用Apache Directory Studio对其进行维护。须要注意的是ApacheDS端口号是10389，默认用户uid=admin,ou=system，密码secret。
3. 创建组织架构。全部人员创建在ou=people,dc=comple,dc=com下面，第一阶是部门，再下面能够是职员，也能够是子部门。

4. 打开tomcat/webapps/cas/WEB-INF/deployerConfigContext.xml，找到以下内容：

<!--
    | This is the authentication handler declaration that every CAS deployer will need to change before deploying CAS 
    | into production.  The default SimpleTestUsernamePasswordAuthenticationHandler authenticates UsernamePasswordCredentials
    | where the username equals the password.  You will need to replace this with an AuthenticationHandler that implements your
    | local authentication strategy.  You might accomplish this by coding a new such handler and declaring
    | edu.someschool.its.cas.MySpecialHandler here, or you might use one of the handlers provided in the adaptors modules.
    +-->
<bean 
    class="org.jasig.cas.authentication.handler.support.SimpleTestUsernamePasswordAuthenticationHandler" />

修改为以下：

<!--
<bean 
    class="org.jasig.cas.authentication.handler.support.SimpleTestUsernamePasswordAuthenticationHandler" />
-->
<bean class="org.jasig.cas.adaptors.ldap.BindLdapAuthenticationHandler">
    <property name="filter" value="cn=%u" />
    <property name="searchBase" value="ou=people,dc=example,dc=com" />
    <property name="contextSource" ref="contextSource" />
    <property name="allowMultipleAccounts" value="true" />
</bean>

还要在最后加上contextSource定义：

<bean id="contextSource" class="org.springframework.ldap.core.support.LdapContextSource">
    <property name="userDn" value="uid=admin,ou=system" />
    <property name="password" value="secret" />
    <property name="pooled" value="true" />
    <property name="urls">
        <list>
            <value>ldap://192.168.12.250:10389</value>
        </list>
    </property>
    <property name="baseEnvironmentProperties">
        <map>
            <entry key="java.naming.security.authentication" value="simple" />
        </map>
    </property>
</bean>

5. 将cas-server-3.5.2.1-release.zip里面的modules/cas-server-support-ldap-3.5.2.1.jar复制到cas/WEB-INF/lib。下载spring-ldap-core和spring-ldap-core-tiger到cas/WEB-INF/lib，注意对当前cas server来讲，最好用1.3.2的版本。具体能够参考《Eclipse调试cas server 3.5.2.1》。

6. 重启tomcat，登陆cas/login测试。



注意事项：
1. CAS验证有问题时能够经过cas.log查询一下。
2. LDAP不须要uid属性，但必定须要userPassword属性。

参考：
SSO之CAS+LDAP实现单点登陆认证 
SSO之CAS单点登陆实例演示
Eclipse调试cas server 3.5.2.1