Topic: Spring Security 3 与 CAS单点登录配置-Client_综合

转载：

http://www.hxdw.com/bbs/post/print?bid=60&id=144183

Topic: Spring Security 3 与 CAS单点登录配置-Client

1.Spring Security 3 与 CAS单点登录配置-Client

Copy to clipboard

Posted by: netboy
Posted on: 2010-11-12 11:27

如果CAS配置完成。就可以进行Client的配置了。
以下Client的配置前提是你对Spring Security有一定了解。如果不熟悉，还是希望能先读一下Spring Security相关的文章。

下面是Client的Spring Security 3的最基础的配置

1.配置<http>标签
Xml代码
<http auto-config="false" entry-point-ref="casEntryPoint" servlet-api-provision="true">
<intercept-url pattern="/manage/**" access="ROLE_ADMIN" />
<intercept-url pattern="/**" access="ROLE_USER,ROLE_ADMIN" />

<logout logout-url="/logout.html" success-handler-ref="casLogoutSuccessHandler"/>
<custom-filter position="FORM_LOGIN_FILTER" ref="casFilter"/>
</http>

  <http auto-config="false" entry-point-ref="casEntryPoint" servlet-api-provision="true">
    <intercept-url pattern="/manage/**" access="ROLE_ADMIN" />
    <intercept-url pattern="/**" access="ROLE_USER,ROLE_ADMIN" />
    
    <logout logout-url="/logout.html" success-handler-ref="casLogoutSuccessHandler"/>
    <custom-filter position="FORM_LOGIN_FILTER" ref="casFilter"/>
  </http>

这里，重点是：

* 不使用http的自动配置。
* entry-point-ref="casEntryPoint"作用是认证的入口，是一个实现 AuthenticationEntryPoint接口的类。为ExceptionTranslationFilter类提供认证依据。
* <custom-filter position="FORM_LOGIN_FILTER" ref="casFilter"/> 使用自定义的Filter，放置在过滤器链的FORM_LOGIN_FILTER的位置。
似乎casFilter与casEntryPoint的功能有重叠。
其实，casEntryPoint只是提供认证入口的作用，当没有权限，将跳转到该地址。
casFilter是处理CAS service ticket的。当无权访问时，会使用casEntryPoint提供认证入口。

2.分别配置casEntryPoint和casFilter
配置：casEntryPoint
Xml代码
<beans:bean id="casEntryPoint"
class="org.springframework.security.cas.web.CasAuthenticationEntryPoint">
<beans:property name="loginUrl" value="https://cas.boc.com:8443/casServer/login"/>
<beans:property name="serviceProperties" ref="serviceProperties"/>
</beans:bean>
<beans:bean id="serviceProperties" class="org.springframework.security.cas.ServiceProperties">
<beans:property name="service"
value="https://report.boc.com:8443/report/j_spring_cas_security_check"/>
<beans:property name="sendRenew" value="false"/>
</beans:bean>

<beans:bean id="casEntryPoint"
  class="org.springframework.security.cas.web.CasAuthenticationEntryPoint">
  <beans:property name="loginUrl" value="https://cas.boc.com:8443/casServer/login"/>
  <beans:property name="serviceProperties" ref="serviceProperties"/>
</beans:bean>
<beans:bean id="serviceProperties" class="org.springframework.security.cas.ServiceProperties">
  <beans:property name="service"
  value="https://report.boc.com:8443/report/j_spring_cas_security_check"/>
<beans:property name="sendRenew" value="false"/>
</beans:bean>

配置casFilter
Xml代码
<beans:bean id="casFilter"
class="org.springframework.security.cas.web.CasAuthenticationFilter">
<beans:property name="authenticationManager" ref="authenticationManager"/>
</beans:bean>

<authentication-manager alias="authenticationManager">
<authentication-provider ref="casAuthenticationProvider"/>
</authentication-manager>

<beans:bean id="userDetailsService" class="com.reportstart.security.service.impl.BocUserDetaislServiceImpl">
<beans:property name="userDao">
<beans:ref bean="userDao"/>
</beans:property>
</beans:bean>

<beans:bean id="casAuthenticationUserDetailsService" class="org.springframework.security.core.userdetails.UserDetailsByNameServiceWrapper">
<beans:property name="userDetailsService" >
<beans:ref local="userDetailsService"/>
</beans:property>
</beans:bean>

<beans:bean id="casAuthenticationProvider"
class="org.springframework.security.cas.authentication.CasAuthenticationProvider">
<beans:property name="authenticationUserDetailsService" ref="casAuthenticationUserDetailsService"/>
<beans:property name="serviceProperties" ref="serviceProperties" />
<beans:property name="ticketValidator">
<beans:bean class="org.jasig.cas.client.validation.Cas20ServiceTicketValidator">
<beans:constructor-arg index="0" value="https://cas.boc.com:8443/casServer" />
</beans:bean>
</beans:property>
<beans:property name="key" value="an_id_for_this_auth_provider_only"/>
</beans:bean>
</beans:bean>

<beans:bean id="casFilter"
      class="org.springframework.security.cas.web.CasAuthenticationFilter">
    <beans:property name="authenticationManager" ref="authenticationManager"/>
  </beans:bean>

  <authentication-manager alias="authenticationManager">
    <authentication-provider ref="casAuthenticationProvider"/>
  </authentication-manager>

  <beans:bean id="userDetailsService" class="com.reportstart.security.service.impl.BocUserDetaislServiceImpl">
    <beans:property name="userDao">
      <beans:ref bean="userDao"/>
    </beans:property>
  </beans:bean>

  <beans:bean id="casAuthenticationUserDetailsService" class="org.springframework.security.core.userdetails.UserDetailsByNameServiceWrapper">
    <beans:property name="userDetailsService" >
      <beans:ref local="userDetailsService"/>
    </beans:property>
  </beans:bean>

  <beans:bean id="casAuthenticationProvider"
      class="org.springframework.security.cas.authentication.CasAuthenticationProvider">
    <beans:property name="authenticationUserDetailsService" ref="casAuthenticationUserDetailsService"/>
    <beans:property name="serviceProperties" ref="serviceProperties" />
    <beans:property name="ticketValidator">
      <beans:bean class="org.jasig.cas.client.validation.Cas20ServiceTicketValidator">
       <beans:constructor-arg index="0" value="https://cas.boc.com:8443/casServer" />
   </beans:bean>
    </beans:property>
    <beans:property name="key" value="an_id_for_this_auth_provider_only"/>
  </beans:bean>
</beans:bean>

如果对Spring Security比较熟悉，就不用多说什么了。
这里的"https://report.boc.com:8443/report/j_spring_cas_security_check"地址要注意，以后这个地址要注册到CAS service里，从而改变CAS的"open model".
也只有这个地址是指向Client的，其他都指向Server

最后，casLogoutSuccessHandler
如果Client要注销，需在Client先注销，之后让Server注销提供的ticket。
如果不这样，不论是只注销Client还是Server，注销后，系统仍然还是可以访问的。
(按照开始的想法，注销Client，Client应该可以主动去Server去注销ticket，但是org.springframework.security.web.authentication.logout.LogoutFilter总注销自己，而不去跟Client交互。如果你知道的话，请告知。)
CasLogoutSuccessHandler 代码
Java代码
package net.viiso.security.util;

import java.io.IOException;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.springframework.security.core.Authentication;
import org.springframework.security.web.authentication.logout.LogoutSuccessHandler;
public class CasLogoutSuccessHandler implements LogoutSuccessHandler {

private String url = "";
@Override
public void onLogoutSuccess(HttpServletRequest request,
HttpServletResponse response, Authentication authentication)
throws IOException, ServletException {

if ("".equals(url)) {
url = "https://cas.boc.com:8443/casServer/logout";
}
response.sendRedirect(url);
}
public void setTargetUrl(String url) {
this.url = url;
}
}

package net.viiso.security.util;

import java.io.IOException;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.springframework.security.core.Authentication;
import org.springframework.security.web.authentication.logout.LogoutSuccessHandler;
public class CasLogoutSuccessHandler implements LogoutSuccessHandler {

  private String url = "";
  @Override
  public void onLogoutSuccess(HttpServletRequest request,
      HttpServletResponse response, Authentication authentication)
      throws IOException, ServletException {

    if ("".equals(url)) {
      url = "https://cas.boc.com:8443/casServer/logout";
    }
    response.sendRedirect(url);
  }
  public void setTargetUrl(String url) {
    this.url = url;
  }
}

启动后，对一个安全地址进行访问，会跳到CAS登录地址。
如果登录成功，会跳至访问页。
到此，简单的Client已经配置完成。
接下来，还要在Server注册Client。这个虽然不是必须，但是出于安全考虑，如果CAS服务器在外网，就非常有必要对支持的Client进行注册了，因为当你访问Client在CAS登陆成功后，CAS会给你的Client提供登录者的用户信息。如果你模拟一个Client应用，使用暴力方式，不断给CAS提供用户口令和密码，会对安全性造成破坏。
另外，也可以给CAS登录页加一个验证码。