本文目录:
此文的目的就是为了帮助初步接触SSO和CAS的人员提供一个入门指南,一步一步演示如何实现基于CAS的单点登录。
CAS的官网:http://www.jasig.org/cas
本文演示过程在同一个机器上的(也可以在三台实体机器或者三个的虚拟机上),环境如下:
根据演示需求,用修改hosts 文件的方法添加域名,在文件 C:\Windows\System32\drivers\etc\hosts 文件中添加三条
127.0.0.1 demo.tch.com
127.0.0.1 app1.tch.com
127.0.0.1 app2.tch.com
因为cas是java框架,需要在JVM中运行,所以需要配置安装和配置JDK。可参考娟姐博客
Win7下配置"JAVA环境变量"
CAS默认使用的是HTTPS协议,如果对安全要求不高,可使用HTTP协议。
修改deployerConfigContext.xml 增加参数p:requireSecure="false",是否需要安全验证,即HTTPS,false为不采用。
<beanclass="org.jasig.cas.authentication.handler.support.HttpBasedServiceCredentialsAuthenticationHandler"p:httpClient-ref="httpClient"
p:requireSecure="false" />
修改ticketGrantingTicketCookieGenerator.xml(cas/WEB-INF/spring-configuration/ticketGrantingTicketCookieGenerator.xml) 中ticketGrantingTicketCookieGenerator p:cookieSecure 属性 修改为 false。
<beanid="ticketGrantingTicketCookieGenerator"class="org.jasig.cas.web.support.CookieRetrievingCookieGenerator"
p:cookieSecure="false" p:cookieMaxAge="-1"p:cookieName="CASTGC" p:cookiePath="/cas" />
使用HTTPS协议,步骤如下:
4.1. 生成证书:
keytool-genkey -alias ssodemo -keyalg RSA -keysize 1024 -keypass 123456 -validity 365-keystore F:\Study\Java\Projects\SSO\Demo\keys\ssodemo.keystore -storepass123456
ps:
4.2.导出证书:
keytool-export -alias ssodemo -keystoreF:\Study\Java\Projects\SSO\Demo\keys\ssodemo.keystore -fileF:\Study\Java\Projects\SSO\Demo\keys\ssodemo.crt -storepass 123456
4.3.客户端导入证书:
keytool-import -keystore E:\Environment\java\Java1.6\jre\lib\security\cacerts -fileF:\Study\Java\Projects\SSO\Demo\keys\ssodemo.crt -alias ssodemo
ps:该命令中输入的密码和上面输入的不是同一个密码;如果是多台机器演示,需要在每一台客户端导入该证书。
有关keytool工具的详细运用见:http://www.micmiu.com/lang/java/keytool-start-guide/
5.1.配置HTTPS
解压apache-tomcat-6.0.29.tar.gz并重命名后的路径为F:\Study\Java\Projects\SSO\Demo\tomcat-cas,在文件 conf/server.xml文件找到:
<!--
<Connectorport="8443" protocol="HTTP/1.1" SSLEnabled="true"
maxThreads="150" scheme="https"secure="true"
clientAuth="false" sslProtocol="TLS" />
-->
修改成如下:
<Connectorport="8443"protocol="org.apache.coyote.http11.Http11Protocol"SSLEnabled="true"
maxThreads="150" scheme="https"secure="true"
keystoreFile="F:/Study/Java/Projects/SSO/Demo/keys/ssodemo.keystore"keystorePass="123456"
clientAuth="false" sslProtocol="TLS"URIEncoding="UTF-8"/>
参数说明:
5.2.验证HTTPS配置
其他按照默认配置不作修改,双击%TOMCAT_HOME%\bin\startup.bat启动tomcat-cas 验证https访问配置:
如果看到上述界面表示https访问配置成功。
5.3部署CAS-Server
CAS-Server下载地址:http://www.jasig.org/cas/download
本文以cas-server-3.4.11-release.zip为例,解压提取cas-server-3.4.11/modules/cas-server-webapp-3.4.11.war文件,把改文件copy到 G:\sso\tomcat-cas\webapps\目下,并重命名为:cas.war.
启动tomcat-cas,在浏览器地址栏输入:https://demo.tch.com:8443/cas/login ,回车
CAS-server的默认验证规则:只要用户名和密码相同就认证通过(仅仅用于测试,生成环境需要根据实际情况修改),输入admin/admin 点击登录,就可以看到登录成功的页面:
看到上述页面表示CAS-Server已经部署成功。
6.1Cas-Client下载
CAS-Client下载地址:http://downloads.jasig.org/cas-clients/
以cas-client-3.2.1-release.zip为例,解压提取cas-client-3.2.1/modules/cas-client-core-3.2.1.jar
借以tomcat默认自带的webapps\examples 作为演示的简单web项目
6.2 安装配置tomcat-app1
解压apache-tomcat-6.0.29.tar.gz并重命名后的路径为F:\Study\Java\Projects\SSO\Demo\tomcat-app1,修改tomcat的启动端口(共计5处),在文件conf/server.xml文件找到如下内容:
<Serverport="8005" shutdown="SHUTDOWN">
<Connectorport="8080" protocol="HTTP/1.1"
connectionTimeout="20000"
redirectPort="8443" />
<Connectorport="8009" protocol="AJP/1.3"redirectPort="8443" />
修改成如下:
<Serverport="18005" shutdown="SHUTDOWN">
<Connectorport="18080" protocol="HTTP/1.1"
connectionTimeout="20000"
redirectPort="18443" />
<Connectorport="18009" protocol="AJP/1.3"redirectPort="18443" />
启动tomcat-app1,浏览器输入http://app1.tch.com:18080/examples/servlets/回车:
看到上述界面表示tomcat-app1的基本安装配置已经成功。
接下来复制client的lib包cas-client-core-3.2.1.jar和commons-logging-1.1.jar到 tomcat-app1\webapps\examples\WEB-INF\lib\目录下,在tomcat-app1\webapps\examples\WEB-INF\web.xml 文件中增加如下内容:
<!-- ========================单点登录开始 ========================-->
<!--用于单点退出,该过滤器用于实现单点登出功能,可选配置-->
<listener>
<listener-class>org.jasig.cas.client.session.SingleSignOutHttpSessionListener</listener-class>
</listener>
<!--该过滤器用于实现单点登出功能,可选配置。-->
<filter>
<filter-name>CASSingle Sign OutFilter</filter-name>
<filter-class>org.jasig.cas.client.session.SingleSignOutFilter</filter-class>
</filter>
<filter-mapping>
<filter-name>CASSingle Sign Out Filter</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
<filter>
<filter-name>CASFilter</filter-name>
<filter-class>org.jasig.cas.client.authentication.AuthenticationFilter</filter-class>
<init-param>
<param-name>casServerLoginUrl</param-name>
<param-value>https://demo.micmiu.com:8443/cas/login</param-value>
</init-param>
<init-param>
<param-name>serverName</param-name>
<param-value>http://app1.micmiu.com:18080</param-value>
</init-param>
</filter>
<filter-mapping>
<filter-name>CASFilter</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
<!--该过滤器负责对Ticket的校验工作,必须启用它-->
<filter>
<filter-name>CASValidationFilter</filter-name>
<filter-class>
org.jasig.cas.client.validation.Cas20ProxyReceivingTicketValidationFilter</filter-class>
<init-param>
<param-name>casServerUrlPrefix</param-name>
<param-value>https://demo.micmiu.com:8443/cas</param-value>
</init-param>
<init-param>
<param-name>serverName</param-name>
<param-value>http://app1.micmiu.com:18080</param-value>
</init-param>
</filter>
<filter-mapping>
<filter-name>CASValidationFilter</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
<!--
该过滤器负责实现HttpServletRequest请求的包裹,
比如允许开发者通过HttpServletRequest的getRemoteUser()方法获得SSO登录用户的登录名,可选配置。
-->
<filter>
<filter-name>CASHttpServletRequest WrapperFilter</filter-name>
<filter-class>
org.jasig.cas.client.util.HttpServletRequestWrapperFilter</filter-class>
</filter>
<filter-mapping>
<filter-name>CASHttpServletRequest WrapperFilter</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
<!--
该过滤器使得开发者可以通过org.jasig.cas.client.util.AssertionHolder来获取用户的登录名。
比如AssertionHolder.getAssertion().getPrincipal().getName()。
-->
<filter>
<filter-name>CASAssertion Thread LocalFilter</filter-name>
<filter-class>org.jasig.cas.client.util.AssertionThreadLocalFilter</filter-class>
</filter>
<filter-mapping>
<filter-name>CASAssertion Thread LocalFilter</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
<!-- ========================单点登录结束 ======================== -->
有关cas-client的web.xml修改的详细说明见官网介绍:
https://wiki.jasig.org/display/CASC/Configuring+the+Jasig+CAS+Client+for+Java+in+the+web.xml
6.3 安装配置 tomcat-app2
解压apache-tomcat-6.0.29.tar.gz并重命名后的路径为F:\Study\Java\Projects\SSO\Demo\tomcat-app2,修改tomcat的启动端口,在文件conf/server.xml文件找到如下内容:
<Serverport="8005" shutdown="SHUTDOWN">
<Connectorport="8080" protocol="HTTP/1.1"
connectionTimeout="20000"
redirectPort="8443" />
<Connectorport="8009" protocol="AJP/1.3"redirectPort="8443" />
修改成如下:
<Server port="28005" shutdown="SHUTDOWN">
<Connector port="28080" protocol="HTTP/1.1"
connectionTimeout="20000"
redirectPort="28443"/>
<Connector port="28009" protocol="AJP/1.3" redirectPort="28443" />
启动tomcat-app2,浏览器输入http://app2.tch.com:28080/examples/servlets/回车,按照上述6.2中的方法验证是否成功。
同6.2中的复制client的lib包cas-client-core-3.2.1.jar和commons-logging-1.1.jar到 tomcat-app2\webapps\examples\WEB-INF\lib\目录下,在tomcat-app2\webapps\examples\WEB-INF\web.xml 文件中增加如下内容:
<!-- ========================单点登录开始 ========================-->
<!--用于单点退出,该过滤器用于实现单点登出功能,可选配置-->
<listener>
<listener-class>org.jasig.cas.client.session.SingleSignOutHttpSessionListener</listener-class>
</listener>
<!--该过滤器用于实现单点登出功能,可选配置。-->
<filter>
<filter-name>CASSingle Sign OutFilter</filter-name>
<filter-class>org.jasig.cas.client.session.SingleSignOutFilter</filter-class>
</filter>
<filter-mapping>
<filter-name>CASSingle Sign Out Filter</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
<filter>
<filter-name>CASFilter</filter-name>
<filter-class>org.jasig.cas.client.authentication.AuthenticationFilter</filter-class>
<init-param>
<param-name>casServerLoginUrl</param-name>
<param-value>https://demo.micmiu.com:8443/cas/login</param-value>
</init-param>
<init-param>
<param-name>serverName</param-name>
<param-value>http://app2.micmiu.com:28080</param-value>
</init-param>
</filter>
<filter-mapping>
<filter-name>CASFilter</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
<!--该过滤器负责对Ticket的校验工作,必须启用它-->
<filter>
<filter-name>CASValidationFilter</filter-name>
<filter-class>
org.jasig.cas.client.validation.Cas20ProxyReceivingTicketValidationFilter</filter-class>
<init-param>
<param-name>casServerUrlPrefix</param-name>
<param-value>https://demo.micmiu.com:8443/cas</param-value>
</init-param>
<init-param>
<param-name>serverName</param-name>
<param-value>http://app2.micmiu.com:28080</param-value>
</init-param>
</filter>
<filter-mapping>
<filter-name>CASValidationFilter</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
<!--
该过滤器负责实现HttpServletRequest请求的包裹,
比如允许开发者通过HttpServletRequest的getRemoteUser()方法获得SSO登录用户的登录名,可选配置。
-->
<filter>
<filter-name>CASHttpServletRequest WrapperFilter</filter-name>
<filter-class>
org.jasig.cas.client.util.HttpServletRequestWrapperFilter</filter-class>
</filter>
<filter-mapping>
<filter-name>CASHttpServletRequest WrapperFilter</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
<!--
该过滤器使得开发者可以通过org.jasig.cas.client.util.AssertionHolder来获取用户的登录名。
比如AssertionHolder.getAssertion().getPrincipal().getName()。
-->
<filter>
<filter-name>CASAssertion Thread LocalFilter</filter-name>
<filter-class>org.jasig.cas.client.util.AssertionThreadLocalFilter</filter-class>
</filter>
<filter-mapping>
<filter-name>CASAssertion Thread LocalFilter</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
<!-- ========================单点登录结束 ======================== -->
启动之前配置好的三个tomcat分别为:tomcat-cas、tomcat-app1、tomcat-app2.
7.1 基本的测试
预期流程:打开app1 url —->跳转cas server验证 —->显示app1的应用 —->打开app2 url —->显示app2应用 —->注销cas server —->打开app1/app2url —->重新跳转到cas server验证.
打开浏览器地址栏中输入:http://app1.tch.com:18080/examples/servlets/servlet/HelloWorldExample
验证通过后显示如下:
此时访问app2就不再需要验证:
地址栏中输入:https://demo.tch.com:8443/cas/logout,回车显示:
上述表示认证注销成功,此时如果再访问 : http://app1.micmiu.com:18080/examples/servlets/servlet/HelloWorldExample或 http://app2.micmiu.com:28080/examples/servlets/servlet/HelloWorldExample需要重新进行认证。
这里是源码下载http://download.csdn.net/detail/tcl_6666/6961265,欢迎互相交流,共同进步。