转:http://blog.****.net/yunye114105/article/details/7997041
背景
使用步骤
第一步 部署CAS系统服务端
- <bean id="ticketGrantingTicketCookieGenerator" class="org.jasig.cas.web.support.CookieRetrievingCookieGenerator"
- p:cookieSecure="false"
- p:cookieMaxAge="-1"
- p:cookieName="CASTGC"
- p:cookiePath="/cas" />
3.配置登录的验证逻辑, 修改配置文件cas\WEB-INF\deployerConfigContext.xml。在authenticationHandlers中配置验证方式,我这里配置数据库查询语句来实现用户名和密码的验证。
- <property name="authenticationHandlers">
- <list>
- <!--
- | This is the authentication handler that authenticates services by means of callback via SSL, thereby validating
- | a server side SSL certificate.
- +-->
- <bean class="org.jasig.cas.authentication.handler.support.HttpBasedServiceCredentialsAuthenticationHandler"
- p:httpClient-ref="httpClient" />
- <!--
- | 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" /> -->
- <bean class="org.jasig.cas.adaptors.jdbc.QueryDatabaseAuthenticationHandler">
- <property name="sql" value="select password from userTable where userName=?" />
- <property name="passwordEncoder" ref="passwordEncoder"/>
- <property name="dataSource" ref="dataSource" />
- </bean>
- </list>
- </property>
密码加密方法我这里使用MD5, 配置passwordEncoder的bean
- <bean id="passwordEncoder" class="org.jasig.cas.authentication.handler.DefaultPasswordEncoder" autowire="byName">
- <constructor-arg value="MD5"/>
- </bean>
在配置一个名称为dataSource的数据源
- <bean id="dataSource" class="org.logicalcobwebs.proxool.ProxoolDataSource">
- <property name="driver" value="com.microsoft.sqlserver.jdbc.SQLServerDriver"></property>
- <property name="driverUrl" value="jdbc:sqlserver://localhost:1433;databaseName=testDB;"></property>
- <property name="user" value="sa"></property>
- <property name="password" value="123456"></property>
- <property name="maximumConnectionCount" value="100"></property>
- <property name="minimumConnectionCount" value="1"></property>
- </bean>
数据源的配置根据自己的实际情况来配置, 需要的jar如果lib下面没有,自己复制进去, 不然数据源连不上报错。
第二步 客户端web应用程序集成CAS
- <!-- CAS 单点登录(SSO) 过滤器配置 (start) -->
- <!-- 该过滤器用于实现单点登出功能。-->
- <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>
- <!-- CAS: 用于单点退出 -->
- <listener>
- <listener-class>org.jasig.cas.client.session.SingleSignOutHttpSessionListener</listener-class>
- </listener>
- <!-- 该过滤器负责用户的认证工作,必须启用它 -->
- <filter>
- <filter-name>CASFilter</filter-name>
- <filter-class>org.jasig.cas.client.authentication.AuthenticationFilter</filter-class>
- <init-param>
- <param-name>casServerLoginUrl</param-name>
- <!-- 下面的URL是Cas服务器的登录地址 -->
- <param-value>http://CAS服务端所在服务器IP:8080/cas/login</param-value>
- </init-param>
- <init-param>
- <param-name>serverName</param-name>
- <!-- 下面的URL是具体某一个应用的访问地址 -->
- <param-value>http://具体web应用程序所在服务器IP:8080</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>CAS Validation Filter</filter-name>
- <filter-class>org.jasig.cas.client.validation.Cas20ProxyReceivingTicketValidationFilter</filter-class>
- <init-param>
- <param-name>casServerUrlPrefix</param-name>
- <!-- 下面的URL是Cas服务器的认证地址 -->
- <param-value>http://CAS服务端所在服务器IP:8080/cas</param-value>
- </init-param>
- <init-param>
- <param-name>serverName</param-name>
- <!-- 下面的URL是具体某一个应用的访问地址 -->
- <param-value>http://具体web应用程序所在服务器IP:8080</param-value>
- </init-param>
- <init-param>
- <param-name>renew</param-name>
- <param-value>false</param-value>
- </init-param>
- <init-param>
- <param-name>gateway</param-name>
- <param-value>false</param-value>
- </init-param>
- </filter>
- <filter-mapping>
- <filter-name>CAS Validation Filter</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>CAS HttpServletRequest Wrapper Filter</filter-name>
- <filter-class>org.jasig.cas.client.util.HttpServletRequestWrapperFilter</filter-class>
- </filter>
- <filter-mapping>
- <filter-name>CAS HttpServletRequest Wrapper Filter</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>CAS Assertion Thread Local Filter</filter-name>
- <filter-class>org.jasig.cas.client.util.AssertionThreadLocalFilter</filter-class>
- </filter>
- <filter-mapping>
- <filter-name>CAS Assertion Thread Local Filter</filter-name>
- <url-pattern>/*</url-pattern>
- </filter-mapping>
- <!-- 自动根据单点登录的结果设置本系统的用户信息(具体某一个应用实现) -->
- <filter>
- <filter-name>CasForInvokeContextFilter</filter-name>
- <filter-class>com.cm.demo.filter.CasForInvokeContextFilter</filter-class>
- <init-param>
- <param-name>appId</param-name>
- <param-value>a5ea611bbff7474a81753697a1714fb0</param-value>
- </init-param>
- </filter>
- <filter-mapping>
- <filter-name>CasForInvokeContextFilter</filter-name>
- <url-pattern>/*</url-pattern>
- </filter-mapping>
- <!-- CAS 单点登录(SSO) 过滤器配置 (end) -->
4. 注意上步配置文件中,过滤器CasForInvokeContextFilter的实现是需要在具体的应用中实现的,他的目的是, CAS服务端登录验证成功后,会将登录用户的用户名携带回来, 这时客户端web应用程序需要根据用户名从数据库用户表中查询到用户的Id等信息, 并填充到Session中, 这样,客户端应用程序原来的验证逻辑就不会出问题了, 因为我们一般都是通过验证session中是否含有当前登录的用户的ID来进行登录验证的。
- /**
- * 该过滤器用户从CAS认证服务器中获取登录用户用户名,并填充必要的Session.
- * @author jiarong_cheng
- * @created 2012-7-12
- */
- public class CasForInvokeContextFilter implements Filter {
- @Override
- public void destroy() {
- }
- @Override
- public void doFilter(ServletRequest request, ServletResponse response,
- FilterChain chain) throws IOException, ServletException {
- HttpSession session = ((HttpServletRequest) request).getSession();
- //如果session中没有用户信息,则填充用户信息
- if (session.getAttribute("j_userId") == null) {
- //从Cas服务器获取登录账户的用户名
- Assertion assertion = AssertionHolder.getAssertion();
- String userName = assertion.getPrincipal().getName();
- try {
- //根据单点登录的账户的用户名,从数据库用户表查找用户信息, 填充到session中
- User user = UserDao.getUserByName(userName);
- session.setAttribute("username", userName);
- session.setAttribute("userId", user.getId());
- } catch (Exception e) {
- e.printStackTrace();
- }
- }
- chain.doFilter(request, response);
- }
- @Override
- public void init(FilterConfig config) throws ServletException {
- }
- }
到此,就完成了, 当你访问具体应用的网址, 如http://具体应用IP: 8080/ ,就会跳转到CAS服务器的登陆页面: http://CAS服务器IP: 8080/ 进行登录验证, 验证通过后, 又会跳转回应用的网址。
第三步 单点登出
http://CAS服务器IP:8080/cas/logout