之前转载了一篇IBM的CAS单点登录实现,不过瘾,于是到官网弄下最新版本来再战一把:
这个CAS(Central Authentication Service)是耶鲁大学的开源项目,旨在实现企业应用单点登录,还是很不错的,牛b的大学确实不一样,不是我们这些2b学校式的教育。其官网http://www.jasig.org/cas,很不幸,应该翻了墙才能进去,自己去捣鼓*吧,建议就*足已。
直接下载包地址:http://downloads.jasig.org/
- 实验环境:
123456 | 1.jdk7_45 2.tomcat7_45 3.三台虚拟机: 1.tomcat1(部署cas验证服务器) 2.tomcat2(其中部署了两个web应用cas-web-client, cas-web-client2) 3.mysql server一台(直接到数据库种验证) |
- 原理图:
- 资源下载地址:
解压之,jar会再modules目录下,其他都为源代码项目
已经打包的server:
client:
------------------------------------------------------
开始搭建:
- CAS服务器配置:
1.在tomcat1所在机器生成证书:
这时会在用户主目录下生成.keystore文件,这个文件也可在上述命令种指定,其中生成过程会填入一些信息,注意输入第一个时(名字与姓氏)就输入你本机器的域名(不能时IP), 这里我的是www.tomcat1.com:
2.导出证书(后面将其导入客户端的jre环境中):
于是在用户主目录下就有了ssotest.crt证书文件(保留着,待会客户端配置要用),
3.配置Tomcat SSL: ${TOMCAT_HOME}/conf/server.xml中83-93行修改为:
12345678910 | <!-- Define a SSL HTTP/1.1 Connector on port 8443 This connector uses the JSSE configuration, when using APR, the connector should be using the OpenSSL style configuration described in the APR documentation --> <!-- configure ssl --> < Connector port = "8443" protocol = "HTTP/1.1" SSLEnabled = "true" maxThreads = "150" scheme = "https" secure = "true" clientAuth = "false" sslProtocol = "TLS" keystoreFile = "/home/tomcatadmin/.keystore" keystorePass = "ssotest" /> |
这时输入用户名及密码(保持一样就可以,默认CAS验证方式只要用户名密码一样就行), 可见其默认验证实现类SimpleTestUsernamePasswordAuthenticationHandler:
1234567891011121314 | public final class SimpleTestUsernamePasswordAuthenticationHandler extends AbstractUsernamePasswordAuthenticationHandler { public boolean authenticateUsernamePasswordInternal( final UsernamePasswordCredentials credentials) { final String username = credentials.getUsername(); final String password = credentials.getPassword(); if (StringUtils.hasText(username) && StringUtils.hasText(password) && username.equals(getPasswordEncoder().encode(password))) { //用户名及密码相同就成功 return true ; } return false ; } } |
这样CAS服务端就默认配置完毕了,待会儿我们还要配置数据库验证。
- 配置web客户端:
1.生成.keystore(同上);
2.将CAS服务端的导出ssotest.crt证书拷贝到某目录,并且导入到客户端机器的jre运行环境中:
12 | keytool - import -keystore $JAVA_HOME /jre/lib/security/cacerts - file ~ /ssotest .crt - alias ssotest # NOTE: 有可能会有异常:java.io.IOException: Keystore was tampered with, or password was incorrect. 那就先删除本机上述的cacerts文件。 |
3.配置客户端Tomcat SSL(同上);
4.新建WEB项目cas-web-client, 并加入依赖包:cas-client-core-3.2.1.jar,commons-logging-1.1.jar
5.配置web.xml:
12345678910111213141516171819202122232425262728293031323334353637383940414243444546474849505152535455565758596061626364656667686970 | <? xml version = "1.0" encoding = "UTF-8" ?> < web-app xmlns:xsi = "http://www.w3.org/2001/XMLSchema-instance" xmlns = "http://java.sun.com/xml/ns/javaee" xsi:schemaLocation = "http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" id = "WebApp_ID" version = "2.5" > < display-name >cas-web-client2</ display-name > < listener > < listener-class > org.jasig.cas.client.session.SingleSignOutHttpSessionListener </ listener-class > </ listener > < filter > < filter-name >CasSingleSignOutFilter</ filter-name > < filter-class >org.jasig.cas.client.session.SingleSignOutFilter</ filter-class > </ filter > < filter-mapping > < filter-name >CasSingleSignOutFilter</ 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 > <!-- Cas Server登录url--> < param-value >https://www.tomcat1.com:8443/cas/login</ param-value > </ init-param > < init-param > <!-- 配置当前web应用所在的web服务器域名url --> < param-name >serverName</ param-name > < param-value >http://www.tomcat2.com:8080</ param-value > </ init-param > </ filter > < filter-mapping > < filter-name >CASFilter</ filter-name > < url-pattern >/*</ url-pattern > </ filter-mapping > < filter > < filter-name >CasTicketFilter</ filter-name > < filter-class > org.jasig.cas.client.validation.Cas20ProxyReceivingTicketValidationFilter</ filter-class > < init-param > < param-name >casServerUrlPrefix</ param-name > < param-value >https://www.tomcat1.com:8443/cas</ param-value > </ init-param > < init-param > < param-name >serverName</ param-name > < param-value >http://www.tomcat2.com:8080</ param-value > </ init-param > </ filter > < filter-mapping > < filter-name >CasTicketFilter</ filter-name > < url-pattern >/*</ url-pattern > </ filter-mapping > < filter > < filter-name >CasRequestWrapFilter</ filter-name > < filter-class > org.jasig.cas.client.util.HttpServletRequestWrapperFilter</ filter-class > </ filter > < filter-mapping > < filter-name >CasRequestWrapFilter</ filter-name > < url-pattern >/*</ url-pattern > </ filter-mapping > < filter > < filter-name >AssertionThreadLocalFilter</ filter-name > < filter-class >org.jasig.cas.client.util.AssertionThreadLocalFilter</ filter-class > </ filter > < filter-mapping > < filter-name >AssertionThreadLocalFilter</ filter-name > < url-pattern >/*</ url-pattern > </ filter-mapping > < welcome-file-list > < welcome-file >index.jsp</ welcome-file > </ welcome-file-list > </ web-app > |
这样cas-web-client就完成了,拷贝一份为另一个web客户端cas-web-client2:
启动Cas Server所在tomcat(Tomcat1),再启动web客户端所在tomcat(Tomcat2),此时我们访问两个web客户端:
http://www.tomcat2.com:8080/cas-web-client/index.jsp
http://www.tomcat2.com:8080/cas-web-client2/index.jsp
都会被重定想到CAS Server登录界面,登录成功其中之一(将看到对应的index.jsp),再刷新另一个(也能看到对应的index.jsp了,因为已经登录过了), 这就算服务端和客户端都配置OK了。
------------------------------------------------------
- 现在就是要定制我们自己的验证方式(基于数据库验证):
1.新建WEB项目cas-auth-server,你需要将cas-server-webapp-3.5.2.war中的资源对应拷贝到项目中,再把下载包中cas-server-webapp的源码考到项目中,由于基于数据库验证,还得将cas-server-support-jdbc-3.5.2.jar和mysql-connector驱动包拷贝到WEB-INF/lib目录下,这样就构成了纯净的cas server项目,当然你也可以通过maven去构建,官网也有说明,如图:
2.我们要做的是修改一些配置,就是WEB-INF/deployerConfigContext.xml文件,先配置mysql数据源:
1234567 | <!-- DataSource,根据你的环境来定 --> < bean id = "mysqlDataSource" class = "org.apache.commons.dbcp.BasicDataSource" > < property name = "driverClassName" value = "com.mysql.jdbc.Driver" /> < property name = "url" value = "jdbc:mysql://192.168.141.129:3306/blog?useUnicode=true&characterEncoding=utf-8" /> < property name = "username" value = "mysqladmin" /> < property name = "password" value = "mysqladmin" /> </ bean > |
1234567891011121314 | < property name = "authenticationHandlers" > < list > < bean class = "org.jasig.cas.authentication.handler.support.HttpBasedServiceCredentialsAuthenticationHandler" p:httpClient-ref = "httpClient" /> <!--注释掉默认的的认证实现<bean class="org.jasig.cas.authentication.handler.support.SimpleTestUsernamePasswordAuthenticationHandler" />--> <!-- 数据库查询认证处理器 --> < bean class = "org.jasig.cas.adaptors.jdbc.QueryDatabaseAuthenticationHandler" > < property name = "dataSource" ref = "mysqlDataSource" /> < property name = "sql" value = "select password from t_user where username = ?" /> < property name = "passwordEncoder" ref = "myPasswordEncoder" ></ property > </ bean > </ list > </ property > |
12 | <!-- 自己定义的密码转译器,你可以自己定义,也可以用CAS提供的 --> < bean id = "myPasswordEncoder" class = "org.jasig.cas.custom.encoder.MyPasswordEncoder" /> |
这样就配置完成了,将项目导出war包,并部署到tomcat1所在机器上运行起来,效果会之前一样。