本次配置CAS耗时1周有余,从中学到了很多东西,现将这些东西整理一下分享出来,以供后来者借鉴。
起初接到这个任务,我就开始在网上搜资料,各种帖子来看,但是效果并不是很理想,因为帖子太多了,说法太多了,而且都不是很符合自己的实际项目情况。
其中关于配置这一块我不得不提一下这个帖子,http://www.kafeitu.me/sso/2010/11/05/sso-cas-full-course.html
说得很详细,也很全面,只要不是太粗心,都能够一次通过cas的配置。
首先,这个帖子是在你对CAS有一定的了解了之后才能看懂。
大致说一下,我的项目环境,分为两个子项目,一个是php,一个是java。
PHP需要下载phpCas,https://wiki.jasig.org/display/CASC/phpCAS
java需要下载cas-client,https://wiki.jasig.org/display/CASC/CAS+Client+for+Java+3.1,
至于配置的细节,官网比我所见到的帖子都更加详尽,所以可以参考官网https://wiki.jasig.org。
TGT:ticket granting ticket 在用户在CAS认证成功后,CAS生成cookie,写入浏览器,同时生成一个TGT对象,放入自己的缓存,TGT对象的ID就是cookie的值。当HTTP再次请求到来时,如果传过来的有CAS生成的cookie,则CAS以此cookie值为key查询缓存中有无TGT ,如果有的话,则说明用户之前登录过,如果没有,则用户需要重新登录。
ST:service ticket ST是CAS为用户签发的访问某一service的票据。用户访问service时,service发现用户没有ST,则要求用户去CAS获取ST。用户向CAS发出获取ST的请求,如果用户的请求中包含cookie,则CAS会以此cookie值为key查询缓存中有无TGT,如果存在TGT,则用此TGT签发一个ST,返回给用户。用户凭借ST去访问service,service拿ST去CAS验证,验证通过后,允许用户访问资源。
ST的使用次数(默认一次)和过期时间,TGT的过期时间在cas\WEB-INF\spring-configuration\ticketExpirationPolicies.xml里面设置。
下面是我在本次配置的过程中出现的问题及其解决方法:
1.在配置php客户端的时候,Fatal error: Call to undefined function curl_init() in D:\MYOA\webroot\CAS\Request\CurlRequest.php on line 105
解决办法:添加php_curl模块,打开php.ini的注释,然后下载相应版本的php_curl.dll及其依赖的动态链接库ssleay32.dll和libeay32.dll。
2.去掉https的认证协议,使用http协议进行认证和ticket的传输
解决方法:在cas\WEB-INF\deployConfig.xml里面将
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< bean class = "org.jasig.cas.authentication.handler.support.HttpBasedServiceCredentialsAuthenticationHandler" |
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p:httpClient-ref = "httpClient" /> |
添加一个属性
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< bean class = "org.jasig.cas.authentication.handler.support.HttpBasedServiceCredentialsAuthenticationHandler" |
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p:httpClient-ref = "httpClient" p:requireSecure = "false" /> |
还有一个地方,cas\WEB-INF\spring-configuration\ticketGrantingTicketCookieGenerator.xml
修改成,
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< bean id = "ticketGrantingTicketCookieGenerator" class = "org.jasig.cas.web.support.CookieRetrievingCookieGenerator" |
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p:cookieSecure = "false" //使用http进行cookie传输 |
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p:cookieMaxAge = "3600" |
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p:cookieName = "CASTGC" |
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p:cookiePath = "/cas" /> |
另外,web.xml里面的casServerLoginUrl需要修改成http协议
3.在cas中使用jasypt查看认证的用户名密码是否正确
解决方法:在deployConfig.xml里面修改默认的认证方法(默认的认证方式是,用户名密码相同即通过认证),
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< bean class = "org.jasig.cas.adaptors.jdbc.QueryDatabaseAuthenticationHandler" > |
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< property name = "dataSource" ref = "casDataSource" /> |
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< property name = "sql" value = "select SYS_USER.SU_PASSWORD from SYS_USER where lower(SYS_USER.SU_NICKNAME_CODE)=lower(?)" /> |
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</ bean > |
使用上面这一段替换SimpleTestUsernamePasswordAuthenticationHandler,然后在配置文件中加入下面的数据源即可。
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< bean id = "casDataSource" class = "org.apache.commons.dbcp.BasicDataSource" > |
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< property name = "driverClassName" > |
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< value >oracle.jdbc.driver.OracleDriver</ value > |
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</ property > |
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< property name = "url" > |
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< value >jdbc:oracle:thin:@192.168.0.141:1521:xe</ value > |
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</ property > |
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< property name = "username" > |
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< value >em_mip</ value > |
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</ property > |
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< property name = "password" > |
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< value >mip00</ value > |
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</ property > |
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</ bean > |
然后,下载cas-server-support-jdbc.jar的源码,进行修改,下载链接http://grepcode.com/snapshot/repo1.maven.org/maven2/org.jasig.cas/cas-server-support-jdbc/3.3.5
解压,导入到eclipse,修改QueryDatabaseAuthenticationHandler,修改后的代码如下:
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/* |
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* Copyright 2007 The JA-SIG Collaborative. All rights reserved. See license |
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* distributed with this file and available online at |
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* http://www.ja-sig.org/products/cas/overview/license/ |
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*/ |
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package org.jasig.cas.adaptors.jdbc; |
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import org.jasig.cas.authentication.handler.AuthenticationException; |
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import org.jasig.cas.authentication.principal.UsernamePasswordCredentials; |
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import org.jasypt.util.password.BasicPasswordEncryptor; |
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import org.springframework.dao.IncorrectResultSizeDataAccessException; |
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/** |
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* Class that if provided a query that returns a password (parameter of query |
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* must be username) will compare that password to a translated version of the |
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* password provided by the user. If they match, then authentication succeeds. |
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* Default password translator is plaintext translator. |
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* |
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* @author Scott Battaglia |
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* @author Dmitriy Kopylenko |
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* @version $Revision: 42776 $ $Date: 2008-01-04 09:15:42 -0500 (Fri, 04 Jan 2008) $ |
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* @since 3.0 |
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*/ |
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public final class QueryDatabaseAuthenticationHandler extends |
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AbstractJdbcUsernamePasswordAuthenticationHandler { |
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private String sql; |
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protected final boolean authenticateUsernamePasswordInternal( |
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final UsernamePasswordCredentials credentials) |
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throws AuthenticationException { |
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final String username = credentials.getUsername(); |
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final String password = credentials.getPassword(); |
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try { |
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final String dbPassword = getJdbcTemplate().queryForObject( |
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this.sql, String.class, username); |
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return new BasicPasswordEncryptor().checkPassword(password, dbPassword);//主要是修改了这里 |
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} catch (final IncorrectResultSizeDataAccessException e) { |
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// this means the username was not found. |
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return false; |
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} |
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} |
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/** |
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* @param sql The sql to set. |
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*/ |
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public void setSql( final String sql) { |
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this .sql = sql; |
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} |
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} |
然后,把各种依赖包导到build path里面去,让项目不报错。
打成jar包,放到cas server 的lib目录下面去即可。
4.修改登录界面和登录成功的界面
解决方法:cas\WEB-INF\view\jsp\default\ui
更改:casLoginView.jsp和casGenericSuccess.jsp
登录界面需要自己去套,form表单里面有些东西是不能更改的,否则会出现不能认证的情况。值得一提的是页面的外部css或者图片是放在cas\css和cas\images下面的。贴上我的页面以供大家参考:
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<%@ taglib prefix="fn" uri="http://java.sun.com/jsp/jstl/functions" %> |
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<%@ taglib prefix="form" uri="http://www.springframework.org/tags/form" %> |
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<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %> |
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<%@ page contentType="text/html; charset=UTF-8" %> |
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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> |
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< html xmlns = "http://www.w3.org/1999/xhtml" > |
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< head > |
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< meta http-equiv = "Content-Type" content = "text/html; charset=UTF-8" /> |
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< title >EIP登录页面</ title > |
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< style type = "text/css" > |
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* { padding:0; margin:0;} |
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.eip-login{ width: 950px; height:700px; margin:auto;background:url(images/eip_login_bg.jpg) no-repeat;} |
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.eip-login-form { padding-left:684px;padding-top:353px;} |
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.eip-login-form input { border:0 none;} |
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.eip-login-box p { position: relative;margin-top: 10px;*margin-top:7px;margin-left: 30px;} |
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.eip-position-box { height:28px;line-height: 28px;width: 170px;color:gray; position:absolute;z-index:88;top:0;left:0px;font-size: 12px;display: inline-block;padding-left: 10px;cursor: text;} |
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.eip-username, .eip-password{ height: 22px; padding: 3px; line-height: 22px; width:170px;background:#f3f3f3;padding-left: 10px;} |
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.eip-submit { width:229px;height:47px;background:url(images/eip_login.png) no-repeat;margin-top: 15px;cursor: pointer;} |
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.eip-reset { margin-left:180px;cursor:pointer;background:#fff;} |
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</ style > |
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< script type = "text/javascript" src = "js/jquery-1.72.js" ></ script > |
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< script type = "text/javascript" > |
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$(function(){ |
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$(".eip-username").focus(function(){ |
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var username = $(".eip-username").val(); |
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if( username == '请填写EIP系统帐号(或花名)'){ |
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$(this).val(''); |
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} |
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}); |
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$(".eip-username").blur(function(){ |
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var username = $(".eip-username").val(); |
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if( username == ' '){ |
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$(this).val('请填写EIP系统帐号(或花名)'); |
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} |
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}); |
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$(".eip-reset").click(function(){ |
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$("#editForm").reset(); |
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}); |
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}); |
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</ script > |
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</ head > |
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< body > |
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|
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< form:form method = "post" commandName = "${commandName}" htmlEscape = "true" id = "edit-form" > |
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< div class = "eip-login" > |
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< div class = "eip-login-form" > |
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< div class = "eip-login-box" > |
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< p > |
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< c:if test = "${not empty sessionScope.openIdLocalId}" > |
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< strong >${sessionScope.openIdLocalId}</ strong > |
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< input type = "hidden" id = "username" name = "username" value = "${sessionScope.openIdLocalId}" /> |
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</ c:if > |
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< c:if test = "${empty sessionScope.openIdLocalId}" > |
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< form:input class = "eip-username" cssErrorClass = "error" id = "username" value = "请填写EIP系统帐号(或花名)" size = "25" tabindex = "1" accesskey = "${userNameAccessKey}" path = "username" autocomplete = "false" htmlEscape = "true" /> |
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</ c:if > |
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</ p > |
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< p > |
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< form:password class = "eip-password" cssErrorClass = "error" id = "password" size = "25" tabindex = "2" path = "password" accesskey = "${passwordAccessKey}" htmlEscape = "true" autocomplete = "off" /> |
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</ p > |
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< input type = "hidden" name = "lt" value = "${flowExecutionKey}" /> |
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< input type = "hidden" name = "_eventId" value = "submit" /> |
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< div >< input class = "eip-submit" name = "submit" accesskey = "l" value = "" tabindex = "4" type = "submit" /></ div > |
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< div >< input class = "eip-reset" name = "reset" accesskey = "c" value = "重置" tabindex = "5" type = "reset" /></ div > |
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</ div > |
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</ div > |
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</ div > |
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</ form:form > |
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</ body > |
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</ html > |
回头一看,其实整个配置也没多难,可是其中的过程却是曲折离奇。
如果大家有什么疑问可以留言,能够帮助解决的我会尽量解答的。