单点登录（SSO）解决方案之 CAS服务端数据源设置及页面改造

接上篇 单点登录（SSO）解决方案之 CAS 入门案例

服务端数据源设置：

开发中，我们登录的user信息都是存在数据库中的，下面说一下如何让用户名密码从我们的数据库表中做验证。

案例中我最终把cas的tomcat放在了192.168.44.31这一台虚拟机上，我的mysql数据库也在这个服务器上，里面有一个test数据库，其中有一张tb_user表：

两个用户，密码都是md5加密的123456。

下面我们修改配置数据源的配置：

1，修改cas服务端中web-inf下deployerConfigContext.xml ，添加如下配置（数据库设置及使用c3p0，密码MD5加密及账号密码的sql设置）

<bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource"
      p:driverClass="com.mysql.jdbc.Driver"
      p:jdbcUrl="jdbc:mysql://127.0.0.1:3306/test?characterEncoding=utf8"
      p:user="root"
      p:password="root" />
<bean id="passwordEncoder"
      class="org.jasig.cas.authentication.handler.DefaultPasswordEncoder"
      c:encodingAlgorithm="MD5"
      p:characterEncoding="UTF-8" />
<bean id="dbAuthHandler"
      class="org.jasig.cas.adaptors.jdbc.QueryDatabaseAuthenticationHandler"
      p:dataSource-ref="dataSource"
      p:sql="select password from tb_user where username = ?"
      p:passwordEncoder-ref="passwordEncoder"/> 

然后在配置文件开始部分找到如下配置

<bean id="authenticationManager" class="org.jasig.cas.authentication.PolicyBasedAuthenticationManager">
    <constructor-arg>
        <map>
            <entry key-ref="proxyAuthenticationHandler" value-ref="proxyPrincipalResolver" />
            <entry key-ref="primaryAuthenticationHandler" value-ref="primaryPrincipalResolver" />
        </map>
    </constructor-arg>
    <property name="authenticationPolicy">
        <bean class="org.jasig.cas.authentication.AnyAuthenticationPolicy" />
    </property>
</bean>

把其中的这一行：

 <entry key-ref="primaryAuthenticationHandler" value-ref="primaryPrincipalResolver" />

修改为：

<entry key-ref="dbAuthHandler" value-ref="primaryPrincipalResolver"/>

最终这个文件的内容：

<?xml version="1.0" encoding="UTF-8"?>
<!--

    Licensed to Jasig under one or more contributor license
    agreements. See the NOTICE file distributed with this work
    for additional information regarding copyright ownership.
    Jasig licenses this file to you under the Apache License,
    Version 2.0 (the "License"); you may not use this file
    except in compliance with the License.  You may obtain a
    copy of the License at the following location:

      http://www.apache.org/licenses/LICENSE-2.0

    Unless required by applicable law or agreed to in writing,
    software distributed under the License is distributed on an
    "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
    KIND, either express or implied.  See the License for the
    specific language governing permissions and limitations
    under the License.

-->
<!--
| deployerConfigContext.xml centralizes into one file some of the declarative configuration that
| all CAS deployers will need to modify.
|
| This file declares some of the Spring-managed JavaBeans that make up a CAS deployment.
| The beans declared in this file are instantiated at context initialization time by the Spring
| ContextLoaderListener declared in web.xml.  It finds this file because this
| file is among those declared in the context parameter "contextConfigLocation".
|
| By far the most common change you will need to make in this file is to change the last bean
| declaration to replace the default authentication handler with
| one implementing your approach for authenticating usernames and passwords.
+-->

<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xmlns:p="http://www.springframework.org/schema/p"
       xmlns:c="http://www.springframework.org/schema/c"
       xmlns:tx="http://www.springframework.org/schema/tx"
       xmlns:util="http://www.springframework.org/schema/util"
       xmlns:sec="http://www.springframework.org/schema/security"
       xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.2.xsd
       http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.2.xsd
       http://www.springframework.org/schema/security http://www.springframework.org/schema/security/spring-security-3.2.xsd
       http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util.xsd">

    <!--
       | The authentication manager defines security policy for authentication by specifying at a minimum
       | the authentication handlers that will be used to authenticate credential. While the AuthenticationManager
       | interface supports plugging in another implementation, the default PolicyBasedAuthenticationManager should
       | be sufficient in most cases.
       +-->
    <bean id="authenticationManager" class="org.jasig.cas.authentication.PolicyBasedAuthenticationManager">
        <constructor-arg>
            <map>
                <!--
                   | IMPORTANT
                   | Every handler requires a unique name.
                   | If more than one instance of the same handler class is configured, you must explicitly
                   | set its name to something other than its default name (typically the simple class name).
                   -->
                <entry key-ref="proxyAuthenticationHandler" value-ref="proxyPrincipalResolver" />
                <entry key-ref="dbAuthHandler" value-ref="primaryPrincipalResolver" />
            </map>
        </constructor-arg>

        <!-- Uncomment the metadata populator to allow clearpass to capture and cache the password
             This switch effectively will turn on clearpass.
        <property name="authenticationMetaDataPopulators">
           <util:list>
              <bean class="org.jasig.cas.extension.clearpass.CacheCredentialsMetaDataPopulator"
                    c:credentialCache-ref="encryptedMap" />
           </util:list>
        </property>
        -->

        <!--
           | Defines the security policy around authentication. Some alternative policies that ship with CAS:
           |
           | * NotPreventedAuthenticationPolicy - all credential must either pass or fail authentication
           | * AllAuthenticationPolicy - all presented credential must be authenticated successfully
           | * RequiredHandlerAuthenticationPolicy - specifies a handler that must authenticate its credential to pass
           -->
        <property name="authenticationPolicy">
            <bean class="org.jasig.cas.authentication.AnyAuthenticationPolicy" />
        </property>
    </bean>

    <!-- Required for proxy ticket mechanism. -->
    <bean id="proxyAuthenticationHandler"
          class="org.jasig.cas.authentication.handler.support.HttpBasedServiceCredentialsAuthenticationHandler"
          p:httpClient-ref="httpClient" p:requireSecure="false"/>

    <!--
       | TODO: Replace this component with one suitable for your enviroment.
       |
       | This component provides authentication for the kind of credential used in your environment. In most cases
       | credential is a username/password pair that lives in a system of record like an LDAP directory.
       | The most common authentication handler beans:
       |
       | * org.jasig.cas.authentication.LdapAuthenticationHandler
       | * org.jasig.cas.adaptors.jdbc.QueryDatabaseAuthenticationHandler
       | * org.jasig.cas.adaptors.x509.authentication.handler.support.X509CredentialsAuthenticationHandler
       | * org.jasig.cas.support.spnego.authentication.handler.support.JCIFSSpnegoAuthenticationHandler
       -->
    <bean id="primaryAuthenticationHandler"
          class="org.jasig.cas.authentication.AcceptUsersAuthenticationHandler">
        <property name="users">
            <map>
                <entry key="casuser" value="Mellon"/>
                <entry key="root" value="root"/>
            </map>
        </property>
    </bean>
    <bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource"
              p:driverClass="com.mysql.jdbc.Driver"
              p:jdbcUrl="jdbc:mysql://127.0.0.1:3306/test?characterEncoding=utf8"
              p:user="root"
              p:password="root" />
    <bean id="passwordEncoder"
            class="org.jasig.cas.authentication.handler.DefaultPasswordEncoder"
        c:encodingAlgorithm="MD5"
        p:characterEncoding="UTF-8" />
    <bean id="dbAuthHandler"
          class="org.jasig.cas.adaptors.jdbc.QueryDatabaseAuthenticationHandler"
          p:dataSource-ref="dataSource"
          p:sql="select password from tb_user where username = ?"
          p:passwordEncoder-ref="passwordEncoder"/>  

    <!-- Required for proxy ticket mechanism -->
    <bean id="proxyPrincipalResolver"
          class="org.jasig.cas.authentication.principal.BasicPrincipalResolver" />

    <!--
       | Resolves a principal from a credential using an attribute repository that is configured to resolve
       | against a deployer-specific store (e.g. LDAP).
       -->
    <bean id="primaryPrincipalResolver"
          class="org.jasig.cas.authentication.principal.PersonDirectoryPrincipalResolver" >
        <property name="attributeRepository" ref="attributeRepository" />
    </bean>

    <!--
    Bean that defines the attributes that a service may return.  This example uses the Stub/Mock version.  A real implementation
    may go against a database or LDAP server.  The id should remain "attributeRepository" though.
    +-->
    <bean id="attributeRepository" class="org.jasig.services.persondir.support.StubPersonAttributeDao"
            p:backingMap-ref="attrRepoBackingMap" />

    <util:map id="attrRepoBackingMap">
        <entry key="uid" value="uid" />
        <entry key="eduPersonAffiliation" value="eduPersonAffiliation" />
        <entry key="groupMembership" value="groupMembership" />
    </util:map>

    <!--
    Sample, in-memory data store for the ServiceRegistry. A real implementation
    would probably want to replace this with the JPA-backed ServiceRegistry DAO
    The name of this bean should remain "serviceRegistryDao".
    +-->
    <bean id="serviceRegistryDao" class="org.jasig.cas.services.InMemoryServiceRegistryDaoImpl"
            p:registeredServices-ref="registeredServicesList" />

    <util:list id="registeredServicesList">
        <bean class="org.jasig.cas.services.RegexRegisteredService"
              p:id="0" p:name="HTTP and IMAP" p:description="Allows HTTP(S) and IMAP(S) protocols"
              p:serviceId="^(https?|imaps?)://.*" p:evaluationOrder="10000001" />
        <!--
        Use the following definition instead of the above to further restrict access
        to services within your domain (including sub domains).
        Note that example.com must be replaced with the domain you wish to permit.
        This example also demonstrates the configuration of an attribute filter
        that only allows for attributes whose length is 3.
        -->
        <!--
        <bean class="org.jasig.cas.services.RegexRegisteredService">
            <property name="id" value="1" />
            <property name="name" value="HTTP and IMAP on example.com" />
            <property name="description" value="Allows HTTP(S) and IMAP(S) protocols on example.com" />
            <property name="serviceId" value="^(https?|imaps?)://([A-Za-z0-9_-]+\.)*example\.com/.*" />
            <property name="evaluationOrder" value="0" />
            <property name="attributeFilter">
              <bean class="org.jasig.cas.services.support.RegisteredServiceRegexAttributeFilter" c:regex="^\w{3}$" />
            </property>
        </bean>
        -->
    </util:list>

    <bean id="auditTrailManager" class="com.github.inspektr.audit.support.Slf4jLoggingAuditTrailManager" />

    <bean id="healthCheckMonitor" class="org.jasig.cas.monitor.HealthCheckMonitor" p:monitors-ref="monitorsList" />

    <util:list id="monitorsList">
      <bean class="org.jasig.cas.monitor.MemoryMonitor" p:freeMemoryWarnThreshold="10" />
      <!--
        NOTE
        The following ticket registries support SessionMonitor:
          * DefaultTicketRegistry
          * JpaTicketRegistry
        Remove this monitor if you use an unsupported registry.
      -->
      <bean class="org.jasig.cas.monitor.SessionMonitor"
          p:ticketRegistry-ref="ticketRegistry"
          p:serviceTicketCountWarnThreshold="5000"
          p:sessionCountWarnThreshold="100000" />
    </util:list>
</beans>

由于我们修改成了从mysql中验证，所以需要添加三个jar包：

将以下三个jar包放入webapps\cas\WEB-INF\lib下：

c3p0-0.9.1.2.jar
cas-server-support-jdbc-4.0.0.jar
mysql-connector-java-5.1.32.jar

以上我们就完成了从mysql中验证的操作，请自行测试。

CAS服务端登录界面改造：

上一篇我们也看到了，cas的登录页面很丑，所以我们下面把登录页面换成我们自己的登录页面。

首先是拷贝资源：

1，首先将我们自己登录页面所需的login.html拷贝到cas下WEB-INF\view\jsp\default\ui 目录下

2，将登录页面需要的js，css，img等目录放到cas目录下

3，将原来的casLoginView.jsp 改名（可以为之后的修改操作做参照），将login.html改名为casLoginView.jsp，也就是将cas原本的登录页面替换为我们自己的

其次是修改页面：

编辑我们的新登录页面casLoginView.jsp（可参照之前的登录页面）：

添加指令：

<%@ page pageEncoding="UTF-8" %>
<%@ page contentType="text/html; charset=UTF-8" %>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<%@ taglib prefix="spring" uri="http://www.springframework.org/tags" %>
<%@ taglib prefix="form" uri="http://www.springframework.org/tags/form" %>
<%@ taglib prefix="fn" uri="http://java.sun.com/jsp/jstl/functions" %>

修改form标签：

<form:form method="post" id="fm1" commandName="${commandName}" htmlEscape="true" class="自己页面的样式">
    ......
</form:form>

修改用户名框：

<form:input placeholder="邮箱/用户名/手机号" class="span2 input-xfat" id="username" size="25" tabindex="1" accesskey="${userNameAccessKey}" path="username" autocomplete="off" htmlEscape="true" />

修改密码框：

<form:password placeholder="请输入密码" class="span2 input-xfat" id="password" size="25" tabindex="2" path="password"  accesskey="${passwordAccessKey}" htmlEscape="true" autocomplete="off" />

修改登录按钮：

<input type="hidden" name="lt" value="${loginTicket}" />
<input type="hidden" name="execution" value="${flowExecutionKey}" />
<input type="hidden" name="_eventId" value="submit" />

<input class="sui-btn btn-block btn-xlarge btn-danger" name="submit" accesskey="l" value="登&nbsp;&nbsp;录" tabindex="4" type="submit" />

错误提示：

登录失败后需要提示，在你自己的登录页面错误提示的位置将错误提示替换为：

<form:errors path="*" id="msg" cssClass="errors" element="div" htmlEscape="false" />

这个错误提示默认是英文的，在WEB-INF\classes目录下的messages.properties文件中

authenticationFailure.AccountNotFoundException=Invalid credentials.
authenticationFailure.FailedLoginException=Invalid credentials.

我们需要修改成中文，并编辑自己的错误提示信息：

首先，设置国际化为zn_CN ,修改cas-servlet.xml：

<bean id="localeResolver" class="org.springframework.web.servlet.i18n.CookieLocaleResolver" p:defaultLocale="zh_CN" />

然后，修改messages_zh_CN.properties文件，在其末尾加上：（第一个是用户名不存在时的错误提示，第二个是密码错误的提示）

authenticationFailure.AccountNotFoundException=\u7528\u6237\u4E0D\u5B58\u5728.
authenticationFailure.FailedLoginException=\u5BC6\u7801\u9519\u8BEF.

可以看出这个文件中是没有中文的，所以我们的中文提示需要转成Unicode，替换上面绿色的部分即可。

这时候可以把cas所在的tomcat放到虚拟机上运行了。

到此，我们的单点登录解决方案之 CAS 暂时告一段落。

下一篇：单点登录（SSO）解决方案之 CAS客户端与Spring Security集成

后续补充：Demo及所需资料百度云地址：链接：https://pan.baidu.com/s/1Dr4Aq9-FWGnL3kRCZ3uwVA 密码：0i30