Central Authentication Service

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http://docs.jboss.com/jbportal/v2.7.1/referenceGuide/html/sso.html#d0e11667

21.3. CAS - Central Authentication Service

This Single Sign On plugin enables seamless integration between JBoss Portal and the CAS Single Sign On Framework. Details about CAS can be found here

21.3.1. Integration steps

Note

The steps below assume that CAS server and JBoss Portal will be deployed on the same JBoss Application Server instance. CAS will be configured to leverage identity services exposed by JBoss Portal to perform authentication. Procedure may be slightly different for other deployment scenarios. Both JBoss Portal and CAS will need to be configured to authenticate against same database or LDAP server. Please see CAS documentation to learn how to setup it up against proper identity store.

Note

Configuration below assumes that JBoss Application Server is HTTPS enabled and operates on standard ports: 80 (for HTTP) and 443 (for HTTPS).

1. Install CAS server (v 3.0.7). This should be as simple as deploying single cas.war file.
2. Copy portal-identity-lib.jar and portal-identity-sso-lib.jar files from$JBOSS_HOME/server/default/deploy/jboss-portal.sar/lib to$JBOSS_HOME/server/default/deploy/cas.war/WEB-INF/lib.
3. Edit $JBOSS_HOME/server/default/deploy/jboss-portal.sar/portal-server.war/WEB-INF/context.xml file and enable proper Apache Tomcat Valve by uncommenting following lines:

   <Valve className="org.jboss.portal.identity.sso.cas.CASAuthenticationValve"
      	casLogin="https://localhost/cas/login"
      	casValidate="https://localhost/cas/serviceValidate"
      	casServerName="localhost"
      	authType="FORM"
   />
   

   Update valve options as follow:

   • casLogin: URL of your CAS Authentication Server
   • casValidate: URL of your CAS Authentication Server validation service
   • casServerName: the hostname:port combination of your CAS Authentication Server

   Note

   CAS client requires to use SSL connection. To learn how to setup JBoss Application Server to use HTTPS see here

4. Copy casclient.jar into $JBOSS_HOME/server/default/deploy/jboss-portal.sar/lib. You can download this file from CAS homepage or from JBoss repository underhttp://repository.jboss.com/cas/3.0.7/lib/

   Note

   The CAS engine does not accept self-signed SSL certificates. This requirement is fine for production use where a production level SSL certificate is available. However, for testing purposes, this can get a little annoying. Hence, if you are having this issue, you can usecasclient-lenient.jar instead.

5. Edit $JBOSS_HOME/server/default/deploy/jboss-portal.sar/META-INF/jboss-service.xml file and uncomment following lines:

   <mbean
      code="org.jboss.portal.identity.sso.cas.CASAuthenticationService"
      name="portal:service=Module,type=CASAuthenticationService"
      xmbean-dd=""
      xmbean-code="org.jboss.portal.jems.as.system.JBossServiceModelMBean">
      <xmbean/>
      <depends>portal:service=Module,type=IdentityServiceController</depends>
      <attribute name="HavingRole"></attribute>
   </mbean>
   

   This will expose special service in JBoss Portal that can be leveraged by CAS AuthenticationHandler if the server is deployed on the same application server instance. This AuthenticationHandler will be enabled in next 2 steps.

6. Edit $JBOSS_HOME/server/default/deploy/cas.war/WEB-INF/deployerConfigContext.xml and add following line in the authenticationHandlers section:

   <bean class="org.jboss.portal.identity.sso.cas.CASAuthenticationHandler" />
   

   This can replace default SimpleTestUsernamePasswordAuthenticationHandler so whole part of this config file can look as follows:

                     <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">
         <property
           name="httpClient"
           ref="httpClient" />
       </bean>
   
       <!--
        | 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.jboss.portal.identity.sso.cas.CASAuthenticationHandler" />
     </list>
   </property>
                  

To test the integration:

• Go to your portal. Typically, http://localhost:8080/portal
• Click on the "Login" link on the main portal page
• This should bring up the CAS Authentication Server's login screen instead of the default JBoss Portal login screen
• Input your portal username and password. For built-in portal login try user:user or admin:admin
• If login is successful, you should be redirected back to the portal with the appropriate user logged in