Use custom JAAS LoginModule without UME - possible?

Hi all,
I want to deploy an application that internally makes use of JAAS to authenticate users. There is a LoginModule that authenticates users against some database tables containing all the user data and profile. The application was not designed to be deployed to NetWeaver. So it does not make use of UME or some other NetWeaver specific feature. Actually it handles user management and authoroization issues completely on its own. The only reason for having JAAS is to allow customers to plug in their own LoginModule to use some other kind of user store.
When deploying the web application to a simple servlet engine like Tomcat, all I have to do is to register my LoginModule in the "jaas.conf" file that is parsed by JAAS default implementation. I also tell the JVM where my jaas.conf file is located by appending a "-Djava..." runtime parameter to the JVM startup script.
When using other application servers like IBM WebSphere things become a bit different. Normally you use the administration GUI of that server to configure your LoginModules. WebSphere for example keeps the login configuration in an internal database rather than writing everything into a "jaas.conf" text file. But the way the application can use the LoginModule is the same as in Tomcat.
But when it comes to Netweaver, it seems to me that it's not possible to define a LoginModule that your application can use WITHOUT having to couple it tightly to UME. Or did I get something wrong? Initially I've tried to modify the JVM's parameters (using SAP J2EE Config Tool) to include the location of my "jaas.conf" file containing the my login configuration. But that did not work. The parameter was really passed to the JVM but anyway my LoginModule was not found, I guess that NetWeaver has some own implementation of the JAAS interfaces that just ignore the plain text JAAS configuration files (like WebSphere also does).
The documentation that I have downloaded from SDN doesn't seem to match the 6.4 sneak preview version that I just downloaded some days ago. They say you should deploy your LoginModule as a library and add a refernce to the application. I tried that out but it did not help. The login configuration that the application wants to access is still not found. Actually there seems to be no way to specify the name for a JAAS Login Configuration in NetWeaver. At least I cound not find that in the documentation.
So basically my question is: is it possible to deploy an application that wants to use some own LoginModule (either deployed separately or together with the application, that does not matter) without making use of Netweaver specific features like UME? The application has its own user management infrastructure and just needs a way to setup a JAAS Login Configuration to access its own LoginModule.
Thanks for any reply
Henning

http://help.sap.com/saphelp_nw04s/helpdata/en/3f/1be040e136742ae10000000a155106/content.htm

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I'm just wondering if anyone has successfully been able to leverage a custom login module in combination
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In <jdevhome>\jdev\system\oracle.jwee.10.1.3.40.66\embedded-oc4j\config\system-jazn-data.xml1) Add custom login module
 <application>
 <name>current-workspace-app</name>
 <login-modules>
 <login-module>
 <class>kr.security.KnowRushLoginModule</class>
 <control-flag>required</control-flag>
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 <option>
 <name>dataSource</name>
 <value>jdbc/DB_XE_KNOWRUSHDS</value>
 </option>
 <option>
 <name>user.table</name>
 <value>users</value>
 </option>
 <option>
 <name>user.pk.column</name>
 <value>id</value>
 </option>
 <option>
 <name>user.name.column</name>
 <value>email_address</value>
 </option>
 <option>
 <name>user.password.column</name>
 <value>password</value>
 </option>
 <option>
 <name>role.table</name>
 <value>roles</value>
 </option>
 <option>
 <name>role.to.user.fk.column</name>
 <value>user_id</value>
 </option>
 <option>
 <name>role.name.column</name>
 <value>name</value>
 </option>
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 </login-module>
 </login-modules>
 </application>2) Grant login rmi permission to roles associated with custom login module (also in system-jazn-data.xml)
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 <grantee>
 <principals>
 <principal>
 <realm-name>jazn.com</realm-name>
 <type>role</type>
 <class>kr.security.principals.KRRolePrincipal</class>
 <name>Admin</name>
 </principal>
 </principals>
 </grantee>
 <permissions>
 <permission>
 <class>com.evermind.server.rmi.RMIPermission</class>
 <name>login</name>
 </permission>
 </permissions>
</grant>
<grant>
 <grantee>
 <principals>
 <principal>
 <realm-name>jazn.com</realm-name>
 <type>role</type>
 <class>kr.security.principals.KRRolePrincipal</class>
 <name>Member</name>
 </principal>
 </principals>
 </grantee>
 <permissions>
 <permission>
 <class>com.evermind.server.rmi.RMIPermission</class>
 <name>login</name>
 </permission>
 </permissions>
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<?xml version="1.0" encoding="utf-8"?>
<ejb-jar xmlns ....
<assembly-descriptor>
 <security-role>
 <role-name>sr_Admin</role-name>
 </security-role>
 <security-role>
 <role-name>sr_Member</role-name>
 </security-role>
</assembly-descriptor>
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My orion-ejb-jar.xml contains ...
<?xml version="1.0" encoding="utf-8"?>
<orion-ejb-jar ...
<assembly-descriptor>
 <security-role-mapping name="sr_Admin">
 <group name="Admin"></group>
 </security-role-mapping>
 <security-role-mapping name="sr_Member">
 <group name="Member"></group>
 </security-role-mapping>
 <default-method-access>
 <security-role-mapping name="sr_Member" impliesAll="true">
 </security-role-mapping>
 </default-method-access>
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<?xml version="1.0" encoding="utf-8"?>
<orion-application xmlns ...
<security-role-mapping name="sr_Admin">
 <group name="Admin"></group>
</security-role-mapping>
<security-role-mapping name="sr_Member">
 <group name="Member"></group>
</security-role-mapping>
<jazn provider="XML">
 <property name="role.mapping.dynamic" value="true"></property>
 <property name="custom.loginmodule.provider" value="true"></property>
</jazn>
<namespace-access>
 <read-access>
 <namespace-resource root="">
 <security-role-mapping name="sr_Admin">
 <group name="Admin"/>
 <group name="Member"/>
 </security-role-mapping>
 </namespace-resource>
 </read-access>
 <write-access>
 <namespace-resource root="">
 <security-role-mapping name="sr_Admin">
 <group name="Admin"/>
 <group name="Member"/>
 </security-role-mapping>
 </namespace-resource>
 </write-access>
</namespace-access>
</orion-application>My essentially auto-generated EJB 3 client does the following :-
 Hashtable env = new Hashtable();
 env.put(Context.SECURITY_PRINCIPAL, "matt.shannon");
 env.put(Context.SECURITY_CREDENTIALS, "welcome1");
 final Context context = new InitialContext(env);
 KRFacade kRFacade = (KRFacade)context.lookup("KRFacade");
...And throws the error
20/04/2007 00:55:37 oracle.j2ee.rmi.RMIMessages
EXCEPTION_ORIGINATES_FROM_THE_REMOTE_SERVER
WARNING: Exception returned by remote server: {0}
javax.naming.NoPermissionException: Not allowed to look
up KRFacade, check the namespace-access tag setting in
orion-application.xml for details
 at
com.evermind.server.rmi.RMIClientConnection.handleLookupRe
sponse(RMIClientConnection.java:819)
 at
com.evermind.server.rmi.RMIClientConnection.handleOrmiComm
andResponse(RMIClientConnection.java:283)
....I can see from the console that the user was successfully authenticated :-
20/04/2007 00:55:37 kr.security.KnowRushLoginModule validate
WARNING: [KnowRushLoginModule] User matt.shannon authenticated
And that user is granted both the Admin, and Member roles.
The test servlet using basic authentication correctly detects the user and roles perfectly...
public void doGet(HttpServletRequest request,
 HttpServletResponse response)
 throws ServletException, IOException
 LOGGER.log(Level.INFO,LOGPREFIX +"doGet called");
 response.setContentType(CONTENT_TYPE);
 PrintWriter out = response.getWriter();
 out.println("<html>");
 out.println("<head><title>ExampleServlet</title></head>");
 out.println("<body>");
 out.println("The servlet has received a GET. This is the reply.");
 out.println(" getRemoteUser = " + request.getRemoteUser());
 out.println(" getUserPrincipal = " + request.getUserPrincipal());
 out.println(" isUserInRole('sr_Admin') = "+request.isUserInRole("sr_Admin"));
 out.println(" isUserInRole('sr_Memeber') = "+request.isUserInRole("sr_Member"));Anyone got any ideas what could be going wrong?
cheers
Matt.
Message was edited by:
mshannon

Thanks for the response. I checked out your blog and tried your suggestions. I'm sure it works well in standalone OC4J, but i was still unable to get it to function correctly from JDeveloper embedded.
Did you ever get the code working directly from JDeveloper?
Your custom code essentially seems to be the equivalent of a grant within system-jazn-data.xml.
For example, the following grant to a custom jaas role (JAAS_ADMIN) that gets added by my custom login module gives them rmi login access :-
 <grant>
 <grantee>
 <principals>
 <principal>
 <realm-name>jazn.com</realm-name>
 <type>role</type>
 <class>kr.security.principals.KRRolePrincipal</class>
 <name>JAAS_Admin</name>
 </principal>
 </principals>
 </grantee>
 <permissions>
 <permission>
 <class>com.evermind.server.rmi.RMIPermission</class>
 <name>login</name>
 </permission>
 </permissions>
 </grant>If I add the following to orion-application.xml

<namespace-access>
 <read-access>
 <namespace-resource root="">
 <security-role-mapping>
 <group name="JAAS_Admin"></group>
 </security-role-mapping>
 </namespace-resource>
 </read-access>Running a standalone client against the embedded jdev oc4j server gives the namespace-access error.
I tried out your code by essentially creating a static reference to a singleton class that does the role lookup/provisioning with rmi login grant :-
From custom login module :-
private static KRSecurityHelper singleton = new KRSecurityHelper();
protected Principal[] m_Principals;
 Vector v = new Vector();
 v.add(singleton.getCustomRmiConnectRole());
 // set principals in LoginModule
 m_Principals=(Principal[]) v.toArray(new Principal[v.size()]);
Singleton class :-
package kr.security;
import com.evermind.server.rmi.RMIPermission;
import java.util.logging.Level;
import java.util.logging.Logger;
import oracle.security.jazn.JAZNConfig;
import oracle.security.jazn.policy.Grantee;
import oracle.security.jazn.realm.Realm;
import oracle.security.jazn.realm.RealmManager;
import oracle.security.jazn.realm.RealmRole;
import oracle.security.jazn.realm.RoleManager;
import oracle.security.jazn.policy.JAZNPolicy;
import oracle.security.jazn.JAZNException;
public class KRSecurityHelper
private static final Logger LOGGER = Logger.getLogger("kr.security");
private static final String LOGPREFIX = "[KRSecurityHelper] ";
public static String CUSTOM_RMI_CONNECT_ROLE = "remote_connect";
private RealmRole m_Role = null;
public KRSecurityHelper()
 LOGGER.log(Level.FINEST,LOGPREFIX +"calling JAZNConfig.getJAZNConfig");
 JAZNConfig jc = JAZNConfig.getJAZNConfig();
 LOGGER.log(Level.FINEST,LOGPREFIX +"calling jc.getRealmManager");
 RealmManager realmMgr = jc.getRealmManager();
 try
 // Get the default realm .. e.g. jazn.com
 LOGGER.log(Level.FINEST,LOGPREFIX +"calling jc.getGetDefaultRealm");
 Realm r = realmMgr.getRealm(jc.getDefaultRealm());
 LOGGER.log(Level.INFO,LOGPREFIX +"default realm: "+r.getName());
 // Access the role manager for the remote connection role
 LOGGER.log(Level.FINEST,
 LOGPREFIX +"calling default_realm.getRoleManager");
 RoleManager roleMgr = r.getRoleManager();
 LOGGER.log(Level.INFO,LOGPREFIX +"looking up custom role '"
 CUSTOM_RMI_CONNECT_ROLE "'");
 RealmRole rmiConnectRole = roleMgr.getRole(CUSTOM_RMI_CONNECT_ROLE);
 if (rmiConnectRole == null)
 LOGGER.log(Level.INFO,LOGPREFIX +"role does not exist, create it...");
 rmiConnectRole = roleMgr.createRole(CUSTOM_RMI_CONNECT_ROLE);
 LOGGER.log(Level.FINEST,LOGPREFIX +"constructing new grantee");
 Grantee gtee = new Grantee(rmiConnectRole);
 LOGGER.log(Level.FINEST,LOGPREFIX +"constructing login rmi permission");
 RMIPermission login = new RMIPermission("login");
 LOGGER.log(Level.FINEST,
 LOGPREFIX +"constructing subject.propagation rmi permission");
 RMIPermission subjectprop = new RMIPermission("subject.propagation");
 // make policy changes
 LOGGER.log(Level.FINEST,LOGPREFIX +"calling jc.getPolicy");
 JAZNPolicy policy = jc.getPolicy();
 if (policy != null)
 LOGGER.log(Level.INFO, LOGPREFIX
 + "add to policy grant for RMI 'login' permission to "
 + CUSTOM_RMI_CONNECT_ROLE);
 policy.grant(gtee, login);
 LOGGER.log(Level.INFO, LOGPREFIX
 + "add to policy grant for RMI 'subject.propagation' permission to "
 + CUSTOM_RMI_CONNECT_ROLE);
 policy.grant(gtee, subjectprop);
 // m_Role = rmiConnectRole;
 m_Role = roleMgr.getRole(CUSTOM_RMI_CONNECT_ROLE);
 LOGGER.log(Level.INFO, LOGPREFIX
 + m_Role.getName() + ":" + m_Role.getFullName() + ":" + m_Role.getFullName());
 else
 LOGGER.log(Level.WARNING,LOGPREFIX +"Cannot find jazn policy!");
 else
 LOGGER.log(Level.INFO,LOGPREFIX +"custom role already exists");
 m_Role = rmiConnectRole;
 catch (JAZNException e)
 LOGGER.log(Level.WARNING,
 LOGPREFIX +"Cannot configure JAZN for remote connections");
public RealmRole getCustomRmiConnectRole()
 return m_Role;
}Using the code approach and switching application.xml across so that namespace access is for the group remote_connect, I get the following error from my bean :-
INFO: Login permission not granted for current-workspace-app (test.user)
Thus, the login permission that I'm adding through the custom remote_connect role does not seem to work. Even if it did, i'm pretty sure I would still get that namespace error.
This has been such a frustrating process. All the custom login module samples using embedded JDeveloper show simple j2ee servlet protection based on settings in web.xml.
There are no samples showing jdeveloper embedded oc4j using ejb with custom login modules.
Hopefully the oc4j jdev gurus like Frank can write a paper that demonstrates this.
Matt.

Use custom JAAS LoginModule without UME - possible?

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