Wicket Security

Wasp & Swarm

Introduction

•Maurice Marrink•Topicus•Core•Healthcare•Education•Finance

•Using Wicket since 2004

•History•Wasp•Swarm•Examples•Simple setup•Custom actions•Secure models

•Questions?

Agenda

History

•Pre Wicket: Jaas•2004 Wicket POC authentication only•2005 Custom Wicket for authorization•2006 Wicket: IAuthorizationStrategy•2006 Wicket-Jaas internal project•2007 Wasp and Swarm

WASP

•Wicket Abstract Security Platform•Action based•Authentication and Authorization•Flexible base•Support classes•Java 1.4•Wicket 1.3

Wicket

Wasp strategy

ISecurity Check

ISecureModel

Security implemen-tation

Custom security

check

1

2a

2b

3a

3b

4a

4b

1 Permission for instantiation or authorization?

2a Authorization permission?

3a Authenticated and or authorized?

3b Custom security checks.

3c Check model.

2b Authorization permission?

4a Authenticated and or authorized?

4b Custom security checks.

3c

•Implement ISecurePageInstantiation + login redirect

•Add ISecurityCheck•Or add ISecureModel•Or use an ISecureComponentAuthorization and or Authentication

SWARM

•Standard Wicket Authentication and Rights Management•Based on Wasp•ACL based•Session scope•Easy to use with dynamic roles•Jaas like security implementation•Subjects•Principals•Permissions•Actions•Policy files

grant principal nl.example.Principal "basic"{ permission ${ComponentPermission} "${myPackage}.SomePage", "inherit, render";};

ExampleSimple setup

1. Extend SwarmWebApplication2. Create Principal(s)3. Write policy files

public class App extends SwarmWebApplication{ public Class<HomePage> getHomePage(){ return HomePage.class; } public Class<LoginPage> getLoginPage(){ return LoginPage.class; } protected Object getHiveKey(){ return getServletContext().getContextPath(); }…

protected void setUpHive(){ PolicyFileHiveFactory factory = new PolicyFileHiveFactory(); factory.setAlias("package", "nl.example"); try{ factory.addPolicyFile(getServletContext() .getResource("/WEB-INF/beheer.hive")); } ... HiveMind.registerHive(getHiveKey(), factory); }

public class MyPrincipal implements Principal{ private String name; public MyPrincipal(String name){ this.name = name; } public String getName(){ return name; } public boolean implies(Subject subject){ return false; } …}

1. Design your Pages2. Implement ISecurePage3. Add security checks4. Or add secure models5. Or use secure component

grant principal ${package}.MyPrincipal "instelling.deelnemers"{ permission ${ComponentPermission} "${package}.SearchPage", "inherit, render"; permission ${ComponentPermission} "${package}.SearchPage", "enable"; permission ${ComponentPermission} "${package}.detailPage", "inherit, render"; permission ${ComponentPermission} "${package}.detailPage", "enable";};

1. Design login page2. Extend LoginContext3. Populate Subject with Principals

Wicket SecurityExample: Simple setup

public boolean signIn(String username, String password, Domain domain){ LoginContext ctx = new MyLoginContext(username, password, domain); try{ ((WaspSession)Session.get()).login(ctx); return true; } catch (LoginException e){ error(e.getMessage()); } return false;}

public Subject login() throws LoginException{ Account accnt = authenticate(username, password, domain); if (accnt != null){ clearFields(); return new MySubject(accnt); } clearFields(); throw new LoginException(“...”);}

public class MySubject extends DefaultSubject{ public MySubject(Account account){ for (Role role : account.getRoles()){ for (MyPrincipal principal: role.getPrincipals()) addPrincipal(principal); } setReadOnly(); }}

ExampleCustom actions

Should•Divide authorization in levels•Direct logic of custom security checks

Should not•Roles•User groups

Wicket

Wasp strategy

ISecurity Check

Security implemen-tation

1

2a3a

1 Component and render or enable action

2a Same

3a Custom actions?

1. Create Actions2. Register Actions3. Use Actions in security check or secure model

register(Teacher.class, “teacher"); register(Counselor.class, “counselor");register(Location.class, new SomeAction( “location“, Teacher.class, Counselor.class));register(School.class, new SomeAction( “school“, Location.class));

public interface School extends WaspAction{ // no explicit implementation required}

public boolean isActionAuthorized(WaspAction action){ WaspAction combined = null, additional; ActionFactory factory = getActionFactory(); for (Class< ? extends WaspAction> actionClass : actions){ additional = factory.getAction(actionClass); combined = action.add(additional); if (wrapped.isActionAuthorized(combined)) return verify(additional); } return false;}protected abstract boolean verify(WaspAction action);

protected boolean verify(WaspAction action){ if (action.implies(getAction(School.class))) return student.getSchool() .equals(getUser().getSchool()); if (action.implies(getAction(Location.class))) return student.takesClassesAt(getUser() .getLocations()); if(…….) ……….

return false;}

ExampleSecure models

Can•In ListViews and other Repeaters•In DropDownChoices•Reuse of security without declaring it on every Component

Can NOT•As instantiation check

public interface ISecureModel extends IModel{ public boolean isAuthorized(Component c, WaspAction a);

public boolean isAuthenticated(Component c);}

public interface SwarmModel extends ISecureModel{ public String getSecurityId(Component c);}

• Implement SwarmModel• Add DataPermission to policy file

public final String getSecurityId(Component component){ return “foo”;}public boolean isAuthenticated(Component component){ return getStrategy().isModelAuthenticated(this, component);}public boolean isAuthorized(Component component, WaspAction action){ return getStrategy().isModelAuthorized(this, component, action);}protected List<Location> load(){ if (isAuthorized(null, getAction(Instelling.class))){ …} else if (isAuthorized(null, getAction(OrganisatieEenheid.class))){ … }}

grant principal ${package}.MyPrincipal “something"{ permission ${DataPermission} “foo”, "render, school";};

Questions?More information:

http://wicketstuff.org/confluence/display/STUFFWIKI/Wicket-Security