Examples of javax.security.auth.spi.LoginModule

javax.security.auth.spi.LoginModule

{@code LoginModule} describes the interfaceimplemented by authentication technology providers. LoginModules are plugged in under applications to provide a particular type of authentication.
While applications write to the {@code LoginContext} API,authentication technology providers implement the {@code LoginModule} interface.A {@code Configuration} specifies the LoginModule(s)to be used with a particular login application. Therefore different LoginModules can be plugged in under the application without requiring any modifications to the application itself.
The {@code LoginContext} is responsible for reading the{@code Configuration} and instantiating the appropriateLoginModules. Each {@code LoginModule} is initialized witha {@code Subject}, a {@code CallbackHandler}, shared {@code LoginModule} state, and LoginModule-specific options.The {@code Subject} represents the{@code Subject} currently being authenticated and is updatedwith relevant Credentials if authentication succeeds. LoginModules use the {@code CallbackHandler} tocommunicate with users. The {@code CallbackHandler} may beused to prompt for usernames and passwords, for example. Note that the {@code CallbackHandler} may be null. LoginModuleswhich absolutely require a {@code CallbackHandler} to authenticatethe {@code Subject} may throw a {@code LoginException}. LoginModules optionally use the shared state to share information or data among themselves.
The LoginModule-specific options represent the options configured for this {@code LoginModule} by an administrator or userin the login {@code Configuration}. The options are defined by the {@code LoginModule} itselfand control the behavior within it. For example, a {@code LoginModule} may define options to support debugging/testingcapabilities. Options are defined using a key-value syntax, such as debug=true. The {@code LoginModule}stores the options as a {@code Map} so that the values maybe retrieved using the key. Note that there is no limit to the number of options a {@code LoginModule} chooses to define.
The calling application sees the authentication process as a single operation. However, the authentication process within the {@code LoginModule} proceeds in two distinct phases.In the first phase, the LoginModule's {@code login} method gets invoked by the LoginContext's{@code login} method. The {@code login}method for the {@code LoginModule} then performsthe actual authentication (prompt for and verify a password for example) and saves its authentication status as private state information. Once finished, the LoginModule's {@code login}method either returns {@code true} (if it succeeded) or{@code false} (if it should be ignored), or throws a{@code LoginException} to specify a failure.In the failure case, the {@code LoginModule} must not retry theauthentication or introduce delays. The responsibility of such tasks belongs to the application. If the application attempts to retry the authentication, the LoginModule's {@code login} method will becalled again.
In the second phase, if the LoginContext's overall authentication succeeded (the relevant REQUIRED, REQUISITE, SUFFICIENT and OPTIONAL LoginModules succeeded), then the {@code commit}method for the {@code LoginModule} gets invoked.The {@code commit} method for a {@code LoginModule} checks itsprivately saved state to see if its own authentication succeeded. If the overall {@code LoginContext} authentication succeededand the LoginModule's own authentication succeeded, then the {@code commit} method associates the relevantPrincipals (authenticated identities) and Credentials (authentication data such as cryptographic keys) with the {@code Subject}located within the {@code LoginModule}.
If the LoginContext's overall authentication failed (the relevant REQUIRED, REQUISITE, SUFFICIENT and OPTIONAL LoginModules did not succeed), then the {@code abort} method for each {@code LoginModule}gets invoked. In this case, the {@code LoginModule} removes/destroysany authentication state originally saved.
Logging out a {@code Subject} involves only one phase.The {@code LoginContext} invokes the LoginModule's {@code logout}method. The {@code logout} method for the {@code LoginModule}then performs the logout procedures, such as removing Principals or Credentials from the {@code Subject} or logging session information.
A {@code LoginModule} implementation must have a constructor withno arguments. This allows classes which load the {@code LoginModule}to instantiate it. @see javax.security.auth.login.LoginContext @see javax.security.auth.login.Configuration

    private void actionAttemptLogin(RealmData data, PortletRequest request, PortletSession session, String username, String password) {
        session.removeAttribute("TestLoginPrincipals");
        session.removeAttribute("TestLoginError");
        Map options = new HashMap();
        try {
            LoginModule module = loadModule(request, data, options);
            Subject sub = PortletManager.testLoginModule(request, module, options, username, password);
            session.setAttribute("TestLoginPrincipals", sub.getPrincipals());
        } catch (Exception e) {
            log.warn("Test login failed", e);
            session.setAttribute("TestLoginError", "Login Failed: " + (e.getMessage() == null ? "no message" : e.getMessage()));

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    }


    private String actionTestLoginModuleLoad(PortletRequest request, RealmData data) {
        Map options = new HashMap();
        try {
            LoginModule module = loadModule(request, data, options);
            log.warn("Testing with options " + options);
            try {
                PortletManager.testLoginModule(request, module, options);
                return null;
            } catch (Exception e) {

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            } catch (MalformedURLException e) {
                log.warn("Repository unable to look up JAR file", e);
            }
        }
        Class cls = loader.loadClass(getSelectedModule(data).getClassName());
        LoginModule module = (LoginModule) cls.newInstance();
        for (Iterator it = data.getOptions().keySet().iterator(); it.hasNext();) {
            String key = (String) it.next();
            final Object value = data.getOptions().get(key);
            if (value != null && !value.equals("")) {
                options.put(key, value);

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    private void actionAttemptLogin(RealmData data, PortletRequest request, PortletSession session, String username, String password) {
        session.removeAttribute("TestLoginPrincipals");
        session.removeAttribute("TestLoginError");
        Map options = new HashMap();
        try {
            LoginModule module = loadModule(request, data, options);
            Subject sub = PortletManager.testLoginModule(request, module, options, username, password);
            session.setAttribute("TestLoginPrincipals", sub.getPrincipals());
        } catch (Exception e) {
            log.warn("Test login failed", e);
            session.setAttribute("TestLoginError", "Login Failed: " + (e.getMessage() == null ? "no message" : e.getMessage()));

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        clientHandle = service.connectToRealm(realmName);
        JaasLoginModuleConfiguration[] config = service.getLoginConfiguration(clientHandle);
        workers = new LoginModuleConfiguration[config.length];


        for (int i = 0; i < workers.length; i++) {
            LoginModule wrapper;
            if (config[i].isServerSide()) {
                wrapper = new ServerLoginModule(i);
            } else {
                LoginModule source = config[i].getLoginModule(JaasLoginCoordinator.class.getClassLoader());
                wrapper = new ClientLoginModule(source, i);
            }
            workers[i] = new LoginModuleConfiguration(wrapper, config[i].getFlag());
            workers[i].getModule().initialize(subject, handler, new HashMap(), config[i].getOptions());
        }

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     * populates them, and sends them back to the server.
     */
    public Callback[] getServerLoginCallbacks(JaasClientId clientHandle, int loginModuleIndex) throws LoginException {
        JaasSecurityContext context = (JaasSecurityContext) activeLogins.get(clientHandle);
        checkContext(context, loginModuleIndex, true);
        LoginModule module = context.getLoginModule(loginModuleIndex);


        context.getHandler().setExploring();
        try {
            module.initialize(context.getSubject(), context.getHandler(), new HashMap(), context.getOptions(loginModuleIndex));
        } catch (Exception e) {
            System.err.println("Failed to initialize module");
            e.printStackTrace();
        }
        try {
            module.login();
        } catch (LoginException e) {
        }
        try {
            module.abort();
        } catch (LoginException e) {
        }
        return context.getHandler().finalizeCallbackList();
    }

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        });
    }


    public void testCurrentUserHasCustomRole() throws Exception {
        Subject subject = new Subject();
        LoginModule lm = new TestLoginModule(new TestRolePrincipal("foo"));
        lm.initialize(subject, null, null, null);
        lm.login();
        lm.commit();


        Subject.doAs(subject, new PrivilegedAction<Void>() {
            public Void run() {
                assertTrue(KarafMBeanServerGuard.currentUserHasRole(TestRolePrincipal.class.getCanonicalName() + ":foo"));
                assertFalse(KarafMBeanServerGuard.currentUserHasRole("foo"));

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        });
    }


    private Subject loginWithTestRoles(String... roles) throws LoginException {
        Subject subject = new Subject();
        LoginModule lm = new TestLoginModule(roles);
        lm.initialize(subject, null, null, null);
        lm.login();
        lm.commit();
        return subject;
    }

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        request.setUserPrincipal( principal );
        try
        {
            // Test using Principal (WebContainerLoginModule succeeds)
            CallbackHandler handler = new WebContainerCallbackHandler( m_engine, request );
            LoginModule module = new WebContainerLoginModule();
            module.initialize( m_subject, handler, 
                              new HashMap<String, Object>(), 
                              new HashMap<String, Object>());
            module.login();
            module.commit();
            Set principals = m_subject.getPrincipals();
            assertEquals( 1, principals.size() );
            assertTrue(  principals.contains( principal ) );
            assertFalse( principals.contains( Role.ANONYMOUS ) );
            assertFalse( principals.contains( Role.ASSERTED ) );

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        MockHttpServletRequest request = m_engine.newHttpRequest();
        request.setUserPrincipal( principal );
        try
        {
            CallbackHandler handler = new WebContainerCallbackHandler( m_engine, request );
            LoginModule module = new WebContainerLoginModule();
            module.initialize( m_subject, handler, 
                              new HashMap<String, Object>(), 
                              new HashMap<String, Object>());
            module.login();
            module.commit();
            Set principals = m_subject.getPrincipals();
            assertEquals( 1, principals.size() );
            assertTrue( principals.contains( principal ) );
            assertFalse( principals.contains( Role.AUTHENTICATED ) );
            assertFalse( principals.contains( Role.ALL ) );
            module.logout();
            assertEquals( 0, principals.size() );
        }
        catch( LoginException e )
        {
            System.err.println( e.getMessage() );

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