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This topic documents instructions on how to test the OpenID Connect session management feature with the WSO2 Playground sample application as the Relying Party (RP) with WSO2 Identity Server as the OpenID Connect Provider (OP). See Configuring OpenID Connect Single Logout for more information. 

Relying Party (RP) and OpenID Provider (OP) definitions in this context is as follows,

Relying Parties (RPs) - OAuth 2.0 Clients using OpenID Connect

OpenID Providers (OPs) - OAuth 2.0 Authentication Servers implementing OpenID Connect

Prerequisites

  1. In order to test the OpenID Connect session management feature, you need to have a relying party (RP) implementation. You can use either of the following options for this:
    • The example pseudo-code for the RP iframe provided in the official specification.
    • The WSO2 Identity Server Playground sample application. Expand the section below to set up. 

       Setting up the sample

      Setting Up the Sample Webapp
      To obtain and configure the Playground sample, follow the steps below.
      1. You can check out the repository of the OAuth 2.0 sample from GitHub. Follow the instructions here to checkout the folder. We refer <SAMPLE_HOME> as the modules/samples folder inside the folder where the product-is repository is checked out.

      2. Open a terminal window and add the following entry to the /etc/hosts file of your machine to configure the hostname.

        Why is this step needed?

        Some browsers do not allow you to create cookies for a naked hostname, such as localhost. Cookies are required when working with SSO. Therefore, to ensure that the SSO capabilities work as expected in this tutorial, you need to configure the etc/host file as explained in this step.

        The etc/host file is a read-only file. Therefore, you won't be able to edit it by opening the file via a text editor. To avoid this, edit the file using the terminal commands.
        For example, use the following command if you are working on a Mac/Linux environment.

        sudo nano /etc/hosts
        127.0.0.1		wso2is.local
      3. Navigate to <SAMPLE_HOME>/oauth2/playground2 directory via the terminal and build the sample using the following command. You must have Apache Maven installed to do this (see Installation Prerequisites for the appropriate version to use).

        mvn clean install
      4. After successfully building the sample, a .war file named playground2 can be found inside the <SAMPLE_HOME>/oauth2/playground2/target folder. Deploy this sample web app on a web container, such as Apache Tomcat server.

        Since this sample is written based on Servlet 3.0 it needs to be deployed on Tomcat 7.x.

        Use the following steps to deploy the web app in the web container:

        1. Stop the Apache Tomcat server if it is already running.
        2. Copy the playground2.war file to the <TOMCAT_HOME>/webapps folder.
        3. Start the Apache Tomcat server.
      5. Make sure to update param-value parameter in the WEB-INF/web.xml file with the server URL of the Identity Server if required.
        Make sure to enter the port the application is running on, in the URL. If you have started the Identity Server with a port offset, then the respective port needs to be configured here.

        <init-param>
             <description>serverUrl</description>
             <param-name>serverUrl</param-name>
             <param-value>https://localhost:9443/services/</param-value>
        </init-param>

        Note that localhost is the server that hosts WSO2 Identity Server and 9443 is the default SSL port of it. In order to access the admin services you should have the values in step 5 and 6. Since playground application is accessing the admin service OAuth2TokenValidationService, you should have the correct serverUrl,username and password as described in step 5 and 6.

      6. Update param-value parameter with credentials of an admin user if required.

        <init-param>
             <description>userName</description>
             <param-name>userName</param-name>
             <param-value>admin</param-value>
        </init-param>
        <init-param>
             <description>password</description>
             <param-name>password</param-name>
             <param-value>admin</param-value>
        </init-param>
      7. Restart Apache Tomcat and access http://wso2is.local:8080/playground2/
        By default Tomcat runs on port 8080. If you have configured it to run on a different port make sure to update the URL and access the playground application.
        You are directed to the landing page of the sample application. Click on Import Photos and the following page appears.

      Are you getting the error that is given below?

      Error
      javax.net.ssl.SSLHandshakeException: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target

      The sample applications do not have a keystore in them. Therefore, after changing the tomcat hostname you might get this error because the public key of the WSO2 Identity Server does not exist in the Java certificate store. For more information on the steps you need to follow to overcome the error, see FAQ.

  2. Deploy two relying party applications. To do this, make a copy of the playground2.war file that was generated when you set up the sample webapp, and rename it as "playground3.war". 

    Navigate to the following URLs to check both were deployed properly. You will be able to see the following screen.

    •  http://wso2is.local:8080/playground2/  
    •   http://wso2is.local:8080/playground3// 

Registering the relying party applications

  1. Start the IS server and log into the management console.
  2. Add a new service provider named "playground2" and click Register.
  3. Expand the Inbound Authentication Configuration section and then the OAuth/OpenID Connect Configuration and click Configure.
    For more information, see Configuring OAuth2-OpenID Connect
  4. Expand the Local & Outbound Authentication Configuration section and select Use tenant domain in local subject identifier to sign the ID token with the user's tenant domain. 

    Alternatively, to sign the ID token with the service provider's tenant domain, open the identity.xml file found in the <IS_HOME>/conf/repository/identity folder and set the following property to true.

    <!-- Sign the ID Token with Service Provider Tenant Private Key-->
    <SignJWTWithSPKey>true</SignJWTWithSPKey>
  5. Enter http://wso2is.local:8080/playground2/oauth2client as the callback URL and click Add.

    At this point, you will see the client key and client secret.

    Note these values as you will need them later in this process.

  6. Repeat steps 1- 4 and register a service provider named as "playground3".

Testing session management with WSO2 Playground

  1. Access the following URL: http://wso2is.local:8080/playground2/  and click on Import Photos.
  2. Enter the following values and click Authorize
    • Authorization Grant Type: Authorization Code (with this sample you can only test OIDC for the Authorization Code flow)
    • Client Id: Enter the client ID (OAuth Client Key under Registering the relying Application, step 4) of the registered playground2 application 
    • Scope: openid
    • Callback URL:  http://wso2is.local:8080/playground2/oauth2client
    • Authorize Endpoint: https://localhost:9443/oauth2/authorize
    • Logout Endpoint: https://localhost:9443/oidc/logout
    • Session Iframe Endpoint: https://localhost:9443/oidc/checksession?client_id=<clientID of playground2 application>
  3. Log in with the user credentials and click Approve Always at the consent page. 

    In order to enable single logout (SLO) you must use the  Approve Always  option. If this is not done, the passive request will not work, and without passive requests, the SLO protocol will not work.  Do this to avoid errors during execution.

  4. Once it is successfully authenticated, the OpenIDConnect Provider(OP) will redirect back to the client application with the authorization code and the session state. You can see this in the logs of the console, as seen below.
  5. Enter the following values and click Get Access Token to receive the ID token and access token. 
    • Callback URL: http://wso2is.local:8080/playground2/oauth2client
    • Access Token Endpoint: https://localhost:9443/oauth2/token
    • Client Secret: Enter the client secret of playground2 application
  6. You will receive the access token. You can also enter the UserInfo Endpoint as https://localhost:9443/oauth2/userinfo?schema=openid to use the received access token to obtain user claims if needed. 
  7. Access the following URL on a separate window of the browser, and click on Import Photos: http://wso2is.local:8080/playground3/  
  8. Repeat steps 7-9 to invoke the playground3 application.

  9. Once you receive the authorization code for the playground3 app, open the browser console of the playground2 app. You will see that the RP iframe of playground2 has initiated a passive authentication request as the session state changed. Since the response has been received, the app will update it’s session state value and keep polling the OP iframe again. 

  10. Go back to the browser window of the playground3 app, and click Logout. Click Approve when prompted for consent. 
  11. Go back to the browser window of the playground2 app. You will see that the home page has loaded. If you check the console logs, you will note that the the playground2 app’s RP iframe has initiated a passive authentication request and has received an error since the end user session has ended. This means the app has successfully handled this as a single logout scenario.

How to keep the user session live in Identity Server

In WSO2 Identity Server, you can use an authorization endpoint to increase the session idle time.

To do this, add an iframe to the service provider application which sends a prompt=none call to the OAuth2 authorization endpoint after each iteration of n minutes and refreshes the user session at the server end. A sample iframe is shown below.

<iframe id="refresh_iframe" src="#" style="width:0;height:0;border:0; border:none;"></iframe><script>setInterval(function(){document.getElementById('refresh_iframe').src
="https://localhost:9443/oauth2/authorize prompt=none&scope=openid&response_type=code&redirect_uri=http%3A%2F%2Flocalhost%3A8080%2Fplayground2%2Fprompt-none callback.jsp&client_id=7x72byIYC40dlCuu6bovOTdK2MMa";},300000);</script>

Redirect to a logout URL after RP-initiated logout

You can specify a logout URL so that the application redirects to a particular page after the RP sends the OpenID Connect logout request. For more information on how to configure the redirect logout, see OpenID Connect Logout URL Redirection.

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