Configure ACR-based adaptive authentication¶

This page guides you through configuring Authentication-Context-Reference-based (ACR-based) adaptive authentication for a sample web application.

Scenario¶

Consider a scenario where you want users to be authenticated into an application based on the authentication context value used when logging in.

Prerequisites¶

• Download Apache Tomcat 8.x and install it. Tomcat server installation location will later be referred to as <TOMCAT_HOME> in this guide.

• It is recommended that you use a hostname that is not localhost to avoid browser errors. Modify your machine's /etc/hosts entry to reflect this.

  Info

  Note that wso2is.local is used in this documentation as an example, but you must modify this when configuring the authenticators or connectors with this sample application.

Download the sample¶

To deploy a WSO2 Identity Server sample application, you need download the playground2.war file from the latest release assets.

Deploy the sample web app¶

To deploy the sample web app on a web container:

1. Copy the downloaded playground2.war file into the <TOMCAT_HOME>/apache-tomcat-<version>/webapps folder.

2. Start the Tomcat server.

3. Access the applcation through this URL: http://wso2is.local:8080/playground2/oauth2.jsp

   Info

   By default, Tomcat runs on port 8080. If you have configured it to run on a different port, update the URL and access the playground application.

You will now be redirected to the landing page of the sample application.

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

Register a service provider¶

1. On WSO2 Identity Server Management Console, go to Main > Identity > Service Providers and click Add.

2. Enter playground2 as the Service Provider Name text box, and click Register.

3. Expand the Inbound Authentication Configuration > OAuth/OpenID Connect Configuration and click Configure.

4. Fill in the form that appears. By default, all Allowed Grant Types are selected; you can disable the grant types that are not required.

   Note

   The custom grant type will only appear on the UI if you have configured the JWT grant type. The value specified as the name of the oauth.custom_grant_type in the deployment.toml file when creating the custom grant type is the value that will appear on the UI. For more information on writing a custom grant type, see Write a Custom OAuth 2.0 Grant Type.

5. Enter the Callback Url as http://wso2is.local:8080/playground2/oauth2client.

   Tip

   For more information on other advanced configurations refer, Advanced OpenID Connect.

6. Click Add. Note that client key and client secret are generated.

7. Click Update.

Configure acr-based authentication¶

To configure ACR-based authentication for an application:

1. On the management console, go to Main > Identity > Service Providers > List.

2. Click Edit on the saml2-web-app-pickup-dispatch.com service provider.

3. Expand the Local and Outbound Authentication Configuration section and click Advanced Configuration.

4. You will be redirected to Advanced Configuration, expand Script Based Conditional Authentication.

5. In the Templates section, click on the + corresponding to the ACR-Based template.

   

6. Click Ok to add the authentication script. The authentication script and authentication steps will be configured.

   Info

   The authentication script prompts authentication steps based on the acr values as follows.

   • 'acr1' - step 1 (basic authentication)
   • 'acr2' - step 1 and 2 (basic authentication and TOTP)
   • 'acr3' - step 1 and 3 (basic authentication and Security Key/Biometrics (FIDO))

7. Click Update to save your configurations.

Try it out¶

1. Access the following sample Playground application URL: http://wso2is.local:8080/playground2/index.jsp

2. Click Import Photos.

3. Enter the client ID of the OAuth service provider application you registered above and enter 'acr2' as the Authentication Context Class value.

   Leave the rest of the configurations as they are.

   

4. You are now prompted for basic authentication followed by TOTP authentication. Step 1 and Step 2 are prompted as the ACR value entered was acr2.

   Tip

   You can re-try this flow using the ACR value 'acr3'. Note that you are then prompted for steps 1 and 3 (basic authentication and Security Key/Biometrics (FIDO) authentication).

   

5. Enter the TOTP code and click Continue.

6. Logout from the application and try this flow with different ACR values.