Client Credentials Grant with OAuth 2.0 Playground¶

This page guides you through using a sample Playground application to try out authentication to an OAuth 2.0/OpenID Connect web application using the Client Credentials grant type.

Set up the sample application¶

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 MWARE IAM 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 MWARE IAM 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.

Try Client Credentials grant¶

The following cURL command can be used to try this grant type.

curl -v -X POST --basic -u <oauth_client_key>:<oauth_client_secret> -H "Content-Type:application/x-www-form-urlencoded;charset=UTF-8" -k -d "grant_type=client_credentials" <token_endpoint>

curl -v -X POST --basic -u 7wYeybBGCVfLxPmS0z66WNMffyMa:WYfwHUsbsEvwtqmDLuaxF_VCQJwa -H "Content-Type:application/x-www-form-urlencoded;charset=UTF-8" -k -d "grant_type=client_credentials" https://localhost:9443/oauth2/token

You will receive the following response with the access token.

{
    "access_token":"16ab408c-0f31-3321-8bed-313e836df373",
    "token_type":"Bearer",
    "expires_in":2986
}

[oauth.custom_scope_validator]
class = "org.fully.qualified.class.name.CustomScopeValidator"