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Cloud Identity-Aware Proxy Java Samples

Cloud Identity-Aware Proxy (Cloud IAP) lets you manage access to applications running in Compute Engine, App Engine standard environment, and Container Engine. Cloud IAP establishes a central authorization layer for applications accessed by HTTPS, enabling you to adopt an application-level access control model instead of relying on network-level firewalls. When you enable Cloud IAP, you must also use signed headers or the App Engine standard environment Users API to secure your app.

Setup

  • A Google Cloud project with billing enabled
  • A service account with private key credentials is required to create signed bearer tokens.
    • Create an App engine service account and download the credentials file as JSON.
    • Set the environment variable GOOGLE_APPLICATION_CREDENTIALS to point to the service account credentials file.
  • Install the Google Cloud SDK and run:
   gcloud init

Description

  • BuildIapRequest.java demonstrates how to set the Authorization : Bearer header with a signed JWT token to authorize access to an IAP protected URL.
  • VerifyIapRequestHeader.java demonstrates how to verify the JWT token in an incoming request to an IAP protected resource.

Testing

  • Deploy the demo app engine application. This application will return the JWT token to an authorized incoming request. It will be used to test both the authorization of an incoming request to an IAP protected resource and the JWT token returned from IAP.

  • Enable Identity-Aware Proxy on the App Engine app.

  • Add the service account email to the Identity-Aware Proxy access list for the project.

  • Update the following variables in BuildAndVerifyIapRequestIT.java:

    • IAP_PROTECTED_URL : URL of your IAP protected resource . eg. https://your-project-id.appspot.com

    • IAP_CLIENT_ID to point to the OAuth 2.0 Client ID of your IAP protected App Engine Application.

    • IAP_PROJECT_ID : Google Cloud Project ID of the IAP protected application

    • IAP_PROJECT_NUMBER : Project number of the IAP protected resource. Also available via gcloud using:

          gcloud projects describe PROJECT_ID

  • Run the integration test:

        mvn -Dtest=com.example.iap.BuildAndVerifyIapRequestIT verify

References

Known issues