Configure the Google authentication provider

The first thing to do is to configure the OAuth2 Provider and obtain Client ID and Client Secret keys.

Configure the Google IDP

  1. Obtain OAuth 2.0 credentials from the Google API Console.

    Visit the Google API Console to obtain OAuth 2.0 credentials such as a client ID and client secret that are known to both Google and your application. The set of values varies based on what type of application you are building. For example, a JavaScript application does not require a secret, but a web server application does.

    • Login with a valid Google Account

    • Click on Create project

      ../../../_images/google-create-project1.png

    • give the project a name like geoserver-oidc and press “Create”

      ../../../_images/google-create-project2.png

    • Click on Credencials (left column)

      ../../../_images/google-credentials.png

    • Click on “+ Create credentials” (top bar)

      ../../../_images/google-credentials2.png

    • Choose “OAuth client ID”

      ../../../_images/google-credentials3.png

    • Click on “Configure consent Screen”

      ../../../_images/google-credentials4.png

    • Press “Get Started”

      ../../../_images/google-credentials5.png

    • Type in an “App name” (like “test-gs”), choose your Email address, and then press “Next”

      ../../../_images/google-credentials6.png

    • In the Audience section, choose “External” then press “Next”

      ../../../_images/google-credentials7.png

    • Type in a contact email, then press “Next”

      ../../../_images/google-credentials8.png

    • Agree to the terms, then press “Continue”, and then “Create”

      ../../../_images/google-credentials9.png

    • Go to Clients (Left Bar), press the 3-vertical-dots ,and then press “+ Create Client”

      ../../../_images/google-credentials10.png

    • Choose “Web Application” and name the web application (i.e. “gs test app”)

      ../../../_images/google-credentials11.png

    • Go down to “Authorized redirect URIs” and press “+ Add URI”, type in “http://localhost:8080/geoserver/web/login/oauth2/code/google”, then press “Create”

      ../../../_images/google-credentials12.png

    • Record your Client ID and Client Secret, then press “Ok”

      • You will not be able to retreive your client secret once you press “ok”

      ../../../_images/google-credentials13.png

    • Go to “Audience” (left bar), go down to “Test Users”, press “+Add users”, and add your google email as the test user.

      ../../../_images/google-credentials14.png

    • Press Save

Configure GeoServer

The next step is to configure your Google application as the OIDC IDP for GeoServer.

Create the OIDC Filter

  • Login to GeoServer as an Admin

  • On the left bar under “Security”, click “Authentication”, and then “OpenID Connect Login”

    ../../../_images/google-gs1.png

  • Give the it a name like “test-google”, then click the “Google Login” checkbox and copy-and-paste in the Client ID and Client Secret (from when you configured the google client).

    ../../../_images/google-gs2.png

  • Go down to the bottom and configure the role source (if you want) - see role source

  • Press “Save”

Allow Web Access (Filter Chain)

  • On the left bar under “Security”, click “Authentication”, and then click “Web” under “Filter Chains”

    ../../../_images/google-filterchain1.png

  • Scroll down, and move the new Google OIDC Filter to the Selected side by pressing the “->” button.

    ../../../_images/google-filterchain2.png

  • Move the new Google OIDC Filter above “anonymous” by pressing the up arrow button.

    ../../../_images/google-filterchain3.png

  • Press “Close”

  • Press “Save”

Notes

See troubleshooting.

  1. Google’s Access Token is opaque, so configure roles via the ID Token

  2. Google’s ID Token does not contain very much info

    {
   "iss": "https://accounts.google.com",
   "azp": "...",
   "aud": "...",
   "sub": "..",
   "email": "dblasby@gmail.com",
   "email_verified": true,
   "at_hash": "1iKn2vPzlGpK-aY2n3",
   "nonce": "Gi-fBHjrpUdC3o8K6zYhIbEdv1Jz6Zu0IF3sIT",
   "name": "David Blasby",
   "picture": "https://lh3.googleusercontent.com/a/ACg8ocLEhY",
   "given_name": "David",
   "family_name": "Blasby",
   "iat": 175,
   "exp": 175
}
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