Configure OpenID Connect with ACL authorization
Using the OpenID Connect and ACL plugins, set up any type of authentication (the password grant, in this guide) and enable authorization through ACL groups.
Prerequisites
Kong Konnect
This is a Konnect tutorial. If you don’t have a Konnect account, you can get started quickly with our onboarding wizard.
-
The following Konnect items are required to complete this tutorial:
- Personal access token (PAT): Create a new personal access token by opening the Konnect PAT page and selecting Generate Token.
- Control Plane Name: You can use an existing Control Plane or create a new one to use for this tutorial.
- Konnect Proxy URL: By default, a self-hosted Data Plane uses
http://localhost:8000
. You can set up Data Plane nodes for your Control Plane from the Gateway Manager in Konnect.
-
Set the personal access token, the Control Plane name, the Control Plane URL, and the Konnect proxy URL as environment variables:
export DECK_KONNECT_TOKEN='YOUR KONNECT TOKEN' export DECK_KONNECT_CONTROL_PLANE_NAME='YOUR CONTROL PLANE NAME' export KONNECT_CONTROL_PLANE_URL=https://us.api.konghq.com export KONNECT_PROXY_URL='KONNECT PROXY URL'
Kong Gateway running
This tutorial requires Kong Gateway Enterprise. If you don’t have Kong Gateway set up yet, you can use the quickstart script with an enterprise license to get an instance of Kong Gateway running almost instantly.
-
Export your license to an environment variable:
export KONG_LICENSE_DATA='LICENSE-CONTENTS-GO-HERE'
-
Run the quickstart script:
curl -Ls https://get.konghq.com/quickstart | bash -s -- -e KONG_LICENSE_DATA
Once Kong Gateway is ready, you will see the following message:
Kong Gateway Ready
decK
decK is a CLI tool for managing Kong Gateway declaratively with state files. To complete this tutorial you will first need to install decK.
Required entities
For this tutorial, you’ll need Kong Gateway entities, like Gateway Services and Routes, pre-configured. These entities are essential for Kong Gateway to function but installing them isn’t the focus of this guide. Follow these steps to pre-configure them:
-
Run the following command:
echo ' _format_version: "3.0" services: - name: example-service url: http://httpbin.konghq.com/anything routes: - name: example-route paths: - "/anything" service: name: example-service ' | deck gateway apply -
To learn more about entities, you can read our entities documentation.
Set up Keycloak
This tutorial requires an identity provider (IdP). If you don’t have one, you can use Keycloak. The steps will be similar in other standard identity providers.
Create a client
-
Install Keycloak (version 26 or later) on your platform.
For example, you can use the Keycloak Docker image:
docker run -p 8080:8080 \ -e KC_BOOTSTRAP_ADMIN_USERNAME=admin \ -e KC_BOOTSTRAP_ADMIN_PASSWORD=admin \ quay.io/keycloak/keycloak start-dev
-
Open the admin console.
The default URL of the console is
http://$YOUR_KEYCLOAK_HOST:8080/admin/master/console/
. - In the sidebar, open Clients, then click Create client.
- Configure the client:
Section |
Settings |
---|---|
General settings |
|
Capability config |
|
Login settings |
Valid redirect URIs: http://localhost:8000/*
|
Set up keys and credentials
- In your client, open the Credentials tab.
- Set Client Authenticator to Client ID and Secret.
- Copy the Client Secret.
- Switch to the Users menu and add a user.
- Open the user’s Credentials tab and add a password. Be sure to disable Temporary Password.
In this guide, we’re going to use an example user named alex
with the password doe
.
Export to environment variables
Export your client secret, client ID, and issuer URL to environment variables so that you can pass them more securely. For example:
export DECK_ISSUER=http://host.docker.internal:8080/realms/master
export DECK_CLIENT_ID=kong
export DECK_CLIENT_SECRET=UNT3GPzCKI7zUbhAmFSUGbj4wmiBDGiW
Enable the OpenID Connect plugin
Using the Keycloak and Kong Gateway configuration from the prerequisites, set up an instance of the OpenID Connect plugin. In this example, we’re using the simple password grant with authenticated groups.
Enable the OpenID Connect plugin on the example-service
Service:
echo '
_format_version: "3.0"
plugins:
- name: openid-connect
service: example-service
config:
issuer: "${{ env "DECK_ISSUER" }}"
client_id:
- "${{ env "DECK_CLIENT_ID" }}"
client_secret:
- "${{ env "DECK_CLIENT_SECRET" }}"
client_auth:
- client_secret_post
auth_methods:
- password
authenticated_groups_claim:
- scope
' | deck gateway apply -
In this example:
-
issuer
,client ID
,client secret
, andclient auth
: Settings that connect the plugin to your IdP (in this case, the sample Keycloak app). -
auth_methods
: Specifies that the plugin should use the password grant, for easy testing. -
authenticated_groups_claim
: Looks for a groups claim in an ACL.
Note: Setting
config.client_auth
toclient_secret_post
lets you easily test the connection to your IdP, but we recommend using a more secure auth method in production. You can use any of the supported client auth methods.
Validate the OpenID Connect plugin configuration
Request the Service with the basic authentication credentials created in the prerequisites:
curl -i -X GET "$KONNECT_PROXY_URL/anything" \
-u alex:doe
curl -i -X GET "http://localhost:8000/anything" \
-u alex:doe
You should get an HTTP 200
response with an X-Authenticated-Groups
header:
"X-Authenticated-Groups": "openid, email, profile"
Enable the ACL plugin and verify
Let’s try denying access to the openid
group first:
echo '
_format_version: "3.0"
plugins:
- name: acl
service: example-service
config:
deny:
- openid
' | deck gateway apply -
Try to access the /anything
Route:
curl -i -X GET "$KONNECT_PROXY_URL/anything" \
-u alex:doe
curl -i -X GET "http://localhost:8000/anything" \
-u alex:doe
You should get a 403 Forbidden
error code with the message You cannot consume this service
.
Now let’s allow access to the openid
group:
echo '
_format_version: "3.0"
plugins:
- name: acl
service: example-service
config:
allow:
- openid
' | deck gateway apply -
And try accessing the /anything
Route again:
curl -i -X GET "$KONNECT_PROXY_URL/anything" \
-u alex:doe
curl -i -X GET "http://localhost:8000/anything" \
-u alex:doe
This time, you should get a 200
response.
Cleanup
Clean up Konnect environment
If you created a new control plane and want to conserve your free trial credits or avoid unnecessary charges, delete the new control plane used in this tutorial.
Destroy the Kong Gateway container
curl -Ls https://get.konghq.com/quickstart | bash -s -- -d