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OpenID Connect Playground

Little POC about OpenID Connect and OAuth 2.0 using KeyCloak and Python3

Setup

KeyCloak

Firt of all we need to install an OIDC (OpenID Connect) server (Identity Provider).

For convenience we will use KeyCloak in a Docker container. Here below the necessary steps to setup our IdP:

docker run -p 8080:8080 --name kc-idp \
  -e KEYCLOAK_USER=user \
  -e KEYCLOAK_PASSWORD=password \
  -e DB_VENDOR=H2 \
  -d jboss/keycloak

Check if KeyCloak is up&running

$ docker ps
CONTAINER ID        IMAGE               COMMAND                  CREATED             STATUS              PORTS                    NAMES
7c7b2d8b513a        jboss/keycloak      "/opt/jboss/tools/do…"   7 seconds ago       Up 5 seconds        0.0.0.0:7777->8080/tcp   kc-idp

Now we will configure the client (our python app) into KeyCloak
We need to copy the script to the Docker container and run it

git clone [email protected]:binc75/oidcFlask.git
cd oidcFlask/
docker cp keycloak-setup.sh kc-idp:/opt/jboss/keycloak-setup.sh
docker exec kc-idp /opt/jboss/keycloak-setup.sh

# Get secret TOKEN for client
export APP_TOKEN=$(docker exec kc-idp /opt/jboss/keycloak/bin/kcreg.sh get "mypyapp" --server http://localhost:8080/auth  --realm master | jq -r '.secret')

Create app configuration file

cat client_secrets-template.json | envsubst > client_secrets.json

Create a new user for testing

docker exec kc-idp /opt/jboss/keycloak/bin/add-user-keycloak.sh -u nbianchi -p abc123 -r master
docker restart kc-idp

...alternatively you can also use the script kc_user_add.py

Flask app setup

Create virtualenv

python3 -m venv env
source env/bin/activate
pip install -r requirements.txt --no-cache
./mypyapp.py

...go and visit http://localhost:5000 !

(user: nbianchi, pass: abc123 or user: ppallino, pass:test1 if you used the script kc_user_add.py)

Get Autorization server public key

...to validate JWT on jwt.io

curl -s http://localhost:8080/auth/realms/master/ | jq -r .public_key