keycloak

Open Source Identity and Access Management.

https://www.keycloak.org/

OIDC

https://www.scottbrady91.com/OpenID-Connect/OpenID-Connect-Overview

OpenID Connect (OIDC) provides a simple identity layer on top of the OAuth 2.0 protocol, enabling Single Sign-On (SSO) and API access in one round trip. It brings the missing user authentication story and identity layer to OAuth.

Steps setup realm

   1 cd /tmp
   2 wget https://github.com/keycloak/keycloak/releases/download/14.0.0/keycloak-14.0.0.zip
   3 unzip -t keycloak-14.0.0.zip
   4 unzip keycloak-14.0.0.zip
   5 cd ~/tmp/keycloak-14.0.0/bin
   6 sh standalone.sh 
   7 http://localhost:8080/auth

Create admin user

http://localhost:8080/auth
Administration Console
User: admin
Password: admin
Password confirmation: admin
Click on Create

Create realm

http://localhost:8080/auth/admin/master/console/#/realms/master
login with admin:admin
http://localhost:8080/auth/admin/master/console/#/create/realm
Name: MyRealm
Enabled: On
Click on Create

Add user myuser

http://localhost:8080/auth/admin/master/console/#/realms/MyRealm
Go to Users
Click on Add user
Username: myuser
User enabled: ON
Save

Add user mysubtaskuser

http://localhost:8080/auth/admin/master/console/#/realms/MyRealm
Go to Users
Click on Add user
Username: mysubtaskuser
User enabled: ON
Save

Set user password myuser

http://localhost:8080/auth/admin/master/console/#/realms/MyRealm/users
Select user myuser
Select credentials tab
Password: mypwd
Password confirmation: mypwd
Temporary: off
Click on "Set Password"

Set user password mysubtaskuser

http://localhost:8080/auth/admin/master/console/#/realms/MyRealm/users
Select user mysubtaskuser
Select credentials tab
Password: mypwd2
Password confirmation: mypwd2
Temporary: off
Click on "Set Password"

Create role USER

http://localhost:8080/auth/admin/master/console/#/create/role/MyRealm
Add role USER to MyRealm
Role name: USER
Click on Save

Create role USERSUBTASK

http://localhost:8080/auth/admin/master/console/#/create/role/MyRealm
Add role USERSUBTASK to MyRealm
Role name: USERSUBTASK
Click on Save

Associate role to user myuser

http://localhost:8080/auth/admin/master/console/#/realms/MyRealm/users
select user myuser
select tab Role mappings
select USER role and click on add selected

Associate role to user mysubtaskuser

http://localhost:8080/auth/admin/master/console/#/realms/MyRealm/users
select user mysubtaskuser
select tab Role mappings
select USERSUBTASK role and click on add selected

Create keycloak client

http://localhost:8080/auth/admin/master/console/#/realms/MyRealm/clients
click on create
client id: curl_confidential
client protocol: openid-connect
root url: http://localhost:8080
Click on save
Clients Curl_confidential settings:
access-type: confidential
Should appear tab Credentials
Client authenticator: Client ID and secret
Click on "Regenerate Secret"
# 3a862f1b-6687-4f7a-8e04-be494fca99e0
Clients Curl_confidential Mappers Add builtin "realm roles", "groups"
add selected
For each map add "Add to userinfo"
Clients Curl_confidential Scope,
select full scope allowed: ON

client data

realm: MyRealm
user pwd: myuser mypwd
client id: curl_confidential
protocol: openid-connect
Curl_confidential settings:
access-type confidential
valid redirect url http://localhost:8080
tab credentials: regenerate secret 3a862f1b-6687-4f7a-8e04-be494fca99e0

Signout

http://localhost:8080/auth/realms/MyRealm/account/

cUrl calls to test keycloak

   1 ACCESS_TOKEN=$(curl -d 'client_id=curl_confidential' -d 'client_secret=3a862f1b-6687-4f7a-8e04-be494fca99e0' -d 'username=myuser' -d 'password=mypwd' -d 'grant_type=password' 'http://localhost:8080/auth/realms/MyRealm/protocol/openid-connect/token' | json_reformat | jq -r '.access_token')
   2 echo $ACCESS_TOKEN
   3 
   4 curl -X POST -d "access_token=$ACCESS_TOKEN" http://localhost:8080/auth/realms/MyRealm/protocol/openid-connect/userinfo | json_reformat
   5 
   6 curl -X GET -d "access_token=$ACCESS_TOKEN" http://localhost:8080/auth/realms/MyRealm/.well-known/openid-configuration | json_reformat

   1 CLIENT_ID="curl_confidential"
   2 CLIENT_SECRET="3a862f1b-6687-4f7a-8e04-be494fca99e0"
   3 TOKEN=$(curl -d "client_id=$CLIENT_ID" -d "client_secret=$CLIENT_SECRET" -d 'username=myuser' -d 'password=mypwd' -d 'grant_type=password' 'http://localhost:8080/auth/realms/MyRealm/protocol/openid-connect/token' | json_reformat)
   4 
   5 ACCESS_TOKEN=$(echo $TOKEN | jq -r '.access_token')
   6 REFRESH_TOKEN=$(echo $TOKEN | jq -r '.refresh_token')
   7 
   8 curl -X POST -d "access_token=$ACCESS_TOKEN" http://localhost:8080/auth/realms/MyRealm/protocol/openid-connect/userinfo
   9 
  10 curl -vvv -d "client_id=$CLIENT_ID" -d "client_secret=$CLIENT_SECRET" -d "refresh_token=$REFRESH_TOKEN" -H "Bearer: $ACCESS_TOKEN" 'http://localhost:8080/auth/realms/MyRealm/protocol/openid-connect/logout'
  11 
  12 curl -X POST -d "access_token=$ACCESS_TOKEN" http://localhost:8080/auth/realms/MyRealm/protocol/openid-connect/userinfo
  13 #
  14

Setup keycloak as service in Raspberry pi

/etc/init.d/keycloak

   1 #! /bin/sh
   2 ### BEGIN INIT INFO
   3 # Provides:          keycloak
   4 # Default-Start:     2 3 4 5
   5 # Default-Stop:
   6 # Short-Description: keycloak
   7 # Description:       keycloak
   8 ### END INIT INFO
   9 #
  10 # Some things that run always
  11 touch /var/lock/keycloak
  12 # Carry out specific functions when asked to by the system
  13 case "$1" in
  14   start)
  15     echo "Starting script keycloak "
  16     su pi -c "nohup /home/pi/keycloak-14.0.0/bin/standalone.sh &"
  17     ;;
  18   stop)
  19     echo "Stopping script keycloak"
  20     kill $(ps uax | grep keycloak | grep java | awk '//{print $2}')
  21     ;;
  22   status)
  23     echo "keycloak PID: $(ps uax | grep keycloak | grep java | awk '//{print $2}')"
  24     ;;
  25   *)
  26     echo "Usage: /etc/init.d/keycloak {start|stop|status}"
  27     exit 1
  28     ;;
  29 esac
  30 
  31 exit 0