setup

django-janus is an OAuth2 authorization server. The OpenID Connect Core 1.0 and Discovery 1.0 Standards are implemented.

installation

pip install git+https://github.com/smartlgt/django-janus#egg=django-janus

settings.py

add to installed apps:

INSTALLED_APPS = [
    # other apps
    
    #optional ldap auth
    'django_python3_ldap',
    
    'django.contrib.sites',
    'corsheaders',
    'oauth2_provider',
    'allauth',
    'allauth.account',
    'allauth.socialaccount',
    'janus',
    
]

Set a fix site ID or init the database table via manage commands:

SITE_ID = 1

Oauth config:

OAUTH2_PROVIDER_APPLICATION_MODEL = 'oauth2_provider.Application'

cors for web apps:

MIDDLEWARE = (
    # ...
    'corsheaders.middleware.CorsMiddleware',
    # ...
)


CORS_ORIGIN_ALLOW_ALL = True
// now limit the allow all to the following path:
CORS_URLS_REGEX = r"^/oauth2/.*$"

its possible to use any social login, reffer the allauth docs for configuration. Allauth config e.G.:

ACCOUNT_EMAIL_REQUIRED = False
ACCOUNT_UNIQUE_EMAIL = True
ACCOUNT_EMAIL_VERIFICATION = "optional"
ACCOUNT_AUTHENTICATION_METHOD = "username"
ACCOUNT_CONFIRM_EMAIL_ON_GET = True
ACCOUNT_EMAIL_CONFIRMATION_AUTHENTICATED_REDIRECT_URL = 'restart_authorize'
ACCOUNT_LOGOUT_ON_GET = True

E-Mail config e.G.:

EMAIL_USE_SSL = True
EMAIL_HOST = 'smtp.example.com'
EMAIL_HOST_USER = 'mail@example.com'
EMAIL_HOST_PASSWORD = '********'
EMAIL_PORT = 465
DEFAULT_FROM_EMAIL = 'name <mail@example.com>'

(recommended) cleanup old token

CELERY_BEAT_SCHEDULE = {
    'cleanup_token': {
        'task': 'janus.tasks.cleanup_token',
        'schedule': crontab(minute='1', hour='6')
    },
}

(optional) enable and configure OIDC

# Scope in which additional claims are included. These claims are is_staff, is_superuser and groups.
JANUS_OIDC_SCOPE_EXTRA = "profile" 
OAUTH2_PROVIDER = {
    "OIDC_ENABLED": True, # Enable OIDC
    "OIDC_ISS_ENDPOINT": "[...]",
    "OAUTH2_VALIDATOR_CLASS": "janus.oauth2.validator.JanusOAuth2Validator",
    "OIDC_RSA_PRIVATE_KEY": "[...]", # Generate with `openssl genrsa -out oidc.key 4096`
    "SCOPES": { # Claims are returned based on granted scopes. See OIDC Core section 5.4.
        "openid": "Connect with your Account",
        "profile": "Access your Name and Username",
        "email": "Access your Mail-Address",
    }
}

(optional) setup your ldap server

# The URL of the LDAP server.
LDAP_AUTH_URL = "ldap.exmaple.com"

# Initiate TLS on connection.
LDAP_AUTH_USE_TLS = True

# The LDAP search base for looking up users.
LDAP_AUTH_SEARCH_BASE = "OU=people,DC=example,DC=com"

# The LDAP class that represents a user.
LDAP_AUTH_OBJECT_CLASS = "inetOrgPerson"

# A tuple of django model fields used to uniquely identify a user.
LDAP_AUTH_USER_LOOKUP_FIELDS = ("username",)

# 
LDAP_AUTH_SYNC_PERMISSIONS = False

# define auth order
AUTHENTICATION_BACKENDS = (
    'django.contrib.auth.backends.ModelBackend', # try model auth first
    'django_python3_ldap.auth.LDAPBackend', # "fallback" to ldap authentifiaction
)

urls.py

urlpatterns = [
    path('admin/', admin.site.urls),
    path('accounts/', include('allauth.urls')),
    path('oauth2/', include('janus.urls')),
]

first run

migrate your database

./manage.py migrate

if you open a browser and look at the index page you should see Hello from janus on your screen.

usage

OAuth2 endpoints

o/authorize/

OAuth2 authorize endpoint

o/token/

OAuth2 access token endpoint

o/revoke_token/

OAuth2 revoke access or refresh tokens

o/introspect/

OAuth2 introspection endpoint. Requires introspect scope.

o/profile/

custom profile endpoint, returns user profile information as json:

{
  "id": "some_username",
  "first_name": "Jon",
  "last_name": "Doe",
  "name": "Jon Doe",
  "email": "mail@example.com",
  "email_verified": "True",
  "is_superuser": "False",
  "can_authenticate": "True",
  "groups": ["staff", "customer"]
}

extend profile response

Old

overwrite settings like this: ALLAUTH_JANUS_PROFILE_VIEW = 'app.views.ProfileViewCustom'

add a new profie view class and customize as needed

from janus.views import ProfileView
class ProfileViewCustom(ProfileView):

    def generate_json_data(self, user, application):
        data = super().generate_json_data(user, application)
        data['custom_values'] = user.custom_user_value
        return data

New (OIDC)

Extend JanusOAuth2Validator. You can then modify the response by adding additional information to the UserInfo service directly or by adding claims to the ID token. Then set the modified Validator as OAUTH2_VALIDATOR_CLASS in the OAUTH2_PROVIDER in the settings. See also the section on enable and configure OIDC for the configuration of the settings.

OIDC endpoints

o/userinfo/

UserInfo endpoint as per section 5.3 of OpenID Connect Core 1.0.

o/.well-known/openid-configuration/

OpenID Provider Configuration endpoint as per section 4 of OpenID Connect Discovery 1.0.

o/.well-known/jwks.json

JSON Web Key Set endpoint as per section 3 of OpenID Connect Discovery 1.0.

admin custom user class

set ALLAUTH_JANUS_ADMIN_CLASS = 'app.admin_custom.CustomUserAdmin'

from janus.admin import JanusUserAdmin
class CustomUserAdmin(JanusUserAdmin):

    fieldsets = JanusUserAdmin.fieldsets + (
        ("Custom Area", {'fields': ('some_field',)}),
    )

configuration

• navigate to /admin/ to setup the OAuth2 uids and secrets.

setup a profile group and add permissions

setup your first group, eg. default and set the default flag. all new user will be added to the default flag. for testing, you may need to add the default group for the first admin user by hand.

as a second step you need to authorize your app by mapping a "Can authenticate" flag between the application and the new default group. see Group permissions for that.

you can also add a single permission for a user without the need of generating groups. see: Profile permissions

there is an option to provide Application groups for a application based on profiles or group permission these groups get returned to the application on the profile call.