django-oidc-provider/oidc_provider/lib/endpoints/introspection.py

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import logging
from django.http import JsonResponse
from oidc_provider.lib.errors import TokenIntrospectionError
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from oidc_provider.lib.utils.common import run_processing_hook
from oidc_provider.lib.utils.oauth2 import extract_client_auth
from oidc_provider.models import Token, Client
from oidc_provider import settings
logger = logging.getLogger(__name__)
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INTROSPECTION_SCOPE = 'token_introspection'
class TokenIntrospectionEndpoint(object):
def __init__(self, request):
self.request = request
self.params = {}
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self.id_token = None
self.client = None
self._extract_params()
def _extract_params(self):
# Introspection only supports POST requests
self.params['token'] = self.request.POST.get('token')
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client_id, client_secret = extract_client_auth(self.request)
self.params['client_id'] = client_id
self.params['client_secret'] = client_secret
def validate_params(self):
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if not (self.params['client_id'] and self.params['client_secret']):
logger.debug('[Introspection] No client credentials provided')
raise TokenIntrospectionError()
if not self.params['token']:
logger.debug('[Introspection] No token provided')
raise TokenIntrospectionError()
try:
token = Token.objects.get(access_token=self.params['token'])
except Token.DoesNotExist:
logger.debug('[Introspection] Token does not exist: %s', self.params['token'])
raise TokenIntrospectionError()
if token.has_expired():
logger.debug('[Introspection] Token is not valid: %s', self.params['token'])
raise TokenIntrospectionError()
if not token.id_token:
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logger.debug('[Introspection] Token not an authentication token: %s',
self.params['token'])
raise TokenIntrospectionError()
self.id_token = token.id_token
audience = self.id_token.get('aud')
if not audience:
logger.debug('[Introspection] No audience found for token: %s', self.params['token'])
raise TokenIntrospectionError()
try:
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self.client = Client.objects.get(
client_id=self.params['client_id'],
client_secret=self.params['client_secret'])
except Client.DoesNotExist:
logger.debug('[Introspection] No valid client for id: %s',
self.params['client_id'])
raise TokenIntrospectionError()
if INTROSPECTION_SCOPE not in self.client.scope:
logger.debug('[Introspection] Client %s does not have introspection scope',
self.params['client_id'])
raise TokenIntrospectionError()
if settings.get('OIDC_INTROSPECTION_VALIDATE_AUDIENCE_SCOPE') \
and audience not in self.client.scope:
logger.debug('[Introspection] Client %s does not audience scope %s',
self.params['client_id'], audience)
raise TokenIntrospectionError()
def create_response_dic(self):
response_dic = dict((k, self.id_token[k]) for k in ('sub', 'exp', 'iat', 'iss'))
response_dic['active'] = True
response_dic['client_id'] = self.id_token.get('aud')
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response_dic['aud'] = self.client.client_id
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response_dic = run_processing_hook(response_dic,
'OIDC_INTROSPECTION_PROCESSING_HOOK',
client=self.client,
id_token=self.id_token)
return response_dic
@classmethod
def response(cls, dic, status=200):
"""
Create and return a response object.
"""
response = JsonResponse(dic, status=status)
response['Cache-Control'] = 'no-store'
response['Pragma'] = 'no-cache'
return response