Archived
159 lines
5.1 KiB
Python
159 lines
5.1 KiB
Python
import logging
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import provider.oauth2
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from django.contrib.auth.models import AnonymousUser, User
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from django.utils import timezone
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from provider.oauth2.models import AccessToken, Client
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from tastypie.authentication import ApiKeyAuthentication, Authentication
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from tastypie.http import HttpUnauthorized
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class OAuth20Authentication(Authentication):
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"""
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OAuth authenticator.
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This Authentication method checks for a provided HTTP_AUTHORIZATION
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and looks up to see if this is a valid OAuth Access Token
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"""
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def __init__(self, realm='API'):
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self.realm = realm
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def is_authenticated(self, request, **kwargs):
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"""
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Verify 2-legged oauth request. Parameters accepted as
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values in "Authorization" header, or as a GET request
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or in a POST body.
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"""
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logging.info("OAuth20Authentication")
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try:
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key = request.GET.get('oauth_consumer_key')
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if not key:
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key = request.POST.get('oauth_consumer_key')
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if not key:
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auth_header_value = request.META.get('HTTP_AUTHORIZATION')
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if auth_header_value:
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if 'Authorization' in auth_header_value:
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key = auth_header_value.split(': ')[1].split(" ")[1]
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else:
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key = auth_header_value.split(' ')[1]
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if not key:
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logging.info('OAuth20Authentication. No consumer_key found.')
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return None
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"""
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If verify_access_token() does not pass, it will raise an error
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"""
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token = verify_access_token(key)
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# If OAuth authentication is successful, set the request user to the token user for authorization
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request.user = token.user
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# If OAuth authentication is successful, set oauth_consumer_key on request in case we need it later
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request.META['oauth_consumer_key'] = key
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return True
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except KeyError, e:
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logging.exception("Error in OAuth20Authentication.")
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request.user = AnonymousUser()
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return False
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except Exception, e:
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logging.exception("Error in OAuth20Authentication.")
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return False
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return True
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def verify_access_token(key):
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# Check if key is in AccessToken key
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try:
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token = AccessToken.objects.get(token=key)
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# Check if token has expired
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if token.expires < timezone.now():
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raise OAuthError('AccessToken has expired.')
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except AccessToken.DoesNotExist, e:
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raise OAuthError("AccessToken not found at all.")
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logging.info('Valid access')
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return token
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def create_access_token(user):
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# Create a Oauth2 Client (each test gets a new one)
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oauth2_client = Client.objects.create(
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user=user,
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name="example.com testclient",
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client_type=1, # ??
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url="http://example.com")
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# Create a Oauth2 AccessToken (each test gets a new one)
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access_token = AccessToken(user=user, client=oauth2_client)
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access_token.save()
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# Return HTTP authorization header
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return "Authorization: OAuth {}".format(access_token.token)
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class MyApiKeyAuthentication(ApiKeyAuthentication):
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"""
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Override method below to use our custom User model
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"""
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def is_authenticated(self, request, **kwargs):
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"""
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Finds the user and checks their API key.
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Should return either ``True`` if allowed, ``False`` if not or an
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``HttpResponse`` if you need something custom.
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"""
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# Ninjafix to get our custom model working
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from django.contrib.auth import get_user_model
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User = get_user_model()
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username_field = User.USERNAME_FIELD
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try:
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username, api_key = self.extract_credentials(request)
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except ValueError:
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return self._unauthorized()
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if not username or not api_key:
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return self._unauthorized()
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try:
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lookup_kwargs = {username_field: username}
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user = User.objects.get(**lookup_kwargs)
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except (User.DoesNotExist, User.MultipleObjectsReturned):
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return self._unauthorized()
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if not self.check_active(user):
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return False
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key_auth_check = self.get_key(user, api_key)
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if key_auth_check and not isinstance(key_auth_check, HttpUnauthorized):
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request.user = user
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return key_auth_check
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class ServiceAuthentication(Authentication):
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pass
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#
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# TODO auth for services
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#
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#def is_authenticated(self, request, **kwargs):
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# return True
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# return False
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"""
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This is a simple OAuth 2.0 authentication model for tastypie
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Copied nearly verbatim from amrox's example
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- https://github.com/amrox/django-tastypie-two-legged-oauth
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Dependencies:
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- django-oauth2-provider: https://github.com/caffeinehit/django-oauth2-provider
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Example:
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- http://ianalexandr.com
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"""
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# stolen from piston
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class OAuthError(RuntimeError):
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"""Generic exception class."""
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def __init__(self, message='OAuth error occured.'):
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self.message = message
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