1 files changed, 11 insertions, 15 deletions
diff --git a/rest_framework/authentication.py b/rest_framework/authentication.py
index 8f4ec536..145d4295 100644
--- a/rest_framework/authentication.py
+++ b/rest_framework/authentication.py
@@ -2,14 +2,16 @@
 Provides a set of pluggable authentication policies.
 """
 from __future__ import unicode_literals
+import base64
+from datetime import datetime
+
 from django.contrib.auth import authenticate
 from django.core.exceptions import ImproperlyConfigured
 from rest_framework import exceptions, HTTP_HEADER_ENCODING
 from rest_framework.compat import CsrfViewMiddleware
 from rest_framework.compat import oauth, oauth_provider, oauth_provider_store
-from rest_framework.compat import oauth2_provider, oauth2_provider_forms, oauth2_provider_backends
+from rest_framework.compat import oauth2_provider, oauth2_provider_forms
 from rest_framework.authtoken.models import Token
-import base64
 
 
 def get_authorization_header(request):
@@ -315,21 +317,15 @@ class OAuth2Authentication(BaseAuthentication):
         Authenticate the request, given the access token.
         """
 
-        # Authenticate the client
-        oauth2_client_form = oauth2_provider_forms.ClientAuthForm(request.REQUEST)
-        if not oauth2_client_form.is_valid():
-            raise exceptions.AuthenticationFailed('Client could not be validated')
-        client = oauth2_client_form.cleaned_data.get('client')
-
-        # Retrieve the `OAuth2AccessToken` instance from the access_token
-        auth_backend = oauth2_provider_backends.AccessTokenBackend()
-        token = auth_backend.authenticate(access_token, client)
-        if token is None:
+        try:
+            token = oauth2_provider.models.AccessToken.objects.select_related('user')
+            # TODO: Change to timezone aware datetime when oauth2_provider add
+            # support to it.
+            token = token.get(token=access_token, expires__gt=datetime.now())
+        except oauth2_provider.models.AccessToken.DoesNotExist:
             raise exceptions.AuthenticationFailed('Invalid token')
 
-        user = token.user
-
-        if not user.is_active:
+        if not token.user.is_active:
             msg = 'User inactive or deleted: %s' % user.username
             raise exceptions.AuthenticationFailed(msg)