Add support for single-sign on using python-social-auth (with Google/Github OAuth2 and SAML support). Add support for RADIUS as another authentication backend.

awx/sso/middleware.py

@@ -0,0 +1,90 @@
+# Copyright (c) 2015 Ansible, Inc.
+# All Rights Reserved.
+
+# Python
+import urllib
+
+# Six
+import six
+
+# Django
+from django.contrib.auth import logout
+from django.shortcuts import redirect
+from django.utils.timezone import now
+
+# Python Social Auth
+from social.exceptions import SocialAuthBaseException
+from social.utils import social_logger
+from social.apps.django_app.middleware import SocialAuthExceptionMiddleware
+
+from awx.main.models import AuthToken
+
+class SocialAuthMiddleware(SocialAuthExceptionMiddleware):
+
+    def process_request(self, request):
+        request.META['SERVER_PORT'] = 80 # FIXME
+
+        token_key = request.COOKIES.get('token', '')
+        token_key = urllib.quote(urllib.unquote(token_key).strip('"'))
+
+        if not hasattr(request, 'successful_authenticator'):
+            request.successful_authenticator = None
+
+        if not request.path.startswith('/sso/'):
+
+            # If token isn't present but we still have a user logged in via Django
+            # sessions, log them out.
+            if not token_key and request.user and request.user.is_authenticated():
+                logout(request)
+
+            # If a token is present, make sure it matches a valid one in the
+            # database, and log the user via Django session if necessary.
+            # Otherwise, log the user out via Django sessions.
+            elif token_key:
+
+                try:
+                    auth_token = AuthToken.objects.filter(key=token_key, expires__gt=now())[0]
+                except IndexError:
+                    auth_token = None
+
+                if not auth_token and request.user and request.user.is_authenticated():
+                    logout(request)
+                elif auth_token and request.user != auth_token.user:
+                    logout(request)
+                    login(request, auth_token.user)
+                    auth_token.refresh()
+
+                if auth_token and request.user and request.user.is_authenticated():
+                    request.session.pop('social_auth_error', None)
+
+    def process_exception(self, request, exception):
+        strategy = getattr(request, 'social_strategy', None)
+        if strategy is None or self.raise_exception(request, exception):
+            return
+
+        if isinstance(exception, SocialAuthBaseException):
+            backend = getattr(request, 'backend', None)
+            backend_name = getattr(backend, 'name', 'unknown-backend')
+            full_backend_name = backend_name
+            try:
+                idp_name = strategy.request_data()['RelayState']
+                full_backend_name = '%s:%s' % (backend_name, idp_name)
+            except KeyError:
+                pass
+
+            message = self.get_message(request, exception)
+            social_logger.error(message)
+
+            url = self.get_redirect_uri(request, exception)
+            request.session['social_auth_error'] = (full_backend_name, message)
+            return redirect(url)
+
+    def get_message(self, request, exception):
+        msg = six.text_type(exception)
+        if msg and msg[-1] not in '.?!':
+            msg = msg + '.'
+        return msg
+
+    def get_redirect_uri(self, request, exception):
+        strategy = getattr(request, 'social_strategy', None)
+        return strategy.session_get('next', '')  or strategy.setting('LOGIN_ERROR_URL')