Issue 1058 | Gateway: allow nested fields verification

gateway/api/authentication.py

@@ -71,9 +71,16 @@ def authenticate(self, request):
                 )
 
                 if verification_data is not None:
-                    verified = verification_data.get(
-                        settings.SETTINGS_TOKEN_AUTH_VERIFICATION_FIELD, False
-                    )
+                    verifications = []
+                    for (
+                        verification_field
+                    ) in settings.SETTINGS_TOKEN_AUTH_VERIFICATION_FIELD.split(";"):
+                        nested_field_value = verification_data
+                        for nested_field in verification_field.split(","):
+                            nested_field_value = nested_field_value.get(nested_field)
+                        verifications.append(nested_field_value)
+
+                    verified = all(verifications)
 
                     if user_id is not None and verified:
                         try:

gateway/main/settings.py

@@ -270,6 +270,20 @@
 SETTINGS_TOKEN_AUTH_VERIFICATION_URL = os.environ.get(
     "SETTINGS_TOKEN_AUTH_VERIFICATION_URL", None
 )
+# verification fields to check when returned from auth api
+# Example of checking multiple fields:
+#    For following verification data
+#    {
+#       "is_valid": true,
+#       "some": {
+#         "nested": {
+#           "field": true
+#         },
+#         "other": "bla"
+#       }
+#    }
+#   setting string will be:
+#    "SETTINGS_TOKEN_AUTH_VERIFICATION_FIELD", "is_valid;some,nested,field"
 SETTINGS_TOKEN_AUTH_VERIFICATION_FIELD = os.environ.get(
     "SETTINGS_TOKEN_AUTH_VERIFICATION_FIELD", None
 )

gateway/tests/api/test_authentication.py

@@ -43,3 +43,66 @@ def test_custom_token_authentication(self):
             self.assertEqual(token.token, b"AWESOME_TOKEN")
 
             self.assertEqual(user.username, "AwesomeUser")
+
+    @responses.activate
+    def test_with_nested_verification_fields(self):
+        """Tests custom token auth."""
+        responses.add(
+            responses.POST,
+            "http://token_auth_url",
+            json={"userId": "AwesomeUser", "id": "requestId"},
+            status=200,
+        )
+
+        responses.add(
+            responses.GET,
+            "http://token_auth_verification_url",
+            json={"is_valid": True, "other": {"nested": {"field": "something_here"}}},
+            status=200,
+        )
+
+        custom_auth = CustomTokenBackend()
+        request = MagicMock()
+        request.META.get.return_value = "Bearer AWESOME_TOKEN"
+
+        with self.settings(
+            SETTINGS_TOKEN_AUTH_URL="http://token_auth_url",
+            SETTINGS_TOKEN_AUTH_USER_FIELD="userId",
+            SETTINGS_TOKEN_AUTH_VERIFICATION_URL="http://token_auth_verification_url",
+            SETTINGS_TOKEN_AUTH_VERIFICATION_FIELD="is_valid;other,nested,field",
+        ):
+            user, token = custom_auth.authenticate(request)
+
+            self.assertIsInstance(token, CustomToken)
+            self.assertEqual(token.token, b"AWESOME_TOKEN")
+
+            self.assertEqual(user.username, "AwesomeUser")
+
+        with self.settings(
+            SETTINGS_TOKEN_AUTH_URL="http://token_auth_url",
+            SETTINGS_TOKEN_AUTH_USER_FIELD="userId",
+            SETTINGS_TOKEN_AUTH_VERIFICATION_URL="http://token_auth_verification_url",
+            SETTINGS_TOKEN_AUTH_VERIFICATION_FIELD="is_valid;other,WRONG_NESTED_FIELD",
+        ):
+            user, token = custom_auth.authenticate(request)
+
+            self.assertIsNone(user)
+            self.assertEqual(token.token, b"AWESOME_TOKEN")
+
+        responses.add(
+            responses.GET,
+            "http://token_auth_verification_url",
+            json={"is_valid": True, "other": "no nested fields"},
+            status=200,
+        )
+
+        with self.settings(
+            SETTINGS_TOKEN_AUTH_URL="http://token_auth_url",
+            SETTINGS_TOKEN_AUTH_USER_FIELD="userId",
+            SETTINGS_TOKEN_AUTH_VERIFICATION_URL="http://token_auth_verification_url",
+            SETTINGS_TOKEN_AUTH_VERIFICATION_FIELD="is_valid;other,nested,field",
+        ):
+            # this should raise an error as `SETTINGS_TOKEN_AUTH_VERIFICATION_FIELD`
+            # is not configured properly
+            with self.assertRaises(AttributeError):
+                custom_auth.authenticate(request)