Index: client/third_party/google/auth/compute_engine/credentials.py |
diff --git a/client/third_party/google/auth/compute_engine/credentials.py b/client/third_party/google/auth/compute_engine/credentials.py |
new file mode 100644 |
index 0000000000000000000000000000000000000000..572995690624adc30c3926fc93ba5f88b0137d7d |
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+++ b/client/third_party/google/auth/compute_engine/credentials.py |
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+# Copyright 2016 Google Inc. |
+# |
+# Licensed under the Apache License, Version 2.0 (the "License"); |
+# you may not use this file except in compliance with the License. |
+# You may obtain a copy of the License at |
+# |
+# http://www.apache.org/licenses/LICENSE-2.0 |
+# |
+# Unless required by applicable law or agreed to in writing, software |
+# distributed under the License is distributed on an "AS IS" BASIS, |
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
+# See the License for the specific language governing permissions and |
+# limitations under the License. |
+ |
+"""Google Compute Engine credentials. |
+ |
+This module provides authentication for application running on Google Compute |
+Engine using the Compute Engine metadata server. |
+ |
+""" |
+ |
+from google.auth import credentials |
+from google.auth import exceptions |
+from google.auth.compute_engine import _metadata |
+ |
+ |
+class Credentials(credentials.Scoped, credentials.Credentials): |
+ """Compute Engine Credentials. |
+ |
+ These credentials use the Google Compute Engine metadata server to obtain |
+ OAuth 2.0 access tokens associated with the instance's service account. |
+ |
+ For more information about Compute Engine authentication, including how |
+ to configure scopes, see the `Compute Engine authentication |
+ documentation`_. |
+ |
+ .. note:: Compute Engine instances can be created with scopes and therefore |
+ these credentials are considered to be 'scoped'. However, you can |
+ not use :meth:`~google.auth.credentials.ScopedCredentials.with_scopes` |
+ because it is not possible to change the scopes that the instance |
+ has. Also note that |
+ :meth:`~google.auth.credentials.ScopedCredentials.has_scopes` will not |
+ work until the credentials have been refreshed. |
+ |
+ .. _Compute Engine authentication documentation: |
+ https://cloud.google.com/compute/docs/authentication#using |
+ """ |
+ |
+ def __init__(self, service_account_email='default'): |
+ """ |
+ Args: |
+ service_account_email (str): The service account email to use, or |
+ 'default'. A Compute Engine instance may have multiple service |
+ accounts. |
+ """ |
+ super(Credentials, self).__init__() |
+ self._service_account_email = service_account_email |
+ |
+ def _retrieve_info(self, request): |
+ """Retrieve information about the service account. |
+ |
+ Updates the scopes and retrieves the full service account email. |
+ |
+ Args: |
+ request (google.auth.transport.Request): The object used to make |
+ HTTP requests. |
+ """ |
+ info = _metadata.get_service_account_info( |
+ request, |
+ service_account=self._service_account_email) |
+ |
+ self._service_account_email = info['email'] |
+ self._scopes = info['scopes'] |
+ |
+ def refresh(self, request): |
+ """Refresh the access token and scopes. |
+ |
+ Args: |
+ request (google.auth.transport.Request): The object used to make |
+ HTTP requests. |
+ |
+ Raises: |
+ google.auth.exceptions.RefreshError: If the Compute Engine metadata |
+ service can't be reached if if the instance has not |
+ credentials. |
+ """ |
+ try: |
+ self._retrieve_info(request) |
+ self.token, self.expiry = _metadata.get_service_account_token( |
+ request, |
+ service_account=self._service_account_email) |
+ except exceptions.TransportError as exc: |
+ raise exceptions.RefreshError(exc) |
+ |
+ @property |
+ def service_account_email(self): |
+ """The service account email. |
+ |
+ .. note: This is not guaranteed to be set until :meth`refresh` has been |
+ called. |
+ """ |
+ return self._service_account_email |
+ |
+ @property |
+ def requires_scopes(self): |
+ """False: Compute Engine credentials can not be scoped.""" |
+ return False |
+ |
+ def with_scopes(self, scopes): |
+ """Unavailable, Compute Engine credentials can not be scoped. |
+ |
+ Scopes can only be set at Compute Engine instance creation time. |
+ See the `Compute Engine authentication documentation`_ for details on |
+ how to configure instance scopes. |
+ |
+ .. _Compute Engine authentication documentation: |
+ https://cloud.google.com/compute/docs/authentication#using |
+ """ |
+ raise NotImplementedError( |
+ 'Compute Engine credentials can not set scopes. Scopes must be ' |
+ 'set when the Compute Engine instance is created.') |