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Viewing File: _oauth2client.py
# Copyright 2016 Google LLC
#
# 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.
"""Helpers for transitioning from oauth2client to google-auth.
.. warning::
This module is private as it is intended to assist first-party downstream
clients with the transition from oauth2client to google-auth.
"""
from __future__ import absolute_import
from google.auth import _helpers
import google.auth.app_engine
import google.auth.compute_engine
import google.oauth2.credentials
import google.oauth2.service_account
try:
import oauth2client.client # type: ignore
import oauth2client.contrib.gce # type: ignore
import oauth2client.service_account # type: ignore
except ImportError as caught_exc:
raise ImportError("oauth2client is not installed.") from caught_exc
try:
import oauth2client.contrib.appengine # type: ignore
_HAS_APPENGINE = True
except ImportError:
_HAS_APPENGINE = False
_CONVERT_ERROR_TMPL = "Unable to convert {} to a google-auth credentials class."
def _convert_oauth2_credentials(credentials):
"""Converts to :class:`google.oauth2.credentials.Credentials`.
Args:
credentials (Union[oauth2client.client.OAuth2Credentials,
oauth2client.client.GoogleCredentials]): The credentials to
convert.
Returns:
google.oauth2.credentials.Credentials: The converted credentials.
"""
new_credentials = google.oauth2.credentials.Credentials(
token=credentials.access_token,
refresh_token=credentials.refresh_token,
token_uri=credentials.token_uri,
client_id=credentials.client_id,
client_secret=credentials.client_secret,
scopes=credentials.scopes,
)
new_credentials._expires = credentials.token_expiry
return new_credentials
def _convert_service_account_credentials(credentials):
"""Converts to :class:`google.oauth2.service_account.Credentials`.
Args:
credentials (Union[
oauth2client.service_account.ServiceAccountCredentials,
oauth2client.service_account._JWTAccessCredentials]): The
credentials to convert.
Returns:
google.oauth2.service_account.Credentials: The converted credentials.
"""
info = credentials.serialization_data.copy()
info["token_uri"] = credentials.token_uri
return google.oauth2.service_account.Credentials.from_service_account_info(info)
def _convert_gce_app_assertion_credentials(credentials):
"""Converts to :class:`google.auth.compute_engine.Credentials`.
Args:
credentials (oauth2client.contrib.gce.AppAssertionCredentials): The
credentials to convert.
Returns:
google.oauth2.service_account.Credentials: The converted credentials.
"""
return google.auth.compute_engine.Credentials(
service_account_email=credentials.service_account_email
)
def _convert_appengine_app_assertion_credentials(credentials):
"""Converts to :class:`google.auth.app_engine.Credentials`.
Args:
credentials (oauth2client.contrib.app_engine.AppAssertionCredentials):
The credentials to convert.
Returns:
google.oauth2.service_account.Credentials: The converted credentials.
"""
# pylint: disable=invalid-name
return google.auth.app_engine.Credentials(
scopes=_helpers.string_to_scopes(credentials.scope),
service_account_id=credentials.service_account_id,
)
_CLASS_CONVERSION_MAP = {
oauth2client.client.OAuth2Credentials: _convert_oauth2_credentials,
oauth2client.client.GoogleCredentials: _convert_oauth2_credentials,
oauth2client.service_account.ServiceAccountCredentials: _convert_service_account_credentials,
oauth2client.service_account._JWTAccessCredentials: _convert_service_account_credentials,
oauth2client.contrib.gce.AppAssertionCredentials: _convert_gce_app_assertion_credentials,
}
if _HAS_APPENGINE:
_CLASS_CONVERSION_MAP[
oauth2client.contrib.appengine.AppAssertionCredentials
] = _convert_appengine_app_assertion_credentials
def convert(credentials):
"""Convert oauth2client credentials to google-auth credentials.
This class converts:
- :class:`oauth2client.client.OAuth2Credentials` to
:class:`google.oauth2.credentials.Credentials`.
- :class:`oauth2client.client.GoogleCredentials` to
:class:`google.oauth2.credentials.Credentials`.
- :class:`oauth2client.service_account.ServiceAccountCredentials` to
:class:`google.oauth2.service_account.Credentials`.
- :class:`oauth2client.service_account._JWTAccessCredentials` to
:class:`google.oauth2.service_account.Credentials`.
- :class:`oauth2client.contrib.gce.AppAssertionCredentials` to
:class:`google.auth.compute_engine.Credentials`.
- :class:`oauth2client.contrib.appengine.AppAssertionCredentials` to
:class:`google.auth.app_engine.Credentials`.
Returns:
google.auth.credentials.Credentials: The converted credentials.
Raises:
ValueError: If the credentials could not be converted.
"""
credentials_class = type(credentials)
try:
return _CLASS_CONVERSION_MAP[credentials_class](credentials)
except KeyError as caught_exc:
new_exc = ValueError(_CONVERT_ERROR_TMPL.format(credentials_class))
raise new_exc from caught_exc
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