170 lines
5.7 KiB
Python
170 lines
5.7 KiB
Python
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# Copyright 2016 Google LLC
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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"""Helpers for transitioning from oauth2client to google-auth.
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.. warning::
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This module is private as it is intended to assist first-party downstream
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clients with the transition from oauth2client to google-auth.
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"""
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from __future__ import absolute_import
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import six
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from google.auth import _helpers
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import google.auth.app_engine
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import google.auth.compute_engine
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import google.oauth2.credentials
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import google.oauth2.service_account
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try:
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import oauth2client.client # type: ignore
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import oauth2client.contrib.gce # type: ignore
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import oauth2client.service_account # type: ignore
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except ImportError as caught_exc:
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six.raise_from(ImportError("oauth2client is not installed."), caught_exc)
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try:
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import oauth2client.contrib.appengine # type: ignore
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_HAS_APPENGINE = True
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except ImportError:
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_HAS_APPENGINE = False
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_CONVERT_ERROR_TMPL = "Unable to convert {} to a google-auth credentials class."
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def _convert_oauth2_credentials(credentials):
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"""Converts to :class:`google.oauth2.credentials.Credentials`.
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Args:
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credentials (Union[oauth2client.client.OAuth2Credentials,
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oauth2client.client.GoogleCredentials]): The credentials to
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convert.
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Returns:
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google.oauth2.credentials.Credentials: The converted credentials.
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"""
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new_credentials = google.oauth2.credentials.Credentials(
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token=credentials.access_token,
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refresh_token=credentials.refresh_token,
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token_uri=credentials.token_uri,
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client_id=credentials.client_id,
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client_secret=credentials.client_secret,
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scopes=credentials.scopes,
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)
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new_credentials._expires = credentials.token_expiry
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return new_credentials
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def _convert_service_account_credentials(credentials):
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"""Converts to :class:`google.oauth2.service_account.Credentials`.
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Args:
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credentials (Union[
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oauth2client.service_account.ServiceAccountCredentials,
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oauth2client.service_account._JWTAccessCredentials]): The
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credentials to convert.
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Returns:
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google.oauth2.service_account.Credentials: The converted credentials.
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"""
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info = credentials.serialization_data.copy()
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info["token_uri"] = credentials.token_uri
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return google.oauth2.service_account.Credentials.from_service_account_info(info)
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def _convert_gce_app_assertion_credentials(credentials):
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"""Converts to :class:`google.auth.compute_engine.Credentials`.
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Args:
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credentials (oauth2client.contrib.gce.AppAssertionCredentials): The
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credentials to convert.
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Returns:
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google.oauth2.service_account.Credentials: The converted credentials.
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"""
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return google.auth.compute_engine.Credentials(
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service_account_email=credentials.service_account_email
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)
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def _convert_appengine_app_assertion_credentials(credentials):
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"""Converts to :class:`google.auth.app_engine.Credentials`.
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Args:
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credentials (oauth2client.contrib.app_engine.AppAssertionCredentials):
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The credentials to convert.
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Returns:
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google.oauth2.service_account.Credentials: The converted credentials.
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"""
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# pylint: disable=invalid-name
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return google.auth.app_engine.Credentials(
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scopes=_helpers.string_to_scopes(credentials.scope),
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service_account_id=credentials.service_account_id,
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)
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_CLASS_CONVERSION_MAP = {
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oauth2client.client.OAuth2Credentials: _convert_oauth2_credentials,
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oauth2client.client.GoogleCredentials: _convert_oauth2_credentials,
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oauth2client.service_account.ServiceAccountCredentials: _convert_service_account_credentials,
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oauth2client.service_account._JWTAccessCredentials: _convert_service_account_credentials,
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oauth2client.contrib.gce.AppAssertionCredentials: _convert_gce_app_assertion_credentials,
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}
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if _HAS_APPENGINE:
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_CLASS_CONVERSION_MAP[
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oauth2client.contrib.appengine.AppAssertionCredentials
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] = _convert_appengine_app_assertion_credentials
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def convert(credentials):
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"""Convert oauth2client credentials to google-auth credentials.
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This class converts:
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- :class:`oauth2client.client.OAuth2Credentials` to
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:class:`google.oauth2.credentials.Credentials`.
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- :class:`oauth2client.client.GoogleCredentials` to
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:class:`google.oauth2.credentials.Credentials`.
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- :class:`oauth2client.service_account.ServiceAccountCredentials` to
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:class:`google.oauth2.service_account.Credentials`.
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- :class:`oauth2client.service_account._JWTAccessCredentials` to
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:class:`google.oauth2.service_account.Credentials`.
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- :class:`oauth2client.contrib.gce.AppAssertionCredentials` to
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:class:`google.auth.compute_engine.Credentials`.
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- :class:`oauth2client.contrib.appengine.AppAssertionCredentials` to
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:class:`google.auth.app_engine.Credentials`.
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Returns:
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google.auth.credentials.Credentials: The converted credentials.
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Raises:
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ValueError: If the credentials could not be converted.
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"""
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credentials_class = type(credentials)
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try:
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return _CLASS_CONVERSION_MAP[credentials_class](credentials)
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except KeyError as caught_exc:
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new_exc = ValueError(_CONVERT_ERROR_TMPL.format(credentials_class))
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six.raise_from(new_exc, caught_exc)
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