/usr/lib/python2.7/dist-packages/google/auth/app_engine.py is in python-google-auth 1.3.0-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 | # 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 App Engine standard environment support.
This module provides authentication and signing for applications running on App
Engine in the standard environment using the `App Identity API`_.
.. _App Identity API:
https://cloud.google.com/appengine/docs/python/appidentity/
"""
import datetime
from google.auth import _helpers
from google.auth import credentials
from google.auth import crypt
try:
from google.appengine.api import app_identity
except ImportError:
app_identity = None
class Signer(crypt.Signer):
"""Signs messages using the App Engine App Identity service.
This can be used in place of :class:`google.auth.crypt.Signer` when
running in the App Engine standard environment.
"""
@property
def key_id(self):
"""Optional[str]: The key ID used to identify this private key.
.. warning::
This is always ``None``. The key ID used by App Engine can not
be reliably determined ahead of time.
"""
return None
@_helpers.copy_docstring(crypt.Signer)
def sign(self, message):
message = _helpers.to_bytes(message)
_, signature = app_identity.sign_blob(message)
return signature
def get_project_id():
"""Gets the project ID for the current App Engine application.
Returns:
str: The project ID
Raises:
EnvironmentError: If the App Engine APIs are unavailable.
"""
# pylint: disable=missing-raises-doc
# Pylint rightfully thinks EnvironmentError is OSError, but doesn't
# realize it's a valid alias.
if app_identity is None:
raise EnvironmentError(
'The App Engine APIs are not available.')
return app_identity.get_application_id()
class Credentials(credentials.Scoped, credentials.Signing,
credentials.Credentials):
"""App Engine standard environment credentials.
These credentials use the App Engine App Identity API to obtain access
tokens.
"""
def __init__(self, scopes=None, service_account_id=None):
"""
Args:
scopes (Sequence[str]): Scopes to request from the App Identity
API.
service_account_id (str): The service account ID passed into
:func:`google.appengine.api.app_identity.get_access_token`.
If not specified, the default application service account
ID will be used.
Raises:
EnvironmentError: If the App Engine APIs are unavailable.
"""
# pylint: disable=missing-raises-doc
# Pylint rightfully thinks EnvironmentError is OSError, but doesn't
# realize it's a valid alias.
if app_identity is None:
raise EnvironmentError(
'The App Engine APIs are not available.')
super(Credentials, self).__init__()
self._scopes = scopes
self._service_account_id = service_account_id
self._signer = Signer()
@_helpers.copy_docstring(credentials.Credentials)
def refresh(self, request):
# pylint: disable=unused-argument
token, ttl = app_identity.get_access_token(
self._scopes, self._service_account_id)
expiry = datetime.datetime.utcfromtimestamp(ttl)
self.token, self.expiry = token, expiry
@property
def service_account_email(self):
"""The service account email."""
if self._service_account_id is None:
self._service_account_id = app_identity.get_service_account_name()
return self._service_account_id
@property
def requires_scopes(self):
"""Checks if the credentials requires scopes.
Returns:
bool: True if there are no scopes set otherwise False.
"""
return not self._scopes
@_helpers.copy_docstring(credentials.Scoped)
def with_scopes(self, scopes):
return Credentials(
scopes=scopes, service_account_id=self._service_account_id)
@_helpers.copy_docstring(credentials.Signing)
def sign_bytes(self, message):
return self._signer.sign(message)
@property
@_helpers.copy_docstring(credentials.Signing)
def signer_email(self):
return self.service_account_email
@property
@_helpers.copy_docstring(credentials.Signing)
def signer(self):
return self._signer
|