# Copyright 2015 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.

"""Application default credentials.

Implements application default credentials and project ID detection.

"""

from __future__ import annotations

import io

import json

import logging

import os

from typing import Optional, Sequence, TYPE_CHECKING

import warnings

from google.auth import environment_vars

from google.auth import exceptions

import google.auth.transport._http_client

if TYPE_CHECKING: # pragma: NO COVER

from google.auth.credentials import Credentials # noqa: F401

from google.auth.transport import Request # noqa: F401

_LOGGER = logging.getLogger(__name__)

# Valid types accepted for file-based credentials.

_AUTHORIZED_USER_TYPE = "authorized_user"

_SERVICE_ACCOUNT_TYPE = "service_account"

_EXTERNAL_ACCOUNT_TYPE = "external_account"

_EXTERNAL_ACCOUNT_AUTHORIZED_USER_TYPE = "external_account_authorized_user"

_IMPERSONATED_SERVICE_ACCOUNT_TYPE = "impersonated_service_account"

_GDCH_SERVICE_ACCOUNT_TYPE = "gdch_service_account"

_VALID_TYPES = (

_AUTHORIZED_USER_TYPE,

_SERVICE_ACCOUNT_TYPE,

_EXTERNAL_ACCOUNT_TYPE,

_EXTERNAL_ACCOUNT_AUTHORIZED_USER_TYPE,

_IMPERSONATED_SERVICE_ACCOUNT_TYPE,

_GDCH_SERVICE_ACCOUNT_TYPE,

)

# Help message when no credentials can be found.

_CLOUD_SDK_MISSING_CREDENTIALS = """\

Your default credentials were not found. To set up Application Default Credentials, \

see https://cloud.google.com/docs/authentication/external/set-up-adc for more information.\

"""

# Warning when using Cloud SDK user credentials

_CLOUD_SDK_CREDENTIALS_WARNING = """\

Your application has authenticated using end user credentials from Google \

Cloud SDK without a quota project. You might receive a "quota exceeded" \

or "API not enabled" error. See the following page for troubleshooting: \

https://cloud.google.com/docs/authentication/adc-troubleshooting/user-creds. \

"""

_GENERIC_LOAD_METHOD_WARNING = """\

The {} method is deprecated because of a potential security risk.

This method does not validate the credential configuration. The security

risk occurs when a credential configuration is accepted from a source that

is not under your control and used without validation on your side.

If you know that you will be loading credential configurations of a

specific type, it is recommended to use a credential-type-specific

load method.

This will ensure that an unexpected credential type with potential for

malicious intent is not loaded unintentionally. You might still have to do

validation for certain credential types. Please follow the recommendations

for that method. For example, if you want to load only service accounts,

you can create the service account credentials explicitly:

```

from google.oauth2 import service_account

creds = service_account.Credentials.from_service_account_file(filename)

```

If you are loading your credential configuration from an untrusted source and have

not mitigated the risks (e.g. by validating the configuration yourself), make

these changes as soon as possible to prevent security risks to your environment.

Regardless of the method used, it is always your responsibility to validate

configurations received from external sources.

Refer to https://cloud.google.com/docs/authentication/external/externally-sourced-credentials

for more details.

"""

# The subject token type used for AWS external_account credentials.

_AWS_SUBJECT_TOKEN_TYPE = "urn:ietf:params:aws:token-type:aws4_request"

def _warn_about_problematic_credentials(credentials):

"""Determines if the credentials are problematic.

Credentials from the Cloud SDK that are associated with Cloud SDK's project

are problematic because they may not have APIs enabled and have limited

quota. If this is the case, warn about it.

"""

from google.auth import _cloud_sdk

if credentials.client_id == _cloud_sdk.CLOUD_SDK_CLIENT_ID:

warnings.warn(_CLOUD_SDK_CREDENTIALS_WARNING)

def _warn_about_generic_load_method(method_name): # pragma: NO COVER

"""Warns that a generic load method is being used.

This is to discourage use of the generic load methods in favor of

more specific methods. The generic methods are more likely to lead to

security issues if the input is not validated.

Args:

method_name (str): The name of the method being used.

"""

warnings.warn(_GENERIC_LOAD_METHOD_WARNING.format(method_name), DeprecationWarning)

def load_credentials_from_file(

filename, scopes=None, default_scopes=None, quota_project_id=None, request=None

):

"""Loads Google credentials from a file.

The credentials file must be a service account key, stored authorized

user credentials, external account credentials, or impersonated service

account credentials.

.. warning::

Important: If you accept a credential configuration (credential JSON/File/Stream)

from an external source for authentication to Google Cloud Platform, you must

validate it before providing it to any Google API or client library. Providing an

unvalidated credential configuration to Google APIs or libraries can compromise

the security of your systems and data. For more information, refer to

`Validate credential configurations from external sources`_.

.. _Validate credential configurations from external sources:

https://cloud.google.com/docs/authentication/external/externally-sourced-credentials

Args:

filename (str): The full path to the credentials file.

scopes (Optional[Sequence[str]]): The list of scopes for the credentials. If

specified, the credentials will automatically be scoped if

necessary

default_scopes (Optional[Sequence[str]]): Default scopes passed by a

Google client library. Use 'scopes' for user-defined scopes.

quota_project_id (Optional[str]): The project ID used for

quota and billing.

request (Optional[google.auth.transport.Request]): An object used to make

HTTP requests. This is used to determine the associated project ID

for a workload identity pool resource (external account credentials).

If not specified, then it will use a

google.auth.transport.requests.Request client to make requests.

Returns:

Tuple[google.auth.credentials.Credentials, Optional[str]]: Loaded

credentials and the project ID. Authorized user credentials do not

have the project ID information. External account credentials project

IDs may not always be determined.

Raises:

google.auth.exceptions.DefaultCredentialsError: if the file is in the

wrong format or is missing.

"""

_warn_about_generic_load_method("load_credentials_from_file")

if not os.path.exists(filename):

raise exceptions.DefaultCredentialsError(

"File {} was not found.".format(filename)

)

with io.open(filename, "r") as file_obj:

try:

info = json.load(file_obj)

except ValueError as caught_exc:

new_exc = exceptions.DefaultCredentialsError(

"File {} is not a valid json file.".format(filename), caught_exc

)

raise new_exc from caught_exc

return _load_credentials_from_info(

filename, info, scopes, default_scopes, quota_project_id, request

)

def load_credentials_from_dict(

info, scopes=None, default_scopes=None, quota_project_id=None, request=None

):

"""Loads Google credentials from a dict.

The credentials file must be a service account key, stored authorized

user credentials, external account credentials, or impersonated service

account credentials.

.. warning::

Important: If you accept a credential configuration (credential JSON/File/Stream)

from an external source for authentication to Google Cloud Platform, you must

validate it before providing it to any Google API or client library. Providing an

unvalidated credential configuration to Google APIs or libraries can compromise

the security of your systems and data. For more information, refer to

`Validate credential configurations from external sources`_.

.. _Validate credential configurations from external sources:

https://cloud.google.com/docs/authentication/external/externally-sourced-credentials

Args:

info (Dict[str, Any]): A dict object containing the credentials

scopes (Optional[Sequence[str]]): The list of scopes for the credentials. If

specified, the credentials will automatically be scoped if

necessary

default_scopes (Optional[Sequence[str]]): Default scopes passed by a

Google client library. Use 'scopes' for user-defined scopes.

quota_project_id (Optional[str]): The project ID used for

quota and billing.

request (Optional[google.auth.transport.Request]): An object used to make

HTTP requests. This is used to determine the associated project ID

for a workload identity pool resource (external account credentials).

If not specified, then it will use a

google.auth.transport.requests.Request client to make requests.

Returns:

Tuple[google.auth.credentials.Credentials, Optional[str]]: Loaded

credentials and the project ID. Authorized user credentials do not

have the project ID information. External account credentials project

IDs may not always be determined.

Raises:

google.auth.exceptions.DefaultCredentialsError: if the file is in the

wrong format or is missing.

"""

_warn_about_generic_load_method("load_credentials_from_dict")

if not isinstance(info, dict):

raise exceptions.DefaultCredentialsError(

"info object was of type {} but dict type was expected.".format(type(info))

)

return _load_credentials_from_info(

"dict object", info, scopes, default_scopes, quota_project_id, request

)

def _load_credentials_from_info(

filename, info, scopes, default_scopes, quota_project_id, request

):

from google.auth.credentials import CredentialsWithQuotaProject

credential_type = info.get("type")

if credential_type == _AUTHORIZED_USER_TYPE:

credentials, project_id = _get_authorized_user_credentials(

filename, info, scopes

)

elif credential_type == _SERVICE_ACCOUNT_TYPE:

credentials, project_id = _get_service_account_credentials(

filename, info, scopes, default_scopes

)

elif credential_type == _EXTERNAL_ACCOUNT_TYPE:

credentials, project_id = _get_external_account_credentials(

info,

filename,

scopes=scopes,

default_scopes=default_scopes,

request=request,

)

elif credential_type == _EXTERNAL_ACCOUNT_AUTHORIZED_USER_TYPE:

credentials, project_id = _get_external_account_authorized_user_credentials(

filename, info, request

)

elif credential_type == _IMPERSONATED_SERVICE_ACCOUNT_TYPE:

credentials, project_id = _get_impersonated_service_account_credentials(

filename, info, scopes

)

elif credential_type == _GDCH_SERVICE_ACCOUNT_TYPE:

credentials, project_id = _get_gdch_service_account_credentials(filename, info)

else:

raise exceptions.DefaultCredentialsError(

"The file {file} does not have a valid type. "

"Type is {type}, expected one of {valid_types}.".format(

file=filename, type=credential_type, valid_types=_VALID_TYPES

)

)

if isinstance(credentials, CredentialsWithQuotaProject):

credentials = _apply_quota_project_id(credentials, quota_project_id)

return credentials, project_id

def _get_gcloud_sdk_credentials(quota_project_id=None):

"""Gets the credentials and project ID from the Cloud SDK."""

from google.auth import _cloud_sdk

_LOGGER.debug("Checking Cloud SDK credentials as part of auth process...")

# Check if application default credentials exist.

credentials_filename = _cloud_sdk.get_application_default_credentials_path()

if not os.path.isfile(credentials_filename):

_LOGGER.debug("Cloud SDK credentials not found on disk; not using them")

return None, None

with warnings.catch_warnings():

warnings.simplefilter("ignore", DeprecationWarning)

credentials, project_id = load_credentials_from_file(

credentials_filename, quota_project_id=quota_project_id

)

credentials._cred_file_path = credentials_filename

if not project_id:

project_id = _cloud_sdk.get_project_id()

return credentials, project_id

def _get_explicit_environ_credentials(quota_project_id=None):

"""Gets credentials from the GOOGLE_APPLICATION_CREDENTIALS environment

variable."""

from google.auth import _cloud_sdk

cloud_sdk_adc_path = _cloud_sdk.get_application_default_credentials_path()

explicit_file = os.environ.get(environment_vars.CREDENTIALS, "")

_LOGGER.debug(

"Checking '%s' for explicit credentials as part of auth process...",

explicit_file,

)

if explicit_file != "" and explicit_file == cloud_sdk_adc_path:

# Cloud sdk flow calls gcloud to fetch project id, so if the explicit

# file path is cloud sdk credentials path, then we should fall back

# to cloud sdk flow, otherwise project id cannot be obtained.

_LOGGER.debug(

"Explicit credentials path '%s' is the same as Cloud SDK credentials path, fall back to Cloud SDK credentials flow...",

explicit_file,

)

return _get_gcloud_sdk_credentials(quota_project_id=quota_project_id)

if explicit_file != "":

with warnings.catch_warnings():

warnings.simplefilter("ignore", DeprecationWarning)

credentials, project_id = load_credentials_from_file(

os.environ[environment_vars.CREDENTIALS],

quota_project_id=quota_project_id,

)

credentials._cred_file_path = f"{explicit_file} file via the GOOGLE_APPLICATION_CREDENTIALS environment variable"

return credentials, project_id

else:

return None, None

def _get_gae_credentials():

"""Gets Google App Engine App Identity credentials and project ID."""

# If not GAE gen1, prefer the metadata service even if the GAE APIs are

# available as per https://google.aip.dev/auth/4115.

if os.environ.get(environment_vars.LEGACY_APPENGINE_RUNTIME) != "python27":

return None, None

# While this library is normally bundled with app_engine, there are

# some cases where it's not available, so we tolerate ImportError.

try:

_LOGGER.debug("Checking for App Engine runtime as part of auth process...")

import google.auth.app_engine as app_engine

except ImportError:

_LOGGER.warning("Import of App Engine auth library failed.")

return None, None

try:

credentials = app_engine.Credentials()

project_id = app_engine.get_project_id()

return credentials, project_id

except EnvironmentError:

_LOGGER.debug(

"No App Engine library was found so cannot authentication via App Engine Identity Credentials."

)

return None, None

def _get_gce_credentials(request=None, quota_project_id=None):

"""Gets credentials and project ID from the GCE Metadata Service."""

# Ping requires a transport, but we want application default credentials

# to require no arguments. So, we'll use the _http_client transport which

# uses http.client. This is only acceptable because the metadata server

# doesn't do SSL and never requires proxies.

# While this library is normally bundled with compute_engine, there are

# some cases where it's not available, so we tolerate ImportError.

try:

from google.auth import compute_engine

from google.auth.compute_engine import _metadata

except ImportError:

_LOGGER.warning("Import of Compute Engine auth library failed.")

return None, None

if request is None:

request = google.auth.transport._http_client.Request()

if _metadata.is_on_gce(request=request):

# Get the project ID.

try:

project_id = _metadata.get_project_id(request=request)

except exceptions.TransportError:

project_id = None

cred = compute_engine.Credentials()

cred = _apply_quota_project_id(cred, quota_project_id)

return cred, project_id

else:

_LOGGER.warning(

"Authentication failed using Compute Engine authentication due to unavailable metadata server."

)

return None, None

def _get_external_account_credentials(

info, filename, scopes=None, default_scopes=None, request=None

):

"""Loads external account Credentials from the parsed external account info.

The credentials information must correspond to a supported external account

credentials.

Args:

info (Mapping[str, str]): The external account info in Google format.

filename (str): The full path to the credentials file.

scopes (Optional[Sequence[str]]): The list of scopes for the credentials. If

specified, the credentials will automatically be scoped if

necessary.

default_scopes (Optional[Sequence[str]]): Default scopes passed by a

Google client library. Use 'scopes' for user-defined scopes.

request (Optional[google.auth.transport.Request]): An object used to make

HTTP requests. This is used to determine the associated project ID

for a workload identity pool resource (external account credentials).

If not specified, then it will use a

google.auth.transport.requests.Request client to make requests.

Returns:

Tuple[google.auth.credentials.Credentials, Optional[str]]: Loaded

credentials and the project ID. External account credentials project

IDs may not always be determined.

Raises:

google.auth.exceptions.DefaultCredentialsError: if the info dictionary

is in the wrong format or is missing required information.

"""

# There are currently 3 types of external_account credentials.

if info.get("subject_token_type") == _AWS_SUBJECT_TOKEN_TYPE:

# Check if configuration corresponds to an AWS credentials.

from google.auth import aws

credentials = aws.Credentials.from_info(

info, scopes=scopes, default_scopes=default_scopes

)

elif (

info.get("credential_source") is not None

and info.get("credential_source").get("executable") is not None

):

from google.auth import pluggable

credentials = pluggable.Credentials.from_info(

info, scopes=scopes, default_scopes=default_scopes

)

else:

try:

# Check if configuration corresponds to an Identity Pool credentials.

from google.auth import identity_pool

credentials = identity_pool.Credentials.from_info(

info, scopes=scopes, default_scopes=default_scopes

)

except ValueError:

# If the configuration is invalid or does not correspond to any

# supported external_account credentials, raise an error.

raise exceptions.DefaultCredentialsError(

"Failed to load external account credentials from {}".format(filename)

)

if request is None:

import google.auth.transport.requests

request = google.auth.transport.requests.Request()

return credentials, credentials.get_project_id(request=request)

def _get_external_account_authorized_user_credentials(

filename, info, scopes=None, default_scopes=None, request=None

):

try:

from google.auth import external_account_authorized_user

credentials = external_account_authorized_user.Credentials.from_info(info)

except ValueError:

raise exceptions.DefaultCredentialsError(

"Failed to load external account authorized user credentials from {}".format(

filename

)

)

return credentials, None

def _get_authorized_user_credentials(filename, info, scopes=None):

from google.oauth2 import credentials

try:

credentials = credentials.Credentials.from_authorized_user_info(

info, scopes=scopes

)

except ValueError as caught_exc:

msg = "Failed to load authorized user credentials from {}".format(filename)

new_exc = exceptions.DefaultCredentialsError(msg, caught_exc)

raise new_exc from caught_exc

return credentials, None

def _get_service_account_credentials(filename, info, scopes=None, default_scopes=None):

from google.oauth2 import service_account

try:

credentials = service_account.Credentials.from_service_account_info(

info, scopes=scopes, default_scopes=default_scopes

)

except ValueError as caught_exc:

msg = "Failed to load service account credentials from {}".format(filename)

new_exc = exceptions.DefaultCredentialsError(msg, caught_exc)

raise new_exc from caught_exc

return credentials, info.get("project_id")

def _get_impersonated_service_account_credentials(filename, info, scopes):

from google.auth import impersonated_credentials

try:

credentials = (

impersonated_credentials.Credentials.from_impersonated_service_account_info(

info, scopes=scopes

)

)

except ValueError as caught_exc:

msg = "Failed to load impersonated service account credentials from {}".format(

filename

)

new_exc = exceptions.DefaultCredentialsError(msg, caught_exc)

raise new_exc from caught_exc

return credentials, None

def _get_gdch_service_account_credentials(filename, info):

from google.oauth2 import gdch_credentials

try:

credentials = (

gdch_credentials.ServiceAccountCredentials.from_service_account_info(info)

)

except ValueError as caught_exc:

msg = "Failed to load GDCH service account credentials from {}".format(filename)

new_exc = exceptions.DefaultCredentialsError(msg, caught_exc)

raise new_exc from caught_exc

return credentials, info.get("project")

def get_api_key_credentials(key):

"""Return credentials with the given API key."""

from google.auth import api_key

return api_key.Credentials(key)

def _apply_quota_project_id(credentials, quota_project_id):

if quota_project_id:

credentials = credentials.with_quota_project(quota_project_id)

else:

credentials = credentials.with_quota_project_from_environment()

from google.oauth2 import credentials as authorized_user_credentials

if isinstance(credentials, authorized_user_credentials.Credentials) and (

not credentials.quota_project_id

):

_warn_about_problematic_credentials(credentials)

return credentials

def default(

scopes: Optional[Sequence[str]] = None,

request: Optional["google.auth.transport.Request"] = None,

quota_project_id: Optional[str] = None,

default_scopes: Optional[Sequence[str]] = None,

) -> tuple["google.auth.credentials.Credentials", Optional[str]]:

"""Gets the default credentials for the current environment.

`Application Default Credentials`_ provides an easy way to obtain

credentials to call Google APIs for server-to-server or local applications.

This function acquires credentials from the environment in the following

order:

1. If the environment variable ``GOOGLE_APPLICATION_CREDENTIALS`` is set

to the path of a valid service account JSON private key file, then it is

loaded and returned. The project ID returned is the project ID defined

in the service account file if available (some older files do not

contain project ID information).

If the environment variable is set to the path of a valid external

account JSON configuration file (workload identity federation), then the

configuration file is used to determine and retrieve the external

credentials from the current environment (AWS, Azure, etc).

These will then be exchanged for Google access tokens via the Google STS

endpoint.

The project ID returned in this case is the one corresponding to the

underlying workload identity pool resource if determinable.

If the environment variable is set to the path of a valid GDCH service

account JSON file (`Google Distributed Cloud Hosted`_), then a GDCH

credential will be returned. The project ID returned is the project

specified in the JSON file.

2. If the `Google Cloud SDK`_ is installed and has application default

credentials set they are loaded and returned.

To enable application default credentials with the Cloud SDK run::

gcloud auth application-default login

If the Cloud SDK has an active project, the project ID is returned. The

active project can be set using::

gcloud config set project

3. If the application is running in the `App Engine standard environment`_

(first generation) then the credentials and project ID from the

`App Identity Service`_ are used.

4. If the application is running in `Compute Engine`_ or `Cloud Run`_ or

the `App Engine flexible environment`_ or the `App Engine standard

environment`_ (second generation) then the credentials and project ID

are obtained from the `Metadata Service`_.

5. If no credentials are found,

:class:`~google.auth.exceptions.DefaultCredentialsError` will be raised.

.. _Application Default Credentials: https://developers.google.com\

/identity/protocols/application-default-credentials

.. _Google Cloud SDK: https://cloud.google.com/sdk

.. _App Engine standard environment: https://cloud.google.com/appengine

.. _App Identity Service: https://cloud.google.com/appengine/docs/python\

/appidentity/

.. _Compute Engine: https://cloud.google.com/compute

.. _App Engine flexible environment: https://cloud.google.com\

/appengine/flexible

.. _Metadata Service: https://cloud.google.com/compute/docs\

/storing-retrieving-metadata

.. _Cloud Run: https://cloud.google.com/run

.. _Google Distributed Cloud Hosted: https://cloud.google.com/blog/topics\

/hybrid-cloud/announcing-google-distributed-cloud-edge-and-hosted

Example::

import google.auth

credentials, project_id = google.auth.default()

Args:

scopes (Sequence[str]): The list of scopes for the credentials. If

specified, the credentials will automatically be scoped if

necessary.

request (Optional[google.auth.transport.Request]): An object used to make

HTTP requests. This is used to either detect whether the application

is running on Compute Engine or to determine the associated project

ID for a workload identity pool resource (external account

credentials). If not specified, then it will either use the standard

library http client to make requests for Compute Engine credentials

or a google.auth.transport.requests.Request client for external

account credentials.

quota_project_id (Optional[str]): The project ID used for

quota and billing.

default_scopes (Optional[Sequence[str]]): Default scopes passed by a

Google client library. Use 'scopes' for user-defined scopes.

Returns:

Tuple[~google.auth.credentials.Credentials, Optional[str]]:

the current environment's credentials and project ID. Project ID

may be None, which indicates that the Project ID could not be

ascertained from the environment.

Raises:

~google.auth.exceptions.DefaultCredentialsError:

If no credentials were found, or if the credentials found were

invalid.

"""

from google.auth.credentials import with_scopes_if_required

from google.auth.credentials import CredentialsWithQuotaProject

explicit_project_id = os.environ.get(

environment_vars.PROJECT, os.environ.get(environment_vars.LEGACY_PROJECT)

)

checkers = (

# Avoid passing scopes here to prevent passing scopes to user credentials.

# with_scopes_if_required() below will ensure scopes/default scopes are

# safely set on the returned credentials since requires_scopes will

# guard against setting scopes on user credentials.

lambda: _get_explicit_environ_credentials(quota_project_id=quota_project_id),

lambda: _get_gcloud_sdk_credentials(quota_project_id=quota_project_id),

_get_gae_credentials,

lambda: _get_gce_credentials(request, quota_project_id=quota_project_id),

)

for checker in checkers:

credentials, project_id = checker()

if credentials is not None:

credentials = with_scopes_if_required(

credentials, scopes, default_scopes=default_scopes

)

effective_project_id = explicit_project_id or project_id

# For external account credentials, scopes are required to determine

# the project ID. Try to get the project ID again if not yet

# determined.

if not effective_project_id and callable(

getattr(credentials, "get_project_id", None)

):

if request is None:

import google.auth.transport.requests

request = google.auth.transport.requests.Request()

effective_project_id = credentials.get_project_id(request=request)

if quota_project_id and isinstance(

credentials, CredentialsWithQuotaProject

):

credentials = credentials.with_quota_project(quota_project_id)

if not effective_project_id:

_LOGGER.warning(

"No project ID could be determined. Consider running "

"`gcloud config set project` or setting the %s "

"environment variable",

environment_vars.PROJECT,

)

return credentials, effective_project_id

raise exceptions.DefaultCredentialsError(_CLOUD_SDK_MISSING_CREDENTIALS)