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authorS. Solomon Darnell2025-03-28 21:52:21 -0500
committerS. Solomon Darnell2025-03-28 21:52:21 -0500
commit4a52a71956a8d46fcb7294ac71734504bb09bcc2 (patch)
treeee3dc5af3b6313e921cd920906356f5d4febc4ed /.venv/lib/python3.12/site-packages/google/auth/_default_async.py
parentcc961e04ba734dd72309fb548a2f97d67d578813 (diff)
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+# Copyright 2020 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.
+"""
+
+import io
+import json
+import os
+
+from google.auth import _default
+from google.auth import environment_vars
+from google.auth import exceptions
+
+
+def load_credentials_from_file(filename, scopes=None, quota_project_id=None):
+    """Loads Google credentials from a file.
+
+    The credentials file must be a service account key or stored authorized
+    user 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
+        quota_project_id (Optional[str]):  The project ID used for
+                quota and billing.
+
+    Returns:
+        Tuple[google.auth.credentials.Credentials, Optional[str]]: Loaded
+            credentials and the project ID. Authorized user credentials do not
+            have the project ID information.
+
+    Raises:
+        google.auth.exceptions.DefaultCredentialsError: if the file is in the
+            wrong format or is missing.
+    """
+    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
+
+    # The type key should indicate that the file is either a service account
+    # credentials file or an authorized user credentials file.
+    credential_type = info.get("type")
+
+    if credential_type == _default._AUTHORIZED_USER_TYPE:
+        from google.oauth2 import _credentials_async as 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
+        if quota_project_id:
+            credentials = credentials.with_quota_project(quota_project_id)
+        if not credentials.quota_project_id:
+            _default._warn_about_problematic_credentials(credentials)
+        return credentials, None
+
+    elif credential_type == _default._SERVICE_ACCOUNT_TYPE:
+        from google.oauth2 import _service_account_async as service_account
+
+        try:
+            credentials = service_account.Credentials.from_service_account_info(
+                info, scopes=scopes
+            ).with_quota_project(quota_project_id)
+        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")
+
+    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=_default._VALID_TYPES
+            )
+        )
+
+
+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
+
+    # Check if application default credentials exist.
+    credentials_filename = _cloud_sdk.get_application_default_credentials_path()
+
+    if not os.path.isfile(credentials_filename):
+        return None, None
+
+    credentials, project_id = load_credentials_from_file(
+        credentials_filename, quota_project_id=quota_project_id
+    )
+
+    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)
+
+    if explicit_file is not None 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.
+        return _get_gcloud_sdk_credentials(quota_project_id=quota_project_id)
+
+    if explicit_file is not None:
+        credentials, project_id = load_credentials_from_file(
+            os.environ[environment_vars.CREDENTIALS], quota_project_id=quota_project_id
+        )
+
+        return credentials, project_id
+
+    else:
+        return None, None
+
+
+def _get_gae_credentials():
+    """Gets Google App Engine App Identity credentials and project ID."""
+    # While this library is normally bundled with app_engine, there are
+    # some cases where it's not available, so we tolerate ImportError.
+
+    return _default._get_gae_credentials()
+
+
+def _get_gce_credentials(request=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.
+
+    return _default._get_gce_credentials(request)
+
+
+def default_async(scopes=None, request=None, quota_project_id=None):
+    """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).
+    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
+
+    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 (google.auth.transport.Request): An object used to make
+            HTTP requests. This is used to detect whether the application
+            is running on Compute Engine. If not specified, then it will
+            use the standard library http client to make requests.
+        quota_project_id (Optional[str]):  The project ID used for
+            quota and billing.
+    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_async 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 = (
+        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),
+    )
+
+    for checker in checkers:
+        credentials, project_id = checker()
+        if credentials is not None:
+            credentials = with_scopes_if_required(credentials, scopes)
+            if quota_project_id and isinstance(
+                credentials, CredentialsWithQuotaProject
+            ):
+                credentials = credentials.with_quota_project(quota_project_id)
+            effective_project_id = explicit_project_id or project_id
+            if not effective_project_id:
+                _default._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(_default._CLOUD_SDK_MISSING_CREDENTIALS)