text: # Copyright 2014 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.
  
  import json
  import os
  
  import mock
  import pytest  # type: ignore
  
  from google.auth import environment_vars
  from google.auth import exceptions
  from google.auth import transport
  from google.oauth2 import id_token
  from google.oauth2 import service_account
  
  SERVICE_ACCOUNT_FILE = os.path.join(
      os.path.dirname(__file__), "../data/service_account.json"
  )
  ID_TOKEN_AUDIENCE = "https://pubsub.googleapis.com"
  
  
  def make_request(status, data=None):
      response = mock.create_autospec(transport.Response, instance=True)
      response.status = status
  
      if data is not None:
          response.data = json.dumps(data).encode("utf-8")
  
      request = mock.create_autospec(transport.Request)
      request.return_value = response
      return request
  
  
  def test__fetch_certs_success():
      certs = {"1": "cert"}
      request = make_request(200, certs)
  
      returned_certs = id_token._fetch_certs(request, mock.sentinel.cert_url)
  
      request.assert_called_once_with(mock.sentinel.cert_url, method="GET")
      assert returned_certs == certs
  
  
  def test__fetch_certs_failure():
      request = make_request(404)
  
      with pytest.raises(exceptions.TransportError):
          id_token._fetch_certs(request, mock.sentinel.cert_url)
  
      request.assert_called_once_with(mock.sentinel.cert_url, method="GET")
  
  
  @mock.patch("google.auth.jwt.decode", autospec=True)
  @mock.patch("google.oauth2.id_token._fetch_certs", autospec=True)
  def test_verify_token(_fetch_certs, decode):
      result = id_token.verify_token(mock.sentinel.token, mock.sentinel.request)
  
      assert result == decode.return_value
      _fetch_certs.assert_called_once_with(
          mock.sentinel.request, id_token._GOOGLE_OAUTH2_CERTS_URL
      )
      decode.assert_called_once_with(
          mock.sentinel.token,
          certs=_fetch_certs.return_value,
          audience=None,
          clock_skew_in_seconds=0,
      )
  
  
  @mock.patch("google.auth.jwt.decode", autospec=True)
  @mock.patch("google.oauth2.id_token._fetch_certs", autospec=True)
  def test_verify_token_args(_fetch_certs, decode):
      result = id_token.verify_token(
          mock.sentinel.token,
          mock.sentinel.request,
          audience=mock.sentinel.audience,
          certs_url=mock.sentinel.certs_url,
      )
  
      assert result == decode.return_value
      _fetch_certs.assert_called_once_with(mock.sentinel.request, mock.sentinel.certs_url)
      decode.assert_called_once_with(
          mock.sentinel.token,
          certs=_fetch_certs.return_value,
          audience=mock.sentinel.audience,
          clock_skew_in_seconds=0,
      )
  
  
  @mock.patch("google.auth.jwt.decode", autospec=True)
  @mock.patch("google.oauth2.id_token._fetch_certs", autospec=True)
  def test_verify_token_clock_skew(_fetch_certs, decode):
      result = id_token.verify_token(
          mock.sentinel.token,
          mock.sentinel.request,
          audience=mock.sentinel.audience,
          certs_url=mock.sentinel.certs_url,
          clock_skew_in_seconds=10,
      )
  
      assert result == decode.return_value
      _fetch_certs.assert_called_once_with(mock.sentinel.request, mock.sentinel.certs_url)
      decode.assert_called_once_with(
          mock.sentinel.token,
          certs=_fetch_certs.return_value,
          audience=mock.sentinel.audience,
          clock_skew_in_seconds=10,
      )
  
  
  @mock.patch("google.oauth2.id_token.verify_token", autospec=True)
  def test_verify_oauth2_token(verify_token):
      verify_token.return_value = {"iss": "accounts.google.com"}
      result = id_token.verify_oauth2_token(
          mock.sentinel.token, mock.sentinel.request, audience=mock.sentinel.audience
      )
  
      assert result == verify_token.return_value
      verify_token.assert_called_once_with(
          mock.sentinel.token,
          mock.sentinel.request,
          audience=mock.sentinel.audience,
          certs_url=id_token._GOOGLE_OAUTH2_CERTS_URL,
          clock_skew_in_seconds=0,
      )
  
  
  @mock.patch("google.oauth2.id_token.verify_token", autospec=True)
  def test_verify_oauth2_token_clock_skew(verify_token):
      verify_token.return_value = {"iss": "accounts.google.com"}
      result = id_token.verify_oauth2_token(
          mock.sentinel.token,
          mock.sentinel.request,
          audience=mock.sentinel.audience,
          clock_skew_in_seconds=10,
      )
  
      assert result == verify_token.return_value
      verify_token.assert_called_once_with(
          mock.sentinel.token,
          mock.sentinel.request,
          audience=mock.sentinel.audience,
          certs_url=id_token._GOOGLE_OAUTH2_CERTS_URL,
          clock_skew_in_seconds=10,
      )
  
  
  @mock.patch("google.oauth2.id_token.verify_token", autospec=True)
  def test_verify_oauth2_token_invalid_iss(verify_token):
      verify_token.return_value = {"iss": "invalid_issuer"}
  
      with pytest.raises(exceptions.GoogleAuthError):
          id_token.verify_oauth2_token(
              mock.sentinel.token, mock.sentinel.request, audience=mock.sentinel.audience
          )
  
  
  @mock.patch("google.oauth2.id_token.verify_token", autospec=True)
  def test_verify_firebase_token(verify_token):
      result = id_token.verify_firebase_token(
          mock.sentinel.token, mock.sentinel.request, audience=mock.sentinel.audience
      )
  
      assert result == verify_token.return_value
      verify_token.assert_called_once_with(
          mock.sentinel.token,
          mock.sentinel.request,
          audience=mock.sentinel.audience,
          certs_url=id_token._GOOGLE_APIS_CERTS_URL,
          clock_skew_in_seconds=0,
      )
  
  
  @mock.patch("google.oauth2.id_token.verify_token", autospec=True)
  def test_verify_firebase_token_clock_skew(verify_token):
      result = id_token.verify_firebase_token(
          mock.sentinel.token,
          mock.sentinel.request,
          audience=mock.sentinel.audience,
          clock_skew_in_seconds=10,
      )
  
      assert result == verify_token.return_value
      verify_token.assert_called_once_with(
          mock.sentinel.token,
          mock.sentinel.request,
          audience=mock.sentinel.audience,
          certs_url=id_token._GOOGLE_APIS_CERTS_URL,
          clock_skew_in_seconds=10,
      )
  
  
  def test_fetch_id_token_credentials_optional_request(monkeypatch):
      monkeypatch.delenv(environment_vars.CREDENTIALS, raising=False)
  
      # Test a request object is created if not provided
      with mock.patch("google.auth.compute_engine._metadata.ping", return_value=True):
          with mock.patch(
              "google.auth.compute_engine.IDTokenCredentials.__init__", return_value=None
          ):
              with mock.patch(
                  "google.auth.transport.requests.Request.__init__", return_value=None
              ) as mock_request:
                  id_token.fetch_id_token_credentials(ID_TOKEN_AUDIENCE)
              mock_request.assert_called()
  
  
  def test_fetch_id_token_credentials_from_metadata_server(monkeypatch):
      monkeypatch.delenv(environment_vars.CREDENTIALS, raising=False)
  
      mock_req = mock.Mock()
  
      with mock.patch("google.auth.compute_engine._metadata.ping", return_value=True):
          with mock.patch(
              "google.auth.compute_engine.IDTokenCredentials.__init__", return_value=None
          ) as mock_init:
              id_token.fetch_id_token_credentials(ID_TOKEN_AUDIENCE, request=mock_req)
          mock_init.assert_called_once_with(
              mock_req, ID_TOKEN_AUDIENCE, use_metadata_identity_endpoint=True
          )
  
  
  def test_fetch_id_token_credentials_from_explicit_cred_json_file(monkeypatch):
      monkeypatch.setenv(environment_vars.CREDENTIALS, SERVICE_ACCOUNT_FILE)
  
      cred = id_token.fetch_id_token_credentials(ID_TOKEN_AUDIENCE)
      assert isinstance(cred, service_account.IDTokenCredentials)
      assert cred._target_audience == ID_TOKEN_AUDIENCE
  
  
  def test_fetch_id_token_credentials_no_cred_exists(monkeypatch):
      monkeypatch.delenv(environment_vars.CREDENTIALS, raising=False)
  
      with mock.patch(
          "google.auth.compute_engine._metadata.ping",
          side_effect=exceptions.TransportError(),
      ):
          with pytest.raises(exceptions.DefaultCredentialsError) as excinfo:
              id_token.fetch_id_token_credentials(ID_TOKEN_AUDIENCE)
          assert excinfo.match(
              r"Neither metadata server or valid service account credentials are found."
          )
  
      with mock.patch("google.auth.compute_engine._metadata.ping", return_value=False):
          with pytest.raises(exceptions.DefaultCredentialsError) as excinfo:
              id_token.fetch_id_token_credentials(ID_TOKEN_AUDIENCE)
          assert excinfo.match(
              r"Neither metadata server or valid service account credentials are found."
          )
  
  
  def test_fetch_id_token_credentials_invalid_cred_file_type(monkeypatch):
      user_credentials_file = os.path.join(
          os.path.dirname(__file__), "../data/authorized_user.json"
      )
      monkeypatch.setenv(environment_vars.CREDENTIALS, user_credentials_file)
  
      with mock.patch("google.auth.compute_engine._metadata.ping", return_value=False):
          with pytest.raises(exceptions.DefaultCredentialsError) as excinfo:
              id_token.fetch_id_token_credentials(ID_TOKEN_AUDIENCE)
          assert excinfo.match(
              r"Neither metadata server or valid service account credentials are found."
          )
  
  
  def test_fetch_id_token_credentials_invalid_json(monkeypatch):
      not_json_file = os.path.join(os.path.dirname(__file__), "../data/public_cert.pem")
      monkeypatch.setenv(environment_vars.CREDENTIALS, not_json_file)
  
      with pytest.raises(exceptions.DefaultCredentialsError) as excinfo:
          id_token.fetch_id_token_credentials(ID_TOKEN_AUDIENCE)
      assert excinfo.match(
          r"GOOGLE_APPLICATION_CREDENTIALS is not valid service account credentials."
      )
  
  
  def test_fetch_id_token_credentials_invalid_cred_path(monkeypatch):
      not_json_file = os.path.join(os.path.dirname(__file__), "../data/not_exists.json")
      monkeypatch.setenv(environment_vars.CREDENTIALS, not_json_file)
  
      with pytest.raises(exceptions.DefaultCredentialsError) as excinfo:
          id_token.fetch_id_token_credentials(ID_TOKEN_AUDIENCE)
      assert excinfo.match(
          r"GOOGLE_APPLICATION_CREDENTIALS path is either not found or invalid."
      )
  
  
  def test_fetch_id_token(monkeypatch):
      mock_cred = mock.MagicMock()
      mock_cred.token = "token"
  
      mock_req = mock.Mock()
  
      with mock.patch(
          "google.oauth2.id_token.fetch_id_token_credentials", return_value=mock_cred
      ) as mock_fetch:
          token = id_token.fetch_id_token(mock_req, ID_TOKEN_AUDIENCE)
      mock_fetch.assert_called_once_with(ID_TOKEN_AUDIENCE, request=mock_req)
      mock_cred.refresh.assert_called_once_with(mock_req)
      assert token == "token"
  