1 files changed, 311 insertions, 0 deletions
diff --git a/tests/oauth2/test_id_token.py b/tests/oauth2/test_id_token.py
new file mode 100644
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+++ b/tests/oauth2/test_id_token.py
@@ -0,0 +1,311 @@
+# 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
+
+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"