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# Copyright 2020 Google LLC
#
# 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 mock
import pytest # type: ignore
from google.auth import exceptions
from google.auth.transport import _mtls_helper
from google.auth.transport import mtls
@mock.patch("google.auth.transport._mtls_helper._check_config_path", autospec=True)
def test_has_default_client_cert_source(check_config_path):
def return_path_for_metadata(path):
return mock.Mock() if path == _mtls_helper.CONTEXT_AWARE_METADATA_PATH else None
check_config_path.side_effect = return_path_for_metadata
assert mtls.has_default_client_cert_source()
def return_path_for_cert_config(path):
return (
mock.Mock()
if path == _mtls_helper.CERTIFICATE_CONFIGURATION_DEFAULT_PATH
else None
)
check_config_path.side_effect = return_path_for_cert_config
assert mtls.has_default_client_cert_source()
check_config_path.side_effect = None
check_config_path.return_value = None
assert not mtls.has_default_client_cert_source()
@mock.patch("google.auth.transport._mtls_helper.get_client_cert_and_key", autospec=True)
@mock.patch("google.auth.transport.mtls.has_default_client_cert_source", autospec=True)
def test_default_client_cert_source(
has_default_client_cert_source, get_client_cert_and_key
):
# Test default client cert source doesn't exist.
has_default_client_cert_source.return_value = False
with pytest.raises(exceptions.MutualTLSChannelError):
mtls.default_client_cert_source()
# The following tests will assume default client cert source exists.
has_default_client_cert_source.return_value = True
# Test good callback.
get_client_cert_and_key.return_value = (True, b"cert", b"key")
callback = mtls.default_client_cert_source()
assert callback() == (b"cert", b"key")
# Test bad callback which throws exception.
get_client_cert_and_key.side_effect = ValueError()
callback = mtls.default_client_cert_source()
with pytest.raises(exceptions.MutualTLSChannelError):
callback()
@mock.patch(
"google.auth.transport._mtls_helper.get_client_ssl_credentials", autospec=True
)
@mock.patch("google.auth.transport.mtls.has_default_client_cert_source", autospec=True)
def test_default_client_encrypted_cert_source(
has_default_client_cert_source, get_client_ssl_credentials
):
# Test default client cert source doesn't exist.
has_default_client_cert_source.return_value = False
with pytest.raises(exceptions.MutualTLSChannelError):
mtls.default_client_encrypted_cert_source("cert_path", "key_path")
# The following tests will assume default client cert source exists.
has_default_client_cert_source.return_value = True
# Test good callback.
get_client_ssl_credentials.return_value = (True, b"cert", b"key", b"passphrase")
callback = mtls.default_client_encrypted_cert_source("cert_path", "key_path")
with mock.patch("{}.open".format(__name__), return_value=mock.MagicMock()):
assert callback() == ("cert_path", "key_path", b"passphrase")
# Test bad callback which throws exception.
get_client_ssl_credentials.side_effect = exceptions.ClientCertError()
callback = mtls.default_client_encrypted_cert_source("cert_path", "key_path")
with pytest.raises(exceptions.MutualTLSChannelError):
callback()
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