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# Copyright 2021 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.
"""Tests for the reauth module."""
import base64
import sys
import mock
import pytest # type: ignore
import pyu2f # type: ignore
from google.auth import exceptions
from google.oauth2 import challenges
def test_get_user_password():
with mock.patch("getpass.getpass", return_value="foo"):
assert challenges.get_user_password("") == "foo"
def test_security_key():
metadata = {
"status": "READY",
"challengeId": 2,
"challengeType": "SECURITY_KEY",
"securityKey": {
"applicationId": "security_key_application_id",
"challenges": [
{
"keyHandle": "some_key",
"challenge": base64.urlsafe_b64encode(
"some_challenge".encode("ascii")
).decode("ascii"),
}
],
"relyingPartyId": "security_key_application_id",
},
}
mock_key = mock.Mock()
challenge = challenges.SecurityKeyChallenge()
# Test the case that security key challenge is passed with applicationId and
# relyingPartyId the same.
with mock.patch("pyu2f.model.RegisteredKey", return_value=mock_key):
with mock.patch(
"pyu2f.convenience.authenticator.CompositeAuthenticator.Authenticate"
) as mock_authenticate:
mock_authenticate.return_value = "security key response"
assert challenge.name == "SECURITY_KEY"
assert challenge.is_locally_eligible
assert challenge.obtain_challenge_input(metadata) == {
"securityKey": "security key response"
}
mock_authenticate.assert_called_with(
"security_key_application_id",
[{"key": mock_key, "challenge": b"some_challenge"}],
print_callback=sys.stderr.write,
)
# Test the case that security key challenge is passed with applicationId and
# relyingPartyId different, first call works.
metadata["securityKey"]["relyingPartyId"] = "security_key_relying_party_id"
sys.stderr.write("metadata=" + str(metadata) + "\n")
with mock.patch("pyu2f.model.RegisteredKey", return_value=mock_key):
with mock.patch(
"pyu2f.convenience.authenticator.CompositeAuthenticator.Authenticate"
) as mock_authenticate:
mock_authenticate.return_value = "security key response"
assert challenge.name == "SECURITY_KEY"
assert challenge.is_locally_eligible
assert challenge.obtain_challenge_input(metadata) == {
"securityKey": "security key response"
}
mock_authenticate.assert_called_with(
"security_key_relying_party_id",
[{"key": mock_key, "challenge": b"some_challenge"}],
print_callback=sys.stderr.write,
)
# Test the case that security key challenge is passed with applicationId and
# relyingPartyId different, first call fails, requires retry.
metadata["securityKey"]["relyingPartyId"] = "security_key_relying_party_id"
with mock.patch("pyu2f.model.RegisteredKey", return_value=mock_key):
with mock.patch(
"pyu2f.convenience.authenticator.CompositeAuthenticator.Authenticate"
) as mock_authenticate:
assert challenge.name == "SECURITY_KEY"
assert challenge.is_locally_eligible
mock_authenticate.side_effect = [
pyu2f.errors.U2FError(pyu2f.errors.U2FError.DEVICE_INELIGIBLE),
"security key response",
]
assert challenge.obtain_challenge_input(metadata) == {
"securityKey": "security key response"
}
calls = [
mock.call(
"security_key_relying_party_id",
[{"key": mock_key, "challenge": b"some_challenge"}],
print_callback=sys.stderr.write,
),
mock.call(
"security_key_application_id",
[{"key": mock_key, "challenge": b"some_challenge"}],
print_callback=sys.stderr.write,
),
]
mock_authenticate.assert_has_calls(calls)
# Test various types of exceptions.
with mock.patch("pyu2f.model.RegisteredKey", return_value=mock_key):
with mock.patch(
"pyu2f.convenience.authenticator.CompositeAuthenticator.Authenticate"
) as mock_authenticate:
mock_authenticate.side_effect = pyu2f.errors.U2FError(
pyu2f.errors.U2FError.DEVICE_INELIGIBLE
)
assert challenge.obtain_challenge_input(metadata) is None
with mock.patch(
"pyu2f.convenience.authenticator.CompositeAuthenticator.Authenticate"
) as mock_authenticate:
mock_authenticate.side_effect = pyu2f.errors.U2FError(
pyu2f.errors.U2FError.TIMEOUT
)
assert challenge.obtain_challenge_input(metadata) is None
with mock.patch(
"pyu2f.convenience.authenticator.CompositeAuthenticator.Authenticate"
) as mock_authenticate:
mock_authenticate.side_effect = pyu2f.errors.PluginError()
assert challenge.obtain_challenge_input(metadata) is None
with mock.patch(
"pyu2f.convenience.authenticator.CompositeAuthenticator.Authenticate"
) as mock_authenticate:
mock_authenticate.side_effect = pyu2f.errors.U2FError(
pyu2f.errors.U2FError.BAD_REQUEST
)
with pytest.raises(pyu2f.errors.U2FError):
challenge.obtain_challenge_input(metadata)
with mock.patch(
"pyu2f.convenience.authenticator.CompositeAuthenticator.Authenticate"
) as mock_authenticate:
mock_authenticate.side_effect = pyu2f.errors.NoDeviceFoundError()
assert challenge.obtain_challenge_input(metadata) is None
with mock.patch(
"pyu2f.convenience.authenticator.CompositeAuthenticator.Authenticate"
) as mock_authenticate:
mock_authenticate.side_effect = pyu2f.errors.UnsupportedVersionException()
with pytest.raises(pyu2f.errors.UnsupportedVersionException):
challenge.obtain_challenge_input(metadata)
with mock.patch.dict("sys.modules"):
sys.modules["pyu2f"] = None
with pytest.raises(exceptions.ReauthFailError) as excinfo:
challenge.obtain_challenge_input(metadata)
assert excinfo.match(r"pyu2f dependency is required")
@mock.patch("getpass.getpass", return_value="foo")
def test_password_challenge(getpass_mock):
challenge = challenges.PasswordChallenge()
with mock.patch("getpass.getpass", return_value="foo"):
assert challenge.is_locally_eligible
assert challenge.name == "PASSWORD"
assert challenges.PasswordChallenge().obtain_challenge_input({}) == {
"credential": "foo"
}
with mock.patch("getpass.getpass", return_value=None):
assert challenges.PasswordChallenge().obtain_challenge_input({}) == {
"credential": " "
}
def test_saml_challenge():
challenge = challenges.SamlChallenge()
assert challenge.is_locally_eligible
assert challenge.name == "SAML"
with pytest.raises(exceptions.ReauthSamlChallengeFailError):
challenge.obtain_challenge_input(None)
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