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# Copyright 2015, 2016 OpenMarket Ltd
#
# 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.
from unittest.mock import Mock
import pymacaroons
from synapse.api.errors import AuthError, ResourceLimitError
from synapse.rest import admin
from tests import unittest
from tests.test_utils import make_awaitable
class AuthTestCase(unittest.HomeserverTestCase):
servlets = [
admin.register_servlets,
]
def prepare(self, reactor, clock, hs):
self.auth_handler = hs.get_auth_handler()
self.macaroon_generator = hs.get_macaroon_generator()
# MAU tests
# AuthBlocking reads from the hs' config on initialization. We need to
# modify its config instead of the hs'
self.auth_blocking = hs.get_auth()._auth_blocking
self.auth_blocking._max_mau_value = 50
self.small_number_of_users = 1
self.large_number_of_users = 100
self.user1 = self.register_user("a_user", "pass")
def test_macaroon_caveats(self):
token = self.macaroon_generator.generate_guest_access_token("a_user")
macaroon = pymacaroons.Macaroon.deserialize(token)
def verify_gen(caveat):
return caveat == "gen = 1"
def verify_user(caveat):
return caveat == "user_id = a_user"
def verify_type(caveat):
return caveat == "type = access"
def verify_nonce(caveat):
return caveat.startswith("nonce =")
def verify_guest(caveat):
return caveat == "guest = true"
v = pymacaroons.Verifier()
v.satisfy_general(verify_gen)
v.satisfy_general(verify_user)
v.satisfy_general(verify_type)
v.satisfy_general(verify_nonce)
v.satisfy_general(verify_guest)
v.verify(macaroon, self.hs.config.key.macaroon_secret_key)
def test_short_term_login_token_gives_user_id(self):
token = self.macaroon_generator.generate_short_term_login_token(
self.user1, "", 5000
)
res = self.get_success(self.auth_handler.validate_short_term_login_token(token))
self.assertEqual(self.user1, res.user_id)
self.assertEqual("", res.auth_provider_id)
# when we advance the clock, the token should be rejected
self.reactor.advance(6)
self.get_failure(
self.auth_handler.validate_short_term_login_token(token),
AuthError,
)
def test_short_term_login_token_gives_auth_provider(self):
token = self.macaroon_generator.generate_short_term_login_token(
self.user1, auth_provider_id="my_idp"
)
res = self.get_success(self.auth_handler.validate_short_term_login_token(token))
self.assertEqual(self.user1, res.user_id)
self.assertEqual("my_idp", res.auth_provider_id)
def test_short_term_login_token_cannot_replace_user_id(self):
token = self.macaroon_generator.generate_short_term_login_token(
self.user1, "", 5000
)
macaroon = pymacaroons.Macaroon.deserialize(token)
res = self.get_success(
self.auth_handler.validate_short_term_login_token(macaroon.serialize())
)
self.assertEqual(self.user1, res.user_id)
# add another "user_id" caveat, which might allow us to override the
# user_id.
macaroon.add_first_party_caveat("user_id = b_user")
self.get_failure(
self.auth_handler.validate_short_term_login_token(macaroon.serialize()),
AuthError,
)
def test_mau_limits_disabled(self):
self.auth_blocking._limit_usage_by_mau = False
# Ensure does not throw exception
self.get_success(
self.auth_handler.create_access_token_for_user_id(
self.user1, device_id=None, valid_until_ms=None
)
)
self.get_success(
self.auth_handler.validate_short_term_login_token(
self._get_macaroon().serialize()
)
)
def test_mau_limits_exceeded_large(self):
self.auth_blocking._limit_usage_by_mau = True
self.hs.get_datastore().get_monthly_active_count = Mock(
return_value=make_awaitable(self.large_number_of_users)
)
self.get_failure(
self.auth_handler.create_access_token_for_user_id(
self.user1, device_id=None, valid_until_ms=None
),
ResourceLimitError,
)
self.hs.get_datastore().get_monthly_active_count = Mock(
return_value=make_awaitable(self.large_number_of_users)
)
self.get_failure(
self.auth_handler.validate_short_term_login_token(
self._get_macaroon().serialize()
),
ResourceLimitError,
)
def test_mau_limits_parity(self):
# Ensure we're not at the unix epoch.
self.reactor.advance(1)
self.auth_blocking._limit_usage_by_mau = True
# Set the server to be at the edge of too many users.
self.hs.get_datastore().get_monthly_active_count = Mock(
return_value=make_awaitable(self.auth_blocking._max_mau_value)
)
# If not in monthly active cohort
self.get_failure(
self.auth_handler.create_access_token_for_user_id(
self.user1, device_id=None, valid_until_ms=None
),
ResourceLimitError,
)
self.get_failure(
self.auth_handler.validate_short_term_login_token(
self._get_macaroon().serialize()
),
ResourceLimitError,
)
# If in monthly active cohort
self.hs.get_datastore().user_last_seen_monthly_active = Mock(
return_value=make_awaitable(self.clock.time_msec())
)
self.get_success(
self.auth_handler.create_access_token_for_user_id(
self.user1, device_id=None, valid_until_ms=None
)
)
self.get_success(
self.auth_handler.validate_short_term_login_token(
self._get_macaroon().serialize()
)
)
def test_mau_limits_not_exceeded(self):
self.auth_blocking._limit_usage_by_mau = True
self.hs.get_datastore().get_monthly_active_count = Mock(
return_value=make_awaitable(self.small_number_of_users)
)
# Ensure does not raise exception
self.get_success(
self.auth_handler.create_access_token_for_user_id(
self.user1, device_id=None, valid_until_ms=None
)
)
self.hs.get_datastore().get_monthly_active_count = Mock(
return_value=make_awaitable(self.small_number_of_users)
)
self.get_success(
self.auth_handler.validate_short_term_login_token(
self._get_macaroon().serialize()
)
)
def _get_macaroon(self):
token = self.macaroon_generator.generate_short_term_login_token(
self.user1, "", 5000
)
return pymacaroons.Macaroon.deserialize(token)
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