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# -*- coding: utf-8 -*-
# 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 mock import Mock
import pymacaroons
from twisted.internet import defer
import synapse
import synapse.api.errors
from synapse.api.errors import ResourceLimitError
from synapse.handlers.auth import AuthHandler
from tests import unittest
from tests.test_utils import make_awaitable
from tests.utils import setup_test_homeserver
class AuthHandlers:
def __init__(self, hs):
self.auth_handler = AuthHandler(hs)
class AuthTestCase(unittest.TestCase):
@defer.inlineCallbacks
def setUp(self):
self.hs = yield setup_test_homeserver(self.addCleanup, handlers=None)
self.hs.handlers = AuthHandlers(self.hs)
self.auth_handler = self.hs.handlers.auth_handler
self.macaroon_generator = self.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 = self.hs.get_auth()._auth_blocking
self.auth_blocking._max_mau_value = 50
self.small_number_of_users = 1
self.large_number_of_users = 100
def test_token_is_a_macaroon(self):
token = self.macaroon_generator.generate_access_token("some_user")
# Check that we can parse the thing with pymacaroons
macaroon = pymacaroons.Macaroon.deserialize(token)
# The most basic of sanity checks
if "some_user" not in macaroon.inspect():
self.fail("some_user was not in %s" % macaroon.inspect())
def test_macaroon_caveats(self):
self.hs.clock.now = 5000
token = self.macaroon_generator.generate_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 =")
v = pymacaroons.Verifier()
v.satisfy_general(verify_gen)
v.satisfy_general(verify_user)
v.satisfy_general(verify_type)
v.satisfy_general(verify_nonce)
v.verify(macaroon, self.hs.config.macaroon_secret_key)
@defer.inlineCallbacks
def test_short_term_login_token_gives_user_id(self):
self.hs.clock.now = 1000
token = self.macaroon_generator.generate_short_term_login_token("a_user", 5000)
user_id = yield defer.ensureDeferred(
self.auth_handler.validate_short_term_login_token_and_get_user_id(token)
)
self.assertEqual("a_user", user_id)
# when we advance the clock, the token should be rejected
self.hs.clock.now = 6000
with self.assertRaises(synapse.api.errors.AuthError):
yield defer.ensureDeferred(
self.auth_handler.validate_short_term_login_token_and_get_user_id(token)
)
@defer.inlineCallbacks
def test_short_term_login_token_cannot_replace_user_id(self):
token = self.macaroon_generator.generate_short_term_login_token("a_user", 5000)
macaroon = pymacaroons.Macaroon.deserialize(token)
user_id = yield defer.ensureDeferred(
self.auth_handler.validate_short_term_login_token_and_get_user_id(
macaroon.serialize()
)
)
self.assertEqual("a_user", 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")
with self.assertRaises(synapse.api.errors.AuthError):
yield defer.ensureDeferred(
self.auth_handler.validate_short_term_login_token_and_get_user_id(
macaroon.serialize()
)
)
@defer.inlineCallbacks
def test_mau_limits_disabled(self):
self.auth_blocking._limit_usage_by_mau = False
# Ensure does not throw exception
yield defer.ensureDeferred(
self.auth_handler.get_access_token_for_user_id(
"user_a", device_id=None, valid_until_ms=None
)
)
yield defer.ensureDeferred(
self.auth_handler.validate_short_term_login_token_and_get_user_id(
self._get_macaroon().serialize()
)
)
@defer.inlineCallbacks
def test_mau_limits_exceeded_large(self):
self.auth_blocking._limit_usage_by_mau = True
self.hs.get_datastore().get_monthly_active_count = Mock(
side_effect=lambda: make_awaitable(self.large_number_of_users)
)
with self.assertRaises(ResourceLimitError):
yield defer.ensureDeferred(
self.auth_handler.get_access_token_for_user_id(
"user_a", device_id=None, valid_until_ms=None
)
)
self.hs.get_datastore().get_monthly_active_count = Mock(
side_effect=lambda: make_awaitable(self.large_number_of_users)
)
with self.assertRaises(ResourceLimitError):
yield defer.ensureDeferred(
self.auth_handler.validate_short_term_login_token_and_get_user_id(
self._get_macaroon().serialize()
)
)
@defer.inlineCallbacks
def test_mau_limits_parity(self):
self.auth_blocking._limit_usage_by_mau = True
# If not in monthly active cohort
self.hs.get_datastore().get_monthly_active_count = Mock(
side_effect=lambda: make_awaitable(self.auth_blocking._max_mau_value)
)
with self.assertRaises(ResourceLimitError):
yield defer.ensureDeferred(
self.auth_handler.get_access_token_for_user_id(
"user_a", device_id=None, valid_until_ms=None
)
)
self.hs.get_datastore().get_monthly_active_count = Mock(
side_effect=lambda: make_awaitable(self.auth_blocking._max_mau_value)
)
with self.assertRaises(ResourceLimitError):
yield defer.ensureDeferred(
self.auth_handler.validate_short_term_login_token_and_get_user_id(
self._get_macaroon().serialize()
)
)
# If in monthly active cohort
self.hs.get_datastore().user_last_seen_monthly_active = Mock(
side_effect=lambda user_id: make_awaitable(self.hs.get_clock().time_msec())
)
self.hs.get_datastore().get_monthly_active_count = Mock(
side_effect=lambda: make_awaitable(self.auth_blocking._max_mau_value)
)
yield defer.ensureDeferred(
self.auth_handler.get_access_token_for_user_id(
"user_a", device_id=None, valid_until_ms=None
)
)
self.hs.get_datastore().user_last_seen_monthly_active = Mock(
side_effect=lambda user_id: make_awaitable(self.hs.get_clock().time_msec())
)
self.hs.get_datastore().get_monthly_active_count = Mock(
side_effect=lambda: make_awaitable(self.auth_blocking._max_mau_value)
)
yield defer.ensureDeferred(
self.auth_handler.validate_short_term_login_token_and_get_user_id(
self._get_macaroon().serialize()
)
)
@defer.inlineCallbacks
def test_mau_limits_not_exceeded(self):
self.auth_blocking._limit_usage_by_mau = True
self.hs.get_datastore().get_monthly_active_count = Mock(
side_effect=lambda: make_awaitable(self.small_number_of_users)
)
# Ensure does not raise exception
yield defer.ensureDeferred(
self.auth_handler.get_access_token_for_user_id(
"user_a", device_id=None, valid_until_ms=None
)
)
self.hs.get_datastore().get_monthly_active_count = Mock(
side_effect=lambda: make_awaitable(self.small_number_of_users)
)
yield defer.ensureDeferred(
self.auth_handler.validate_short_term_login_token_and_get_user_id(
self._get_macaroon().serialize()
)
)
def _get_macaroon(self):
token = self.macaroon_generator.generate_short_term_login_token("user_a", 5000)
return pymacaroons.Macaroon.deserialize(token)
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