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synapse/tests/handlers/test_auth.py

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# -*- coding: utf-8 -*-
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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 mock import Mock
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import pymacaroons
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from twisted.internet import defer
import synapse
import synapse.api.errors
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from synapse.api.errors import ResourceLimitError
from synapse.handlers.auth import AuthHandler
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from tests import unittest
from tests.utils import setup_test_homeserver
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class AuthHandlers(object):
def __init__(self, hs):
self.auth_handler = AuthHandler(hs)
class AuthTestCase(unittest.TestCase):
@defer.inlineCallbacks
def setUp(self):
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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
self.hs.config.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)
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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
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token = self.macaroon_generator.generate_short_term_login_token("a_user", 5000)
user_id = yield 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 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):
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token = self.macaroon_generator.generate_short_term_login_token("a_user", 5000)
macaroon = pymacaroons.Macaroon.deserialize(token)
user_id = yield self.auth_handler.validate_short_term_login_token_and_get_user_id(
macaroon.serialize()
)
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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 self.auth_handler.validate_short_term_login_token_and_get_user_id(
macaroon.serialize()
)
@defer.inlineCallbacks
def test_mau_limits_disabled(self):
self.hs.config.limit_usage_by_mau = False
# Ensure does not throw exception
yield self.auth_handler.get_access_token_for_user_id(
"user_a", device_id=None, valid_until_ms=None
)
yield self.auth_handler.validate_short_term_login_token_and_get_user_id(
self._get_macaroon().serialize()
)
@defer.inlineCallbacks
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def test_mau_limits_exceeded_large(self):
self.hs.config.limit_usage_by_mau = True
self.hs.get_datastore().get_monthly_active_count = Mock(
return_value=defer.succeed(self.large_number_of_users)
)
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with self.assertRaises(ResourceLimitError):
yield 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(
return_value=defer.succeed(self.large_number_of_users)
)
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with self.assertRaises(ResourceLimitError):
yield self.auth_handler.validate_short_term_login_token_and_get_user_id(
self._get_macaroon().serialize()
)
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@defer.inlineCallbacks
def test_mau_limits_parity(self):
self.hs.config.limit_usage_by_mau = True
# If not in monthly active cohort
self.hs.get_datastore().get_monthly_active_count = Mock(
return_value=defer.succeed(self.hs.config.max_mau_value)
)
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with self.assertRaises(ResourceLimitError):
yield self.auth_handler.get_access_token_for_user_id(
"user_a", device_id=None, valid_until_ms=None
)
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self.hs.get_datastore().get_monthly_active_count = Mock(
return_value=defer.succeed(self.hs.config.max_mau_value)
)
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with self.assertRaises(ResourceLimitError):
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yield 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(
return_value=defer.succeed(self.hs.get_clock().time_msec())
)
self.hs.get_datastore().get_monthly_active_count = Mock(
return_value=defer.succeed(self.hs.config.max_mau_value)
)
yield self.auth_handler.get_access_token_for_user_id(
"user_a", device_id=None, valid_until_ms=None
)
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self.hs.get_datastore().user_last_seen_monthly_active = Mock(
return_value=defer.succeed(self.hs.get_clock().time_msec())
)
self.hs.get_datastore().get_monthly_active_count = Mock(
return_value=defer.succeed(self.hs.config.max_mau_value)
)
yield 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.hs.config.limit_usage_by_mau = True
self.hs.get_datastore().get_monthly_active_count = Mock(
return_value=defer.succeed(self.small_number_of_users)
)
# Ensure does not raise exception
yield self.auth_handler.get_access_token_for_user_id(
"user_a", device_id=None, valid_until_ms=None
)
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self.hs.get_datastore().get_monthly_active_count = Mock(
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return_value=defer.succeed(self.small_number_of_users)
)
yield self.auth_handler.validate_short_term_login_token_and_get_user_id(
self._get_macaroon().serialize()
)
def _get_macaroon(self):
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token = self.macaroon_generator.generate_short_term_login_token("user_a", 5000)
return pymacaroons.Macaroon.deserialize(token)