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Stop Auth methods from polling the config on every req. (#7420)

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Andrew Morgan 2020-05-06 15:54:58 +01:00 committed by GitHub
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7 changed files with 168 additions and 106 deletions
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1
changelog.d/7420.misc Normal file
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@ -0,0 +1 @@
Prevent methods in `synapse.handlers.auth` from polling the homeserver config every request.

83
synapse/api/auth.py
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@ -26,16 +26,15 @@ from twisted.internet import defer
import synapse.logging.opentracing as opentracing
import synapse.types
from synapse import event_auth
from synapse.api.constants import EventTypes, LimitBlockingTypes, Membership, UserTypes
from synapse.api.auth_blocking import AuthBlocking
from synapse.api.constants import EventTypes, Membership
from synapse.api.errors import (
AuthError,
Codes,
InvalidClientTokenError,
MissingClientTokenError,
ResourceLimitError,
)
from synapse.api.room_versions import KNOWN_ROOM_VERSIONS
from synapse.config.server import is_threepid_reserved
from synapse.events import EventBase
from synapse.types import StateMap, UserID
from synapse.util.caches import CACHE_SIZE_FACTOR, register_cache
@ -77,7 +76,11 @@ class Auth(object):
self.token_cache = LruCache(CACHE_SIZE_FACTOR * 10000)
register_cache("cache", "token_cache", self.token_cache)
self._auth_blocking = AuthBlocking(self.hs)
self._account_validity = hs.config.account_validity
self._track_appservice_user_ips = hs.config.track_appservice_user_ips
self._macaroon_secret_key = hs.config.macaroon_secret_key
@defer.inlineCallbacks
def check_from_context(self, room_version: str, event, context, do_sig_check=True):
@ -191,7 +194,7 @@ class Auth(object):
opentracing.set_tag("authenticated_entity", user_id)
opentracing.set_tag("appservice_id", app_service.id)
if ip_addr and self.hs.config.track_appservice_user_ips:
if ip_addr and self._track_appservice_user_ips:
yield self.store.insert_client_ip(
user_id=user_id,
access_token=access_token,
@ -454,7 +457,7 @@ class Auth(object):
# access_tokens include a nonce for uniqueness: any value is acceptable
v.satisfy_general(lambda c: c.startswith("nonce = "))
v.verify(macaroon, self.hs.config.macaroon_secret_key)
v.verify(macaroon, self._macaroon_secret_key)
def _verify_expiry(self, caveat):
prefix = "time < "
@ -663,71 +666,5 @@ class Auth(object):
% (user_id, room_id),
)
@defer.inlineCallbacks
def check_auth_blocking(self, user_id=None, threepid=None, user_type=None):
"""Checks if the user should be rejected for some external reason,
such as monthly active user limiting or global disable flag
Args:
user_id(str|None): If present, checks for presence against existing
MAU cohort
threepid(dict|None): If present, checks for presence against configured
reserved threepid. Used in cases where the user is trying register
with a MAU blocked server, normally they would be rejected but their
threepid is on the reserved list. user_id and
threepid should never be set at the same time.
user_type(str|None): If present, is used to decide whether to check against
certain blocking reasons like MAU.
"""
# Never fail an auth check for the server notices users or support user
# This can be a problem where event creation is prohibited due to blocking
if user_id is not None:
if user_id == self.hs.config.server_notices_mxid:
return
if (yield self.store.is_support_user(user_id)):
return
if self.hs.config.hs_disabled:
raise ResourceLimitError(
403,
self.hs.config.hs_disabled_message,
errcode=Codes.RESOURCE_LIMIT_EXCEEDED,
admin_contact=self.hs.config.admin_contact,
limit_type=LimitBlockingTypes.HS_DISABLED,
)
if self.hs.config.limit_usage_by_mau is True:
assert not (user_id and threepid)
# If the user is already part of the MAU cohort or a trial user
if user_id:
timestamp = yield self.store.user_last_seen_monthly_active(user_id)
if timestamp:
return
is_trial = yield self.store.is_trial_user(user_id)
if is_trial:
return
elif threepid:
# If the user does not exist yet, but is signing up with a
# reserved threepid then pass auth check
if is_threepid_reserved(
self.hs.config.mau_limits_reserved_threepids, threepid
):
return
elif user_type == UserTypes.SUPPORT:
# If the user does not exist yet and is of type "support",
# allow registration. Support users are excluded from MAU checks.
return
# Else if there is no room in the MAU bucket, bail
current_mau = yield self.store.get_monthly_active_count()
if current_mau >= self.hs.config.max_mau_value:
raise ResourceLimitError(
403,
"Monthly Active User Limit Exceeded",
admin_contact=self.hs.config.admin_contact,
errcode=Codes.RESOURCE_LIMIT_EXCEEDED,
limit_type=LimitBlockingTypes.MONTHLY_ACTIVE_USER,
)
def check_auth_blocking(self, *args, **kwargs):
return self._auth_blocking.check_auth_blocking(*args, **kwargs)

104
synapse/api/auth_blocking.py Normal file
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@ -0,0 +1,104 @@
# -*- coding: utf-8 -*-
# Copyright 2020 The Matrix.org Foundation C.I.C.
#
# 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 logging
from twisted.internet import defer
from synapse.api.constants import LimitBlockingTypes, UserTypes
from synapse.api.errors import Codes, ResourceLimitError
from synapse.config.server import is_threepid_reserved
logger = logging.getLogger(__name__)
class AuthBlocking(object):
def __init__(self, hs):
self.store = hs.get_datastore()
self._server_notices_mxid = hs.config.server_notices_mxid
self._hs_disabled = hs.config.hs_disabled
self._hs_disabled_message = hs.config.hs_disabled_message
self._admin_contact = hs.config.admin_contact
self._max_mau_value = hs.config.max_mau_value
self._limit_usage_by_mau = hs.config.limit_usage_by_mau
self._mau_limits_reserved_threepids = hs.config.mau_limits_reserved_threepids
@defer.inlineCallbacks
def check_auth_blocking(self, user_id=None, threepid=None, user_type=None):
"""Checks if the user should be rejected for some external reason,
such as monthly active user limiting or global disable flag
Args:
user_id(str|None): If present, checks for presence against existing
MAU cohort
threepid(dict|None): If present, checks for presence against configured
reserved threepid. Used in cases where the user is trying register
with a MAU blocked server, normally they would be rejected but their
threepid is on the reserved list. user_id and
threepid should never be set at the same time.
user_type(str|None): If present, is used to decide whether to check against
certain blocking reasons like MAU.
"""
# Never fail an auth check for the server notices users or support user
# This can be a problem where event creation is prohibited due to blocking
if user_id is not None:
if user_id == self._server_notices_mxid:
return
if (yield self.store.is_support_user(user_id)):
return
if self._hs_disabled:
raise ResourceLimitError(
403,
self._hs_disabled_message,
errcode=Codes.RESOURCE_LIMIT_EXCEEDED,
admin_contact=self._admin_contact,
limit_type=LimitBlockingTypes.HS_DISABLED,
)
if self._limit_usage_by_mau is True:
assert not (user_id and threepid)
# If the user is already part of the MAU cohort or a trial user
if user_id:
timestamp = yield self.store.user_last_seen_monthly_active(user_id)
if timestamp:
return
is_trial = yield self.store.is_trial_user(user_id)
if is_trial:
return
elif threepid:
# If the user does not exist yet, but is signing up with a
# reserved threepid then pass auth check
if is_threepid_reserved(self._mau_limits_reserved_threepids, threepid):
return
elif user_type == UserTypes.SUPPORT:
# If the user does not exist yet and is of type "support",
# allow registration. Support users are excluded from MAU checks.
return
# Else if there is no room in the MAU bucket, bail
current_mau = yield self.store.get_monthly_active_count()
if current_mau >= self._max_mau_value:
raise ResourceLimitError(
403,
"Monthly Active User Limit Exceeded",
admin_contact=self._admin_contact,
errcode=Codes.RESOURCE_LIMIT_EXCEEDED,
limit_type=LimitBlockingTypes.MONTHLY_ACTIVE_USER,
)

36
tests/api/test_auth.py
View file

@ -52,6 +52,10 @@ class AuthTestCase(unittest.TestCase):
self.hs.handlers = TestHandlers(self.hs)
self.auth = Auth(self.hs)
# AuthBlocking reads from the hs' config on initialization. We need to
# modify its config instead of the hs'
self.auth_blocking = self.auth._auth_blocking
self.test_user = "@foo:bar"
self.test_token = b"_test_token_"
@ -321,15 +325,15 @@ class AuthTestCase(unittest.TestCase):
@defer.inlineCallbacks
def test_blocking_mau(self):
self.hs.config.limit_usage_by_mau = False
self.hs.config.max_mau_value = 50
self.auth_blocking._limit_usage_by_mau = False
self.auth_blocking._max_mau_value = 50
lots_of_users = 100
small_number_of_users = 1
# Ensure no error thrown
yield defer.ensureDeferred(self.auth.check_auth_blocking())
self.hs.config.limit_usage_by_mau = True
self.auth_blocking._limit_usage_by_mau = True
self.store.get_monthly_active_count = Mock(
return_value=defer.succeed(lots_of_users)
@ -349,8 +353,8 @@ class AuthTestCase(unittest.TestCase):
@defer.inlineCallbacks
def test_blocking_mau__depending_on_user_type(self):
self.hs.config.max_mau_value = 50
self.hs.config.limit_usage_by_mau = True
self.auth_blocking._max_mau_value = 50
self.auth_blocking._limit_usage_by_mau = True
self.store.get_monthly_active_count = Mock(return_value=defer.succeed(100))
# Support users allowed
@ -370,12 +374,12 @@ class AuthTestCase(unittest.TestCase):
@defer.inlineCallbacks
def test_reserved_threepid(self):
self.hs.config.limit_usage_by_mau = True
self.hs.config.max_mau_value = 1
self.auth_blocking._limit_usage_by_mau = True
self.auth_blocking._max_mau_value = 1
self.store.get_monthly_active_count = lambda: defer.succeed(2)
threepid = {"medium": "email", "address": "reserved@server.com"}
unknown_threepid = {"medium": "email", "address": "unreserved@server.com"}
self.hs.config.mau_limits_reserved_threepids = [threepid]
self.auth_blocking._mau_limits_reserved_threepids = [threepid]
with self.assertRaises(ResourceLimitError):
yield defer.ensureDeferred(self.auth.check_auth_blocking())
@ -389,8 +393,8 @@ class AuthTestCase(unittest.TestCase):
@defer.inlineCallbacks
def test_hs_disabled(self):
self.hs.config.hs_disabled = True
self.hs.config.hs_disabled_message = "Reason for being disabled"
self.auth_blocking._hs_disabled = True
self.auth_blocking._hs_disabled_message = "Reason for being disabled"
with self.assertRaises(ResourceLimitError) as e:
yield defer.ensureDeferred(self.auth.check_auth_blocking())
self.assertEquals(e.exception.admin_contact, self.hs.config.admin_contact)
@ -404,10 +408,10 @@ class AuthTestCase(unittest.TestCase):
"""
# this should be the default, but we had a bug where the test was doing the wrong
# thing, so let's make it explicit
self.hs.config.server_notices_mxid = None
self.auth_blocking._server_notices_mxid = None
self.hs.config.hs_disabled = True
self.hs.config.hs_disabled_message = "Reason for being disabled"
self.auth_blocking._hs_disabled = True
self.auth_blocking._hs_disabled_message = "Reason for being disabled"
with self.assertRaises(ResourceLimitError) as e:
yield defer.ensureDeferred(self.auth.check_auth_blocking())
self.assertEquals(e.exception.admin_contact, self.hs.config.admin_contact)
@ -416,8 +420,8 @@ class AuthTestCase(unittest.TestCase):
@defer.inlineCallbacks
def test_server_notices_mxid_special_cased(self):
self.hs.config.hs_disabled = True
self.auth_blocking._hs_disabled = True
user = "@user:server"
self.hs.config.server_notices_mxid = user
self.hs.config.hs_disabled_message = "Reason for being disabled"
self.auth_blocking._server_notices_mxid = user
self.auth_blocking._hs_disabled_message = "Reason for being disabled"
yield defer.ensureDeferred(self.auth.check_auth_blocking(user))

23
tests/handlers/test_auth.py
View file

@ -39,8 +39,13 @@ class AuthTestCase(unittest.TestCase):
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
# 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
@ -119,7 +124,7 @@ class AuthTestCase(unittest.TestCase):
@defer.inlineCallbacks
def test_mau_limits_disabled(self):
self.hs.config.limit_usage_by_mau = False
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(
@ -135,7 +140,7 @@ class AuthTestCase(unittest.TestCase):
@defer.inlineCallbacks
def test_mau_limits_exceeded_large(self):
self.hs.config.limit_usage_by_mau = True
self.auth_blocking._limit_usage_by_mau = True
self.hs.get_datastore().get_monthly_active_count = Mock(
return_value=defer.succeed(self.large_number_of_users)
)
@ -159,11 +164,11 @@ class AuthTestCase(unittest.TestCase):
@defer.inlineCallbacks
def test_mau_limits_parity(self):
self.hs.config.limit_usage_by_mau = True
self.auth_blocking._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)
return_value=defer.succeed(self.auth_blocking._max_mau_value)
)
with self.assertRaises(ResourceLimitError):
yield defer.ensureDeferred(
@ -173,7 +178,7 @@ class AuthTestCase(unittest.TestCase):
)
self.hs.get_datastore().get_monthly_active_count = Mock(
return_value=defer.succeed(self.hs.config.max_mau_value)
return_value=defer.succeed(self.auth_blocking._max_mau_value)
)
with self.assertRaises(ResourceLimitError):
yield defer.ensureDeferred(
@ -186,7 +191,7 @@ class AuthTestCase(unittest.TestCase):
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)
return_value=defer.succeed(self.auth_blocking._max_mau_value)
)
yield defer.ensureDeferred(
self.auth_handler.get_access_token_for_user_id(
@ -197,7 +202,7 @@ class AuthTestCase(unittest.TestCase):
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)
return_value=defer.succeed(self.auth_blocking._max_mau_value)
)
yield defer.ensureDeferred(
self.auth_handler.validate_short_term_login_token_and_get_user_id(
@ -207,7 +212,7 @@ class AuthTestCase(unittest.TestCase):
@defer.inlineCallbacks
def test_mau_limits_not_exceeded(self):
self.hs.config.limit_usage_by_mau = True
self.auth_blocking._limit_usage_by_mau = True
self.hs.get_datastore().get_monthly_active_count = Mock(
return_value=defer.succeed(self.small_number_of_users)

13
tests/handlers/test_sync.py
View file

@ -30,28 +30,31 @@ class SyncTestCase(tests.unittest.HomeserverTestCase):
self.sync_handler = self.hs.get_sync_handler()
self.store = self.hs.get_datastore()
def test_wait_for_sync_for_user_auth_blocking(self):
# 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
def test_wait_for_sync_for_user_auth_blocking(self):
user_id1 = "@user1:test"
user_id2 = "@user2:test"
sync_config = self._generate_sync_config(user_id1)
self.reactor.advance(100) # So we get not 0 time
self.hs.config.limit_usage_by_mau = True
self.hs.config.max_mau_value = 1
self.auth_blocking._limit_usage_by_mau = True
self.auth_blocking._max_mau_value = 1
# Check that the happy case does not throw errors
self.get_success(self.store.upsert_monthly_active_user(user_id1))
self.get_success(self.sync_handler.wait_for_sync_for_user(sync_config))
# Test that global lock works
self.hs.config.hs_disabled = True
self.auth_blocking._hs_disabled = True
e = self.get_failure(
self.sync_handler.wait_for_sync_for_user(sync_config), ResourceLimitError
)
self.assertEquals(e.value.errcode, Codes.RESOURCE_LIMIT_EXCEEDED)
self.hs.config.hs_disabled = False
self.auth_blocking._hs_disabled = False
sync_config = self._generate_sync_config(user_id2)

14
tests/test_mau.py
View file

@ -19,6 +19,7 @@ import json
from mock import Mock
from synapse.api.auth_blocking import AuthBlocking
from synapse.api.constants import LoginType
from synapse.api.errors import Codes, HttpResponseException, SynapseError
from synapse.rest.client.v2_alpha import register, sync
@ -45,11 +46,17 @@ class TestMauLimit(unittest.HomeserverTestCase):
self.hs.config.limit_usage_by_mau = True
self.hs.config.hs_disabled = False
self.hs.config.max_mau_value = 2
self.hs.config.mau_trial_days = 0
self.hs.config.server_notices_mxid = "@server:red"
self.hs.config.server_notices_mxid_display_name = None
self.hs.config.server_notices_mxid_avatar_url = None
self.hs.config.server_notices_room_name = "Test Server Notice Room"
self.hs.config.mau_trial_days = 0
# AuthBlocking reads config options during hs creation. Recreate the
# hs' copy of AuthBlocking after we've updated config values above
self.auth_blocking = AuthBlocking(self.hs)
self.hs.get_auth()._auth_blocking = self.auth_blocking
return self.hs
def test_simple_deny_mau(self):
@ -121,6 +128,7 @@ class TestMauLimit(unittest.HomeserverTestCase):
self.assertEqual(e.errcode, Codes.RESOURCE_LIMIT_EXCEEDED)
def test_trial_users_cant_come_back(self):
self.auth_blocking._mau_trial_days = 1
self.hs.config.mau_trial_days = 1
# We should be able to register more than the limit initially
@ -169,8 +177,8 @@ class TestMauLimit(unittest.HomeserverTestCase):
self.assertEqual(e.errcode, Codes.RESOURCE_LIMIT_EXCEEDED)
def test_tracked_but_not_limited(self):
self.hs.config.max_mau_value = 1 # should not matter
self.hs.config.limit_usage_by_mau = False
self.auth_blocking._max_mau_value = 1 # should not matter
self.auth_blocking._limit_usage_by_mau = False
self.hs.config.mau_stats_only = True
# Simply being able to create 2 users indicates that the