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Merge pull request #3630 from matrix-org/neilj/mau_sign_in_log_in_limits

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Initial impl of capping MAU
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Neil Johnson 2018-08-01 15:58:45 +00:00 committed by GitHub
commit 085435e13a
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11 changed files with 275 additions and 16 deletions
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1
changelog.d/3630.feature Normal file
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@ -0,0 +1 @@
Add ability to limit number of monthly active users on the server

1
synapse/api/errors.py
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@ -55,6 +55,7 @@ class Codes(object):
SERVER_NOT_TRUSTED = "M_SERVER_NOT_TRUSTED"
CONSENT_NOT_GIVEN = "M_CONSENT_NOT_GIVEN"
CANNOT_LEAVE_SERVER_NOTICE_ROOM = "M_CANNOT_LEAVE_SERVER_NOTICE_ROOM"
MAU_LIMIT_EXCEEDED = "M_MAU_LIMIT_EXCEEDED"
class CodeMessageException(RuntimeError):

19
synapse/app/homeserver.py
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@ -20,6 +20,8 @@ import sys
from six import iteritems
from prometheus_client import Gauge
from twisted.application import service
from twisted.internet import defer, reactor
from twisted.web.resource import EncodingResourceWrapper, NoResource
@ -300,6 +302,11 @@ class SynapseHomeServer(HomeServer):
quit_with_error(e.message)
# Gauges to expose monthly active user control metrics
current_mau_gauge = Gauge("synapse_admin_current_mau", "Current MAU")
max_mau_value_gauge = Gauge("synapse_admin_max_mau_value", "MAU Limit")
def setup(config_options):
"""
Args:
@ -512,6 +519,18 @@ def run(hs):
# table will decrease
clock.looping_call(generate_user_daily_visit_stats, 5 * 60 * 1000)
@defer.inlineCallbacks
def generate_monthly_active_users():
count = 0
if hs.config.limit_usage_by_mau:
count = yield hs.get_datastore().count_monthly_users()
current_mau_gauge.set(float(count))
max_mau_value_gauge.set(float(hs.config.max_mau_value))
generate_monthly_active_users()
if hs.config.limit_usage_by_mau:
clock.looping_call(generate_monthly_active_users, 5 * 60 * 1000)
if hs.config.report_stats:
logger.info("Scheduling stats reporting for 3 hour intervals")
clock.looping_call(start_phone_stats_home, 3 * 60 * 60 * 1000)

8
synapse/config/server.py
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@ -67,6 +67,14 @@ class ServerConfig(Config):
"block_non_admin_invites", False,
)
# Options to control access by tracking MAU
self.limit_usage_by_mau = config.get("limit_usage_by_mau", False)
if self.limit_usage_by_mau:
self.max_mau_value = config.get(
"max_mau_value", 0,
)
else:
self.max_mau_value = 0
# FIXME: federation_domain_whitelist needs sytests
self.federation_domain_whitelist = None
federation_domain_whitelist = config.get(

19
synapse/handlers/auth.py
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@ -520,6 +520,7 @@ class AuthHandler(BaseHandler):
"""
logger.info("Logging in user %s on device %s", user_id, device_id)
access_token = yield self.issue_access_token(user_id, device_id)
yield self._check_mau_limits()
# the device *should* have been registered before we got here; however,
# it's possible we raced against a DELETE operation. The thing we
@ -731,15 +732,18 @@ class AuthHandler(BaseHandler):
device_id)
defer.returnValue(access_token)
@defer.inlineCallbacks
def validate_short_term_login_token_and_get_user_id(self, login_token):
yield self._check_mau_limits()
auth_api = self.hs.get_auth()
user_id = None
try:
macaroon = pymacaroons.Macaroon.deserialize(login_token)
user_id = auth_api.get_user_id_from_macaroon(macaroon)
auth_api.validate_macaroon(macaroon, "login", True, user_id)
return user_id
except Exception:
raise AuthError(403, "Invalid token", errcode=Codes.FORBIDDEN)
defer.returnValue(user_id)
@defer.inlineCallbacks
def delete_access_token(self, access_token):
@ -903,6 +907,19 @@ class AuthHandler(BaseHandler):
else:
return defer.succeed(False)
@defer.inlineCallbacks
def _check_mau_limits(self):
"""
Ensure that if mau blocking is enabled that invalid users cannot
log in.
"""
if self.hs.config.limit_usage_by_mau is True:
current_mau = yield self.store.count_monthly_users()
if current_mau >= self.hs.config.max_mau_value:
raise AuthError(
403, "MAU Limit Exceeded", errcode=Codes.MAU_LIMIT_EXCEEDED
)
@attr.s
class MacaroonGenerator(object):

19
synapse/handlers/register.py
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@ -45,7 +45,7 @@ class RegistrationHandler(BaseHandler):
hs (synapse.server.HomeServer):
"""
super(RegistrationHandler, self).__init__(hs)
self.hs = hs
self.auth = hs.get_auth()
self._auth_handler = hs.get_auth_handler()
self.profile_handler = hs.get_profile_handler()
@ -144,6 +144,7 @@ class RegistrationHandler(BaseHandler):
Raises:
RegistrationError if there was a problem registering.
"""
yield self._check_mau_limits()
password_hash = None
if password:
password_hash = yield self.auth_handler().hash(password)
@ -288,6 +289,7 @@ class RegistrationHandler(BaseHandler):
400,
"User ID can only contain characters a-z, 0-9, or '=_-./'",
)
yield self._check_mau_limits()
user = UserID(localpart, self.hs.hostname)
user_id = user.to_string()
@ -437,7 +439,7 @@ class RegistrationHandler(BaseHandler):
"""
if localpart is None:
raise SynapseError(400, "Request must include user id")
yield self._check_mau_limits()
need_register = True
try:
@ -531,3 +533,16 @@ class RegistrationHandler(BaseHandler):
remote_room_hosts=remote_room_hosts,
action="join",
)
@defer.inlineCallbacks
def _check_mau_limits(self):
"""
Do not accept registrations if monthly active user limits exceeded
and limiting is enabled
"""
if self.hs.config.limit_usage_by_mau is True:
current_mau = yield self.store.count_monthly_users()
if current_mau >= self.hs.config.max_mau_value:
raise RegistrationError(
403, "MAU Limit Exceeded", Codes.MAU_LIMIT_EXCEEDED
)

26
synapse/storage/__init__.py
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@ -94,6 +94,7 @@ class DataStore(RoomMemberStore, RoomStore,
self._clock = hs.get_clock()
self.database_engine = hs.database_engine
self.db_conn = db_conn
self._stream_id_gen = StreamIdGenerator(
db_conn, "events", "stream_ordering",
extra_tables=[("local_invites", "stream_id")]
@ -266,6 +267,31 @@ class DataStore(RoomMemberStore, RoomStore,
return self.runInteraction("count_users", _count_users)
def count_monthly_users(self):
"""Counts the number of users who used this homeserver in the last 30 days
This method should be refactored with count_daily_users - the only
reason not to is waiting on definition of mau
Returns:
Defered[int]
"""
def _count_monthly_users(txn):
thirty_days_ago = int(self._clock.time_msec()) - (1000 * 60 * 60 * 24 * 30)
sql = """
SELECT COALESCE(count(*), 0) FROM (
SELECT user_id FROM user_ips
WHERE last_seen > ?
GROUP BY user_id
) u
"""
txn.execute(sql, (thirty_days_ago,))
count, = txn.fetchone()
return count
return self.runInteraction("count_monthly_users", _count_monthly_users)
def count_r30_users(self):
"""
Counts the number of 30 day retained users, defined as:-

2
synapse/storage/schema/delta/50/make_event_content_nullable.py
View File

@ -88,5 +88,5 @@ def run_upgrade(cur, database_engine, *args, **kwargs):
"UPDATE sqlite_master SET sql=? WHERE tbl_name='events' AND type='table'",
(sql, ),
)
cur.execute("PRAGMA schema_version=%i" % (oldver+1,))
cur.execute("PRAGMA schema_version=%i" % (oldver + 1,))
cur.execute("PRAGMA writable_schema=OFF")

80
tests/handlers/test_auth.py
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@ -12,6 +12,7 @@
# 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
@ -19,6 +20,7 @@ from twisted.internet import defer
import synapse
import synapse.api.errors
from synapse.api.errors import AuthError
from synapse.handlers.auth import AuthHandler
from tests import unittest
@ -37,6 +39,10 @@ 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
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")
@ -71,38 +77,37 @@ class AuthTestCase(unittest.TestCase):
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
)
self.assertEqual(
"a_user",
self.auth_handler.validate_short_term_login_token_and_get_user_id(
token
)
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):
self.auth_handler.validate_short_term_login_token_and_get_user_id(
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):
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()
)
self.assertEqual(
"a_user",
self.auth_handler.validate_short_term_login_token_and_get_user_id(
macaroon.serialize()
)
"a_user", user_id
)
# add another "user_id" caveat, which might allow us to override the
@ -110,6 +115,57 @@ class AuthTestCase(unittest.TestCase):
macaroon.add_first_party_caveat("user_id = b_user")
with self.assertRaises(synapse.api.errors.AuthError):
self.auth_handler.validate_short_term_login_token_and_get_user_id(
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')
yield self.auth_handler.validate_short_term_login_token_and_get_user_id(
self._get_macaroon().serialize()
)
@defer.inlineCallbacks
def test_mau_limits_exceeded(self):
self.hs.config.limit_usage_by_mau = True
self.hs.get_datastore().count_monthly_users = Mock(
return_value=defer.succeed(self.large_number_of_users)
)
with self.assertRaises(AuthError):
yield self.auth_handler.get_access_token_for_user_id('user_a')
self.hs.get_datastore().count_monthly_users = Mock(
return_value=defer.succeed(self.large_number_of_users)
)
with self.assertRaises(AuthError):
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().count_monthly_users = 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')
self.hs.get_datastore().count_monthly_users = Mock(
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):
token = self.macaroon_generator.generate_short_term_login_token(
"user_a", 5000
)
return pymacaroons.Macaroon.deserialize(token)

51
tests/handlers/test_register.py
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@ -17,6 +17,7 @@ from mock import Mock
from twisted.internet import defer
from synapse.api.errors import RegistrationError
from synapse.handlers.register import RegistrationHandler
from synapse.types import UserID, create_requester
@ -77,3 +78,53 @@ class RegistrationTestCase(unittest.TestCase):
requester, local_part, display_name)
self.assertEquals(result_user_id, user_id)
self.assertEquals(result_token, 'secret')
@defer.inlineCallbacks
def test_cannot_register_when_mau_limits_exceeded(self):
local_part = "someone"
display_name = "someone"
requester = create_requester("@as:test")
store = self.hs.get_datastore()
self.hs.config.limit_usage_by_mau = False
self.hs.config.max_mau_value = 50
lots_of_users = 100
small_number_users = 1
store.count_monthly_users = Mock(return_value=defer.succeed(lots_of_users))
# Ensure does not throw exception
yield self.handler.get_or_create_user(requester, 'a', display_name)
self.hs.config.limit_usage_by_mau = True
with self.assertRaises(RegistrationError):
yield self.handler.get_or_create_user(requester, 'b', display_name)
store.count_monthly_users = Mock(return_value=defer.succeed(small_number_users))
self._macaroon_mock_generator("another_secret")
# Ensure does not throw exception
yield self.handler.get_or_create_user("@neil:matrix.org", 'c', "Neil")
self._macaroon_mock_generator("another another secret")
store.count_monthly_users = Mock(return_value=defer.succeed(lots_of_users))
with self.assertRaises(RegistrationError):
yield self.handler.register(localpart=local_part)
self._macaroon_mock_generator("another another secret")
store.count_monthly_users = Mock(return_value=defer.succeed(lots_of_users))
with self.assertRaises(RegistrationError):
yield self.handler.register_saml2(local_part)
def _macaroon_mock_generator(self, secret):
"""
Reset macaroon generator in the case where the test creates multiple users
"""
macaroon_generator = Mock(
generate_access_token=Mock(return_value=secret))
self.hs.get_macaroon_generator = Mock(return_value=macaroon_generator)
self.hs.handlers = RegistrationHandlers(self.hs)
self.handler = self.hs.get_handlers().registration_handler

65
tests/storage/test__init__.py Normal file
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@ -0,0 +1,65 @@
# -*- coding: utf-8 -*-
# Copyright 2018 New Vector 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 twisted.internet import defer
import tests.utils
class InitTestCase(tests.unittest.TestCase):
def __init__(self, *args, **kwargs):
super(InitTestCase, self).__init__(*args, **kwargs)
self.store = None # type: synapse.storage.DataStore
@defer.inlineCallbacks
def setUp(self):
hs = yield tests.utils.setup_test_homeserver()
hs.config.max_mau_value = 50
hs.config.limit_usage_by_mau = True
self.store = hs.get_datastore()
self.clock = hs.get_clock()
@defer.inlineCallbacks
def test_count_monthly_users(self):
count = yield self.store.count_monthly_users()
self.assertEqual(0, count)
yield self._insert_user_ips("@user:server1")
yield self._insert_user_ips("@user:server2")
count = yield self.store.count_monthly_users()
self.assertEqual(2, count)
@defer.inlineCallbacks
def _insert_user_ips(self, user):
"""
Helper function to populate user_ips without using batch insertion infra
args:
user (str): specify username i.e. @user:server.com
"""
yield self.store._simple_upsert(
table="user_ips",
keyvalues={
"user_id": user,
"access_token": "access_token",
"ip": "ip",
"user_agent": "user_agent",
"device_id": "device_id",
},
values={
"last_seen": self.clock.time_msec(),
}
)