1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
|
#
# This file is licensed under the Affero General Public License (AGPL) version 3.
#
# Copyright 2020 The Matrix.org Foundation C.I.C.
# Copyright (C) 2023 New Vector, Ltd
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero General Public License as
# published by the Free Software Foundation, either version 3 of the
# License, or (at your option) any later version.
#
# See the GNU Affero General Public License for more details:
# <https://www.gnu.org/licenses/agpl-3.0.html>.
#
# Originally licensed under the Apache License, Version 2.0:
# <http://www.apache.org/licenses/LICENSE-2.0>.
#
# [This file includes modifications made by New Vector Limited]
#
#
import logging
from typing import TYPE_CHECKING, Optional
from synapse.api.constants import LimitBlockingTypes, UserTypes
from synapse.api.errors import Codes, ResourceLimitError
from synapse.types import Requester
if TYPE_CHECKING:
from synapse.server import HomeServer
logger = logging.getLogger(__name__)
class AuthBlocking:
def __init__(self, hs: "HomeServer"):
self.store = hs.get_datastores().main
self._server_notices_mxid = hs.config.servernotices.server_notices_mxid
self._hs_disabled = hs.config.server.hs_disabled
self._hs_disabled_message = hs.config.server.hs_disabled_message
self._admin_contact = hs.config.server.admin_contact
self._max_mau_value = hs.config.server.max_mau_value
self._limit_usage_by_mau = hs.config.server.limit_usage_by_mau
self._is_mine_server_name = hs.is_mine_server_name
self._track_appservice_user_ips = hs.config.appservice.track_appservice_user_ips
async def check_auth_blocking(
self,
user_id: Optional[str] = None,
threepid: Optional[str] = None, # Not used in this method, but kept for compatibility
user_type: Optional[str] = None,
requester: Optional[Requester] = None,
) -> 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: If present, checks for presence against existing
MAU cohort
user_type: If present, is used to decide whether to check against
certain blocking reasons like MAU.
requester: If present, and the authenticated entity is a user, checks for
presence against existing MAU cohort. Passing in both a `user_id` and
`requester` is an error.
"""
if requester and user_id:
raise Exception(
"Passed in both 'user_id' and 'requester' to 'check_auth_blocking'"
)
if requester:
if requester.authenticated_entity.startswith("@"):
user_id = requester.authenticated_entity
elif self._is_mine_server_name(requester.authenticated_entity):
# We never block the server from doing actions on behalf of
# users.
return
if requester.app_service and not self._track_appservice_user_ips:
# If we're authenticated as an appservice then we only block
# auth if `track_appservice_user_ips` is set, as that option
# implicitly means that application services are part of MAU
# limits.
return
# 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 await 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:
# If the user is already part of the MAU cohort or a trial user
if user_id:
timestamp = await self.store.user_last_seen_monthly_active(user_id)
if timestamp:
return
is_trial = await self.store.is_trial_user(user_id)
if is_trial:
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 = await 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,
)
|
