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
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
|
#
# This file is licensed under the Affero General Public License (AGPL) version 3.
#
# Copyright 2021 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]
#
#
from typing import Any, Collection
from matrix_common.regex import glob_to_regex
from synapse.types import JsonDict
from ._base import Config, ConfigError
class RoomDirectoryConfig(Config):
section = "roomdirectory"
def read_config(self, config: JsonDict, **kwargs: Any) -> None:
self.enable_room_list_search = config.get("enable_room_list_search", True)
alias_creation_rules = config.get("alias_creation_rules")
if alias_creation_rules is not None:
self._alias_creation_rules = [
_RoomDirectoryRule("alias_creation_rules", rule)
for rule in alias_creation_rules
]
else:
self._alias_creation_rules = [
_RoomDirectoryRule("alias_creation_rules", {"action": "allow"})
]
room_list_publication_rules = config.get("room_list_publication_rules")
if room_list_publication_rules is not None:
self._room_list_publication_rules = [
_RoomDirectoryRule("room_list_publication_rules", rule)
for rule in room_list_publication_rules
]
else:
self._room_list_publication_rules = [
_RoomDirectoryRule("room_list_publication_rules", {"action": "allow"})
]
def is_alias_creation_allowed(self, user_id: str, room_id: str, alias: str) -> bool:
"""Checks if the given user is allowed to create the given alias
Args:
user_id: The user to check.
room_id: The room ID for the alias.
alias: The alias being created.
Returns:
True if user is allowed to create the alias
"""
for rule in self._alias_creation_rules:
if rule.matches(user_id, room_id, [alias]):
return rule.action == "allow"
return False
def is_publishing_room_allowed(
self, user_id: str, room_id: str, aliases: Collection[str]
) -> bool:
"""Checks if the given user is allowed to publish the room
Args:
user_id: The user ID publishing the room.
room_id: The room being published.
aliases: any local aliases associated with the room
Returns:
True if user can publish room
"""
for rule in self._room_list_publication_rules:
if rule.matches(user_id, room_id, aliases):
return rule.action == "allow"
return False
class _RoomDirectoryRule:
"""Helper class to test whether a room directory action is allowed, like
creating an alias or publishing a room.
"""
def __init__(self, option_name: str, rule: JsonDict):
"""
Args:
option_name: Name of the config option this rule belongs to
rule: The rule as specified in the config
"""
action = rule["action"]
user_id = rule.get("user_id", "*")
room_id = rule.get("room_id", "*")
alias = rule.get("alias", "*")
if action in ("allow", "deny"):
self.action = action
else:
raise ConfigError(
"%s rules can only have action of 'allow' or 'deny'" % (option_name,)
)
self._alias_matches_all = alias == "*"
try:
self._user_id_regex = glob_to_regex(user_id)
self._alias_regex = glob_to_regex(alias)
self._room_id_regex = glob_to_regex(room_id)
except Exception as e:
raise ConfigError("Failed to parse glob into regex") from e
def matches(self, user_id: str, room_id: str, aliases: Collection[str]) -> bool:
"""Tests if this rule matches the given user_id, room_id and aliases.
Args:
user_id: The user ID to check.
room_id: The room ID to check.
aliases: The associated aliases to the room. Will be a single element
for testing alias creation, and can be empty for testing room
publishing.
Returns:
True if the rule matches.
"""
# Note: The regexes are anchored at both ends
if not self._user_id_regex.match(user_id):
return False
if not self._room_id_regex.match(room_id):
return False
# We only have alias checks left, so we can short circuit if the alias
# rule matches everything.
if self._alias_matches_all:
return True
# If we are not given any aliases then this rule only matches if the
# alias glob matches all aliases, which we checked above.
if not aliases:
return False
# Otherwise, we just need one alias to match
for alias in aliases:
if self._alias_regex.match(alias):
return True
return False
|
