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534 lines
19 KiB
Python
534 lines
19 KiB
Python
# Copyright 2019 The Matrix.org Foundation C.I.C.
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#
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# Licensed under the Apache License, Version 2.0 (the 'License');
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an 'AS IS' BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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import threading
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from typing import TYPE_CHECKING, Dict, Optional, Tuple
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from unittest.mock import Mock
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from synapse.api.constants import EventTypes, Membership
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from synapse.api.errors import SynapseError
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from synapse.events import EventBase
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from synapse.events.third_party_rules import load_legacy_third_party_event_rules
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from synapse.rest import admin
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from synapse.rest.client import login, room
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from synapse.types import JsonDict, Requester, StateMap
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from synapse.util.frozenutils import unfreeze
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from tests import unittest
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from tests.test_utils import make_awaitable
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if TYPE_CHECKING:
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from synapse.module_api import ModuleApi
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thread_local = threading.local()
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class LegacyThirdPartyRulesTestModule:
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def __init__(self, config: Dict, module_api: "ModuleApi"):
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# keep a record of the "current" rules module, so that the test can patch
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# it if desired.
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thread_local.rules_module = self
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self.module_api = module_api
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async def on_create_room(
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self, requester: Requester, config: dict, is_requester_admin: bool
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):
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return True
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async def check_event_allowed(self, event: EventBase, state: StateMap[EventBase]):
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return True
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@staticmethod
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def parse_config(config):
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return config
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class LegacyDenyNewRooms(LegacyThirdPartyRulesTestModule):
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def __init__(self, config: Dict, module_api: "ModuleApi"):
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super().__init__(config, module_api)
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def on_create_room(
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self, requester: Requester, config: dict, is_requester_admin: bool
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):
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return False
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class LegacyChangeEvents(LegacyThirdPartyRulesTestModule):
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def __init__(self, config: Dict, module_api: "ModuleApi"):
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super().__init__(config, module_api)
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async def check_event_allowed(self, event: EventBase, state: StateMap[EventBase]):
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d = event.get_dict()
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content = unfreeze(event.content)
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content["foo"] = "bar"
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d["content"] = content
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return d
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class ThirdPartyRulesTestCase(unittest.FederatingHomeserverTestCase):
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servlets = [
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admin.register_servlets,
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login.register_servlets,
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room.register_servlets,
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]
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def make_homeserver(self, reactor, clock):
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hs = self.setup_test_homeserver()
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load_legacy_third_party_event_rules(hs)
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# We're not going to be properly signing events as our remote homeserver is fake,
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# therefore disable event signature checks.
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# Note that these checks are not relevant to this test case.
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# Have this homeserver auto-approve all event signature checking.
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async def approve_all_signature_checking(_, pdu):
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return pdu
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hs.get_federation_server()._check_sigs_and_hash = approve_all_signature_checking
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# Have this homeserver skip event auth checks. This is necessary due to
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# event auth checks ensuring that events were signed by the sender's homeserver.
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async def _check_event_auth(origin, event, context, *args, **kwargs):
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return context
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hs.get_federation_event_handler()._check_event_auth = _check_event_auth
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return hs
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def prepare(self, reactor, clock, homeserver):
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# Create some users and a room to play with during the tests
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self.user_id = self.register_user("kermit", "monkey")
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self.invitee = self.register_user("invitee", "hackme")
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self.tok = self.login("kermit", "monkey")
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# Some tests might prevent room creation on purpose.
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try:
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self.room_id = self.helper.create_room_as(self.user_id, tok=self.tok)
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except Exception:
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pass
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def test_third_party_rules(self):
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"""Tests that a forbidden event is forbidden from being sent, but an allowed one
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can be sent.
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"""
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# patch the rules module with a Mock which will return False for some event
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# types
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async def check(ev, state):
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return ev.type != "foo.bar.forbidden", None
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callback = Mock(spec=[], side_effect=check)
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self.hs.get_third_party_event_rules()._check_event_allowed_callbacks = [
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callback
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]
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channel = self.make_request(
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"PUT",
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"/_matrix/client/r0/rooms/%s/send/foo.bar.allowed/1" % self.room_id,
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{},
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access_token=self.tok,
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)
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self.assertEquals(channel.result["code"], b"200", channel.result)
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callback.assert_called_once()
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# there should be various state events in the state arg: do some basic checks
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state_arg = callback.call_args[0][1]
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for k in (("m.room.create", ""), ("m.room.member", self.user_id)):
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self.assertIn(k, state_arg)
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ev = state_arg[k]
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self.assertEqual(ev.type, k[0])
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self.assertEqual(ev.state_key, k[1])
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channel = self.make_request(
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"PUT",
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"/_matrix/client/r0/rooms/%s/send/foo.bar.forbidden/2" % self.room_id,
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{},
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access_token=self.tok,
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)
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self.assertEquals(channel.result["code"], b"403", channel.result)
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def test_third_party_rules_workaround_synapse_errors_pass_through(self):
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"""
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Tests that the workaround introduced by https://github.com/matrix-org/synapse/pull/11042
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is functional: that SynapseErrors are passed through from check_event_allowed
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and bubble up to the web resource.
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NEW MODULES SHOULD NOT MAKE USE OF THIS WORKAROUND!
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This is a temporary workaround!
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"""
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class NastyHackException(SynapseError):
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def error_dict(self):
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"""
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This overrides SynapseError's `error_dict` to nastily inject
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JSON into the error response.
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"""
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result = super().error_dict()
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result["nasty"] = "very"
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return result
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# add a callback that will raise our hacky exception
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async def check(ev, state) -> Tuple[bool, Optional[JsonDict]]:
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raise NastyHackException(429, "message")
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self.hs.get_third_party_event_rules()._check_event_allowed_callbacks = [check]
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# Make a request
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channel = self.make_request(
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"PUT",
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"/_matrix/client/r0/rooms/%s/send/foo.bar.forbidden/2" % self.room_id,
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{},
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access_token=self.tok,
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)
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# Check the error code
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self.assertEquals(channel.result["code"], b"429", channel.result)
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# Check the JSON body has had the `nasty` key injected
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self.assertEqual(
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channel.json_body,
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{"errcode": "M_UNKNOWN", "error": "message", "nasty": "very"},
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)
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def test_cannot_modify_event(self):
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"""cannot accidentally modify an event before it is persisted"""
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# first patch the event checker so that it will try to modify the event
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async def check(ev: EventBase, state):
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ev.content = {"x": "y"}
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return True, None
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self.hs.get_third_party_event_rules()._check_event_allowed_callbacks = [check]
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# now send the event
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channel = self.make_request(
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"PUT",
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"/_matrix/client/r0/rooms/%s/send/modifyme/1" % self.room_id,
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{"x": "x"},
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access_token=self.tok,
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)
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# Because check_event_allowed raises an exception, it leads to a
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# 500 Internal Server Error
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self.assertEqual(channel.code, 500, channel.result)
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def test_modify_event(self):
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"""The module can return a modified version of the event"""
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# first patch the event checker so that it will modify the event
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async def check(ev: EventBase, state):
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d = ev.get_dict()
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d["content"] = {"x": "y"}
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return True, d
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self.hs.get_third_party_event_rules()._check_event_allowed_callbacks = [check]
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# now send the event
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channel = self.make_request(
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"PUT",
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"/_matrix/client/r0/rooms/%s/send/modifyme/1" % self.room_id,
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{"x": "x"},
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access_token=self.tok,
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)
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self.assertEqual(channel.result["code"], b"200", channel.result)
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event_id = channel.json_body["event_id"]
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# ... and check that it got modified
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channel = self.make_request(
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"GET",
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"/_matrix/client/r0/rooms/%s/event/%s" % (self.room_id, event_id),
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access_token=self.tok,
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)
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self.assertEqual(channel.result["code"], b"200", channel.result)
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ev = channel.json_body
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self.assertEqual(ev["content"]["x"], "y")
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def test_message_edit(self):
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"""Ensure that the module doesn't cause issues with edited messages."""
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# first patch the event checker so that it will modify the event
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async def check(ev: EventBase, state):
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d = ev.get_dict()
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d["content"] = {
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"msgtype": "m.text",
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"body": d["content"]["body"].upper(),
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}
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return True, d
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self.hs.get_third_party_event_rules()._check_event_allowed_callbacks = [check]
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# Send an event, then edit it.
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channel = self.make_request(
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"PUT",
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"/_matrix/client/r0/rooms/%s/send/modifyme/1" % self.room_id,
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{
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"msgtype": "m.text",
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"body": "Original body",
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},
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access_token=self.tok,
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)
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self.assertEqual(channel.result["code"], b"200", channel.result)
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orig_event_id = channel.json_body["event_id"]
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channel = self.make_request(
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"PUT",
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"/_matrix/client/r0/rooms/%s/send/m.room.message/2" % self.room_id,
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{
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"m.new_content": {"msgtype": "m.text", "body": "Edited body"},
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"m.relates_to": {
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"rel_type": "m.replace",
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"event_id": orig_event_id,
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},
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"msgtype": "m.text",
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"body": "Edited body",
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},
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access_token=self.tok,
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)
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self.assertEqual(channel.result["code"], b"200", channel.result)
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edited_event_id = channel.json_body["event_id"]
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# ... and check that they both got modified
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channel = self.make_request(
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"GET",
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"/_matrix/client/r0/rooms/%s/event/%s" % (self.room_id, orig_event_id),
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access_token=self.tok,
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)
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self.assertEqual(channel.result["code"], b"200", channel.result)
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ev = channel.json_body
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self.assertEqual(ev["content"]["body"], "ORIGINAL BODY")
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channel = self.make_request(
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"GET",
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"/_matrix/client/r0/rooms/%s/event/%s" % (self.room_id, edited_event_id),
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access_token=self.tok,
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)
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self.assertEqual(channel.result["code"], b"200", channel.result)
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ev = channel.json_body
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self.assertEqual(ev["content"]["body"], "EDITED BODY")
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def test_send_event(self):
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"""Tests that a module can send an event into a room via the module api"""
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content = {
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"msgtype": "m.text",
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"body": "Hello!",
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}
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event_dict = {
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"room_id": self.room_id,
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"type": "m.room.message",
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"content": content,
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"sender": self.user_id,
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}
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event: EventBase = self.get_success(
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self.hs.get_module_api().create_and_send_event_into_room(event_dict)
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)
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self.assertEquals(event.sender, self.user_id)
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self.assertEquals(event.room_id, self.room_id)
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self.assertEquals(event.type, "m.room.message")
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self.assertEquals(event.content, content)
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@unittest.override_config(
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{
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"third_party_event_rules": {
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"module": __name__ + ".LegacyChangeEvents",
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"config": {},
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}
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}
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)
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def test_legacy_check_event_allowed(self):
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"""Tests that the wrapper for legacy check_event_allowed callbacks works
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correctly.
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"""
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channel = self.make_request(
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"PUT",
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"/_matrix/client/r0/rooms/%s/send/m.room.message/1" % self.room_id,
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{
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"msgtype": "m.text",
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"body": "Original body",
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},
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access_token=self.tok,
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)
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self.assertEqual(channel.result["code"], b"200", channel.result)
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event_id = channel.json_body["event_id"]
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channel = self.make_request(
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"GET",
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"/_matrix/client/r0/rooms/%s/event/%s" % (self.room_id, event_id),
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access_token=self.tok,
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)
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self.assertEqual(channel.result["code"], b"200", channel.result)
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self.assertIn("foo", channel.json_body["content"].keys())
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self.assertEqual(channel.json_body["content"]["foo"], "bar")
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@unittest.override_config(
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{
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"third_party_event_rules": {
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"module": __name__ + ".LegacyDenyNewRooms",
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"config": {},
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}
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}
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)
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def test_legacy_on_create_room(self):
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"""Tests that the wrapper for legacy on_create_room callbacks works
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correctly.
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"""
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self.helper.create_room_as(self.user_id, tok=self.tok, expect_code=403)
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def test_sent_event_end_up_in_room_state(self):
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"""Tests that a state event sent by a module while processing another state event
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doesn't get dropped from the state of the room. This is to guard against a bug
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where Synapse has been observed doing so, see https://github.com/matrix-org/synapse/issues/10830
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"""
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event_type = "org.matrix.test_state"
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# This content will be updated later on, and since we actually use a reference on
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# the dict it does the right thing. It's a bit hacky but a handy way of making
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# sure the state actually gets updated.
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event_content = {"i": -1}
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api = self.hs.get_module_api()
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# Define a callback that sends a custom event on power levels update.
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async def test_fn(event: EventBase, state_events):
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if event.is_state and event.type == EventTypes.PowerLevels:
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await api.create_and_send_event_into_room(
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{
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"room_id": event.room_id,
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"sender": event.sender,
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"type": event_type,
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"content": event_content,
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"state_key": "",
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}
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)
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return True, None
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self.hs.get_third_party_event_rules()._check_event_allowed_callbacks = [test_fn]
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# Sometimes the bug might not happen the first time the event type is added
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# to the state but might happen when an event updates the state of the room for
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# that type, so we test updating the state several times.
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for i in range(5):
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# Update the content of the custom state event to be sent by the callback.
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event_content["i"] = i
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# Update the room's power levels with a different value each time so Synapse
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# doesn't consider an update redundant.
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self._update_power_levels(event_default=i)
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# Check that the new event made it to the room's state.
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channel = self.make_request(
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method="GET",
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path="/rooms/" + self.room_id + "/state/" + event_type,
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access_token=self.tok,
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)
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self.assertEqual(channel.code, 200)
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self.assertEqual(channel.json_body["i"], i)
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def test_on_new_event(self):
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"""Test that the on_new_event callback is called on new events"""
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on_new_event = Mock(make_awaitable(None))
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self.hs.get_third_party_event_rules()._on_new_event_callbacks.append(
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on_new_event
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)
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# Send a message event to the room and check that the callback is called.
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self.helper.send(room_id=self.room_id, tok=self.tok)
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self.assertEqual(on_new_event.call_count, 1)
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# Check that the callback is also called on membership updates.
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self.helper.invite(
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room=self.room_id,
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src=self.user_id,
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targ=self.invitee,
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tok=self.tok,
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)
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self.assertEqual(on_new_event.call_count, 2)
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args, _ = on_new_event.call_args
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self.assertEqual(args[0].membership, Membership.INVITE)
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self.assertEqual(args[0].state_key, self.invitee)
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# Check that the invitee's membership is correct in the state that's passed down
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# to the callback.
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self.assertEqual(
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args[1][(EventTypes.Member, self.invitee)].membership,
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Membership.INVITE,
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)
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# Send an event over federation and check that the callback is also called.
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self._send_event_over_federation()
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self.assertEqual(on_new_event.call_count, 3)
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def _send_event_over_federation(self) -> None:
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"""Send a dummy event over federation and check that the request succeeds."""
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body = {
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"origin": self.hs.config.server.server_name,
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"origin_server_ts": self.clock.time_msec(),
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"pdus": [
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{
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"sender": self.user_id,
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"type": EventTypes.Message,
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"state_key": "",
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"content": {"body": "hello world", "msgtype": "m.text"},
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"room_id": self.room_id,
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"depth": 0,
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"origin_server_ts": self.clock.time_msec(),
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"prev_events": [],
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"auth_events": [],
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"signatures": {},
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"unsigned": {},
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}
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],
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}
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channel = self.make_request(
|
|
method="PUT",
|
|
path="/_matrix/federation/v1/send/1",
|
|
content=body,
|
|
federation_auth_origin=self.hs.config.server.server_name.encode("utf8"),
|
|
)
|
|
|
|
self.assertEqual(channel.code, 200, channel.result)
|
|
|
|
def _update_power_levels(self, event_default: int = 0):
|
|
"""Updates the room's power levels.
|
|
|
|
Args:
|
|
event_default: Value to use for 'events_default'.
|
|
"""
|
|
self.helper.send_state(
|
|
room_id=self.room_id,
|
|
event_type=EventTypes.PowerLevels,
|
|
body={
|
|
"ban": 50,
|
|
"events": {
|
|
"m.room.avatar": 50,
|
|
"m.room.canonical_alias": 50,
|
|
"m.room.encryption": 100,
|
|
"m.room.history_visibility": 100,
|
|
"m.room.name": 50,
|
|
"m.room.power_levels": 100,
|
|
"m.room.server_acl": 100,
|
|
"m.room.tombstone": 100,
|
|
},
|
|
"events_default": event_default,
|
|
"invite": 0,
|
|
"kick": 50,
|
|
"redact": 50,
|
|
"state_default": 50,
|
|
"users": {self.user_id: 100},
|
|
"users_default": 0,
|
|
},
|
|
tok=self.tok,
|
|
)
|