mirror of
https://mau.dev/maunium/synapse.git
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148 lines
4.8 KiB
Python
148 lines
4.8 KiB
Python
# -*- coding: utf-8 -*-
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# Copyright 2014 OpenMarket Ltd
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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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from twisted.internet import defer
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from synapse.api.errors import LimitExceededError
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from synapse.util.async import run_on_reactor
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from synapse.crypto.event_signing import add_hashes_and_signatures
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from synapse.api.events.room import (
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RoomCreateEvent, RoomMemberEvent, RoomPowerLevelsEvent, RoomJoinRulesEvent,
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)
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from synapse.api.constants import Membership, JoinRules
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from syutil.base64util import encode_base64
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import logging
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logger = logging.getLogger(__name__)
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class BaseHandler(object):
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def __init__(self, hs):
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self.store = hs.get_datastore()
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self.event_factory = hs.get_event_factory()
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self.auth = hs.get_auth()
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self.notifier = hs.get_notifier()
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self.room_lock = hs.get_room_lock_manager()
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self.state_handler = hs.get_state_handler()
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self.distributor = hs.get_distributor()
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self.ratelimiter = hs.get_ratelimiter()
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self.clock = hs.get_clock()
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self.hs = hs
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self.signing_key = hs.config.signing_key[0]
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self.server_name = hs.hostname
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def ratelimit(self, user_id):
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time_now = self.clock.time()
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allowed, time_allowed = self.ratelimiter.send_message(
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user_id, time_now,
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msg_rate_hz=self.hs.config.rc_messages_per_second,
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burst_count=self.hs.config.rc_message_burst_count,
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)
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if not allowed:
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raise LimitExceededError(
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retry_after_ms=int(1000*(time_allowed - time_now)),
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)
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@defer.inlineCallbacks
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def _add_auth(self, event):
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if event.type == RoomCreateEvent.TYPE:
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event.auth_events = []
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return
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auth_events = []
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key = (RoomPowerLevelsEvent.TYPE, "", )
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power_level_event = event.old_state_events.get(key)
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if power_level_event:
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auth_events.append(power_level_event.event_id)
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key = (RoomJoinRulesEvent.TYPE, "", )
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join_rule_event = event.old_state_events.get(key)
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key = (RoomMemberEvent.TYPE, event.user_id, )
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member_event = event.old_state_events.get(key)
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if join_rule_event:
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join_rule = join_rule_event.content.get("join_rule")
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is_public = join_rule == JoinRules.PUBLIC if join_rule else False
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if event.type == RoomMemberEvent.TYPE:
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if event.content["membership"] == Membership.JOIN:
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if is_public:
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auth_events.append(join_rule_event.event_id)
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elif member_event:
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auth_events.append(member_event.event_id)
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if member_event:
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if member_event.content["membership"] == Membership.JOIN:
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auth_events.append(member_event.event_id)
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hashes = yield self.store.get_event_reference_hashes(
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auth_events
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)
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hashes = [
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{
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k: encode_base64(v) for k, v in h.items()
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if k == "sha256"
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}
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for h in hashes
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]
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event.auth_events = zip(auth_events, hashes)
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@defer.inlineCallbacks
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def _on_new_room_event(self, event, snapshot, extra_destinations=[],
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extra_users=[], suppress_auth=False):
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yield run_on_reactor()
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snapshot.fill_out_prev_events(event)
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yield self.state_handler.annotate_state_groups(event)
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yield self._add_auth(event)
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logger.debug("Signing event...")
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add_hashes_and_signatures(
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event, self.server_name, self.signing_key
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)
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logger.debug("Signed event.")
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if not suppress_auth:
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logger.debug("Authing...")
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self.auth.check(event, raises=True)
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logger.debug("Authed")
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else:
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logger.debug("Suppressed auth.")
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yield self.store.persist_event(event)
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destinations = set(extra_destinations)
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# Send a PDU to all hosts who have joined the room.
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destinations.update((yield self.store.get_joined_hosts_for_room(
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event.room_id
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)))
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event.destinations = list(destinations)
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self.notifier.on_new_room_event(event, extra_users=extra_users)
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federation_handler = self.hs.get_handlers().federation_handler
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yield federation_handler.handle_new_event(event, snapshot)
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