88 lines
2.9 KiB
Python
88 lines
2.9 KiB
Python
# Copyright 2014-2016 OpenMarket 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 typing import Collection, Dict, List, Mapping, Tuple
|
|
|
|
from unpaddedbase64 import encode_base64
|
|
|
|
from synapse.crypto.event_signing import compute_event_reference_hash
|
|
from synapse.storage.databases.main.events_worker import (
|
|
EventRedactBehaviour,
|
|
EventsWorkerStore,
|
|
)
|
|
from synapse.util.caches.descriptors import cached, cachedList
|
|
|
|
|
|
class SignatureWorkerStore(EventsWorkerStore):
|
|
@cached()
|
|
def get_event_reference_hash(self, event_id: str) -> Mapping[str, bytes]:
|
|
# This is a dummy function to allow get_event_reference_hashes
|
|
# to use its cache
|
|
raise NotImplementedError()
|
|
|
|
@cachedList(
|
|
cached_method_name="get_event_reference_hash", list_name="event_ids", num_args=1
|
|
)
|
|
async def get_event_reference_hashes(
|
|
self, event_ids: Collection[str]
|
|
) -> Mapping[str, Mapping[str, bytes]]:
|
|
"""Get all hashes for given events.
|
|
|
|
Args:
|
|
event_ids: The event IDs to get hashes for.
|
|
|
|
Returns:
|
|
A mapping of event ID to a mapping of algorithm to hash.
|
|
Returns an empty dict for a given event id if that event is unknown.
|
|
"""
|
|
events = await self.get_events(
|
|
event_ids,
|
|
redact_behaviour=EventRedactBehaviour.as_is,
|
|
allow_rejected=True,
|
|
)
|
|
|
|
hashes: Dict[str, Dict[str, bytes]] = {}
|
|
for event_id in event_ids:
|
|
event = events.get(event_id)
|
|
if event is None:
|
|
hashes[event_id] = {}
|
|
else:
|
|
ref_alg, ref_hash_bytes = compute_event_reference_hash(event)
|
|
hashes[event_id] = {ref_alg: ref_hash_bytes}
|
|
|
|
return hashes
|
|
|
|
async def add_event_hashes(
|
|
self, event_ids: Collection[str]
|
|
) -> List[Tuple[str, Dict[str, str]]]:
|
|
"""
|
|
|
|
Args:
|
|
event_ids: The event IDs
|
|
|
|
Returns:
|
|
A list of tuples of event ID and a mapping of algorithm to base-64 encoded hash.
|
|
"""
|
|
hashes = await self.get_event_reference_hashes(event_ids)
|
|
encoded_hashes = {
|
|
e_id: {k: encode_base64(v) for k, v in h.items() if k == "sha256"}
|
|
for e_id, h in hashes.items()
|
|
}
|
|
|
|
return list(encoded_hashes.items())
|
|
|
|
|
|
class SignatureStore(SignatureWorkerStore):
|
|
"""Persistence for event signatures and hashes"""
|