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23740eaa3d
During the migration the automated script to update the copyright headers accidentally got rid of some of the existing copyright lines. Reinstate them.
95 lines
3.0 KiB
Python
95 lines
3.0 KiB
Python
#
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# This file is licensed under the Affero General Public License (AGPL) version 3.
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#
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# Copyright 2014-2016 OpenMarket Ltd
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# Copyright (C) 2023 New Vector, Ltd
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#
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU Affero General Public License as
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# published by the Free Software Foundation, either version 3 of the
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# License, or (at your option) any later version.
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#
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# See the GNU Affero General Public License for more details:
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# <https://www.gnu.org/licenses/agpl-3.0.html>.
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#
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# Originally licensed under the Apache License, Version 2.0:
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# <http://www.apache.org/licenses/LICENSE-2.0>.
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#
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# [This file includes modifications made by New Vector Limited]
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#
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#
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from typing import Collection, Dict, List, Mapping, Tuple
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from unpaddedbase64 import encode_base64
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from synapse.crypto.event_signing import compute_event_reference_hash
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from synapse.storage.databases.main.events_worker import (
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EventRedactBehaviour,
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EventsWorkerStore,
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)
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from synapse.util.caches.descriptors import cached, cachedList
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class SignatureWorkerStore(EventsWorkerStore):
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@cached()
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def get_event_reference_hash(self, event_id: str) -> Mapping[str, bytes]:
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# This is a dummy function to allow get_event_reference_hashes
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# to use its cache
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raise NotImplementedError()
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@cachedList(
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cached_method_name="get_event_reference_hash", list_name="event_ids", num_args=1
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)
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async def get_event_reference_hashes(
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self, event_ids: Collection[str]
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) -> Mapping[str, Mapping[str, bytes]]:
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"""Get all hashes for given events.
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Args:
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event_ids: The event IDs to get hashes for.
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Returns:
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A mapping of event ID to a mapping of algorithm to hash.
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Returns an empty dict for a given event id if that event is unknown.
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"""
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events = await self.get_events(
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event_ids,
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redact_behaviour=EventRedactBehaviour.as_is,
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allow_rejected=True,
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)
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hashes: Dict[str, Dict[str, bytes]] = {}
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for event_id in event_ids:
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event = events.get(event_id)
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if event is None:
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hashes[event_id] = {}
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else:
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ref_alg, ref_hash_bytes = compute_event_reference_hash(event)
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hashes[event_id] = {ref_alg: ref_hash_bytes}
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return hashes
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async def add_event_hashes(
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self, event_ids: Collection[str]
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) -> List[Tuple[str, Dict[str, str]]]:
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"""
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Args:
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event_ids: The event IDs
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Returns:
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A list of tuples of event ID and a mapping of algorithm to base-64 encoded hash.
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"""
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hashes = await self.get_event_reference_hashes(event_ids)
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encoded_hashes = {
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e_id: {k: encode_base64(v) for k, v in h.items() if k == "sha256"}
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for e_id, h in hashes.items()
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}
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return list(encoded_hashes.items())
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class SignatureStore(SignatureWorkerStore):
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"""Persistence for event signatures and hashes"""
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