94 lines
2.9 KiB
Python
94 lines
2.9 KiB
Python
# Copyright 2014-2016 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 typing import Dict, Iterable, List, Tuple
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from unpaddedbase64 import encode_base64
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from synapse.storage._base import SQLBaseStore
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from synapse.storage.types import Cursor
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from synapse.util.caches.descriptors import cached, cachedList
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class SignatureWorkerStore(SQLBaseStore):
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@cached()
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def get_event_reference_hash(self, event_id):
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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: Iterable[str]
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) -> Dict[str, Dict[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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"""
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def f(txn):
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return {
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event_id: self._get_event_reference_hashes_txn(txn, event_id)
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for event_id in event_ids
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}
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return await self.db_pool.runInteraction("get_event_reference_hashes", f)
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async def add_event_hashes(
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self, event_ids: Iterable[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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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(hashes.items())
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def _get_event_reference_hashes_txn(
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self, txn: Cursor, event_id: str
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) -> Dict[str, bytes]:
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"""Get all the hashes for a given PDU.
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Args:
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txn:
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event_id: Id for the Event.
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Returns:
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A mapping of algorithm -> hash.
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"""
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query = (
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"SELECT algorithm, hash"
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" FROM event_reference_hashes"
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" WHERE event_id = ?"
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)
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txn.execute(query, (event_id,))
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return {k: v for k, v in txn}
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class SignatureStore(SignatureWorkerStore):
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"""Persistence for event signatures and hashes"""
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