12345678910111213141516171819202122232425262728293031323334353637383940414243444546474849505152535455565758596061626364656667686970717273747576777879808182838485868788899091929394959697 |
- # -*- coding: utf-8 -*-
- # 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 twisted.internet import defer
- from ._base import SQLBaseStore
- from unpaddedbase64 import encode_base64
- from synapse.crypto.event_signing import compute_event_reference_hash
- from synapse.util.caches.descriptors import cached, cachedList
- class SignatureStore(SQLBaseStore):
- """Persistence for event signatures and hashes"""
- @cached()
- def get_event_reference_hash(self, event_id):
- return self._get_event_reference_hashes_txn(event_id)
- @cachedList(cached_method_name="get_event_reference_hash",
- list_name="event_ids", num_args=1)
- def get_event_reference_hashes(self, event_ids):
- def f(txn):
- return {
- event_id: self._get_event_reference_hashes_txn(txn, event_id)
- for event_id in event_ids
- }
- return self.runInteraction(
- "get_event_reference_hashes",
- f
- )
- @defer.inlineCallbacks
- def add_event_hashes(self, event_ids):
- hashes = yield self.get_event_reference_hashes(
- event_ids
- )
- hashes = {
- e_id: {
- k: encode_base64(v) for k, v in h.items()
- if k == "sha256"
- }
- for e_id, h in hashes.items()
- }
- defer.returnValue(hashes.items())
- def _get_event_reference_hashes_txn(self, txn, event_id):
- """Get all the hashes for a given PDU.
- Args:
- txn (cursor):
- event_id (str): Id for the Event.
- Returns:
- A dict of algorithm -> hash.
- """
- query = (
- "SELECT algorithm, hash"
- " FROM event_reference_hashes"
- " WHERE event_id = ?"
- )
- txn.execute(query, (event_id, ))
- return {k: v for k, v in txn.fetchall()}
- def _store_event_reference_hashes_txn(self, txn, events):
- """Store a hash for a PDU
- Args:
- txn (cursor):
- events (list): list of Events.
- """
- vals = []
- for event in events:
- ref_alg, ref_hash_bytes = compute_event_reference_hash(event)
- vals.append({
- "event_id": event.event_id,
- "algorithm": ref_alg,
- "hash": buffer(ref_hash_bytes),
- })
- self._simple_insert_many_txn(
- txn,
- table="event_reference_hashes",
- values=vals,
- )
|