mirror of
https://mau.dev/maunium/synapse.git
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518 lines
19 KiB
Python
518 lines
19 KiB
Python
# -*- coding: utf-8 -*-
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# Copyright 2015, 2016 OpenMarket Ltd
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# Copyright 2019 New Vector Ltd
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# Copyright 2019 The Matrix.org Foundation C.I.C.
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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 six import iteritems
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from canonicaljson import encode_canonical_json, json
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from twisted.internet import defer
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from synapse.logging.opentracing import log_kv, set_tag, trace
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from synapse.util.caches.descriptors import cached
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from ._base import SQLBaseStore, db_to_json
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class EndToEndKeyWorkerStore(SQLBaseStore):
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@trace
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@defer.inlineCallbacks
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def get_e2e_device_keys(
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self, query_list, include_all_devices=False, include_deleted_devices=False
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):
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"""Fetch a list of device keys.
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Args:
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query_list(list): List of pairs of user_ids and device_ids.
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include_all_devices (bool): whether to include entries for devices
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that don't have device keys
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include_deleted_devices (bool): whether to include null entries for
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devices which no longer exist (but were in the query_list).
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This option only takes effect if include_all_devices is true.
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Returns:
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Dict mapping from user-id to dict mapping from device_id to
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key data. The key data will be a dict in the same format as the
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DeviceKeys type returned by POST /_matrix/client/r0/keys/query.
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"""
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set_tag("query_list", query_list)
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if not query_list:
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return {}
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results = yield self.runInteraction(
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"get_e2e_device_keys",
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self._get_e2e_device_keys_txn,
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query_list,
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include_all_devices,
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include_deleted_devices,
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)
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# Build the result structure, un-jsonify the results, and add the
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# "unsigned" section
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rv = {}
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for user_id, device_keys in iteritems(results):
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rv[user_id] = {}
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for device_id, device_info in iteritems(device_keys):
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r = db_to_json(device_info.pop("key_json"))
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r["unsigned"] = {}
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display_name = device_info["device_display_name"]
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if display_name is not None:
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r["unsigned"]["device_display_name"] = display_name
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if "signatures" in device_info:
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for sig_user_id, sigs in device_info["signatures"].items():
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r.setdefault("signatures", {}).setdefault(
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sig_user_id, {}
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).update(sigs)
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rv[user_id][device_id] = r
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return rv
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@trace
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def _get_e2e_device_keys_txn(
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self, txn, query_list, include_all_devices=False, include_deleted_devices=False
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):
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set_tag("include_all_devices", include_all_devices)
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set_tag("include_deleted_devices", include_deleted_devices)
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query_clauses = []
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query_params = []
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signature_query_clauses = []
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signature_query_params = []
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if include_all_devices is False:
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include_deleted_devices = False
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if include_deleted_devices:
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deleted_devices = set(query_list)
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for (user_id, device_id) in query_list:
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query_clause = "user_id = ?"
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query_params.append(user_id)
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signature_query_clause = "target_user_id = ?"
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signature_query_params.append(user_id)
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if device_id is not None:
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query_clause += " AND device_id = ?"
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query_params.append(device_id)
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signature_query_clause += " AND target_device_id = ?"
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signature_query_params.append(device_id)
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signature_query_clause += " AND user_id = ?"
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signature_query_params.append(user_id)
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query_clauses.append(query_clause)
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signature_query_clauses.append(signature_query_clause)
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sql = (
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"SELECT user_id, device_id, "
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" d.display_name AS device_display_name, "
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" k.key_json"
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" FROM devices d"
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" %s JOIN e2e_device_keys_json k USING (user_id, device_id)"
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" WHERE %s AND NOT d.hidden"
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) % (
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"LEFT" if include_all_devices else "INNER",
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" OR ".join("(" + q + ")" for q in query_clauses),
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)
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txn.execute(sql, query_params)
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rows = self.cursor_to_dict(txn)
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result = {}
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for row in rows:
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if include_deleted_devices:
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deleted_devices.remove((row["user_id"], row["device_id"]))
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result.setdefault(row["user_id"], {})[row["device_id"]] = row
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if include_deleted_devices:
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for user_id, device_id in deleted_devices:
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result.setdefault(user_id, {})[device_id] = None
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# get signatures on the device
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signature_sql = (
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"SELECT * " " FROM e2e_cross_signing_signatures " " WHERE %s"
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) % (" OR ".join("(" + q + ")" for q in signature_query_clauses))
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txn.execute(signature_sql, signature_query_params)
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rows = self.cursor_to_dict(txn)
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for row in rows:
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target_user_id = row["target_user_id"]
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target_device_id = row["target_device_id"]
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if target_user_id in result and target_device_id in result[target_user_id]:
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result[target_user_id][target_device_id].setdefault(
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"signatures", {}
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).setdefault(row["user_id"], {})[row["key_id"]] = row["signature"]
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log_kv(result)
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return result
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@defer.inlineCallbacks
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def get_e2e_one_time_keys(self, user_id, device_id, key_ids):
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"""Retrieve a number of one-time keys for a user
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Args:
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user_id(str): id of user to get keys for
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device_id(str): id of device to get keys for
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key_ids(list[str]): list of key ids (excluding algorithm) to
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retrieve
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Returns:
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deferred resolving to Dict[(str, str), str]: map from (algorithm,
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key_id) to json string for key
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"""
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rows = yield self._simple_select_many_batch(
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table="e2e_one_time_keys_json",
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column="key_id",
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iterable=key_ids,
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retcols=("algorithm", "key_id", "key_json"),
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keyvalues={"user_id": user_id, "device_id": device_id},
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desc="add_e2e_one_time_keys_check",
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)
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result = {(row["algorithm"], row["key_id"]): row["key_json"] for row in rows}
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log_kv({"message": "Fetched one time keys for user", "one_time_keys": result})
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return result
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@defer.inlineCallbacks
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def add_e2e_one_time_keys(self, user_id, device_id, time_now, new_keys):
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"""Insert some new one time keys for a device. Errors if any of the
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keys already exist.
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Args:
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user_id(str): id of user to get keys for
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device_id(str): id of device to get keys for
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time_now(long): insertion time to record (ms since epoch)
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new_keys(iterable[(str, str, str)]: keys to add - each a tuple of
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(algorithm, key_id, key json)
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"""
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def _add_e2e_one_time_keys(txn):
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set_tag("user_id", user_id)
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set_tag("device_id", device_id)
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set_tag("new_keys", new_keys)
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# We are protected from race between lookup and insertion due to
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# a unique constraint. If there is a race of two calls to
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# `add_e2e_one_time_keys` then they'll conflict and we will only
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# insert one set.
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self._simple_insert_many_txn(
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txn,
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table="e2e_one_time_keys_json",
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values=[
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{
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"user_id": user_id,
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"device_id": device_id,
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"algorithm": algorithm,
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"key_id": key_id,
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"ts_added_ms": time_now,
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"key_json": json_bytes,
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}
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for algorithm, key_id, json_bytes in new_keys
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],
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)
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self._invalidate_cache_and_stream(
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txn, self.count_e2e_one_time_keys, (user_id, device_id)
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)
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yield self.runInteraction(
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"add_e2e_one_time_keys_insert", _add_e2e_one_time_keys
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)
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@cached(max_entries=10000)
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def count_e2e_one_time_keys(self, user_id, device_id):
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""" Count the number of one time keys the server has for a device
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Returns:
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Dict mapping from algorithm to number of keys for that algorithm.
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"""
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def _count_e2e_one_time_keys(txn):
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sql = (
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"SELECT algorithm, COUNT(key_id) FROM e2e_one_time_keys_json"
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" WHERE user_id = ? AND device_id = ?"
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" GROUP BY algorithm"
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)
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txn.execute(sql, (user_id, device_id))
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result = {}
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for algorithm, key_count in txn:
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result[algorithm] = key_count
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return result
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return self.runInteraction("count_e2e_one_time_keys", _count_e2e_one_time_keys)
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def _get_e2e_cross_signing_key_txn(self, txn, user_id, key_type, from_user_id=None):
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"""Returns a user's cross-signing key.
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Args:
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txn (twisted.enterprise.adbapi.Connection): db connection
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user_id (str): the user whose key is being requested
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key_type (str): the type of key that is being set: either 'master'
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for a master key, 'self_signing' for a self-signing key, or
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'user_signing' for a user-signing key
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from_user_id (str): if specified, signatures made by this user on
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the key will be included in the result
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Returns:
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dict of the key data or None if not found
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"""
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sql = (
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"SELECT keydata "
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" FROM e2e_cross_signing_keys "
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" WHERE user_id = ? AND keytype = ? ORDER BY stream_id DESC LIMIT 1"
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)
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txn.execute(sql, (user_id, key_type))
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row = txn.fetchone()
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if not row:
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return None
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key = json.loads(row[0])
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device_id = None
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for k in key["keys"].values():
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device_id = k
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if from_user_id is not None:
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sql = (
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"SELECT key_id, signature "
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" FROM e2e_cross_signing_signatures "
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" WHERE user_id = ? "
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" AND target_user_id = ? "
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" AND target_device_id = ? "
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)
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txn.execute(sql, (from_user_id, user_id, device_id))
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row = txn.fetchone()
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if row:
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key.setdefault("signatures", {}).setdefault(from_user_id, {})[
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row[0]
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] = row[1]
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return key
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def get_e2e_cross_signing_key(self, user_id, key_type, from_user_id=None):
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"""Returns a user's cross-signing key.
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Args:
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user_id (str): the user whose self-signing key is being requested
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key_type (str): the type of cross-signing key to get
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from_user_id (str): if specified, signatures made by this user on
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the self-signing key will be included in the result
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Returns:
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dict of the key data or None if not found
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"""
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return self.runInteraction(
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"get_e2e_cross_signing_key",
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self._get_e2e_cross_signing_key_txn,
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user_id,
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key_type,
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from_user_id,
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)
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class EndToEndKeyStore(EndToEndKeyWorkerStore, SQLBaseStore):
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def set_e2e_device_keys(self, user_id, device_id, time_now, device_keys):
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"""Stores device keys for a device. Returns whether there was a change
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or the keys were already in the database.
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"""
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def _set_e2e_device_keys_txn(txn):
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set_tag("user_id", user_id)
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set_tag("device_id", device_id)
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set_tag("time_now", time_now)
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set_tag("device_keys", device_keys)
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old_key_json = self._simple_select_one_onecol_txn(
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txn,
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table="e2e_device_keys_json",
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keyvalues={"user_id": user_id, "device_id": device_id},
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retcol="key_json",
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allow_none=True,
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)
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# In py3 we need old_key_json to match new_key_json type. The DB
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# returns unicode while encode_canonical_json returns bytes.
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new_key_json = encode_canonical_json(device_keys).decode("utf-8")
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if old_key_json == new_key_json:
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log_kv({"Message": "Device key already stored."})
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return False
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self._simple_upsert_txn(
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txn,
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table="e2e_device_keys_json",
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keyvalues={"user_id": user_id, "device_id": device_id},
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values={"ts_added_ms": time_now, "key_json": new_key_json},
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)
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log_kv({"message": "Device keys stored."})
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return True
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return self.runInteraction("set_e2e_device_keys", _set_e2e_device_keys_txn)
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def claim_e2e_one_time_keys(self, query_list):
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"""Take a list of one time keys out of the database"""
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@trace
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def _claim_e2e_one_time_keys(txn):
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sql = (
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"SELECT key_id, key_json FROM e2e_one_time_keys_json"
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" WHERE user_id = ? AND device_id = ? AND algorithm = ?"
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" LIMIT 1"
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)
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result = {}
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delete = []
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for user_id, device_id, algorithm in query_list:
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user_result = result.setdefault(user_id, {})
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device_result = user_result.setdefault(device_id, {})
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txn.execute(sql, (user_id, device_id, algorithm))
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for key_id, key_json in txn:
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device_result[algorithm + ":" + key_id] = key_json
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delete.append((user_id, device_id, algorithm, key_id))
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sql = (
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"DELETE FROM e2e_one_time_keys_json"
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" WHERE user_id = ? AND device_id = ? AND algorithm = ?"
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" AND key_id = ?"
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)
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for user_id, device_id, algorithm, key_id in delete:
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log_kv(
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{
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"message": "Executing claim e2e_one_time_keys transaction on database."
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}
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)
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txn.execute(sql, (user_id, device_id, algorithm, key_id))
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log_kv({"message": "finished executing and invalidating cache"})
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self._invalidate_cache_and_stream(
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txn, self.count_e2e_one_time_keys, (user_id, device_id)
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)
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return result
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return self.runInteraction("claim_e2e_one_time_keys", _claim_e2e_one_time_keys)
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def delete_e2e_keys_by_device(self, user_id, device_id):
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def delete_e2e_keys_by_device_txn(txn):
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log_kv(
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{
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"message": "Deleting keys for device",
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"device_id": device_id,
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"user_id": user_id,
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}
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)
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self._simple_delete_txn(
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txn,
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table="e2e_device_keys_json",
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keyvalues={"user_id": user_id, "device_id": device_id},
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)
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self._simple_delete_txn(
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txn,
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table="e2e_one_time_keys_json",
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keyvalues={"user_id": user_id, "device_id": device_id},
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)
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self._invalidate_cache_and_stream(
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txn, self.count_e2e_one_time_keys, (user_id, device_id)
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)
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return self.runInteraction(
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"delete_e2e_keys_by_device", delete_e2e_keys_by_device_txn
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)
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def _set_e2e_cross_signing_key_txn(self, txn, user_id, key_type, key):
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"""Set a user's cross-signing key.
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Args:
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txn (twisted.enterprise.adbapi.Connection): db connection
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user_id (str): the user to set the signing key for
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key_type (str): the type of key that is being set: either 'master'
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for a master key, 'self_signing' for a self-signing key, or
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'user_signing' for a user-signing key
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key (dict): the key data
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"""
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# the cross-signing keys need to occupy the same namespace as devices,
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# since signatures are identified by device ID. So add an entry to the
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# device table to make sure that we don't have a collision with device
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# IDs
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# the 'key' dict will look something like:
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# {
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# "user_id": "@alice:example.com",
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# "usage": ["self_signing"],
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# "keys": {
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# "ed25519:base64+self+signing+public+key": "base64+self+signing+public+key",
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# },
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# "signatures": {
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# "@alice:example.com": {
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# "ed25519:base64+master+public+key": "base64+signature"
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# }
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# }
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# }
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# The "keys" property must only have one entry, which will be the public
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# key, so we just grab the first value in there
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pubkey = next(iter(key["keys"].values()))
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self._simple_insert_txn(
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txn,
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"devices",
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values={
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"user_id": user_id,
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"device_id": pubkey,
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"display_name": key_type + " signing key",
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"hidden": True,
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},
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)
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# and finally, store the key itself
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with self._cross_signing_id_gen.get_next() as stream_id:
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self._simple_insert_txn(
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txn,
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"e2e_cross_signing_keys",
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values={
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"user_id": user_id,
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"keytype": key_type,
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"keydata": json.dumps(key),
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|
"stream_id": stream_id,
|
|
},
|
|
)
|
|
|
|
def set_e2e_cross_signing_key(self, user_id, key_type, key):
|
|
"""Set a user's cross-signing key.
|
|
|
|
Args:
|
|
user_id (str): the user to set the user-signing key for
|
|
key_type (str): the type of cross-signing key to set
|
|
key (dict): the key data
|
|
"""
|
|
return self.runInteraction(
|
|
"add_e2e_cross_signing_key",
|
|
self._set_e2e_cross_signing_key_txn,
|
|
user_id,
|
|
key_type,
|
|
key,
|
|
)
|
|
|
|
def store_e2e_cross_signing_signatures(self, user_id, signatures):
|
|
"""Stores cross-signing signatures.
|
|
|
|
Args:
|
|
user_id (str): the user who made the signatures
|
|
signatures (iterable[SignatureListItem]): signatures to add
|
|
"""
|
|
return self._simple_insert_many(
|
|
"e2e_cross_signing_signatures",
|
|
[
|
|
{
|
|
"user_id": user_id,
|
|
"key_id": item.signing_key_id,
|
|
"target_user_id": item.target_user_id,
|
|
"target_device_id": item.target_device_id,
|
|
"signature": item.signature,
|
|
}
|
|
for item in signatures
|
|
],
|
|
"add_e2e_signing_key",
|
|
)
|