79 lines
2.8 KiB
Dart
79 lines
2.8 KiB
Dart
/*
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* Famedly Matrix SDK
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* Copyright (C) 2019, 2020, 2021 Famedly GmbH
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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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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Affero General Public License for more details.
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*
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* You should have received a copy of the GNU Affero General Public License
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* along with this program. If not, see <https://www.gnu.org/licenses/>.
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*/
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import 'dart:convert';
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import 'package:vodozemac/vodozemac.dart' as vod;
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import 'package:matrix/encryption/utils/pickle_key.dart';
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import 'package:matrix/matrix.dart';
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class OutboundGroupSession {
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/// The devices is a map from user id to device id to if the device is blocked.
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/// This way we can easily know if a new user is added, leaves, a new devices is added, and,
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/// very importantly, if we block a device. These are all important for determining if/when
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/// an outbound session needs to be rotated.
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Map<String, Map<String, bool>> devices = {};
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// Default to a date, that would get this session rotated in any case to make handling easier
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DateTime creationTime = DateTime.fromMillisecondsSinceEpoch(0);
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vod.GroupSession? outboundGroupSession;
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int? get sentMessages => outboundGroupSession?.messageIndex;
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bool get isValid => outboundGroupSession != null;
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final String key;
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OutboundGroupSession({
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required this.devices,
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required this.creationTime,
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required this.outboundGroupSession,
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required this.key,
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});
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OutboundGroupSession.fromJson(Map<String, dynamic> dbEntry, this.key) {
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try {
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for (final entry in json.decode(dbEntry['device_ids']).entries) {
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devices[entry.key] = Map<String, bool>.from(entry.value);
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}
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} catch (e) {
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// devices is bad (old data), so just not use this session
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Logs().i(
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'[OutboundGroupSession] Session in database is old, not using it. $e',
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);
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return;
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}
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creationTime =
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DateTime.fromMillisecondsSinceEpoch(dbEntry['creation_time']);
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try {
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outboundGroupSession = vod.GroupSession.fromPickleEncrypted(
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pickleKey: key.toPickleKey(),
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pickle: dbEntry['pickle'],
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);
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} catch (e, s) {
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try {
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outboundGroupSession = vod.GroupSession.fromOlmPickleEncrypted(
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pickleKey: utf8.encode(key),
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pickle: dbEntry['pickle'],
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);
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} catch (_) {
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Logs().e('[Vodozemac] Unable to unpickle outboundGroupSession', e, s);
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}
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}
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}
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}
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