Line data    Source code

       1              : /*
       2              :  *   Famedly Matrix SDK
       3              :  *   Copyright (C) 2020, 2021 Famedly GmbH
       4              :  *
       5              :  *   This program is free software: you can redistribute it and/or modify
       6              :  *   it under the terms of the GNU Affero General Public License as
       7              :  *   published by the Free Software Foundation, either version 3 of the
       8              :  *   License, or (at your option) any later version.
       9              :  *
      10              :  *   This program is distributed in the hope that it will be useful,
      11              :  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
      12              :  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
      13              :  *   GNU Affero General Public License for more details.
      14              :  *
      15              :  *   You should have received a copy of the GNU Affero General Public License
      16              :  *   along with this program.  If not, see <https://www.gnu.org/licenses/>.
      17              :  */
      18              : 
      19              : import 'dart:convert';
      20              : 
      21              : import 'package:vodozemac/vodozemac.dart' as vod;
      22              : 
      23              : import 'package:matrix/encryption/utils/pickle_key.dart';
      24              : import 'package:matrix/matrix.dart';
      25              : 
      26              : class OlmSession {
      27              :   String identityKey;
      28              :   String? sessionId;
      29              :   vod.Session? session;
      30              :   DateTime? lastReceived;
      31              :   final String key;
      32          135 :   String? get pickledSession => session?.toPickleEncrypted(key.toPickleKey());
      33              : 
      34            8 :   bool get isValid => session != null;
      35              : 
      36           27 :   OlmSession({
      37              :     required this.key,
      38              :     required this.identityKey,
      39              :     required this.sessionId,
      40              :     required this.session,
      41              :     required this.lastReceived,
      42              :   });
      43              : 
      44            5 :   OlmSession.fromJson(Map<String, Object?> dbEntry, this.key)
      45            5 :       : identityKey = dbEntry.tryGet<String>('identity_key') ?? '' {
      46              :     try {
      47              :       try {
      48            9 :         session = vod.Session.fromPickleEncrypted(
      49           10 :           pickleKey: key.toPickleKey(),
      50            5 :           pickle: dbEntry['pickle'] as String,
      51              :         );
      52              :       } catch (_) {
      53            2 :         Logs().d('Unable to unpickle Olm session. Try LibOlm format.');
      54            1 :         session = vod.Session.fromOlmPickleEncrypted(
      55            2 :           pickleKey: utf8.encode(key),
      56            1 :           pickle: dbEntry['pickle'] as String,
      57              :         );
      58              :       }
      59            8 :       sessionId = dbEntry['session_id'] as String;
      60            8 :       lastReceived = DateTime.fromMillisecondsSinceEpoch(
      61            4 :         dbEntry.tryGet<int>('last_received') ?? 0,
      62              :       );
      63           16 :       assert(sessionId == session!.sessionId);
      64              :     } catch (e, s) {
      65            2 :       Logs().e('[Vodozemac] Could not unpickle olm session', e, s);
      66              :     }
      67              :   }
      68              : }