Line data    Source code

       1             : /* MIT License
       2             : * 
       3             : * Copyright (C) 2019, 2020, 2021 Famedly GmbH
       4             : * 
       5             : * Permission is hereby granted, free of charge, to any person obtaining a copy
       6             : * of this software and associated documentation files (the "Software"), to deal
       7             : * in the Software without restriction, including without limitation the rights
       8             : * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
       9             : * copies of the Software, and to permit persons to whom the Software is
      10             : * furnished to do so, subject to the following conditions:
      11             : * 
      12             : * The above copyright notice and this permission notice shall be included in all
      13             : * copies or substantial portions of the Software.
      14             : * 
      15             : * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
      16             : * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
      17             : * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
      18             : * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
      19             : * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
      20             : * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
      21             : * SOFTWARE.
      22             : */
      23             : 
      24             : import 'package:matrix/matrix_api_lite.dart';
      25             : 
      26             : extension RoomEncryptedContentBasicEventExtension on BasicEvent {
      27          24 :   RoomEncryptedContent get parsedRoomEncryptedContent =>
      28          48 :       RoomEncryptedContent.fromJson(content);
      29             : }
      30             : 
      31             : class RoomEncryptedContent {
      32             :   String algorithm;
      33             :   String senderKey;
      34             :   String? deviceId;
      35             :   String? sessionId;
      36             :   String? ciphertextMegolm;
      37             :   Map<String, CiphertextInfo>? ciphertextOlm;
      38             : 
      39          24 :   RoomEncryptedContent.fromJson(Map<String, Object?> json)
      40          24 :       : algorithm = json.tryGet('algorithm', TryGet.required) ?? '',
      41          24 :         senderKey = json.tryGet('sender_key', TryGet.required) ?? '',
      42          24 :         deviceId = json.tryGet('device_id'),
      43          24 :         sessionId = json.tryGet('session_id'),
      44          24 :         ciphertextMegolm = json.tryGet('ciphertext', TryGet.silent),
      45             :         // filter out invalid/incomplete CiphertextInfos
      46             :         ciphertextOlm = json
      47          24 :             .tryGet<Map<String, Object?>>('ciphertext', TryGet.silent)
      48          24 :             ?.catchMap(
      49          48 :               (k, v) => MapEntry(
      50             :                 k,
      51          24 :                 CiphertextInfo.fromJson(v as Map<String, Object?>),
      52             :               ),
      53             :             );
      54             : 
      55           0 :   Map<String, Object?> toJson() {
      56           0 :     final data = <String, Object?>{};
      57           0 :     data['algorithm'] = algorithm;
      58           0 :     data['sender_key'] = senderKey;
      59           0 :     if (deviceId != null) {
      60           0 :       data['device_id'] = deviceId;
      61             :     }
      62           0 :     if (sessionId != null) {
      63           0 :       data['session_id'] = sessionId;
      64             :     }
      65           0 :     if (ciphertextMegolm != null) {
      66           0 :       data['ciphertext'] = ciphertextMegolm;
      67             :     }
      68           0 :     if (ciphertextOlm != null) {
      69           0 :       data['ciphertext'] =
      70           0 :           ciphertextOlm!.map((k, v) => MapEntry(k, v.toJson()));
      71           0 :       if (ciphertextMegolm != null) {
      72           0 :         Logs().wtf(
      73             :           'ciphertextOlm and ciphertextMegolm are both set, which should never happen!',
      74             :         );
      75             :       }
      76             :     }
      77             :     return data;
      78             :   }
      79             : }
      80             : 
      81             : class CiphertextInfo {
      82             :   String body;
      83             :   int type;
      84             : 
      85          24 :   CiphertextInfo.fromJson(Map<String, Object?> json)
      86          24 :       : body = json['body'] as String,
      87          24 :         type = json['type'] as int;
      88             : 
      89           0 :   Map<String, Object?> toJson() {
      90           0 :     final data = <String, Object?>{};
      91           0 :     data['body'] = body;
      92           0 :     data['type'] = type;
      93             :     return data;
      94             :   }
      95             : }