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184 lines
5.2 KiB
184 lines
5.2 KiB
import 'dart:convert';
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import 'dart:typed_data';
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import 'package:Capsule/utils/encryption/aes_helper.dart';
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import 'package:Capsule/utils/encryption/crypto_utils.dart';
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import 'package:pointycastle/impl.dart';
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import '/models/conversations.dart';
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import '/utils/storage/database.dart';
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Future<ConversationUser> getConversationUser(Conversation conversation, String userId) async {
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final db = await getDatabaseConnection();
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final List<Map<String, dynamic>> maps = await db.query(
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'conversation_users',
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where: 'conversation_id = ? AND user_id = ?',
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whereArgs: [ conversation.id, userId ],
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);
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if (maps.length != 1) {
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throw ArgumentError('Invalid conversation_id or username');
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}
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return ConversationUser(
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id: maps[0]['id'],
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userId: maps[0]['user_id'],
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conversationId: maps[0]['conversation_id'],
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username: maps[0]['username'],
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associationKey: maps[0]['association_key'],
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publicKey: CryptoUtils.rsaPublicKeyFromPem(maps[0]['asymmetric_public_key']),
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admin: maps[0]['admin'] == 1,
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);
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}
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// A method that retrieves all the dogs from the dogs table.
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Future<List<ConversationUser>> getConversationUsers(Conversation conversation) async {
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final db = await getDatabaseConnection();
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final List<Map<String, dynamic>> maps = await db.query(
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'conversation_users',
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where: 'conversation_id = ?',
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whereArgs: [ conversation.id ],
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orderBy: 'username',
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);
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List<ConversationUser> conversationUsers = List.generate(maps.length, (i) {
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return ConversationUser(
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id: maps[i]['id'],
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userId: maps[i]['user_id'],
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conversationId: maps[i]['conversation_id'],
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username: maps[i]['username'],
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associationKey: maps[i]['association_key'],
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publicKey: CryptoUtils.rsaPublicKeyFromPem(maps[i]['asymmetric_public_key']),
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admin: maps[i]['admin'] == 1,
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);
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});
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int index = 0;
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List<ConversationUser> finalConversationUsers = [];
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for (ConversationUser conversationUser in conversationUsers) {
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if (!conversationUser.admin) {
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finalConversationUsers.add(conversationUser);
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continue;
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}
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finalConversationUsers.insert(index, conversationUser);
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index++;
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}
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return finalConversationUsers;
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}
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Future<List<Map<String, dynamic>>> getEncryptedConversationUsers(Conversation conversation, Uint8List symKey) async {
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final db = await getDatabaseConnection();
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final List<Map<String, dynamic>> maps = await db.query(
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'conversation_users',
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where: 'conversation_id = ?',
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whereArgs: [conversation.id],
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orderBy: 'username',
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);
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List<Map<String, dynamic>> conversationUsers = List.generate(maps.length, (i) {
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return {
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'id': maps[i]['id'],
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'conversation_id': maps[i]['conversation_id'],
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'user_id': AesHelper.aesEncrypt(symKey, Uint8List.fromList(maps[i]['user_id'].codeUnits)),
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'username': AesHelper.aesEncrypt(symKey, Uint8List.fromList(maps[i]['username'].codeUnits)),
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'association_key': AesHelper.aesEncrypt(symKey, Uint8List.fromList(maps[i]['association_key'].codeUnits)),
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'public_key': AesHelper.aesEncrypt(symKey, Uint8List.fromList(maps[i]['asymmetric_public_key'].codeUnits)),
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'admin': AesHelper.aesEncrypt(symKey, Uint8List.fromList((maps[i]['admin'] == 1 ? 'true' : 'false').codeUnits)),
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};
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});
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return conversationUsers;
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}
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class ConversationUser{
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String id;
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String userId;
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String conversationId;
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String username;
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String associationKey;
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RSAPublicKey publicKey;
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bool admin;
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ConversationUser({
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required this.id,
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required this.userId,
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required this.conversationId,
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required this.username,
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required this.associationKey,
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required this.publicKey,
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required this.admin,
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});
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factory ConversationUser.fromJson(Map<String, dynamic> json, Uint8List symmetricKey) {
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String userId = AesHelper.aesDecrypt(
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symmetricKey,
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base64.decode(json['user_id']),
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);
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String username = AesHelper.aesDecrypt(
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symmetricKey,
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base64.decode(json['username']),
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);
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String associationKey = AesHelper.aesDecrypt(
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symmetricKey,
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base64.decode(json['association_key']),
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);
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String admin = AesHelper.aesDecrypt(
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symmetricKey,
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base64.decode(json['admin']),
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);
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String publicKeyString = AesHelper.aesDecrypt(
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symmetricKey,
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base64.decode(json['public_key']),
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);
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RSAPublicKey publicKey = CryptoUtils.rsaPublicKeyFromPem(publicKeyString);
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return ConversationUser(
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id: json['id'],
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conversationId: json['conversation_detail_id'],
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userId: userId,
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username: username,
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associationKey: associationKey,
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publicKey: publicKey,
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admin: admin == 'true',
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);
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}
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Map<String, dynamic> toJson() {
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return {
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'id': id,
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'user_id': userId,
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'username': username,
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'association_key': associationKey,
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'asymmetric_public_key': publicKeyPem(),
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'admin': admin ? 'true' : 'false',
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};
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}
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Map<String, dynamic> toMap() {
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return {
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'id': id,
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'user_id': userId,
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'conversation_id': conversationId,
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'username': username,
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'association_key': associationKey,
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'asymmetric_public_key': publicKeyPem(),
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'admin': admin ? 1 : 0,
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};
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}
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String publicKeyPem() {
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return CryptoUtils.encodeRSAPublicKeyToPem(publicKey);
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}
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}
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