105 lines
3.4 KiB
Dart
105 lines
3.4 KiB
Dart
import 'dart:io';
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import 'dart:typed_data';
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import "package:computer/computer.dart";
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import 'package:dio/dio.dart';
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import 'package:logging/logging.dart';
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import 'package:photos/core/configuration.dart';
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import 'package:photos/core/network/network.dart';
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import 'package:photos/models/file/file.dart';
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import 'package:photos/services/collections_service.dart';
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import 'package:photos/utils/crypto_util.dart';
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import "package:photos/utils/data_util.dart";
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final _logger = Logger("file_download_util");
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Future<File?> downloadAndDecrypt(
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EnteFile file, {
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ProgressCallback? progressCallback,
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}) {
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final String logPrefix = 'File-${file.uploadedFileID}:';
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_logger.info('$logPrefix starting download');
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final encryptedFilePath = Configuration.instance.getTempDirectory() +
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file.generatedID.toString() +
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".encrypted";
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final encryptedFile = File(encryptedFilePath);
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final startTime = DateTime.now().millisecondsSinceEpoch;
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return NetworkClient.instance
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.getDio()
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.download(
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file.downloadUrl,
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encryptedFilePath,
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options: Options(
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headers: {"X-Auth-Token": Configuration.instance.getToken()},
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),
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onReceiveProgress: progressCallback,
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)
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.then((response) async {
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if (response.statusCode != 200) {
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_logger.warning('$logPrefix download failed ${response.toString()}');
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return null;
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} else if (!encryptedFile.existsSync()) {
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_logger.warning('$logPrefix incomplete download, file not found');
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return null;
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}
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final int sizeInBytes = ((file.fileSize ?? 0) > 0)
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? file.fileSize!
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: await encryptedFile.length();
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final double speedInKBps = sizeInBytes /
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1024.0 /
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((DateTime.now().millisecondsSinceEpoch - startTime) / 1000);
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_logger.info(
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"$logPrefix download completed: ${formatBytes(sizeInBytes)}, avg speed: ${speedInKBps.toStringAsFixed(2)} KB/s",
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);
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final decryptedFilePath = Configuration.instance.getTempDirectory() +
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file.generatedID.toString() +
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".decrypted";
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try {
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await CryptoUtil.decryptFile(
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encryptedFilePath,
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decryptedFilePath,
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CryptoUtil.base642bin(file.fileDecryptionHeader!),
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getFileKey(file),
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);
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} catch (e, s) {
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_logger.severe("failed to decrypt file", e, s);
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return null;
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}
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_logger.info('$logPrefix decryption completed');
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await encryptedFile.delete();
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return File(decryptedFilePath);
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});
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}
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Uint8List getFileKey(EnteFile file) {
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final encryptedKey = CryptoUtil.base642bin(file.encryptedKey!);
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final nonce = CryptoUtil.base642bin(file.keyDecryptionNonce!);
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final collectionKey =
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CollectionsService.instance.getCollectionKey(file.collectionID!);
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return CryptoUtil.decryptSync(encryptedKey, collectionKey, nonce);
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}
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Future<Uint8List> getFileKeyUsingBgWorker(EnteFile file) async {
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final collectionKey =
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CollectionsService.instance.getCollectionKey(file.collectionID!);
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return await Computer.shared().compute(
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_decryptFileKey,
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param: <String, dynamic>{
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"encryptedKey": file.encryptedKey,
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"keyDecryptionNonce": file.keyDecryptionNonce,
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"collectionKey": collectionKey,
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},
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);
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}
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Uint8List _decryptFileKey(Map<String, dynamic> args) {
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final encryptedKey = CryptoUtil.base642bin(args["encryptedKey"]);
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final nonce = CryptoUtil.base642bin(args["keyDecryptionNonce"]);
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return CryptoUtil.decryptSync(
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encryptedKey,
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args["collectionKey"],
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nonce,
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);
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}
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