public async Task LoadPwDatabase(IStorageFile pwDatabaseFile, IList<IUserKey> userKeys, IProgress<double> percentComplete)
{
StorageFile = pwDatabaseFile;
var factory = new KdbReaderFactory(_encryptionEngine,
_keyTransformer,
_hasher,
_gzipStreamFactory);
var file = await pwDatabaseFile.OpenAsync(FileAccessMode.Read);
Stream kdbDataReader = file.AsStream();
this.PwDatabase = await factory.LoadAsync(kdbDataReader, userKeys, percentComplete);
}
public async Task Write(PwDatabase databaseData, IFile databaseFile)
{
kdb4File = new Kdb4File(databaseData);
ResetHeaderBytes();
MemoryStream memStream = new MemoryStream();
BinaryWriter writer = new BinaryWriter(memStream);
_headerWriter.WriteHeaders(writer, kdb4File);
var header = memStream.ToArray();
var hashOfHeader = _hasher.Hash(header);
var outStream = new MemoryStream();
await outStream.WriteAsync(kdb4File.pbStreamStartBytes, 0, (int)kdb4File.pbStreamStartBytes.Length);
var configuredStream = ConfigureStream(outStream);
var persister = new Kdb4Persister(new CryptoRandomStream(CrsAlgorithm.Salsa20, kdb4File.pbProtectedStreamKey, _hasher));
var data = persister.Persist(databaseData.Tree, hashOfHeader);
try
{
await Task.Run(() =>
configuredStream.Write(data, 0, data.Length));
}
catch(Exception e)
{
}
configuredStream.Dispose();
var compressed = outStream.ToArray();
var keyGenerator = new KeyGenerator(
_hasher,
_keyTransformer,
databaseData.MasterKey,
databaseData.MasterKey.PercentComplete);
var aesKey = await keyGenerator.GenerateHashedKeyAsync(kdb4File.pbMasterSeed, kdb4File.pbTransformSeed, (int)databaseData.KeyEncryptionRounds);
var encrypted = await _databaseEncryptor.Encrypt(compressed, aesKey, kdb4File.pbEncryptionIV);
writer.Write(encrypted);
var streamToWriteToFile = writer.BaseStream;
streamToWriteToFile.Position = 0;
var bytesToWrite = streamToWriteToFile.ToArray();
var databaseStream = await databaseFile.OpenAsync(FileAccess.ReadAndWrite);
databaseStream.SetLength(0);
await databaseStream.FlushAsync();
await databaseStream.WriteAsync(bytesToWrite, 0, bytesToWrite.Length);
await databaseStream.FlushAsync();
databaseStream.Dispose();
var cryptoStream = new CryptoRandomStream(CrsAlgorithm.Salsa20, kdb4File.pbProtectedStreamKey,_hasher);
var parser = new Kdb4Parser(cryptoStream);
databaseData.Tree = parser.ParseAndDecode(databaseData.Tree.Document);
}
public async void Save()
{
CanSave = false;
var databaseXDocument = GenerateDatabase.NewDatabase();
var parser = new Kdb4Parser(null);
var passwordKey = await KcpPassword.Create(Password, new SHA256HasherRT());
var compositeKey = new CompositeKey(new List<IUserKey> { passwordKey }, new NullableProgress<double>());
var pwDatabase = new PwDatabase(compositeKey);
pwDatabase.Tree = parser.ParseXmlDocument(databaseXDocument);
pwDatabase.DataCipherUuid = new PwUuid(new byte[]{
0x31, 0xC1, 0xF2, 0xE6, 0xBF, 0x71, 0x43, 0x50,
0xBE, 0x58, 0x05, 0x21, 0x6A, 0xFC, 0x5A, 0xFF });
if (await _pageServices.EnsureUnsnapped())
{
FileSavePicker saver = new FileSavePicker();
saver.SuggestedStartLocation = PickerLocationId.DocumentsLibrary;
saver.SuggestedFileName = this.Name;
saver.FileTypeChoices.Add(".kdbx", new List<string> { ".kdbx" });
var storageFile = await saver.PickSaveFileAsync();
if (storageFile != null)
{
_dataSource.PwDatabase = pwDatabase;
_dataSource.StorageFile = storageFile;
await _dataSource.SavePwDatabase();
var encodedUUID = _dataSource.PwDatabase.Tree.Group.UUID;
_navigationService.UriFor<EntryGroupListViewModel>().WithParam(vm => vm.GroupId, encodedUUID).Navigate();
}
}
}
private async void NavigateToCreateDemo(object obj)
{
var databaseXDocument = GenerateDatabase.NewDatabase();
var parser = new Kdb4Parser(null);
var passwordKey = await KcpPassword.Create("demo", _hasher);
var compositeKey = new CompositeKey(new List<IUserKey> { passwordKey }, new NullableProgress<double>());
var pwDatabase = new PwDatabase(compositeKey);
pwDatabase.Tree = parser.ParseXmlDocument(databaseXDocument);
pwDatabase.DataCipherUuid = new PwUuid(new byte[]{
0x31, 0xC1, 0xF2, 0xE6, 0xBF, 0x71, 0x43, 0x50,
0xBE, 0x58, 0x05, 0x21, 0x6A, 0xFC, 0x5A, 0xFF });
_databaseSource.PwDatabase = pwDatabase;
await _databaseInfoRepository.SaveDatabaseFromDatasouce("demo.kdbx", "", "", new MemoryStream());
var databaseInfo = await _databaseInfoRepository.GetDatabaseInfo("demo.kdbx");
_databaseSource.StorageFile = await databaseInfo.GetDatabase();
await _databaseSource.SavePwDatabase();
_dialogService.ShowDialogBox("Demo information", "The password to the database is 'demo'");
_navigationService.GoBack();
}