/// <summary>
/// Writes the current accounts into the datafile
/// </summary>
public async void WriteLocalDatafile()
{
var dbHash = await App.Repository.Password.GetAsync();
var datafileDB = await App.Repository.Datafile.GetAsync();
var iv = new AesManaged().IV;
await CollectionAccessSemaphore.WaitAsync();
DatafileModel file = new DatafileModel()
{
IV = iv, Collection = Collection
};
var folder = await StorageFolder.GetFolderFromPathAsync(datafileDB.Path);
await FileService.WriteStringAsync(
datafileDB.Name,
NewtonsoftJSONService.SerializeEncrypt(SecretService.Helper.ReadSecret(Constants.ContainerName, dbHash.Hash),
iv,
file),
folder);
CollectionAccessSemaphore.Release();
}
/// <summary>
/// Checks and reads the current local datafile
/// </summary>
/// <param name="dbDatafile"></param>
private async void CheckLocalDatafile(DBDatafileModel dbDatafile)
{
try
{
ObservableCollection <TwoFACodeModel> deserializeCollection = new ObservableCollection <TwoFACodeModel>();
StorageFolder folder = await StorageFolder.GetFolderFromPathAsync(dbDatafile.Path);
if (await FileService.FileExistsAsync(dbDatafile.Name, folder))
{
var dbHash = await App.Repository.Password.GetAsync();
// prevent write of the datafile
_initialization = true;
try
{
string datafileStr = await FileService.ReadStringAsync(dbDatafile.Name, folder);
if (!string.IsNullOrEmpty(datafileStr))
{
// read the iv for AES
DatafileModel datafile = NewtonsoftJSONService.Deserialize <DatafileModel>(datafileStr);
var iv = datafile.IV;
datafile = NewtonsoftJSONService.DeserializeDecrypt <DatafileModel>(
SecretService.Helper.ReadSecret(Constants.ContainerName, dbHash.Hash),
iv,
datafileStr);
deserializeCollection = datafile.Collection;
}
}
catch (Exception)
{
ShowPasswordError();
}
}
// file not found case
else
{
ShowFileOrFolderNotFoundError();
}
if (deserializeCollection != null)
{
Collection.AddRange(deserializeCollection);
if (Collection.Count == 0)
{
// if no error has occured
if (!_errorOccurred)
{
EmptyAccountCollectionTipIsOpen = true;
}
}
else
{
if (EmptyAccountCollectionTipIsOpen)
{
EmptyAccountCollectionTipIsOpen = false;
}
}
}
}
#pragma warning disable CA1031 // Do not catch general exception types
catch (Exception exc)
#pragma warning restore CA1031 // Do not catch general exception types
{
if (exc is UnauthorizedAccessException)
{
ShowUnauthorizedAccessError();
}
else if (exc is FileNotFoundException)
{
ShowFileOrFolderNotFoundError();
}
else
{
_errorOccurred = true;
TrackingManager.TrackException(exc);
ErrorDialogs.ShowUnexpectedError(exc);
}
}
// writing the data file is activated again
_initialization = false;
}