private async Task ConfirmAndDeleteFile(YubiCryptFile file)
{
if (await CheckUSBToken())
{
try
{
var msgResult = await this.ShowMessageAsync(string.Empty, string.Format("{0} will be deleted.\nContinue?", file.FileName), MessageDialogStyle.AffirmativeAndNegative);
if (msgResult == MessageDialogResult.Affirmative)
{
await DeleteFile(file.InternalName);
await LoadFiles();
}
}
catch (Exception e)
{
ToggleProgressOverlay(false);
this.ShowMessageAsync("Houston, we've had a problem.", e.Message);
}
}
}
private async Task SelectAndDownloadFile(YubiCryptFile file)
{
if (await CheckUSBToken())
{
var tempFilePath = Path.GetTempFileName();
SaveFileDialog dlg = new SaveFileDialog();
dlg.FileName = file.FileName;
dlg.OverwritePrompt = true;
Nullable <bool> result = dlg.ShowDialog();
if (result == true)
{
try
{
var password = await this.ShowInputAsync("Passphrase needed", "Please enter the passphrase used to protect this file:");
ToggleProgressOverlay(true);
SetProgressMessage(string.Format("Downloading {0} from your YubiCrypt account...", file.FileName));
using (var encryptedFileStream = File.Open(tempFilePath, FileMode.Open, FileAccess.ReadWrite))
{
await DownloadFile(file.InternalName, encryptedFileStream);
SetProgressMessage("Decrypting your file.\nMake sure your YubiKey token is plugged in.");
encryptedFileStream.Seek(0, SeekOrigin.Begin);
using (var plaintextFileStream = File.Open(dlg.FileName + ".tmp", FileMode.Create))
{
DecryptFile(encryptedFileStream, plaintextFileStream, password);
}
if (File.Exists(dlg.FileName))
{
File.Delete(dlg.FileName);
}
File.Move(dlg.FileName + ".tmp", dlg.FileName);
ToggleProgressOverlay(false);
}
File.Delete(tempFilePath);
}
catch (YubiCryptEngineException e)
{
ToggleProgressOverlay(false);
this.ShowMessageAsync("Houston, we've had a problem.", e.Message);
}
catch (Exception e)
{
ToggleProgressOverlay(false);
this.ShowMessageAsync("Houston, we've had a problem.", e.Message);
}
finally
{
if (File.Exists(dlg.FileName + ".tmp"))
{
File.Delete(dlg.FileName + ".tmp");
}
if (File.Exists(tempFilePath))
{
File.Delete(tempFilePath);
}
}
}
}
}
