public void SafeOverwriteFile_OverwriteTestFile_EqualOrBiggerLengthToOriginalFile()
{
//arrange
var file = Core.CreateRandomFilledFile(TestDirectory + "file");
//action
FileCryptographer.SafeOverwriteFile(file);
//assert
Assert.GreaterOrEqual(file.Length, file.Length);
}
/// <summary>
/// Common event handler for pressing the Password Insert button
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void insertButton_Click(object sender, EventArgs e)
{
//// hash password
//using (var hasher = new SHA256CryptoServiceProvider())
//{
// _fileCryptographer.HashedKey = hasher.ComputeHash(Encoding.Unicode.GetBytes(passwordBox.Text));
//
//}
// lock interface
mainTableLayoutPanel.Enabled = false;
// hide button, show progress bar
submitButton.Visible = false;
progressBar.Visible = true;
// start decryption/encryption
var ts = TaskScheduler.FromCurrentSynchronizationContext();
var key = passwordBox.Text;
passwordBox.Text = null;
if (FileCryptographer.IsEncrypted(TargetFileInfo))
{
Task.Factory.StartNew(
() =>
FileCryptographer.Decrypt(TargetFileInfo, key))
.ContinueWith(task =>
{
if (task.Exception != null)
{
task.Exception.Handle(Error);
}
key = null;
Close();
}, ts);
}
else
{
Task.Factory.StartNew(
() =>
FileCryptographer.Encrypt(TargetFileInfo, key, deleteFileCheckBox.Checked))
.ContinueWith(task =>
{
if (task.Exception != null)
{
task.Exception.Handle(Error);
}
key = null;
Close();
}, ts);
}
}
public void SafeOverwriteFile_OverwriteTestFile_OverwritesAsEmptyFile()
{
//arrange
var file = Core.CreateRandomFilledFile(TestDirectory + "file");
//action
FileCryptographer.SafeOverwriteFile(file);
//assert
using (var fs = file.OpenRead())
{
while (fs.Position < fs.Length)
{
Assert.AreEqual(fs.ReadByte(), 0);
}
}
}
private void SwapEncryptDecryptFeatures()
{
submitButton.Enabled = true;
optionsGroupBox.Enabled = true;
filePathLabel.Text = _targetFileLocation;
if (FileCryptographer.IsEncrypted(TargetFileInfo))
{
// options
deleteFileCheckBox.Enabled = false;
// submit button text
submitButton.Text = Resources.MainProcess_MainProcess_Decrypt;
}
else
{
deleteFileCheckBox.Enabled = true;
submitButton.Text = Resources.MainProcess_MainProcess_Encrypt;
}
}
