/// <summary>
/// Saves the fortress with all it's changes.
/// </summary>
/// <param name="masterKey"></param>
/// <param name="alsoSaveSecureDC"></param>
public void SaveFortress(Masterkey masterKey)
{
// If successfully saved => Update the fortress hash.
if (_xmlDatacache.SaveFortress(masterKey))
{
SecurityParameterProvider.Instance.UpdateHash(nameof(Fortress), CurrentFortressData.FullPath);
}
}
public Fortress(byte[] salt, byte[] key, string fullPath, string name, string lastName, string userName, string eMail)
{
Salt = salt;
MasterKey = new Masterkey(key);
FullPath = fullPath;
Name = name;
LastName = lastName;
UserName = userName;
EMail = eMail;
Id = Guid.NewGuid();
}
/// <summary>
/// Saves all changes made in memory to disk
/// </summary>
internal bool SaveFortress(Masterkey masterkey)
{
var currentFortress = GetAllFromUnsecure <Fortress>().FirstOrDefault();
currentFortress.FullPath = _databasePath;
currentFortress.MasterKey = masterkey;
currentFortress.Salt = CurrentFortressData.Salt;
WriteFortress(currentFortress, true);
masterkey = null;
return(true);
}
private async void Save_Button_Click(object sender, RoutedEventArgs e)
{
try
{
await Task.Run(() =>
{
Application.Current.Dispatcher.Invoke(() => InformationPanel_Textblock.Text = "Validating your rights...");
// Validate the key first.
if (DataAccessService.Instance.ValidateMasterkey(masterPasswordBox.Password))
{
var aesHelper = new AesHelper();
var hashedKey = aesHelper.CreateKey(masterPasswordBox.Password, 256, CurrentFortressData.Salt);
var secureMasterkey = new Masterkey(hashedKey);
hashedKey = null;
Application.Current.Dispatcher.Invoke(() => InformationPanel_Textblock.Text = "You have the correct keys my friend.");
IOPathHelper.CreateDirectory(IOPathHelper.GetBackedUpFortressDirectory()); // Make sure the directory exists.
// Backup fortress
Application.Current.Dispatcher.Invoke(() => InformationPanel_Textblock.Text = "Backup-ing your fortress...");
DataAccessService.Instance.BackupFortress(
System.IO.Path.Combine(IOPathHelper.GetBackedUpFortressDirectory(), $"(Backup){CurrentFortressData.FortressName}{TermHelper.GetZippedFileEnding()}"));
Application.Current.Dispatcher.Invoke(() => InformationPanel_Textblock.Text = "Fortress backed up. Proceeding to save the fortress...");
// Now save the fortress.
DataAccessService.Instance.SaveFortress(secureMasterkey);
Application.Current.Dispatcher.Invoke(() => InformationPanel_Textblock.Text = "Fortress saved successfully.");
// Backup the fortress again with the newly saved changes.
DataAccessService.Instance.BackupFortress(
System.IO.Path.Combine(IOPathHelper.GetBackedUpFortressDirectory(), $"(Backup){CurrentFortressData.FortressName}{TermHelper.GetZippedFileEnding()}"));
Thread.Sleep(1000); // Make the user see the result for a second.
Application.Current.Dispatcher.Invoke(() => DialogResult = true);
}
else
{
Application.Current.Dispatcher.Invoke(() => InformationPanel_Textblock.Text = "The mission could not be executed.");
return;
}
});
}
catch (Exception ex)
{
Logger.log.Error(ex);
InformationPanel_Textblock.Text = "The mission could not be executed.";
return;
}
finally
{
masterPasswordBox.Password = string.Empty; // Delete the password
}
}
/// <summary>
/// Validates the masterkey by decrypting the given fortress and flushing the memory afterwards.
/// </summary>
/// <param name="fortressFullPath"></param>
/// <param name="fortressName"></param>
/// <param name="password"></param>
internal void ValidateMasterKey(string fortressFullPath, string fortressName, string password)
{
try
{
Logger.log.Info($"Start validating the masterkey of fortress {fortressFullPath}...");
var aesHelper = new AesHelper();
// =========================================================== Unzip the fortress - Read salt
var unzippedFortress = ZipHelper.UnzipSavedZip(fortressFullPath);
using (unzippedFortress)
{
var entryOfSalt = fortressName + "/salt" + TermHelper.GetTextFileEnding();
var saltEntry = unzippedFortress.GetEntry(entryOfSalt);
var saltBytes = new byte[32];
using (var stream = saltEntry.Open())
{
saltBytes = ByteHelper.ReadBytesOfStream(stream);
}
Logger.log.Debug("Unzipped fortress - Salt bytes read.");
// =========================================================== Create masterkey
var hashedKey = aesHelper.CreateKey(password, 256, saltBytes);
password = string.Empty; // Delete the password in plaintext from RAM
var masterKey = new Masterkey(hashedKey);
Logger.log.Debug("Masterkey created.");
// =========================================================== Decrypt database
var entryOfDatabase = fortressName + "/" + TermHelper.GetDatabaseTerm() + TermHelper.GetDatabaseEnding();
var databaseEntry = unzippedFortress.GetEntry(entryOfDatabase);
var aesAlg = new AesAlgorithm();
using (var stream = databaseEntry.Open())
{
var dbBytes = ByteHelper.ReadBytesOfStream(stream);
var decryptedDb = aesAlg.Decrypt(dbBytes, masterKey.Value, saltBytes);
Logger.log.Info($"Validated {TermHelper.GetDatabaseTerm()}");
decryptedDb = null;
}
}
}
catch (Exception ex)
{
ex.SetUserMessage(WellKnownExceptionMessages.DataExceptionMessage());
throw ex;
}
}
private void Button_Click_1(object sender, RoutedEventArgs e)
{
Log.Info("Before: To Enter master key first time installation in MasterPassword ");
// if (_ucount == 0)
// {
if (Masterkey.Password == GetMacAddress() + "STACK" && !string.IsNullOrEmpty(trialtxt.Text))
{
LoginUser _User = new LoginUser();
_User.FirstName = "admin";
_User.Password = "******";
_User.Role = "Admin";
DateTime endDate = DateTime.Now;
_User.Trial = endDate.AddDays(Convert.ToInt32(trialtxt.Text));
Log.Info("Before: To insert first login detail in MasterPassword");
DatabaseAndQueries.Queries.Add <LoginUser>(_User);
// _ucount = 1;
// new Login().Show();
Masterkey.Password = string.Empty;
trialtxt.Text = string.Empty;
// this.isClosingConfirmed = true;
MessageBoxResult messageBoxResult = System.Windows.MessageBox.Show("Your Application is Successfully Install, Click Yes to Restart Application", "Success", System.Windows.MessageBoxButton.YesNo);
Log.Info("Before: To first start of application after MasterPassword");
if (messageBoxResult == MessageBoxResult.Yes)
{
new LoadingWindow().Show();
this.Close();
Log.Info("After: To first start of application after MasterPassword, successfully");
}
else
{
this.Close();
}
Log.Info("After: To insert first login detail in MasterPassword, successfully");
}
else
{
Masterkey.Password = string.Empty;
trialtxt.Text = string.Empty;
MessageBox.Show("Given Information is not Valid......", "");
Masterkey.Focus();
}
// this.Close();
Log.Info("After: To Enter master key first time installation in MasterPassword, Successfully ");
}
/// <summary>
/// Opens a <see cref="Fortress"/> and loads the database.
/// </summary>
public void BuildFortress(string fortressFullPath, string fortressName, string password)
{
try
{
Logger.log.Info($"Start opening the fortress {fortressFullPath}...");
var aesHelper = new AesHelper();
// =========================================================== Unzip the fortress - Read salt
var unzippedFortress = ZipHelper.UnzipSavedZip(fortressFullPath);
using (unzippedFortress)
{
var entryOfSalt = fortressName + "/salt" + TermHelper.GetTextFileEnding();
var saltEntry = unzippedFortress.GetEntry(entryOfSalt);
var saltBytes = new byte[32];
using (var stream = saltEntry.Open())
{
saltBytes = ByteHelper.ReadBytesOfStream(stream);
}
CurrentFortressData.Salt = saltBytes;
Logger.log.Debug("Unzipped fortress - Salt bytes read.");
// =========================================================== Create masterkey
var hashedKey = aesHelper.CreateKey(password, 256, saltBytes);
password = string.Empty; // Delete the password in plaintext from RAM
var masterKey = new Masterkey(hashedKey);
hashedKey = null; // Hash also
Logger.log.Debug("Masterkey created.");
// =========================================================== Decrypt database
var entryOfDatabase = fortressName + "/" + TermHelper.GetDatabaseTerm() + TermHelper.GetDatabaseEnding();
var databaseEntry = unzippedFortress.GetEntry(entryOfDatabase);
var aesAlg = new AesAlgorithm();
using (var stream = databaseEntry.Open())
{
var dbBytes = ByteHelper.ReadBytesOfStream(stream);
var decryptedDb = aesAlg.Decrypt(dbBytes, masterKey.Value, saltBytes);
Logger.log.Info($"Decrypted {TermHelper.GetDatabaseTerm()}");
// =========================================================== Unzip database
// We distinguish between sensible data and normal data. We put the sensible data into the secureDatacache.
var unzippedByteEntriesOfDb = ZipHelper.GetEntriesFromZipArchive(decryptedDb); // These are the entries in byte arrays
decryptedDb = null;
// Add to secureDC.
foreach (var sensibleBytes in unzippedByteEntriesOfDb.Item2.Item2.ToList()) // ToList() otherwise the iterations throws exception
{
AddToSecureMemoryDC(unzippedByteEntriesOfDb.Item2.Item1.Pop(), unzippedByteEntriesOfDb.Item2.Item2.Pop());
}
foreach (var bytes in unzippedByteEntriesOfDb.Item1.ToList()) // Add not sensible data to the "unsecure" DC.
{
AddToUnsecureMemoryDC(BuildModelsOutOfBytes <ModelBase>(unzippedByteEntriesOfDb.Item1.Pop()));
}
unzippedByteEntriesOfDb = null;
}
// Track the security parameters for scans later.
SecurityParameterProvider.Instance.UpdateHash(nameof(Fortress), fortressFullPath);
}
}
catch (Exception ex)
{
ex.SetUserMessage(WellKnownExceptionMessages.DataExceptionMessage());
throw ex;
}
}
