/// <summary>
/// Handles login.
/// </summary>
private void btnLogin_Click(object sender, RoutedEventArgs e)
{
try
{
if (loginCount >= 3)
{
lblLoginMessage.Content = "Logins exceeded, exit!";
Application.Current.Shutdown();
}
loginCount++;
if (tbPassword.Password.Length > 0)
{
ProgramData.ReadPwHash();
byte[] storedHash = ProgramData.GetPwHash();
byte[] salt = ProgramData.GetPwSalt();
var password = new SecureString();
foreach (char ch in tbPassword.Password.ToCharArray())
{
password.AppendChar(ch);
}
// Securestring to string marshaling (example from: http://www.csharpdeveloping.net/Snippet/how_to_convert_securestring_to_string)
var rfc2898 = new Rfc2898DeriveBytes(Marshal.PtrToStringBSTR(Marshal.SecureStringToBSTR(password)), salt, 10000);
byte[] pwHash = rfc2898.GetBytes(16);
byte[] hashBytes = new byte[32];
Array.Copy(salt, 0, hashBytes, 0, 16);
Array.Copy(pwHash, 0, hashBytes, 16, 16);
if (ProgramData.ComparePwd(hashBytes))
{
lblLoginMessage.Content = "Access OK";
this.Close();
}
else
{
lblLoginMessage.Content = "Please enter a valid password!";
}
}
else
{
lblLoginMessage.Content = "Please enter a valid password!";
}
}
catch (Exception ex)
{
MessageBox.Show("Error: " + ex.Message + "\n\n" + ex.StackTrace);
}
}
/// <summary>
/// Stores the password data to a file.
/// </summary>
public void StorePwData()
{
try
{
List <string> passdata = new List <string>();
foreach (CredentialInfo item in CredentialList)
{
string siteName = item.Site;
// Remove unwanted characters from the names
if (siteName.Contains("ä"))
{
siteName = siteName.Replace('ä', 'a');
}
if (siteName.Contains("ö"))
{
siteName = siteName.Replace('ö', 'o');
}
if (siteName.Contains("å"))
{
siteName = siteName.Replace('å', 'a');
}
passdata.Add(siteName + "\t" + item.Username + "\t" + item.Password + "\n");
}
List <byte[]> passBytes = new List <byte[]>();
foreach (string text in passdata)
{
byte[] byteArr;
UTF8Encoding enc = new UTF8Encoding();
byteArr = enc.GetBytes(text);
passBytes.Add(byteArr);
}
// Get salt+key
byte[] salt = ProgramData.GetPwSalt();
byte[] key = ProgramData.GetPwHash();
string cryptedFile = @".\passdata.dat";
// Write and encrypt file.
FileStream fsCryptedfile = new FileStream(cryptedFile, FileMode.Create);
RijndaelManaged RMCrypto = new RijndaelManaged();
CryptoStream cryptoStream = new CryptoStream(fsCryptedfile, RMCrypto.CreateEncryptor(key, salt), CryptoStreamMode.Write);
foreach (byte[] data in passBytes)
{
for (int i = 0; i < data.Length; i++)
{
cryptoStream.WriteByte(data[i]);
}
}
cryptoStream.Close();
fsCryptedfile.Close();
}
catch (Exception e)
{
MessageBox.Show("Error:\n" + e.Message, "Error");
}
}
private void bgWorkerLoadPwData_DoWork(object sender, DoWorkEventArgs e)
{
try
{
int progressPct = 1;
this.Dispatcher.BeginInvoke((Action) delegate { spProgressIndicator.Visibility = Visibility.Visible; });
((BackgroundWorker)sender).ReportProgress(progressPct);
// Get salt+key
byte[] salt = ProgramData.GetPwSalt();
byte[] key = ProgramData.GetPwHash();
FileStream fsDecrypt = new FileStream(@".\passdata.dat", FileMode.Open);
RijndaelManaged RMDeCrypt = new RijndaelManaged();
CryptoStream deCryptStream = new CryptoStream(fsDecrypt, RMDeCrypt.CreateDecryptor(key, salt), CryptoStreamMode.Read);
int character;
List <string> pwList = new List <string>();
StringBuilder sbLine = new StringBuilder();
// Read from decrypt stream
while ((character = deCryptStream.ReadByte()) != -1)
{
Console.Write(char.ConvertFromUtf32(character));
if (char.ConvertFromUtf32(character).Equals("\n"))
{
pwList.Add(sbLine.ToString());
sbLine.Clear();
((BackgroundWorker)sender).ReportProgress((progressPct < 100) ? progressPct++ : progressPct);
}
else
{
sbLine.Append(char.ConvertFromUtf32(character));
}
}
deCryptStream.Close();
// Update Credential list
this.Dispatcher.BeginInvoke((Action) delegate { CredentialList.Clear(); });
foreach (string entry in pwList)
{
string[] content = entry.Split(new char[] { '\t' });
this.Dispatcher.BeginInvoke((Action) delegate
{
CredentialList.Add(new CredentialInfo {
Site = content[0], Username = content[1], Password = content[2]
});
});
((BackgroundWorker)sender).ReportProgress((progressPct < 100) ? progressPct++ : progressPct);
}
}
catch (Exception ex)
{
MessageBox.Show("Error:\n" + ex.Message, "Error");
}
finally
{
this.Dispatcher.BeginInvoke((Action) delegate { spProgressIndicator.Visibility = Visibility.Collapsed; });
}
}
