/// <summary>
/// Retreives the master key from isolated storage. If a key does not exist, it will create a new one.
/// </summary>
/// <returns></returns>
public static byte[] GetMasterKey()
{
byte[] MasterKey = new byte[0];
using (IsolatedStorageFile store = IsolatedStorageFile.GetUserStoreForAssembly())
{
if (store.FileExists(KeyFileName))
{
// Load the file
using (IsolatedStorageFileStream file = store.OpenFile(KeyFileName, FileMode.Open))
{
MasterKey = new byte[file.Length];
file.Read(MasterKey, 0, Convert.ToInt32(file.Length));
}
}
else
{
// Generate new master key, and save it to a file
// The method we generate this does not have to match other platforms, it just has to be random
MasterKey = MSPWDCrypto.CreateMasterKey(MSPWDCrypto.CreateRandomString());
SetMasterKeyFile(MasterKey);
}
}
return(MasterKey);
}
private void GenerateButton_Click(object sender, RoutedEventArgs e)
{
if (MSPWDStorage.MasterKeyFileExists())
{
txtOutput_Alpha.Text = MSPWDCrypto.CreatePassword_Alpha(txtInput.Text);
txtOutput_Special.Text = MSPWDCrypto.CreatePassword_Special(txtInput.Text);
enableClipboardButtons(true);
}
else
{
MessageBox.Show("Master key not present - set the master key before generating passwords");
}
}
private void btn_SaveButton_Click(object sender, RoutedEventArgs e)
{
string newSalt = txtSaltInput.Text.Trim();
if (string.IsNullOrEmpty(newSalt))
{
// Don't let a short key be set
MessageBox.Show("Key must be longer than 3 characters", "Key error", MessageBoxButton.OK, MessageBoxImage.Error);
}
else
{
MSPWDStorage.SetMasterKeyFile(MSPWDCrypto.CreateMasterKey(newSalt));
Close();
}
}