/// <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.GetUserStoreForApplication())
{
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 btnSetMasterKey_Click(object sender, RoutedEventArgs e)
{
string newKeyText = txtNewMasterKey.Text.Trim();
if ((string.IsNullOrEmpty(newKeyText)) || (newKeyText.Length < 3))
{
MessageBox.Show("ERROR: Master key not long enough. Key must be longer than 3 characters");
}
else
{
MSPWDStorage.SetMasterKeyFile(MSPWDCrypto.CreateMasterKey(txtNewMasterKey.Text.Trim()));
txtNewMasterKey.Text = string.Empty;
// Add the "delete master key" page back
if (!pvtPages.Items.Contains(tabSpecial))
{
pvtPages.Items.Add(tabSpecial);
}
if (!pvtPages.Items.Contains(tabAlpha))
{
pvtPages.Items.Add(tabAlpha);
}
if (!pvtPages.Items.Contains(tabClean))
{
pvtPages.Items.Add(tabClean);
}
pvtPages.SelectedItem = tabSpecial;
}
}