public bool Process()
{
Boolean retVal = false;
try
{
_state = Common.NodeState.Processing;
SCrypt scrypt = new SCrypt(Iterations.Value, BlockSize.Value, ThreadCount.Value);
byte[] saltOut;
byte[] bytes = scrypt.DeriveBytes((String)_password.Value, _salt.Value, out saltOut);
_derivedKey.SetValue(bytes);
retVal = true;
}
finally
{
_state = Common.NodeState.Processed;
if (retVal)
{
Processed?.Invoke(this, EventArgs.Empty);
}
}
if (retVal)
{
if (_next != null && _next.Length > 0)
{
return(_next[0].Process());
}
else
{
return(true);
}
}
else
{
return(false);
}
}
private Tuple <bool, TimeSpan> TestPasswordDerivationFunction(int count)
{
TimeSpan elapsed = new TimeSpan(0);
bool success = false;
try
{
Device.BeginInvokeOnMainThread(() =>
{
TestSettingsButtonText = "Please Wait...";
View.IsEnabled = false;
});
Stopwatch stopWatch = new Stopwatch();
string password = "";
byte[] salt = new byte[16];
if (PBKDF2Enabled)
{
Rfc2898DeriveBytes pbkd2f = new Rfc2898DeriveBytes(
password,
salt,
int.Parse(PBKDF2IterationCount));
stopWatch.Restart();
int curKey = 1;
while (curKey < count)
{
byte[] result = pbkd2f.GetBytes(32);
curKey += 1;
}
elapsed = stopWatch.Elapsed;
success = true;
}
else
{
SCrypt scrypt = new SCrypt(
int.Parse(SCryptIterationCount),
int.Parse(SCryptBlockSize),
int.Parse(SCryptThreadCount));
byte[] saltUsed = null;
stopWatch.Restart();
int curKey = 1;
while (curKey < count)
{
byte[] result = scrypt.DeriveBytes(
password,
salt,
out saltUsed);
curKey += 1;
}
elapsed = stopWatch.Elapsed;
success = true;
}
}
finally
{
Device.BeginInvokeOnMainThread(() =>
{
TestSettingsButtonText = "Test Settings";
View.IsEnabled = true;
});
}
return(new Tuple <bool, TimeSpan>(success, elapsed));
}