private async Task UpdatePasswordStrengthIndicator(string newValue)
{
await Task.Yield();
string password = (string)newValue;
if (!String.IsNullOrEmpty(password))
{
bool isWeak = Dictionaries.Instance.IsKnownWeak(password);
if (isWeak)
{
_strengthCheck = StrengthCheckResult.InWeakDictionary;
StrengthIndicatorBackgroundColour = Color.Red;
}
else
{
double strength = SimpleRandomGenerator.GetStrength(password);
_strengthCheck = strength >= _threshold ? StrengthCheckResult.OK : StrengthCheckResult.FailComplexityCheck;
StrengthIndicatorBackgroundColour = _strengthCheck == StrengthCheckResult.OK ? Color.Green : Color.Orange;
}
}
else
{
_strengthCheck = StrengthCheckResult.None;
StrengthIndicatorBackgroundColour = Color.Gray;
}
OnPropertyChanged("StrengthIndicatorColWidth");
OnPropertyChanged("StrengthIndicatorText");
OnPropertyChanged("TextIsSet");
}
public static bool IsWeak(this Credential credential)
{
if (_weakThreshold == -1)
{
int recommendedCharSelection = SimpleRandomGenerator.GetTotalCharCountForSelection(SimpleRandomGenerator.CharSelection.Lowercase |
SimpleRandomGenerator.CharSelection.Uppercase |
SimpleRandomGenerator.CharSelection.Digits |
SimpleRandomGenerator.CharSelection.Minus |
SimpleRandomGenerator.CharSelection.Underline);
_weakThreshold = Math.Pow(12, recommendedCharSelection);
}
double strength = SimpleRandomGenerator.GetStrength(credential.Password);
return(strength < _weakThreshold);
}