private void ChangeValue()
{
var value = Mathc.ValueOf(this.AssociatedObject.Value, this.AssociatedObject.Maximum, this.mainGrid.ActualWidth);
ProgressBarProperties.SetValue(this.AssociatedObject, value);
}
/// <summary>
/// Checks the password's strength
/// </summary>
/// <param name="password">The password to check</param>
/// <returns>Returns <see cref="PasswordScore"/> rating</returns>
public static PasswordScore GetPasswordScore(string password)
{
// Origin: http://social.msdn.microsoft.com/Forums/vstudio/en-US/5e3f27d2-49af-410a-85a2-3c47e3f77fb1/how-to-check-for-password-strength
if (string.IsNullOrEmpty(password))
{
return(PasswordScore.Blank);
}
int score = 1;
if (password.Length < 4)
{
return(PasswordScore.VeryWeak);
}
if (password.Length >= 8)
{
score++;
}
if (password.Length >= 12)
{
score++;
}
// If 90% of the password are numbers then lower the score
if (Mathc.ValueOf(Regex.Match(password, @"[0-9]+(\.[0-9][0-9]?)?").Length, password.Length, 100) > 90)
{
score--;
}
// At least 4 of the chars should be numbers
else if (Regex.Match(password, @"[0-9]+(\.[0-9][0-9]?)?").Length > 4)
{
score++;
}
// If 99% of the password are letters then lower the score
if (Mathc.ValueOf(Regex.Match(password, @"^(?=.*[a-z])(?=.*[A-Z]).+$").Length, password.Length, 100) == 99)
{
score--;
}
else if (Regex.IsMatch(password, @"^(?=.*[a-z])(?=.*[A-Z]).+$"))
{
score++;
}
if (Regex.IsMatch(password, @"[!,@,#,$,%,^,&,*,?,_,~,-,£,(,)]"))
{
score++;
}
if (string.Equals(password, "password", StringComparison.CurrentCultureIgnoreCase) ||
string.Equals(password, "p4ssw0rd", StringComparison.CurrentCultureIgnoreCase) ||
string.Equals(password, "p455w0rd", StringComparison.CurrentCultureIgnoreCase))
{
score = 1;
}
if (password.Distinct(new DynamicEqualityComparer <char>((a, b) => a == b)).Count() == 1)
{
score = score - 2;
}
return((PasswordScore)Mathc.Clamp(score, 1, 5));
}