public bool PasswordIsValid(PasswordGeneratorSettings settings, string password)
{
const string RegexLowerCase = @"[a-z]";
const string RegexUpperCase = @"[A-Z]";
const string RegexNumeric = @"[\d]";
const string RegexSpecial = @"([!#$%&*@\\])+";
bool lowerCaseIsValid = !settings.IncludeLowerCase || (settings.IncludeLowerCase && Regex.IsMatch(password, RegexLowerCase));
bool upperCaseIsValid = !settings.IncludeUpperCase || (settings.IncludeUpperCase && Regex.IsMatch(password, RegexUpperCase));
bool numericIsValid = !settings.IncludeNumbers || (settings.IncludeNumbers && Regex.IsMatch(password, RegexNumeric));
bool symbolsAreValid = !settings.IncludeSpecial || (settings.IncludeSpecial && Regex.IsMatch(password, RegexSpecial));
return(lowerCaseIsValid && upperCaseIsValid && numericIsValid && symbolsAreValid);
}
/// <summary>
/// Generate Password based of the PasswordGeneratorSettings Criteria.
/// </summary>
/// <param name="_passwordGeneratorSettings"></param>
/// <returns></returns>
public string GeneratePassword(PasswordGeneratorSettings _passwordGeneratorSettings)
{
const int MaximumIdenticalCharacters = 2;
char[] password = new char[_passwordGeneratorSettings.PasswordLength];
int characterSetLength = _passwordGeneratorSettings.CharacterSet.Length;
System.Random random = new System.Random();
for (int characterPosition = 0; characterPosition < _passwordGeneratorSettings.PasswordLength; characterPosition++)
{
password[characterPosition] = _passwordGeneratorSettings.CharacterSet[random.Next(characterSetLength - 1)];
bool moreThanTwoIdenticalInARow = characterPosition > MaximumIdenticalCharacters && password[characterPosition] == password[characterPosition - 1] && password[characterPosition - 1] == password[characterPosition - 2];
if (moreThanTwoIdenticalInARow)
{
characterPosition--;
}
}
return(string.Join(null, password));
}
