/// <summary>
/// Estimates the attempts required to guess the password.
/// </summary>
/// <param name="match">The match.</param>
/// <param name="password">The actual password.</param>
/// <returns>The guesses estimate.</returns>
public static double EstimateGuesses(Match match, string password)
{
if (match.Guesses != 0)
{
return(match.Guesses);
}
var minGuesses = 1.0;
if (match.Token.Length < password.Length)
{
minGuesses = match.Token.Length == 1 ? BruteForceGuessesCalculator.MinSubmatchGuessesSingleCharacter : BruteForceGuessesCalculator.MinSubmatchGuessesMultiCharacter;
}
var guesses = 0.0;
switch (match.Pattern)
{
case "bruteforce":
guesses = BruteForceGuessesCalculator.CalculateGuesses(match as BruteForceMatch);
break;
case "date":
guesses = DateGuessesCalculator.CalculateGuesses(match as DateMatch);
break;
case "dictionary":
guesses = DictionaryGuessesCalculator.CalculateGuesses(match as DictionaryMatch);
break;
case "regex":
guesses = RegexGuessesCalculator.CalculateGuesses(match as RegexMatch);
break;
case "repeat":
guesses = RepeatGuessesCalculator.CalculateGuesses(match as RepeatMatch);
break;
case "sequence":
guesses = SequenceGuessesCalculator.CalculateGuesses(match as SequenceMatch);
break;
case "spatial":
guesses = SpatialGuessesCalculator.CalculateGuesses(match as SpatialMatch);
break;
}
match.Guesses = Math.Max(guesses, minGuesses);
return(match.Guesses);
}
public void MultipliesByFourForSeparators()
{
var match = new DateMatch
{
Token = "1923",
Separator = "/",
Year = 1923,
Month = 1,
Day = 1,
i = 1,
j = 2,
};
var actual = DateGuessesCalculator.CalculateGuesses(match);
var expected = 365 * (DateMatcher.ReferenceYear - match.Year) * 4;
actual.Should().Be(expected);
}
public void CalculatesBasedOnReferenceYear()
{
var match = new DateMatch
{
Token = "1923",
Separator = string.Empty,
Year = 1923,
Month = 1,
Day = 1,
i = 1,
j = 2,
};
var actual = DateGuessesCalculator.CalculateGuesses(match);
var expected = 365 * (DateMatcher.ReferenceYear - match.Year);
actual.Should().Be(expected);
}
public void AssumesMinYearSpaceForRecentYears()
{
var match = new DateMatch
{
Token = "2010",
Separator = string.Empty,
Year = 2010,
Month = 1,
Day = 1,
i = 1,
j = 2,
};
var actual = DateGuessesCalculator.CalculateGuesses(match);
var expected = 365 * DateGuessesCalculator.MinimumYearSpace;
actual.Should().Be(expected);
}
