/// <summary>
/// Solves when the configuration is known in advance
/// </summary>
/// <param name="codeWheelSystem"></param>
/// <param name="textToDecode"></param>
public void SolveKnownConfiguration(CryptoWheelSystem <string> codeWheelSystem, string[] textToDecode)
{
codeWheelSystem.SetWheelPositions("a", "12", "45", "58", "85");
var decodedText = codeWheelSystem.EncodeText(textToDecode);
Console.WriteLine(decodedText);
}
/// <summary>
/// Solve by brute force based on output containing common plaintext English words
/// TODO: Add letter distribution score in ranking of candidate cipher wheel configurations
/// TODO: This is currently off by one for the inner wheel (#4)
/// </summary>
/// <param name="codeWheelSystem"></param>
/// <param name="textToDecode"></param>
/// <param name="fileHelper"></param>
public IEnumerable <CandidateSolution> BruteForce(CryptoWheelSystem <string> codeWheelSystem, string[] textToDecode, FileHelper fileHelper)
{
for (var wheel1Index = 0; wheel1Index < 26 /* Move to single setter area*/; wheel1Index++)
{
for (var wheel2Index = 0; wheel2Index < 26; wheel2Index++)
{
for (var wheel3Index = 0; wheel3Index < 26; wheel3Index++)
{
for (var wheel4Index = 0; wheel4Index < 26; wheel4Index++)
{
var decodedText = codeWheelSystem.EncodeText(textToDecode);
if (decodedText.HasFrequentEnglishWord())
{
Console.Clear();
Console.BackgroundColor = ConsoleColor.DarkGreen;
Console.ForegroundColor = ConsoleColor.Red;
Console.WriteLine(
"******************************************************************************");
Console.WriteLine(
$"* BOOM! Decyphered a candidate at {codeWheelSystem.WriteConfigToString()}");
Console.WriteLine(
"******************************************************************************");
Console.WriteLine();
Console.ResetColor();
var candidateSolution = new CandidateSolution
{
DecodedText = decodedText,
WheelConfiguration = codeWheelSystem.WriteConfigToString()
};
yield return(candidateSolution);
}
codeWheelSystem.ClearCache();
codeWheelSystem.ShiftWheelTopPositionRight(4);
Console.Write(".");
}
codeWheelSystem.ShiftWheelTopPositionRight(3);
Console.Write("#");
}
codeWheelSystem.ShiftWheelTopPositionRight(2);
Console.Write("//");
}
codeWheelSystem.ShiftWheelTopPositionRight(1);
Console.Write("&&&");
}
}
