public void Challenge3()
{
string input = "1b37373331363f78151b7f2b783431333d78397828372d363c78373e783a393b3736";
var expectedKey = (byte)88;
var expectedString = "Cooking MC's like a pound of bacon";
var hexString = new HexString(input);
var decryptor = new SingleByteXorCracker(new BigramCalculator());
var actualKey = decryptor.CrackKey(hexString);
var decryptedBytes = XorUtil.Xor(hexString.Bytes.ToArray(), new[] { actualKey });
var actualString = System.Text.Encoding.ASCII.GetString(decryptedBytes);
Assert.AreEqual(expectedKey, actualKey);
Assert.AreEqual(expectedString, actualString);
}
public void Callenge6()
{
var expectedString = "";//Set1Data.Challenge6Solution;
var expectedKey = System.Text.Encoding.ASCII.GetBytes("Terminator X: Bring the noise");
var input = Set1Data.Challenge6Input.Replace("\r\n", string.Empty);
var encryptedData = Convert.FromBase64String(input);
var singleByteCracker = new SingleByteXorCracker(new BigramCalculator());
var cracker = new MultiByteXorCracker(singleByteCracker);
var actualKey = cracker.CrackKey(encryptedData);
var decryptedData = XorUtil.Xor(encryptedData, actualKey);
var actualString = System.Text.Encoding.ASCII.GetString(decryptedData);
Assert.AreEqual(expectedString, actualString);
Assert.AreEqual(expectedKey, actualKey);
}
public void Challenge4()
{
var expectedString = "Now that the party is jumping\n";
var expectedKey = 53;
var strings = Set1Data.Challenge4Input.Split(new[]
{
'\n', '\r'
}, StringSplitOptions.RemoveEmptyEntries);
var hexStrings = strings.Select(s => new HexString(s)).ToArray();
ITextScoreCalculator textScoreCalculator = new BigramCalculator();
var cracker = new SingleByteXorCracker(textScoreCalculator);
int index;
var actualKey = cracker.CrackKey(hexStrings, out index);
var decrytedBytes = XorUtil.Xor(hexStrings[index].Bytes.ToArray(), new[] { actualKey });
var actualString = System.Text.Encoding.ASCII.GetString(decrytedBytes);
Assert.AreEqual(expectedString, actualString);
Assert.AreEqual(expectedKey, actualKey);
}
