public static string decipherCText(string Text, char[] key)
{
int[] cText = new int[Text.Length];
for (int i = 0; i < Text.Length; i++)
{
cText[i] = Text[i];
}
int[] plainText = new int[cText.Length];
if (key.Length == 0)
{
throw new Exception("Empty key");
}
for (int i = 0; i <= plainText.Length / key.Length; i++)
{
for (int j = 0; j < key.Length; j++)
{
if ((key.Length * i + j) < cText.Length)
{
int xor = cText[key.Length * i + j] ^ key[j];
plainText[key.Length * i + j] = xor;
}
}
}
return(IntConversion.intsToHex(plainText));
}
public static string crackMV(string hex)
{
string pText = "";
int[] hexBytes = IntConversion.hexToInts(hex);
int likelyKSize = findKeySize(hexBytes);
List <int[]> transposedBlocks = transposeBlocks(hexBytes, likelyKSize);
List <int[]> decipheredBlocks = new List <int[]>();
for (int i = 0; i < transposedBlocks.Count; i++)
{
decipheredBlocks.Add(StringConverters.stringToInts(IntSingleVigenere.decipherCaesar(IntConversion.intsToHex(transposedBlocks[i])).Item3));
}
pText = IntConversion.intsToString(undoTranspose(decipheredBlocks));
//Console.WriteLine(likelyKSize + " : " + pText);
return(pText);
}
