public static Word SubWord(this Word word)
{
var bytes = new List <Entities.Byte>();
for (var i = 0; i < word.Value.Length; i++)
{
var replacedByte = new Entities.Byte(SBoxHelper.GetReplacement(word.Value[i].Value));
bytes.Add(replacedByte);
}
return(new Word(bytes.ToArray()));
}
public static Word Shift(this Word word)
{
var bytesArray = word.Value;
AES.Entities.Byte[] resultArray = new AES.Entities.Byte[bytesArray.Length];
for (int i = 0; i < bytesArray.Length; i++)
{
if (i < bytesArray.Length - 1)
{
resultArray[i] = bytesArray[i + 1];
}
else
{
resultArray[i] = bytesArray[0];
}
}
return(new Word(resultArray));
}
public static List <Word> ExtractWords(this string plainText)
{
var words = new List <Word>();
for (var i = 0; i < plainText.Length; i += WordStringLength)
{
var wordString = plainText.Substring(i, Math.Min(WordStringLength, plainText.Length - i));
var bytes = new List <AES.Entities.Byte>();
for (var j = 0; j < wordString.Length; j += ByteStringLength)
{
var byteString = wordString.Substring(j, Math.Min(ByteStringLength, wordString.Length - j));
var _byte = new AES.Entities.Byte(byteString);
bytes.Add(_byte);
}
words.Add(new Word(bytes.ToArray()));
}
return(words);
}
public static Entities.Byte Xor(this Entities.Byte _byte, Entities.Byte other)
{
return(new Entities.Byte(_byte.Value ^ other.Value));
}