//Расширение блоков R с 4 до 6 бит
private string r4to6(string bitStr)
{
string[] formattedBitStr = Utills.BinaryFormat(bitStr, 4).Split(' ');
StringBuilder extendedBitStr;
StringBuilder result = new StringBuilder(48);
for (int i = 0; i < formattedBitStr.Length; i++)
{
extendedBitStr = new StringBuilder(6);
extendedBitStr.Append(formattedBitStr[(i - 1 + 8) % 8].ElementAt(3));
extendedBitStr.Append(formattedBitStr[i]);
extendedBitStr.Append(formattedBitStr[(i + 1 + 8) % 8].ElementAt(0));
result.Append(extendedBitStr);
}
return(result.ToString());
}
private void Init()
{
var r0_str = message.Substring(message.Length / 2, message.Length / 2);
r0 = Utills.StickedBinaryMsg(r0_str);
var x0_str = key;
x0 = Utills.StickedBinaryMsg(x0_str);
fR0X0 = Utills.Modulo2Pow32(r0, x0);
filled = SubstituteElements(fR0X0);
shifted = Utills.Shift(filled, -11);
var l0_str = message.Substring(0, message.Length / 2);
l0 = Utills.StickedBinaryMsg(l0_str);
r1 = Utills.Modulo2(l0, shifted);
}