/// <summary>
/// S盒
/// </summary>
/// <param name="input">输入（48位）</param>
/// <returns>输出（32位）</returns>
private static BitArray SBox(BitArray input)
{
BitArray output = new BitArray(32);
//8个S盒
for (int i = 0; i < 8; i++)
{
int col = 0;
int row = 0;
GenerateRowAndColumnNumber(input, i*6, out row, out col);
//output.SetRange(i*4, 4, SwitchSBox(i)[row][col]);
output.SetRange(i*4, 4, SB[i][row][col]);
}
return output;
}
/// <summary>
/// 生成子密钥
/// </summary>
/// <param name="key">密钥</param>
/// <returns></returns>
private static BitArray[] GenerateKeys(BitArray key)
{
//置换选择1 64位->56位
key = SwapSelect1(key);
//Debug.WriteLine(key.PrintInBinary());
BitArray[] output = new BitArray[16];
BitArray c = new BitArray(28);
BitArray d = new BitArray(28);
c.SetRange(0, 28, key);
d.SetRange(0, 28, key, 28);
//Debug.WriteLine(c.PrintInBinary());
//Debug.WriteLine(d.PrintInBinary());
for (int i = 0; i < 16; i++)
{
//密钥产生
//循环左移
c = c.ROL(LeftShiftTime[i]);
d = d.ROL(LeftShiftTime[i]);
//Debug.WriteLine("i:{2} C:{0} D:{1}", c.PrintInBinary(), d.PrintInBinary(), i+1);
//置换选择2
output[i] = SwapSelect2(c.Append(d));
//Debug.WriteLine(output[i].PrintInBinary());
//Debug.WriteLine("C:{0} D:{1} out:{2}",c.PrintInHex(),d.PrintInHex(),output[i].PrintInHex());
}
return output;
}