public void SinhKhoaCon(int MaHoaHayGiaiMa) // 1 la ma hoa -1 la giai ma
{
DayKhoaPhu = new ChuoiNhiPhan[16];
ChuoiNhiPhan ChuoiTrai, ChuoiPhai, MotKhoaPhu;
// PC1
ChuoiNhiPhan[] ChuoiSauPC1 = CacThongSo.TinhPC1(KhoaChinhNhiPhan);
ChuoiTrai = ChuoiSauPC1[0];
ChuoiPhai = ChuoiSauPC1[1];
for (int i = 0; i < 16; i++)
{
// Dich bit
if (MaHoaHayGiaiMa == 1) // ma hoa
{
ChuoiTrai = ChuoiTrai.DichTraiBit(CacThongSo.soBitDichTaiCacVong[i]);
ChuoiPhai = ChuoiPhai.DichTraiBit(CacThongSo.soBitDichTaiCacVong[i]);
}
else
{
ChuoiTrai = ChuoiTrai.DichPhaiBit(CacThongSo.soBitDichTaiCacVong[i]);
ChuoiPhai = ChuoiPhai.DichPhaiBit(CacThongSo.soBitDichTaiCacVong[i]);
}
// PC2
MotKhoaPhu = CacThongSo.TinhPC2(ChuoiTrai, ChuoiPhai);
if (MaHoaHayGiaiMa == 1)
{
DayKhoaPhu[i] = MotKhoaPhu;
}
else
{
DayKhoaPhu[15 - i] = MotKhoaPhu;
}
}
}
public ChuoiNhiPhan ThucHienDES(ChuoiNhiPhan ChuoiVaoDai, int MaHoaHayGiaiMa)// 1 ma hoa, -1 giai ma
{
KhoaDES.SinhKhoaCon(MaHoaHayGiaiMa);
ChuoiNhiPhan[] DSChuoiVao = ChuoiVaoDai.Chia(ChuoiVaoDai.DoDai / 64);
ChuoiNhiPhan ChuoiVao, ChuoiKQ;
ChuoiKQ = new ChuoiNhiPhan(0);
for (int k = 0; k < DSChuoiVao.Length; k++)
{
ChuoiVao = DSChuoiVao[k];
ChuoiNhiPhan[] ChuoiSauIP;
ChuoiNhiPhan ChuoiSauIP_1;
ChuoiNhiPhan L, R, F, TG;
ChuoiSauIP = CacThongSo.TinhIP(ChuoiVao, MaHoaHayGiaiMa);
L = ChuoiSauIP[0];
R = ChuoiSauIP[1];
for (int i = 0; i < 16; i++)
{
F = HamF(R, KhoaDES.DayKhoaPhu[i]);
L = L.XOR(F);
TG = L;
L = R;
R = TG;
}
ChuoiSauIP_1 = CacThongSo.TinhIP_1(R, L, MaHoaHayGiaiMa);
ChuoiKQ = ChuoiKQ.Cong(ChuoiSauIP_1);
}
return(ChuoiKQ);
}
private ChuoiNhiPhan HamF(ChuoiNhiPhan chuoiVao, ChuoiNhiPhan KhoaCon)
{
ChuoiNhiPhan KQ = CacThongSo.TinhE(chuoiVao);
KQ = KQ.XOR(KhoaCon);
KQ = CacThongSo.TinhSBox(KQ);
KQ = CacThongSo.TinhP(KQ);
return(KQ);
}
public void KhoiTaoMaTranMui()
{
MaTranMui = new double[BanDo.SoThanhPho, BanDo.SoThanhPho];
CacThongSo.KhoiTao();
for (int i = 0; i < BanDo.SoThanhPho; i++)
{
for (int j = 0; j < BanDo.SoThanhPho; j++)
{
MaTranMui[i, j] = CacThongSo.tMax;
}
}
}