public ChuoiNhiPhan He16SangNhiPhan(string hexstring)
{
string binarystring = "";
for (int i = 0; i < hexstring.Length; i++)
{
int hex = Convert.ToInt32(hexstring[i].ToString(), 16);
int factor = 8;
for (int j = 0; j < 4; j++)
{
if (hex >= factor)
{
hex -= factor;
binarystring += "1";
}
else
{
binarystring += "0";
}
factor /= 2;
}
}
ChuoiNhiPhan chuoiNhiPhan = new ChuoiNhiPhan(binarystring.Length);
for (int i = 0; i < binarystring.Length; i++)
{
chuoiNhiPhan.MangNhiPhan[i] = int.Parse(binarystring[i].ToString());
}
return(chuoiNhiPhan);
}
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 static int ChuyenNhiPhanSangSo(ChuoiNhiPhan ChuoiVao)
{
int KQ = 0;
for (int i = ChuoiVao.DoDai - 1; i >= 0; i--)
{
KQ += ChuoiVao.MangNhiPhan[i] * (int)Math.Pow(2, ChuoiVao.DoDai - i - 1);
}
return(KQ);
}
public Khoa(string khoa)
{
//KhoaChinh = new ChuoiHexa(khoa);
//if (!KhoaChinh.KiemTra())
//{
// return;
//}
string hex = ChuyenChuSangHe16(khoa);
KhoaChinhNhiPhan = He16SangNhiPhan(hex);
}
public static string ChuyenNhiPhanSangChu(ChuoiNhiPhan ChuoiVao)
{
int soChu = ChuoiVao.DoDai / 8;
ChuoiNhiPhan[] MangChuoi = ChuoiVao.Chia(soChu);
string KQ = "";
foreach (var ch in MangChuoi)
{
KQ += (char)ChuoiNhiPhan.ChuyenNhiPhanSangSo(ch);
}
return(KQ);
}
public string ThucHienDES(string ChuoiVao, int MaHoaHayGiaiMa)// 1 ma hoa, -1 giai ma
{
ChuoiNhiPhan chuoiNhiPhan = ChuoiNhiPhan.ChuyenChuSangNhiPhan(ChuoiVao);
//ChuoiHexa chuoiHexa = new ChuoiHexa(ChuoiVao);
//chuoiNhiPhan = chuoiHexa.chuoiNhiPhan;
ChuoiNhiPhan KQ = ThucHienDES(ChinhDoDaiChuoiVao(chuoiNhiPhan), MaHoaHayGiaiMa);
return(KQ.Text);
return(ChuoiNhiPhan.ChuyenNhiPhanSangChu(KQ));
}
public ChuoiNhiPhan Cong(ChuoiNhiPhan chuoi2)
{
ChuoiNhiPhan ChuoiKQ = new ChuoiNhiPhan(chuoi2.DoDai + this.DoDai);
for (int i = 0; i < DoDai; i++)
{
ChuoiKQ.MangNhiPhan[i] = MangNhiPhan[i];
}
for (int i = 0; i < chuoi2.DoDai; i++)
{
ChuoiKQ.MangNhiPhan[DoDai + i] = chuoi2.MangNhiPhan[i];
}
return(ChuoiKQ);
}
public ChuoiHexa(string chuoi)
{
this.Chuoi = chuoi.ToUpper();
ChuoiNhiPhan chNP;
if (KiemTra())
{
chuoiNhiPhan = new ChuoiNhiPhan(0);
foreach (var ch in Chuoi)
{
chNP = ChuoiNhiPhan.ChuyenSoSangNhiPhan(ChuoiHexa.ChuyenHexaSangHe10(ch), 4);
chuoiNhiPhan = chuoiNhiPhan.Cong(chNP);
}
}
}
public ChuoiNhiPhan[] ChiaDoi( )
{
ChuoiNhiPhan ChuoiTrai = new ChuoiNhiPhan(this.DoDai / 2);
ChuoiNhiPhan ChuoiPhai = new ChuoiNhiPhan(DoDai - ChuoiTrai.DoDai);
for (int i = 0; i < ChuoiTrai.DoDai; i++)
{
ChuoiTrai.MangNhiPhan[i] = MangNhiPhan[i];
}
for (int i = 0; i < ChuoiPhai.DoDai; i++)
{
ChuoiPhai.MangNhiPhan[i] = MangNhiPhan[i + ChuoiTrai.DoDai];
}
return(new ChuoiNhiPhan[] { ChuoiTrai, ChuoiPhai });
}
public ChuoiNhiPhan DichTraiBit(int SoBitDich)
{
ChuoiNhiPhan KQ = new ChuoiNhiPhan(MangNhiPhan);
int tam = 0;
for (int i = 0; i < SoBitDich; i++)
{
tam = MangNhiPhan[0];
for (int j = 0; j < MangNhiPhan.Length - 1; j++)
{
KQ.MangNhiPhan[j] = MangNhiPhan[j + 1];
}
KQ.MangNhiPhan[MangNhiPhan.Length - 1] = tam;
}
return(KQ);
}
public static ChuoiNhiPhan ChuyenSoSangNhiPhan(int SoInput, int doDai)
{
//int doDai = (int)Math.Log(SoInput, 2);
//if (SoInput == 0)
// doDai = 0;
ChuoiNhiPhan ChuoiKQ = new ChuoiNhiPhan(doDai);
int i = doDai - 1;
while (SoInput > 0)
{
ChuoiKQ.MangNhiPhan[i] = SoInput % 2;
SoInput = SoInput / 2;
i--;
}
return(ChuoiKQ);
}
public ChuoiNhiPhan ChinhDoDaiChuoiVao(ChuoiNhiPhan vao)
{
if (vao.DoDai % 64 != 0)
{
int mode = vao.DoDai % 64;
int thieu = 64 - mode;
int[] mang = new int[vao.DoDai + thieu];
for (int i = 0; i < vao.MangNhiPhan.Length; i++)
{
mang[i] = vao.MangNhiPhan[i];
}
return(new ChuoiNhiPhan(mang));
}
else
{
return(vao);
}
}
public ChuoiNhiPhan[] Chia(int SoLuong)
{
ChuoiNhiPhan[] KQ = new ChuoiNhiPhan[SoLuong];
ChuoiNhiPhan chuoi;
int SoBit = DoDai / SoLuong;
int[] NhiPhan = new int[SoBit];
for (int i = 0; i < SoLuong; i++)
{
NhiPhan = new int[SoBit];
for (int j = i * SoBit; j < i * SoBit + SoBit; j++)
{
NhiPhan[j - i * SoBit] = MangNhiPhan[j];
}
chuoi = new ChuoiNhiPhan(NhiPhan);
KQ[i] = chuoi;
}
return(KQ);
}
public static ChuoiNhiPhan ChuyenChuSangNhiPhan(string text)
{
StringBuilder binarystring = new StringBuilder(text.Length * 8);
foreach (char word in text)
{
int binary = (int)word;
int factor = 128;
for (int i = 0; i < 8; i++)
{
if (binary >= factor)
{
binary -= factor;
binarystring.Append("1");
}
else
{
binarystring.Append("0");
}
factor /= 2;
}
}
binarystring.ToString();
//foreach (var ch in chuoiVao)
//{
// KQ = KQ.Cong(new ChuoiNhiPhan(ch));
//}
int[] MangNhiPhan = new int[binarystring.Length];
for (int i = 0; i < binarystring.Length; i++)
{
MangNhiPhan[i] = int.Parse(binarystring[i].ToString());
}
ChuoiNhiPhan KQ = new ChuoiNhiPhan(MangNhiPhan);
return(KQ);
}
public ChuoiNhiPhan XOR(ChuoiNhiPhan Chuoi2)
{
if (DoDai != Chuoi2.DoDai)
{
return(null);
}
ChuoiNhiPhan ChuoiKQ = new ChuoiNhiPhan(DoDai);
int x = 0, y = 0;
for (int i = 0; i < ChuoiKQ.DoDai; i++)
{
x = MangNhiPhan[i];
y = Chuoi2.MangNhiPhan[i];
if (x != y)
{
ChuoiKQ.MangNhiPhan[i] = 1;
}
else
{
ChuoiKQ.MangNhiPhan[i] = 0;
}
}
return(ChuoiKQ);
}
