class CTDES
{
enum Mode { ENCRYPT, DECRYPT };
private static UInt32[] KnL = new UInt32[32];
private Byte[] Df_Key = new Byte[24]{
0x01, 0x23, 0x45, 0x67, 0x89, 0xab, 0xcd, 0xef,
0xfe, 0xdc, 0xba, 0x98, 0x76, 0x54, 0x32, 0x10,
0x89, 0xab, 0xcd, 0xef, 0x01, 0x23, 0x45, 0x67
};
private static readonly ushort[] bytebit = new ushort[8] { 0x80, 0x40, 0x20, 0x10, 0x08, 0x04, 0x02, 0x01 };
private static readonly UInt32[] bigbyte = new UInt32[24]{
0x800000, 0x400000, 0x200000, 0x100000,
0x80000, 0x40000, 0x20000, 0x10000,
0x8000, 0x4000, 0x2000, 0x1000,
0x800, 0x400, 0x200, 0x100,
0x80, 0x40, 0x20, 0x10,
0x8, 0x4, 0x2, 0x1
};
private static readonly Byte[] pc1 = new Byte[56]{
56, 48, 40, 32, 24, 16, 8, 0, 57, 49, 41, 33, 25, 17,
9, 1, 58, 50, 42, 34, 26, 18, 10, 2, 59, 51, 43, 35,
62, 54, 46, 38, 30, 22, 14, 6, 61, 53, 45, 37, 29, 21,
13, 5, 60, 52, 44, 36, 28, 20, 12, 4, 27, 19, 11, 3
};
private static readonly Byte[] totrot = new Byte[16] { 1, 2, 4, 6, 8, 10, 12, 14, 15, 17, 19, 21, 23, 25, 27, 28 };
private static readonly Byte[] pc2 = new Byte[48]{
13, 16, 10, 23, 0, 4, 2, 27, 14, 5, 20, 9,
22, 18, 11, 3, 25, 7, 15, 6, 26, 19, 12, 1,
40, 51, 30, 36, 46, 54, 29, 39, 50, 44, 32, 47,
43, 48, 38, 55, 33, 52, 45, 41, 49, 35, 28, 31
};
private static readonly UInt32[] SP1 = new UInt32[64]{
0x01010400, 0x00000000, 0x00010000, 0x01010404,
0x01010004, 0x00010404, 0x00000004, 0x00010000,
0x00000400, 0x01010400, 0x01010404, 0x00000400,
0x01000404, 0x01010004, 0x01000000, 0x00000004,
0x00000404, 0x01000400, 0x01000400, 0x00010400,
0x00010400, 0x01010000, 0x01010000, 0x01000404,
0x00010004, 0x01000004, 0x01000004, 0x00010004,
0x00000000, 0x00000404, 0x00010404, 0x01000000,
0x00010000, 0x01010404, 0x00000004, 0x01010000,
0x01010400, 0x01000000, 0x01000000, 0x00000400,
0x01010004, 0x00010000, 0x00010400, 0x01000004,
0x00000400, 0x00000004, 0x01000404, 0x00010404,
0x01010404, 0x00010004, 0x01010000, 0x01000404,
0x01000004, 0x00000404, 0x00010404, 0x01010400,
0x00000404, 0x01000400, 0x01000400, 0x00000000,
0x00010004, 0x00010400, 0x00000000, 0x01010004
};
private static readonly UInt32[] SP2 = new UInt32[64]{
0x80108020, 0x80008000, 0x00008000, 0x00108020,
0x00100000, 0x00000020, 0x80100020, 0x80008020,
0x80000020, 0x80108020, 0x80108000, 0x80000000,
0x80008000, 0x00100000, 0x00000020, 0x80100020,
0x00108000, 0x00100020, 0x80008020, 0x00000000,
0x80000000, 0x00008000, 0x00108020, 0x80100000,
0x00100020, 0x80000020, 0x00000000, 0x00108000,
0x00008020, 0x80108000, 0x80100000, 0x00008020,
0x00000000, 0x00108020, 0x80100020, 0x00100000,
0x80008020, 0x80100000, 0x80108000, 0x00008000,
0x80100000, 0x80008000, 0x00000020, 0x80108020,
0x00108020, 0x00000020, 0x00008000, 0x80000000,
0x00008020, 0x80108000, 0x00100000, 0x80000020,
0x00100020, 0x80008020, 0x80000020, 0x00100020,
0x00108000, 0x00000000, 0x80008000, 0x00008020,
0x80000000, 0x80100020, 0x80108020, 0x00108000
};
private static readonly UInt32[] SP3 = new UInt32[64]{
0x00000208, 0x08020200, 0x00000000, 0x08020008,
0x08000200, 0x00000000, 0x00020208, 0x08000200,
0x00020008, 0x08000008, 0x08000008, 0x00020000,
0x08020208, 0x00020008, 0x08020000, 0x00000208,
0x08000000, 0x00000008, 0x08020200, 0x00000200,
0x00020200, 0x08020000, 0x08020008, 0x00020208,
0x08000208, 0x00020200, 0x00020000, 0x08000208,
0x00000008, 0x08020208, 0x00000200, 0x08000000,
0x08020200, 0x08000000, 0x00020008, 0x00000208,
0x00020000, 0x08020200, 0x08000200, 0x00000000,
0x00000200, 0x00020008, 0x08020208, 0x08000200,
0x08000008, 0x00000200, 0x00000000, 0x08020008,
0x08000208, 0x00020000, 0x08000000, 0x08020208,
0x00000008, 0x00020208, 0x00020200, 0x08000008,
0x08020000, 0x08000208, 0x00000208, 0x08020000,
0x00020208, 0x00000008, 0x08020008, 0x00020200
};
private static readonly UInt32[] SP4 = new UInt32[64]{
0x00802001, 0x00002081, 0x00002081, 0x00000080,
0x00802080, 0x00800081, 0x00800001, 0x00002001,
0x00000000, 0x00802000, 0x00802000, 0x00802081,
0x00000081, 0x00000000, 0x00800080, 0x00800001,
0x00000001, 0x00002000, 0x00800000, 0x00802001,
0x00000080, 0x00800000, 0x00002001, 0x00002080,
0x00800081, 0x00000001, 0x00002080, 0x00800080,
0x00002000, 0x00802080, 0x00802081, 0x00000081,
0x00800080, 0x00800001, 0x00802000, 0x00802081,
0x00000081, 0x00000000, 0x00000000, 0x00802000,
0x00002080, 0x00800080, 0x00800081, 0x00000001,
0x00802001, 0x00002081, 0x00002081, 0x00000080,
0x00802081, 0x00000081, 0x00000001, 0x00002000,
0x00800001, 0x00002001, 0x00802080, 0x00800081,
0x00002001, 0x00002080, 0x00800000, 0x00802001,
0x00000080, 0x00800000, 0x00002000, 0x00802080
};
private static readonly UInt32[] SP5 = new UInt32[64]{
0x00000100, 0x02080100, 0x02080000, 0x42000100,
0x00080000, 0x00000100, 0x40000000, 0x02080000,
0x40080100, 0x00080000, 0x02000100, 0x40080100,
0x42000100, 0x42080000, 0x00080100, 0x40000000,
0x02000000, 0x40080000, 0x40080000, 0x00000000,
0x40000100, 0x42080100, 0x42080100, 0x02000100,
0x42080000, 0x40000100, 0x00000000, 0x42000000,
0x02080100, 0x02000000, 0x42000000, 0x00080100,
0x00080000, 0x42000100, 0x00000100, 0x02000000,
0x40000000, 0x02080000, 0x42000100, 0x40080100,
0x02000100, 0x40000000, 0x42080000, 0x02080100,
0x40080100, 0x00000100, 0x02000000, 0x42080000,
0x42080100, 0x00080100, 0x42000000, 0x42080100,
0x02080000, 0x00000000, 0x40080000, 0x42000000,
0x00080100, 0x02000100, 0x40000100, 0x00080000,
0x00000000, 0x40080000, 0x02080100, 0x40000100
};
private static readonly UInt32[] SP6 = new UInt32[64]{
0x20000010, 0x20400000, 0x00004000, 0x20404010,
0x20400000, 0x00000010, 0x20404010, 0x00400000,
0x20004000, 0x00404010, 0x00400000, 0x20000010,
0x00400010, 0x20004000, 0x20000000, 0x00004010,
0x00000000, 0x00400010, 0x20004010, 0x00004000,
0x00404000, 0x20004010, 0x00000010, 0x20400010,
0x20400010, 0x00000000, 0x00404010, 0x20404000,
0x00004010, 0x00404000, 0x20404000, 0x20000000,
0x20004000, 0x00000010, 0x20400010, 0x00404000,
0x20404010, 0x00400000, 0x00004010, 0x20000010,
0x00400000, 0x20004000, 0x20000000, 0x00004010,
0x20000010, 0x20404010, 0x00404000, 0x20400000,
0x00404010, 0x20404000, 0x00000000, 0x20400010,
0x00000010, 0x00004000, 0x20400000, 0x00404010,
0x00004000, 0x00400010, 0x20004010, 0x00000000,
0x20404000, 0x20000000, 0x00400010, 0x20004010
};
private static readonly UInt32[] SP7 = new UInt32[64]{
0x00200000, 0x04200002, 0x04000802, 0x00000000,
0x00000800, 0x04000802, 0x00200802, 0x04200800,
0x04200802, 0x00200000, 0x00000000, 0x04000002,
0x00000002, 0x04000000, 0x04200002, 0x00000802,
0x04000800, 0x00200802, 0x00200002, 0x04000800,
0x04000002, 0x04200000, 0x04200800, 0x00200002,
0x04200000, 0x00000800, 0x00000802, 0x04200802,
0x00200800, 0x00000002, 0x04000000, 0x00200800,
0x04000000, 0x00200800, 0x00200000, 0x04000802,
0x04000802, 0x04200002, 0x04200002, 0x00000002,
0x00200002, 0x04000000, 0x04000800, 0x00200000,
0x04200800, 0x00000802, 0x00200802, 0x04200800,
0x00000802, 0x04000002, 0x04200802, 0x04200000,
0x00200800, 0x00000000, 0x00000002, 0x04200802,
0x00000000, 0x00200802, 0x04200000, 0x00000800,
0x04000002, 0x04000800, 0x00000800, 0x00200002
};
private static readonly UInt32[] SP8 = new UInt32[64]{
0x10001040, 0x00001000, 0x00040000, 0x10041040,
0x10000000, 0x10001040, 0x00000040, 0x10000000,
0x00040040, 0x10040000, 0x10041040, 0x00041000,
0x10041000, 0x00041040, 0x00001000, 0x00000040,
0x10040000, 0x10000040, 0x10001000, 0x00001040,
0x00041000, 0x00040040, 0x10040040, 0x10041000,
0x00001040, 0x00000000, 0x00000000, 0x10040040,
0x10000040, 0x10001000, 0x00041040, 0x00040000,
0x00041040, 0x00040000, 0x10041000, 0x00001000,
0x00000040, 0x10040040, 0x00001000, 0x00041040,
0x10001000, 0x00000040, 0x10000040, 0x10040000,
0x10040040, 0x10000000, 0x00040000, 0x10001040,
0x00000000, 0x10041040, 0x00040040, 0x10000040,
0x10040000, 0x10001000, 0x10001040, 0x00000000,
0x10041040, 0x00041000, 0x00041000, 0x00001040,
0x00001040, 0x00040040, 0x10000000, 0x10041000
};
public static void Encrypt_TDES(Byte[] pKey,
Byte[] pSource,
ref Byte[] pCypher)
{
Byte[] pKeyLeft = new Byte[8];
Byte[] pKeyRight = new Byte[8];
// 将16字节的key分成两部分
Array.Copy(pSource, 0, pCypher, 0, 8);
Array.Copy(pKey, 0, pKeyLeft, 0, 8);
Array.Copy(pKey, 8, pKeyRight, 0, 0);
Encrypt(pKeyLeft, pCypher);
Decrypt(pKeyRight, pCypher);
Encrypt(pKeyLeft, pCypher);
}
private static void Encrypt(Byte[] pKey,
Byte[] pData)
{
Deskey(pKey, Mode.ENCRYPT);
Des(pData, ref pData);
}
private static void Decrypt(Byte[] pKey,
Byte[] pData)
{
Deskey(pKey, Mode.DECRYPT);
Des(pData, ref pData);
}
private static void Des(Byte[] pIndata,
ref Byte[] pOutdata)
{
UInt32[] pWork = new UInt32[2];
pWork[0] = (UInt32)((pIndata[0] & 0xff) << 24);
pWork[0] |= (UInt32)((pIndata[1] & 0xff) << 16);
pWork[0] |= (UInt32)((pIndata[2] & 0xff) << 8);
pWork[0] |= (UInt32)((pIndata[3] & 0xff));
pWork[1] = (UInt32)((pIndata[4] & 0xff) << 24);
pWork[1] |= (UInt32)((pIndata[5] & 0xff) << 16);
pWork[1] |= (UInt32)((pIndata[6] & 0xff) << 8);
pWork[1] |= (UInt32)((pIndata[7] & 0xff));
desfunc(ref pWork, KnL);
pOutdata[0] = (Byte)((pWork[0] >> 24) & 0xff);
pOutdata[1] = (Byte)((pWork[0] >> 16) & 0xff);
pOutdata[2] = (Byte)((pWork[0] >> 8) & 0xff);
pOutdata[3] = (Byte)(pWork[0] & 0xff);
pOutdata[4] = (Byte)((pWork[1] >> 24) & 0xff);
pOutdata[5] = (Byte)((pWork[1] >> 16) & 0xff);
pOutdata[6] = (Byte)((pWork[1] >> 8) & 0xff);
pOutdata[7] = (Byte)(pWork[1] & 0xff);
}
private static void desfunc(ref UInt32[] pBlock,
UInt32[] pKeys)
{
UInt32 fval, work, right, leftt;
UInt32 round;
leftt = pBlock[0];
right = pBlock[1];
work = ((leftt >> 4) ^ right) & 0x0f0f0f0f;
right ^= work;
leftt ^= (work << 4);
work = ((leftt >> 16) ^ right) & 0x0000ffff;
right ^= work;
leftt ^= (work << 16);
work = ((right >> 2) ^ leftt) & 0x33333333;
leftt ^= work;
right ^= (work << 2);
work = ((right >> 8) ^ leftt) & 0x00ff00ff;
leftt ^= work;
right ^= (work << 8);
right = ((right << 1) | ((right >> 31) & 1)) & 0xffffffff;
work = (leftt ^ right) & 0xaaaaaaaa;
leftt ^= work;
right ^= work;
leftt = ((leftt << 1) | ((leftt >> 31) & 1)) & 0xffffffff;
Int32 pos = 0;
for (round = 0; round < 8; round++)
{
work = (right << 28) | (right >> 4);
work ^= pKeys[pos++];
fval = SP7[work & 0x3f];
fval |= SP5[(work >> 8) & 0x3f];
fval |= SP3[(work >> 16) & 0x3f];
fval |= SP1[(work >> 24) & 0x3f];
work = right ^ pKeys[pos++];
fval |= SP8[work & 0x3fL];
fval |= SP6[(work >> 8) & 0x3f];
fval |= SP4[(work >> 16) & 0x3f];
fval |= SP2[(work >> 24) & 0x3f];
leftt ^= fval;
work = (leftt << 28) | (leftt >> 4);
work ^= pKeys[pos++];
fval = SP7[work & 0x3fL];
fval |= SP5[(work >> 8) & 0x3f];
fval |= SP3[(work >> 16) & 0x3f];
fval |= SP1[(work >> 24) & 0x3f];
work = leftt ^ pKeys[pos++];
fval |= SP8[work & 0x3fL];
fval |= SP6[(work >> 8) & 0x3f];
fval |= SP4[(work >> 16) & 0x3f];
fval |= SP2[(work >> 24) & 0x3f];
right ^= fval;
}
right = (right << 31) | (right >> 1);
work = (leftt ^ right) & 0xaaaaaaaa;
leftt ^= work;
right ^= work;
leftt = (leftt << 31) | (leftt >> 1);
work = ((leftt >> 8) ^ right) & 0x00ff00ff;
right ^= work;
leftt ^= (work << 8);
work = ((leftt >> 2) ^ right) & 0x33333333;
right ^= work;
leftt ^= (work << 2);
work = ((right >> 16) ^ leftt) & 0x0000ffff;
leftt ^= work;
right ^= (work << 16);
work = ((right >> 4) ^ leftt) & 0x0f0f0f0f;
leftt ^= work;
right ^= (work << 4);
pBlock[0] = right;
pBlock[1] = leftt;
}
private static void Deskey(Byte[] key, Mode type)
{
Int32 i, j, l, m, n;
Byte[] pc1m = new Byte[64];
UInt32[] kn = new UInt32[64];
Byte[] pcr = new Byte[64];
for (j = 0; j < 56; j++)
{
l = pc1[j];
m = l & 07;
if (Convert.ToBoolean(key[l >> 3] & bytebit[m]))
{
pc1m[j] = 1;
}
else
{
pc1m[j] = 0;
}
}
for (i = 0; i < 16; i++)
{
if (type == Mode.DECRYPT)
{
m = (15 - i) << 1;
}
else
{
m = i << 1;
}
n = m + 1;
kn[m] = kn[n] = 0;
for (j = 0; j < 28; j++)
{
l = j + totrot[i];
if (l < 28)
{
pcr[j] = pc1m[l];
}
else
{
pcr[j] = pc1m[l - 28];
}
}
for (j = 28; j < 56; j++)
{
l = j + totrot[i];
if (l < 56)
{
pcr[j] = pc1m[l];
}
else
{
pcr[j] = pc1m[l - 28];
}
}
for (j = 0; j < 24; j++)
{
if (pcr[pc2[j]] != 0)
{
kn[m] |= bigbyte[j];
}
if (pcr[pc2[j + 24]] != 0)
{
kn[n] |= bigbyte[j];
}
}
}
Int32 row0 = 0;
Int32 row1 = 0;
Int32 start = 0;
for (i = 0; i < 16; i++, row1++)
{
row0 = row1++;
KnL[start] = (kn[row0] & 0x00fc0000) << 6;
KnL[start] |= (kn[row0] & 0x00000fc0) << 10;
KnL[start] |= (kn[row1] & 0x00fc0000) >> 10;
KnL[start++] |= (kn[row1] & 0x00000fc0) >> 6;
KnL[start] = (kn[row0] & 0x0003f000) << 12;
KnL[start] |= (kn[row0] & 0x0000003f) << 16;
KnL[start] |= (kn[row1] & 0x0003f000) >> 4;
KnL[start++] |= (kn[row1] & 0x0000003f);
}
}
}