[DES] 可能有用的几个加密解密函数，先放着，调查完再来看
和 flex里面的as里面函数用的数据结构差不多，先放着，再慢慢比较。
这个算法是参考一个DELHI的加密库所使用的算法用C实现的.
使用CBC模式对文件实行加密,速度大概是16M/SEC .这是我所见最快的,请问谁还有更快的算法?不考虑空间问题,但求速度.
不论何种语言.
//DES函数
void SingledesFunc(unsigned int *Data,unsigned int *Key)
{
unsigned int L,R,X,Y,i;
L = Data[0];
R = Data[1];
_asm{
mov eax,[L]
BSWAP eax
mov [L],eax
mov eax,[R]
BSWAP eax
mov [R],eax
}
///SwapInteger(L);
//SwapInteger(R);
X = (L > > 4 ^ R) & 0x0F0F0F0F; R = R ^ X; L = L ^ X < < 4;
X = (L > > 16 ^ R) & 0x0000FFFF; R = R ^ X; L = L ^ X < < 16;
X = (R > > 2 ^ L) & 0x33333333; L = L ^ X; R = R ^ X < < 2;
X = (R > > 8 ^ L) & 0x00FF00FF; L = L ^ X; R = R ^ X < < 8;
R = R < < 1 | R > > 31;
X = (L ^ R) & 0xAAAAAAAA;
R = R ^ X;
L = L ^ X;
L = L < < 1 | L > > 31;
for(i= 0;i <8;i++)
{
X = (R < < 28 | R > > 4) ^ (*Key);
Key++;
Y = R ^ (*Key);
Key ++;
L = L ^ (DES_Data[0][ X & 0x3F] | DES_Data[1][ X > > 8 & 0x3F] |
DES_Data[2][ X > > 16 & 0x3F] | DES_Data[3][ X > > 24 & 0x3F] |
DES_Data[4][ Y & 0x3F] | DES_Data[5][ Y > > 8 & 0x3F] |
DES_Data[6][ Y > > 16 & 0x3F] | DES_Data[7][ Y > > 24 & 0x3F]);
X = (L < < 28 | L > > 4) ^ (*Key);
Key++;
Y = L ^ (*Key);
Key++;
R = R ^ (DES_Data[0][ X & 0x3F] | DES_Data[1][ X > > 8 & 0x3F] |
DES_Data[2][ X > > 16 & 0x3F] | DES_Data[3][ X > > 24 & 0x3F] |
DES_Data[4][ Y & 0x3F] | DES_Data[5][ Y > > 8 & 0x3F] |
DES_Data[6][ Y > > 16 & 0x3F] | DES_Data[7][ Y > > 24 & 0x3F]);
}
R = R < < 31 | R > > 1;
X = (L ^ R) & 0xAAAAAAAA;
R = R ^ X;
L = L ^ X;
L = L < < 31 | L > > 1;
X = (L > > 8 ^ R) & 0x00FF00FF; R = R ^ X; L = L ^ X < < 8;
X = (L > > 2 ^ R) & 0x33333333; R = R ^ X; L = L ^ X < < 2;
X = (R > > 16 ^ L) & 0x0000FFFF; L = L ^ X; R = R ^ X < < 16;
X = (R > > 4 ^ L) & 0x0F0F0F0F; L = L ^ X; R = R ^ X < < 4;
_asm{
mov eax,[L]
BSWAP eax
mov [L],eax
mov eax,[R]
BSWAP eax
mov [R],eax
}
Data[0] = R;
Data[1] = L;
}
void desMakeKey(char *Data,unsigned int * Key ,int Reverse)
{
unsigned int I,J,L,M,N;
unsigned char PC_M[56], PC_R[56];
unsigned int K[32];
memset(K, 0,sizeof(K));
for(I=0; I <56;I++)
{
if ((Data[DES_PC1[I] > > 3] & (0x80 > > (DES_PC1[I] & 0x07)) )!= 0)
PC_M[I] = 1;
else
PC_M[I] = 0;
}
for(I=0;I <16;I++)
{
if(Reverse )
M = (15 - I) < < 1;
else
M = I < < 1;
N = M + 1;
for(J=0;J <28;J++)
{
L = J + ROT[I];
if (L < 28)
PC_R[J] = PC_M[L];
else
PC_R[J] = PC_M[L - 28];
}
for(J=28;J <56;J++)
{
L = J + ROT[I];
if (L < 56)
PC_R[J] = PC_M[L];
else
PC_R[J] = PC_M[L - 28];
}
L = 0x1000000;
for(J=0;J <24;J++)
{
L = L > > 1;
if(PC_R[DES_PC2[J ]] != 0)
K[M] = K[M] | L;
if(PC_R[DES_PC2[J + 24]] != 0)
K[N] = K[N] | L;
}
}
for(I=0;I <16;I++)
{
M = I < < 1;
N = M + 1;
(*Key) = K[M] & 0x00FC0000 < < 6 |
K[M] & 0x00000FC0 < < 10 |
K[N] & 0x00FC0000 > > 10 |
K[N] & 0x00000FC0 > > 6;
Key++;
(*Key) = K[M] & 0x0003F000 < < 12 |
K[M] & 0x0000003F < < 16 |
K[N] & 0x0003F000 > > 4 |
K[N] & 0x0000003F;
Key++;
}
}
//缩小选择换位表
const static unsigned char DES_PC1[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
};
//单纯置换规则
const static unsigned char DES_PC2[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
};
//循环表
const static unsigned char ROT[16] =
{1,2,4,6,8,10,12,14,15,17,19,21,23,25,27,28};
//用于DES运算的数据.
const static unsigned int DES_Data[8][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},
{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},
{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},
{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},
{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},
{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},
{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},
{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}};