des.cpp

用C++方式编写的DES算法,是一个不错的源代码哟,适和对C++有一定认识的人

work = (right << 28) | (right >> 4); 
work ^= *keys++; 
fval = SP7[work & 0x3fL]; 
fval |= SP5[(work >> 8) & 0x3fL]; 
fval |= SP3[(work >> 16) & 0x3fL]; 
fval |= SP1[(work >> 24) & 0x3fL]; 
work = right ^ *keys++; 
fval |= SP8[work & 0x3fL]; 
fval |= SP6[(work >> 8) & 0x3fL]; 
fval |= SP4[(work >> 16) & 0x3fL]; 
fval |= SP2[(work >> 24) & 0x3fL]; 
leftt ^= fval; 
work = (leftt << 28) | (leftt >> 4); 
work ^= *keys++; 
fval = SP7[work & 0x3fL]; 
fval |= SP5[(work >> 8) & 0x3fL]; 
fval |= SP3[(work >> 16) & 0x3fL]; 
fval |= SP1[(work >> 24) & 0x3fL]; 
work = leftt ^ *keys++; 
fval |= SP8[work & 0x3fL]; 
fval |= SP6[(work >> 8) & 0x3fL]; 
fval |= SP4[(work >> 16) & 0x3fL]; 
fval |= SP2[(work >> 24) & 0x3fL]; 
right ^= fval; 
} 
right = (right << 31) | (right >> 1); 
work = (leftt ^ right) & 0xaaaaaaaaL; 
leftt ^= work; 
right ^= work; 
leftt = (leftt << 31) | ( leftt >> 1); 
work = ((leftt >> 8) ^ right) & 0x00ff00ffL; 
right ^= work; 
leftt ^= (work << 8); 
work = ((leftt >> 2) ^ right) & 0x33333333L; 
right ^= work; 
leftt ^= (work << 2); 
work = ((right >> 16) ^ leftt) & 0x0000ffffL; 
leftt ^= work; 
right ^= (work << 16); 
work = ((right >> 4) ^ leftt) & 0x0f0f0f0fL; 
leftt ^= work; 
right ^= (work << 4); 
*block++ = right; 
*block = leftt; 
return; 
} 

// ----------------------------------------------------------------------- 
// Initial of static data members. These data will be used by all the 
// instances of class,and can not be changed. 
// ----------------------------------------------------------------------- 
unsigned char DES::Df_Key[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 }; 

unsigned short DES::bytebit[8] = { 
0200, 0100, 040, 020, 010, 04, 02, 01 }; 

unsigned long DES::bigbyte[24] = { 
0x800000L, 0x400000L, 0x200000L, 0x100000L, 
0x80000L, 0x40000L, 0x20000L, 0x10000L, 
0x8000L, 0x4000L, 0x2000L, 0x1000L, 
0x800L, 0x400L, 0x200L, 0x100L, 
0x80L, 0x40L, 0x20L, 0x10L, 
0x8L, 0x4L, 0x2L, 0x1L }; 

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 }; 

unsigned char DES::totrot[16] = { 
1, 2, 4, 6, 8, 10, 12, 14, 15, 17, 19, 21, 23, 25, 27, 28 }; 

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 }; 

unsigned long DES::SP1[64] = { 
0x01010400L, 0x00000000L, 0x00010000L, 0x01010404L, 
0x01010004L, 0x00010404L, 0x00000004L, 0x00010000L, 
0x00000400L, 0x01010400L, 0x01010404L, 0x00000400L, 
0x01000404L, 0x01010004L, 0x01000000L, 0x00000004L, 
0x00000404L, 0x01000400L, 0x01000400L, 0x00010400L, 
0x00010400L, 0x01010000L, 0x01010000L, 0x01000404L, 
0x00010004L, 0x01000004L, 0x01000004L, 0x00010004L, 
0x00000000L, 0x00000404L, 0x00010404L, 0x01000000L, 
0x00010000L, 0x01010404L, 0x00000004L, 0x01010000L, 
0x01010400L, 0x01000000L, 0x01000000L, 0x00000400L, 
0x01010004L, 0x00010000L, 0x00010400L, 0x01000004L, 
0x00000400L, 0x00000004L, 0x01000404L, 0x00010404L, 
0x01010404L, 0x00010004L, 0x01010000L, 0x01000404L, 
0x01000004L, 0x00000404L, 0x00010404L, 0x01010400L, 
0x00000404L, 0x01000400L, 0x01000400L, 0x00000000L, 
0x00010004L, 0x00010400L, 0x00000000L, 0x01010004L }; 

unsigned long DES::SP2[64] = { 
0x80108020L, 0x80008000L, 0x00008000L, 0x00108020L, 
0x00100000L, 0x00000020L, 0x80100020L, 0x80008020L, 
0x80000020L, 0x80108020L, 0x80108000L, 0x80000000L, 
0x80008000L, 0x00100000L, 0x00000020L, 0x80100020L, 
0x00108000L, 0x00100020L, 0x80008020L, 0x00000000L, 
0x80000000L, 0x00008000L, 0x00108020L, 0x80100000L, 
0x00100020L, 0x80000020L, 0x00000000L, 0x00108000L, 
0x00008020L, 0x80108000L, 0x80100000L, 0x00008020L, 
0x00000000L, 0x00108020L, 0x80100020L, 0x00100000L, 
0x80008020L, 0x80100000L, 0x80108000L, 0x00008000L, 
0x80100000L, 0x80008000L, 0x00000020L, 0x80108020L, 
0x00108020L, 0x00000020L, 0x00008000L, 0x80000000L, 
0x00008020L, 0x80108000L, 0x00100000L, 0x80000020L, 
0x00100020L, 0x80008020L, 0x80000020L, 0x00100020L, 
0x00108000L, 0x00000000L, 0x80008000L, 0x00008020L, 
0x80000000L, 0x80100020L, 0x80108020L, 0x00108000L }; 

unsigned long DES::SP3[64] = { 
0x00000208L, 0x08020200L, 0x00000000L, 0x08020008L, 
0x08000200L, 0x00000000L, 0x00020208L, 0x08000200L, 
0x00020008L, 0x08000008L, 0x08000008L, 0x00020000L, 
0x08020208L, 0x00020008L, 0x08020000L, 0x00000208L, 
0x08000000L, 0x00000008L, 0x08020200L, 0x00000200L, 
0x00020200L, 0x08020000L, 0x08020008L, 0x00020208L, 
0x08000208L, 0x00020200L, 0x00020000L, 0x08000208L, 
0x00000008L, 0x08020208L, 0x00000200L, 0x08000000L, 
0x08020200L, 0x08000000L, 0x00020008L, 0x00000208L, 
0x00020000L, 0x08020200L, 0x08000200L, 0x00000000L, 
0x00000200L, 0x00020008L, 0x08020208L, 0x08000200L, 
0x08000008L, 0x00000200L, 0x00000000L, 0x08020008L, 
0x08000208L, 0x00020000L, 0x08000000L, 0x08020208L, 
0x00000008L, 0x00020208L, 0x00020200L, 0x08000008L, 
0x08020000L, 0x08000208L, 0x00000208L, 0x08020000L, 
0x00020208L, 0x00000008L, 0x08020008L, 0x00020200L }; 

unsigned long DES::SP4[64] = { 
0x00802001L, 0x00002081L, 0x00002081L, 0x00000080L, 
0x00802080L, 0x00800081L, 0x00800001L, 0x00002001L, 
0x00000000L, 0x00802000L, 0x00802000L, 0x00802081L, 
0x00000081L, 0x00000000L, 0x00800080L, 0x00800001L, 
0x00000001L, 0x00002000L, 0x00800000L, 0x00802001L, 
0x00000080L, 0x00800000L, 0x00002001L, 0x00002080L, 
0x00800081L, 0x00000001L, 0x00002080L, 0x00800080L, 
0x00002000L, 0x00802080L, 0x00802081L, 0x00000081L, 
0x00800080L, 0x00800001L, 0x00802000L, 0x00802081L, 
0x00000081L, 0x00000000L, 0x00000000L, 0x00802000L, 
0x00002080L, 0x00800080L, 0x00800081L, 0x00000001L, 
0x00802001L, 0x00002081L, 0x00002081L, 0x00000080L, 
0x00802081L, 0x00000081L, 0x00000001L, 0x00002000L, 
0x00800001L, 0x00002001L, 0x00802080L, 0x00800081L, 
0x00002001L, 0x00002080L, 0x00800000L, 0x00802001L, 
0x00000080L, 0x00800000L, 0x00002000L, 0x00802080L }; 

unsigned long DES::SP5[64] = { 
0x00000100L, 0x02080100L, 0x02080000L, 0x42000100L, 
0x00080000L, 0x00000100L, 0x40000000L, 0x02080000L, 
0x40080100L, 0x00080000L, 0x02000100L, 0x40080100L, 
0x42000100L, 0x42080000L, 0x00080100L, 0x40000000L, 
0x02000000L, 0x40080000L, 0x40080000L, 0x00000000L, 
0x40000100L, 0x42080100L, 0x42080100L, 0x02000100L, 
0x42080000L, 0x40000100L, 0x00000000L, 0x42000000L, 
0x02080100L, 0x02000000L, 0x42000000L, 0x00080100L, 
0x00080000L, 0x42000100L, 0x00000100L, 0x02000000L, 
0x40000000L, 0x02080000L, 0x42000100L, 0x40080100L, 
0x02000100L, 0x40000000L, 0x42080000L, 0x02080100L, 
0x40080100L, 0x00000100L, 0x02000000L, 0x42080000L, 
0x42080100L, 0x00080100L, 0x42000000L, 0x42080100L, 
0x02080000L, 0x00000000L, 0x40080000L, 0x42000000L, 
0x00080100L, 0x02000100L, 0x40000100L, 0x00080000L, 
0x00000000L, 0x40080000L, 0x02080100L, 0x40000100L }; 

unsigned long DES::SP6[64] = { 
0x20000010L, 0x20400000L, 0x00004000L, 0x20404010L, 
0x20400000L, 0x00000010L, 0x20404010L, 0x00400000L, 
0x20004000L, 0x00404010L, 0x00400000L, 0x20000010L, 
0x00400010L, 0x20004000L, 0x20000000L, 0x00004010L, 
0x00000000L, 0x00400010L, 0x20004010L, 0x00004000L, 
0x00404000L, 0x20004010L, 0x00000010L, 0x20400010L, 
0x20400010L, 0x00000000L, 0x00404010L, 0x20404000L, 
0x00004010L, 0x00404000L, 0x20404000L, 0x20000000L, 
0x20004000L, 0x00000010L, 0x20400010L, 0x00404000L, 
0x20404010L, 0x00400000L, 0x00004010L, 0x20000010L, 
0x00400000L, 0x20004000L, 0x20000000L, 0x00004010L, 
0x20000010L, 0x20404010L, 0x00404000L, 0x20400000L, 
0x00404010L, 0x20404000L, 0x00000000L, 0x20400010L, 
0x00000010L, 0x00004000L, 0x20400000L, 0x00404010L, 
0x00004000L, 0x00400010L, 0x20004010L, 0x00000000L, 
0x20404000L, 0x20000000L, 0x00400010L, 0x20004010L }; 

unsigned long DES::SP7[64] = { 
0x00200000L, 0x04200002L, 0x04000802L, 0x00000000L, 
0x00000800L, 0x04000802L, 0x00200802L, 0x04200800L, 
0x04200802L, 0x00200000L, 0x00000000L, 0x04000002L, 
0x00000002L, 0x04000000L, 0x04200002L, 0x00000802L, 
0x04000800L, 0x00200802L, 0x00200002L, 0x04000800L, 
0x04000002L, 0x04200000L, 0x04200800L, 0x00200002L, 
0x04200000L, 0x00000800L, 0x00000802L, 0x04200802L, 
0x00200800L, 0x00000002L, 0x04000000L, 0x00200800L, 
0x04000000L, 0x00200800L, 0x00200000L, 0x04000802L, 
0x04000802L, 0x04200002L, 0x04200002L, 0x00000002L, 
0x00200002L, 0x04000000L, 0x04000800L, 0x00200000L, 
0x04200800L, 0x00000802L, 0x00200802L, 0x04200800L, 
0x00000802L, 0x04000002L, 0x04200802L, 0x04200000L, 
0x00200800L, 0x00000000L, 0x00000002L, 0x04200802L, 
0x00000000L, 0x00200802L, 0x04200000L, 0x00000800L, 
0x04000002L, 0x04000800L, 0x00000800L, 0x00200002L }; 

unsigned long DES::SP8[64] = { 
0x10001040L, 0x00001000L, 0x00040000L, 0x10041040L, 
0x10000000L, 0x10001040L, 0x00000040L, 0x10000000L, 
0x00040040L, 0x10040000L, 0x10041040L, 0x00041000L, 
0x10041000L, 0x00041040L, 0x00001000L, 0x00000040L, 
0x10040000L, 0x10000040L, 0x10001000L, 0x00001040L, 
0x00041000L, 0x00040040L, 0x10040040L, 0x10041000L, 
0x00001040L, 0x00000000L, 0x00000000L, 0x10040040L, 
0x10000040L, 0x10001000L, 0x00041040L, 0x00040000L, 
0x00041040L, 0x00040000L, 0x10041000L, 0x00001000L, 
0x00000040L, 0x10040040L, 0x00001000L, 0x00041040L, 
0x10001000L, 0x00000040L, 0x10000040L, 0x10040000L, 
0x10040040L, 0x10000000L, 0x00040000L, 0x10001040L, 
0x00000000L, 0x10041040L, 0x00040040L, 0x10000040L, 
0x10040000L, 0x10001000L, 0x10001040L, 0x00000000L, 
0x10041040L, 0x00041000L, 0x00041000L, 0x00001040L, 
0x00001040L, 0x00040040L, 0x10000000L, 0x10041000L };