desprocess.h

C++编写的DES加密算法

# if ! defined(AFX_DESPROCESS_H__6FD6DF17_CFC4_415A_B247_6209049569BA__INCLUDED_)
# define AFX_DESPROCESS_H__6FD6DF17_CFC4_415A_B247_6209049569BA__INCLUDED_

# if _MSC_VER > 1000
# pragma once
# endif // _MSC_VER > 1000

# define maxlen 60000
# include <iostream.h>
# include "string.h"
# include "malloc.h"
# include "stdio.h"

/* IP */
static int ip[64]={
	58,50,42,34,26,18,10,2,
	60,52,44,36,28,20,12,4,
	62,54,46,38,30,22,14,6,
	64,56,48,40,32,24,16,8,
	57,49,41,33,25,17,9,1,
	59,51,43,35,27,19,11,3,
	61,53,45,37,29,21,13,5,
	63,55,47,39,31,23,15,7};

/* IP-1 */
static int fp[64]={
	40,8,48,16,56,24,64,32,
	39,7,47,15,55,23,63,31,
	38,6,46,14,54,22,62,30,
	37,5,45,13,53,21,61,29,
	36,4,44,12,52,20,60,28,
	35,3,43,11,51,19,59,27,
	34,2,42,10,50,18,58,26,
	33,1,41,9,49,17,57,25};

/* E矩阵 */
static int e[48]={
	32,1,2,3,4,5,
	4,5,6,7,8,9,
	8,9,10,11,12,13,
	12,13,14,15,16,17,
	16,17,18,19,20,21,
	20,21,22,23,24,25,
	24,25,26,27,28,29,
	28,29,30,31,32,1
};
//S盒
static int sbox[8][64]={
	/* S1 */
	14,4,13,1,2,15,11,8,3,10,6,12,5,9,0,7,
	0,15,7,4,14,2,13,1,10,6,12,11,9,5,3,8,
	4,1,14,8,13,6,2,11,15,12,9,7,3,10,5,0,
	15,12,8,2,4,9,1,7,5,11,3,14,10,0,6,13,

	/* S2 */
	15,1,8,14,6,11,3,4,9,7,2,13,12,0,5,10,
	3,13,4,7,15,2,8,14,12,0,1,10,6,9,11,5,
	0,14,7,11,10,4,13,1,5,8,12,6,9,3,2,15,
	13,8,10,1,3,15,4,2,11,6,7,12,0,5,14,9,

	/* S3 */
	10,0,9,14,6,3,15,5,1,13,12,7,11,4,2,8,
	13,7,0,9,3,4,6,10,2,8,5,14,12,11,15,1,
	13,6,4,9,8,15,3,0,11,1,2,12,5,10,14,7,
	1,10,13,0,6,9,8,7,4,15,14,3,11,5,2,12,

	/* S4 */
	7,13,14,3,0,6,9,10,1,2,8,5,11,12,4,15,
	13,8,11,5,6,15,0,3,4,7,2,12,1,10,14,9,
	10,6,9,0,12,11,7,13,15,1,3,14,5,2,8,4,
	3,15,0,6,10,1,13,8,9,4,5,11,12,7,2,14,

	/* S5 */
	2,12,4,1,7,10,11,6,8,5,3,15,13,0,14,9,
	14,11,2,12,4,7,13,1,5,0,15,10,3,9,8,6,
	4,2,1,11,10,13,7,8,15,9,12,5,6,3,0,14,
	11,8,12,7,1,14,2,13,6,15,0,9,10,4,5,3,

	/* S6 */
	12,1,10,15,9,2,6,8,0,13,3,4,14,7,5,11,
	10,15,4,2,7,12,9,5,6,1,13,14,0,11,3,8,
	9,14,15,5,2,8,12,3,7,0,4,10,1,13,11,6,
	4,3,2,12,9,5,15,10,11,14,1,7,6,0,8,13,

	/* S7 */
	4,11,2,14,15,0,8,13,3,12,9,7,5,10,6,1,
	13,0,11,7,4,9,1,10,14,3,5,12,2,15,8,6,
	1,4,11,13,12,3,7,14,10,15,6,8,0,5,9,2,
	6,11,13,8,1,4,10,7,9,5,0,15,14,2,3,12,

	/* S8 */
	13,2,8,4,6,15,11,1,10,9,3,14,5,0,12,7,
	1,15,13,8,10,3,7,4,12,5,6,11,0,14,9,2,
	7,11,4,1,9,12,14,2,0,6,10,13,15,3,5,8,
	2,1,14,7,4,10,8,13,15,12,9,0,3,5,6,11
};
/* P */
static int p[32]={
	16,7,20,21,
	29,12,28,17,
	1,15,23,26,
	5,18,31,10,
	2,8,24,14,
	32,27,3,9,
	19,13,30,6,
	22,11,4,25
};
static int pc1[56]={
	57,49,41,33,25,17,9,
	1,58,50,42,34,26,18,
	10,2,59,51,43,35,27,
	19,11,3,60,52,44,36,
	63,55,47,39,31,23,15,
	7,62,54,46,38,30,22,
	14,6,61,53,45,37,29,
	21,13,5,28,20,12,4
};
/* PC-1 */
static int ls[16]={
	1,1,2,2,2,2,2,2,1,2,2,2,2,2,2,1};

/* PC-2 */
static int pc2[48]={
	14,17,11,24,1,5,
	3,28,15,6,21,10,
	23,19,12,4,26,8,
	16,7,27,20,13,2,
	41,52,31,37,47,55,
	30,40,51,45,33,48,
	44,49,39,56,34,53,
	46,42,50,36,29,32
};

struct bits {
	bool bit[64];
	int totalbit;
};
struct chars{
	char ch[8];
	int totalchar;
};
struct bitarray
{
	bits bitarr[16];
};
class DESProcess
{public:
	DESProcess();
	virtual ~DESProcess();

	chartobits (chars ch,bits *bts);
	bitstochar (bits bts,chars *ch);

	bitmaping (int bitmapno,bits inbts,bits *outbts);

	InitIP (bits bts64,bits *Lbts32,bits *Rbts32);
	FinalIP(bits Lbts32,bits Rbts32,bits *bts64);

	leftshift(bits *bit28,int times);
	pc1tran(bits bts64,bits *Cbts28,bits *Dbts28);
	pc2tran(bits Cbts28,bits Dbts28,bits *Kbts48);
	keygen(bits key,bitarray *subkey);

	etran(bits bts32,bits *bts48);
	bitToSBoxPos(bits bts48,int boxno,int *row,int *col);
	sboxtran(bits bts48,bits *bts32);
	ptran(bits bts32,bits *fout);
	ftran(bits inbts32,bits keyi,bits *fRes);

	exclusiveOR(bits btsl,bits bts2,bits *xorRes);
	desblock(chars intext8,chars key,bool encode,chars *outtext8);

	desCoding(char mfile[],char key[],char cfile[],bool codeedir);

	desEncode(char mfile[],char key[],char cfile[]);
	desDecode(char mfile[],char key[],char cfile[]);

	dispfile(char fn[]);
	float bitdiff(char mfile[],char cfile[],float *bitdiff8byte);
};

#endif //! defined(AFX_DESPROCESS_H__6FD6DF17_CFC4_415A_B247_6209049569BA__INCLUDED_)