deshead.h

实现des加密的功能,包括有des的基本代码,以及ecb、cbc两种加密功能!没有界面~

#ifndef DESHEAD_H_
#define DESHEAD_H_ 

//DES的初始置换IP表
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
};
//DES的IP逆置换表 
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
};

//DES加密过程的选为表E
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
};
// 32-bit permutation function P used on the output of the S-boxes 
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
};
// 置换选择表PC-1
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
};
//置换选择表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
};
//循环左移运算表
static int ls[16] = {
//1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16
	1,1,2,2,2,2,2,2,1, 2, 2, 2, 2, 2, 2,1
};

//S盒运算 
static int sbox[8][64] = {
//盒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,
//盒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,
//盒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,
//盒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,
//盒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,
//盒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,
//盒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,
//盒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
};
struct dats
{
	char dat[1024];
	int totalchar;
};
struct bits{
	bool bit[64];
	int totalbit;
};
struct chars{
	char ch[8];
	int totalchar;
};
struct bitarry {
	bits bitarr[16];
};

class des
{
private:
	char context[1024];
dats mingwen;
dats miwen;
dats yuanwen;
char temp8;
int modeflag;
chars key;
char bufer[1024];   //定义了一个1024个字符组来充当计算过程中的临时变量
char iv;
char miyao;
// Construction
public:

	
	void MIYAOERJINZHI();//just a test~
	jiami_ecb();//ecb加密程序
	jiami_cbc();//cbc加密程序
	jiemi_cbc();//cbc解密chengx
	jiemi_ecb();//ecb解密程序
	GetTxt();//读取明文数据
		chartobits(chars ch,bits *bts);
	bitstochar(bits bts,chars *ch);
	bitmaping(int bitmapno,bits inbits,bits *outbits);
	init_IP(bits bts64,bits *lbts32,bits *rbts32);
	finall_IP(bits lbts32,bits rbts32,bits *bts64);
	leftshift(bits *bit28,int times);
	PC1_tran(bits bts64,bits *cbts28,bits *dbts28);
	PC2_tran(bits cbts28,bits dbts28,bits *kbts48);
	keygen(bits key,bitarry *subkey);
	E_tran(bits bts32,bits*bts48);
	bitToSboxpos(bits bts48,int boxno,int *row,int *col);
	sbox_tran(bits bts48,bits *bts32);
	P_tran(bits bts32,bits *fout);
	F_tran(bits inbts32,bits keyi,bits *fres);
	exclusiveOR(bits bts1,bits bts2,bits *xorRes);
	desblock(chars intext8,chars key,bool encode,chars *outtext8);
	descoding(char mfile[],char key[],char cfile[],bool codedir);
	desecode(char mfile[],char key[],char cfile[]);
	desdcode(char mfile[],char key[],char cfile[]);
	

protected:
	
};

#endif