C语言实现DES加密解密算法源代码

#include "memory.h"
#include "stdio.h"
#include "stdlib.h"
enum  {encrypt,decrypt};//ENCRYPT:加密，DECRYPT：解密
void des_run(char out[8],char in[8],bool type=encrypt);
//设置密钥
void des_setkey(const char key[8]);
static void f_func(bool in[32],const bool ki[48]);//f函数
static void s_func(bool out[32],const bool in[48]);//s盒代替
//变换
static void transform(bool *out, bool *in, const char *table, int len);
static void xor(bool *ina, const bool *inb, int len);//异或
static void rotatel(bool *in, int len, int loop);//循环左移
 //字节组转换成位组
static void bytetobit(bool *out,const char *in, int bits);
//位组转换成字节组
static void bittobyte(char *out, const bool *in, int bits);
//置换IP表
const static char ip_table[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};
//逆置换IP-1表
const static char ipr_table[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 位选择表
static const char e_table[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};
//P换位表
const static char p_table[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};
//pc1选位表
const static char pc1_table[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
};
//pc2选位表
const static char pc2_table[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
};
//左移位数表
const static char loop_table[16]={1,1,2,2,2,2,2,2,1,2,2,2,2,2,2,1};
//S盒
const static char s_box[8][4][16]={
       //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,