test.cpp

des加密

#include"des.h"

#include <stdio.h>
#include <time.h>
#include <stdlib.h>

#define PACKETLEN 8
#define RAND_MAX 0x7fff

int main()

{

unsigned char pt[1024];
unsigned char ct[1024];

//unsigned char key[1024]={'a','b','c','d','a','b','c','d'};
unsigned char key[1024];



	int i = 0;
	//int in_len = PACKETLEN;
	int in_len;
	int key_len;
	time_t t;                 //这两行保证每次产生的随机数不同
    srand( (unsigned) time( &t ) ); 


char *show = (char *)malloc(sizeof(char)*1024); 

	//pt[in_len] = '\0';

/*
	for(i=0;i<in_len;i++)
		pt[i] = 97+rand()*26/RAND_MAX;

	for(i=0;i<in_len;i++)
		key[i] = 97+rand()*26/RAND_MAX;
*/
printf("请输入需要加密的明文（16进制）\n");
int temp,len=1;
scanf("%x",&temp);
int binary[1024];
for(i=0;i<1024;i++){
	binary[i]=0;
}
for(i=0;temp!=0;i++){
	binary[i]=temp%2;
	temp=temp/2;
    
}

len=7;
	for(i=0;len>=0;i++,len--)
	{
		pt[i]=binary[len];

	}
	pt[i+1]='\0';in_len=i;getchar();
printf("请输入加密密钥\n");
    for(i=0;i<1025;i++)
	{
		scanf("%c",key+i);
		if(key[i] == '\n')
		{
			key[i]='\0';
		    key_len = i-1;
			break;
		}
	}


des_key skey;

pt[in_len+1]=ct[in_len+1]='\0';
des_setup((unsigned char*)key,key_len,0,&skey);printf("明文: ");
for(i=0;i<in_len;i++){
	printf("%d",pt[i]);
}


printf("请输入回车键进行加密\n");
scanf("%c",show);

des_ecb_encrypt(pt,ct,&skey);

printf("密文: %s\n",ct);

printf("请输入回车键进行解密\n");
scanf("%c",show);


des_ecb_decrypt(ct,pt,&skey);

for(i=0;i<in_len;i++){
	printf("%d",pt[i]);
}

 

system("PAUSE");

return 0;

}