wjcdestest.cpp

DES算法加解密全套程序

// 3-Des test

#include "WjcDes.h"
#include "stdio.h"
#include "string.h"
#include "memory.h"
#include "iostream.h"

#include   <string.h>   
  #include   <stdio.h>   
#define N 100
#include <time.h> //测试时间头文件
void main()
{
double start,finish;//定义开始结束
start=(double)clock();//开始计时
		//read characters from the txt file;  
        FILE   *stream;   
       // char   string[]   =   "This   is   a   test";   
        char   msg[N];       
        /*   open   a   file   for   update   */   
      //  stream   =   fopen("DUMMY.FIL",   "w+");   
		stream   =   fopen("2.txt",   "r+");     
        /*   write   a   string   into   the   file   */   
       // fwrite(string,   strlen(string),   1,   stream);       
        /*   seek   to   the   start   of   the   file   */   
        fseek(stream,   0,   SEEK_SET);     
        /*   read   a   string   from   the   file   */   
        //fgets(msg,   strlen(string)+1,   stream); 
		fgets(msg,   N,   stream);    
        /*   display   the   string   */      
        //printf("%s",   msg);      
         
     




/*	char key[]={0,2,0,0,9,3,5,1,9,8,0,0,9,1,7},buf[255];
	char str[]="Welcome to My 3-DES Test! --WangJunchuan\n"
		       "Northeastern University (www.neu.edu.cn)\n"
			   "Email: [e-mail]";
*/
//	char str[]="xiaowei is the best in the world";
char key[]={0,2,0,0,9,3,5,1,9,8,0,0,9,1,7},buf[N];
	char str[N];
	for (int j=0;j<=N-1;j++)
	{
		str[j]=msg[j];
	}

	memset(buf, 0, sizeof(buf));
	strcpy(buf, str);
	puts("\nBefore encrypting");
	puts(buf);

//	Des_Go(buf, buf, sizeof(str), key, sizeof(key), ENCRYPT);
//	puts("\nAfter encrypting");
//	puts(buf);

	Des_Go(buf, buf, sizeof(str), key, sizeof(key), DECRYPT);
	puts("\nAfter decrypting");
	puts(buf);
	
	finish=(double)clock(); //结束时间
	printf("%.4fms",(finish-start));//输出时间 
	
	/*   open   a   file   for   update   */   
		stream   =   fopen("1.txt",   "w+");   
	
    
        /*   write   a   string   into   the   file   */   
      fwrite(buf,   strlen(buf),   1,   stream);   
    
        /*   seek   to   the   start   of   the   file   */   
        fseek(stream,   0,   SEEK_SET);   
    
        /*   read   a   string   from   the   file   */   
        fgets(msg,   strlen(buf)+1,   stream); 
        /*   display   the   string   */   
		
       printf("%s",   msg); 
	
	
	
	
	 fclose(stream); 
	getchar();

}