des_call.cpp

本程序是一个在Linux FC5环境下写的经典加密程序playfair加密程序。也可以在其他环境中运行。只有文本界面

#include <iostream>
//#include "conio.h"
#include <fstream>
#include <windows.h>
using namespace std;
const int Sz=1000;
typedef void(*Des_Fun)(char*,char*,long,const char*,int,bool);
int main(void)
{
	HINSTANCE Des_Dll;
	Des_Fun Process;
	Des_Dll = LoadLibrary("des.dll");
	int cho=0;
	if(Des_Dll)
	{
		Process=(Des_Fun)GetProcAddress(Des_Dll, "des");
		if(Process)
		{
			bool chc;
			char key[64];
			char str[Sz];
			char buf[Sz];    
			ifstream in,in_k("key.ini");
			ofstream out;
			in_k>>key;
			cout<<"请输入操作：\n\t\t1:加密\t2:解密"<<endl;
			cin>>chc;
			//clrscr();
			if(chc==1)
			{
				cho=1;
				in.open("明文.txt",ios::binary);
				out.open("密文.txt",ios::binary);}
			else
			{
				cho=0;
				in.open("密文.txt",ios::binary);
				out.open("明文.txt",ios::binary);}
    while(in.getline(str,Sz,'\n'))
	{
		strcpy(buf, str);
		Process(buf, buf, sizeof(str), key, sizeof(key), chc);
		out<<buf<<"\n";
		*str='\0';
    }
    in.close();
    out.close();
    FreeLibrary(Des_Dll);
   }
	if(cho==1)
		cout<<"加密成功!"<<endl;
	else
		cout<<"解密成功!"<<endl;
	} 
	else cout<<"加载DLL文件失败!"<<endl;
	return 0;
}