////////////////////////////////////////////////////////////////////////////////

// md5test.cpp : Defines the entry point for the console application.
//

#include "windows.h"
#include "string.h"
#include "md5.h"
#include "stdio.h"
int main(int argc, char* argv[])
{

MD5_CTX md5;
MD5Init(&md5);                          //初始化用于md5加密的結構

unsigned char *encrypt;      //存放于加密的信息
unsigned char decrypt[17]; 
DWORD ensize;
/*
printf("輸入要加密字符:") ;      //存放加密后的結果
scanf("%s",encrypt);                  //輸入加密的字符
*/
if(argc!=2&&argc!=3&&argc!=4)
{
	printf("===========================================\n          MD5計算程序 v2.0\n           -by E17-\n===========================================\n\n");
	printf("Usage: md5 EncryptData.\n       md5 -f DataFile");
	return 0;
}
if(argc==3)
{
	if(strcmp(argv[1],"-f"))
	{
		printf("===========================================\n          MD5計算程序 v2.0\n           -by E17-\n===========================================\n\n");
		printf("Usage: md5 EncryptData.\n       md5 -f DataFile");
		return 0;
	}
	HANDLE hf=CreateFile(argv[2],GENERIC_READ,FILE_SHARE_READ,NULL,OPEN_EXISTING,FILE_ATTRIBUTE_NORMAL,NULL);
	if(hf==INVALID_HANDLE_VALUE)
	{
		printf("  -Can't open file.\n");
		return 0;
	}
	char *buf;
	DWORD size=GetFileSize(hf,NULL);
	buf=new char[size];
	DWORD ds;
	ReadFile(hf,buf,size,&ds,NULL);
	if(ds!=size)
	{
		CloseHandle(hf);
		printf("  -Something wrong when read file..\n");
		return 0;
	}

	CloseHandle(hf);
	ensize=size;
	encrypt=(unsigned char *)buf;
	
}
else
{
	encrypt=(unsigned char *)argv[1];
	ensize=strlen(argv[1]);
}
MD5Update(&md5,encrypt,ensize);    //對欲加密的字符進行加密
MD5Final(decrypt,&md5);                                             //獲得最終結果

printf("  +Lenght:  %d\n",ensize);
printf("  +MD5_32:  ");
for(int i=0;i<16;i++)
   printf("%02x",decrypt[i]);

printf("\n  +MD5_16:  ");
for(i=4;i<12;i++)
printf("%02x",decrypt[i]);


return 0;
}

/*   以上代碼在vc6下編譯通過，運行正常，能夠得到正確的md5值   */