#include"fileC.h"
#define BUFFMAXSIZE 64

int fileC(char *datafilename,char *md5filename,int mode)
{
	BIO *df,*kf;
	int len,i;
unsigned char data[BUFFMAXSIZE],md5_result[16],tmp[16];


    if(mode==0)
	{
		df=BIO_new_file(datafilename,"r");
        kf=BIO_new_file(md5filename,"w");
	    
        while(1)
		{
            len=BIO_read(df,data,BUFFMAXSIZE);
              if(len==0||len==-1) break;

			 MD5(data, len, md5_result);
			 BIO_write(kf,md5_result,16);
			 

		}
		BIO_free(df);
		BIO_free(kf);
		return 0;
	}
	else
	{
		df=BIO_new_file(datafilename,"r");
        kf=BIO_new_file(md5filename,"r");
        while(1)
		{
		len=BIO_read(df,data,BUFFMAXSIZE);
		if(len==0||len==-1) break;
		BIO_read(kf,md5_result,16);
        MD5(data, len, tmp);
		for(i=0;i<16;i++)
		{
			if(tmp[i]!=md5_result[i]) {return -1;}
		}
		}
		BIO_free(df);
		BIO_free(kf);
		return 0;


 
	}
}