dosregi.c

dos环境下的利用硬盘序列号加密的程序

#include <stdio.h>
#include <stdlib.h>
#include <dos.h>
#include <conio.h>
#include <string.h>

char *getascii (unsigned int in_data [], int off_start, int off_end);

void main (void)
{
unsigned int dd [256]; /* DiskData */
unsigned int dd_off; /* DiskData offset */
char * sn;
char * test;
char ch;
FILE * fp;
int i;
int temp;
char key[]="TJFM5~SZGLQ^q6WP0.07";
if((fp=fopen("C:\TLQJFD.BIN","w+b"))==NULL){
	printf("cannot opent file\n");
	exit(1);
	}
while (inp (0x1F7) != 0x50)/* Wait for controller not busy */;

outp (0x1F6, 0xA0); /* Get first/second drive */

outp (0x1F7, 0xEC); /* Get drive info data */

while (inp (0x1F7) != 0x58) /* Wait for data ready */;

for (dd_off = 0; dd_off != 256; dd_off++) /* Read "sector" */
	dd [dd_off] = inpw (0x1F0);
sn=getascii(dd,10,19);
test=sn;
printf ("\nThe  Serial Number Hard Disk is %s",sn);

for(i=0;i<=1024;i++)
	putc(rand(),fp);
for(i=0;i<20;i++){
	temp=3*i*i-14*i+159;
	*sn=*sn^key[i];
	fseek(fp,temp,0);
	putc(*sn,fp);
	sn++;
	}
	printf ("\nTest Serial Number Hard Disk is ");

	for(i=0;i<20;i++){
	temp=3*i*i-14*i+159;
	fseek(fp,temp,0);
	ch=getc(fp);
	if(*test!=ch) {
		printf("\nfailure!");
		ch=0;
		break;
		}
	printf("%c",ch^key[i]);
	test++;
	}

	if(ch!=0) printf("\n\nCongraduate! Successfully register!");
fclose(fp);

}

char *getascii (unsigned int in_data [], int off_start, int off_end)
{
static char ret_val [255];
int loop, loop1;

for (loop = off_start, loop1 = 0; loop <= off_end; loop++)
{
ret_val [loop1++] = (char) (in_data [loop] / 256); /* Get High byte */
ret_val [loop1++] = (char) (in_data [loop] % 256); /* Get Low byte */
}
ret_val [loop1] = '\0'; /* Make sure it ends in a NULL character */
return (ret_val);
}