bamboozle.c

一个通讯程序源码

/*+-------------------------------------------------------------------------
	bamboozle.c - ecu/ecuungetty protection scheme
	[e-mail]
--------------------------------------------------------------------------*/
/*+:EDITS:*/
/*:09-10-1992-13:58-wht@n4hgf-ECU release 3.20 */
/*:08-22-1992-15:38-wht@n4hgf-ECU release 3.20 BETA */
/*:07-25-1991-12:55-wht@n4hgf-ECU release 3.10 */
/*:01-09-1991-22:31-wht@n4hgf-ISC port */
/*:01-09-1991-21:05-wht@n4hgf-no prototype for crypt if not __STDC__ */
/*:08-14-1990-20:39-wht@n4hgf-ecu3.00-flush old edit history */

#if __STDC__
char *crypt(char *,char *);
#else
char *crypt();
#endif


/*+-------------------------------------------------------------------------
	bamboozle(pid) - build encrypted string based on 'pid'

If crypt not used, do something pretty basic  (probably enough)
If you are paranoid, don't use _ANY_ of these algorithms exactly
--------------------------------------------------------------------------*/
char *
bamboozle(pid)
int pid;
{
#if defined(CRYPT)
char pidstr[16];
char *cptr;

	sprintf(pidstr,"z%08d",pid);
	pidstr[0] = 'G';	/* fool strings searchers */
	cptr = crypt(pidstr,"ba");
	return(cptr);
#else				/* probably enough */
static char pidstr[16];
	sprintf(pidstr,"b%09da",(int)(((long)pid * 4) / 5));
	return(pidstr);
#endif

#ifdef VARIANT_1	/* very paranoid */
char pidstr[16];
char *cptr;
	sprintf(pidstr,"z%08d",pid);
	pidstr[0] = 0xFF;	/* fool strings searchers */
	cptr = crypt(pidstr,pidstr);
	return(cptr);
#endif
#ifdef VARIANT_2	/* not paranoid at all */
char pidstr[16];
	sprintf(pidstr,"z%08d",pid - 2);
#endif
#ifdef VARIANT_3	/* invite trouble :-) */
	return("I_am_easy");
#endif

}	/* end of bamboozle */


/* vi: set tabstop=4 shiftwidth=4: */
/* end of bamboozle.c */