/* $Id: crypt.c,v 1.1.1.1 2006/03/17 19:54:55 zicodxx Exp $ */
/*
THE COMPUTER CODE CONTAINED HEREIN IS THE SOLE PROPERTY OF PARALLAX
SOFTWARE CORPORATION ("PARALLAX").  PARALLAX, IN DISTRIBUTING THE CODE TO
END-USERS, AND SUBJECT TO ALL OF THE TERMS AND CONDITIONS HEREIN, GRANTS A
ROYALTY-FREE, PERPETUAL LICENSE TO SUCH END-USERS FOR USE BY SUCH END-USERS
IN USING, DISPLAYING,  AND CREATING DERIVATIVE WORKS THEREOF, SO LONG AS
SUCH USE, DISPLAY OR CREATION IS FOR NON-COMMERCIAL, ROYALTY OR REVENUE
FREE PURPOSES.  IN NO EVENT SHALL THE END-USER USE THE COMPUTER CODE
CONTAINED HEREIN FOR REVENUE-BEARING PURPOSES.  THE END-USER UNDERSTANDS
AND AGREES TO THE TERMS HEREIN AND ACCEPTS THE SAME BY USE OF THIS FILE.
COPYRIGHT 1993-1999 PARALLAX SOFTWARE CORPORATION.  ALL RIGHTS RESERVED.
*/

/*
 *
 * Encryption function for the cheat codes
 *
 */

#ifdef HAVE_CONFIG_H
#include <conf.h>
#endif

#ifdef RCS
char crypt_rcsid[] = "$Id: crypt.c,v 1.1.1.1 2006/03/17 19:54:55 zicodxx Exp $";
#endif

//#include <time.h>
//#include <stdlib.h>
#include <string.h>

//#include "inferno.h"

char *jcrypt (char *plainstring)
{
	int i, t, len;
	static char cryptstring[20];

	len=strlen (plainstring);
	if (len > 8)
		len = 8;

	for (i = 0; i < len; i++)
	{
		cryptstring[i] = 0;

		for (t = 0; t < 8; t++)
		{
			cryptstring[i] ^= (plainstring[t] ^ plainstring[i % (t + 1)]);
			cryptstring[i] %= 90;
			cryptstring[i] += 33;
		}
	}
	cryptstring[i] = 0;
	return ((char *)cryptstring);
}