/* * $Header: arccode.c,v 1.1 88/06/01 15:15:58 hyc Locked $ *//* * ARC - Archive utility - ARCCODE *  * Version 1.02, created on 01/20/86 at 13:33:35 *  * (C) COPYRIGHT 1985 by System Enhancement Associates; ALL RIGHTS RESERVED *  * By:  Thom Henderson *  * Description: This file contains the routines used to encrypt and decrypt data * in an archive.  The encryption method is nothing fancy, being just a * routine XOR, but it is used on the packed data, and uses a variable length * key.  The end result is something that is in theory crackable, but I'd * hate to try it.  It should be more than sufficient for casual use. *  * Language: Computer Innovations Optimizing C86 */#include <stdio.h>#include "arc.h"static char    *p;		/* password pointer */voidsetcode(){				/* get set for encoding/decoding */	p = password;		/* reset password pointer */}unsigned charcode(c)				/* encode some character */	char            c;	/* character to encode */{	if (p) {		/* if password is in use */		if (!*p)	/* if we reached the end */			p = password;	/* then wrap back to the start */		return c ^ *p++;/* very simple here */	} else		return c;	/* else no encryption */}