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/*
* $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 */
void
setcode()
{ /* get set for encoding/decoding */
p = password; /* reset password pointer */
}
unsigned char
code(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 */
}
These are the contents of the former NiCE NeXT User Group NeXTSTEP/OpenStep software archive, currently hosted by Netfuture.ch.