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Board index FiveWin for Harbour/xHarbour How easy it is to decompile (reverse eng) a xHarbour app ?
Posts: 838
Joined: Fri Feb 10, 2006 12:14 PM
How easy it is to decompile (reverse eng) a xHarbour app ?
Posted: Mon Jan 21, 2008 04:49 PM

Hi,

Does anyone knows how easy is to decompiled a xHarbour app.?

What are the main tools available for it ?

Regards
Antonio

Regards

Antonio H Ferreira
Posts: 44158
Joined: Thu Oct 06, 2005 05:47 PM
How easy it is to decompile (reverse eng) a xHarbour app ?
Posted: Mon Jan 21, 2008 09:06 PM

Antonio,

If you don't want your application to be ever decompiled, then you should compress it using a tool like UPX and using a password so it may not be decompressed (btw, UPX seems not to support passwords).

regards, saludos

Antonio Linares
www.fivetechsoft.com
Posts: 2706
Joined: Fri Oct 07, 2005 01:50 PM
How easy it is to decompile (reverse eng) a xHarbour app ?
Posted: Mon Jan 21, 2008 11:23 PM

To All

Absolutely use a compression tool to keep anyone from de-compiling your app .. the comression tool we use is ASPack.

http://www.aspack.com

Compression gets you very fast load times typically a 2 mg executable shrinks down to around 700k .. an indespensible tool in your inventory.

Rick Lipkin

Posts: 838
Joined: Fri Feb 10, 2006 12:14 PM
How easy it is to decompile (reverse eng) a xHarbour app ?
Posted: Tue Jan 22, 2008 10:14 AM

I'm trying Pecompact2 and it seems to be ok. Has password ecryption option.

Antonio

Regards

Antonio H Ferreira
Posts: 1195
Joined: Mon Oct 17, 2005 05:41 AM
How easy it is to decompile (reverse eng) a xHarbour app ?
Posted: Wed Jan 23, 2008 09:40 AM

Rick,

Are you using aspack with Vista. I have download the trial and after installing the program, the compression is working fine.
If I want to launch aspack again for compressing another program, I allways get an vista-error tha it can't be executed. After uninstalling and installing it again, it runs fine again, but only 1 time again.

Is this because it's the trial. I saw that the trial version was copyright 2002. Maybe it's an old version...

The compressed file keeps running fine :D

Regards,
Marc

Regards,

Marc



FWH32+xHarbour | FWH64+Harbour | BCC | DBF | ADO+MySQL | ADO+MariaDB | ADO+SQLite
Posts: 2706
Joined: Fri Oct 07, 2005 01:50 PM
How easy it is to decompile (reverse eng) a xHarbour app ?
Posted: Wed Jan 23, 2008 01:30 PM

MArk

Vista works just fine for me .. however we have a site license and it is registered. We have a .reg file that we apply to license our version .. may be the difference.

Rick

Posts: 1195
Joined: Mon Oct 17, 2005 05:41 AM
How easy it is to decompile (reverse eng) a xHarbour app ?
Posted: Wed Jan 23, 2008 02:39 PM

Rick,

The date of the exe in the trial is 15/1/2002 and the version is 2.12.
Maybe when you buy the software there is a newer version available...

Regards,
Marc

Regards,

Marc



FWH32+xHarbour | FWH64+Harbour | BCC | DBF | ADO+MySQL | ADO+MariaDB | ADO+SQLite
Posts: 2706
Joined: Fri Oct 07, 2005 01:50 PM
How easy it is to decompile (reverse eng) a xHarbour app ?
Posted: Thu Jan 24, 2008 01:46 AM

Mark

I have the same executable .. ver 2.12 dated 01/15/2002.

RIck Lipkin

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