Solved

Could you point a VFP obfuscator software ?

Posted on 2014-01-16
4
645 Views
Last Modified: 2014-01-18
Hi Experts!

Could you point a VFP obfuscator software with an acceptable quality?

Thanks in advance!
0
Comment
Question by:Eduardo Fuerte
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 2
4 Comments
 
LVL 42

Accepted Solution

by:
pcelba earned 250 total points
ID: 39786137
Unfortunately, I don't know one...

It is rather difficult to write good VFP obfuscator because the VFP language allows many ambiguities which are solved at run-time. Possible problems are:

1) You cannot recognize field from variable at design time
2) You cannot recognize object property from table field without context knowledge
3) You cannot obfuscate macro substitutions
4) You cannot generate scripts using variables (fields)

To implement some basic app names scrambling you must have the possibility to define variable and field names structure (and exception list) which will allow to recognize them by obfuscator.

What should be possible to change relatively easily is LOCAL and maybe PUBLIC variables. But is it sufficient?

So my hint: If the software is in China, Russia, Israel, etc. etc. then it is everywhere already... But you may create perfect software and deliver even more perfect upgrade periodically.

BTW, are your data safe enough? How do you protect them?
0
 
LVL 27

Assisted Solution

by:CaptainCyril
CaptainCyril earned 250 total points
ID: 39786794
What you can do is write a small piece of code to scan the PRGs and change variable names into something else that is not used elsewhere (fields, table alias, ...). That is helpful if you have long functions with complex functionality and the user won't be able to understand anything.

If that is not the case, I would suggest to find a wrapper for the exe using a dongle or any other protection.

SoftwarePassport
http://www.siliconrealms.com/
0
 
LVL 42

Expert Comment

by:pcelba
ID: 39787046
Yes, HW dongle is one possible way BUT you'll also need some EXE cryptor which will prevent decompilation and that's the main concern...

Related link: http://fox.wikis.com/wc.dll?Fox~DecompilingVFPExes
0
 

Author Closing Comment

by:Eduardo Fuerte
ID: 39790664
Thank you for the guidance!
0

Featured Post

Independent Software Vendors: We Want Your Opinion

We value your feedback.

Take our survey and automatically be enter to win anyone of the following:
Yeti Cooler, Amazon eGift Card, and Movie eGift Card!

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Microsoft Visual FoxPro (short VFP) is a programming language with it’s own IDE and database, ranking somewhat between Access and VB.NET + SQL Server (Express). Product Description: http://msdn.microsoft.com/en-us/vfoxpro/default.aspx (http://msd…
Recently I was talking with Tim Sharp, one of my colleagues from our Technical Account Manager team about MongoDB’s scalability. While doing some quick training with some of the Percona team, Tim brought something to my attention...
In an interesting question (https://www.experts-exchange.com/questions/29008360/) here at Experts Exchange, a member asked how to split a single image into multiple images. The primary usage for this is to place many photographs on a flatbed scanner…

739 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question