PureBasic Forums - English

PureVALID library

What for ?

PureValid is a library with one function : PureValid_CheckFile(Key.s)

It is intended to check an EXE integrity at runtime, by calculating a fingerprint and comparing it to a validation info located at the end of the EXE.
This validation info is generated by PureValid.exe (included) or PureUPX.

How ?

1. In your application YourApp.pb, only add one line :

  PureValid_CheckFile("YourEncryptionKey")
   or
   Valid = PureValid_CheckFile("YourEncryptionKey")
   ; Valid = 1 if EXE is valid,
   ; 0 if EXE is corrupt (program stops)

2. Compile your application as usual

3. Validate your application with PureValid.exe :

   PureValid YourApp.exe "YourEncryptionKey"

4. It's done. Now if something / someone changes your application, it does not run anymore. Try to change it's name or patch it, and see the result.

Note (1): you can also use PureUPX to validate your application after compressing (+/- scrambling). If the PureValid library is installed, you will see an extra PureValid section when you start PureUPX.

Note (2): it's only an integrity check, without any anti-debugging tricks, so it's a very lame protection against hackers...


Download library:
Only available for Purebasic Windows x86
PB3.94 : http://gnozal.ucoz.com/PureValid.zip
PB4.00-4.10 : http://gnozal.ucoz.com/PureValid_.zip
PB4.20 : http://gnozal.ucoz.com/PureValid___.zip
PB4.3x : http://gnozal.ucoz.com/PureValid_430.zip
PB4.4x : http://gnozal.ucoz.com/PureValid_440.zip
PB4.5x : http://gnozal.ucoz.com/PureValid_450.zip
PB4.6x : http://gnozal.ucoz.com/PureValid_460.zip
PB5.0x : http://gnozal.ucoz.com/PureValid_500.zip

PureUPX :
http://gnozal.ucoz.com/PureUPX.zip
(see viewtopic.php?t=9030)

Other libs and tools at http://gnozal.ucoz.com/

Update

What's new : works with PB3.90

(see first post of thread)

Update

Changed dynamic array to static array to work with PB3.92

Cool, great addition to my lib arsenal

Thanks gnozal!

It would be nice if the help file was a .chm so that Pure Basic would link to it in the IDE...

griz wrote:It would be nice if the help file was a .chm so that Pure Basic would link to it in the IDE...

Well, yes, but the HTML help files work great with jaPBe !

Update

Changes :
- added threadsafe version [PB4]
- updated help file

Hi Gnozal,

if I'm use purevalid_check on me program is possible to check the integrity of the file (on the disk) or is possible to create a thread that check all "x second" if the loaded-file in memory integer?

sorry for me english, I hope you understand what I mean.

Thanks
jpd

jpd wrote:Hi Gnozal,
if I'm use purevalid_check on me program is possible to check the integrity of the file (on the disk) or is possible to create a thread that check all "x second" if the loaded-file in memory integer?
sorry for me english, I hope you understand what I mean.

PureVALID checks the EXE integrity (on the disk) by calculating a fingerprint and comparing it to a validation info located at the end of the EXE. It does not check the memory.
You can call the function PureValid_CheckFile() whenever you want.

Ok,

Thanks Gnozal,


and Thanks for all your nice libraries!

Best
jpd

I appreciate the 3.94 support, as I am still using it for most stuff

Update

(PB 4.2x version only)

Changes :
- recompiled with PB 4.20 final and latest tailbite

< EDIT JUN 6 2008 >

Hello,

It doesn't work on PB 4.30... missing string-extention.

Thank you for this lib.

http://gnozal.ucoz.com/PureValid_500.zip produces error 404...