flat assembler - [HELP] - Import and execute DLL function

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ctl3d32

Joined: 30 Dec 2009
Posts: 206
Location: Brazil

ctl3d32 30 Oct 2010, 01:42

Hi folks!

I'm trying to import and execute some functions from a dll. This dll belongs to a program that does not run above win2k, but this dll is well documented.

These are the functions:

Code:

typedef void * tSr9000Hdl;
SR9000API tSr9000Hdl MSVC_STDCALL Sr9000HandleGet    ( void );
SR9000API void MSVC_STDCALL Sr9000HandleClose  ( const tSr9000Hdl hdl );

I wrote the following code to import and execute two functions, but can't make it work. Could someone please help me?

Code:

format PE GUI 4.0
entry start

include 'win32a.inc'

section '.text' code readable executable

  start:

        invoke  GetModuleHandle,0
        mov     [h_process],eax
        ;invoke  LoadLibrary,dll
        ;mov     [h_dll],eax
        ;invoke  GetProcAddress,[h_dll],func
        ;mov     [h_func],eax
        ;invoke  h_func
        invoke  Sr9000HandleGet
        invoke  Sr9000HandleClose,eax

  exit:
        invoke  ExitProcess,0

section '.data' data readable writeable

  dll db 'SR9000.DLL',0
  func  db 'Sr9000HandleGet',0

section '.bss' readable writeable

  h_process  dd ? ;handles to the executable process.
  ;h_dll      dd ?
  ;h_func     dd ?

section '.idata' import data readable writeable

  library kernel,'KERNEL32.DLL',\
          sr9000,'SR9000.DLL'

  import sr9000,\
         Sr9000HandleGet,'Sr9000HandleGet',\
         Sr9000HandleClose,'Sr9000HandleClose'

  import kernel,\
         GetModuleHandle,'GetModuleHandleA',\
         ExitProcess,'ExitProcess'
         ;GetProcAddress,'GetProcAddress',\
         ;LoadLibrary,'LoadLibraryA',\


  ;import user,\
        ; MessageBoxA,'MessageBoxA'

Attached you can get the .h file of the dll and the dll itself.

Thanks,
ctl3d32

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30 Oct 2010, 01:42

Yardman

Joined: 12 Apr 2005
Posts: 244
Location: US

Yardman 30 Oct 2010, 04:45

[ Post removed by author. ]

Last edited by Yardman on 04 Apr 2012, 03:54; edited 1 time in total

30 Oct 2010, 04:45

ctl3d32

Joined: 30 Dec 2009
Posts: 206
Location: Brazil

ctl3d32 30 Oct 2010, 10:29

Hi!

Thanks, but LoadLibrary was still returning 00000000 instead of the handle of the .DLL (it fails).

GetLastError was returning:

ERROR_DLL_INIT_FAILED 1114 (0x45A)
A dynamic link library (DLL) initialization routine failed.

I tried LoadLibraryEx with flag DONT_RESOLVE_DLL_REFERENCES. It WORKED, but there might be an incompatibility with Win7 and XP because a call inside the DLL is failing.

Just fot the record, what i wanted was to control a pc card made by Matec Instruments (http://www.matec.com/mindt/products/pc_cards/sr-9000/).

I'm giving up. Theres nothing else i can do to make it work.

Thanks a lot,
ctl3d32

30 Oct 2010, 10:29

revolution
When all else fails, read the source

Joined: 24 Aug 2004
Posts: 20631
Location: In your JS exploiting you and your system

revolution 30 Oct 2010, 11:57

Make sure the DLL is in the same folder as the exe file. Either that or put the DLL in the system folder.

LoadLibrary has a set method it uses to find the DLL, make sure the DLL is in one of those places that LoadLibrary looks.

30 Oct 2010, 11:57

ctl3d32

Joined: 30 Dec 2009
Posts: 206
Location: Brazil

ctl3d32 30 Oct 2010, 12:41

It's in the same folder as the .exe.

It's an old dll and an old program. Just for the record, it does not even run correctly under winXP. Sad

The university my brother works at bought this very expensive pc board, and they can't switch back to Win2k doe to compatibility issues with other software.

Thanks anyway,
ctl3d32

30 Oct 2010, 12:41

revolution
When all else fails, read the source

Joined: 24 Aug 2004
Posts: 20631
Location: In your JS exploiting you and your system

revolution 30 Oct 2010, 12:59

I doubt anyone else can test this for you unless they also have the same card.

30 Oct 2010, 12:59

pearlz

Joined: 07 Jun 2010
Posts: 55
Location: Viet Nam

pearlz 30 Oct 2010, 17:37

I tried rename of IOrange.dll it's return an error when i load library with sr9000.dll
this error <in messagebox>
This application has failed to start because IORange.dll was not found. Re-installing the application may fix this problem.

then i tried Loadlibrary with IOrange.dll i get an error

Code:

invoke  LoadLibrary,'IORANGE.DLL'
test  eax,eax
jnz   @f
  invoke MessageBox,0,'Error in LoadLibrary','Error',0
  jmp   exit
@@:

IORANGE.DLL is corrupted?

30 Oct 2010, 17:37

baldr

Joined: 19 Mar 2008
Posts: 1651

baldr 30 Oct 2010, 18:29

ctl3d32,

IORANGE.DLL seems to depend on some driver ("\\.\IORangeDevice0" or "VIORange.VXD").

30 Oct 2010, 18:29

pearlz

Joined: 07 Jun 2010
Posts: 55
Location: Viet Nam

pearlz 30 Oct 2010, 18:48

but i use Dev-C++ and i write

Code:

#include "windows.h"
int APIENTRY WinMain(HINSTANCE  hInstance,
                     HINSTANCE  hPrevInstance,
                     LPSTR    lpCmdLine,
                     int nCmdShow)
{
   HWND hLib=LoadLibraryEx("SR9000.DLL",NULL,1);
   TCHAR add[50]="";
   if (!hLib)
   {
     MessageBox(0,"Load Error","LoadLibrary",0);
     return 0;
   }else{
     MessageBox(0,"Load OK","LoadLibrary",0);
     HWND hFunc=GetProcAddress(hLib,"Sr9000HandleGet");
     wsprintf(add,"Address= %d",&hFunc);
     MessageBox(0,add,"LoadLibrary",0);
    /* if (hFunc)
       MessageBox(0,"Get OK","LoadLibrary",0);*/
     return 0;
   }      
    return 0;
}

it's work fine.
can you use C or c++ for your work?

Last edited by pearlz on 30 Oct 2010, 18:57; edited 1 time in total

30 Oct 2010, 18:48

ctl3d32

Joined: 30 Dec 2009
Posts: 206
Location: Brazil

ctl3d32 30 Oct 2010, 18:51

Thanks guys!

You all gave me an idea, and i think it worked. I copied the source code to the software's folder and it seemed to work ( when debugging it with olly). I will try more with it.

Thank you all very very much, this was letting me crazy.

I'm so stupid!!!!

Thumbs Up for all of you!

Cheers,
ctl3d32

30 Oct 2010, 18:51

pearlz

Joined: 07 Jun 2010
Posts: 55
Location: Viet Nam

pearlz 30 Oct 2010, 19:00

but hLib and hFunc have one value
it's equal.

30 Oct 2010, 19:00

pearlz

Joined: 07 Jun 2010
Posts: 55
Location: Viet Nam

pearlz 30 Oct 2010, 19:01

but wish you success.

30 Oct 2010, 19:01

pearlz

Joined: 07 Jun 2010
Posts: 55
Location: Viet Nam

pearlz 30 Oct 2010, 19:04

oh i'm sory

Code:

wsprintf(add,"Address= %d",&hFunc);
;change to
wsprintf(add,"Address= %d",hFunc);

but it work Very Happy

who stupid? Very Happy

30 Oct 2010, 19:04

pearlz

Joined: 07 Jun 2010
Posts: 55
Location: Viet Nam

pearlz 30 Oct 2010, 19:08

Baldr my idol, he so intelligent.

30 Oct 2010, 19:08

ctl3d32

Joined: 30 Dec 2009
Posts: 206
Location: Brazil

ctl3d32 30 Oct 2010, 21:21

Just for the record, it was missing "VIORange.VXD",since it was located at the installation folder. As soon as i copied my .ASM source to the installation folder, it worked flawlessly.

Thank you all!!!!!

30 Oct 2010, 21:21

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