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theholycow

keyboard driver editing ideas?

3 posts in this topic

So in this thread, I was trying to find a way to block special keys, etc for a screen lock, essentially. Everything we tried wouldn't work quite right. It came to me later that if I could just not recognize the keys at all, there would be no problem with blocking them. I located the keyboard drivers, and could do nothing with them. Below is what you get when you try to edit it in a text editor. I am sure it can be done, I just don't know how, any ideas? I just need the system to ignore all keys other than letters, numbers, space, and enter button. Ideally I would make it so that the script edits the driver when it runs, and then changes it back when the user has passed. The tricky part is editing it.

There are 4 files on my comp under the driver details for the keyboard:

C:\WINDOWS\system32\drivers\ PS2.sys, kbdclass.sys, i8042prt.sys, and arkbcfltr.sys

I don't know which one to mess with, but they all look similar:

CODE
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Clearly very useful to me.... Ideas?

(I also realize that this is an extremely complicated way of going about this, but I plan on using a similar technique on some projects in the future, so any starters on this whole driver business would be great-why not start with the keyboard?)


Christianity: In the beginning, there was God, who always was there and created everything.Atheism: In the beginning, there was nothing, which exploded. Both sides look bad...

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remove the *.sys file please, that is just foolish of you... Are you trying to remap your keyboard? Turning off specific keys? If so google "keyboard remapping", but know that if you do it wrong you can screw up the current keyboard setup.


 

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Madness is the first step to understanding...

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#3 ·  Posted (edited)

you can't "edit" binary code, well... you can but my best guess is if the system accepts the file you wont be able to type anymore :P

If you want to do something like that you need a debugger/disassembler like w32dasm, for drivers probably more a assembler debugger like Ollydbg

a good viewer for binaries with binary, hex and debug: biew

another downside: after your finished "debugging" you will probably have to recode your changes in ASM :( something I haven't done in over 10 years... ^^

(if you do want to f*k up your system then keep the file checksum intact else the executable wont run (MZ = executable file so its not just a lib) then just randomly make some changes and see what happens next time the file is loaded :idea:)

Edited by j00ls

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