How to log keyboard inputs in Keyboard Input Filter Driver (kbfiltr)

Question

0.00/5 (No votes)

See more:

I am trying to store all the keyboard inputs being monitored using the kbfiltr driver (given in the Windows Driver Kit). At present, I can only create a text file using the ZwCreateFile routine, inside the DriverEntry routine; but I cannot write any information to file inside the KbFilter_ServiceCallback function. Please help me as to how I can save the intercepted keyboard packets in the log file.

Posted 11-Nov-12 22:24pm

muneeb131

Add a Solution

1 solution

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

Dharmateja Challa · Answer 1 · 2012-11-23T20:02:00

I did it differently, but you can give it a try,

C++

KbFilter_IsrHook(
    PDEVICE_OBJECT         DeviceObject,               
    PKEYBOARD_INPUT_DATA   CurrentInput, 
    POUTPUT_PACKET         CurrentOutput,
    UCHAR                  StatusByte,
    PUCHAR                 DataByte,
    PBOOLEAN               ContinueProcessing,
    PKEYBOARD_SCAN_STATE   ScanState
    )

*DataByte gives you the actual intercepted keyboard value. You can create a buffer and add to it in a DPCforISR. Once in a while you can have IOCTL call from your application and write it to file.