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RoganDawes / LOGITacker

Enumerate and test Logitech wireless input devices for vulnerabilities with a nRF52840 radio dongle.
GNU General Public License v3.0
657 stars 117 forks source link

feature request: save a bit of keystrokes per device #53

Open PlasmaHH opened 4 years ago

PlasmaHH commented 4 years ago

Hey, another thought that might improve things in a noisy environment, maybe its worth implementing. I have honestly no idea for the different supported hardware how much memory is available but might be worth thinking about it.

The idea is to have a ringbuffer of a couple of bytes/keystrokes/mouse movements associated with each device (especially for there being a few unencrypted around here still), maybe configurable at compile/run time? When listing the devices this could then display those, which is a bit nicer in display than the single keycodes in the logs as well as a bit better for many devices than passing it through to the host.

RoganDawes commented 4 years ago

Sorry, I'm not sure if I follow what you are suggesting. Can you explain in more detail, please?

lkarlslund commented 4 years ago

I think the suggestion is to buffer a few incoming keystrokes at a time, so you display them after a timeout. So instead of getting many many single keypress logs, you get a concatenated string of keys, when user is idle for some timeout value in milliseconds.

RoganDawes commented 4 years ago

Hmm, interesting idea. Keep a buffer of say 8 keystrokes for each observed device, start filling it up, and log the time it was added. If another keystroke comes in, add it to the buffer, and update the time. A timer task periodically checks each per-device buffer timestamp, and if it is more than X period old, prints and clears the buffer. If the buffer gets filled, print and clear immediately. Probably not too hard to implement, but may require more memory than is available.