airtag-firmware-dump's Introduction

Airtag glitcher and dumper

Hardware prerequisites:

An airtag
A probe-rs compatible debug adapter such as a J-Link
A Raspberry Pi 3b+
An NFET

Other versions of Pi will also work, but you need to adjust the corresponding pins yourself.

Usage

1. Setting the hardware connection

Connect the following pins from the Raspberry Pi 3b+ to the airtag (`test point numbering):

Function	Raspberry Pi 3b+	Airtag
Glitch output	wiringPi 3	28 (using an NFET)
Trigger	wiringPi 2	34 (1.8V)
Power	wiringPi 0	VCC1 + VCC2

2. Start the glitcher

Copy the airtag-glitcher folder to your Raspberry Pi 3b+, enter it and execute the run.sh.

3. Start the dumper

Copy the airtag-dump folder to your computer where the SWD adapter connected and run Cargo run. Next, pray that your glitch will succeed :)

Credits

pd0wm for his original stm32-version dumper
LimitedResults for their original research into glitching the NRF52: https://limitedresults.com/2020/06/nrf52-debug-resurrection-approtect-bypass/
Colin O'Flynn for documenting the test points: https://github.com/colinoflynn/airtag-re
stacksmashing for his video explaining the procedure: https://www.youtube.com/watch?v=_E0PWQvW-14

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