NX-FWExtract

What is NX-FWExtract?

NX-FWExtract is semi-automated Nintendo Switch WLAN/BT firmware extractor.

You can use extracted result by embedding into Switch Linux kernel or put it in /lib/firmware/brcm on Switch Linux distribution ramdisk/rootfs

How to use

Requirements

You should have Node.JS and NPM on your system to run this tool.

Derieve keydb from sytem image

1. use tools/kezplez.py to derieve keys from system image dump (Note that you will need mmcblk1boot0.img and mmcblk1p3.img)

System title extraction

First, you have to extract 010000000000000b.nca and 0100000000000016.nca from your Nintendo Switch.

you should have Nintendo Switch KeyDB file. You can derieve those 'Illegal numbers' database using tools/kezplez.py

You can get this file by following this procedure:

1. Dump your Nintendo Switch's SYSTEM partition, which has partition number 10. (use gdisk to read this info)
2. Decrypt your dump from 1 using biskeydump payload and switch_decrypt
3. mount decrypted system image(it is vfat) and run nx-decrypt.sh on Contents directory. (make sure you modified its config before run it!)
4. Pick two files from nx-decrypt.sh output directory.

Firmware extraction

Second, You have to copy obtained file into this repository's nca directory.

and run this commands in seriese.

(before it, you may need to edit prepare.sh to reflect your system status)

npm i
./prepare.sh
node index.js

It will put its result in vendor folder in this repository. You can use this firmwares to make Linux WLAN/BT works more stable.

Special thanks

https://github.com/kiding/ for initial research of wlan system title.

License

You can use this project's code under GPL-3.0 license.