MobileRead Forums - View Single Post - Source code for Secure Boot and Fastboot lockdown features

katadelos · 12-01-2021, 06:44 PM

I've been attempting to boot the Kindle X Migu firmware on a standard KT3 over the last couple of days and noticed something interesting about the GPL sources for that device - they include the missing headers and source code implementing the Secure Boot and Fastboot lockdown features on the hardened U-Boot builds found on recent Kindle devices.

There's nothing in there that stands out to me as immediately useful for jailbreaking purposes (the ability to unlock a production device seems to rely upon verifying a RSA-PSS message against the public key accessible using fastboot) but I've uploaded it to GitHub in case anyone wants to have a look: https://github.com/katadelos/ufbl-features-lab126

12-01-2021, 06:44 PM	#1
katadelos rm -rf / Posts: 219 Karma: 3333683 Join Date: Nov 2019 Location: United Kingdom Device: K5, KT, KT2, KT3, KT4, KV, PW2, PW3, PW4, PW5	Source code for Secure Boot and Fastboot lockdown features I've been attempting to boot the Kindle X Migu firmware on a standard KT3 over the last couple of days and noticed something interesting about the GPL sources for that device - they include the missing headers and source code implementing the Secure Boot and Fastboot lockdown features on the hardened U-Boot builds found on recent Kindle devices. There's nothing in there that stands out to me as immediately useful for jailbreaking purposes (the ability to unlock a production device seems to rely upon verifying a RSA-PSS message against the public key accessible using fastboot) but I've uploaded it to GitHub in case anyone wants to have a look: https://github.com/katadelos/ufbl-features-lab126