Tuesday, April 5, 2016

Allow empty encryption password input - LG G4 H811 20i stock rom modification request

I need someone to take the H811 20i twrp flashable stock rom:

http://ift.tt/1QsMdwY

and I need them to modify it to:

1) Allow the input of an empty password at the boot encryption password request screen

2) Disable the lock screen entirely (As it will not accept an empty password, and is unlikely disabled or using the old password)

Why would I need something this insane you ask? Because I used vdc cryptfs to change my password however due to a syntax bug (not including the new password in the command) the password was set to empty. Now I cannot access my data. Should you wish to try this yourself you can read all about it here:

http://ift.tt/1WaTTGV

Not updated in this github thread is that this scenario was reproduced using CM13 on another device and indeed using a modified twrp the empty password was accepted and the partition decrypted. TWRP does not support native g4 encryption so that solution wouldn't work.

I realize this is not 100% going to work but it's the easiest solution i got so far. Extracting the encryption key with custom software, modifying twrp to work with g4 encryption, and/or loading an engineering boot image with a root shell and a modified vdc to allow me to reset the encryption password are all much less appealing solutions at this point.

Happy to donate to who ever is skilled enough and up for the challenge.

Cheers


via xda-developers http://ift.tt/205JYCz

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