I could have released the generator utility, but, hell, this will let people unlock any other laptop with same kind of BIOS, so no.Īs a bonus I had also unlocked hidden settings, which gave me a great control over my CPU and chipset. UEFITool 0.28.0 is a great tool for testing firmware images like bios region and ME regions. Interestingly, HP has a "backdoor" feature that lets you generate a password from code displayed, so I easily unlocked my laptop without any patches. Ex: Full backup: fpt -d spifull.bin Bios region dump: fpt -bios -bios -d biosregbak.bin Bios region write: fpt -bios -f biosregmod. The password checking was easy to find because AMI BIOS sources are available on GitHub. The Intel FPT tool can write this region, the correct tool for your ME FW version. The checking part was in the same module as BIOS flasher (IIRC). I was focused on doing same bios version and extracting the image from the factory firmware. I managed to make the replacement successfully. Extract the region from theirs, replace it in yours with UEFITool. Luckly for me, HP didn't used the BIOS Guard/Boot Guard technology and did the checking on the PEI stage with their own module. From the stock target BIOS, Main padding between volumes in BIOS region, extract As-Is and replace As-Is Here I have problems with the BIOS region, new2.rom is the BIOS file modified by me and dump.bin is that of davidm71 (see the attached image). However, my laptop will reset the BIOS if it fails the signature checking. My HP got a password after a faulty BIOS update (it just hanged up for 30 minutes on one block and I pulled the battery, never do this!) I would like to warn you about signature checking.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |