Can Bitcracker use multiple GPU's in OpenCL mode ???

[joao-vaz-martins]

My bitlocker disk is proteced with a TPM and a Bitlocker recovery Key

I used "FTK_Imager_4.7.1" to create the RAW dis image and after i used "bitlocker2john -i disk.img > hash.txt" and got two hashes $bitlocker$2$ and $bitlocker$3$.

In order to get recover the Bitlocker recovery key i used "John --format=bitlocker-opencl -mask=?d?d?d?d?d?d[-]?d?d?d?d?d?d[-]?d?d?d?d?d?d[-]?d?d?d?d?d?d[-]?d?d?d?d?d?d[-]?d?d?d?d?d?d[-]?d?d?d?d?d?d[-]?d?d?d?d?d?d target_$3$_hash > Bitlocker_Recovery_Key" but its taking a long time

My questions are: 1- Can i use with Bitlocker the hashes that i got with "Bilocker2john" ? (if not o need to get them with Bicracker again) 2- If yes, what would be the commnad to hack the Bitloker recovery key with OpenCL ? (similar to the mask like the one we use with John) 3- I'm using a computer with dual GPU in Crossfire. Is it possible to use both GPU's (use multiple OpenCL devices) to speed up the process?????

Kind regards, Joao Vaz Martins

[Caveman8080]

Hello Joao,

Let me see if I can answerer your quests to the best of my abilities.

1. I'm not sure if the hash outputs from bitlocker2john are in the same format that are created with bitcracker. I would suggest you use the bitcracker_hash executable, built within bitcracker, on the image that you created.

2. To use bitcracker using OpenCL, build the bitcracker_opencl executable within bitcracker. Bitcracker does not have a bruteforce option when trying to recover user or recovery passwords. You'll need to build and use the bitcracker_rpgen executable to generate a recovery password list. You can then run ./build/bitcracker_opencl -f hash_recv_pass.txt -d wordlist.txt. More options can be found with bitcracker_opencl -h

3. Currently, bitcracker does not have multi GPU/CPU support.