openwall / openwall/john

Make BitLocker CPU format feature complete

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#3,310 5 comments 0 reactions 0 assignees View on GitHub

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enhancement
Dominant language
C
Stars
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Forks
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PR merge metrics
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Description

Currently, the BitLocker OpenCL format (bitlocker-opencl) format support more hash formats than the CPU version.

It would be great if the CPU format (bitlocker) could be made more feature complete.

CC @e-ago Hi, I am still waiting for the high-level description of the algorithm+steps which are implemented in the BitLocker OpenCL kernel. I don't want to spend hours trying to reverse-engineer the heavily unrolled code in this kernel.

@e-ago Can you please work on making the CPU format feature complete?

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Research direction

Compare the CPU bitlocker format with bitlocker-opencl, starting by deriving the algorithm and steps implemented by the heavily unrolled OpenCL kernel. Identify which hash formats and features are missing from the CPU version; done means the CPU format supports the relevant OpenCL capabilities and their behavior is verified.

Written by the indexing model from the issue text.

Assessment

Tech stack
c
Domain
security
Issue type
Feature
Difficulty
5/5
Estimated time
Over a week
Activity status
Stale
Clarity
Needs clarification
Newbie friendliness
25/100

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