openwall / openwall/john

RAR archives that have been split into multiple volumes

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#2,758 2 comments 0 reactions 0 assignees View on GitHub

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enhancement
Dominant language
C
Stars
13.6k
Forks
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PR merge metrics
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Description

I would like an update to rar2john so that it can handle encrypted .rar archives that have been split into multiple volumes. Split volumes can be created by selecting a volume size when creating a .rar archive. This can be found in the General tab of WinRAR.

If it helps, a similar feature was added to 7z2hashcat which can be found here.

Contributor guide

Open the contributing guide

First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

Start by examining the rar2john entry point and the handling of encrypted RAR archives. Review the linked 7z2hashcat issue for related behavior, then identify how split volumes are represented and validated. Done means rar2john accepts encrypted multi-volume RAR archives and produces a usable result.

Written by the indexing model from the issue text.

Assessment

Tech stack
c
Domain
cli, security
Issue type
Feature
Difficulty
4/5
Estimated time
3-5 days
Activity status
Stale
Clarity
Mostly clear
Newbie friendliness
35/100

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