openwall / openwall/john

Add support for pkAES-256 Deflate encrypted ZIP file

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#5,573 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

zip file encrypted using pkAES-256 unable to generate hash

zip2john m.zip > m.zip-hash
ver 5.1 m.zip/Encrypt Marriage Certificate.pdf is not encrypted, or stored with non-handled compression type

zipinfo-v.txt
john-list-build-info.txt
p7za-m.zip.txt

Contributor guide

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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 with zip2john m.zip and compare its output with zipinfo-v.txt and p7za-m.zip.txt; read john-list-build-info.txt for the reported build context. Done means zip2john generates a usable hash for the pkAES-256 Deflate archive without the current unsupported-compression message.

Written by the indexing model from the issue text.

Assessment

Tech stack
c
Domain
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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