openwall / openwall/john

Blockchain2john Not Working for early Blockchain Wallets

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bug enhancement
Dominant language
C
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Description

Blockchain2john still not working on Early Blockchain Wallets. Please see attached file.
wallet.zip

Btcrecover can solve it by changing the entropy to 6.9

btcrecover/btcrecover/btcrpass.py

Line 1817 in 4016a9c

if entropy_bits < 7.2:

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 at the blockchain2john entry point and test it with the attached wallet.zip, then compare the wallet handling with btcrecover/btcrpass.py at line 1817 and its entropy condition. Done means early Blockchain wallets produce usable output for password recovery, with the behavior verified against the supplied wallet.

Written by the indexing model from the issue text.

Assessment

Tech stack
c, python
Domain
blockchain, security
Issue type
Bug
Difficulty
4/5
Estimated time
3-5 days
Activity status
Stale
Clarity
Mostly clear
Newbie friendliness
30/100

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