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Date: Mon, 26 Mar 2018 16:54:43 +0200
From: Andriy Kizym <>
Subject: Re: How to utilities ethereum-opencl instead of ethereum

Which version of jtr do you use?

Can you post your prefix output from the command "python

As in this example:


On Fri, Mar 23, 2018 at 1:16 PM, ethanli <> wrote:

> I download ethereum wallet from and try to
> recover password of it by jtr.
> python wallet.json > eth.enc
> john --device=gpu  --format=ethereum-opencl eth.enc
> it returns´╝Ü
> Using default input encoding: UTF-8
> No password hashes loaded (see FAQ)
> if running without opencl format, it works very slowly.
> john --format=ethereum eth.enc
> Using default input encoding: UTF-8
> Loaded 1 password hash (ethereum, Ethereum Wallet [PBKDF2-SHA256/scrypt
> Keccak 256/256 AVX2 8x])
> Cost 1 (iteration count) is 262144 for all loaded hashes
> Cost 2 (kdf [0:PBKDF2-SHA256 1:scrypt 2:PBKDF2-SHA256 presale]) is 1 for
> all loaded hashes
> 0.03295g/s 2.109p/s 2.109c/s 2.109C/s
> Does that mean the format of such wallet can not utiliize the gpu?

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