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Date: Mon, 6 Aug 2012 22:13:26 +0530
From: Dhiru Kholia <dhiru.kholia@...il.com>
To: john-dev@...ts.openwall.com
Subject: Cracking PuTTY private keys with JtR
Hi,
I have added support for cracking PuTTY password protected private
keys to JtR. My code is based on
http://neophob.com/2007/10/putty-private-key-cracker/ by michu.
Usage:
1. Compile ppk2john.c (run "gcc ppk2john.c -o ppk2john" in src folder)
2. Run ppk2john on PuTTY private key files.
3. Run john on the output of ppk2john.
Benchmarks:
$ ../run/john -fo:ppk -t # AMD X3 720 BE CPU
Benchmarking: PuTTY Private Key SHA-1 / AES [32/64]... (3xOMP) DONE
Raw: 409920 c/s real, 138020 c/s virtual
Real cracking is slower than the benchmark (around 73,000 c/s per
core). Standalone cracker (for debugging, no longer recommended for
real use) can be obtained from
https://github.com/halfgenius/ppkcracker. GPG secret keys are next on
my list.
--
Cheers,
Dhiru
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