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Date: Sat, 9 Feb 2013 04:53:44 +0400
From: Solar Designer <solar@...nwall.com>
To: john-dev@...ts.openwall.com
Subject: Re: sha512crypt formats matching salt detection bug
On Fri, Feb 08, 2013 at 10:50:17PM -0200, Claudio Andr? wrote:
> Is there a minimun number of rounds? I mean, is 999 the mininum rounds
> allowed by some spec?
1000 is the minimum per Ulrich's original spec (SHA-crypt.txt and
reference implementations of sha512crypt and sha256crypt). However,
apparently IBM deviated from that. Apparently, it's a minimum of 16
there.
We should support any number of rounds, starting with 1.
Anyhow, the bug that I reported has nothing to do with specific round
counts. It's about including the round counts in "salts".
Alexander
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