Openwall GNU/*/Linux - a small security-enhanced Linux distro for servers
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Date: Fri, 8 Feb 2013 20:10:15 -0700
From: Stephen John Smoogen <>
Subject: Re: SSHA-512 supported?

On 8 February 2013 17:57, Solar Designer <> wrote:

> Anyway, still no luck with rounds=64.

Here is another dead end in case anyone looks at this later. I went to
look at the source code of the various sha512crypt and they all
defaulted to a minimum of 1000 rounds even when told not to. [Solar's
perl may already patched around this to look for rounds less than 64.]
but if others do it they would end up with

perl -e 'print crypt("colorado", "\$6\$rounds=64\$otYx2eSXx.OkEY4F"), "\n";'

I found that the python version had a built in version that could be
used in case the system didn't have sha512crypt built into systems
crypt.. so I went and patched that to remove the minimum of 1000 and
went from 2^0 -> 2^20 . No luck on matching either the colorado or
test string.

So like I said.. a dead end, but one that others don't have to follow:

> Alexander

Stephen J Smoogen.
"Don't derail a useful feature for the 99% because you're not in it."
Linus Torvalds
"Years ago my mother used to say to me,... Elwood, you must be oh
so smart or oh so pleasant. Well, for years I was smart. I
recommend pleasant. You may quote me."  —James Stewart as Elwood P. Dowd

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