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Date: Fri, 8 Feb 2013 17:47:37 -0700
From: Stephen John Smoogen <smooge@...il.com>
To: john-users@...ts.openwall.com
Subject: Re: SSHA-512 supported?
On 8 February 2013 17:39, Solar Designer <solar@...nwall.com> wrote:
> On Fri, Feb 08, 2013 at 07:35:22PM -0500, Jon Schipp wrote:
>> In case this helps, from pwdalg.cfg
>>
>>
>> "cost_num=cost
>> *
>> * The default hashing iterations is 2^cost. The valid value of cost is
>> * an integer between 4 and 31, inclusive. The default cost value is 6."
>
> Isn't this written in context of bcrypt hashes (which they call sblowfish)?
> If so, we knew that, but it's irrelevant.
>
> Do you suspect they were dumb enough to apply the same low iteration
> counts for sha512crypt, where each iteration is a lot cheaper? Well,
> maybe. Got to test the 1 to 999 range.
Why yes... yes they would:
http://maben.homeip.net/static/computers/aix/aix61/AIX61%20Differences%20Guide.pdf
Algorithm Maximum Length of Iterations Length of Maximum
Password Salt, base64 Hashed Length
Length String, of Hashed
base64 Password, base64
SHA512 255 8 to 24-char 2^4->2^31 86-char 123-char
({ssha512}nn$salt$hashed_str)
The 6 says 6 rounds and not format 06 as we thought.
> 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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