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Date: Thu, 06 Jan 2011 20:14:37 -0600
From: James Nobis <quel@...lrod.net>
To: john-users@...ts.openwall.com
Subject: Re: hmailserver patch has errors, error when compiling
 in Linux x86 64-bit and 32-bit

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Solar,

> My understanding is that SHA-256 is only available starting with
> OpenSSL 0.9.8, whereas the jumbo patches require 0.9.7+ so far (not
> necessarily 0.9.8+).  So if we merge the hmailserver support patch, we
> make the jumbo patch require 0.9.8+, which is a bit of a problem
> (although it's becoming more acceptable over time).  Maybe we should
> include a SHA-256 implementation into the patch itself for now.

You are entirely correct regarding 0.9.8+ for SHA-256.  It seems it is a
problem for Owl but 0.9.7 should really get retired.  In general one can
always write optimized code that outperforms generic OpenSSL
installations so as I noted initially there is a need for optimization.

> Another comment I had is that maybe we need "generic salted SHA-256"
> support, similar to what I did for SHA-1 and MD4 recently, instead of
> the specialized hmailserver support patch.

That is also a great idea as hmailserver wasn't even something I had
heard of before I wrote the patch.  Is this an item you have the time
and interest to do?

If someone can point me to a license acceptable SHA-256 implementation
or someone can add one that would be greatly appreciated.

I want to support the patch I wrote as I wrote it for a friend but
posted it because I expect it may be of use to someone else as well.
However, my free time is quite limited and I wrote this as a short break
from work on my project.  I welcome any updates to the patch that make
it acceptable for the jumbo patch as well as feedback on what items I
will have to address myself.

James
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