john-users - Re: 2 Qs on john1.6 (stable)

Openwall GNU/*/Linux 3.0 - a small security-enhanced Linux distro for servers

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Date: Sat, 10 Sep 2005 11:53:11 +0200
From: Christian Karpp <xn@...delbg.ibm.com>
To: john-users@...ts.openwall.com
Subject: Re: 2 Qs on john1.6 (stable)

Solar Designer wrote:
> You might get around this by reducing the compiler's optimization level
> (e.g., replace the -O2 with -O1) for all or for some source files (you
> can compile DES_std.c into DES_std.o invoking cc manually).

Good hint. Unfortunately I have to skip optimization completely under 
AIX 5.3 for BSDI DES (x725), Kerberos AFS DES and NT LM DES in order for 
the benchmark not to fail. The results however are dramatically lower 
than with optimization - on all tests. Pity.

> Alternatively, you may use a John binary off one of the AIX machines
> where it gets compiled correctly.

This is interesting. When running an AIX 5.1 binary under AIX 5.3, I get 
slightly lower benchmark results overall. But the tests that failed 
before, perform much much better than using the unoptimized binary.

I guess I have to live with that little drawback... :)

BTW, I've used john-1.6.38 this time...

Xn.