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Date: Wed, 26 Oct 2005 17:26:30 +1000
From: "David Luyer" <david@...er.net>
To: <john-users@...ts.openwall.com>
Subject: Patch: Improved raw-md5 and new format (Post.Office MD5)
I'd like to submit the attached patch to John the Ripper.
Please feel free to include the patch on the website or in
any future version (it is released under the terms of GPL
version 2).
The patch:
1. Improves the performance of raw-md5 around 20% compared
to the version currently on the website. [1]
2. Implements the Post.Office MD5 crypt format, which may
be found in Post.Office and in LDAP directories migrated
from Post.Office (for example, OpenWave and qmail-ldap
can support this crypt format).
For more details, read the patch.
Tested on little-endian 32-bit and big-endian 64-bit.
David.
[1] Example - Athlon64 3500 in 32-bit mode
(linux-x86-64-mmx)
Before: [2]
2409K c/s real, 2419K c/s virtual
2410K c/s real, 2420K c/s virtual
2437K c/s real, 2457K c/s virtual
2454K c/s real, 2459K c/s virtual
2398K c/s real, 2408K c/s virtual
After: [3]
2808K c/s real, 2813K c/s virtual
2898K c/s real, 2910K c/s virtual
2959K c/s real, 2971K c/s virtual
2947K c/s real, 2959K c/s virtual
2991K c/s real, 3003K c/s virtual
Speedup: 20.5%
Example - UltraSPARC-IIIi 1002MHz in 64-bit GCC mode
(solaris-sparc64-gcc)
Before:
822951 c/s real, 822951 c/s virtual
825384 c/s real, 825384 c/s virtual
822242 c/s real, 822242 c/s virtual
823006 c/s real, 823006 c/s virtual
826447 c/s real, 826447 c/s virtual
After:
967705 c/s real, 971583 c/s virtual
966351 c/s real, 966351 c/s virtual
968198 c/s real, 968198 c/s virtual
966123 c/s real, 966123 c/s virtual
968405 c/s real, 968405 c/s virtual
Speedup: 17.5%
[2] Earlier "before" test runs were at 2300K c/s, however when I
ran this again to get five times they were all higher.
[3] Earlier "after" test runs were at 3100K c/s to 3200K c/s
however this was due to an error in the memset() call
which didn't show up as the memory was usually already zero.
It may be possible to improve performance towards these
levels if the memory can be zero'd faster than it is by
memset(), for example perhaps a memcpy from memory which
is already zero?
Download attachment "john-1.6.39-rawmd5-pomd5.diff.gz" of type "application/x-gzip" (5929 bytes)
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