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Message-ID: <CAC2cQXqVa-yZxxgZQaGb3A-B93Z1V9ONovCtCFDjVTRb36OVFw@mail.gmail.com>
Date: Thu, 23 Aug 2012 00:44:41 +0200
From: Knug Carl Gustf <erik.andersson1980@...il.com>
To: john-dev@...ts.openwall.com
Subject: [PATCH] Speed up VNC encryption by pre-computing DES_set_odd_parity()
Hello, friends of the computer security industry!
The attached patch speeds up VNC encryption by just over 20% on my
64-bit Apple and Dell devices.
It should apply cleanly to the master branch of the magnum-jumbo tree.
Most of the speed is gained by applying DES_set_odd_parity() to the
bit_flip[] array in advance. A few more percent increase in speed is
gained by replacing the call to DES_set_key_checked() with a call to
DES_set_key_unchecked(). Unlike the former, the latter neither does
parity nor weak DES key checks.
--
With love and respect,
Knug Carl Gustf
(email is borrowed, please call +46-(0)20-795611 for inquires)
Swedish Civil Contingencies Agency
SE-651 81 KARLSTAD
Sweden
Switchboard: +46-(0)20-795611
Fax: +46-(0)10-2405600
Download attachment "vnc-pre-computed-DES-parity.patch" of type "application/octet-stream" (4715 bytes)
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