Fast x86 DES patchkit for SSH-1.5-1.2.22
Phil Karn
April 2, 1998 (updated for SSH-1.2.22)

This is a patchkit for the freeware Secure Shell distribution that
replaces the existing DES code with a fast version in hand-tuned
assembler for the Intel x86 processors. The replacement code runs at
least 50% faster than the DES code already in freeware SSH.  Both
single-key and 3-key DES modes use the fast DES code.

This code successfully builds and runs on two different x86 platforms:
BSD/OS 2.1 and Debian Linux. The latter uses ELF object file formats;
the former does not.

The patches are designed to be applied to the stock SSH-1.2.22.tar.gz
distribution available as

<ftp://ftp.gw.com/pub/unix/ssh/ssh-1.2.22.tar.gz>

among many other places; see <http://ww.cs.hut.fi/ssh/> for a complete
list.