Assembly md4 algorithum.

Wojtek.Pilorz wpilorz at
Mon Nov 6 07:37:55 GMT 2006

On Sun, 5 Nov 2006, Wayne Davison wrote:

> Date: Sun, 5 Nov 2006 21:35:10 -0800
> From: Wayne Davison <wayned at>
> To: thomas david clarke <cam30724 at>
> Cc: rsync at
> Subject: Re: Assembly md4 algorithum.
> On Mon, Nov 06, 2006 at 03:28:52AM +0000, thomas david  clarke wrote:
> > Would the asm md4 implementation used by Shareaza (under the GNU GPL)
> > be appropreate to use in order to accelerate rsync?
> Since that would appear to compile with masm, we'd need a version that
> compiled with something more like gcc/gas.  Or perhaps the md4core.S
> file from the 1.5.12 release of Botan would be a better fit?  It would
> be interesting to be able to do a speed comparison to see if we could
> lower the CPU use in any kind of a significant way.
> Something to keep in mind:  older versions of rsync had bugs in the MD4
> handling, so a new implementation would need to either duplicate the old
> bugs (based on the protocol_version) or rsync would have to drop support
> for anything prior to protocol 27 (which was first supported in 2.6.0).
Perhaps keep existing implementation and use it for old protocol;
for new protocol version use new source, standard MD4 compatible, either C 
or assembly.

> ..wayne..
Best regards,


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