RE: cipher length

[Don <dr2@xxxxxxxxxxxx>]

Leif,

1- ALWAYS "PRESUME"....NEVER "ASSUME".  The net is the same result, BUT
you won't get some ASS that tries to hyphenate a word that was never
intended to be...

So, then the next question is, has anyone converted DES to MI or RPG for
the 400 that would want to share?



On Wed, 5 Jan 2000, Leif Svalgaard wrote:

> you are, of course, correct. The 64-byte restriction did not appear
> in S/38 so I ASSumed it wouldn't be there for the AS/400, but
> it is. My guess:  IBM want you to purchase their cryptographic
> support and not use CIPHER to do it so the DES function has
> been deliberately crippled. Maybe this was necessary to
> obtain an export license for the microcode?
> 
> 
> > -----Original Message-----
> > From:       Gene_Gaunt/ReviewWorks@reviewworks.com
> > [SMTP:Gene_Gaunt/ReviewWorks@reviewworks.com]
> > Sent:       Wednesday, January 05, 2000 1:58 PM
> > To: MI400@midrange.com
> > Subject:    RE: cipher length
> > 
> > CIPHER source lengths over 64 generate MCH5601,
> > "Template value not valid".
> > 
> > Calculating sixteen 48-bit subkeys adds some overhead when
> > DES starts; why not do this once and let source length run long?
> > 
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