Werner Koch
Mon, 10 Jun 2002 13:52:22 +0200

On Mon, 10 Jun 2002 11:23:54 +0100, Matthew Byng-Maddick said:

> So you specify your 3DES key as <56bit DES Key><56bit DES Key>

> I'm not sure quite how to do this with gcrypt, however.

I see no reason why this should not work.  You have to use 2 64 bit
keys of course because the high bit is ignored.  This is a workaround
with the disadvantage that it is much slower, it was invented to
use 3DES hardware for 1DES.