Re: international crypto patch as non-kernel-patch...

[Andi Kleen <ak@suse.de>]

On Sat, Apr 21, 2001 at 04:05:36PM -0700, Dan Hollis wrote:
> On Sun, 22 Apr 2001, Herbert Valerio Riedel wrote:
> > there's only one issue I'm fighting with... that damned broken IV
> > calculation... :-/
> 
> Is this why 2.4 blowfish crypto won't work with 2.2 blowfish crypto?

I don't know anything about the "blowfish crypto" you use, the following
is a generic statement.

The encrypted on disk files are incompatible if the crypto module used
the 2.2 IV directly. You can write a 2.4 crypt module that can still
read 2.2 files, but it needs some changes -- it needs to manually remap
the relative numbers via bmap to absolute. 2.2 passed absolute block numbers, 
which was really broken, 2.4 switched to relative logical block numbers
(which still have some problems, but are not too bad).


-Andi

Linux-crypto:  cryptography in and on the Linux system
Archive:       http://mail.nl.linux.org/linux-crypto/