[dm-crypt] migrate luks key-slots to another luks container

Arno Wagner arno at wagner.name
Wed Jan 16 21:14:55 CET 2013


I don't think that is possible at the moment. The experimental
"cryptsetup-reencrypt" requires all passphrases that should remain 

Any reason why you want to change the cipher? After all, you can
not enlarge the key and keep the keyslots.

As to size, just enlarge the partition. Offset, I don't know,
but if you do not need to keep any data, just changing the
repective fiels in the header should do it. But is there really
any reason to change the offset?


On Wed, Jan 16, 2013 at 08:57:47PM +0100, Alexander 'Leo' Bergolth wrote:
> Am 16.01.2013 19:50, schrieb .. ink ..:
> >    Is it possible to move the passphrases from one luks container to a new
> >    one with different cipher, size and payload offset? (There is currently
> >    no data on the new container, I just want to keep the old passphrases.)
> >
> >any reason why you dont want to just add those old passphrases to the
> >new container using "luksAddKey"?
> I'd like to transfer the key-slots so that the same passphrases can
> be used to unlock them.
> I don't know the passphrases. (Just one of them.)
> Cheers,
> --leo
> -- 
> e-mail   ::: Leo.Bergolth (at) wu.ac.at
> fax      ::: +43-1-31336-906050
> location ::: IT-Services | Vienna University of Economics | Austria
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Arno Wagner,     Dr. sc. techn., Dipl. Inform.,    Email: arno at wagner.name
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