Encrypted CD/DVDs via gbde or otherwise

[Dag-Erling Smørgrav]

"R. W." <list-freebsd-2004 at morbius.sent.com> writes:
> I have some data in an encrypted gbde partition. I'd like to be able to 
> move some of it out to CD-R or DVD in an encrypted, mountable form (as 
> opposed to simply encrypting a tar file and burning that).
>
> Most other encryption schemes support this through container files. You 
> create a 650MB container, mount/attach it, copy the data, 
> unmount/detach the container, and burn it to CD as a single file on a 
> data disk.
>
> AFAIK gbde doesn't support container files. Is it on the roadmap? Or is 
> there any alternative.

(untested)

# dd if=/dev/zero of=container bs=1048576 count=650
# mdconfig -a -t vnode -f container
# gbde init /dev/md0
# gbde attach /dev/md0
# newfs /dev/md0.bde
# mount /dev/md0.bde /mnt
# <copy files to /mnt>
# umount /mnt
# gbde detach /dev/md0
# mdconfig -d -u 0
# burncd data container fixate

you should then be able to 'gbde attach /dev/acd0' and mount
/dev/acd0.bde wherever you like.

DES
-- 
Dag-Erling Smørgrav - des at des.no