[dm-crypt] Truecrypt system partition support

Milan Broz gmazyland at gmail.com
Thu Jun 20 18:50:10 CEST 2013

On 06/20/2013 12:03 PM, Jan Janssen wrote:
> Hi,
> I just stumbled upon truecrypt support in cryptsetup. It sounds nice,
> but there is one big issue that prevents it from being useful in
> situations where the truecrypt partition is encrypted using system mode
> and other partitions on the drive are mounted/in use (such as dual boot
> on a single drive system).
> There is this small limitation that you have to specify the
> whole device for opening tcrypt system devices. And the fact that 
> tcryptOpen refuses to open if that device is mapped/mounted already
> prevents me from using cryptsetup altogether for my truecrypt partition.
> It would be nice if this could be fixed/worked around with.


well, you are probably the first real user I know about who tried system encryption
truecrypt mapping :) So it is quite possible there are some problems.

Please can you describe exactly you configuration (I think I understand the problem
but exact description could be better.)
Why is main device used? Mapped/mounted other partition or something else?
Should be easy to fix I think (we have already --shared option for plain mode).

(If you are able to map it with normal truecrypt in Linux, output of lsblk
with encryption mapping active should be enough for me.)


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