[dm-crypt] Integrate cryptsetup in bootloader

Arno Wagner arno at wagner.name
Tue Nov 19 03:52:46 CET 2013


this topic crops up from time to time. First, doing this yourself 
is hard, hard enough that if you have to ask how to do it, you 
will find it severely challenging. 

That said, it has been done by several distros that can be installed
with "full root encryption". (Full disk encryption is not doable with
cryptsetup. That would need BIOS support.) Best get one of the
distros that do it. They usually just pack cryptsetup and its
libaries into the initrd and write some scripts around it.

One example I use on a laptop is Linux Mint, which will just show
you a box to enter your encrytpion password before booting any futher. 
I expect Debian and Ubuntu can do something similar. 

Best recommendation if you want to do something like this yourself 
is to analyze the initrd of a distro that has it working and go from 


On Tue, Nov 19, 2013 at 03:20:43 CET, Trinh Van Thanh wrote:
> Hi all,
> Unencrypted boot partition is not safe for some special requirements. So I
> want to increase the secure level for full disk encryption using dm-crypt.
> Can I integrate cryptsetup in bootloader (example GRUB2) or is there any
> other solutions?
> Thanks in advanced,
> -- 
> ​Trinh Van Thanh​

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Arno Wagner,     Dr. sc. techn., Dipl. Inform.,    Email: arno at wagner.name
GnuPG: ID: CB5D9718  FP: 12D6 C03B 1B30 33BB 13CF  B774 E35C 5FA1 CB5D 9718
There are two ways of constructing a software design: One way is to make it
so simple that there are obviously no deficiencies, and the other way is to
make it so complicated that there are no obvious deficiencies. The first
method is far more difficult.  --Tony Hoare

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