Re: Integrating grub2tc into upstream GRUB

[Simon Schubert <2@0x2c.org>]

Hi Vladimir,

On 07/06/2011 02:30 PM, Vladimir 'φ-coder/phcoder' Serbinenko wrote:
>  Note: I treat truecrypt as a proprietary software but due to its
>  popularity it makes sense to support it.

Is it proprietary?  I'm currently not using Windows, so I don't have a 
working grub2tc setup.  But I'm happy to help, and it did work before.

>  On 06.07.2011 14:28, Vladimir 'φ-coder/phcoder' Serbinenko wrote:
> > Hello, I've had a look into your grub2tc project and I think it can
> > be successfully changed into a GRUB2 module. extract.rb would need
> > to be rewritten in C. tcloader.S would mostly disappear and be
> > replaced with a small C code to set the registers and load the
> > file. Could you tell me the expected load address and register
> > values?

All what I ever found out went into these files, so they are our only 
documentation now :)

What I remember was that the TC boot code expects the data blocks to be 
in one of two possible locations.

> > Also current license prohibits direct use of your code in GRUB2.
> > Could you drop the Affero clause? IT's useful mainly for
> > network-based projects.

Yes, I'm happy to relicense it as GPL3 for the use in GRUB2.

> > Also a possibility is to dump the contents of MBR gap on grub-setup
> > and if it's a truecrypt loader, save it in a file.

I think I looked into this, but the code is slightly different and 
accesses data of the gap that will be overwritten by grub.  Therefore I 
decided to use the cd image boot code.

> > Do you know of any signature which can be used for this? This way
> > we can integrate truecrypt into grub-mkconfig. Thank you in
> > advance

I'd have to go and install TC and/or read the code.  I'm pretty sure TC 
uses some signature internally, but I forget what it was.

cheers
   simon