On Wed, Sep 5, 2012 at 1:51 AM, David Howells <dhowe...@redhat.com> wrote: > Lucas De Marchi <lucas.de.mar...@gmail.com> wrote: > >> Or let the magic string as the last thing in the module and store the >> signature length, too. In this case no scanning is needed > > Indeed. This is the better way. > > The main problem is rendering the length from a shell script. It's trivial to > do as ASCII (there's a printf program), but a pain to render to binary. I'm > sure it can be done with perl or python without the need to compile anything. > > David
That is very easy to do from script as well. See script in my tree. http://git.kernel.org/?p=linux/kernel/git/kasatkin/linux-digsig.git;a=blob;f=scripts/modsig.sh;h=4e997c3996d71d8e1afeb3a7afe23b3f303b9f63;hb=59f1d5352969166f2f32f84e07e20dd1b30a890f 110 # add signature length - big endian 111 dec2hex $(stat --printf %s $sigfile) 4 | hex2bin $sigfile 112 echo -n "This Is A Crypto Signed Module" >>$sigfile well. I have couple of small functions in the script. dec2hex and hex2bin - Dmitry -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
