[MS-BKRP] backupkey server and GnuTLS

[Andreas Schneider]

On Friday 13 November 2015 11:53:13 Andrew Bartlett wrote:
> On Thu, 2015-11-12 at 12:04 +0100, Andreas Schneider wrote:
> > Hello,
> > 
> > I've started to migrate the backupkey server implementation to
> > GnuTLS.
> 
> Great!  Having this use two crypto frameworks was insane - but
> required... :-)
> 
> > https://git.samba.org/?p=asn/samba.git;a=shortlog;h=refs/heads/master
> > -backupkey
> > 
> > The 5 patches before the TODO patch are working and pass the tests.
> > They can
> > be pushed upstream.
> > 
> > To move on we have an issue. GnuTLS doesn't provide a function to set
> > the
> > issuer unique id on a certificate. There is also no workaround
> > because the
> > flag is cleared before singing. The function will be added to the
> > next GnuTLS
> > release.
> > 
> > The bug for that is:
> > 
> > https://bugzilla.redhat.com/show_bug.cgi?id=1281343
> > 
> > 
> > As soon as the function is available I will add functions to use
> > GnuTLS, if
> > not we will use the existing heimdal code. This means with a MIT KDC
> > build you
> > will need a recent GnuTLS release.
> 
> I think that also fixes some other issues we had.  In particular, see
> the comments around gnutls_privkey_export_rsa_raw() and please add some
> kind of assertion that this is fixed in the version used.

What do you mean exactly. The bignum conversion issue? bignums are always big 
endian.

-- 
Andreas Schneider                   GPG-ID: CC014E3D
Samba Team                             asn at samba.org
www.samba.org