Re: [PATCH RFC] GnuTLS: Support TOFU certificate checking.

["Toke Høiland-Jørgensen" <toke@toke.dk>]

Lars Magne Ingebrigtsen <larsi@gnus.org> writes:

> It would validate the certificate, but never drop the connection even
> if the certificate is invalid. It would be up to `open-network-stream'
> to close the connection if the user decides to not accept the invalid
> (or self-signed) certificate.

FWIW this was what I understood from your earlier emails as well. It
does mean that the handshake will be completed before validation is
done, which goes counter to how these things are usually done. Not sure
if that is a problem; it surely will be if there's lisp code that
doesn't go through open-network-stream...

Another alternative would be to fail in the C code and report why, along
with the cert details; and then make it up to the lisp code to retry the
connection with appropriate flags set to ignore (some) errors based on
user response... That would be similar to how the gnutls lisp/C
interaction is now (I think), with the addition that certificate details
are returned along with any errors signalled...

-Toke