[Pkg-openssl-devel] Bug#680137: Bug#680137: irssi: Can't connect to SSL-enabled server after upgrading libssl

[John Morrissey]

On Sun, Apr 07, 2013 at 12:44:22AM +0200, Kurt Roeckx wrote:
> On Sat, Apr 06, 2013 at 06:25:42PM -0400, John Morrissey wrote:
> > On Sat, Apr 06, 2013 at 09:07:50PM +0200, Kurt Roeckx wrote:
> > > On Sat, Apr 06, 2013 at 01:47:51PM -0400, John Morrissey wrote:
> > > > On Fri, Jan 11, 2013 at 03:10:32PM +0100, Clement Hermann (nodens) wrote:
> > > > > With some more test and some help from a friend, we made some progress.
> > > > > 
> > > > > It *does* work when adding -no_tls1_1 option to openssl s_client.
> > > > > 
> > > > > It works if the server allows renegociation : I can connect to
> > > > > freenode.
> > > > > 
> > > > > It seems to be #665452 again, or a variant.
> > > > > 
> > > > > Anyway, that explains why it works in ubuntu. The patch
> > > > > tls12_workarounds.patch (attached) works around it (but I'm not
> > > > > qualified to tell whether this is an acceptable solution or not).
> > > > 
> > > > I noticed the same thing with ircd-hybrid (rebuilt per the package's
> > > > instructions to enable SSL support) after upgrading to wheezy recently.
> > > > 
> > > > wheezy's irssi refused to connect to the ircd, which was running on the
> > > > local host and linked to the same version of OpenSSL:
> > > > 
> > > >   140308295767720:error:1408A0C1:SSL routines:SSL3_GET_CLIENT_HELLO:no shared cipher:s3_srvr.c:1355:
> > > 
> > > Can you reproduce this problem with s_client trying to connect to
> > > the irc server?
> > > 
> > > Looking at the hybrid source, it doesn't seem to contain any
> > > calls to something like OpenSSL_add_all_algorithms().  My
> > > guess would be that adding that call would fix the problem.
> > 
> > Hm, I tried just now, but couldn't reproduce with s_client. However, the
> > issue was still reproducible with irssi+openssl 1.0.1e.
> 
> I tried conneting with irssi to something and that gave me a
> working TLS 1.2 connection.  I currently don't see irssi doing
> anything wrong.
> 
> Do you have a public irc server I can try and connect to?

I dug into this a little more, and it turns out I *can't* reproduce it now,
even with 1.0.1e installed.

When I checked earlier today, I wasn't connecting to the ircd with the right
password. I have a super low reconns interval, so the initial connection
scrolled past, and subsequent connections failed with a handshake error.
I'm guessing that's due to irssi's misbehavior, since when I put gdb on the
ircd, it seemed to be working properly given the input irssi was sending.

I got the 'no shared ciphers' error above by modifying the ircd-hybrid
source to call ERR_print_errors_fp() in ssl_handshake(), so it was
definitely a problem at one point. I'm not sure why I can't reproduce now.

john
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