> This sounds like the same problem I ran into recently. I saw the exact
> same behavior when I tried compiling the current version of the example
> programs against the GnuTLS libraries that came with my operating
> system. (GnuTLS 2.8.5 on Ubuntu 10.04.)
> I'm assuming my issue (and therefore yours) is that I was running
> example code that was meant for GnuTLS 3.x against an installed library
> that was GnuTLS 2.x. (And, presumably the change in major version
> indicates an incompatibility, although unfortunately in this case it's a
> rather subtle one.)
You are right. The example in the website enables elliptic curve
anonymous Diffie-Hellman which doesn't exist in gnutls 2. The error is
subtle because the examples do not include error checking and thus do
not catch the error in gnutls_priority_set_direct().
If you fix the priority string the same example should work as is.