Re: [Qemu-devel] Error when attempting to perform TLS NBD connection

["Daniel P. Berrange" <berrange@redhat.com>]

On Tue, Apr 05, 2016 at 09:01:10PM +0100, Alex Bligh wrote:
> When I attempt to connect via TLS like this (using today's qemu master):
> 
>    ./qemu-img info --object tls-creds-x509,id=tls0,dir=../certs,endpoint=client --image-opts driver=nbd,host=127.0.0.1,port=6666,export=foo,tls-creds=tls0
> 
> (command line from Daniel over IRC)
> 
> I get the rather opaque error:
> 
>    qemu-img: Unable to initialize certificate
> 
> and with the patch I sent through I get the not much less opaque error:
> 
>    qemu-img: Unable to initialize certificate: ASN1 parser: Element was not found.
> 
> gdb indicates this is crypto/tlscredsx509.c:399 where gnutls_x509_crt_init(&cert) fails.


So the problem turned out to be that the qemu-img program failed to
call qcrypto_init(), so gnutls had not had its one-time initialization
performed. This doesn't matter for gnutls 3.x but does for anything
older than that. I just copied you on a patch to fix this.

Regards,
Daniel
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