Re: [libvirt] More logs from libvirt+qemu+VNC+SASL

On Fri, Dec 07, 2018 at 12:25:18PM +0100, Tomasz Barański wrote: > Hello > > I'm working on supporting VNC console on FIPS-enabled oVirt hosts[1]. I > made qemu use SASL as authentication method instead of regular passwords. > However, no matter what I do, I can't get it to accept credentials provided > with a VNC client. > > Is there a way to get some qemu/SASL logs? I need to understand why the > credentials are not accepted. > > Any pointers to docs/code/old bugs appreciated. There's not much in way of debugging with SASL server side. Client side you can use --gtk-vnc-debug arg to virt-viewer to see messages. Can you explain in more detail what you've done to try to make it work ? For plain password auth you need... In /etc/libvirt/qemu.conf set (uncomment) vnc_tls = 1 vnc_sasl = 1 vnc_listen = 0.0.0.0

Then setup x509 certificates for the QEMU and your client application

THen in /etc/sasl2/qemu.conf mech_list: scram-sha-1 sasldb_path: /etc/qemu/passwd.db

Now "saslpasswd -a qemu test".

Make sure the password file is readable by qemu

Regards, Daniel