ui: ensure VNC websockets server checks the ACL if requested

If the x509verify option is requested, the VNC websockets server
was failing to validate that the websockets client provided an
x509 certificate matching the ACL rules.
Signed-off-by: NDaniel P. Berrange <berrange@redhat.com>
Signed-off-by: NGerd Hoffmann <kraxel@redhat.com>

ui/vnc-ws.c

@@ -45,6 +45,16 @@ static int vncws_start_tls_handshake(struct VncState *vs)
         return -1;
     }
 
+    if (vs->vd->tls.x509verify) {
+        if (vnc_tls_validate_certificate(vs) < 0) {
+            VNC_DEBUG("Client verification failed\n");
+            vnc_client_error(vs);
+            return -1;
+        } else {
+            VNC_DEBUG("Client verification passed\n");
+        }
+    }
+
     VNC_DEBUG("Handshake done, switching to TLS data mode\n");
     qemu_set_fd_handler2(vs->csock, NULL, vncws_handshake_read, NULL, vs);