[Libguestfs] Add Remote Disk with SAS Key

I'm trying to read the contents of a remote vhd and running into some problems. I suspect the issue has to do with the inclusion of a SAS key in the url. Does anyone have any experience with this, or recommendations on where to begin looking to make a fix? Here's the verbose (debug) log and command I'm trying to run. https://gist.github.com/gabrielhartmann/6114578065eae011a2b3 -- Gabriel