Signing .CAB files in linux?

Question

Hi,

I'm looking for a free (LGPL, etc) tool for digitally signing a Microsoft Cabinet files (.CAB) in Linux.

I have found a tool that does that job, named osslsigncode: I can't use it in our commercial product since its GPL. I can't even buy it since the guys who wrote it are unavailable.

For those who are wondering how I create the CAB files in Linux: I use a Perl Script called lcab, which can run of course in Linux.