Recently I have purchased an Elitebook 8470p.
According to:
h10032.www1.hp.com/ctg/Manual/c03654081.pdf
and
h10032.www1.hp.com/ctg/Manual/c03857419.pdf
it is possible to install custom keys into the bios UEFI using a "software from the OS" but I have not come across any software that could do the job.
I use self compiled linux kernels and hence I need this to enable secure boot. Any help in this matter is highly appreciated. Also note that "KeyTool" fails to install my custom keys in BIOS.