This is a contribution to Coreboot, which is an alternative to UEFI/BIOS.
As much as I dislike US government agencies in general, I think this time they have good motive to provide good code. Undermining this code would also undermine the systems of other government agencies.
In this case, I trust the NSA more than random contributors on the internet that have less known motives and may in many cases be agents of foreign spy agencies.