At Tue, 06 Nov 2012 00:01:52 +0000, David Howells wrote: > > Takashi Iwai <ti...@suse.de> wrote: > > > this is a patch series to add the support for firmware signature > > check. At this time, the kernel checks extra signature file (*.sig) > > for each firmware, instead of embedded signature. > > It's just a quick hack using the existing module signing mechanism, > > thus provided only as a proof of concept for now. > > There is another way to do this. If you look at the patches I proposed to > wrap keys in PE binaries, you'll find that that can handle PKCS#7 format > messages as that's what's in the sort of signed PE binary we're dealing with. > > You could use this to put the firmware inside a signed-data PKCS#7 message.
Yeah, embedding the signature is more straightforward. Actually I tried the embedded signature (just like module) at first, then a couple of concerns arose: - Legally unclear about "modifying" the firmware data or file, - The signed firmware is no longer compatible with the older kernel, thus bad for distro packaging. thanks, Takashi -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
