Vivek Goyal <vgoyal at redhat.com> writes: > On Thu, Dec 19, 2013 at 01:54:39PM +0100, Torsten Duwe wrote: >> On Tue, Nov 26, 2013 at 09:27:59AM -0500, Vivek Goyal wrote: >> IMO it's up to user land to search lists of certificates, and present >> only the final chain of trust to the kernel for checking. >> >> ELF is the preferred format for most sane OSes and firmware, and a detached >> signature would probably be simplest to check. If we have the choice, >> without restrictions from braindead boot loaders, ELF should be first. >> And if the pesigning isn't usable and another sig is needed anyway, >> why not apply that to vmlinux(.gz) ? > > I have yet to look deeper into it that if we can sign elf images and > just use elf loader. And can use space extract the elf image out of > a bzImage and pass it to kernel. > > Even if it is doable, one disadvantage seemed to be that extracted > elf images will have to be written to a file so thta it's file descriptor > can be passed to kernel. And that assumed writable root and we chrome > folks seems to have setups where root is not writable. In that case the chrome folks would simply have to use an ELF format kernel and not a bzImage. Eric
