Hi! > For the symmetric key solution, I will try HMAC (Hash Message > Authentication Code). It's already used in networking, hope the > performance is not too bad to a big image. Kernel already supports crc32 of the hibernation image, you may want to take a look how that is done. Maybe you want to replace crc32 with cryptographics hash (sha1?) and then use only hash for more crypto? That way speed of whatever crypto you do should not be an issue. Actually... Is not it as simple as storing hash of hibernation image into NVRAM and then verifying the hash matches the value in NVRAM on next startup? No encryption needed. And that may even be useful for non-secure-boot people, as it ensures you boot right image after resume, boot it just once, etc... Pavel -- (english) http://www.livejournal.com/~pavelmachek (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html -- To unsubscribe from this list: send the line "unsubscribe linux-efi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
