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The firmware for the USB Type-C power adapters uses raw binary blobs for the public keys and signatures instead of readily-identifiable structs. We've been able to sign these firmware images for some time, but verifying the result generally required testing them on hardware. This CL adds some futilty support for recognizing and verifying those images too. It just tries various sig and hash algorithms, until it finds a combination for which the image is self-consistent (where the pubkey blob verifies the signature blob). BUG=none BRANCH=none TEST=make runtests This change also adds additional tests for usbpd1 images. We ensure that we correctly recognize and verify an MP-signed firmware, plus test signing and verifying usbpd1 images using multiple signature and hash algorithms. Change-Id: I4fbe8b37a694992f635d5469ae1c2449b1610dfd Signed-off-by: Bill Richardson <wfrichar@chromium.org> Reviewed-on: https://chromium-review.googlesource.com/302415 Reviewed-by: Randall Spangler <rspangler@chromium.org>
These are officially signed BIOS images from existing Chromebooks. bios_mario_mp.bin uses old names for the FMAP areas bios_zgb_mp.bin RW firmware A and B are different bios_link_mp.bin uses the RO_NORMAL flag to skip RW firmware validation bios_peppy_mp.bin doesn't do any of those things