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b4496c4443
This replaces a special-purpose python script with futility, to
sign the firmware for those boards that require a signed RW image
instead of using software sync.
Currently, the only boards that do that use a signature scheme
that is somewhat opaque (refer to commit b5a439241f in the
vboot_reference repo for details). Futility calls that scheme
"--type usbpd1".
BUG=chromium:231574
BRANCH=ToT
CQ-DEPEND=CL:*212135
TEST=manual
To test, I obtained a reworked zinger that could be connected to
servo. I first flashed it with a dev-key-signed RO+RW image built
prior to this CL, then I applied this change, built a new image
(with a minor change to the startup message), and updated only
the RW half from Samus using
ectool --name=cros_pd flashpd 0 1 /mnt/stateful_partition/ec.RW.bin
Watching the zinger console when plugging and unplugging, I
confirmed that the RO firmware was still the original and the
verified-by-RO RW firmware was the new version.
Note: I also had to build a custom AP kernel without the cros_pd
driver, to prevent interference with the manual update.
Change-Id: I22d8e75c85dab7701af8fe98287f14ebe77dbbd4
Signed-off-by: Bill Richardson <wfrichar@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/264508
Reviewed-by: Mike Frysinger <vapier@chromium.org>