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Use futility to re-sign standalone accessory firmware images either the former "usbpd1" used by USB Power Delivery firmware generated from the EC codebase or the new "rwsig" format. BRANCH=smaug, samus BUG=chrome-os-partner:46635 TEST=manual: openssl genrsa -F4 -out key_zinger.pem 2048 openssl genrsa -F4 -out key_hadoken.pem 2048 futility create --desc="Hadoken fake MP key" key_hadoken.pem key_hadoken ./scripts/image_signing/sign_official_build.sh accessory_usbpd build/zinger/ec.bin . build/zinger/ec.SIGNED.bin ./scripts/image_signing/sign_official_build.sh accessory_rwsig build/hadoken/keyboard_app.bin . build/hadoken/keyboard_app.SIGNED.bin and compare the re-signed files with the original files. Change-Id: I586ba3e4349929782e734af1590f394824e7dd44 Reviewed-on: https://chromium-review.googlesource.com/306795 Commit-Ready: Vincent Palatin <vpalatin@chromium.org> Tested-by: Vincent Palatin <vpalatin@chromium.org> Reviewed-by: Bill Richardson <wfrichar@chromium.org>