With this script, a public key is added to a device tree blob as the default efi_get_public_key_data() expects.
Signed-off-by: AKASHI Takahiro takahiro.akashi@linaro.org --- MAINTAINERS | 1 + tools/fdtsig.sh | 40 ++++++++++++++++++++++++++++++++++++++++ 2 files changed, 41 insertions(+) create mode 100755 tools/fdtsig.sh
diff --git a/MAINTAINERS b/MAINTAINERS index 569332db4719..860f58ef6640 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -738,6 +738,7 @@ F: cmd/bootefi.c F: cmd/efidebug.c F: cmd/nvedit_efi.c F: tools/efivar.py +F: tools/fdtsig.sh F: tools/file2include.c F: tools/mkeficapsule.c
diff --git a/tools/fdtsig.sh b/tools/fdtsig.sh new file mode 100755 index 000000000000..c2b2a6dc5ec8 --- /dev/null +++ b/tools/fdtsig.sh @@ -0,0 +1,40 @@ +#!/bin/sh +# SPDX-License-Identifier: GPL-2.0+ +# +# script to add a certificate (efi-signature-list) to dtb blob + +usage() { + if [ -n "$*" ]; then + echo "ERROR: $*" + fi + echo "Usage: "$(basename $0) " <esl file> <dtb file>" +} + +if [ "$#" -ne 2 ]; then + usage "Arguments missing" + exit 1 +fi + +ESL=$1 +DTB=$2 +NEW_DTB=$(basename $DTB)_tmp +SIG=signature + +cat << 'EOF' > $SIG.dts +/dts-v1/; +/plugin/; + +&{/} { + signature { +EOF +echo "capsule-key = /incbin/("$ESL");" >> $SIG.dts +cat << 'EOF' >> $SIG.dts + }; +}; +EOF + +dtc -@ -I dts -O dtb -o $SIG.dtbo $SIG.dts +fdtoverlay -i $DTB -o $NEW_DTB $SIG.dtbo +mv $NEW_DTB $DTB + +rm $SIG.dts $SIG.dtsn $SIG.dtbo