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_targets: use metaelf to embedd integrity metadata #1070

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_targets: use metaelf to embedd integrity metadata #1070

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_targets: use metaelf to embedd integrity metadata 
`metaelf` is utilized to add integrity checksums to all apps and
the kernel if it is intended to load as an ELF file (using the
"kernel" command instead of "kernelimg" which is for binary image
of kernel) and only when `phoenix-host-utils/metaelf` is available
(e.g., i.MXRT) or in custom projects.

JIRA: RTOS-296
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Gerard Swiderski committed May 8, 2024
commit 5fa622837b04e5486af69d284b062648c2b69891
15 changes: 15 additions & 0 deletions _targets/build.common
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Original file line number Diff line number Diff line change
Expand Up @@ -191,6 +191,15 @@ b_add2img() {
}


b_signelf() {
# use metaelf to embed integrity checksum only when metaelf is available
if [ -f "$PREFIX_BUILD_HOST/prog.stripped/metaelf" ] && [[ "$1" != *.bin ]]; then
printf "Signing %s " "$1"
"$PREFIX_BUILD_HOST/prog.stripped/metaelf" -w "$1"
fi
}


b_prod_image() {
b_log "Creating production images"

Expand All @@ -217,10 +226,12 @@ b_prod_image() {

# Kernel
OFFSET="$KERNEL_OFFS"
b_signelf "${PREFIX_PROG_STRIPPED}$KERNEL_FILE"
b_add2img "${PREFIX_PROG_STRIPPED}$KERNEL_FILE" "$PHOENIX_DISK"

# Programs
for prog in "${PROGS[@]}"; do
b_signelf "${PREFIX_PROG_STRIPPED}$prog"
b_add2img "${PREFIX_PROG_STRIPPED}$prog" "$PHOENIX_DISK"
done

Expand All @@ -237,10 +248,12 @@ b_kernel_image() {
rm -f "$IMG"

OFFSET="$KERNEL_OFFS"
b_signelf "${PREFIX_PROG_STRIPPED}/$KERNEL_FILE"
b_add2img "${PREFIX_PROG_STRIPPED}/$KERNEL_FILE" "$IMG"

# Programs
for prog in "${PROGS[@]}"; do
b_signelf "${PREFIX_PROG_STRIPPED}$prog"
b_add2img "${PREFIX_PROG_STRIPPED}$prog" "$IMG"
done
}
Expand Down Expand Up @@ -286,10 +299,12 @@ b_dev_image() {
# Kernel
KERNEL_OFFS=$((KERNEL_OFFS - OFFS_USER_SCRIPT))
OFFSET="$KERNEL_OFFS"
b_signelf "${PREFIX_PROG_STRIPPED}/$KERNEL_FILE"
b_add2img "${PREFIX_PROG_STRIPPED}$KERNEL_FILE" "$PHOENIX_DEV_IMG"

# Programs
for prog in "${PROGS[@]}"; do
b_signelf "${PREFIX_PROG_STRIPPED}$prog"
b_add2img "${PREFIX_PROG_STRIPPED}$prog" "$PHOENIX_DEV_IMG"
done
}
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