kernel/SOURCES/mod-sign.sh

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#! /bin/bash
# The modules_sign target checks for corresponding .o files for every .ko that
# is signed. This doesn't work for package builds which re-use the same build
# directory for every variant, and the .config may change between variants.
# So instead of using this script to just sign lib/modules/$KernelVer/extra,
# sign all .ko in the buildroot.
# This essentially duplicates the 'modules_sign' Kbuild target and runs the
# same commands for those modules.
MODSECKEY=$1
MODPUBKEY=$2
moddir=$3
modules=$(find "$moddir" -type f -name '*.ko')
NPROC=$(nproc)
[ -z "$NPROC" ] && NPROC=1
# NB: this loop runs 2000+ iterations. Try to be fast.
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echo "$modules" | xargs -r -n16 -P "$NPROC" sh -c "
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for mod; do
./scripts/sign-file sha256 $MODSECKEY $MODPUBKEY \$mod
rm -f \$mod.sig \$mod.dig
done
" DUMMYARG0 # xargs appends ARG1 ARG2..., which go into $mod in for loop.
RANDOMMOD=$(echo "$modules" | sort -R | head -n 1)
if [ "~Module signature appended~" != "$(tail -c 28 "$RANDOMMOD")" ]; then
echo "*****************************"
echo "*** Modules are unsigned! ***"
echo "*****************************"
exit 1
fi
exit 0