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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 "$NPROC" ] && NPROC=1
# NB: this loop runs 2000+ iterations. Try to be fast.
echo "$modules" | xargs -r -n16 -P $NPROC sh -c "
for mod; do
module_basename=\${mod:0:-3}
module_suffix=\${mod: -3}
if [[ "\$module_suffix" == ".xz" ]]; then
unxz \$mod
./scripts/sign-file sha256 $MODSECKEY $MODPUBKEY \$module_basename
xz -f \$module_basename
elif [[ "\$module_suffix" == ".gz" ]]; then
gunzip \$mod
./scripts/sign-file sha256 $MODSECKEY $MODPUBKEY \$module_basename
gzip -9f \$module_basename
else
./scripts/sign-file sha256 $MODSECKEY $MODPUBKEY \$mod
fi
rm -f \$module_basename.sig \$module_basename.dig
done
" DUMMYARG0 # xargs appends ARG1 ARG2..., which go into $mod in for loop.
RANDOMMOD=$(echo "$modules" | sort -R | head -n 1)
rand_module_basename=${RANDOMMOD:0:-3}
rand_module_suffix=${RANDOMMOD: -3}
if [[ "$rand_module_suffix" == ".xz" ]]; then
unxz $RANDOMMOD
elif [[ "$rand_module_suffix" == ".gz" ]]; then
gunzip $RANDOMMOD
else
rand_module_basename=$RANDOMMOD
fi
if [ "~Module signature appended~" != "$(tail -c 28 "$rand_module_basename")" ]; then
echo "*****************************"
echo "*** Modules are unsigned! ***"
echo "*****************************"
exit 1
fi
if [[ "$rand_module_suffix" == ".xz" ]]; then
xz -f $rand_module_basename
elif [[ "$rand_module_suffix" == ".gz" ]]; then
gzip -9f $rand_module_basename
else
true
fi
exit 0