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#!/usr/bin/env sh
# SPDX-FileCopyrightText: 2022 Caleb La Grange <thonkpeasant@protonmail.com>
# SPDX-FileCopyrightText: 2022 Ferass El Hafidi <vitali64pmemail@protonmail.com>
# SPDX-FileCopyrightText: 2023 Leah Rowe <info@minifree.org>
# SPDX-License-Identifier: GPL-3.0-only
_7ztest="a"
mecleaner="$(pwd)/me_cleaner/me_cleaner.py"
me7updateparser="$(pwd)/resources/blobs/me7_update_parser.py"
board="${1}"
# A shorthand for each board, to avoid duplicating configs per flash size
board_short=${board%%_*mb}
set -- "resources/coreboot/${board}/config/*"
. ${1} 2>/dev/null
. "resources/coreboot/${board}/board.cfg"
if [ "${CONFIG_HAVE_MRC}" = "y" ]; then
printf 'haswell board detected, downloading mrc\n'
needs="${needs} MRC"
fi
if [ "${CONFIG_HAVE_IFD_BIN}" = "y" ]; then
printf 'board needs intel firmware descriptor\n'
needs="${needs} IFD"
fi
if [ "${CONFIG_HAVE_ME_BIN}" = "y" ]; then
printf 'board needs intel management engine\n'
needs="${needs} ME"
fi
if [ "${CONFIG_HAVE_GBE_BIN}" = "y" ]; then
printf 'board needs gigabit ethernet firmware\n'
needs="${needs} GBE"
fi
# Quickly exit without wasting more time if there are no blobs needed (GM45)
if [ -z ${needs+x} ]; then
printf 'No binary blobs needed for this board\n'
exit 0
fi
while read -r line ; do
case ${line} in
DL_hash*)
set ${line}
dl_hash=${2}
;;
DL_url*)
set ${line}
dl_url=${2}
;;
DL_url_bkup*)
set ${line}
dl_url_bkup=${2}
;;
esac
done << EOF
$(eval "awk ' /\{.*${board_short}.*}{/ {flag=1;next} /\}/{flag=0} flag { print }' resources/blobs/sources")
EOF
Main() {
Build_deps
Download_needed
}
Fail(){
printf "\nERROR: $@\n"
exit 1
}
Build_deps(){
if [ ! -d me_cleaner ]; then
printf "downloading me_cleaner\n"
./download me_cleaner || Fail 'could not download me_cleaner'
fi
if [ ! -d coreboot/default ]; then
printf "downloading coreboot\n"
./download coreboot default || Fail 'could not download coreboot'
fi
if [ ! -f "coreboot/default/util/ifdtool/ifdtool" ]; then
printf "building ifdtool from coreboot\n"
make -C coreboot/default/util/ifdtool || Fail 'could not build ifdtool'
fi
}
Download_needed(){
for need in ${needs}; do
case ${need} in
*ME*)
Download_me || _failed="${_failed} me"
;;
*MRC*)
./download mrc || _failed="${_failed} mrc"
;;
esac
done
if [ ! -z ${_failed+x} ]; then
Fail "failed to obtain ${_failed}\nYou may try manually extracting blobs with './blobutil extract'"
fi
}
Download_me() {
printf "Downloading neutered ME for board: `%s`\n" ${board}
Fetch_update || return 1
Extract_me || return 1
return 0
}
Fetch_update() {
printf "Fetching vendor update for board: `%s`\n" ${board}
if [ -z "${dl_url+x}" ]; then
printf "No vendor update specified for board: `%s`\n" ${board}
return 1
fi
Vendor_checksum blobs/me.exe || \
curl ${dl_url} > blobs/me.exe || curl ${dl_url_bkup} > blobs/me.exe
Vendor_checksum blobs/me.exe || Fail \
"Cannot guarantee intergity of vendor update for board: `${board}`"
return 0
}
Vendor_checksum() {
if [ ! -f "blobs/me.exe" ]; then
printf "Vendor update not found on disk for board: `%s`\n" ${board}
return 1
fi
if [ "$(sha1sum blobs/me.exe | awk '{print $1}')" != "${dl_hash}" ]; then
printf "Bad checksum on vendor update for board: `%s`\n" ${board}
rm blobs/me.exe
return 1
fi
return 0
}
Extract_me(){
printf "Extracting neutered ME for ${board}\n"
_me_destination=${CONFIG_ME_BIN_PATH#../../}
if [ ! -d "${_me_destination%/*}" ]; then
mkdir -p ${_me_destination%/*}
fi
if [ -d "blobs/app" ]; then
rm -r blobs/app
fi
if [ -f "${_me_destination}" ]; then
printf 'me already downloaded\n'
return 0
fi
printf 'extracting and stripping intel management engine\n'
innoextract blobs/me.exe -d blobs \
|| 7z x blobs/me.exe -oblobs/app \
|| Fail 'could not extract me executable with innoextract'
Bruteforce_extract_me "$(pwd)/${_me_destination}" "$(pwd)/blobs/app" \
|| return 1
printf "Truncated and cleaned me output to ${_me_destination}\n"
return 0
}
# cursed, carcinogenic code. TODO rewrite it better
Bruteforce_extract_me() {
_me_destination="${1}"
cdir="${2}" # must be an absolute path, not relative
if [ -f "${_me_destination}" ]; then
return 0
fi
(
printf "Entering %s\n" "${cdir}"
cd "${cdir}" || exit 1
for i in *; do
if [ -f "${_me_destination}" ]; then
# me.bin found, so avoid needless further traversal
break
elif [ -L "${i}" ]; then
# symlinks are a security risk, in this context
continue
elif [ -f "${i}" ]; then
"${mecleaner}" -r -t -O "${_me_destination}" "${i}" \
&& break # (we found me.bin)
"${me7updateparser}" -O ${_me_destination} "${i}" \
&& break
_7ztest="${_7ztest}a"
7z x "${i}" -o${_7ztest} || continue
Bruteforce_extract_me "${_me_destination}" "${cdir}/${_7ztest}"
cdir="${1}"
cd "${cdir}"
elif [ -d "$i" ]; then
Bruteforce_extract_me "${_me_destination}" "${cdir}/${i}"
cdir="${1}"
cd "${cdir}"
else
printf "SKIPPING: %s\n" "${i}"
fi
done
)
if [ ! -f "${_me_destination}" ]; then
printf "me.bin not found in vendor update for board: `%s`\n" ${board}
return 1
else
return 0
fi
}
Main
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