mirror of
https://codeberg.org/libreboot/lbmk.git
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move resources/scripts/ to script/
Signed-off-by: Leah Rowe <leah@libreboot.org>
This commit is contained in:
Leah Rowe
Executable
+184
@@ -0,0 +1,184 @@
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#!/usr/bin/env sh
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# Download Intel MRC images
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#
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, version 2 of the License.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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#
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[ "x${DEBUG+set}" = 'xset' ] && set -v
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set -u -e
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. "include/err.sh"
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export PATH="${PATH}:/sbin"
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# This file is forked from util/chromeos/crosfirmware.sh in coreboot cfc26ce278
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# Changes to it in *this version* are copyright 2021 and 2023 Leah Rowe, under
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# the same license as above.
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# use updated manifest from wayback machine, when updating mrc.bin,
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# and update the other variables below accordingly. current manifest used:
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# https://web.archive.org/web/20210211071412/https://dl.google.com/dl/edgedl/chromeos/recovery/recovery.conf
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# the wayback machine is used so that we get the same manifest. google
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# does not seem to version the manifest, but archives are available
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# variables taken from that manifest:
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_board="peppy"
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_file="chromeos_12239.92.0_peppy_recovery_stable-channel_mp-v3.bin"
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_url="https://dl.google.com/dl/edgedl/chromeos/recovery/chromeos_12239.92.0_peppy_recovery_stable-channel_mp-v3.bin.zip"
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_url2="https://web.archive.org/web/20200516070928/https://dl.google.com/dl/edgedl/chromeos/recovery/chromeos_12239.92.0_peppy_recovery_stable-channel_mp-v3.bin.zip"
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_sha1sum="cd5917cbe7f821ad769bf0fd87046898f9e175c8"
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_mrc_complete_hash="d18de1e3d52c0815b82ea406ca07897c56c65696"
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_mrc_complete="mrc/haswell/mrc.bin"
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cbdir="coreboot/default"
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cbfstool="cbutils/default/cbfstool"
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sname=""
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main()
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{
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sname=${0}
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printf "Downloading Intel MRC blobs\n"
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check_existing || return 0
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build_dependencies
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fetch_mrc || err "could not fetch mrc.bin"
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}
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check_existing()
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{
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[ -f "${_mrc_complete}" ] || \
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return 0
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printf 'found existing mrc.bin\n'
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[ "$(sha1sum "${_mrc_complete}" | awk '{print $1}')" \
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= "${_mrc_complete_hash}" ] && \
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return 1
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printf 'hashes did not match, starting over\n'
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}
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build_dependencies()
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{
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[ -d "${cbdir}/" ] || ./fetch_trees coreboot default || \
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err "build_dependencies: cannot fetch coreboot/default"
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./build coreboot utils default || \
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err "build_dependencies: cannot build cbutils/default"
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}
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fetch_mrc()
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{
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mkdir -p mrc/haswell/ || err "fetch_mrc: !mkdir mrc/haswell"
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(
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cd mrc/haswell/ || err "fetch_mrc: !cd mrc/haswell"
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download_image "${_url}" "${_file}" "${_sha1sum}"
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[ -f ${_file} ] || \
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download_image "${_url2}" "${_file}" "${_sha1sum}"
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[ -f $_file ] || \
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err "fetch_mrc: ${_file} not downloaded / verification failed."
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extract_partition ROOT-A "${_file}" root-a.ext2
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extract_shellball root-a.ext2 chromeos-firmwareupdate-${_board}
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extract_coreboot chromeos-firmwareupdate-${_board}
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../../"${cbfstool}" coreboot-*.bin extract -f mrc.bin -n mrc.bin \
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-r RO_SECTION || err "fetch_mrc: could not fetch mrc.bin"
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rm -f "chromeos-firmwareupdate-${_board}" coreboot-*.bin \
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"${_file}" "root-a.ext2" || err "fetch_mrc: cannot remove files"
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printf "\n\nmrc.bin saved to ${_mrc_complete}\n\n"
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)
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}
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download_image()
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{
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url=${1}
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_file=${2}
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_sha1sum=${3}
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printf "Downloading recovery image\n"
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curl "$url" > "$_file.zip" || err "download_image: curl failed"
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printf "Verifying recovery image checksum\n"
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if [ "$(sha1sum "${_file}.zip" | awk '{print $1}')" = "${_sha1sum}" ]
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then
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unzip -q "${_file}.zip" || err "download_image: cannot unzip"
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rm -f "${_file}.zip" || err "download_image: can't rm zip {1}"
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return 0
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fi
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rm -f "${_file}.zip" || err "download_image: bad hash, and can't rm zip"
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err "download_image: Bad checksum. Recovery image deleted"
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}
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extract_partition()
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{
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NAME=${1}
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FILE=${2}
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ROOTFS=${3}
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_bs=1024
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printf "Extracting ROOT-A partition\n"
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ROOTP=$( printf "unit\nB\nprint\nquit\n" | \
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parted "${FILE}" 2>/dev/null | grep "${NAME}" )
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START=$(( $( echo ${ROOTP} | cut -f2 -d\ | tr -d "B" ) ))
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SIZE=$(( $( echo ${ROOTP} | cut -f4 -d\ | tr -d "B" ) ))
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dd if="${FILE}" of="${ROOTFS}" bs=${_bs} skip=$(( ${START} / ${_bs} )) \
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count=$(( ${SIZE} / ${_bs} )) || \
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err "extract_partition: can't extract root file system"
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}
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extract_shellball()
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{
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ROOTFS=${1}
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SHELLBALL=${2}
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printf "Extracting chromeos-firmwareupdate\n"
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printf "cd /usr/sbin\ndump chromeos-firmwareupdate ${SHELLBALL}\nquit" \
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| debugfs "${ROOTFS}" || err "extract_shellball: debugfs"
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}
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extract_coreboot()
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{
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_shellball=${1}
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_unpacked=$( mktemp -d )
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printf "Extracting coreboot image\n"
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[ -f "${_shellball}" ] || \
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err "extract_coreboot: shellball missing in google peppy image"
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sh "${_shellball}" --unpack "${_unpacked}" || \
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err "extract_coreboot: shellball exits with non-zero status"
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# TODO: audit the f* out of that shellball, for each mrc version.
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# it has to be updated for each mrc update. we should ideally
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# implement the functionality ourselves.
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[ -f "${_unpacked}/VERSION" ] || \
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err "extract_coreboot: VERSION file missing on google coreboot rom"
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_version=$( cat "${_unpacked}/VERSION" | grep BIOS\ version: | \
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cut -f2 -d: | tr -d \ )
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cp "${_unpacked}/bios.bin" "coreboot-${_version}.bin" || \
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err "extract_coreboot: cannot copy google peppy rom"
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rm -Rf "${_unpacked}" || \
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err "extract_coreboot: cannot remove extracted google peppy archive"
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}
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main $@
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