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https://github.com/linuxboot/heads.git
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58 lines
1.7 KiB
Plaintext
58 lines
1.7 KiB
Plaintext
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#!/bin/bash
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set -e
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function usage() {
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echo -n \
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"Usage: $(basename "$0") path_to_output_directory
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Download Intel ME firmware from Lenovo, neutralize, and shrink.
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"
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}
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ME_BIN_HASH="b7cf4c0cf514bbf279d9fddb12c34fca5c1c23e94b000c26275369b924ab9c25"
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if [[ "${BASH_SOURCE[0]}" == "$0" ]]; then
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if [[ "${1:-}" == "--help" ]]; then
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usage
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else
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if [[ -z "${COREBOOT_DIR}" ]]; then
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echo "ERROR: No COREBOOT_DIR variable defined."
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exit 1
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fi
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output_dir="$(realpath "${1:-./}")"
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if [[ ! -f "${output_dir}/me.bin" ]]; then
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# Unpack Lenovo's Windows installer into a temporary directory and
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# extract the Intel ME blob.
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pushd "$(mktemp -d)"
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curl -O https://download.lenovo.com/pccbbs/mobiles/glrg22ww.exe
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innoextract glrg22ww.exe
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mv app/ME9.1_5M_Production.bin "${COREBOOT_DIR}/util/me_cleaner"
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popd
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# Neutralize and shrink Intel ME. Note that this doesn't include
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# --soft-disable to set the "ME Disable" or "ME Disable B" (e.g.,
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# High Assurance Program) bits, as they are defined within the Flash
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# Descriptor.
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# https://github.com/corna/me_cleaner/wiki/External-flashing#neutralize-and-shrink-intel-me-useful-only-for-coreboot
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pushd "${COREBOOT_DIR}/util/me_cleaner"
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python me_cleaner.py -r -t -O me_shrinked.bin ME9.1_5M_Production.bin
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mv me_shrinked.bin "${output_dir}/me.bin"
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rm ./*.bin
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popd
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fi
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if ! echo "${ME_BIN_HASH} ${output_dir}/me.bin" | sha256sum --check; then
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echo "ERROR: SHA256 checksum for me.bin doesn't match."
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exit 1
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fi
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fi
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fi
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