43 lines
942 B
Bash
Executable file
43 lines
942 B
Bash
Executable file
#!/bin/bash
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set -euo pipefail
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# Needs to run as root to get all hashes
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[ $(id -u) -eq 0 ] || exec sudo $0 "$@"
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# Read command from CLI
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cmd=${1:-verify}
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KEY=${KEY:-6A64A47A}
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signature_file=/boot/files.sig
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case "${cmd}" in
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# Create a new signature file
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sign)
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find /boot -type f -! -name 'files.sig' -! -name 'files.sha512' -exec sha512sum '{}' \; >/boot/files.sha512
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gpg --output ${signature_file} --detach-sign /boot/files.sha512
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;;
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# Verify signature file
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verify)
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[ -f ${signature_file} ] || {
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echo "Signature file not yet initialized. Use '$0 sign'"
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exit 1
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}
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find /boot -type f -! -name 'files.sig' -! -name 'files.sha512' -exec sha512sum '{}' \; >/tmp/files.sha512
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gpg --verify ${signature_file} /tmp/files.sha512 || {
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echo
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echo '/!\ ATTENTION: SIGNATURE MISMATCH! /!\'
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echo
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diff -wu /boot/files.sha512 /tmp/files.sha512
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exit 1
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}
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;;
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*)
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echo "Unsupported command '${cmd}': $0 <sign|verify>"
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exit 1
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;;
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esac
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