60 lines
1.4 KiB
Shell
60 lines
1.4 KiB
Shell
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#!/bin/sh
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# Generate security.txt (RFC 9116), clearsigned with the [S] subkey
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#
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# Usage: ./scripts/security-txt.sh
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#
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# Expires is read from the key, so the January ceremony only re-runs this
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# after the key's expiry was extended
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set -eu
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# Internal [S] subkey; pinned with "!" below so `gpg` never picks another subkey
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SIGNING_KEY='D6D1989DF1F6B23FD776293DB46EDB4DFC26805D'
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REPO=$(cd "$(dirname "$0")/.." && pwd)
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OUT="$REPO/security.txt"
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# Notes:
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# - the 7th field of the pub line is the primary key's expiry in epoch seconds
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# - a subkey resolves to the primary key
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EPOCH=$(gpg --list-keys --with-colons "$SIGNING_KEY" \
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| awk -F: '$1 == "pub" { print $7; exit }')
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if [ -z "$EPOCH" ]; then
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echo "Error: No expiry found for key $SIGNING_KEY" >&2
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exit 1
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fi
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EXPIRES=$(date -u -d "@$EPOCH" +%Y-%m-%dT%H:%M:%SZ)
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UNSIGNED=$(mktemp)
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trap 'rm -f "$UNSIGNED"' EXIT
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cat > "$UNSIGNED" <<EOT
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Canonical: https://www.alexander-hess.com/.well-known/security.txt
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Canonical: https://www.webartifex.de/.well-known/security.txt
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Contact: mailto:ah@alexander-hess.com
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Contact: mailto:alexander@webartifex.de
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Encryption: https://www.alexander-hess.com/public-key.asc
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Encryption: https://www.webartifex.de/public-key.asc
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Expires: $EXPIRES
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Preferred-Languages: en, de
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EOT
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gpg \
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--clearsign \
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--digest-algo SHA512 \
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--local-user "${SIGNING_KEY}!" \
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--yes \
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--output "$OUT" \
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"$UNSIGNED"
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gpg --verify "$OUT"
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echo "Wrote security.txt (Expires: $EXPIRES)"
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