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45 lines
1.5 KiB
Bash
Executable file
45 lines
1.5 KiB
Bash
Executable file
#!/usr/bin/env bash
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# Generate an Ed25519 keypair for firmware signing.
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#
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# Output:
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# firmware-signing.key (private, PKCS8 PEM, 0600)
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# firmware-signing.pub (public, SPKI PEM, 0644)
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#
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# Use cases:
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# 1. Local dev: drop the .key into the server's dataDir
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# (/var/lib/betterframe/firmware-signing.key) — server picks it up on
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# next boot. The server auto-generates one if missing, this script is
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# only needed when you want a reproducible / shared key.
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# 2. Cloud deploy: paste the .key content into the
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# BF_FIRMWARE_SIGNING_KEY env var on your hosting platform (Coolify,
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# k8s secret, GitHub Actions secret, etc.). The server detects the env
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# var and prefers it over the on-disk file.
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#
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# Pinning on kiosks: the public key gets shipped to kiosks via the
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# /api/kiosk/firmware/check response — no manual distribution needed.
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set -euo pipefail
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OUT_DIR="${1:-.}"
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mkdir -p "$OUT_DIR"
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priv="$OUT_DIR/firmware-signing.key"
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pub="$OUT_DIR/firmware-signing.pub"
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if [ -e "$priv" ] || [ -e "$pub" ]; then
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echo "error: $priv or $pub already exists. Refusing to overwrite." >&2
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exit 1
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fi
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openssl genpkey -algorithm Ed25519 -out "$priv"
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chmod 600 "$priv"
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openssl pkey -in "$priv" -pubout -out "$pub"
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chmod 644 "$pub"
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echo "wrote: $priv"
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echo "wrote: $pub"
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echo
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echo "To use in cloud:"
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echo " set BF_FIRMWARE_SIGNING_KEY environment variable to the contents of $priv"
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echo
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echo "To use locally:"
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echo " install $priv to /var/lib/betterframe/firmware-signing.key (mode 0600)"
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