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{pkgs, ...}: {
# The encrypted USB is NOT part of boot anymore
# We do NOT use crypttab or systemd-cryptsetup units at all
fileSystems."/mnt/ssh-keys" = {
device = "/dev/mapper/ssh-keys";
fsType = "ext4";
# keep it fully manual/on-demand
options = ["noauto" "nofail"];
};
environment.systemPackages = with pkgs; [
cryptsetup
# 🔓 Mount + unlock + load SSH key
(writeShellScriptBin "keys-mount" ''
set -e
DEVICE="/dev/disk/by-uuid/da31e270-80d4-4a89-9633-87dd4d736ca2"
NAME="ssh-keys"
MNT="/mnt/ssh-keys"
echo "🔐 Unlocking encrypted USB..."
sudo cryptsetup open "$DEVICE" "$NAME"
echo "📂 Mounting..."
sudo mount "/dev/mapper/$NAME" "$MNT"
echo "🔑 Adding SSH key..."
ssh-add "$MNT/poseidon"
echo "✅ Done"
'')
# 🔒 Clean unmount + lock
(writeShellScriptBin "keys-umount" ''
set -e
MNT="/mnt/ssh-keys"
NAME="ssh-keys"
echo "🔑 Removing SSH key..."
ssh-add -d "$MNT/poseidon" 2>/dev/null || true
echo "📤 Unmounting..."
sudo umount "$MNT" || true
echo "🔒 Closing encrypted device..."
sudo cryptsetup close "$NAME" || true
echo "✅ Done"
'')
];
# Create mountpoint safely (but do NOT enforce permissions on contents)
systemd.tmpfiles.rules = [
"d /mnt/ssh-keys 0755 root root -"
];
}
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