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|
{ pkgs, config, lib, ... }:
with lib;
let
cfg = config.secrets;
secret = types.submodule {
options = {
source = mkOption {
type = types.path;
description = "local secret path";
};
dest = mkOption {
type = types.str;
description = "where to write the decrypted secret to";
};
owner = mkOption {
default = "root";
type = types.str;
description = "who should own the secret";
};
group = mkOption {
default = "root";
type = types.str;
description = "what group should own the secret";
};
permissions = mkOption {
default = "0400";
type = types.str;
description = "Permissions expressed as octal.";
};
};
};
# metadata = lib.importTOML ../../ops/metadata/hosts.toml;
mkSecretOnDisk = name:
{ source, ... }:
pkgs.stdenv.mkDerivation {
name = "${name}-secret";
phases = "installPhase";
buildInputs = [ pkgs.rage ];
installPhase = ''
rage -a -r '${config.pubKey}' -o "$out" '${source}'
'';
};
mkService = name:
{ source, dest, owner, group, permissions, ... }: {
description = "decrypt secret for ${name}";
wantedBy = [ "multi-user.target" ];
serviceConfig.Type = "oneshot";
script = with pkgs; ''
rm -rf ${dest}
mkdir -p ${dirOf dest}
"${rage}"/bin/rage -d -i /etc/ssh/ssh_host_ed25519_key -o '${dest}' '${
mkSecretOnDisk name { inherit source; }
}'
chown '${owner}':'${group}' '${dest}'
chmod '${permissions}' '${dest}'
'';
};
in {
options = {
pubKey = mkOption {
type = types.str;
description = "host public key used for encrypting secrets";
};
secrets = mkOption {
type = types.attrsOf secret;
description = "secret configuration";
default = { };
};
};
config.systemd.services = let
units = mapAttrs' (name: info: {
name = "${name}-key";
value = (mkService name info);
}) cfg;
in units;
}
|
