54 lines
1.6 KiB
Nix
54 lines
1.6 KiB
Nix
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{ config, lib, pkgs, ... }:
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let
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consulCfg = config.services.consul.extraConfig;
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consulIpAddr = consulCfg.addresses.http or "127.0.0.1";
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consulHttpAddr = "${consulIpAddr}:${toString (consulCfg.ports.http or 8500)}";
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kvRoot = "secrets/locksmith";
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kvValue = "recipient/${config.networking.hostName}";
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in
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{
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systemd.tmpfiles.settings.locksmith = {
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"/run/locksmith".d = {
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mode = "0711";
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};
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};
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systemd.services.locksmith = {
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description = "The Locksmith's Chant";
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wantedBy = [ "multi-user.target" ];
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wants = [ "consul.service" ];
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after = [ "consul.service" ];
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chant.enable = true;
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path = [
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config.services.consul.package
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];
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environment = {
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CONSUL_HTTP_ADDR = consulHttpAddr;
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};
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serviceConfig = {
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PrivateTmp = true;
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WorkingDirectory = "/tmp";
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IPAddressDeny = [ "any" ];
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IPAddressAllow = [ consulIpAddr ];
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LoadCredential = lib.mkForce [];
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};
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script = ''
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consul kv get --keys ${kvRoot}/ | ${pkgs.gnused}/bin/sed 's,/$,,g' | while read secret; do
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out="$(mktemp -u /run/locksmith/.locksmith-secret.XXXXXXXXXXXXXXXX)"
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if [[ "$(consul kv get --keys "$secret/${kvValue}")" == "$secret/${kvValue}" ]]; then
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owner="$(consul kv get "$secret/owner")"
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group="$(consul kv get "$secret/group")"
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mode="$(consul kv get "$secret/mode")"
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consul kv get "$secret/${kvValue}" | ${pkgs.age}/bin/age --decrypt -i /etc/ssh/ssh_host_ed25519_key -o $out
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chown -v "$owner:$group" $out
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chmod -v "$mode" $out
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mv -v $out "/run/locksmith/$(basename "$secret")"
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fi
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done
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'';
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};
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}
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