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44742a43 IB |
1 | { lib, pkgs, config, myconfig, mylibs, ... }: |
2 | { | |
3 | options.mySecrets = { | |
4 | keys = lib.mkOption { | |
5 | type = lib.types.listOf lib.types.unspecified; | |
6 | default = {}; | |
7 | description = "Keys to upload to server"; | |
8 | }; | |
9 | }; | |
10 | config = let | |
44742a43 IB |
11 | keys = config.mySecrets.keys; |
12 | empty = pkgs.runCommand "empty" { preferLocalBuild = true; } "mkdir -p $out && touch $out/done"; | |
44742a43 IB |
13 | dumpKey = v: '' |
14 | mkdir -p secrets/$(dirname ${v.dest}) | |
15 | echo -n ${lib.strings.escapeShellArg v.text} > secrets/${v.dest} | |
16 | cat >> mods <<EOF | |
17 | ${v.user or "root"} ${v.group or "root"} ${v.permissions or "0600"} secrets/${v.dest} | |
18 | EOF | |
19 | ''; | |
20 | secrets = pkgs.runCommand "secrets.tar" {} '' | |
21 | touch mods | |
22 | tar --format=ustar --mtime='1970-01-01' -P --transform="s@${empty}@secrets@" -cf $out ${empty}/done | |
44742a43 IB |
23 | ${builtins.concatStringsSep "\n" (map dumpKey keys)} |
24 | cat mods | while read u g p k; do | |
25 | tar --format=ustar --mtime='1970-01-01' --owner="$u" --group="$g" --mode="$p" --append -f $out "$k" | |
26 | done | |
27 | ''; | |
28 | in { | |
29 | system.activationScripts.secrets = { | |
30 | deps = [ "users" "wrappers" ]; | |
31 | text = '' | |
32 | install -m0750 -o root -g keys -d /var/secrets | |
33 | if [ -f /run/keys/secrets.tar ]; then | |
34 | if [ ! -f /var/secrets/currentSecrets ] || ! sha512sum -c --status "/var/secrets/currentSecrets"; then | |
35 | echo "rebuilding secrets" | |
36 | rm -rf /var/secrets | |
37 | install -m0750 -o root -g keys -d /var/secrets | |
38 | ${pkgs.gnutar}/bin/tar --strip-components 1 -C /var/secrets -xf /run/keys/secrets.tar | |
39 | sha512sum /run/keys/secrets.tar > /var/secrets/currentSecrets | |
40 | find /var/secrets -type d -exec chown root:keys {} \; -exec chmod o-rx {} \; | |
41 | fi | |
42 | fi | |
43 | ''; | |
44 | }; | |
45 | deployment.keys."secrets.tar" = { | |
46 | permissions = "0400"; | |
47 | # keyFile below is not evaluated at build time by nixops, so the | |
48 | # `secrets` path doesn’t necessarily exist when uploading the | |
49 | # keys, and nixops is unhappy. | |
50 | user = "root${builtins.substring 10000 1 secrets}"; | |
51 | group = "root"; | |
52 | keyFile = "${secrets}"; | |
53 | }; | |
54 | }; | |
55 | } |