133 lines
3.7 KiB
Nix
Executable File
133 lines
3.7 KiB
Nix
Executable File
{ pkgs, config, lib, inputs, ... }:
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with lib;
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with types;
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let
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secret = { name, ... }: {
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options = {
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encrypted = mkOption {
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type = path;
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default = "/home/balsoft/.password-store/${name}.gpg";
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};
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decrypted = mkOption {
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type = path;
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default = "/var/secrets/${name}";
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};
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decrypt = mkOption {
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default = pkgs.writeShellScript "gpg-decrypt" ''
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set -euo pipefail
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export GPG_TTY="$(tty)"
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${pkgs.gnupg}/bin/gpg-connect-agent updatestartuptty /bye 1>&2
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${pkgs.gnupg}/bin/gpg --batch --no-tty --decrypt
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'';
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};
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user = mkOption {
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type = str;
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default = "balsoft";
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};
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owner = mkOption {
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type = str;
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default = "root:root";
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};
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permissions = mkOption {
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type = lib.types.addCheck lib.types.str
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(perm: !isNull (builtins.match "[0-7]{3}" perm));
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default = "400";
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};
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services = mkOption {
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type = listOf str;
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default = [ "${name}" ];
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};
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__toString = mkOption {
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readOnly = true;
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default = s: s.decrypted;
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};
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};
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};
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decrypt = name: cfg:
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with cfg; {
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"${name}-secrets" = rec {
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requires = [ "user@1000.service" ];
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after = requires;
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preStart = ''
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stat '${encrypted}'
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mkdir -p '${builtins.dirOf decrypted}'
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'';
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script = ''
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if cat '${encrypted}' | /run/wrappers/bin/sudo -u ${user} ${cfg.decrypt} > '${decrypted}.tmp'; then
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mv -f '${decrypted}.tmp' '${decrypted}'
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chown '${owner}' '${decrypted}'
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chmod '${permissions}' '${decrypted}'
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else
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echo "Failed to decrypt the secret"
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rm '${decrypted}.tmp'
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exit 1
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fi
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'';
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serviceConfig = {
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Type = "oneshot";
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RemainAfterExit = "yes";
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};
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};
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};
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addDependencies = name: cfg:
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with cfg;
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genAttrs services (service: rec {
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requires = [ "${name}-secrets.service" ];
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after = requires;
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bindsTo = requires;
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});
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mkServices = name: cfg: [ (decrypt name cfg) (addDependencies name cfg) ];
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allServices = toString (map (name: "${name}-envsubst.service")
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(builtins.attrNames config.secrets-envsubst)
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++ map (name: "${name}-secrets.service")
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(builtins.attrNames config.secrets));
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in {
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options.secrets = lib.mkOption {
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type = attrsOf (submodule secret);
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default = { };
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};
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config.systemd.services =
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mkMerge (concatLists (mapAttrsToList mkServices config.secrets));
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config.environment.systemPackages = [
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(pkgs.writeShellScriptBin "activate-secrets" ''
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set -euo pipefail
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# Make sure card is available and unlocked
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echo fetch | gpg --card-edit --no-tty --command-fd=0
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${pkgs.gnupg}/bin/gpg --card-status
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if [ -d "$HOME/.password-store" ]; then
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cd "$HOME/.password-store"; ${pkgs.git}/bin/git pull
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else
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${pkgs.git}/bin/git clone ssh://git@github.com/balsoft/pass "$HOME/.password-store"
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fi
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ln -sf ${
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pkgs.writeShellScript "push" "${pkgs.git}/bin/git push origin master"
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} "$HOME/.password-store/.git/hooks/post-commit"
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cat $HOME/.password-store/email/balsoft@balsoft.ru.gpg | ${pkgs.gnupg}/bin/gpg --decrypt > /dev/null
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sudo systemctl restart ${allServices}
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'')
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];
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config.security.sudo.extraRules = [{
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users = [ "balsoft" ];
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commands = [{
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command = "/run/current-system/sw/bin/systemctl restart ${allServices}";
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options = [ "NOPASSWD" ];
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}];
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}];
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config.home-manager.users.balsoft = {
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wayland.windowManager.sway = {
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config.startup = [{ command = "activate-secrets"; }];
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};
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};
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}
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