diff options
Diffstat (limited to 'nixos/modules/services/misc/sssd.nix')
-rw-r--r-- | nixos/modules/services/misc/sssd.nix | 97 |
1 files changed, 97 insertions, 0 deletions
diff --git a/nixos/modules/services/misc/sssd.nix b/nixos/modules/services/misc/sssd.nix new file mode 100644 index 00000000000..386281e2b7c --- /dev/null +++ b/nixos/modules/services/misc/sssd.nix @@ -0,0 +1,97 @@ +{ config, lib, pkgs, ... }: +with lib; +let + cfg = config.services.sssd; + nscd = config.services.nscd; +in { + options = { + services.sssd = { + enable = mkEnableOption "the System Security Services Daemon"; + + config = mkOption { + type = types.lines; + description = "Contents of <filename>sssd.conf</filename>."; + default = '' + [sssd] + config_file_version = 2 + services = nss, pam + domains = shadowutils + + [nss] + + [pam] + + [domain/shadowutils] + id_provider = proxy + proxy_lib_name = files + auth_provider = proxy + proxy_pam_target = sssd-shadowutils + proxy_fast_alias = True + ''; + }; + + sshAuthorizedKeysIntegration = mkOption { + type = types.bool; + default = false; + description = '' + Whether to make sshd look up authorized keys from SSS. + For this to work, the <literal>ssh</literal> SSS service must be enabled in the sssd configuration. + ''; + }; + }; + }; + config = mkMerge [ + (mkIf cfg.enable { + systemd.services.sssd = { + description = "System Security Services Daemon"; + wantedBy = [ "multi-user.target" ]; + before = [ "systemd-user-sessions.service" "nss-user-lookup.target" ]; + after = [ "network-online.target" "nscd.service" ]; + requires = [ "network-online.target" "nscd.service" ]; + wants = [ "nss-user-lookup.target" ]; + restartTriggers = [ + config.environment.etc."nscd.conf".source + config.environment.etc."sssd/sssd.conf".source + ]; + script = '' + export LDB_MODULES_PATH+="''${LDB_MODULES_PATH+:}${pkgs.ldb}/modules/ldb:${pkgs.sssd}/modules/ldb" + mkdir -p /var/lib/sss/{pubconf,db,mc,pipes,gpo_cache,secrets} /var/lib/sss/pipes/private /var/lib/sss/pubconf/krb5.include.d + ${pkgs.sssd}/bin/sssd -D + ''; + serviceConfig = { + Type = "forking"; + PIDFile = "/run/sssd.pid"; + }; + }; + + environment.etc."sssd/sssd.conf" = { + text = cfg.config; + mode = "0400"; + }; + + system.nssModules = [ pkgs.sssd ]; + system.nssDatabases = { + group = [ "sss" ]; + passwd = [ "sss" ]; + services = [ "sss" ]; + shadow = [ "sss" ]; + }; + services.dbus.packages = [ pkgs.sssd ]; + }) + + (mkIf cfg.sshAuthorizedKeysIntegration { + # Ugly: sshd refuses to start if a store path is given because /nix/store is group-writable. + # So indirect by a symlink. + environment.etc."ssh/authorized_keys_command" = { + mode = "0755"; + text = '' + #!/bin/sh + exec ${pkgs.sssd}/bin/sss_ssh_authorizedkeys "$@" + ''; + }; + services.openssh.authorizedKeysCommand = "/etc/ssh/authorized_keys_command"; + services.openssh.authorizedKeysCommandUser = "nobody"; + })]; + + meta.maintainers = with maintainers; [ bbigras ]; +} |