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68 lines
2.0 KiB
68 lines
2.0 KiB
{ config, lib, pkgs, ... }:
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with lib;
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let
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cfg = config.security.googleOsLogin;
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package = pkgs.google-compute-engine-oslogin;
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in
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{
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options = {
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security.googleOsLogin.enable = mkOption {
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type = types.bool;
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default = false;
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description = ''
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Whether to enable Google OS Login
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The OS Login package enables the following components:
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AuthorizedKeysCommand to query valid SSH keys from the user's OS Login
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profile during ssh authentication phase.
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NSS Module to provide user and group information
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PAM Module for the sshd service, providing authorization and
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authentication support, allowing the system to use data stored in
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Google Cloud IAM permissions to control both, the ability to log into
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an instance, and to perform operations as root (sudo).
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'';
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};
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};
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config = mkIf cfg.enable {
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security.pam.services.sshd = {
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makeHomeDir = true;
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googleOsLoginAccountVerification = true;
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# disabled for now: googleOsLoginAuthentication = true;
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};
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security.sudo.extraConfig = ''
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#includedir /run/google-sudoers.d
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'';
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systemd.tmpfiles.rules = [
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"d /run/google-sudoers.d 750 root root -"
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"d /var/google-users.d 750 root root -"
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];
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# enable the nss module, so user lookups etc. work
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system.nssModules = [ package ];
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system.nssDatabases.passwd = [ "cache_oslogin" "oslogin" ];
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system.nssDatabases.group = [ "cache_oslogin" "oslogin" ];
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# Ugly: sshd refuses to start if a store path is given because /nix/store is group-writable.
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# So indirect by a symlink.
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environment.etc."ssh/authorized_keys_command_google_oslogin" = {
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mode = "0755";
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text = ''
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#!/bin/sh
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exec ${package}/bin/google_authorized_keys "$@"
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'';
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};
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services.openssh.authorizedKeysCommand = "/etc/ssh/authorized_keys_command_google_oslogin %u";
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services.openssh.authorizedKeysCommandUser = "nobody";
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};
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}
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