commit c6de45c0d798d5302d9050317eac1dbadd3a41b2 · pyrox.dev/nixpkgs

nixos/modules/module-list.nix

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         ./security/chromium-suid-sandbox.nix

     

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         ./security/dhparams.nix

     

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         ./security/duosec.nix

     

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         ./security/google_oslogin.nix

     

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         ./security/hidepid.nix

     

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         ./security/lock-kernel-modules.nix

     

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         ./security/misc.nix

+68

nixos/modules/security/google_oslogin.nix

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       { 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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           # 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.extraConfig = ''

     

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             AuthorizedKeysCommand /etc/ssh/authorized_keys_command_google_oslogin %u

     

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             AuthorizedKeysCommandUser nobody

     

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           '';

     

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         };

     

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       }