nixos/applications/ldap_client.nix

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2.9 KiB
Nix

{ config, pkgs, lib, ... }:
with lib;
let
cfg = config.services.skynet_ldap_client;
# always ensure the admin group has access
create_filter_check_admin = (x: if !(builtins.elem "skynet-admins" x) then x ++ ["skynet-admins"] else x);
# create teh new strings
create_filter_array = map (x: "(skMemberOf=cn=${x},ou=groups,${cfg.base})");
create_filter_join = (x: concatStringsSep "" x);
# thought you could escape racket?
create_filter = (x: create_filter_join (create_filter_array (create_filter_check_admin x) ) );
in {
# these are needed for teh program in question
imports = [];
# give users access to this server
#services.skynet_ldap_client.groups = ["skynet-users-linux"];
options.services.skynet_ldap_client = {
# options that need to be passed in to make this work
enable = mkEnableOption "Skynet LDAP client";
address = mkOption {
type = types.str;
default = "sso.skynet.ie";
description = lib.mdDoc "The domain the ldap is behind";
};
base = mkOption {
type = types.str;
default = "dc=skynet,dc=ie";
description = lib.mdDoc "The base address in the ldap server";
};
groups = mkOption {
type = types.listOf types.str;
default = [
"skynet-admins-linux"
];
description = lib.mdDoc "Groups we want to allow access to the server";
};
};
config = mkIf cfg.enable {
# this is athe actual configuration that we need to do
security.sudo.extraRules = [
# admin group has sudo access
{ groups = [ "skynet-admins-linux" ]; commands = [ { command = "ALL"; options = [ "NOPASSWD" ]; } ]; }
];
# give users a home dir
security.pam.services.sshd.makeHomeDir = true;
services.openssh = {
# only allow ssh keys
settings.PasswordAuthentication = false;
# tell users where tehy cna setup their ssh key
banner = ''
If you get 'Permission denied (publickey,keyboard-interactive)' you need to add an ssh key on https://${cfg.address}
'';
};
services.sssd = {
enable = true;
sshAuthorizedKeysIntegration = true;
config = ''
[domain/skynet.ie]
id_provider = ldap
auth_provider = ldap
sudo_provider = ldap
ldap_uri = ldaps://${cfg.address}:636
ldap_search_base = ${cfg.base}
# thank ye https://medium.com/techish-cloud/linux-user-ssh-authentication-with-sssd-ldap-without-joining-domain-9151396d967d
ldap_user_search_base = ou=users,${cfg.base}?sub?(|${create_filter cfg.groups})
ldap_group_search_base = ou=groups,${cfg.base}
ldap_sudo_search_base = cn=skynet-admins-linux,ou=groups,${cfg.base}
ldap_group_nesting_level = 5
cache_credentials = false
entry_cache_timeout = 1
ldap_user_member_of = skMemberOf
[sssd]
config_file_version = 2
services = nss, pam, sudo, ssh
domains = skynet.ie
[nss]
# override_homedir = /home/%u
[pam]
[sudo]
[autofs]
'';
};
};
}