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110 lines
2.7 KiB
Nix
110 lines
2.7 KiB
Nix
# Configuration for the pwdutils suite of tools: passwd, useradd, etc.
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{ config, lib, pkgs, ... }:
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with lib;
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let
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loginDefs =
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''
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DEFAULT_HOME yes
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SYS_UID_MIN 400
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SYS_UID_MAX 499
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UID_MIN 1000
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UID_MAX 29999
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SYS_GID_MIN 400
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SYS_GID_MAX 499
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GID_MIN 1000
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GID_MAX 29999
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TTYGROUP tty
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TTYPERM 0620
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# Ensure privacy for newly created home directories.
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UMASK 077
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# Uncomment this to allow non-root users to change their account
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#information. This should be made configurable.
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#CHFN_RESTRICT frwh
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'';
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in
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{
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###### interface
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options = {
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users.defaultUserShell = lib.mkOption {
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description = ''
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This option defines the default shell assigned to user
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accounts. This must not be a store path, since the path is
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used outside the store (in particular in /etc/passwd).
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Rather, it should be the path of a symlink that points to the
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actual shell in the Nix store.
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'';
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example = "/run/current-system/sw/bin/zsh";
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type = types.path;
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};
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};
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###### implementation
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config = {
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environment.systemPackages =
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lib.optional config.users.mutableUsers pkgs.shadow;
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environment.etc =
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[ { # /etc/login.defs: global configuration for pwdutils. You
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# cannot login without it!
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source = pkgs.writeText "login.defs" loginDefs;
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target = "login.defs";
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}
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{ # /etc/default/useradd: configuration for useradd.
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source = pkgs.writeText "useradd"
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''
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GROUP=100
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HOME=/home
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SHELL=${config.users.defaultUserShell}
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'';
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target = "default/useradd";
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}
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];
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security.pam.services =
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{ chsh = { rootOK = true; };
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chfn = { rootOK = true; };
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su = { rootOK = true; forwardXAuth = true; logFailures = true; };
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passwd = {};
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# Note: useradd, groupadd etc. aren't setuid root, so it
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# doesn't really matter what the PAM config says as long as it
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# lets root in.
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useradd = { rootOK = true; };
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usermod = { rootOK = true; };
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userdel = { rootOK = true; };
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groupadd = { rootOK = true; };
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groupmod = { rootOK = true; };
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groupmems = { rootOK = true; };
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groupdel = { rootOK = true; };
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login = { startSession = true; allowNullPassword = true; showMotd = true; updateWtmp = true; };
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chpasswd = { rootOK = true; };
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chgpasswd = { rootOK = true; };
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};
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security.setuidPrograms = [ "passwd" "chfn" "su" "newgrp"
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"newuidmap" "newgidmap" # new in shadow 4.2.x
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];
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};
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}
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