1149 lines
42 KiB
Nix
1149 lines
42 KiB
Nix
# This module provides configuration for the PAM (Pluggable
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# Authentication Modules) system.
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{ config, lib, pkgs, ... }:
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with lib;
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let
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parentConfig = config;
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pamOpts = { config, name, ... }: let cfg = config; in let config = parentConfig; in {
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options = {
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name = mkOption {
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example = "sshd";
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type = types.str;
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description = "Name of the PAM service.";
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};
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unixAuth = mkOption {
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default = true;
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type = types.bool;
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description = ''
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Whether users can log in with passwords defined in
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<filename>/etc/shadow</filename>.
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'';
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};
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rootOK = mkOption {
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default = false;
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type = types.bool;
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description = ''
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If set, root doesn't need to authenticate (e.g. for the
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<command>useradd</command> service).
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'';
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};
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p11Auth = mkOption {
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default = config.security.pam.p11.enable;
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defaultText = literalExpression "config.security.pam.p11.enable";
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type = types.bool;
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description = ''
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If set, keys listed in
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<filename>~/.ssh/authorized_keys</filename> and
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<filename>~/.eid/authorized_certificates</filename>
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can be used to log in with the associated PKCS#11 tokens.
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'';
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};
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u2fAuth = mkOption {
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default = config.security.pam.u2f.enable;
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defaultText = literalExpression "config.security.pam.u2f.enable";
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type = types.bool;
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description = ''
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If set, users listed in
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<filename>$XDG_CONFIG_HOME/Yubico/u2f_keys</filename> (or
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<filename>$HOME/.config/Yubico/u2f_keys</filename> if XDG variable is
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not set) are able to log in with the associated U2F key. Path can be
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changed using <option>security.pam.u2f.authFile</option> option.
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'';
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};
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yubicoAuth = mkOption {
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default = config.security.pam.yubico.enable;
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defaultText = literalExpression "config.security.pam.yubico.enable";
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type = types.bool;
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description = ''
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If set, users listed in
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<filename>~/.yubico/authorized_yubikeys</filename>
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are able to log in with the associated Yubikey tokens.
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'';
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};
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googleAuthenticator = {
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enable = mkOption {
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default = false;
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type = types.bool;
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description = ''
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If set, users with enabled Google Authenticator (created
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<filename>~/.google_authenticator</filename>) will be required
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to provide Google Authenticator token to log in.
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'';
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};
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};
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usbAuth = mkOption {
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default = config.security.pam.usb.enable;
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defaultText = literalExpression "config.security.pam.usb.enable";
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type = types.bool;
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description = ''
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If set, users listed in
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<filename>/etc/pamusb.conf</filename> are able to log in
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with the associated USB key.
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'';
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};
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otpwAuth = mkOption {
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default = config.security.pam.enableOTPW;
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defaultText = literalExpression "config.security.pam.enableOTPW";
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type = types.bool;
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description = ''
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If set, the OTPW system will be used (if
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<filename>~/.otpw</filename> exists).
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'';
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};
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googleOsLoginAccountVerification = mkOption {
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default = false;
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type = types.bool;
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description = ''
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If set, will use the Google OS Login PAM modules
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(<literal>pam_oslogin_login</literal>,
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<literal>pam_oslogin_admin</literal>) to verify possible OS Login
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users and set sudoers configuration accordingly.
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This only makes sense to enable for the <literal>sshd</literal> PAM
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service.
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'';
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};
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googleOsLoginAuthentication = mkOption {
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default = false;
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type = types.bool;
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description = ''
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If set, will use the <literal>pam_oslogin_login</literal>'s user
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authentication methods to authenticate users using 2FA.
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This only makes sense to enable for the <literal>sshd</literal> PAM
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service.
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'';
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};
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fprintAuth = mkOption {
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default = config.services.fprintd.enable;
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defaultText = literalExpression "config.services.fprintd.enable";
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type = types.bool;
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description = ''
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If set, fingerprint reader will be used (if exists and
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your fingerprints are enrolled).
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'';
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};
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oathAuth = mkOption {
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default = config.security.pam.oath.enable;
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defaultText = literalExpression "config.security.pam.oath.enable";
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type = types.bool;
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description = ''
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If set, the OATH Toolkit will be used.
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'';
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};
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sshAgentAuth = mkOption {
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default = false;
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type = types.bool;
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description = ''
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If set, the calling user's SSH agent is used to authenticate
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against the keys in the calling user's
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<filename>~/.ssh/authorized_keys</filename>. This is useful
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for <command>sudo</command> on password-less remote systems.
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'';
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};
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duoSecurity = {
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enable = mkOption {
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default = false;
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type = types.bool;
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description = ''
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If set, use the Duo Security pam module
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<literal>pam_duo</literal> for authentication. Requires
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configuration of <option>security.duosec</option> options.
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'';
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};
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};
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startSession = mkOption {
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default = false;
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type = types.bool;
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description = ''
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If set, the service will register a new session with
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systemd's login manager. For local sessions, this will give
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the user access to audio devices, CD-ROM drives. In the
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default PolicyKit configuration, it also allows the user to
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reboot the system.
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'';
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};
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setEnvironment = mkOption {
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type = types.bool;
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default = true;
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description = ''
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Whether the service should set the environment variables
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listed in <option>environment.sessionVariables</option>
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using <literal>pam_env.so</literal>.
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'';
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};
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setLoginUid = mkOption {
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type = types.bool;
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description = ''
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Set the login uid of the process
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(<filename>/proc/self/loginuid</filename>) for auditing
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purposes. The login uid is only set by ‘entry points’ like
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<command>login</command> and <command>sshd</command>, not by
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commands like <command>sudo</command>.
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'';
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};
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ttyAudit = {
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enable = mkOption {
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type = types.bool;
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default = false;
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description = ''
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Enable or disable TTY auditing for specified users
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'';
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};
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enablePattern = mkOption {
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type = types.nullOr types.str;
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default = null;
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description = ''
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For each user matching one of comma-separated
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glob patterns, enable TTY auditing
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'';
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};
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disablePattern = mkOption {
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type = types.nullOr types.str;
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default = null;
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description = ''
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For each user matching one of comma-separated
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glob patterns, disable TTY auditing
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'';
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};
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openOnly = mkOption {
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type = types.bool;
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default = false;
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description = ''
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Set the TTY audit flag when opening the session,
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but do not restore it when closing the session.
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Using this option is necessary for some services
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that don't fork() to run the authenticated session,
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such as sudo.
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'';
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};
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};
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forwardXAuth = mkOption {
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default = false;
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type = types.bool;
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description = ''
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Whether X authentication keys should be passed from the
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calling user to the target user (e.g. for
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<command>su</command>)
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'';
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};
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pamMount = mkOption {
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default = config.security.pam.mount.enable;
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defaultText = literalExpression "config.security.pam.mount.enable";
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type = types.bool;
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description = ''
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Enable PAM mount (pam_mount) system to mount fileystems on user login.
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'';
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};
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allowNullPassword = mkOption {
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default = false;
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type = types.bool;
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description = ''
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Whether to allow logging into accounts that have no password
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set (i.e., have an empty password field in
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<filename>/etc/passwd</filename> or
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<filename>/etc/group</filename>). This does not enable
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logging into disabled accounts (i.e., that have the password
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field set to <literal>!</literal>). Note that regardless of
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what the pam_unix documentation says, accounts with hashed
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empty passwords are always allowed to log in.
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'';
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};
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nodelay = mkOption {
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default = false;
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type = types.bool;
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description = ''
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Wheather the delay after typing a wrong password should be disabled.
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'';
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};
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requireWheel = mkOption {
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default = false;
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type = types.bool;
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description = ''
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Whether to permit root access only to members of group wheel.
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'';
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};
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limits = mkOption {
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default = [];
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type = limitsType;
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description = ''
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Attribute set describing resource limits. Defaults to the
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value of <option>security.pam.loginLimits</option>.
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The meaning of the values is explained in <citerefentry>
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<refentrytitle>limits.conf</refentrytitle><manvolnum>5</manvolnum>
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</citerefentry>.
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'';
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};
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showMotd = mkOption {
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default = false;
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type = types.bool;
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description = "Whether to show the message of the day.";
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};
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makeHomeDir = mkOption {
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default = false;
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type = types.bool;
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description = ''
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Whether to try to create home directories for users
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with <literal>$HOME</literal>s pointing to nonexistent
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locations on session login.
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'';
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};
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updateWtmp = mkOption {
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default = false;
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type = types.bool;
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description = "Whether to update <filename>/var/log/wtmp</filename>.";
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};
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logFailures = mkOption {
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default = false;
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type = types.bool;
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description = "Whether to log authentication failures in <filename>/var/log/faillog</filename>.";
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};
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enableAppArmor = mkOption {
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default = false;
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type = types.bool;
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description = ''
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Enable support for attaching AppArmor profiles at the
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user/group level, e.g., as part of a role based access
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control scheme.
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'';
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};
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enableKwallet = mkOption {
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default = false;
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type = types.bool;
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description = ''
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If enabled, pam_wallet will attempt to automatically unlock the
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user's default KDE wallet upon login. If the user has no wallet named
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"kdewallet", or the login password does not match their wallet
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password, KDE will prompt separately after login.
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'';
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};
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sssdStrictAccess = mkOption {
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default = false;
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type = types.bool;
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description = "enforce sssd access control";
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};
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enableGnomeKeyring = mkOption {
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default = false;
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type = types.bool;
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description = ''
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If enabled, pam_gnome_keyring will attempt to automatically unlock the
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user's default Gnome keyring upon login. If the user login password does
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not match their keyring password, Gnome Keyring will prompt separately
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after login.
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'';
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};
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gnupg = {
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enable = mkOption {
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type = types.bool;
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default = false;
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description = ''
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If enabled, pam_gnupg will attempt to automatically unlock the
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user's GPG keys with the login password via
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<command>gpg-agent</command>. The keygrips of all keys to be
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unlocked should be written to <filename>~/.pam-gnupg</filename>,
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and can be queried with <command>gpg -K --with-keygrip</command>.
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Presetting passphrases must be enabled by adding
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<literal>allow-preset-passphrase</literal> in
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<filename>~/.gnupg/gpg-agent.conf</filename>.
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'';
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};
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noAutostart = mkOption {
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type = types.bool;
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default = false;
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description = ''
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Don't start <command>gpg-agent</command> if it is not running.
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Useful in conjunction with starting <command>gpg-agent</command> as
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a systemd user service.
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'';
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};
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storeOnly = mkOption {
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type = types.bool;
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default = false;
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description = ''
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Don't send the password immediately after login, but store for PAM
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<literal>session</literal>.
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'';
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};
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};
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text = mkOption {
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type = types.nullOr types.lines;
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description = "Contents of the PAM service file.";
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};
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};
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# The resulting /etc/pam.d/* file contents are verified in
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# nixos/tests/pam/pam-file-contents.nix. Please update tests there when
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# changing the derivation.
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config = {
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name = mkDefault name;
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setLoginUid = mkDefault cfg.startSession;
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limits = mkDefault config.security.pam.loginLimits;
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# !!! TODO: move the LDAP stuff to the LDAP module, and the
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# Samba stuff to the Samba module. This requires that the PAM
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# module provides the right hooks.
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text = mkDefault
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(
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''
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# Account management.
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account required pam_unix.so
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'' +
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optionalString use_ldap ''
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account sufficient ${pam_ldap}/lib/security/pam_ldap.so
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'' +
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optionalString (config.services.sssd.enable && cfg.sssdStrictAccess==false) ''
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account sufficient ${pkgs.sssd}/lib/security/pam_sss.so
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'' +
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optionalString (config.services.sssd.enable && cfg.sssdStrictAccess) ''
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account [default=bad success=ok user_unknown=ignore] ${pkgs.sssd}/lib/security/pam_sss.so
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'' +
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optionalString config.krb5.enable ''
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account sufficient ${pam_krb5}/lib/security/pam_krb5.so
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'' +
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optionalString cfg.googleOsLoginAccountVerification ''
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account [success=ok ignore=ignore default=die] ${pkgs.google-guest-oslogin}/lib/security/pam_oslogin_login.so
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account [success=ok default=ignore] ${pkgs.google-guest-oslogin}/lib/security/pam_oslogin_admin.so
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'' +
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''
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|
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# Authentication management.
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'' +
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optionalString cfg.googleOsLoginAuthentication ''
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auth [success=done perm_denied=die default=ignore] ${pkgs.google-guest-oslogin}/lib/security/pam_oslogin_login.so
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'' +
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optionalString cfg.rootOK ''
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auth sufficient pam_rootok.so
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'' +
|
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optionalString cfg.requireWheel ''
|
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auth required pam_wheel.so use_uid
|
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'' +
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optionalString cfg.logFailures ''
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auth required pam_faillock.so
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'' +
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optionalString (config.security.pam.enableSSHAgentAuth && cfg.sshAgentAuth) ''
|
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auth sufficient ${pkgs.pam_ssh_agent_auth}/libexec/pam_ssh_agent_auth.so file=${lib.concatStringsSep ":" config.services.openssh.authorizedKeysFiles}
|
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'' +
|
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(let p11 = config.security.pam.p11; in optionalString cfg.p11Auth ''
|
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auth ${p11.control} ${pkgs.pam_p11}/lib/security/pam_p11.so ${pkgs.opensc}/lib/opensc-pkcs11.so
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'') +
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(let u2f = config.security.pam.u2f; in optionalString cfg.u2fAuth ''
|
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auth ${u2f.control} ${pkgs.pam_u2f}/lib/security/pam_u2f.so ${optionalString u2f.debug "debug"} ${optionalString (u2f.authFile != null) "authfile=${u2f.authFile}"} ${optionalString u2f.interactive "interactive"} ${optionalString u2f.cue "cue"} ${optionalString (u2f.appId != null) "appid=${u2f.appId}"}
|
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'') +
|
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optionalString cfg.usbAuth ''
|
||
auth sufficient ${pkgs.pam_usb}/lib/security/pam_usb.so
|
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'' +
|
||
(let oath = config.security.pam.oath; in optionalString cfg.oathAuth ''
|
||
auth requisite ${pkgs.oath-toolkit}/lib/security/pam_oath.so window=${toString oath.window} usersfile=${toString oath.usersFile} digits=${toString oath.digits}
|
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'') +
|
||
(let yubi = config.security.pam.yubico; in optionalString cfg.yubicoAuth ''
|
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auth ${yubi.control} ${pkgs.yubico-pam}/lib/security/pam_yubico.so mode=${toString yubi.mode} ${optionalString (yubi.challengeResponsePath != null) "chalresp_path=${yubi.challengeResponsePath}"} ${optionalString (yubi.mode == "client") "id=${toString yubi.id}"} ${optionalString yubi.debug "debug"}
|
||
'') +
|
||
optionalString cfg.fprintAuth ''
|
||
auth sufficient ${pkgs.fprintd}/lib/security/pam_fprintd.so
|
||
'' +
|
||
# Modules in this block require having the password set in PAM_AUTHTOK.
|
||
# pam_unix is marked as 'sufficient' on NixOS which means nothing will run
|
||
# after it succeeds. Certain modules need to run after pam_unix
|
||
# prompts the user for password so we run it once with 'required' at an
|
||
# earlier point and it will run again with 'sufficient' further down.
|
||
# We use try_first_pass the second time to avoid prompting password twice
|
||
(optionalString (cfg.unixAuth &&
|
||
(config.security.pam.enableEcryptfs
|
||
|| cfg.pamMount
|
||
|| cfg.enableKwallet
|
||
|| cfg.enableGnomeKeyring
|
||
|| cfg.googleAuthenticator.enable
|
||
|| cfg.gnupg.enable
|
||
|| cfg.duoSecurity.enable))
|
||
(
|
||
''
|
||
auth required pam_unix.so ${optionalString cfg.allowNullPassword "nullok"} ${optionalString cfg.nodelay "nodelay"} likeauth
|
||
'' +
|
||
optionalString config.security.pam.enableEcryptfs ''
|
||
auth optional ${pkgs.ecryptfs}/lib/security/pam_ecryptfs.so unwrap
|
||
'' +
|
||
optionalString cfg.pamMount ''
|
||
auth optional ${pkgs.pam_mount}/lib/security/pam_mount.so disable_interactive
|
||
'' +
|
||
optionalString cfg.enableKwallet ''
|
||
auth optional ${pkgs.plasma5Packages.kwallet-pam}/lib/security/pam_kwallet5.so kwalletd=${pkgs.plasma5Packages.kwallet.bin}/bin/kwalletd5
|
||
'' +
|
||
optionalString cfg.enableGnomeKeyring ''
|
||
auth optional ${pkgs.gnome.gnome-keyring}/lib/security/pam_gnome_keyring.so
|
||
'' +
|
||
optionalString cfg.gnupg.enable ''
|
||
auth optional ${pkgs.pam_gnupg}/lib/security/pam_gnupg.so ${optionalString cfg.gnupg.storeOnly " store-only"}
|
||
'' +
|
||
optionalString cfg.googleAuthenticator.enable ''
|
||
auth required ${pkgs.google-authenticator}/lib/security/pam_google_authenticator.so no_increment_hotp
|
||
'' +
|
||
optionalString cfg.duoSecurity.enable ''
|
||
auth required ${pkgs.duo-unix}/lib/security/pam_duo.so
|
||
''
|
||
)) +
|
||
optionalString cfg.unixAuth ''
|
||
auth sufficient pam_unix.so ${optionalString cfg.allowNullPassword "nullok"} ${optionalString cfg.nodelay "nodelay"} likeauth try_first_pass
|
||
'' +
|
||
optionalString cfg.otpwAuth ''
|
||
auth sufficient ${pkgs.otpw}/lib/security/pam_otpw.so
|
||
'' +
|
||
optionalString use_ldap ''
|
||
auth sufficient ${pam_ldap}/lib/security/pam_ldap.so use_first_pass
|
||
'' +
|
||
optionalString config.services.sssd.enable ''
|
||
auth sufficient ${pkgs.sssd}/lib/security/pam_sss.so use_first_pass
|
||
'' +
|
||
optionalString config.krb5.enable ''
|
||
auth [default=ignore success=1 service_err=reset] ${pam_krb5}/lib/security/pam_krb5.so use_first_pass
|
||
auth [default=die success=done] ${pam_ccreds}/lib/security/pam_ccreds.so action=validate use_first_pass
|
||
auth sufficient ${pam_ccreds}/lib/security/pam_ccreds.so action=store use_first_pass
|
||
'' +
|
||
''
|
||
auth required pam_deny.so
|
||
|
||
# Password management.
|
||
password sufficient pam_unix.so nullok sha512
|
||
'' +
|
||
optionalString config.security.pam.enableEcryptfs ''
|
||
password optional ${pkgs.ecryptfs}/lib/security/pam_ecryptfs.so
|
||
'' +
|
||
optionalString cfg.pamMount ''
|
||
password optional ${pkgs.pam_mount}/lib/security/pam_mount.so
|
||
'' +
|
||
optionalString use_ldap ''
|
||
password sufficient ${pam_ldap}/lib/security/pam_ldap.so
|
||
'' +
|
||
optionalString config.services.sssd.enable ''
|
||
password sufficient ${pkgs.sssd}/lib/security/pam_sss.so use_authtok
|
||
'' +
|
||
optionalString config.krb5.enable ''
|
||
password sufficient ${pam_krb5}/lib/security/pam_krb5.so use_first_pass
|
||
'' +
|
||
optionalString cfg.enableGnomeKeyring ''
|
||
password optional ${pkgs.gnome.gnome-keyring}/lib/security/pam_gnome_keyring.so use_authtok
|
||
'' +
|
||
''
|
||
|
||
# Session management.
|
||
'' +
|
||
optionalString cfg.setEnvironment ''
|
||
session required pam_env.so conffile=/etc/pam/environment readenv=0
|
||
'' +
|
||
''
|
||
session required pam_unix.so
|
||
'' +
|
||
optionalString cfg.setLoginUid ''
|
||
session ${if config.boot.isContainer then "optional" else "required"} pam_loginuid.so
|
||
'' +
|
||
optionalString cfg.ttyAudit.enable ''
|
||
session required ${pkgs.pam}/lib/security/pam_tty_audit.so
|
||
open_only=${toString cfg.ttyAudit.openOnly}
|
||
${optionalString (cfg.ttyAudit.enablePattern != null) "enable=${cfg.ttyAudit.enablePattern}"}
|
||
${optionalString (cfg.ttyAudit.disablePattern != null) "disable=${cfg.ttyAudit.disablePattern}"}
|
||
'' +
|
||
optionalString cfg.makeHomeDir ''
|
||
session required ${pkgs.pam}/lib/security/pam_mkhomedir.so silent skel=${config.security.pam.makeHomeDir.skelDirectory} umask=0077
|
||
'' +
|
||
optionalString cfg.updateWtmp ''
|
||
session required ${pkgs.pam}/lib/security/pam_lastlog.so silent
|
||
'' +
|
||
optionalString config.security.pam.enableEcryptfs ''
|
||
session optional ${pkgs.ecryptfs}/lib/security/pam_ecryptfs.so
|
||
'' +
|
||
optionalString cfg.pamMount ''
|
||
session optional ${pkgs.pam_mount}/lib/security/pam_mount.so disable_interactive
|
||
'' +
|
||
optionalString use_ldap ''
|
||
session optional ${pam_ldap}/lib/security/pam_ldap.so
|
||
'' +
|
||
optionalString config.services.sssd.enable ''
|
||
session optional ${pkgs.sssd}/lib/security/pam_sss.so
|
||
'' +
|
||
optionalString config.krb5.enable ''
|
||
session optional ${pam_krb5}/lib/security/pam_krb5.so
|
||
'' +
|
||
optionalString cfg.otpwAuth ''
|
||
session optional ${pkgs.otpw}/lib/security/pam_otpw.so
|
||
'' +
|
||
optionalString cfg.startSession ''
|
||
session optional ${pkgs.systemd}/lib/security/pam_systemd.so
|
||
'' +
|
||
optionalString cfg.forwardXAuth ''
|
||
session optional pam_xauth.so xauthpath=${pkgs.xorg.xauth}/bin/xauth systemuser=99
|
||
'' +
|
||
optionalString (cfg.limits != []) ''
|
||
session required ${pkgs.pam}/lib/security/pam_limits.so conf=${makeLimitsConf cfg.limits}
|
||
'' +
|
||
optionalString (cfg.showMotd && config.users.motd != null) ''
|
||
session optional ${pkgs.pam}/lib/security/pam_motd.so motd=${motd}
|
||
'' +
|
||
optionalString (cfg.enableAppArmor && config.security.apparmor.enable) ''
|
||
session optional ${pkgs.apparmor-pam}/lib/security/pam_apparmor.so order=user,group,default debug
|
||
'' +
|
||
optionalString (cfg.enableKwallet) ''
|
||
session optional ${pkgs.plasma5Packages.kwallet-pam}/lib/security/pam_kwallet5.so kwalletd=${pkgs.plasma5Packages.kwallet.bin}/bin/kwalletd5
|
||
'' +
|
||
optionalString (cfg.enableGnomeKeyring) ''
|
||
session optional ${pkgs.gnome.gnome-keyring}/lib/security/pam_gnome_keyring.so auto_start
|
||
'' +
|
||
optionalString cfg.gnupg.enable ''
|
||
session optional ${pkgs.pam_gnupg}/lib/security/pam_gnupg.so ${optionalString cfg.gnupg.noAutostart " no-autostart"}
|
||
'' +
|
||
optionalString (config.virtualisation.lxc.lxcfs.enable) ''
|
||
session optional ${pkgs.lxc}/lib/security/pam_cgfs.so -c all
|
||
''
|
||
);
|
||
};
|
||
|
||
};
|
||
|
||
|
||
inherit (pkgs) pam_krb5 pam_ccreds;
|
||
|
||
use_ldap = (config.users.ldap.enable && config.users.ldap.loginPam);
|
||
pam_ldap = if config.users.ldap.daemon.enable then pkgs.nss_pam_ldapd else pkgs.pam_ldap;
|
||
|
||
# Create a limits.conf(5) file.
|
||
makeLimitsConf = limits:
|
||
pkgs.writeText "limits.conf"
|
||
(concatMapStrings ({ domain, type, item, value }:
|
||
"${domain} ${type} ${item} ${toString value}\n")
|
||
limits);
|
||
|
||
limitsType = with lib.types; listOf (submodule ({ ... }: {
|
||
options = {
|
||
domain = mkOption {
|
||
description = "Username, groupname, or wildcard this limit applies to";
|
||
example = "@wheel";
|
||
type = str;
|
||
};
|
||
|
||
type = mkOption {
|
||
description = "Type of this limit";
|
||
type = enum [ "-" "hard" "soft" ];
|
||
default = "-";
|
||
};
|
||
|
||
item = mkOption {
|
||
description = "Item this limit applies to";
|
||
type = enum [
|
||
"core"
|
||
"data"
|
||
"fsize"
|
||
"memlock"
|
||
"nofile"
|
||
"rss"
|
||
"stack"
|
||
"cpu"
|
||
"nproc"
|
||
"as"
|
||
"maxlogins"
|
||
"maxsyslogins"
|
||
"priority"
|
||
"locks"
|
||
"sigpending"
|
||
"msgqueue"
|
||
"nice"
|
||
"rtprio"
|
||
];
|
||
};
|
||
|
||
value = mkOption {
|
||
description = "Value of this limit";
|
||
type = oneOf [ str int ];
|
||
};
|
||
};
|
||
}));
|
||
|
||
motd = pkgs.writeText "motd" config.users.motd;
|
||
|
||
makePAMService = name: service:
|
||
{ name = "pam.d/${name}";
|
||
value.source = pkgs.writeText "${name}.pam" service.text;
|
||
};
|
||
|
||
in
|
||
|
||
{
|
||
|
||
imports = [
|
||
(mkRenamedOptionModule [ "security" "pam" "enableU2F" ] [ "security" "pam" "u2f" "enable" ])
|
||
];
|
||
|
||
###### interface
|
||
|
||
options = {
|
||
|
||
security.pam.loginLimits = mkOption {
|
||
default = [];
|
||
type = limitsType;
|
||
example =
|
||
[ { domain = "ftp";
|
||
type = "hard";
|
||
item = "nproc";
|
||
value = "0";
|
||
}
|
||
{ domain = "@student";
|
||
type = "-";
|
||
item = "maxlogins";
|
||
value = "4";
|
||
}
|
||
];
|
||
|
||
description =
|
||
'' Define resource limits that should apply to users or groups.
|
||
Each item in the list should be an attribute set with a
|
||
<varname>domain</varname>, <varname>type</varname>,
|
||
<varname>item</varname>, and <varname>value</varname>
|
||
attribute. The syntax and semantics of these attributes
|
||
must be that described in <citerefentry><refentrytitle>limits.conf</refentrytitle>
|
||
<manvolnum>5</manvolnum></citerefentry>.
|
||
|
||
Note that these limits do not apply to systemd services,
|
||
whose limits can be changed via <option>systemd.extraConfig</option>
|
||
instead.
|
||
'';
|
||
};
|
||
|
||
security.pam.services = mkOption {
|
||
default = {};
|
||
type = with types; attrsOf (submodule pamOpts);
|
||
description =
|
||
''
|
||
This option defines the PAM services. A service typically
|
||
corresponds to a program that uses PAM,
|
||
e.g. <command>login</command> or <command>passwd</command>.
|
||
Each attribute of this set defines a PAM service, with the attribute name
|
||
defining the name of the service.
|
||
'';
|
||
};
|
||
|
||
security.pam.makeHomeDir.skelDirectory = mkOption {
|
||
type = types.str;
|
||
default = "/var/empty";
|
||
example = "/etc/skel";
|
||
description = ''
|
||
Path to skeleton directory whose contents are copied to home
|
||
directories newly created by <literal>pam_mkhomedir</literal>.
|
||
'';
|
||
};
|
||
|
||
security.pam.enableSSHAgentAuth = mkOption {
|
||
type = types.bool;
|
||
default = false;
|
||
description =
|
||
''
|
||
Enable sudo logins if the user's SSH agent provides a key
|
||
present in <filename>~/.ssh/authorized_keys</filename>.
|
||
This allows machines to exclusively use SSH keys instead of
|
||
passwords.
|
||
'';
|
||
};
|
||
|
||
security.pam.enableOTPW = mkEnableOption "the OTPW (one-time password) PAM module";
|
||
|
||
security.pam.p11 = {
|
||
enable = mkOption {
|
||
default = false;
|
||
type = types.bool;
|
||
description = ''
|
||
Enables P11 PAM (<literal>pam_p11</literal>) module.
|
||
|
||
If set, users can log in with SSH keys and PKCS#11 tokens.
|
||
|
||
More information can be found <link
|
||
xlink:href="https://github.com/OpenSC/pam_p11">here</link>.
|
||
'';
|
||
};
|
||
|
||
control = mkOption {
|
||
default = "sufficient";
|
||
type = types.enum [ "required" "requisite" "sufficient" "optional" ];
|
||
description = ''
|
||
This option sets pam "control".
|
||
If you want to have multi factor authentication, use "required".
|
||
If you want to use the PKCS#11 device instead of the regular password,
|
||
use "sufficient".
|
||
|
||
Read
|
||
<citerefentry>
|
||
<refentrytitle>pam.conf</refentrytitle>
|
||
<manvolnum>5</manvolnum>
|
||
</citerefentry>
|
||
for better understanding of this option.
|
||
'';
|
||
};
|
||
};
|
||
|
||
security.pam.u2f = {
|
||
enable = mkOption {
|
||
default = false;
|
||
type = types.bool;
|
||
description = ''
|
||
Enables U2F PAM (<literal>pam-u2f</literal>) module.
|
||
|
||
If set, users listed in
|
||
<filename>$XDG_CONFIG_HOME/Yubico/u2f_keys</filename> (or
|
||
<filename>$HOME/.config/Yubico/u2f_keys</filename> if XDG variable is
|
||
not set) are able to log in with the associated U2F key. The path can
|
||
be changed using <option>security.pam.u2f.authFile</option> option.
|
||
|
||
File format is:
|
||
<literal>username:first_keyHandle,first_public_key: second_keyHandle,second_public_key</literal>
|
||
This file can be generated using <command>pamu2fcfg</command> command.
|
||
|
||
More information can be found <link
|
||
xlink:href="https://developers.yubico.com/pam-u2f/">here</link>.
|
||
'';
|
||
};
|
||
|
||
authFile = mkOption {
|
||
default = null;
|
||
type = with types; nullOr path;
|
||
description = ''
|
||
By default <literal>pam-u2f</literal> module reads the keys from
|
||
<filename>$XDG_CONFIG_HOME/Yubico/u2f_keys</filename> (or
|
||
<filename>$HOME/.config/Yubico/u2f_keys</filename> if XDG variable is
|
||
not set).
|
||
|
||
If you want to change auth file locations or centralize database (for
|
||
example use <filename>/etc/u2f-mappings</filename>) you can set this
|
||
option.
|
||
|
||
File format is:
|
||
<literal>username:first_keyHandle,first_public_key: second_keyHandle,second_public_key</literal>
|
||
This file can be generated using <command>pamu2fcfg</command> command.
|
||
|
||
More information can be found <link
|
||
xlink:href="https://developers.yubico.com/pam-u2f/">here</link>.
|
||
'';
|
||
};
|
||
|
||
appId = mkOption {
|
||
default = null;
|
||
type = with types; nullOr str;
|
||
description = ''
|
||
By default <literal>pam-u2f</literal> module sets the application
|
||
ID to <literal>pam://$HOSTNAME</literal>.
|
||
|
||
When using <command>pamu2fcfg</command>, you can specify your
|
||
application ID with the <literal>-i</literal> flag.
|
||
|
||
More information can be found <link
|
||
xlink:href="https://developers.yubico.com/pam-u2f/Manuals/pam_u2f.8.html">
|
||
here</link>
|
||
'';
|
||
};
|
||
|
||
control = mkOption {
|
||
default = "sufficient";
|
||
type = types.enum [ "required" "requisite" "sufficient" "optional" ];
|
||
description = ''
|
||
This option sets pam "control".
|
||
If you want to have multi factor authentication, use "required".
|
||
If you want to use U2F device instead of regular password, use "sufficient".
|
||
|
||
Read
|
||
<citerefentry>
|
||
<refentrytitle>pam.conf</refentrytitle>
|
||
<manvolnum>5</manvolnum>
|
||
</citerefentry>
|
||
for better understanding of this option.
|
||
'';
|
||
};
|
||
|
||
debug = mkOption {
|
||
default = false;
|
||
type = types.bool;
|
||
description = ''
|
||
Debug output to stderr.
|
||
'';
|
||
};
|
||
|
||
interactive = mkOption {
|
||
default = false;
|
||
type = types.bool;
|
||
description = ''
|
||
Set to prompt a message and wait before testing the presence of a U2F device.
|
||
Recommended if your device doesn’t have a tactile trigger.
|
||
'';
|
||
};
|
||
|
||
cue = mkOption {
|
||
default = false;
|
||
type = types.bool;
|
||
description = ''
|
||
By default <literal>pam-u2f</literal> module does not inform user
|
||
that he needs to use the u2f device, it just waits without a prompt.
|
||
|
||
If you set this option to <literal>true</literal>,
|
||
<literal>cue</literal> option is added to <literal>pam-u2f</literal>
|
||
module and reminder message will be displayed.
|
||
'';
|
||
};
|
||
};
|
||
|
||
security.pam.yubico = {
|
||
enable = mkOption {
|
||
default = false;
|
||
type = types.bool;
|
||
description = ''
|
||
Enables Yubico PAM (<literal>yubico-pam</literal>) module.
|
||
|
||
If set, users listed in
|
||
<filename>~/.yubico/authorized_yubikeys</filename>
|
||
are able to log in with the associated Yubikey tokens.
|
||
|
||
The file must have only one line:
|
||
<literal>username:yubikey_token_id1:yubikey_token_id2</literal>
|
||
More information can be found <link
|
||
xlink:href="https://developers.yubico.com/yubico-pam/">here</link>.
|
||
'';
|
||
};
|
||
control = mkOption {
|
||
default = "sufficient";
|
||
type = types.enum [ "required" "requisite" "sufficient" "optional" ];
|
||
description = ''
|
||
This option sets pam "control".
|
||
If you want to have multi factor authentication, use "required".
|
||
If you want to use Yubikey instead of regular password, use "sufficient".
|
||
|
||
Read
|
||
<citerefentry>
|
||
<refentrytitle>pam.conf</refentrytitle>
|
||
<manvolnum>5</manvolnum>
|
||
</citerefentry>
|
||
for better understanding of this option.
|
||
'';
|
||
};
|
||
id = mkOption {
|
||
example = "42";
|
||
type = types.str;
|
||
description = "client id";
|
||
};
|
||
|
||
debug = mkOption {
|
||
default = false;
|
||
type = types.bool;
|
||
description = ''
|
||
Debug output to stderr.
|
||
'';
|
||
};
|
||
mode = mkOption {
|
||
default = "client";
|
||
type = types.enum [ "client" "challenge-response" ];
|
||
description = ''
|
||
Mode of operation.
|
||
|
||
Use "client" for online validation with a YubiKey validation service such as
|
||
the YubiCloud.
|
||
|
||
Use "challenge-response" for offline validation using YubiKeys with HMAC-SHA-1
|
||
Challenge-Response configurations. See the man-page ykpamcfg(1) for further
|
||
details on how to configure offline Challenge-Response validation.
|
||
|
||
More information can be found <link
|
||
xlink:href="https://developers.yubico.com/yubico-pam/Authentication_Using_Challenge-Response.html">here</link>.
|
||
'';
|
||
};
|
||
challengeResponsePath = mkOption {
|
||
default = null;
|
||
type = types.nullOr types.path;
|
||
description = ''
|
||
If not null, set the path used by yubico pam module where the challenge expected response is stored.
|
||
|
||
More information can be found <link
|
||
xlink:href="https://developers.yubico.com/yubico-pam/Authentication_Using_Challenge-Response.html">here</link>.
|
||
'';
|
||
};
|
||
};
|
||
|
||
security.pam.enableEcryptfs = mkEnableOption "eCryptfs PAM module (mounting ecryptfs home directory on login)";
|
||
|
||
users.motd = mkOption {
|
||
default = null;
|
||
example = "Today is Sweetmorn, the 4th day of The Aftermath in the YOLD 3178.";
|
||
type = types.nullOr types.lines;
|
||
description = "Message of the day shown to users when they log in.";
|
||
};
|
||
|
||
};
|
||
|
||
|
||
###### implementation
|
||
|
||
config = {
|
||
|
||
environment.systemPackages =
|
||
# Include the PAM modules in the system path mostly for the manpages.
|
||
[ pkgs.pam ]
|
||
++ optional config.users.ldap.enable pam_ldap
|
||
++ optional config.services.sssd.enable pkgs.sssd
|
||
++ optionals config.krb5.enable [pam_krb5 pam_ccreds]
|
||
++ optionals config.security.pam.enableOTPW [ pkgs.otpw ]
|
||
++ optionals config.security.pam.oath.enable [ pkgs.oath-toolkit ]
|
||
++ optionals config.security.pam.p11.enable [ pkgs.pam_p11 ]
|
||
++ optionals config.security.pam.u2f.enable [ pkgs.pam_u2f ];
|
||
|
||
boot.supportedFilesystems = optionals config.security.pam.enableEcryptfs [ "ecryptfs" ];
|
||
|
||
security.wrappers = {
|
||
unix_chkpwd = {
|
||
setuid = true;
|
||
owner = "root";
|
||
group = "root";
|
||
source = "${pkgs.pam}/bin/unix_chkpwd";
|
||
};
|
||
};
|
||
|
||
environment.etc = mapAttrs' makePAMService config.security.pam.services;
|
||
|
||
security.pam.services =
|
||
{ other.text =
|
||
''
|
||
auth required pam_warn.so
|
||
auth required pam_deny.so
|
||
account required pam_warn.so
|
||
account required pam_deny.so
|
||
password required pam_warn.so
|
||
password required pam_deny.so
|
||
session required pam_warn.so
|
||
session required pam_deny.so
|
||
'';
|
||
|
||
# Most of these should be moved to specific modules.
|
||
i3lock = {};
|
||
i3lock-color = {};
|
||
vlock = {};
|
||
xlock = {};
|
||
xscreensaver = {};
|
||
|
||
runuser = { rootOK = true; unixAuth = false; setEnvironment = false; };
|
||
|
||
/* FIXME: should runuser -l start a systemd session? Currently
|
||
it complains "Cannot create session: Already running in a
|
||
session". */
|
||
runuser-l = { rootOK = true; unixAuth = false; };
|
||
};
|
||
|
||
security.apparmor.includes."abstractions/pam" = let
|
||
isEnabled = test: fold or false (map test (attrValues config.security.pam.services));
|
||
in
|
||
lib.concatMapStrings
|
||
(name: "r ${config.environment.etc."pam.d/${name}".source},\n")
|
||
(attrNames config.security.pam.services) +
|
||
''
|
||
mr ${getLib pkgs.pam}/lib/security/pam_filter/*,
|
||
mr ${getLib pkgs.pam}/lib/security/pam_*.so,
|
||
r ${getLib pkgs.pam}/lib/security/,
|
||
'' +
|
||
optionalString use_ldap ''
|
||
mr ${pam_ldap}/lib/security/pam_ldap.so,
|
||
'' +
|
||
optionalString config.services.sssd.enable ''
|
||
mr ${pkgs.sssd}/lib/security/pam_sss.so,
|
||
'' +
|
||
optionalString config.krb5.enable ''
|
||
mr ${pam_krb5}/lib/security/pam_krb5.so,
|
||
mr ${pam_ccreds}/lib/security/pam_ccreds.so,
|
||
'' +
|
||
optionalString (isEnabled (cfg: cfg.googleOsLoginAccountVerification)) ''
|
||
mr ${pkgs.google-guest-oslogin}/lib/security/pam_oslogin_login.so,
|
||
mr ${pkgs.google-guest-oslogin}/lib/security/pam_oslogin_admin.so,
|
||
'' +
|
||
optionalString (isEnabled (cfg: cfg.googleOsLoginAuthentication)) ''
|
||
mr ${pkgs.google-guest-oslogin}/lib/security/pam_oslogin_login.so,
|
||
'' +
|
||
optionalString (config.security.pam.enableSSHAgentAuth
|
||
&& isEnabled (cfg: cfg.sshAgentAuth)) ''
|
||
mr ${pkgs.pam_ssh_agent_auth}/libexec/pam_ssh_agent_auth.so,
|
||
'' +
|
||
optionalString (isEnabled (cfg: cfg.fprintAuth)) ''
|
||
mr ${pkgs.fprintd}/lib/security/pam_fprintd.so,
|
||
'' +
|
||
optionalString (isEnabled (cfg: cfg.u2fAuth)) ''
|
||
mr ${pkgs.pam_u2f}/lib/security/pam_u2f.so,
|
||
'' +
|
||
optionalString (isEnabled (cfg: cfg.usbAuth)) ''
|
||
mr ${pkgs.pam_usb}/lib/security/pam_usb.so,
|
||
'' +
|
||
optionalString (isEnabled (cfg: cfg.oathAuth)) ''
|
||
"mr ${pkgs.oath-toolkit}/lib/security/pam_oath.so,
|
||
'' +
|
||
optionalString (isEnabled (cfg: cfg.yubicoAuth)) ''
|
||
mr ${pkgs.yubico-pam}/lib/security/pam_yubico.so,
|
||
'' +
|
||
optionalString (isEnabled (cfg: cfg.duoSecurity.enable)) ''
|
||
mr ${pkgs.duo-unix}/lib/security/pam_duo.so,
|
||
'' +
|
||
optionalString (isEnabled (cfg: cfg.otpwAuth)) ''
|
||
mr ${pkgs.otpw}/lib/security/pam_otpw.so,
|
||
'' +
|
||
optionalString config.security.pam.enableEcryptfs ''
|
||
mr ${pkgs.ecryptfs}/lib/security/pam_ecryptfs.so,
|
||
'' +
|
||
optionalString (isEnabled (cfg: cfg.pamMount)) ''
|
||
mr ${pkgs.pam_mount}/lib/security/pam_mount.so,
|
||
'' +
|
||
optionalString (isEnabled (cfg: cfg.enableGnomeKeyring)) ''
|
||
mr ${pkgs.gnome3.gnome-keyring}/lib/security/pam_gnome_keyring.so,
|
||
'' +
|
||
optionalString (isEnabled (cfg: cfg.startSession)) ''
|
||
mr ${pkgs.systemd}/lib/security/pam_systemd.so,
|
||
'' +
|
||
optionalString (isEnabled (cfg: cfg.enableAppArmor)
|
||
&& config.security.apparmor.enable) ''
|
||
mr ${pkgs.apparmor-pam}/lib/security/pam_apparmor.so,
|
||
'' +
|
||
optionalString (isEnabled (cfg: cfg.enableKwallet)) ''
|
||
mr ${pkgs.plasma5Packages.kwallet-pam}/lib/security/pam_kwallet5.so,
|
||
'' +
|
||
optionalString config.virtualisation.lxc.lxcfs.enable ''
|
||
mr ${pkgs.lxc}/lib/security/pam_cgfs.so
|
||
'';
|
||
};
|
||
|
||
}
|