241 lines
7.5 KiB
Nix
241 lines
7.5 KiB
Nix
{ config, lib, pkgs, ... }:
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with lib;
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let
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cfg = config.programs.gnupg;
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agentSettingsFormat = pkgs.formats.keyValue {
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mkKeyValue = lib.generators.mkKeyValueDefault { } " ";
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};
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xserverCfg = config.services.xserver;
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defaultPinentryFlavor =
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if xserverCfg.desktopManager.lxqt.enable
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|| xserverCfg.desktopManager.plasma5.enable
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|| xserverCfg.desktopManager.plasma6.enable
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|| xserverCfg.desktopManager.deepin.enable then
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"qt"
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else if xserverCfg.desktopManager.xfce.enable then
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"gtk2"
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else if xserverCfg.enable || config.programs.sway.enable then
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"gnome3"
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else
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"curses";
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in
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{
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options.programs.gnupg = {
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package = mkPackageOption pkgs "gnupg" { };
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agent.enable = mkOption {
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type = types.bool;
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default = false;
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description = lib.mdDoc ''
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Enables GnuPG agent with socket-activation for every user session.
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'';
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};
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agent.enableSSHSupport = mkOption {
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type = types.bool;
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default = false;
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description = lib.mdDoc ''
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Enable SSH agent support in GnuPG agent. Also sets SSH_AUTH_SOCK
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environment variable correctly. This will disable socket-activation
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and thus always start a GnuPG agent per user session.
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'';
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};
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agent.enableExtraSocket = mkOption {
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type = types.bool;
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default = false;
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description = lib.mdDoc ''
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Enable extra socket for GnuPG agent.
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'';
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};
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agent.enableBrowserSocket = mkOption {
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type = types.bool;
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default = false;
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description = lib.mdDoc ''
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Enable browser socket for GnuPG agent.
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'';
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};
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agent.pinentryFlavor = mkOption {
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type = types.nullOr (types.enum pkgs.pinentry.flavors);
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example = "gnome3";
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default = defaultPinentryFlavor;
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defaultText = literalMD ''matching the configured desktop environment'';
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description = lib.mdDoc ''
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Which pinentry interface to use. If not null, the path to the
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pinentry binary will be set in /etc/gnupg/gpg-agent.conf.
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If not set at all, it'll pick an appropriate flavor depending on the
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system configuration (qt flavor for lxqt and plasma5, gtk2 for xfce
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4.12, gnome3 on all other systems with X enabled, ncurses otherwise).
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'';
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};
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agent.settings = mkOption {
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type = agentSettingsFormat.type;
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default = { };
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example = {
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default-cache-ttl = 600;
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};
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description = lib.mdDoc ''
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Configuration for /etc/gnupg/gpg-agent.conf.
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See {manpage}`gpg-agent(1)` for supported options.
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'';
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};
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dirmngr.enable = mkOption {
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type = types.bool;
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default = false;
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description = lib.mdDoc ''
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Enables GnuPG network certificate management daemon with socket-activation for every user session.
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'';
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};
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};
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config = mkIf cfg.agent.enable {
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programs.gnupg.agent.settings = {
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pinentry-program = lib.mkIf (cfg.agent.pinentryFlavor != null)
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"${pkgs.pinentry.${cfg.agent.pinentryFlavor}}/bin/pinentry";
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};
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environment.etc."gnupg/gpg-agent.conf".source =
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agentSettingsFormat.generate "gpg-agent.conf" cfg.agent.settings;
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# This overrides the systemd user unit shipped with the gnupg package
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systemd.user.services.gpg-agent = {
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unitConfig = {
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Description = "GnuPG cryptographic agent and passphrase cache";
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Documentation = "man:gpg-agent(1)";
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Requires = [ "sockets.target" ];
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};
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serviceConfig = {
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ExecStart = "${cfg.package}/bin/gpg-agent --supervised";
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ExecReload = "${cfg.package}/bin/gpgconf --reload gpg-agent";
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};
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};
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systemd.user.sockets.gpg-agent = {
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unitConfig = {
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Description = "GnuPG cryptographic agent and passphrase cache";
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Documentation = "man:gpg-agent(1)";
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};
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socketConfig = {
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ListenStream = "%t/gnupg/S.gpg-agent";
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FileDescriptorName = "std";
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SocketMode = "0600";
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DirectoryMode = "0700";
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};
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wantedBy = [ "sockets.target" ];
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};
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systemd.user.sockets.gpg-agent-ssh = mkIf cfg.agent.enableSSHSupport {
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unitConfig = {
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Description = "GnuPG cryptographic agent (ssh-agent emulation)";
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Documentation = "man:gpg-agent(1) man:ssh-add(1) man:ssh-agent(1) man:ssh(1)";
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};
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socketConfig = {
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ListenStream = "%t/gnupg/S.gpg-agent.ssh";
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FileDescriptorName = "ssh";
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Service = "gpg-agent.service";
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SocketMode = "0600";
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DirectoryMode = "0700";
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};
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wantedBy = [ "sockets.target" ];
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};
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systemd.user.sockets.gpg-agent-extra = mkIf cfg.agent.enableExtraSocket {
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unitConfig = {
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Description = "GnuPG cryptographic agent and passphrase cache (restricted)";
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Documentation = "man:gpg-agent(1)";
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};
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socketConfig = {
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ListenStream = "%t/gnupg/S.gpg-agent.extra";
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FileDescriptorName = "extra";
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Service = "gpg-agent.service";
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SocketMode = "0600";
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DirectoryMode = "0700";
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};
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wantedBy = [ "sockets.target" ];
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};
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systemd.user.sockets.gpg-agent-browser = mkIf cfg.agent.enableBrowserSocket {
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unitConfig = {
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Description = "GnuPG cryptographic agent and passphrase cache (access for web browsers)";
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Documentation = "man:gpg-agent(1)";
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};
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socketConfig = {
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ListenStream = "%t/gnupg/S.gpg-agent.browser";
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FileDescriptorName = "browser";
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Service = "gpg-agent.service";
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SocketMode = "0600";
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DirectoryMode = "0700";
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};
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wantedBy = [ "sockets.target" ];
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};
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systemd.user.services.dirmngr = mkIf cfg.dirmngr.enable {
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unitConfig = {
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Description = "GnuPG network certificate management daemon";
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Documentation = "man:dirmngr(8)";
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Requires = "dirmngr.socket";
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};
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serviceConfig = {
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ExecStart = "${cfg.package}/bin/dirmngr --supervised";
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ExecReload = "${cfg.package}/bin/gpgconf --reload dirmngr";
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};
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};
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systemd.user.sockets.dirmngr = mkIf cfg.dirmngr.enable {
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unitConfig = {
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Description = "GnuPG network certificate management daemon";
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Documentation = "man:dirmngr(8)";
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};
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socketConfig = {
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ListenStream = "%t/gnupg/S.dirmngr";
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SocketMode = "0600";
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DirectoryMode = "0700";
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};
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wantedBy = [ "sockets.target" ];
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};
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services.dbus.packages = mkIf (cfg.agent.pinentryFlavor == "gnome3") [ pkgs.gcr ];
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environment.systemPackages = with pkgs; [ cfg.package ];
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environment.interactiveShellInit = ''
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# Bind gpg-agent to this TTY if gpg commands are used.
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export GPG_TTY=$(tty)
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'';
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programs.ssh.extraConfig = optionalString cfg.agent.enableSSHSupport ''
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# The SSH agent protocol doesn't have support for changing TTYs; however we
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# can simulate this with the `exec` feature of openssh (see ssh_config(5))
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# that hooks a command to the shell currently running the ssh program.
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Match host * exec "${pkgs.runtimeShell} -c '${cfg.package}/bin/gpg-connect-agent --quiet updatestartuptty /bye >/dev/null 2>&1'"
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'';
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environment.extraInit = mkIf cfg.agent.enableSSHSupport ''
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if [ -z "$SSH_AUTH_SOCK" ]; then
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export SSH_AUTH_SOCK=$(${cfg.package}/bin/gpgconf --list-dirs agent-ssh-socket)
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fi
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'';
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assertions = [
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{ assertion = cfg.agent.enableSSHSupport -> !config.programs.ssh.startAgent;
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message = "You can't use ssh-agent and GnuPG agent with SSH support enabled at the same time!";
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}
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];
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};
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# uses attributes of the linked package
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meta.buildDocsInSandbox = false;
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}
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