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75 lines
2.4 KiB
Nix
75 lines
2.4 KiB
Nix
{ config, lib, pkgs, ... }:
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let
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cfg = config.services.pcscd;
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cfgFile = pkgs.writeText "reader.conf" config.services.pcscd.readerConfig;
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package = if config.security.polkit.enable
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then pkgs.pcscliteWithPolkit
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else pkgs.pcsclite;
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pluginEnv = pkgs.buildEnv {
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name = "pcscd-plugins";
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paths = map (p: "${p}/pcsc/drivers") config.services.pcscd.plugins;
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};
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in
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{
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options.services.pcscd = {
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enable = lib.mkEnableOption "PCSC-Lite daemon, to access smart cards using SCard API (PC/SC)";
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plugins = lib.mkOption {
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type = lib.types.listOf lib.types.package;
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defaultText = lib.literalExpression "[ pkgs.ccid ]";
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example = lib.literalExpression "[ pkgs.pcsc-cyberjack ]";
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description = "Plugin packages to be used for PCSC-Lite.";
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};
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readerConfig = lib.mkOption {
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type = lib.types.lines;
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default = "";
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example = ''
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FRIENDLYNAME "Some serial reader"
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DEVICENAME /dev/ttyS0
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LIBPATH /path/to/serial_reader.so
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CHANNELID 1
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'';
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description = ''
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Configuration for devices that aren't hotpluggable.
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See {manpage}`reader.conf(5)` for valid options.
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'';
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};
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extraArgs = lib.mkOption {
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type = lib.types.listOf lib.types.str;
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default = [ ];
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description = "Extra command line arguments to be passed to the PCSC daemon.";
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};
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};
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config = lib.mkIf config.services.pcscd.enable {
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environment.etc."reader.conf".source = cfgFile;
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environment.systemPackages = [ package ];
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systemd.packages = [ package ];
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services.pcscd.plugins = [ pkgs.ccid ];
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systemd.sockets.pcscd.wantedBy = [ "sockets.target" ];
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systemd.services.pcscd = {
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environment.PCSCLITE_HP_DROPDIR = pluginEnv;
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# If the cfgFile is empty and not specified (in which case the default
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# /etc/reader.conf is assumed), pcscd will happily start going through the
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# entire confdir (/etc in our case) looking for a config file and try to
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# parse everything it finds. Doesn't take a lot of imagination to see how
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# well that works. It really shouldn't do that to begin with, but to work
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# around it, we force the path to the cfgFile.
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#
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# https://github.com/NixOS/nixpkgs/issues/121088
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serviceConfig.ExecStart = [ "" "${lib.getExe package} -f -x -c ${cfgFile} ${lib.escapeShellArgs cfg.extraArgs}" ];
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};
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};
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}
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