gnu/services/security-token.scm

   1 ;;; GNU Guix --- Functional package management for GNU
   2 ;;; Copyright © 2018 Arun Isaac <arunisaac@systemreboot.net>
   3 ;;;
   4 ;;; This file is part of GNU Guix.
   5 ;;;
   6 ;;; GNU Guix is free software; you can redistribute it and/or modify it
   7 ;;; under the terms of the GNU General Public License as published by
   8 ;;; the Free Software Foundation; either version 3 of the License, or (at
   9 ;;; your option) any later version.
  10 ;;;
  11 ;;; GNU Guix is distributed in the hope that it will be useful, but
  12 ;;; WITHOUT ANY WARRANTY; without even the implied warranty of
  13 ;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 ;;; GNU General Public License for more details.
  15 ;;;
  16 ;;; You should have received a copy of the GNU General Public License
  17 ;;; along with GNU Guix.  If not, see <http://www.gnu.org/licenses/>.
  18
  19 (define-module (gnu services security-token)
  20   #:use-module (gnu services)
  21   #:use-module (gnu services shepherd)
  22   #:use-module (gnu packages admin)
  23   #:use-module (gnu packages base)
  24   #:use-module (gnu packages security-token)
  25   #:use-module (gnu system shadow)
  26   #:use-module (guix gexp)
  27   #:use-module (guix modules)
  28   #:use-module (guix records)
  29   #:use-module (ice-9 match)
  30   #:use-module (srfi srfi-26)
  31   #:export (pcscd-configuration
  32             pcscd-configuration?
  33             pcscd-configuration-pcsc-lite
  34             pcscd-configuration-usb-drivers
  35             pcscd-service-type))
  36
  37 ;;;
  38 ;;; PC/SC Smart Card Daemon
  39 ;;;
  40
  41 (define-record-type* <pcscd-configuration>
  42   pcscd-configuration make-pcscd-configuration pcscd-configuration?
  43   (pcsc-lite pcscd-configuration-pcsc-lite
  44              (default pcsc-lite))
  45   (usb-drivers pcscd-configuration-usb-drivers
  46                (default (list ccid))))
  47
  48 (define pcscd-shepherd-service
  49   (match-lambda
  50     (($ <pcscd-configuration> pcsc-lite)
  51      (with-imported-modules (source-module-closure
  52                              '((gnu build shepherd)))
  53        (shepherd-service
  54         (documentation "PC/SC Smart Card Daemon")
  55         (provision '(pcscd))
  56         (requirement '(syslogd))
  57         (modules '((gnu build shepherd)))
  58         (start #~(lambda _
  59                    (invoke #$(file-append pcsc-lite "/sbin/pcscd"))
  60                    (call-with-input-file "/run/pcscd/pcscd.pid" read)))
  61         (stop #~(make-kill-destructor)))))))
  62
  63 (define pcscd-activation
  64   (match-lambda
  65     (($ <pcscd-configuration> pcsc-lite usb-drivers)
  66      (with-imported-modules (source-module-closure
  67                              '((guix build utils)))
  68        #~(begin
  69            (use-modules (guix build utils))
  70            ;; XXX: We can't use (guix utils) because it requires a
  71            ;; dynamically-linked Guile, hence the duplicate switch-symlinks.
  72            (define (switch-symlinks link target)
  73              (let ((pivot (string-append link ".new")))
  74                (symlink target pivot)
  75                (rename-file pivot link)))
  76            (mkdir-p "/var/lib")
  77            (switch-symlinks "/var/lib/pcsc"
  78                             #$(directory-union
  79                                "pcsc"
  80                                (map (cut file-append <> "/pcsc")
  81                                     usb-drivers))))))))
  82
  83 (define pcscd-service-type
  84   (service-type
  85    (name 'pcscd)
  86    (description
  87     "Run @command{pcscd}, the PC/SC smart card daemon.")
  88    (extensions
  89     (list (service-extension shepherd-root-service-type
  90                              (compose list pcscd-shepherd-service))
  91           (service-extension activation-service-type
  92                              pcscd-activation)))
  93    (default-value (pcscd-configuration))))