1 ;;; epg-config.el --- configuration of the EasyPG Library
2 ;; Copyright (C) 2006 Daiki Ueno
4 ;; Author: Daiki Ueno <ueno@unixuser.org>
5 ;; Keywords: PGP, GnuPG
7 ;; This file is part of EasyPG.
9 ;; This program is free software; you can redistribute it and/or modify
10 ;; it under the terms of the GNU General Public License as published by
11 ;; the Free Software Foundation; either version 2, or (at your option)
14 ;; This program is distributed in the hope that it will be useful,
15 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
16 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 ;; GNU General Public License for more details.
19 ;; You should have received a copy of the GNU General Public License
20 ;; along with GNU Emacs; see the file COPYING. If not, write to the
21 ;; Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
22 ;; Boston, MA 02110-1301, USA.
30 (defcustom epg-gpg-program "gpg"
31 "The `gpg' executable."
35 (defcustom epg-gpgsm-program "gpgsm"
36 "The `gpgsm' executable."
40 (defcustom epg-gpg-home-directory nil
41 "The directory which contains the configuration files of `epg-gpg-program'."
43 :type '(choice (const :tag "Default" nil) directory))
45 (defcustom epg-locale-coding-system (if (boundp 'locale-coding-system)
47 "Coding system to use with messages from `epg-gpg-program'."
51 (defconst epg-version-number "0.0.5")
53 (defconst epg-gpg-minimum-version "1.4.3")
56 (defun epg-configuration ()
57 "Return a list of internal configuration parameters of `epg-gpg-program'."
60 (apply #'call-process epg-gpg-program nil (list t nil) nil
61 (append (if epg-gpg-home-directory
62 (list "--homedir" epg-gpg-home-directory))
63 '("--with-colons" "--list-config")))
64 (goto-char (point-min))
65 (while (re-search-forward "^cfg:\\([^:]+\\):\\(.*\\)" nil t)
66 (setq type (intern (match-string 1))
67 config (cons (cons type
69 '(pubkey cipher digest compress))
70 (mapcar #'string-to-number
71 (delete "" (split-string
78 (defun epg-config--parse-version (string)
81 (while (eq index (string-match "\\([0-9]+\\)\\.?" string index))
82 (setq version (cons (string-to-number (match-string 1 string))
87 (defun epg-config--compare-version (v1 v2)
88 (while (and v1 v2 (= (car v1) (car v2)))
89 (setq v1 (cdr v1) v2 (cdr v2)))
90 (- (or (car v1) 0) (or (car v2) 0)))
93 (defun epg-check-configuration (config &optional minimum-version)
94 "Verify that a sufficient version of GnuPG is installed."
95 (let ((entry (assq 'version config))
98 (stringp (cdr entry)))
99 (error "Undetermined version: %S" entry))
100 (setq version (epg-config--parse-version (cdr entry))
101 minimum-version (epg-config--parse-version
103 epg-gpg-minimum-version)))
104 (unless (>= (epg-config--compare-version version minimum-version) 0)
105 (error "Unsupported version: %s" (cdr entry)))))
107 (provide 'epg-config)
109 ;;; epg-config.el ends here