1 ;;; epg-config.el --- configuration of the EasyPG Library
3 ;; Copyright (C) 2006, 2007, 2008, 2009 Free Software Foundation, Inc.
5 ;; Author: Daiki Ueno <ueno@unixuser.org>
6 ;; Keywords: PGP, GnuPG
8 ;; This file is part of GNU Emacs.
10 ;; GNU Emacs is free software: you can redistribute it and/or modify
11 ;; it under the terms of the GNU General Public License as published by
12 ;; the Free Software Foundation, either version 3 of the License, or
13 ;; (at your option) any later version.
15 ;; GNU Emacs is distributed in the hope that it will be useful,
16 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
17 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 ;; GNU General Public License for more details.
20 ;; You should have received a copy of the GNU General Public License
21 ;; along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
25 (defconst epg-package-name "epg"
26 "Name of this package.")
28 (defconst epg-version-number "1.0.0"
29 "Version number of this package.")
31 (defconst epg-bug-report-address "ueno@unixuser.org"
32 "Report bugs to this address.")
39 (defcustom epg-gpg-program "gpg"
40 "The `gpg' executable."
44 (defcustom epg-gpgsm-program "gpgsm"
45 "The `gpgsm' executable."
49 (defcustom epg-gpg-home-directory nil
50 "The directory which contains the configuration files of `epg-gpg-program'."
52 :type '(choice (const :tag "Default" nil) directory))
54 (defcustom epg-passphrase-coding-system nil
55 "Coding system to use with messages from `epg-gpg-program'."
59 (defcustom epg-debug nil
60 "If non-nil, debug output goes to the \" *epg-debug*\" buffer.
61 Note that the buffer name starts with a space."
65 (defconst epg-gpg-minimum-version "1.4.3")
68 (defun epg-configuration ()
69 "Return a list of internal configuration parameters of `epg-gpg-program'."
70 (let (config groups type args)
72 (apply #'call-process epg-gpg-program nil (list t nil) nil
73 (append (if epg-gpg-home-directory
74 (list "--homedir" epg-gpg-home-directory))
75 '("--with-colons" "--list-config")))
76 (goto-char (point-min))
77 (while (re-search-forward "^cfg:\\([^:]+\\):\\(.*\\)" nil t)
78 (setq type (intern (match-string 1))
79 args (match-string 2))
82 (if (string-match "\\`\\([^:]+\\):" args)
84 (cons (cons (downcase (match-string 1 args))
85 (delete "" (split-string
91 (message "Invalid group configuration: %S" args))))
92 ((memq type '(pubkey cipher digest compress))
93 (if (string-match "\\`\\([0-9]+\\)\\(;[0-9]+\\)*" args)
96 (mapcar #'string-to-number
97 (delete "" (split-string args ";"))))
100 (message "Invalid %S algorithm configuration: %S"
103 (setq config (cons (cons type args) config))))))
105 (cons (cons 'groups groups) config)
108 (defun epg-config--parse-version (string)
111 (while (eq index (string-match "\\([0-9]+\\)\\.?" string index))
112 (setq version (cons (string-to-number (match-string 1 string))
114 index (match-end 0)))
117 (defun epg-config--compare-version (v1 v2)
118 (while (and v1 v2 (= (car v1) (car v2)))
119 (setq v1 (cdr v1) v2 (cdr v2)))
120 (- (or (car v1) 0) (or (car v2) 0)))
123 (defun epg-check-configuration (config &optional minimum-version)
124 "Verify that a sufficient version of GnuPG is installed."
125 (let ((entry (assq 'version config))
128 (stringp (cdr entry)))
129 (error "Undetermined version: %S" entry))
130 (setq version (epg-config--parse-version (cdr entry))
131 minimum-version (epg-config--parse-version
133 epg-gpg-minimum-version)))
134 (unless (>= (epg-config--compare-version version minimum-version) 0)
135 (error "Unsupported version: %s" (cdr entry)))))
138 (defun epg-expand-group (config group)
139 "Look at CONFIG and try to expand GROUP."
140 (let ((entry (assq 'groups config)))
142 (setq entry (assoc (downcase group) (cdr entry))))
145 (provide 'epg-config)
147 ;; arch-tag: 9aca7cb8-5f63-4bcb-84ee-46fd2db0763f
148 ;;; epg-config.el ends here