1 ;;; epg-config.el --- configuration of the EasyPG Library
3 ;; Copyright (C) 2006, 2007, 2008, 2009, 2010 Free Software Foundation, Inc.
5 ;; Author: Daiki Ueno <ueno@unixuser.org>
6 ;; Keywords: PGP, GnuPG
9 ;; This file is part of GNU Emacs.
11 ;; GNU Emacs is free software: you can redistribute it and/or modify
12 ;; it under the terms of the GNU General Public License as published by
13 ;; the Free Software Foundation, either version 3 of the License, or
14 ;; (at your option) any later version.
16 ;; GNU Emacs is distributed in the hope that it will be useful,
17 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
18 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 ;; GNU General Public License for more details.
21 ;; You should have received a copy of the GNU General Public License
22 ;; along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
26 (defconst epg-package-name "epg"
27 "Name of this package.")
29 (defconst epg-version-number "1.0.0"
30 "Version number of this package.")
32 (defconst epg-bug-report-address "ueno@unixuser.org"
33 "Report bugs to this address.")
40 (defcustom epg-gpg-program (or (executable-find "gpg")
41 (executable-find "gpg2")
43 "The `gpg' executable."
47 (defcustom epg-gpgsm-program "gpgsm"
48 "The `gpgsm' executable."
52 (defcustom epg-gpg-home-directory nil
53 "The directory which contains the configuration files of `epg-gpg-program'."
55 :type '(choice (const :tag "Default" nil) directory))
57 (defcustom epg-passphrase-coding-system nil
58 "Coding system to use with messages from `epg-gpg-program'."
62 (defcustom epg-debug nil
63 "If non-nil, debug output goes to the \" *epg-debug*\" buffer.
64 Note that the buffer name starts with a space."
68 (defconst epg-gpg-minimum-version "1.4.3")
71 (defun epg-configuration ()
72 "Return a list of internal configuration parameters of `epg-gpg-program'."
73 (let (config groups type args)
75 (apply #'call-process epg-gpg-program nil (list t nil) nil
76 (append (if epg-gpg-home-directory
77 (list "--homedir" epg-gpg-home-directory))
78 '("--with-colons" "--list-config")))
79 (goto-char (point-min))
80 (while (re-search-forward "^cfg:\\([^:]+\\):\\(.*\\)" nil t)
81 (setq type (intern (match-string 1))
82 args (match-string 2))
85 (if (string-match "\\`\\([^:]+\\):" args)
87 (cons (cons (downcase (match-string 1 args))
88 (delete "" (split-string
94 (message "Invalid group configuration: %S" args))))
95 ((memq type '(pubkey cipher digest compress))
96 (if (string-match "\\`\\([0-9]+\\)\\(;[0-9]+\\)*" args)
99 (mapcar #'string-to-number
100 (delete "" (split-string args ";"))))
103 (message "Invalid %S algorithm configuration: %S"
106 (setq config (cons (cons type args) config))))))
108 (cons (cons 'groups groups) config)
111 (defun epg-config--parse-version (string)
114 (while (eq index (string-match "\\([0-9]+\\)\\.?" string index))
115 (setq version (cons (string-to-number (match-string 1 string))
117 index (match-end 0)))
120 (defun epg-config--compare-version (v1 v2)
121 (while (and v1 v2 (= (car v1) (car v2)))
122 (setq v1 (cdr v1) v2 (cdr v2)))
123 (- (or (car v1) 0) (or (car v2) 0)))
126 (defun epg-check-configuration (config &optional minimum-version)
127 "Verify that a sufficient version of GnuPG is installed."
128 (let ((entry (assq 'version config))
131 (stringp (cdr entry)))
132 (error "Undetermined version: %S" entry))
133 (setq version (epg-config--parse-version (cdr entry))
134 minimum-version (epg-config--parse-version
136 epg-gpg-minimum-version)))
137 (unless (>= (epg-config--compare-version version minimum-version) 0)
138 (error "Unsupported version: %s" (cdr entry)))))
141 (defun epg-expand-group (config group)
142 "Look at CONFIG and try to expand GROUP."
143 (let ((entry (assq 'groups config)))
145 (setq entry (assoc (downcase group) (cdr entry))))
148 (provide 'epg-config)
150 ;; arch-tag: 9aca7cb8-5f63-4bcb-84ee-46fd2db0763f
151 ;;; epg-config.el ends here