1 ;;; pgg-gpg.el --- GnuPG support for PGG.
3 ;; Copyright (C) 1999,2000 Daiki Ueno
5 ;; Author: Daiki Ueno <ueno@ueda.info.waseda.ac.jp>
7 ;; Keywords: PGP, OpenPGP, GnuPG
9 ;; This file is part of SEMI (Secure Emacs MIME Interface).
11 ;; This program is free software; you can redistribute it and/or
12 ;; modify it under the terms of the GNU General Public License as
13 ;; published by the Free Software Foundation; either version 2, or (at
14 ;; your option) any later version.
16 ;; This program is distributed in the hope that it will be useful, but
17 ;; WITHOUT ANY WARRANTY; without even the implied warranty of
18 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
19 ;; General Public License for more details.
21 ;; You should have received a copy of the GNU General Public License
22 ;; along with GNU Emacs; see the file COPYING. If not, write to the
23 ;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
24 ;; Boston, MA 02111-1307, USA.
28 (eval-when-compile (require 'pgg))
34 (defcustom pgg-gpg-program "gpg"
35 "The GnuPG executable."
39 (defcustom pgg-gpg-shell-file-name "/bin/sh"
40 "File name to load inferior shells from.
41 Bourne shell or its equivalent \(not tcsh) is needed for \"2>\"."
45 (defcustom pgg-gpg-shell-command-switch "-c"
46 "Switch used to have the shell execute its command line argument."
50 (defcustom pgg-gpg-extra-args nil
51 "Extra arguments for every GnuPG invocation."
56 (luna-define-class pgg-scheme-gpg (pgg-scheme)))
58 (defvar pgg-gpg-user-id nil
59 "GnuPG ID of your default identity.")
61 (defvar pgg-scheme-gpg-instance nil)
64 (defun pgg-make-scheme-gpg ()
65 (or pgg-scheme-gpg-instance
66 (setq pgg-scheme-gpg-instance
67 (luna-make-entity 'pgg-scheme-gpg))))
69 (defun pgg-gpg-process-region (start end passphrase program args)
70 (let* ((errors-file-name
71 (concat temporary-file-directory
72 (make-temp-name "pgg-errors")))
74 (concat temporary-file-directory
75 (make-temp-name "pgg-status")))
79 ,@(if passphrase '("--passphrase-fd" "0"))
82 (list (concat "2>" errors-file-name)
83 (concat "3>" status-file-name))))
84 (shell-file-name pgg-gpg-shell-file-name)
85 (shell-command-switch pgg-gpg-shell-command-switch)
86 (output-buffer pgg-output-buffer)
87 (errors-buffer pgg-errors-buffer)
88 (status-buffer pgg-status-buffer)
89 (process-connection-type nil)
90 process status exit-status)
91 (with-current-buffer (get-buffer-create output-buffer)
98 (apply #'start-process-shell-command "*GnuPG*" output-buffer
100 (set-process-sentinel process #'ignore)
102 (process-send-string process (concat passphrase "\n")))
103 (process-send-region process start end)
104 (process-send-eof process)
105 (while (eq 'run (process-status process))
106 (accept-process-output process 5))
107 (setq status (process-status process)
108 exit-status (process-exit-status process))
109 (delete-process process)
110 (with-current-buffer output-buffer
111 (pgg-convert-lbt-region (point-min)(point-max) 'LF)
113 (if (memq status '(stop signal))
114 (error "%s exited abnormally: '%s'" program exit-status))
115 (if (= 127 exit-status)
116 (error "%s could not be found" program))
118 (set-buffer (get-buffer-create errors-buffer))
119 (buffer-disable-undo)
121 (insert-file-contents errors-file-name)
123 (set-buffer (get-buffer-create status-buffer))
124 (buffer-disable-undo)
126 (insert-file-contents status-file-name)))
127 (if (and process (eq 'run (process-status process)))
128 (interrupt-process process))
131 (delete-file status-file-name)
132 (delete-file errors-file-name))
135 (luna-define-method pgg-scheme-lookup-key ((scheme pgg-scheme-gpg)
136 string &optional type)
137 (let ((args (list "--with-colons" "--no-greeting" "--batch"
138 (if type "--list-secret-keys" "--list-keys")
140 (with-current-buffer (get-buffer-create pgg-output-buffer)
141 (buffer-disable-undo)
143 (apply #'call-process pgg-gpg-program nil t nil args)
144 (goto-char (point-min))
145 (when (re-search-forward "^\\(sec\\|pub\\):" nil t)
148 (buffer-substring (match-end 0)
149 (progn (end-of-line)(point)))
153 (luna-define-method pgg-scheme-encrypt-region ((scheme pgg-scheme-gpg)
154 start end recipients)
155 (let* ((pgg-gpg-user-id (or pgg-gpg-user-id pgg-default-user-id))
157 `("--batch" "--armor" "--always-trust" "--encrypt"
160 (mapcar (lambda (rcpt)
161 (list "--remote-user"
162 (concat "\"" rcpt "\"")))
164 (if pgg-encrypt-for-me
165 (list pgg-gpg-user-id)))))))))
166 (pgg-as-lbt start end 'CRLF
167 (pgg-gpg-process-region start end nil pgg-gpg-program args))
168 (pgg-process-when-success
169 (pgg-convert-lbt-region (point-min)(point-max) 'LF))))
171 (luna-define-method pgg-scheme-decrypt-region ((scheme pgg-scheme-gpg)
173 (let* ((pgg-gpg-user-id (or pgg-gpg-user-id pgg-default-user-id))
176 (format "GnuPG passphrase for %s: " pgg-gpg-user-id)
177 (pgg-scheme-lookup-key scheme pgg-gpg-user-id 'encrypt)))
178 (args '("--batch" "--decrypt")))
179 (pgg-gpg-process-region start end passphrase pgg-gpg-program args)
180 (pgg-process-when-success nil)))
182 (luna-define-method pgg-scheme-sign-region ((scheme pgg-scheme-gpg)
183 start end &optional cleartext)
184 (let* ((pgg-gpg-user-id (or pgg-gpg-user-id pgg-default-user-id))
187 (format "GnuPG passphrase for %s: " pgg-gpg-user-id)
188 (pgg-scheme-lookup-key scheme pgg-gpg-user-id 'sign)))
190 (list (if cleartext "--clearsign" "--detach-sign")
191 "--armor" "--batch" "--verbose"
192 "--local-user" pgg-gpg-user-id))
193 (inhibit-read-only t)
195 (pgg-as-lbt start end 'CRLF
196 (pgg-gpg-process-region start end passphrase pgg-gpg-program args))
197 (pgg-process-when-success
198 (pgg-convert-lbt-region (point-min)(point-max) 'LF)
199 (when (re-search-forward "^-+BEGIN PGP SIGNATURE" nil t);XXX
201 (cdr (assq 2 (pgg-parse-armor-region
202 (progn (beginning-of-line 2)
205 (if pgg-cache-passphrase
206 (pgg-add-passphrase-cache
207 (cdr (assq 'key-identifier packet))
210 (luna-define-method pgg-scheme-verify-region ((scheme pgg-scheme-gpg)
211 start end &optional signature)
212 (let ((args '("--batch" "--verify")))
213 (when (stringp signature)
214 (setq args (append args (list signature))))
215 (pgg-gpg-process-region start end nil pgg-gpg-program args)
217 (set-buffer pgg-errors-buffer)
218 (goto-char (point-min))
219 (while (re-search-forward "^gpg: " nil t)
221 (goto-char (point-min))
222 (let ((case-fold-search t))
223 (while (re-search-forward "^warning: " nil t)
224 (delete-region (match-beginning 0)
225 (progn (beginning-of-line 2) (point)))))
226 (set-buffer pgg-status-buffer)
227 (goto-char (point-min))
228 (if (re-search-forward "^\\[GNUPG:] +GOODSIG +" nil t)
230 (set-buffer pgg-output-buffer)
231 (insert-buffer-substring pgg-errors-buffer)
235 (luna-define-method pgg-scheme-insert-key ((scheme pgg-scheme-gpg))
236 (let* ((pgg-gpg-user-id (or pgg-gpg-user-id pgg-default-user-id))
237 (args (list "--batch" "--export" "--armor"
238 (concat "\"" pgg-gpg-user-id "\""))))
239 (pgg-gpg-process-region (point)(point) nil pgg-gpg-program args)
240 (insert-buffer-substring pgg-output-buffer)))
242 (luna-define-method pgg-scheme-snarf-keys-region ((scheme pgg-scheme-gpg)
244 (let ((args '("--import" "--batch" "-")) status)
245 (pgg-gpg-process-region start end nil pgg-gpg-program args)
246 (set-buffer pgg-status-buffer)
247 (goto-char (point-min))
248 (when (re-search-forward "^\\[GNUPG:] +IMPORT_RES +" nil t)
249 (setq status (buffer-substring (match-end 0)
252 status (vconcat (mapcar #'string-to-int
253 (split-string status))))
255 (insert (format "Imported %d key(s).
256 \tArmor contains %d key(s) [%d bad, %d old].\n"
263 (if (zerop (aref status 9))
265 "\tSecret keys are imported.\n")))
266 (append-to-buffer pgg-output-buffer
267 (point-min)(point-max))
268 (pgg-process-when-success nil)))
272 ;;; pgg-gpg.el ends here