1 ;;; pgg-gpg.el --- GnuPG support for PGG.
3 ;; Copyright (C) 1999,2000 Free Software Foundation, Inc.
5 ;; Author: Daiki Ueno <ueno@unixuser.org>
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., 51 Franklin Street, Fifth Floor,
24 ;; Boston, MA 02110-1301, USA.
28 (require 'mel) ; binary-to-text-funcall
29 (eval-when-compile (require 'pgg))
35 (defcustom pgg-gpg-program "gpg"
36 "The GnuPG executable."
40 (defcustom pgg-gpg-extra-args nil
41 "Extra arguments for every GnuPG invocation."
46 (luna-define-class pgg-scheme-gpg (pgg-scheme)))
48 (defvar pgg-gpg-user-id nil
49 "GnuPG ID of your default identity.")
51 (defvar pgg-gpg-messages-coding-system pgg-messages-coding-system
52 "Coding system used when reading from a GnuPG external process.")
54 (defvar pgg-gpg-messages-locale pgg-messages-locale
55 "Locale set before running a GnuPG external process.")
57 (defvar pgg-scheme-gpg-instance nil)
60 (defun pgg-make-scheme-gpg ()
61 (or pgg-scheme-gpg-instance
62 (setq pgg-scheme-gpg-instance
63 (luna-make-entity 'pgg-scheme-gpg))))
65 (defun pgg-gpg-process-region (start end passphrase program args)
66 (let* ((output-file-name (make-temp-file
67 (expand-file-name "pgg-output"
68 temporary-file-directory)))
71 ,@(if passphrase '("--passphrase-fd" "0"))
73 "--output" ,output-file-name
74 ,@pgg-gpg-extra-args ,@args))
75 (output-buffer pgg-output-buffer)
76 (errors-buffer pgg-errors-buffer)
77 (process-connection-type nil)
78 (process-environment process-environment)
79 process status exit-status)
80 (when pgg-gpg-messages-locale
81 (setq process-environment (copy-sequence process-environment))
82 (setenv "LC_ALL" pgg-gpg-messages-locale)
83 (setenv "LANGUAGE" pgg-gpg-messages-locale))
84 (with-current-buffer (get-buffer-create errors-buffer)
90 (apply #'binary-to-text-funcall
91 pgg-gpg-messages-coding-system
92 #'start-process "*GnuPG*" errors-buffer
94 (set-process-sentinel process #'ignore)
96 (process-send-string process (concat passphrase "\n")))
97 (process-send-region process start end)
98 (process-send-eof process)
99 (while (eq 'run (process-status process))
100 (accept-process-output process 5))
101 (setq status (process-status process)
102 exit-status (process-exit-status process))
103 (delete-process process)
104 (with-current-buffer (get-buffer-create output-buffer)
105 (buffer-disable-undo)
107 (if (file-exists-p output-file-name)
108 (let ((coding-system-for-read 'raw-text-dos))
109 (insert-file-contents output-file-name)))
110 (set-buffer errors-buffer)
111 (if (memq status '(stop signal))
112 (error "%s exited abnormally: '%s'" program exit-status))
113 (if (= 127 exit-status)
114 (error "%s could not be found" program))))
115 (if (and process (eq 'run (process-status process)))
116 (interrupt-process process))
117 (if (file-exists-p output-file-name)
118 (delete-file output-file-name)))))
120 (defun pgg-gpg-possibly-cache-passphrase (passphrase)
121 (if (and pgg-cache-passphrase
123 (goto-char (point-min))
124 (re-search-forward "^\\[GNUPG:] GOOD_PASSPHRASE\\>" nil t)))
125 (pgg-add-passphrase-cache
127 (goto-char (point-min))
128 (if (re-search-forward
129 "^\\[GNUPG:] NEED_PASSPHRASE \\w+ ?\\w*" nil t)
130 (substring (match-string 0) -8)))
133 (luna-define-method pgg-scheme-lookup-key ((scheme pgg-scheme-gpg)
134 string &optional type)
135 (let ((args (list "--with-colons" "--no-greeting" "--batch"
136 (if type "--list-secret-keys" "--list-keys")
139 (apply #'call-process pgg-gpg-program nil t nil args)
140 (goto-char (point-min))
141 (if (re-search-forward "^\\(sec\\|pub\\):[^:]*:[^:]*:[^:]*:\\([^:]*\\)"
143 (substring (match-string 2) 8)))))
145 (luna-define-method pgg-scheme-encrypt-region ((scheme pgg-scheme-gpg)
146 start end recipients)
147 (let* ((pgg-gpg-user-id (or pgg-gpg-user-id pgg-default-user-id))
149 `("--batch" "--armor" "--always-trust" "--encrypt"
152 (mapcar (lambda (rcpt)
153 (list "--remote-user" rcpt))
155 (if pgg-encrypt-for-me
156 (list pgg-gpg-user-id)))))))))
157 (pgg-as-lbt start end 'CRLF
158 (pgg-gpg-process-region start end nil pgg-gpg-program args))
159 (pgg-process-when-success)))
161 (luna-define-method pgg-scheme-decrypt-region ((scheme pgg-scheme-gpg)
163 (let* ((pgg-gpg-user-id (or pgg-gpg-user-id pgg-default-user-id))
166 (format "GnuPG passphrase for %s: " pgg-gpg-user-id)
167 (pgg-scheme-lookup-key scheme pgg-gpg-user-id 'encrypt)))
168 (args '("--batch" "--decrypt")))
169 (pgg-gpg-process-region start end passphrase pgg-gpg-program args)
170 (with-current-buffer pgg-errors-buffer
171 (pgg-gpg-possibly-cache-passphrase passphrase)
172 (goto-char (point-min))
173 (re-search-forward "^\\[GNUPG:] DECRYPTION_OKAY\\>" nil t))))
175 (luna-define-method pgg-scheme-sign-region ((scheme pgg-scheme-gpg)
176 start end &optional cleartext)
177 (let* ((pgg-gpg-user-id (or pgg-gpg-user-id pgg-default-user-id))
180 (format "GnuPG passphrase for %s: " pgg-gpg-user-id)
181 (pgg-scheme-lookup-key scheme pgg-gpg-user-id 'sign)))
183 (list (if cleartext "--clearsign" "--detach-sign")
184 "--armor" "--batch" "--verbose"
185 "--local-user" pgg-gpg-user-id))
186 (inhibit-read-only t)
188 (pgg-as-lbt start end 'CRLF
189 (pgg-gpg-process-region start end passphrase pgg-gpg-program args))
190 (with-current-buffer pgg-errors-buffer
191 (pgg-gpg-possibly-cache-passphrase passphrase))
192 (pgg-process-when-success)))
194 (luna-define-method pgg-scheme-verify-region ((scheme pgg-scheme-gpg)
195 start end &optional signature)
196 (let ((args '("--batch" "--verify")))
197 (when (stringp signature)
198 (setq args (append args (list signature))))
199 (setq args (append args '("-")))
200 (pgg-gpg-process-region start end nil pgg-gpg-program args)
201 (with-current-buffer pgg-errors-buffer
202 (goto-char (point-min))
203 (while (re-search-forward "^gpg: " nil t)
205 (goto-char (point-min))
206 (prog1 (re-search-forward "^\\[GNUPG:] GOODSIG\\>" nil t)
207 (goto-char (point-min))
208 (delete-matching-lines "^\\[GNUPG:] ")
209 ;; XXX: copy contents of pgg-errors-buffer into
210 ;; pgg-output-buffer for backward compatibility.
211 (with-current-buffer pgg-output-buffer
212 (set-buffer-multibyte t)
213 (insert-buffer-substring pgg-errors-buffer))))))
215 (luna-define-method pgg-scheme-insert-key ((scheme pgg-scheme-gpg))
216 (let* ((pgg-gpg-user-id (or pgg-gpg-user-id pgg-default-user-id))
217 (args (list "--batch" "--export" "--armor"
219 (pgg-gpg-process-region (point)(point) nil pgg-gpg-program args)
220 (insert-buffer-substring pgg-output-buffer)))
222 (luna-define-method pgg-scheme-snarf-keys-region ((scheme pgg-scheme-gpg)
224 (let ((args '("--import" "--batch" "-")) status)
225 (pgg-gpg-process-region start end nil pgg-gpg-program args)
226 (set-buffer pgg-errors-buffer)
227 (goto-char (point-min))
228 (when (re-search-forward "^\\[GNUPG:] IMPORT_RES\\>" nil t)
229 (setq status (buffer-substring (match-end 0)
230 (progn (end-of-line)(point)))
231 status (vconcat (mapcar #'string-to-int (split-string status))))
233 (insert (format "Imported %d key(s).
234 \tArmor contains %d key(s) [%d bad, %d old].\n"
241 (if (zerop (aref status 9))
243 "\tSecret keys are imported.\n"))
244 ;; XXX: copy contents of pgg-errors-buffer into
245 ;; pgg-output-buffer for backward compatibility.
246 (with-current-buffer pgg-output-buffer
247 (set-buffer-multibyte t)
248 (insert-buffer-substring pgg-errors-buffer))
253 ;;; pgg-gpg.el ends here