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., 59 Temple Place - Suite 330,
24 ;; Boston, MA 02111-1307, 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-scheme-gpg-instance nil)
54 (defun pgg-make-scheme-gpg ()
55 (or pgg-scheme-gpg-instance
56 (setq pgg-scheme-gpg-instance
57 (luna-make-entity 'pgg-scheme-gpg))))
59 (defun pgg-gpg-process-region (start end passphrase program args)
60 (let* ((output-file-name
61 (concat temporary-file-directory (make-temp-name "pgg-output")))
64 ,@(if passphrase '("--passphrase-fd" "0"))
65 "--output" ,output-file-name
66 ,@pgg-gpg-extra-args ,@args))
67 (output-buffer pgg-output-buffer)
68 (errors-buffer pgg-errors-buffer)
69 (orig-mode (default-file-modes))
70 (process-connection-type nil)
71 process status exit-status)
72 (with-current-buffer (get-buffer-create errors-buffer)
77 (set-default-file-modes 448)
78 (let ((coding-system-for-write 'binary))
80 (apply #'start-process "*GnuPG*" errors-buffer
82 (set-process-sentinel process #'ignore)
84 (process-send-string process (concat passphrase "\n")))
85 (process-send-region process start end)
86 (process-send-eof process)
87 (while (eq 'run (process-status process))
88 (accept-process-output process 5))
89 (setq status (process-status process)
90 exit-status (process-exit-status process))
91 (delete-process process)
92 (with-current-buffer (get-buffer-create output-buffer)
95 (if (file-exists-p output-file-name)
96 (let ((coding-system-for-read 'raw-text-dos))
97 (insert-file-contents output-file-name)))
98 (set-buffer errors-buffer)
99 (if (memq status '(stop signal))
100 (error "%s exited abnormally: '%s'" program exit-status))
101 (if (= 127 exit-status)
102 (error "%s could not be found" program))))
103 (if (and process (eq 'run (process-status process)))
104 (interrupt-process process))
105 (if (file-exists-p output-file-name)
106 (delete-file output-file-name))
107 (set-default-file-modes orig-mode))))
109 (defun pgg-gpg-possibly-cache-passphrase (passphrase)
110 (if (and pgg-cache-passphrase
112 (goto-char (point-min))
113 (re-search-forward "^\\[GNUPG:] GOOD_PASSPHRASE\\>" nil t)))
114 (pgg-add-passphrase-cache
116 (goto-char (point-min))
117 (if (re-search-forward
118 "^\\[GNUPG:] NEED_PASSPHRASE \\w+ ?\\w*" nil t)
119 (substring (match-string 0) -8)))
122 (luna-define-method pgg-scheme-lookup-key ((scheme pgg-scheme-gpg)
123 string &optional type)
124 (let ((args (list "--with-colons" "--no-greeting" "--batch"
125 (if type "--list-secret-keys" "--list-keys")
128 (apply #'call-process pgg-gpg-program nil t nil args)
129 (goto-char (point-min))
130 (if (re-search-forward "^\\(sec\\|pub\\):" nil t)
133 (buffer-substring (match-end 0)
134 (progn (end-of-line)(point)))
137 (luna-define-method pgg-scheme-encrypt-region ((scheme pgg-scheme-gpg)
138 start end recipients)
139 (let* ((pgg-gpg-user-id (or pgg-gpg-user-id pgg-default-user-id))
141 `("--batch" "--armor" "--always-trust" "--encrypt"
144 (mapcar (lambda (rcpt)
145 (list "--remote-user" rcpt))
147 (if pgg-encrypt-for-me
148 (list pgg-gpg-user-id)))))))))
149 (pgg-as-lbt start end 'CRLF
150 (pgg-gpg-process-region start end nil pgg-gpg-program args))
151 (pgg-process-when-success)))
153 (luna-define-method pgg-scheme-decrypt-region ((scheme pgg-scheme-gpg)
155 (let* ((pgg-gpg-user-id (or pgg-gpg-user-id pgg-default-user-id))
158 (format "GnuPG passphrase for %s: " pgg-gpg-user-id)
159 (pgg-scheme-lookup-key scheme pgg-gpg-user-id 'encrypt)))
160 (args '("--batch" "--decrypt")))
161 (pgg-gpg-process-region start end passphrase pgg-gpg-program args)
162 (with-current-buffer pgg-errors-buffer
163 (pgg-gpg-possibly-cache-passphrase passphrase)
164 (goto-char (point-min))
165 (re-search-forward "^\\[GNUPG:] DECRYPTION_OKAY\\>" nil t))))
167 (luna-define-method pgg-scheme-sign-region ((scheme pgg-scheme-gpg)
168 start end &optional cleartext)
169 (let* ((pgg-gpg-user-id (or pgg-gpg-user-id pgg-default-user-id))
172 (format "GnuPG passphrase for %s: " pgg-gpg-user-id)
173 (pgg-scheme-lookup-key scheme pgg-gpg-user-id 'sign)))
175 (list (if cleartext "--clearsign" "--detach-sign")
176 "--armor" "--batch" "--verbose"
177 "--local-user" pgg-gpg-user-id))
178 (inhibit-read-only t)
180 (pgg-as-lbt start end 'CRLF
181 (pgg-gpg-process-region start end passphrase pgg-gpg-program args))
182 (with-current-buffer pgg-errors-buffer
183 (pgg-gpg-possibly-cache-passphrase passphrase))
184 (pgg-process-when-success)))
186 (luna-define-method pgg-scheme-verify-region ((scheme pgg-scheme-gpg)
187 start end &optional signature)
188 (let ((args '("--batch" "--verify")))
189 (when (stringp signature)
190 (setq args (append args (list signature))))
191 (setq args (append args '("-")))
192 (pgg-gpg-process-region start end nil pgg-gpg-program args)
193 (with-current-buffer pgg-errors-buffer
194 (goto-char (point-min))
195 (while (re-search-forward "^gpg: " nil t)
197 (goto-char (point-min))
198 (prog1 (re-search-forward "^\\[GNUPG:] GOODSIG\\>" nil t)
199 (goto-char (point-min))
200 (delete-matching-lines "^warning\\|\\[GNUPG:]")
201 (set-buffer pgg-output-buffer)
202 (insert-buffer-substring pgg-errors-buffer)))))
204 (luna-define-method pgg-scheme-insert-key ((scheme pgg-scheme-gpg))
205 (let* ((pgg-gpg-user-id (or pgg-gpg-user-id pgg-default-user-id))
206 (args (list "--batch" "--export" "--armor"
208 (pgg-gpg-process-region (point)(point) nil pgg-gpg-program args)
209 (insert-buffer-substring pgg-output-buffer)))
211 (luna-define-method pgg-scheme-snarf-keys-region ((scheme pgg-scheme-gpg)
213 (let ((args '("--import" "--batch" "-")) status)
214 (pgg-gpg-process-region start end nil pgg-gpg-program args)
215 (set-buffer pgg-errors-buffer)
216 (goto-char (point-min))
217 (when (re-search-forward "^\\[GNUPG:] IMPORT_RES\\>" nil t)
218 (setq status (buffer-substring (match-end 0)
219 (progn (end-of-line)(point)))
220 status (vconcat (mapcar #'string-to-int (split-string status))))
222 (insert (format "Imported %d key(s).
223 \tArmor contains %d key(s) [%d bad, %d old].\n"
230 (if (zerop (aref status 9))
232 "\tSecret keys are imported.\n")))
233 (append-to-buffer pgg-output-buffer (point-min)(point-max))
234 (pgg-process-when-success)))
238 ;;; pgg-gpg.el ends here