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-locale pgg-messages-locale
52 "Locale set before running a GnuPG external process.")
54 (defvar pgg-scheme-gpg-instance nil)
57 (defun pgg-make-scheme-gpg ()
58 (or pgg-scheme-gpg-instance
59 (setq pgg-scheme-gpg-instance
60 (luna-make-entity 'pgg-scheme-gpg))))
62 (defun pgg-gpg-process-region (start end passphrase program args)
63 (let* ((output-file-name (make-temp-file
64 (expand-file-name "pgg-output"
65 temporary-file-directory)))
68 ,@(if passphrase '("--passphrase-fd" "0"))
70 "--output" ,output-file-name
71 ,@pgg-gpg-extra-args ,@args))
72 (output-buffer pgg-output-buffer)
73 (errors-buffer pgg-errors-buffer)
74 (process-connection-type nil)
75 (process-environment process-environment)
76 process status exit-status)
77 (when pgg-gpg-messages-locale
78 (setq process-environment (copy-sequence process-environment))
79 (setenv "LC_ALL" pgg-gpg-messages-locale)
80 (setenv "LANGUAGE" pgg-gpg-messages-locale))
81 (with-current-buffer (get-buffer-create errors-buffer)
86 (let ((coding-system-for-write 'binary))
88 (apply #'start-process "*GnuPG*" errors-buffer
90 (set-process-sentinel process #'ignore)
92 (process-send-string process (concat passphrase "\n")))
93 (process-send-region process start end)
94 (process-send-eof process)
95 (while (eq 'run (process-status process))
96 (accept-process-output process 5))
97 (setq status (process-status process)
98 exit-status (process-exit-status process))
99 (delete-process process)
100 (with-current-buffer (get-buffer-create output-buffer)
101 (buffer-disable-undo)
103 (if (file-exists-p output-file-name)
104 (let ((coding-system-for-read 'raw-text-dos))
105 (insert-file-contents output-file-name)))
106 (set-buffer errors-buffer)
107 (if (memq status '(stop signal))
108 (error "%s exited abnormally: '%s'" program exit-status))
109 (if (= 127 exit-status)
110 (error "%s could not be found" program))))
111 (if (and process (eq 'run (process-status process)))
112 (interrupt-process process))
113 (if (file-exists-p output-file-name)
114 (delete-file output-file-name)))))
116 (defun pgg-gpg-possibly-cache-passphrase (passphrase)
117 (if (and pgg-cache-passphrase
119 (goto-char (point-min))
120 (re-search-forward "^\\[GNUPG:] GOOD_PASSPHRASE\\>" nil t)))
121 (pgg-add-passphrase-cache
123 (goto-char (point-min))
124 (if (re-search-forward
125 "^\\[GNUPG:] NEED_PASSPHRASE \\w+ ?\\w*" nil t)
126 (substring (match-string 0) -8)))
129 (luna-define-method pgg-scheme-lookup-key ((scheme pgg-scheme-gpg)
130 string &optional type)
131 (let ((args (list "--with-colons" "--no-greeting" "--batch"
132 (if type "--list-secret-keys" "--list-keys")
135 (apply #'call-process pgg-gpg-program nil t nil args)
136 (goto-char (point-min))
137 (if (re-search-forward "^\\(sec\\|pub\\):[^:]*:[^:]*:[^:]*:\\([^:]*\\)"
139 (substring (match-string 2) 8)))))
141 (luna-define-method pgg-scheme-encrypt-region ((scheme pgg-scheme-gpg)
142 start end recipients)
143 (let* ((user-id (or pgg-overriding-user-id pgg-gpg-user-id
144 pgg-default-user-id))
146 `("--batch" "--armor" "--always-trust" "--encrypt"
149 (mapcar (lambda (rcpt)
150 (list "--remote-user" rcpt))
152 (if pgg-encrypt-for-me
153 (list user-id)))))))))
154 (pgg-as-lbt start end 'CRLF
155 (pgg-gpg-process-region start end nil pgg-gpg-program args))
156 (pgg-process-when-success)))
158 (luna-define-method pgg-scheme-decrypt-region ((scheme pgg-scheme-gpg)
160 (let* ((user-id (or pgg-overriding-user-id pgg-gpg-user-id
161 pgg-default-user-id))
164 (format "GnuPG passphrase for %s: " pgg-gpg-user-id)
165 (pgg-scheme-lookup-key scheme user-id 'encrypt)))
166 (args '("--batch" "--decrypt")))
167 (pgg-gpg-process-region start end passphrase pgg-gpg-program args)
168 (with-current-buffer pgg-errors-buffer
169 (pgg-gpg-possibly-cache-passphrase passphrase)
170 (goto-char (point-min))
171 (re-search-forward "^\\[GNUPG:] DECRYPTION_OKAY\\>" nil t))))
173 (luna-define-method pgg-scheme-sign-region ((scheme pgg-scheme-gpg)
174 start end &optional cleartext)
175 (let* ((user-id (or pgg-overriding-user-id pgg-gpg-user-id
176 pgg-default-user-id))
179 (format "GnuPG passphrase for %s: " user-id)
180 (pgg-scheme-lookup-key scheme user-id 'sign)))
182 (list (if cleartext "--clearsign" "--detach-sign")
183 "--armor" "--batch" "--verbose"
184 "--local-user" user-id))
185 (inhibit-read-only t)
187 (pgg-as-lbt start end 'CRLF
188 (pgg-gpg-process-region start end passphrase pgg-gpg-program args))
189 (with-current-buffer pgg-errors-buffer
190 (pgg-gpg-possibly-cache-passphrase passphrase))
191 (pgg-process-when-success)))
193 (luna-define-method pgg-scheme-verify-region ((scheme pgg-scheme-gpg)
194 start end &optional signature)
195 (let ((args '("--batch" "--verify")))
196 (when (stringp signature)
197 (setq args (append args (list signature))))
198 (setq args (append args '("-")))
199 (pgg-gpg-process-region start end nil pgg-gpg-program args)
200 (with-current-buffer pgg-errors-buffer
201 (goto-char (point-min))
202 (while (re-search-forward "^gpg: " nil t)
204 (goto-char (point-min))
205 (prog1 (re-search-forward "^\\[GNUPG:] GOODSIG\\>" nil t)
206 (goto-char (point-min))
207 (delete-matching-lines "^\\[GNUPG:] ")
208 ;; XXX: copy contents of pgg-errors-buffer into
209 ;; pgg-output-buffer for backward compatibility.
210 (with-current-buffer pgg-output-buffer
211 (set-buffer-multibyte t)
212 (insert-buffer-substring pgg-errors-buffer))))))
214 (luna-define-method pgg-scheme-insert-key ((scheme pgg-scheme-gpg))
215 (let* ((user-id (or pgg-overriding-user-id pgg-gpg-user-id
216 pgg-default-user-id))
217 (args (list "--batch" "--export" "--armor" user-id)))
218 (pgg-gpg-process-region (point)(point) nil pgg-gpg-program args)
219 (insert-buffer-substring pgg-output-buffer)))
221 (luna-define-method pgg-scheme-snarf-keys-region ((scheme pgg-scheme-gpg)
223 (let ((args '("--import" "--batch" "-")) status)
224 (pgg-gpg-process-region start end nil pgg-gpg-program args)
225 (set-buffer pgg-errors-buffer)
226 (goto-char (point-min))
227 (when (re-search-forward "^\\[GNUPG:] IMPORT_RES\\>" nil t)
228 (setq status (buffer-substring (match-end 0)
229 (progn (end-of-line)(point)))
230 status (vconcat (mapcar #'string-to-int (split-string status))))
232 (insert (format "Imported %d key(s).
233 \tArmor contains %d key(s) [%d bad, %d old].\n"
240 (if (zerop (aref status 9))
242 "\tSecret keys are imported.\n"))
243 ;; XXX: copy contents of pgg-errors-buffer into
244 ;; pgg-output-buffer for backward compatibility.
245 (with-current-buffer pgg-output-buffer
246 (set-buffer-multibyte t)
247 (insert-buffer-substring pgg-errors-buffer))
252 ;;; pgg-gpg.el ends here