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-gpg-messages-coding-system pgg-messages-coding-system
52 "Coding system used when reading from 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-name
64 (expand-file-name "pgg-output"
65 temporary-file-directory)))
68 ,@(if passphrase '("--passphrase-fd" "0"))
69 "--output" ,output-file-name
70 ,@pgg-gpg-extra-args ,@args))
71 (output-buffer pgg-output-buffer)
72 (errors-buffer pgg-errors-buffer)
73 (orig-mode (default-file-modes))
74 (process-connection-type nil)
75 process status exit-status)
76 (with-current-buffer (get-buffer-create errors-buffer)
81 (set-default-file-modes 448)
83 (apply #'binary-to-text-funcall
84 pgg-gpg-messages-coding-system
85 #'start-process "*GnuPG*" errors-buffer
87 (set-process-sentinel process #'ignore)
89 (process-send-string process (concat passphrase "\n")))
90 (process-send-region process start end)
91 (process-send-eof process)
92 (while (eq 'run (process-status process))
93 (accept-process-output process 5))
94 (setq status (process-status process)
95 exit-status (process-exit-status process))
96 (delete-process process)
97 (with-current-buffer (get-buffer-create output-buffer)
100 (if (file-exists-p output-file-name)
101 (let ((coding-system-for-read 'raw-text-dos))
102 (insert-file-contents output-file-name)))
103 (set-buffer errors-buffer)
104 (if (memq status '(stop signal))
105 (error "%s exited abnormally: '%s'" program exit-status))
106 (if (= 127 exit-status)
107 (error "%s could not be found" program))))
108 (if (and process (eq 'run (process-status process)))
109 (interrupt-process process))
110 (if (file-exists-p output-file-name)
111 (delete-file output-file-name))
112 (set-default-file-modes orig-mode))))
114 (defun pgg-gpg-possibly-cache-passphrase (passphrase)
115 (if (and pgg-cache-passphrase
117 (goto-char (point-min))
118 (re-search-forward "^\\[GNUPG:] GOOD_PASSPHRASE\\>" nil t)))
119 (pgg-add-passphrase-cache
121 (goto-char (point-min))
122 (if (re-search-forward
123 "^\\[GNUPG:] NEED_PASSPHRASE \\w+ ?\\w*" nil t)
124 (substring (match-string 0) -8)))
127 (luna-define-method pgg-scheme-lookup-key ((scheme pgg-scheme-gpg)
128 string &optional type)
129 (let ((args (list "--with-colons" "--no-greeting" "--batch"
130 (if type "--list-secret-keys" "--list-keys")
133 (apply #'call-process pgg-gpg-program nil t nil args)
134 (goto-char (point-min))
135 (if (re-search-forward "^\\(sec\\|pub\\):" nil t)
138 (buffer-substring (match-end 0)
139 (progn (end-of-line)(point)))
142 (luna-define-method pgg-scheme-encrypt-region ((scheme pgg-scheme-gpg)
143 start end recipients)
144 (let* ((pgg-gpg-user-id (or pgg-gpg-user-id 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 pgg-gpg-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* ((pgg-gpg-user-id (or pgg-gpg-user-id pgg-default-user-id))
163 (format "GnuPG passphrase for %s: " pgg-gpg-user-id)
164 (pgg-scheme-lookup-key scheme pgg-gpg-user-id 'encrypt)))
165 (args '("--batch" "--decrypt")))
166 (pgg-gpg-process-region start end passphrase pgg-gpg-program args)
167 (with-current-buffer pgg-errors-buffer
168 (pgg-gpg-possibly-cache-passphrase passphrase)
169 (goto-char (point-min))
170 (re-search-forward "^\\[GNUPG:] DECRYPTION_OKAY\\>" nil t))))
172 (luna-define-method pgg-scheme-sign-region ((scheme pgg-scheme-gpg)
173 start end &optional cleartext)
174 (let* ((pgg-gpg-user-id (or pgg-gpg-user-id pgg-default-user-id))
177 (format "GnuPG passphrase for %s: " pgg-gpg-user-id)
178 (pgg-scheme-lookup-key scheme pgg-gpg-user-id 'sign)))
180 (list (if cleartext "--clearsign" "--detach-sign")
181 "--armor" "--batch" "--verbose"
182 "--local-user" pgg-gpg-user-id))
183 (inhibit-read-only t)
185 (pgg-as-lbt start end 'CRLF
186 (pgg-gpg-process-region start end passphrase pgg-gpg-program args))
187 (with-current-buffer pgg-errors-buffer
188 (pgg-gpg-possibly-cache-passphrase passphrase))
189 (pgg-process-when-success)))
191 (luna-define-method pgg-scheme-verify-region ((scheme pgg-scheme-gpg)
192 start end &optional signature)
193 (let ((args '("--batch" "--verify")))
194 (when (stringp signature)
195 (setq args (append args (list signature))))
196 (setq args (append args '("-")))
197 (pgg-gpg-process-region start end nil pgg-gpg-program args)
198 (with-current-buffer pgg-errors-buffer
199 (goto-char (point-min))
200 (while (re-search-forward "^gpg: " nil t)
202 (goto-char (point-min))
203 (prog1 (re-search-forward "^\\[GNUPG:] GOODSIG\\>" nil t)
204 (goto-char (point-min))
205 (delete-matching-lines "^warning\\|\\[GNUPG:]")
206 (set-buffer pgg-output-buffer)
207 (insert-buffer-substring pgg-errors-buffer)))))
209 (luna-define-method pgg-scheme-insert-key ((scheme pgg-scheme-gpg))
210 (let* ((pgg-gpg-user-id (or pgg-gpg-user-id pgg-default-user-id))
211 (args (list "--batch" "--export" "--armor"
213 (pgg-gpg-process-region (point)(point) nil pgg-gpg-program args)
214 (insert-buffer-substring pgg-output-buffer)))
216 (luna-define-method pgg-scheme-snarf-keys-region ((scheme pgg-scheme-gpg)
218 (let ((args '("--import" "--batch" "-")) status)
219 (pgg-gpg-process-region start end nil pgg-gpg-program args)
220 (set-buffer pgg-errors-buffer)
221 (goto-char (point-min))
222 (when (re-search-forward "^\\[GNUPG:] IMPORT_RES\\>" nil t)
223 (setq status (buffer-substring (match-end 0)
224 (progn (end-of-line)(point)))
225 status (vconcat (mapcar #'string-to-int (split-string status))))
227 (insert (format "Imported %d key(s).
228 \tArmor contains %d key(s) [%d bad, %d old].\n"
235 (if (zerop (aref status 9))
237 "\tSecret keys are imported.\n")))
238 (append-to-buffer pgg-output-buffer (point-min)(point-max))
239 (pgg-process-when-success)))
243 ;;; pgg-gpg.el ends here