1 ;;; pgg-pgp.el --- PGP 2.* and 6.* support for PGG.
3 ;; Copyright (C) 1999,2000 Daiki Ueno
5 ;; Author: Daiki Ueno <ueno@ueda.info.waseda.ac.jp>
7 ;; Keywords: PGP, OpenPGP
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, binary-write-decoded-region
29 (eval-when-compile (require 'pgg))
32 "PGP 2.* and 6.* interface"
35 (defcustom pgg-pgp-program "pgp"
36 "PGP 2.* and 6.* executable."
40 (defcustom pgg-pgp-shell-file-name "/bin/sh"
41 "File name to load inferior shells from.
42 Bourne shell or its equivalent \(not tcsh) is needed for \"2>\"."
46 (defcustom pgg-pgp-shell-command-switch "-c"
47 "Switch used to have the shell execute its command line argument."
51 (defcustom pgg-pgp-extra-args nil
52 "Extra arguments for every PGP invocation."
57 (luna-define-class pgg-scheme-pgp (pgg-scheme)))
59 (defvar pgg-pgp-user-id nil
60 "PGP ID of your default identity.")
62 (defvar pgg-pgp-messages-coding-system pgg-messages-coding-system
63 "Coding system used when reading from a PGP external process.")
65 (defvar pgg-scheme-pgp-instance nil)
68 (defun pgg-make-scheme-pgp ()
69 (or pgg-scheme-pgp-instance
70 (setq pgg-scheme-pgp-instance
71 (luna-make-entity 'pgg-scheme-pgp))))
73 (defun pgg-pgp-process-region (start end passphrase program args)
74 (let* ((errors-file-name
75 (concat temporary-file-directory
76 (make-temp-name "pgg-errors")))
80 (list (concat "2>" errors-file-name))))
81 (shell-file-name pgg-pgp-shell-file-name)
82 (shell-command-switch pgg-pgp-shell-command-switch)
83 (process-environment process-environment)
84 (output-buffer pgg-output-buffer)
85 (errors-buffer pgg-errors-buffer)
86 (process-connection-type nil)
87 process status exit-status)
88 (with-current-buffer (get-buffer-create output-buffer)
92 (setenv "PGPPASSFD" "0"))
96 (apply #'binary-to-text-funcall
97 pgg-pgp-messages-coding-system
98 #'start-process-shell-command "*PGP*" 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)))
122 (if (and process (eq 'run (process-status process)))
123 (interrupt-process process))
125 (delete-file errors-file-name)
128 (luna-define-method pgg-scheme-lookup-key ((scheme pgg-scheme-pgp)
129 string &optional type)
130 (let ((args (list "+batchmode" "+language=en" "-kv" string)))
131 (with-current-buffer (get-buffer-create pgg-output-buffer)
132 (buffer-disable-undo)
134 (apply #'call-process pgg-pgp-program nil t nil args)
135 (goto-char (point-min))
137 ((re-search-forward "^pub\\s +[0-9]+/" nil t);PGP 2.*
138 (buffer-substring (point)(+ 8 (point))))
139 ((re-search-forward "^Type" nil t);PGP 6.*
140 (beginning-of-line 2)
143 (buffer-substring (point)(progn (end-of-line) (point)))))
146 (luna-define-method pgg-scheme-encrypt-region ((scheme pgg-scheme-pgp)
147 start end recipients)
148 (let* ((pgg-pgp-user-id (or pgg-pgp-user-id pgg-default-user-id))
150 `("+encrypttoself=off +verbose=1" "+batchmode"
151 "+language=us" "-fate"
153 (mapcar (lambda (rcpt) (concat "\"" rcpt "\""))
155 (if pgg-encrypt-for-me
156 (list pgg-pgp-user-id))))))))
157 (pgg-pgp-process-region start end nil pgg-pgp-program args)
158 (pgg-process-when-success nil)))
160 (luna-define-method pgg-scheme-decrypt-region ((scheme pgg-scheme-pgp)
162 (let* ((pgg-pgp-user-id (or pgg-pgp-user-id pgg-default-user-id))
165 (format "PGP passphrase for %s: " pgg-pgp-user-id)
166 (pgg-scheme-lookup-key scheme pgg-pgp-user-id 'encrypt)))
168 '("+verbose=1" "+batchmode" "+language=us" "-f")))
169 (pgg-pgp-process-region start end passphrase pgg-pgp-program args)
170 (pgg-process-when-success nil)))
172 (luna-define-method pgg-scheme-sign-region ((scheme pgg-scheme-pgp)
173 start end &optional clearsign)
174 (let* ((pgg-pgp-user-id (or pgg-pgp-user-id pgg-default-user-id))
177 (format "PGP passphrase for %s: " pgg-pgp-user-id)
178 (pgg-scheme-lookup-key scheme pgg-pgp-user-id 'sign)))
180 (list (if clearsign "-fast" "-fbast")
181 "+verbose=1" "+language=us" "+batchmode"
182 "-u" pgg-pgp-user-id)))
183 (pgg-pgp-process-region start end passphrase pgg-pgp-program args)
184 (pgg-process-when-success
185 (goto-char (point-min))
186 (when (re-search-forward "^-+BEGIN PGP" nil t);XXX
188 (cdr (assq 2 (pgg-parse-armor-region
189 (progn (beginning-of-line 2)
192 (if pgg-cache-passphrase
193 (pgg-add-passphrase-cache
194 (cdr (assq 'key-identifier packet))
197 (luna-define-method pgg-scheme-verify-region ((scheme pgg-scheme-pgp)
198 start end &optional signature)
199 (let* ((basename (expand-file-name "pgg" temporary-file-directory))
200 (orig-file (make-temp-name basename))
201 (args '("+verbose=1" "+batchmode" "+language=us"))
202 (orig-mode (default-file-modes)))
205 (set-default-file-modes 448)
206 (binary-write-decoded-region start end orig-file))
207 (set-default-file-modes orig-mode))
208 (when (stringp signature)
209 (copy-file signature (setq signature (concat orig-file ".asc")))
210 (setq args (append args (list signature orig-file))))
211 (pgg-pgp-process-region (point)(point) nil pgg-pgp-program args)
212 (delete-file orig-file)
213 (if signature (delete-file signature))
214 (pgg-process-when-success
215 (goto-char (point-min))
216 (let ((case-fold-search t))
217 (while (re-search-forward "^warning: " nil t)
218 (delete-region (match-beginning 0)
219 (progn (beginning-of-line 2) (point)))))
220 (goto-char (point-min))
221 (when (re-search-forward "^\\.$" nil t)
222 (delete-region (point-min)
223 (progn (beginning-of-line 2)
226 (luna-define-method pgg-scheme-insert-key ((scheme pgg-scheme-pgp))
227 (let* ((pgg-pgp-user-id (or pgg-pgp-user-id pgg-default-user-id))
229 (list "+verbose=1" "+batchmode" "+language=us" "-kxaf"
230 (concat "\"" pgg-pgp-user-id "\""))))
231 (pgg-pgp-process-region (point)(point) nil pgg-pgp-program args)
232 (insert-buffer-substring pgg-output-buffer)))
234 (luna-define-method pgg-scheme-snarf-keys-region ((scheme pgg-scheme-pgp)
236 (let* ((pgg-pgp-user-id (or pgg-pgp-user-id pgg-default-user-id))
237 (basename (expand-file-name "pgg" temporary-file-directory))
238 (key-file (make-temp-name basename))
240 (list "+verbose=1" "+batchmode" "+language=us" "-kaf"
242 (let ((coding-system-for-write 'raw-text-dos))
243 (write-region start end key-file))
244 (pgg-pgp-process-region start end nil pgg-pgp-program args)
245 (delete-file key-file)
246 (pgg-process-when-success nil)))
250 ;;; pgg-pgp.el ends here