1 ;;; pgg-pgp.el --- PGP 2.* and 6.* support for PGG.
3 ;; Copyright (C) 1999,2000 Free Software Foundation, Inc.
5 ;; Author: Daiki Ueno <ueno@unixuser.org>
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-scheme-pgp-instance nil)
65 (defun pgg-make-scheme-pgp ()
66 (or pgg-scheme-pgp-instance
67 (setq pgg-scheme-pgp-instance
68 (luna-make-entity 'pgg-scheme-pgp))))
70 (defun pgg-pgp-process-region (start end passphrase program args)
71 (let* ((errors-file-name
72 (concat temporary-file-directory
73 (make-temp-name "pgg-errors")))
77 (list (concat "2>" errors-file-name))))
78 (shell-file-name pgg-pgp-shell-file-name)
79 (shell-command-switch pgg-pgp-shell-command-switch)
80 (process-environment process-environment)
81 (output-buffer pgg-output-buffer)
82 (errors-buffer pgg-errors-buffer)
83 (process-connection-type nil)
84 process status exit-status)
85 (with-current-buffer (get-buffer-create output-buffer)
89 (setenv "PGPPASSFD" "0"))
93 (apply #'binary-funcall
94 #'start-process-shell-command "*PGP*" output-buffer
96 (set-process-sentinel process #'ignore)
98 (process-send-string process (concat passphrase "\n")))
99 (process-send-region process start end)
100 (process-send-eof process)
101 (while (eq 'run (process-status process))
102 (accept-process-output process 5))
103 (setq status (process-status process)
104 exit-status (process-exit-status process))
105 (delete-process process)
106 (with-current-buffer output-buffer
107 (pgg-convert-lbt-region (point-min)(point-max) 'LF)
109 (if (memq status '(stop signal))
110 (error "%s exited abnormally: '%s'" program exit-status))
111 (if (= 127 exit-status)
112 (error "%s could not be found" program))
114 (set-buffer (get-buffer-create errors-buffer))
115 (buffer-disable-undo)
117 (insert-file-contents errors-file-name)))
118 (if (and process (eq 'run (process-status process)))
119 (interrupt-process process))
121 (delete-file errors-file-name)
124 (luna-define-method pgg-scheme-lookup-key ((scheme pgg-scheme-pgp)
125 string &optional type)
126 (let ((args (list "+batchmode" "+language=en" "-kv" string)))
127 (with-current-buffer (get-buffer-create pgg-output-buffer)
128 (buffer-disable-undo)
130 (apply #'call-process pgg-pgp-program nil t nil args)
131 (goto-char (point-min))
133 ((re-search-forward "^pub\\s +[0-9]+/" nil t);PGP 2.*
134 (buffer-substring (point)(+ 8 (point))))
135 ((re-search-forward "^Type" nil t);PGP 6.*
136 (beginning-of-line 2)
139 (buffer-substring (point)(progn (end-of-line) (point)))))
142 (luna-define-method pgg-scheme-encrypt-region ((scheme pgg-scheme-pgp)
143 start end recipients)
144 (let* ((pgg-pgp-user-id (or pgg-pgp-user-id pgg-default-user-id))
146 `("+encrypttoself=off +verbose=1" "+batchmode"
147 "+language=us" "-fate"
149 (mapcar (lambda (rcpt) (concat "\"" rcpt "\""))
151 (if pgg-encrypt-for-me
152 (list pgg-pgp-user-id))))))))
153 (pgg-pgp-process-region start end nil pgg-pgp-program args)
154 (pgg-process-when-success nil)))
156 (luna-define-method pgg-scheme-decrypt-region ((scheme pgg-scheme-pgp)
158 (let* ((pgg-pgp-user-id (or pgg-pgp-user-id pgg-default-user-id))
161 (format "PGP passphrase for %s: " pgg-pgp-user-id)
162 (pgg-scheme-lookup-key scheme pgg-pgp-user-id 'encrypt)))
164 '("+verbose=1" "+batchmode" "+language=us" "-f")))
165 (pgg-pgp-process-region start end passphrase pgg-pgp-program args)
166 (pgg-process-when-success nil)))
168 (luna-define-method pgg-scheme-sign-region ((scheme pgg-scheme-pgp)
169 start end &optional clearsign)
170 (let* ((pgg-pgp-user-id (or pgg-pgp-user-id pgg-default-user-id))
173 (format "PGP passphrase for %s: " pgg-pgp-user-id)
174 (pgg-scheme-lookup-key scheme pgg-pgp-user-id 'sign)))
176 (list (if clearsign "-fast" "-fbast")
177 "+verbose=1" "+language=us" "+batchmode"
178 "-u" pgg-pgp-user-id)))
179 (pgg-pgp-process-region start end passphrase pgg-pgp-program args)
180 (pgg-process-when-success
181 (goto-char (point-min))
182 (when (re-search-forward "^-+BEGIN PGP" nil t);XXX
184 (cdr (assq 2 (pgg-parse-armor-region
185 (progn (beginning-of-line 2)
188 (if pgg-cache-passphrase
189 (pgg-add-passphrase-cache
190 (cdr (assq 'key-identifier packet))
193 (luna-define-method pgg-scheme-verify-region ((scheme pgg-scheme-pgp)
194 start end &optional signature)
195 (let* ((basename (expand-file-name "pgg" temporary-file-directory))
196 (orig-file (make-temp-name basename))
197 (args '("+verbose=1" "+batchmode" "+language=us"))
198 (orig-mode (default-file-modes)))
201 (set-default-file-modes 448)
202 (binary-write-decoded-region start end orig-file))
203 (set-default-file-modes orig-mode))
204 (when (stringp signature)
205 (copy-file signature (setq signature (concat orig-file ".asc")))
206 (setq args (append args (list signature orig-file))))
207 (pgg-pgp-process-region (point)(point) nil pgg-pgp-program args)
208 (delete-file orig-file)
209 (if signature (delete-file signature))
210 (pgg-process-when-success
211 (goto-char (point-min))
212 (let ((case-fold-search t))
213 (while (re-search-forward "^warning: " nil t)
214 (delete-region (match-beginning 0)
215 (progn (beginning-of-line 2) (point)))))
216 (goto-char (point-min))
217 (when (re-search-forward "^\\.$" nil t)
218 (delete-region (point-min)
219 (progn (beginning-of-line 2)
222 (luna-define-method pgg-scheme-insert-key ((scheme pgg-scheme-pgp))
223 (let* ((pgg-pgp-user-id (or pgg-pgp-user-id pgg-default-user-id))
225 (list "+verbose=1" "+batchmode" "+language=us" "-kxaf"
226 (concat "\"" pgg-pgp-user-id "\""))))
227 (pgg-pgp-process-region (point)(point) nil pgg-pgp-program args)
228 (insert-buffer-substring pgg-output-buffer)))
230 (luna-define-method pgg-scheme-snarf-keys-region ((scheme pgg-scheme-pgp)
232 (let* ((pgg-pgp-user-id (or pgg-pgp-user-id pgg-default-user-id))
233 (basename (expand-file-name "pgg" temporary-file-directory))
234 (key-file (make-temp-name basename))
236 (list "+verbose=1" "+batchmode" "+language=us" "-kaf"
238 (let ((coding-system-for-write 'raw-text-dos))
239 (write-region start end key-file))
240 (pgg-pgp-process-region start end nil pgg-pgp-program args)
241 (delete-file key-file)
242 (pgg-process-when-success nil)))
246 ;;; pgg-pgp.el ends here