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 (eval-when-compile (require 'pgg))
31 "PGP 2.* and 6.* interface"
34 (defcustom pgg-pgp-program "pgp"
35 "PGP 2.* and 6.* executable."
39 (defcustom pgg-pgp-shell-file-name "/bin/sh"
40 "File name to load inferior shells from.
41 Bourne shell or its equivalent \(not tcsh) is needed for \"2>\"."
45 (defcustom pgg-pgp-shell-command-switch "-c"
46 "Switch used to have the shell execute its command line argument."
50 (defcustom pgg-pgp-extra-args nil
51 "Extra arguments for every PGP invocation."
56 (luna-define-class pgg-scheme-pgp (pgg-scheme)))
58 (defvar pgg-pgp-user-id nil
59 "PGP ID of your default identity.")
61 (defvar pgg-scheme-pgp-instance nil)
64 (defun pgg-make-scheme-pgp ()
65 (or pgg-scheme-pgp-instance
66 (setq pgg-scheme-pgp-instance
67 (luna-make-entity 'pgg-scheme-pgp))))
69 (defun pgg-pgp-process-region (start end passphrase program args)
70 (let* ((errors-file-name
71 (concat temporary-file-directory
72 (make-temp-name "pgg-errors")))
76 (list (concat "2>" errors-file-name))))
77 (shell-file-name pgg-pgp-shell-file-name)
78 (shell-command-switch pgg-pgp-shell-command-switch)
79 (output-buffer pgg-output-buffer)
80 (errors-buffer pgg-errors-buffer)
81 (process-connection-type nil)
82 process status exit-status)
83 (with-current-buffer (get-buffer-create output-buffer)
87 (setenv "PGPPASSFD" "0"))
90 (apply #'start-process-shell-command "*PGP*" output-buffer
92 (set-process-sentinel process #'ignore)
94 (process-send-string process (concat passphrase "\n")))
95 (process-send-region process start end)
96 (process-send-eof process)
97 (while (eq 'run (process-status process))
98 (accept-process-output process 5))
99 (setq status (process-status process)
100 exit-status (process-exit-status process))
101 (delete-process process)
102 (with-current-buffer output-buffer
103 (pgg-convert-lbt-region (point-min)(point-max) 'LF)
105 (if (memq status '(stop signal))
106 (error "%s exited abnormally: '%s'" program exit-status))
107 (if (= 127 exit-status)
108 (error "%s could not be found" program))
110 (set-buffer (get-buffer-create errors-buffer))
111 (buffer-disable-undo)
113 (insert-file-contents errors-file-name)
114 (delete-file errors-file-name)
116 (if (and process (eq 'run (process-status process)))
117 (interrupt-process process)))))
119 (luna-define-method pgg-scheme-lookup-key ((scheme pgg-scheme-pgp)
120 string &optional type)
121 (let ((args (list "+batchmode" "+language=en" "-kv" string)))
122 (with-current-buffer (get-buffer-create pgg-output-buffer)
123 (buffer-disable-undo)
125 (apply #'call-process pgg-pgp-program nil t nil args)
126 (goto-char (point-min))
128 ((re-search-forward "^pub\\s +[0-9]+/" nil t);PGP 2.*
129 (buffer-substring (point)(+ 8 (point))))
130 ((re-search-forward "^Type" nil t);PGP 6.*
131 (beginning-of-line 2)
134 (buffer-substring (point)(progn (end-of-line) (point)))))
137 (luna-define-method pgg-scheme-encrypt-region ((scheme pgg-scheme-pgp)
138 start end recipients)
139 (let* ((pgg-pgp-user-id (or pgg-pgp-user-id pgg-default-user-id))
141 `("+encrypttoself=off +verbose=1" "+batchmode"
142 "+language=us" "-fate"
144 (mapcar (lambda (rcpt) (concat "\"" rcpt "\""))
146 (if pgg-encrypt-for-me
147 (list pgg-pgp-user-id))))))))
148 (pgg-pgp-process-region start end nil pgg-pgp-program args)
149 (pgg-process-when-success nil)))
151 (luna-define-method pgg-scheme-decrypt-region ((scheme pgg-scheme-pgp)
153 (let* ((pgg-pgp-user-id (or pgg-pgp-user-id pgg-default-user-id))
156 (format "PGP passphrase for %s: " pgg-pgp-user-id)
157 (pgg-scheme-lookup-key scheme pgg-pgp-user-id 'encrypt)))
159 '("+verbose=1" "+batchmode" "+language=us" "-f")))
160 (pgg-pgp-process-region start end passphrase pgg-pgp-program args)
161 (pgg-process-when-success nil)))
163 (luna-define-method pgg-scheme-sign-region ((scheme pgg-scheme-pgp)
164 start end &optional clearsign)
165 (let* ((pgg-pgp-user-id (or pgg-pgp-user-id pgg-default-user-id))
168 (format "PGP passphrase for %s: " pgg-pgp-user-id)
169 (pgg-scheme-lookup-key scheme pgg-pgp-user-id 'sign)))
171 (list (if clearsign "-fast" "-fbast")
172 "+verbose=1" "+language=us" "+batchmode"
173 "-u" pgg-pgp-user-id)))
174 (pgg-pgp-process-region start end passphrase pgg-pgp-program args)
175 (pgg-process-when-success
176 (goto-char (point-min))
177 (when (re-search-forward "^-+BEGIN PGP" nil t);XXX
179 (cdr (assq 2 (pgg-parse-armor-region
180 (progn (beginning-of-line 2)
183 (if pgg-cache-passphrase
184 (pgg-add-passphrase-cache
185 (cdr (assq 'key-identifier packet))
188 (luna-define-method pgg-scheme-verify-region ((scheme pgg-scheme-pgp)
189 start end &optional signature)
190 (let* ((basename (expand-file-name "pgg" temporary-file-directory))
191 (orig-file (make-temp-name basename))
192 (args '("+verbose=1" "+batchmode" "+language=us"))
193 (orig-mode (default-file-modes)))
196 (set-default-file-modes 448)
197 (write-region-as-binary start end orig-file))
198 (set-default-file-modes orig-mode))
199 (when (stringp signature)
200 (copy-file signature (setq signature (concat orig-file ".asc")))
201 (setq args (append args (list signature orig-file))))
202 (pgg-pgp-process-region (point)(point) nil pgg-pgp-program args)
203 (delete-file orig-file)
204 (if signature (delete-file signature))
205 (pgg-process-when-success
206 (goto-char (point-min))
207 (let ((case-fold-search t))
208 (while (re-search-forward "^warning: " nil t)
209 (delete-region (match-beginning 0)
210 (progn (beginning-of-line 2) (point)))))
211 (goto-char (point-min))
212 (when (re-search-forward "^\\.$" nil t)
213 (delete-region (point-min)
214 (progn (beginning-of-line 2)
217 (luna-define-method pgg-scheme-insert-key ((scheme pgg-scheme-pgp))
218 (let* ((pgg-pgp-user-id (or pgg-pgp-user-id pgg-default-user-id))
220 (list "+verbose=1" "+batchmode" "+language=us" "-kxaf"
221 (concat "\"" pgg-pgp-user-id "\""))))
222 (pgg-pgp-process-region (point)(point) nil pgg-pgp-program args)
223 (insert-buffer-substring pgg-output-buffer)))
225 (luna-define-method pgg-scheme-snarf-keys-region ((scheme pgg-scheme-pgp)
227 (let* ((pgg-pgp-user-id (or pgg-pgp-user-id pgg-default-user-id))
228 (basename (expand-file-name "pgg" temporary-file-directory))
229 (key-file (make-temp-name basename))
231 (list "+verbose=1" "+batchmode" "+language=us" "-kaf"
233 (write-region-as-raw-text-CRLF start end key-file)
234 (pgg-pgp-process-region start end nil pgg-pgp-program args)
235 (delete-file key-file)
236 (pgg-process-when-success nil)))
240 ;;; pgg-pgp.el ends here