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[emacs.git] / lisp / pgg-pgp5.el
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1 ;;; pgg-pgp5.el --- PGP 5.* support for PGG.
3 ;; Copyright (C) 1999, 2000, 2002, 2003, 2004,
4 ;; 2005, 2006, 2007 Free Software Foundation, Inc.
6 ;; Author: Daiki Ueno <ueno@unixuser.org>
7 ;; Created: 1999/11/02
8 ;; Keywords: PGP, OpenPGP
10 ;; This file is part of GNU Emacs.
12 ;; GNU Emacs is free software; you can redistribute it and/or modify
13 ;; it under the terms of the GNU General Public License as published by
14 ;; the Free Software Foundation; either version 3, or (at your option)
15 ;; any later version.
17 ;; GNU Emacs is distributed in the hope that it will be useful,
18 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
19 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 ;; GNU General Public License for more details.
22 ;; You should have received a copy of the GNU General Public License
23 ;; along with GNU Emacs; see the file COPYING. If not, write to the
24 ;; Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
25 ;; Boston, MA 02110-1301, USA.
27 ;;; Code:
29 (eval-when-compile
30 (require 'cl) ; for pgg macros
31 (require 'pgg))
33 (defgroup pgg-pgp5 ()
34 "PGP 5.* interface."
35 :group 'pgg)
37 (defcustom pgg-pgp5-pgpe-program "pgpe"
38 "PGP 5.* 'pgpe' executable."
39 :group 'pgg-pgp5
40 :type 'string)
42 (defcustom pgg-pgp5-pgps-program "pgps"
43 "PGP 5.* 'pgps' executable."
44 :group 'pgg-pgp5
45 :type 'string)
47 (defcustom pgg-pgp5-pgpk-program "pgpk"
48 "PGP 5.* 'pgpk' executable."
49 :group 'pgg-pgp5
50 :type 'string)
52 (defcustom pgg-pgp5-pgpv-program "pgpv"
53 "PGP 5.* 'pgpv' executable."
54 :group 'pgg-pgp5
55 :type 'string)
57 (defcustom pgg-pgp5-shell-file-name "/bin/sh"
58 "File name to load inferior shells from.
59 Bourne shell or its equivalent \(not tcsh) is needed for \"2>\"."
60 :group 'pgg-pgp5
61 :type 'string)
63 (defcustom pgg-pgp5-shell-command-switch "-c"
64 "Switch used to have the shell execute its command line argument."
65 :group 'pgg-pgp5
66 :type 'string)
68 (defcustom pgg-pgp5-extra-args nil
69 "Extra arguments for every PGP 5.* invocation."
70 :group 'pgg-pgp5
71 :type '(choice
72 (const :tag "None" nil)
73 (string :tag "Arguments")))
75 (defvar pgg-pgp5-user-id nil
76 "PGP 5.* ID of your default identity.")
78 (defun pgg-pgp5-process-region (start end passphrase program args)
79 (let* ((errors-file-name (pgg-make-temp-file "pgg-errors"))
80 (args
81 (append args
82 pgg-pgp5-extra-args
83 (list (concat "2>" errors-file-name))))
84 (shell-file-name pgg-pgp5-shell-file-name)
85 (shell-command-switch pgg-pgp5-shell-command-switch)
86 (process-environment process-environment)
87 (output-buffer pgg-output-buffer)
88 (errors-buffer pgg-errors-buffer)
89 (process-connection-type nil)
90 process status exit-status)
91 (with-current-buffer (get-buffer-create output-buffer)
92 (buffer-disable-undo)
93 (erase-buffer))
94 (when passphrase
95 (setenv "PGPPASSFD" "0"))
96 (unwind-protect
97 (progn
98 (let ((coding-system-for-read 'binary)
99 (coding-system-for-write 'binary))
100 (setq process
101 (apply #'funcall
102 #'start-process-shell-command "*PGP*" output-buffer
103 program args)))
104 (set-process-sentinel process #'ignore)
105 (when passphrase
106 (process-send-string process (concat passphrase "\n")))
107 (process-send-region process start end)
108 (process-send-eof process)
109 (while (eq 'run (process-status process))
110 (accept-process-output process 5))
111 (setq status (process-status process)
112 exit-status (process-exit-status process))
113 (delete-process process)
114 (with-current-buffer output-buffer
115 (pgg-convert-lbt-region (point-min)(point-max) 'LF)
117 (if (memq status '(stop signal))
118 (error "%s exited abnormally: '%s'" program exit-status))
119 (if (= 127 exit-status)
120 (error "%s could not be found" program))
122 (set-buffer (get-buffer-create errors-buffer))
123 (buffer-disable-undo)
124 (erase-buffer)
125 (insert-file-contents errors-file-name)))
126 (if (and process (eq 'run (process-status process)))
127 (interrupt-process process))
128 (condition-case nil
129 (delete-file errors-file-name)
130 (file-error nil)))))
132 (defun pgg-pgp5-lookup-key (string &optional type)
133 "Search keys associated with STRING."
134 (let ((args (list "+language=en" "-l" string)))
135 (with-current-buffer (get-buffer-create pgg-output-buffer)
136 (buffer-disable-undo)
137 (erase-buffer)
138 (apply #'call-process pgg-pgp5-pgpk-program nil t nil args)
139 (goto-char (point-min))
140 (when (re-search-forward "^sec" nil t)
141 (substring
142 (nth 2 (split-string
143 (buffer-substring (match-end 0)(progn (end-of-line)(point)))))
144 2)))))
146 (defun pgg-pgp5-encrypt-region (start end recipients &optional sign passphrase)
147 "Encrypt the current region between START and END."
148 (let* ((pgg-pgp5-user-id (or pgg-pgp5-user-id pgg-default-user-id))
149 (passphrase (or passphrase
150 (when sign
151 (pgg-read-passphrase
152 (format "PGP passphrase for %s: "
153 pgg-pgp5-user-id)
154 pgg-pgp5-user-id))))
155 (args
156 (append
157 `("+NoBatchInvalidKeys=off" "-fat" "+batchmode=1"
158 ,@(if (or recipients pgg-encrypt-for-me)
159 (apply #'append
160 (mapcar (lambda (rcpt)
161 (list "-r"
162 (concat "\"" rcpt "\"")))
163 (append recipients
164 (if pgg-encrypt-for-me
165 (list pgg-pgp5-user-id)))))))
166 (if sign '("-s" "-u" pgg-pgp5-user-id)))))
167 (pgg-pgp5-process-region start end nil pgg-pgp5-pgpe-program args)
168 (pgg-process-when-success nil)))
170 (defun pgg-pgp5-decrypt-region (start end &optional passphrase)
171 "Decrypt the current region between START and END."
172 (let* ((pgg-pgp5-user-id (or pgg-pgp5-user-id pgg-default-user-id))
173 (passphrase
174 (or passphrase
175 (pgg-read-passphrase
176 (format "PGP passphrase for %s: " pgg-pgp5-user-id)
177 (pgg-pgp5-lookup-key pgg-pgp5-user-id 'encrypt))))
178 (args
179 '("+verbose=1" "+batchmode=1" "+language=us" "-f")))
180 (pgg-pgp5-process-region start end passphrase pgg-pgp5-pgpv-program args)
181 (pgg-process-when-success nil)))
183 (defun pgg-pgp5-sign-region (start end &optional clearsign passphrase)
184 "Make detached signature from text between START and END."
185 (let* ((pgg-pgp5-user-id (or pgg-pgp5-user-id pgg-default-user-id))
186 (passphrase
187 (or passphrase
188 (pgg-read-passphrase
189 (format "PGP passphrase for %s: " pgg-pgp5-user-id)
190 (pgg-pgp5-lookup-key pgg-pgp5-user-id 'sign))))
191 (args
192 (list (if clearsign "-fat" "-fbat")
193 "+verbose=1" "+language=us" "+batchmode=1"
194 "-u" pgg-pgp5-user-id)))
195 (pgg-pgp5-process-region start end passphrase pgg-pgp5-pgps-program args)
196 (pgg-process-when-success
197 (when (re-search-forward "^-+BEGIN PGP SIGNATURE" nil t);XXX
198 (let ((packet
199 (cdr (assq 2 (pgg-parse-armor-region
200 (progn (beginning-of-line 2)
201 (point))
202 (point-max))))))
203 (if pgg-cache-passphrase
204 (pgg-add-passphrase-to-cache
205 (cdr (assq 'key-identifier packet))
206 passphrase)))))))
208 (defun pgg-pgp5-verify-region (start end &optional signature)
209 "Verify region between START and END as the detached signature SIGNATURE."
210 (let ((orig-file (pgg-make-temp-file "pgg"))
211 (args '("+verbose=1" "+batchmode=1" "+language=us"))
212 (orig-mode (default-file-modes)))
213 (unwind-protect
214 (progn
215 (set-default-file-modes 448)
216 (let ((coding-system-for-write 'binary)
217 jka-compr-compression-info-list jam-zcat-filename-list)
218 (write-region start end orig-file)))
219 (set-default-file-modes orig-mode))
220 (when (stringp signature)
221 (copy-file signature (setq signature (concat orig-file ".asc")))
222 (setq args (append args (list signature))))
223 (pgg-pgp5-process-region (point)(point) nil pgg-pgp5-pgpv-program args)
224 (delete-file orig-file)
225 (if signature (delete-file signature))
226 (with-current-buffer pgg-errors-buffer
227 (goto-char (point-min))
228 (if (re-search-forward "^Good signature" nil t)
229 (progn
230 (set-buffer pgg-output-buffer)
231 (insert-buffer-substring pgg-errors-buffer)
233 nil))))
235 (defun pgg-pgp5-insert-key ()
236 "Insert public key at point."
237 (let* ((pgg-pgp5-user-id (or pgg-pgp5-user-id pgg-default-user-id))
238 (args
239 (list "+verbose=1" "+batchmode=1" "+language=us" "-x"
240 (concat "\"" pgg-pgp5-user-id "\""))))
241 (pgg-pgp5-process-region (point)(point) nil pgg-pgp5-pgpk-program args)
242 (insert-buffer-substring pgg-output-buffer)))
244 (defun pgg-pgp5-snarf-keys-region (start end)
245 "Add all public keys in region between START and END to the keyring."
246 (let* ((pgg-pgp5-user-id (or pgg-pgp5-user-id pgg-default-user-id))
247 (key-file (pgg-make-temp-file "pgg"))
248 (args
249 (list "+verbose=1" "+batchmode=1" "+language=us" "-a"
250 key-file)))
251 (let ((coding-system-for-write 'raw-text-dos))
252 (write-region start end key-file))
253 (pgg-pgp5-process-region start end nil pgg-pgp5-pgpk-program args)
254 (delete-file key-file)
255 (pgg-process-when-success nil)))
257 (provide 'pgg-pgp5)
259 ;;; arch-tag: 3dbd1073-6b3a-466c-9f55-5c587ffa6d7b
260 ;;; pgg-pgp5.el ends here