* src/emacs.c (syms_of_emacs) <system-type>: Doc fix.
[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, 2008, 2009, 2010 Free Software Foundation, Inc.
6 ;; Author: Daiki Ueno <ueno@unixuser.org>
7 ;; Created: 1999/11/02
8 ;; Keywords: PGP, OpenPGP
9 ;; Package: pgg
11 ;; This file is part of GNU Emacs.
13 ;; GNU Emacs is free software: you can redistribute it and/or modify
14 ;; it under the terms of the GNU General Public License as published by
15 ;; the Free Software Foundation, either version 3 of the License, or
16 ;; (at your option) any later version.
18 ;; GNU Emacs is distributed in the hope that it will be useful,
19 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
20 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
21 ;; GNU General Public License for more details.
23 ;; You should have received a copy of the GNU General Public License
24 ;; along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
26 ;;; Code:
28 (eval-when-compile
29 (require 'cl) ; for pgg macros
30 (require 'pgg))
32 (defgroup pgg-pgp5 ()
33 "PGP 5.* interface."
34 :group 'pgg)
36 (defcustom pgg-pgp5-pgpe-program "pgpe"
37 "PGP 5.* 'pgpe' executable."
38 :group 'pgg-pgp5
39 :type 'string)
41 (defcustom pgg-pgp5-pgps-program "pgps"
42 "PGP 5.* 'pgps' executable."
43 :group 'pgg-pgp5
44 :type 'string)
46 (defcustom pgg-pgp5-pgpk-program "pgpk"
47 "PGP 5.* 'pgpk' executable."
48 :group 'pgg-pgp5
49 :type 'string)
51 (defcustom pgg-pgp5-pgpv-program "pgpv"
52 "PGP 5.* 'pgpv' executable."
53 :group 'pgg-pgp5
54 :type 'string)
56 (defcustom pgg-pgp5-shell-file-name "/bin/sh"
57 "File name to load inferior shells from.
58 Bourne shell or its equivalent \(not tcsh) is needed for \"2>\"."
59 :group 'pgg-pgp5
60 :type 'string)
62 (defcustom pgg-pgp5-shell-command-switch "-c"
63 "Switch used to have the shell execute its command line argument."
64 :group 'pgg-pgp5
65 :type 'string)
67 (defcustom pgg-pgp5-extra-args nil
68 "Extra arguments for every PGP 5.* invocation."
69 :group 'pgg-pgp5
70 :type '(choice
71 (const :tag "None" nil)
72 (string :tag "Arguments")))
74 (defvar pgg-pgp5-user-id nil
75 "PGP 5.* ID of your default identity.")
77 (defun pgg-pgp5-process-region (start end passphrase program args)
78 (let* ((errors-file-name (pgg-make-temp-file "pgg-errors"))
79 (args
80 (append args
81 pgg-pgp5-extra-args
82 (list (concat "2>" errors-file-name))))
83 (shell-file-name pgg-pgp5-shell-file-name)
84 (shell-command-switch pgg-pgp5-shell-command-switch)
85 (process-environment process-environment)
86 (output-buffer pgg-output-buffer)
87 (errors-buffer pgg-errors-buffer)
88 (process-connection-type nil)
89 process status exit-status)
90 (with-current-buffer (get-buffer-create output-buffer)
91 (buffer-disable-undo)
92 (erase-buffer))
93 (when passphrase
94 (setenv "PGPPASSFD" "0"))
95 (unwind-protect
96 (progn
97 (let ((coding-system-for-read 'binary)
98 (coding-system-for-write 'binary))
99 (setq process
100 (apply #'funcall
101 #'start-process-shell-command "*PGP*" output-buffer
102 program args)))
103 (set-process-sentinel process #'ignore)
104 (when passphrase
105 (process-send-string process (concat passphrase "\n")))
106 (process-send-region process start end)
107 (process-send-eof process)
108 (while (eq 'run (process-status process))
109 (accept-process-output process 5))
110 (setq status (process-status process)
111 exit-status (process-exit-status process))
112 (delete-process process)
113 (with-current-buffer output-buffer
114 (pgg-convert-lbt-region (point-min)(point-max) 'LF)
116 (if (memq status '(stop signal))
117 (error "%s exited abnormally: '%s'" program exit-status))
118 (if (= 127 exit-status)
119 (error "%s could not be found" program))
121 (set-buffer (get-buffer-create errors-buffer))
122 (buffer-disable-undo)
123 (erase-buffer)
124 (insert-file-contents errors-file-name)))
125 (if (and process (eq 'run (process-status process)))
126 (interrupt-process process))
127 (condition-case nil
128 (delete-file errors-file-name)
129 (file-error nil)))))
131 (defun pgg-pgp5-lookup-key (string &optional type)
132 "Search keys associated with STRING."
133 (let ((args (list "+language=en" "-l" string)))
134 (with-current-buffer (get-buffer-create pgg-output-buffer)
135 (buffer-disable-undo)
136 (erase-buffer)
137 (apply #'call-process pgg-pgp5-pgpk-program nil t nil args)
138 (goto-char (point-min))
139 (when (re-search-forward "^sec" nil t)
140 (substring
141 (nth 2 (split-string
142 (buffer-substring (match-end 0)(progn (end-of-line)(point)))))
143 2)))))
145 (defun pgg-pgp5-encrypt-region (start end recipients &optional sign passphrase)
146 "Encrypt the current region between START and END."
147 (let* ((pgg-pgp5-user-id (or pgg-pgp5-user-id pgg-default-user-id))
148 (passphrase (or passphrase
149 (when sign
150 (pgg-read-passphrase
151 (format "PGP passphrase for %s: "
152 pgg-pgp5-user-id)
153 pgg-pgp5-user-id))))
154 (args
155 (append
156 `("+NoBatchInvalidKeys=off" "-fat" "+batchmode=1"
157 ,@(if (or recipients pgg-encrypt-for-me)
158 (apply #'append
159 (mapcar (lambda (rcpt)
160 (list "-r"
161 (concat "\"" rcpt "\"")))
162 (append recipients
163 (if pgg-encrypt-for-me
164 (list pgg-pgp5-user-id)))))))
165 (if sign '("-s" "-u" pgg-pgp5-user-id)))))
166 (pgg-pgp5-process-region start end nil pgg-pgp5-pgpe-program args)
167 (pgg-process-when-success nil)))
169 (defun pgg-pgp5-decrypt-region (start end &optional passphrase)
170 "Decrypt the current region between START and END."
171 (let* ((pgg-pgp5-user-id (or pgg-pgp5-user-id pgg-default-user-id))
172 (passphrase
173 (or passphrase
174 (pgg-read-passphrase
175 (format "PGP passphrase for %s: " pgg-pgp5-user-id)
176 (pgg-pgp5-lookup-key pgg-pgp5-user-id 'encrypt))))
177 (args
178 '("+verbose=1" "+batchmode=1" "+language=us" "-f")))
179 (pgg-pgp5-process-region start end passphrase pgg-pgp5-pgpv-program args)
180 (pgg-process-when-success nil)))
182 (defun pgg-pgp5-sign-region (start end &optional clearsign passphrase)
183 "Make detached signature from text between START and END."
184 (let* ((pgg-pgp5-user-id (or pgg-pgp5-user-id pgg-default-user-id))
185 (passphrase
186 (or passphrase
187 (pgg-read-passphrase
188 (format "PGP passphrase for %s: " pgg-pgp5-user-id)
189 (pgg-pgp5-lookup-key pgg-pgp5-user-id 'sign))))
190 (args
191 (list (if clearsign "-fat" "-fbat")
192 "+verbose=1" "+language=us" "+batchmode=1"
193 "-u" pgg-pgp5-user-id)))
194 (pgg-pgp5-process-region start end passphrase pgg-pgp5-pgps-program args)
195 (pgg-process-when-success
196 (when (re-search-forward "^-+BEGIN PGP SIGNATURE" nil t);XXX
197 (let ((packet
198 (cdr (assq 2 (pgg-parse-armor-region
199 (progn (beginning-of-line 2)
200 (point))
201 (point-max))))))
202 (if pgg-cache-passphrase
203 (pgg-add-passphrase-to-cache
204 (cdr (assq 'key-identifier packet))
205 passphrase)))))))
207 (defun pgg-pgp5-verify-region (start end &optional signature)
208 "Verify region between START and END as the detached signature SIGNATURE."
209 (let ((orig-file (pgg-make-temp-file "pgg"))
210 (args '("+verbose=1" "+batchmode=1" "+language=us"))
211 (orig-mode (default-file-modes)))
212 (unwind-protect
213 (progn
214 (set-default-file-modes 448)
215 (let ((coding-system-for-write 'binary)
216 jka-compr-compression-info-list jam-zcat-filename-list)
217 (write-region start end orig-file)))
218 (set-default-file-modes orig-mode))
219 (when (stringp signature)
220 (copy-file signature (setq signature (concat orig-file ".asc")))
221 (setq args (append args (list signature))))
222 (pgg-pgp5-process-region (point)(point) nil pgg-pgp5-pgpv-program args)
223 (delete-file orig-file)
224 (if signature (delete-file signature))
225 (with-current-buffer pgg-errors-buffer
226 (goto-char (point-min))
227 (if (re-search-forward "^Good signature" nil t)
228 (progn
229 (set-buffer pgg-output-buffer)
230 (insert-buffer-substring pgg-errors-buffer)
232 nil))))
234 (defun pgg-pgp5-insert-key ()
235 "Insert public key at point."
236 (let* ((pgg-pgp5-user-id (or pgg-pgp5-user-id pgg-default-user-id))
237 (args
238 (list "+verbose=1" "+batchmode=1" "+language=us" "-x"
239 (concat "\"" pgg-pgp5-user-id "\""))))
240 (pgg-pgp5-process-region (point)(point) nil pgg-pgp5-pgpk-program args)
241 (insert-buffer-substring pgg-output-buffer)))
243 (defun pgg-pgp5-snarf-keys-region (start end)
244 "Add all public keys in region between START and END to the keyring."
245 (let* ((pgg-pgp5-user-id (or pgg-pgp5-user-id pgg-default-user-id))
246 (key-file (pgg-make-temp-file "pgg"))
247 (args
248 (list "+verbose=1" "+batchmode=1" "+language=us" "-a"
249 key-file)))
250 (let ((coding-system-for-write 'raw-text-dos))
251 (write-region start end key-file))
252 (pgg-pgp5-process-region start end nil pgg-pgp5-pgpk-program args)
253 (delete-file key-file)
254 (pgg-process-when-success nil)))
256 (provide 'pgg-pgp5)
258 ;;; pgg-pgp5.el ends here