1 ;;; pgg-pgp.el --- PGP 2.* and 6.* support for PGG.
3 ;; Copyright (C) 1999, 2000, 2002, 2003, 2004,
4 ;; 2005, 2006, 2007, 2008, 2009 Free Software Foundation, Inc.
6 ;; Author: Daiki Ueno <ueno@unixuser.org>
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 of the License, or
15 ;; (at your option) 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. If not, see <http://www.gnu.org/licenses/>.
28 (require 'cl) ; for pgg macros
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."
55 (const :tag "None" nil)
56 (string :tag "Arguments")))
58 (defvar pgg-pgp-user-id nil
59 "PGP ID of your default identity.")
61 (defun pgg-pgp-process-region (start end passphrase program args)
62 (let* ((errors-file-name (pgg-make-temp-file "pgg-errors"))
66 " 2>" (shell-quote-argument errors-file-name)))
67 (shell-file-name pgg-pgp-shell-file-name)
68 (shell-command-switch pgg-pgp-shell-command-switch)
69 (process-environment process-environment)
70 (output-buffer pgg-output-buffer)
71 (errors-buffer pgg-errors-buffer)
72 (process-connection-type nil)
73 process status exit-status)
74 (with-current-buffer (get-buffer-create output-buffer)
78 (setenv "PGPPASSFD" "0"))
81 (let ((coding-system-for-read 'binary)
82 (coding-system-for-write 'binary))
84 (start-process-shell-command "*PGP*" output-buffer
85 (concat program " " args))))
86 (set-process-sentinel process #'ignore)
88 (process-send-string process (concat passphrase "\n")))
89 (process-send-region process start end)
90 (process-send-eof process)
91 (while (eq 'run (process-status process))
92 (accept-process-output process 5))
93 (setq status (process-status process)
94 exit-status (process-exit-status process))
95 (delete-process process)
96 (with-current-buffer output-buffer
97 (pgg-convert-lbt-region (point-min)(point-max) 'LF)
99 (if (memq status '(stop signal))
100 (error "%s exited abnormally: '%s'" program exit-status))
101 (if (= 127 exit-status)
102 (error "%s could not be found" program))
104 (set-buffer (get-buffer-create errors-buffer))
105 (buffer-disable-undo)
107 (insert-file-contents errors-file-name)))
108 (if (and process (eq 'run (process-status process)))
109 (interrupt-process process))
111 (delete-file errors-file-name)
114 (defun pgg-pgp-lookup-key (string &optional type)
115 "Search keys associated with STRING."
116 (let ((args (list "+batchmode" "+language=en" "-kv" string)))
117 (with-current-buffer (get-buffer-create pgg-output-buffer)
118 (buffer-disable-undo)
120 (apply #'call-process pgg-pgp-program nil t nil args)
121 (goto-char (point-min))
123 ((re-search-forward "^pub\\s +[0-9]+/" nil t);PGP 2.*
124 (buffer-substring (point)(+ 8 (point))))
125 ((re-search-forward "^Type" nil t);PGP 6.*
126 (beginning-of-line 2)
129 (buffer-substring (point)(progn (end-of-line) (point)))))
132 (defun pgg-pgp-encrypt-region (start end recipients &optional sign passphrase)
133 "Encrypt the current region between START and END."
134 (let* ((pgg-pgp-user-id (or pgg-pgp-user-id pgg-default-user-id))
135 (passphrase (or passphrase
138 (format "PGP passphrase for %s: "
143 "+encrypttoself=off +verbose=1 +batchmode +language=us -fate "
144 (if (or recipients pgg-encrypt-for-me)
145 (mapconcat 'shell-quote-argument
147 (if pgg-encrypt-for-me
148 (list pgg-pgp-user-id)))))
149 (if sign (concat " -s -u " (shell-quote-argument pgg-pgp-user-id))))))
150 (pgg-pgp-process-region start end nil pgg-pgp-program args)
151 (pgg-process-when-success nil)))
153 (defun pgg-pgp-decrypt-region (start end &optional passphrase)
154 "Decrypt the current region between START and END.
156 If optional PASSPHRASE is not specified, it will be obtained from the
157 passphrase cache or user."
158 (let* ((pgg-pgp-user-id (or pgg-pgp-user-id pgg-default-user-id))
159 (key (pgg-pgp-lookup-key pgg-pgp-user-id 'encrypt))
163 (format "PGP passphrase for %s: " pgg-pgp-user-id) key)))
165 "+verbose=1 +batchmode +language=us -f"))
166 (pgg-pgp-process-region start end passphrase pgg-pgp-program args)
167 (pgg-process-when-success
168 (if pgg-cache-passphrase
169 (pgg-add-passphrase-to-cache key passphrase)))))
171 (defun pgg-pgp-sign-region (start end &optional clearsign passphrase)
172 "Make detached signature from text between START and END.
174 If optional PASSPHRASE is not specified, it will be obtained from the
175 passphrase cache or user."
176 (let* ((pgg-pgp-user-id (or pgg-pgp-user-id pgg-default-user-id))
180 (format "PGP passphrase for %s: " pgg-pgp-user-id)
181 (pgg-pgp-lookup-key pgg-pgp-user-id 'sign))))
183 (concat (if clearsign "-fast" "-fbast")
184 " +verbose=1 +language=us +batchmode"
185 " -u " (shell-quote-argument pgg-pgp-user-id))))
186 (pgg-pgp-process-region start end passphrase pgg-pgp-program args)
187 (pgg-process-when-success
188 (goto-char (point-min))
189 (when (re-search-forward "^-+BEGIN PGP" nil t);XXX
191 (cdr (assq 2 (pgg-parse-armor-region
192 (progn (beginning-of-line 2)
195 (if pgg-cache-passphrase
196 (pgg-add-passphrase-to-cache
197 (cdr (assq 'key-identifier packet))
200 (defun pgg-pgp-verify-region (start end &optional signature)
201 "Verify region between START and END as the detached signature SIGNATURE."
202 (let* ((orig-file (pgg-make-temp-file "pgg"))
203 (args "+verbose=1 +batchmode +language=us")
204 (orig-mode (default-file-modes)))
207 (set-default-file-modes 448)
208 (let ((coding-system-for-write 'binary)
209 jka-compr-compression-info-list jam-zcat-filename-list)
210 (write-region start end orig-file)))
211 (set-default-file-modes orig-mode))
212 (if (stringp signature)
214 (copy-file signature (setq signature (concat orig-file ".asc")))
215 (setq args (concat args " " (shell-quote-argument signature)))))
216 (setq args (concat args " " (shell-quote-argument orig-file)))
217 (pgg-pgp-process-region (point)(point) nil pgg-pgp-program args)
218 (delete-file orig-file)
219 (if signature (delete-file signature))
220 (pgg-process-when-success
221 (goto-char (point-min))
222 (let ((case-fold-search t))
223 (while (re-search-forward "^warning: " nil t)
224 (delete-region (match-beginning 0)
225 (progn (beginning-of-line 2) (point)))))
226 (goto-char (point-min))
227 (when (re-search-forward "^\\.$" nil t)
228 (delete-region (point-min)
229 (progn (beginning-of-line 2)
232 (defun pgg-pgp-insert-key ()
233 "Insert public key at point."
234 (let* ((pgg-pgp-user-id (or pgg-pgp-user-id pgg-default-user-id))
236 (concat "+verbose=1 +batchmode +language=us -kxaf "
237 (shell-quote-argument pgg-pgp-user-id))))
238 (pgg-pgp-process-region (point)(point) nil pgg-pgp-program args)
239 (insert-buffer-substring pgg-output-buffer)))
241 (defun pgg-pgp-snarf-keys-region (start end)
242 "Add all public keys in region between START and END to the keyring."
243 (let* ((pgg-pgp-user-id (or pgg-pgp-user-id pgg-default-user-id))
244 (key-file (pgg-make-temp-file "pgg"))
246 (concat "+verbose=1 +batchmode +language=us -kaf "
247 (shell-quote-argument key-file))))
248 (let ((coding-system-for-write 'raw-text-dos))
249 (write-region start end key-file))
250 (pgg-pgp-process-region start end nil pgg-pgp-program args)
251 (delete-file key-file)
252 (pgg-process-when-success nil)))
256 ;; arch-tag: 076b7801-37b2-49a6-97c3-218fdecde33c
257 ;;; pgg-pgp.el ends here