1 ;;; pgg-pgp.el --- PGP 2.* and 6.* support for PGG.
3 ;; Copyright (C) 1999, 2000, 2002, 2003, 2004, 2005, 2006, 2007, 2008,
4 ;; 2009, 2010, 2011, 2012 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 (let ((delete-by-moving-to-trash nil
))
112 (delete-file errors-file-name
))
115 (defun pgg-pgp-lookup-key (string &optional type
)
116 "Search keys associated with STRING."
117 (let ((args (list "+batchmode" "+language=en" "-kv" string
)))
118 (with-current-buffer (get-buffer-create pgg-output-buffer
)
119 (buffer-disable-undo)
121 (apply #'call-process pgg-pgp-program nil t nil args
)
122 (goto-char (point-min))
124 ((re-search-forward "^pub\\s +[0-9]+/" nil t
);PGP 2.*
125 (buffer-substring (point)(+ 8 (point))))
126 ((re-search-forward "^Type" nil t
);PGP 6.*
127 (beginning-of-line 2)
130 (buffer-substring (point)(progn (end-of-line) (point)))))
133 (defun pgg-pgp-encrypt-region (start end recipients
&optional sign passphrase
)
134 "Encrypt the current region between START and END."
135 (let* ((pgg-pgp-user-id (or pgg-pgp-user-id pgg-default-user-id
))
136 (passphrase (or passphrase
139 (format "PGP passphrase for %s: "
144 "+encrypttoself=off +verbose=1 +batchmode +language=us -fate "
145 (if (or recipients pgg-encrypt-for-me
)
146 (mapconcat 'shell-quote-argument
148 (if pgg-encrypt-for-me
149 (list pgg-pgp-user-id
))) " "))
150 (if sign
(concat " -s -u " (shell-quote-argument pgg-pgp-user-id
))))))
151 (pgg-pgp-process-region start end nil pgg-pgp-program args
)
152 (pgg-process-when-success nil
)))
154 (defun pgg-pgp-decrypt-region (start end
&optional passphrase
)
155 "Decrypt the current region between START and END.
157 If optional PASSPHRASE is not specified, it will be obtained from the
158 passphrase cache or user."
159 (let* ((pgg-pgp-user-id (or pgg-pgp-user-id pgg-default-user-id
))
160 (key (pgg-pgp-lookup-key pgg-pgp-user-id
'encrypt
))
164 (format "PGP passphrase for %s: " pgg-pgp-user-id
) key
)))
166 "+verbose=1 +batchmode +language=us -f"))
167 (pgg-pgp-process-region start end passphrase pgg-pgp-program args
)
168 (pgg-process-when-success
169 (if pgg-cache-passphrase
170 (pgg-add-passphrase-to-cache key passphrase
)))))
172 (defun pgg-pgp-sign-region (start end
&optional clearsign passphrase
)
173 "Make detached signature from text between START and END.
175 If optional PASSPHRASE is not specified, it will be obtained from the
176 passphrase cache or user."
177 (let* ((pgg-pgp-user-id (or pgg-pgp-user-id pgg-default-user-id
))
181 (format "PGP passphrase for %s: " pgg-pgp-user-id
)
182 (pgg-pgp-lookup-key pgg-pgp-user-id
'sign
))))
184 (concat (if clearsign
"-fast" "-fbast")
185 " +verbose=1 +language=us +batchmode"
186 " -u " (shell-quote-argument pgg-pgp-user-id
))))
187 (pgg-pgp-process-region start end passphrase pgg-pgp-program args
)
188 (pgg-process-when-success
189 (goto-char (point-min))
190 (when (re-search-forward "^-+BEGIN PGP" nil t
);XXX
192 (cdr (assq 2 (pgg-parse-armor-region
193 (progn (beginning-of-line 2)
196 (if pgg-cache-passphrase
197 (pgg-add-passphrase-to-cache
198 (cdr (assq 'key-identifier packet
))
201 (defun pgg-pgp-verify-region (start end
&optional signature
)
202 "Verify region between START and END as the detached signature SIGNATURE."
203 (let* ((orig-file (pgg-make-temp-file "pgg"))
204 (args "+verbose=1 +batchmode +language=us")
205 (orig-mode (default-file-modes)))
208 (set-default-file-modes 448)
209 (let ((coding-system-for-write 'binary
)
210 jka-compr-compression-info-list jam-zcat-filename-list
)
211 (write-region start end orig-file
)))
212 (set-default-file-modes orig-mode
))
213 (if (stringp signature
)
215 (copy-file signature
(setq signature
(concat orig-file
".asc")))
216 (setq args
(concat args
" " (shell-quote-argument signature
)))))
217 (setq args
(concat args
" " (shell-quote-argument orig-file
)))
218 (pgg-pgp-process-region (point)(point) nil pgg-pgp-program args
)
219 (let ((delete-by-moving-to-trash nil
))
220 (delete-file orig-file
))
222 (let ((delete-by-moving-to-trash nil
))
223 (delete-file signature
)))
224 (pgg-process-when-success
225 (goto-char (point-min))
226 (let ((case-fold-search t
))
227 (while (re-search-forward "^warning: " nil t
)
228 (delete-region (match-beginning 0)
229 (progn (beginning-of-line 2) (point)))))
230 (goto-char (point-min))
231 (when (re-search-forward "^\\.$" nil t
)
232 (delete-region (point-min)
233 (progn (beginning-of-line 2)
236 (defun pgg-pgp-insert-key ()
237 "Insert public key at point."
238 (let* ((pgg-pgp-user-id (or pgg-pgp-user-id pgg-default-user-id
))
240 (concat "+verbose=1 +batchmode +language=us -kxaf "
241 (shell-quote-argument pgg-pgp-user-id
))))
242 (pgg-pgp-process-region (point)(point) nil pgg-pgp-program args
)
243 (insert-buffer-substring pgg-output-buffer
)))
245 (defun pgg-pgp-snarf-keys-region (start end
)
246 "Add all public keys in region between START and END to the keyring."
247 (let* ((pgg-pgp-user-id (or pgg-pgp-user-id pgg-default-user-id
))
248 (key-file (pgg-make-temp-file "pgg"))
250 (concat "+verbose=1 +batchmode +language=us -kaf "
251 (shell-quote-argument key-file
))))
252 (let ((coding-system-for-write 'raw-text-dos
))
253 (write-region start end key-file
))
254 (pgg-pgp-process-region start end nil pgg-pgp-program args
)
255 (let ((delete-by-moving-to-trash nil
))
256 (delete-file key-file
))
257 (pgg-process-when-success nil
)))
261 ;; arch-tag: 076b7801-37b2-49a6-97c3-218fdecde33c
262 ;;; pgg-pgp.el ends here