1 ;;; mml1991.el --- Old PGP message format (RFC 1991) support for MML
3 ;; Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006,
4 ;; 2007, 2008, 2009, 2010, 2011 Free Software Foundation, Inc.
6 ;; Author: Sascha Lüdecke <sascha@meta-x.de>,
7 ;; Simon Josefsson <simon@josefsson.org> (Mailcrypt interface, Gnus glue)
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/>.
30 ;; For Emacs <22.2 and XEmacs.
31 (unless (fboundp 'declare-function
) (defmacro declare-function
(&rest r
)))
33 (if (locate-library "password-cache")
34 (require 'password-cache
)
44 (defvar mc-pgp-always-sign
)
46 (autoload 'quoted-printable-decode-region
"qp")
47 (autoload 'quoted-printable-encode-region
"qp")
49 (autoload 'mm-decode-content-transfer-encoding
"mm-bodies")
50 (autoload 'mm-encode-content-transfer-encoding
"mm-bodies")
51 (autoload 'message-options-get
"message")
52 (autoload 'message-options-set
"message")
54 (defvar mml1991-use mml2015-use
55 "The package used for PGP.")
57 (defvar mml1991-function-alist
58 '((mailcrypt mml1991-mailcrypt-sign
59 mml1991-mailcrypt-encrypt
)
64 "Alist of PGP functions.")
66 (defvar mml1991-cache-passphrase mml-secure-cache-passphrase
67 "If t, cache passphrase.")
69 (defvar mml1991-passphrase-cache-expiry mml-secure-passphrase-cache-expiry
70 "How many seconds the passphrase is cached.
71 Whether the passphrase is cached at all is controlled by
72 `mml1991-cache-passphrase'.")
74 (defvar mml1991-signers nil
75 "A list of your own key ID which will be used to sign a message.")
77 (defvar mml1991-encrypt-to-self nil
78 "If t, add your own key ID to recipient list when encryption.")
82 (autoload 'mc-sign-generic
"mc-toplev")
84 (defvar mml1991-decrypt-function
'mailcrypt-decrypt
)
85 (defvar mml1991-verify-function
'mailcrypt-verify
)
87 (defun mml1991-mailcrypt-sign (cont)
88 (let ((text (current-buffer))
90 (result-buffer (get-buffer-create "*GPG Result*")))
91 ;; Save MIME Content[^ ]+: headers from signing
92 (goto-char (point-min))
93 (while (looking-at "^Content[^ ]+:") (forward-line))
95 (setq headers
(buffer-string))
96 (delete-region (point-min) (point)))
97 (goto-char (point-max))
100 (quoted-printable-decode-region (point-min) (point-max))
102 (setq signature
(current-buffer))
103 (insert-buffer-substring text
)
104 (unless (mc-sign-generic (message-options-get 'message-sender
)
106 (unless (> (point-max) (point-min))
107 (pop-to-buffer result-buffer
)
108 (error "Sign error")))
109 (goto-char (point-min))
110 (while (re-search-forward "\r+$" nil t
)
111 (replace-match "" t t
))
112 (quoted-printable-encode-region (point-min) (point-max))
114 (delete-region (point-min) (point-max))
115 (if headers
(insert headers
))
117 (insert-buffer-substring signature
)
118 (goto-char (point-max)))))
120 (declare-function mc-encrypt-generic
"ext:mc-toplev"
121 (&optional recipients scheme start end from sign
))
123 (defun mml1991-mailcrypt-encrypt (cont &optional sign
)
124 (let ((text (current-buffer))
126 (or mc-pgp-always-sign
128 (eq t
(or (message-options-get 'message-sign-encrypt
)
130 'message-sign-encrypt
131 (or (y-or-n-p "Sign the message? ")
135 (result-buffer (get-buffer-create "*GPG Result*")))
136 ;; Strip MIME Content[^ ]: headers since it will be ASCII ARMORED
137 (goto-char (point-min))
138 (while (looking-at "^Content[^ ]+:") (forward-line))
140 (delete-region (point-min) (point)))
141 (mm-with-unibyte-current-buffer
143 (inline (mm-disable-multibyte))
144 (setq cipher
(current-buffer))
145 (insert-buffer-substring text
)
146 (unless (mc-encrypt-generic
148 (message-options-get 'message-recipients
)
149 (message-options-set 'message-recipients
150 (read-string "Recipients: ")))
152 (point-min) (point-max)
153 (message-options-get 'message-sender
)
155 (unless (> (point-max) (point-min))
156 (pop-to-buffer result-buffer
)
157 (error "Encrypt error")))
158 (goto-char (point-min))
159 (while (re-search-forward "\r+$" nil t
)
160 (replace-match "" t t
))
162 (delete-region (point-min) (point-max))
163 ;;(insert "Content-Type: application/pgp-encrypted\n\n")
164 ;;(insert "Version: 1\n\n")
166 (insert-buffer-substring cipher
)
167 (goto-char (point-max))))))
171 (autoload 'pgg-sign-region
"pgg")
172 (autoload 'pgg-encrypt-region
"pgg")
174 (defvar pgg-default-user-id
)
175 (defvar pgg-errors-buffer
)
176 (defvar pgg-output-buffer
)
178 (defun mml1991-pgg-sign (cont)
179 (let ((pgg-text-mode t
)
180 (pgg-default-user-id (or (message-options-get 'mml-sender
)
181 pgg-default-user-id
))
183 ;; Don't sign headers.
184 (goto-char (point-min))
185 (when (re-search-forward "^$" nil t
)
186 (setq headers
(buffer-substring (point-min) (point)))
188 (narrow-to-region (point-min) (point))
189 (setq cte
(mail-fetch-field "content-transfer-encoding")))
191 (delete-region (point-min) (point))
193 (setq cte
(intern (downcase cte
)))
194 (mm-decode-content-transfer-encoding cte
)))
195 (unless (pgg-sign-region (point-min) (point-max) t
)
196 (pop-to-buffer pgg-errors-buffer
)
197 (error "Encrypt error"))
198 (delete-region (point-min) (point-max))
199 (mm-with-unibyte-current-buffer
200 (insert-buffer-substring pgg-output-buffer
)
201 (goto-char (point-min))
202 (while (re-search-forward "\r+$" nil t
)
203 (replace-match "" t t
))
205 (mm-encode-content-transfer-encoding cte
))
206 (goto-char (point-min))
212 (defun mml1991-pgg-encrypt (cont &optional sign
)
213 (goto-char (point-min))
214 (when (re-search-forward "^$" nil t
)
215 (let ((cte (save-restriction
216 (narrow-to-region (point-min) (point))
217 (mail-fetch-field "content-transfer-encoding"))))
218 ;; Strip MIME headers since it will be ASCII armored.
220 (delete-region (point-min) (point))
222 (mm-decode-content-transfer-encoding (intern (downcase cte
))))))
223 (unless (let ((pgg-text-mode t
))
225 (point-min) (point-max)
228 (message-options-get 'message-recipients
)
229 (message-options-set 'message-recipients
230 (read-string "Recipients: ")))
233 (pop-to-buffer pgg-errors-buffer
)
234 (error "Encrypt error"))
235 (delete-region (point-min) (point-max))
237 (insert-buffer-substring pgg-output-buffer
)
242 (defvar epg-user-id-alist
)
244 (autoload 'epg-make-context
"epg")
245 (autoload 'epg-passphrase-callback-function
"epg")
246 (autoload 'epa-select-keys
"epa")
247 (autoload 'epg-list-keys
"epg")
248 (autoload 'epg-context-set-armor
"epg")
249 (autoload 'epg-context-set-textmode
"epg")
250 (autoload 'epg-context-set-signers
"epg")
251 (autoload 'epg-context-set-passphrase-callback
"epg")
252 (autoload 'epg-sign-string
"epg")
253 (autoload 'epg-encrypt-string
"epg")
254 (autoload 'epg-configuration
"epg-config")
255 (autoload 'epg-expand-group
"epg-config")
257 (defvar mml1991-epg-secret-key-id-list nil
)
259 (defun mml1991-epg-passphrase-callback (context key-id ignore
)
261 (epg-passphrase-callback-function context key-id nil
)
262 (let* ((entry (assoc key-id epg-user-id-alist
))
265 (format "GnuPG passphrase for %s: "
273 (let ((password-cache-expiry mml1991-passphrase-cache-expiry
))
274 (password-cache-add key-id passphrase
))
275 (setq mml1991-epg-secret-key-id-list
276 (cons key-id mml1991-epg-secret-key-id-list
))
277 (copy-sequence passphrase
)))))
279 (defun mml1991-epg-sign (cont)
280 (let ((context (epg-make-context))
281 headers cte signers signature
)
282 (if (eq mm-sign-option
'guided
)
283 (setq signers
(epa-select-keys context
"Select keys for signing.
284 If no one is selected, default secret key is used. "
287 (setq signers
(mapcar (lambda (name)
288 (car (epg-list-keys context name t
)))
290 (epg-context-set-armor context t
)
291 (epg-context-set-textmode context t
)
292 (epg-context-set-signers context signers
)
293 (if mml1991-cache-passphrase
294 (epg-context-set-passphrase-callback
296 #'mml1991-epg-passphrase-callback
))
297 ;; Don't sign headers.
298 (goto-char (point-min))
299 (when (re-search-forward "^$" nil t
)
300 (setq headers
(buffer-substring (point-min) (point)))
302 (narrow-to-region (point-min) (point))
303 (setq cte
(mail-fetch-field "content-transfer-encoding")))
305 (delete-region (point-min) (point))
307 (setq cte
(intern (downcase cte
)))
308 (mm-decode-content-transfer-encoding cte
)))
309 (condition-case error
310 (setq signature
(epg-sign-string context
(buffer-string) 'clear
)
311 mml1991-epg-secret-key-id-list nil
)
313 (while mml1991-epg-secret-key-id-list
314 (password-cache-remove (car mml1991-epg-secret-key-id-list
))
315 (setq mml1991-epg-secret-key-id-list
316 (cdr mml1991-epg-secret-key-id-list
)))
317 (signal (car error
) (cdr error
))))
318 (delete-region (point-min) (point-max))
319 (mm-with-unibyte-current-buffer
321 (goto-char (point-min))
322 (while (re-search-forward "\r+$" nil t
)
323 (replace-match "" t t
))
325 (mm-encode-content-transfer-encoding cte
))
326 (goto-char (point-min))
332 (defun mml1991-epg-encrypt (cont &optional sign
)
333 (goto-char (point-min))
334 (when (re-search-forward "^$" nil t
)
335 (let ((cte (save-restriction
336 (narrow-to-region (point-min) (point))
337 (mail-fetch-field "content-transfer-encoding"))))
338 ;; Strip MIME headers since it will be ASCII armored.
340 (delete-region (point-min) (point))
342 (mm-decode-content-transfer-encoding (intern (downcase cte
))))))
343 (let ((context (epg-make-context))
345 (if (message-options-get 'message-recipients
)
347 (message-options-get 'message-recipients
)
349 cipher signers config
)
350 ;; We should remove this check if epg-0.0.6 is released.
351 (if (and (condition-case nil
352 (require 'epg-config
)
354 (functionp #'epg-expand-group
))
355 (setq config
(epg-configuration)
358 (mapcar (lambda (recipient)
359 (or (epg-expand-group config recipient
)
362 (if (eq mm-encrypt-option
'guided
)
364 (epa-select-keys context
"Select recipients for encryption.
365 If no one is selected, symmetric encryption will be performed. "
368 (delq nil
(mapcar (lambda (name)
369 (car (epg-list-keys context name
)))
371 (if mml1991-encrypt-to-self
375 (mapcar (lambda (name)
376 (car (epg-list-keys context name
)))
378 (error "mml1991-signers not set")))
380 (if (eq mm-sign-option
'guided
)
381 (setq signers
(epa-select-keys context
"Select keys for signing.
382 If no one is selected, default secret key is used. "
385 (setq signers
(mapcar (lambda (name)
386 (car (epg-list-keys context name t
)))
388 (epg-context-set-signers context signers
))
389 (epg-context-set-armor context t
)
390 (epg-context-set-textmode context t
)
391 (if mml1991-cache-passphrase
392 (epg-context-set-passphrase-callback
394 #'mml1991-epg-passphrase-callback
))
395 (condition-case error
397 (epg-encrypt-string context
(buffer-string) recipients sign
)
398 mml1991-epg-secret-key-id-list nil
)
400 (while mml1991-epg-secret-key-id-list
401 (password-cache-remove (car mml1991-epg-secret-key-id-list
))
402 (setq mml1991-epg-secret-key-id-list
403 (cdr mml1991-epg-secret-key-id-list
)))
404 (signal (car error
) (cdr error
))))
405 (delete-region (point-min) (point-max))
406 (insert "\n" cipher
))
410 (defun mml1991-encrypt (cont &optional sign
)
411 (let ((func (nth 2 (assq mml1991-use mml1991-function-alist
))))
413 (funcall func cont sign
)
414 (error "Cannot find encrypt function"))))
417 (defun mml1991-sign (cont)
418 (let ((func (nth 1 (assq mml1991-use mml1991-function-alist
))))
421 (error "Cannot find sign function"))))
426 ;; coding: iso-8859-1
429 ;;; mml1991.el ends here