1 ;;; mml1991.el --- Old PGP message format (RFC 1991) support for MML
3 ;; Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003, 2004,
4 ;; 2005, 2006, 2007 Free Software Foundation, Inc.
6 ;; Author: Sascha Ldecke <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, or (at your option)
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.
37 (defvar mc-pgp-always-sign)
39 (autoload 'quoted-printable-decode-region "qp")
40 (autoload 'quoted-printable-encode-region "qp")
42 (defvar mml1991-use mml2015-use
43 "The package used for PGP.")
45 (defvar mml1991-function-alist
46 '((mailcrypt mml1991-mailcrypt-sign
47 mml1991-mailcrypt-encrypt)
54 "Alist of PGP functions.")
56 (defvar mml1991-verbose mml-secure-verbose
57 "If non-nil, ask the user about the current operation more verbosely.")
59 (defvar mml1991-cache-passphrase mml-secure-cache-passphrase
60 "If t, cache passphrase.")
62 (defvar mml1991-passphrase-cache-expiry mml-secure-passphrase-cache-expiry
63 "How many seconds the passphrase is cached.
64 Whether the passphrase is cached at all is controlled by
65 `mml1991-cache-passphrase'.")
67 (defvar mml1991-signers nil
68 "A list of your own key ID which will be used to sign a message.")
70 (defvar mml1991-encrypt-to-self nil
71 "If t, add your own key ID to recipient list when encryption.")
76 (autoload 'mc-sign-generic "mc-toplev"))
78 (defvar mml1991-decrypt-function 'mailcrypt-decrypt)
79 (defvar mml1991-verify-function 'mailcrypt-verify)
81 (defun mml1991-mailcrypt-sign (cont)
82 (let ((text (current-buffer))
84 (result-buffer (get-buffer-create "*GPG Result*")))
85 ;; Save MIME Content[^ ]+: headers from signing
86 (goto-char (point-min))
87 (while (looking-at "^Content[^ ]+:") (forward-line))
89 (setq headers (buffer-string))
90 (delete-region (point-min) (point)))
91 (goto-char (point-max))
94 (quoted-printable-decode-region (point-min) (point-max))
96 (setq signature (current-buffer))
97 (insert-buffer-substring text)
98 (unless (mc-sign-generic (message-options-get 'message-sender)
100 (unless (> (point-max) (point-min))
101 (pop-to-buffer result-buffer)
102 (error "Sign error")))
103 (goto-char (point-min))
104 (while (re-search-forward "\r+$" nil t)
105 (replace-match "" t t))
106 (quoted-printable-encode-region (point-min) (point-max))
108 (delete-region (point-min) (point-max))
109 (if headers (insert headers))
111 (insert-buffer-substring signature)
112 (goto-char (point-max)))))
114 (defun mml1991-mailcrypt-encrypt (cont &optional sign)
115 (let ((text (current-buffer))
117 (or mc-pgp-always-sign
119 (eq t (or (message-options-get 'message-sign-encrypt)
121 'message-sign-encrypt
122 (or (y-or-n-p "Sign the message? ")
126 (result-buffer (get-buffer-create "*GPG Result*")))
127 ;; Strip MIME Content[^ ]: headers since it will be ASCII ARMOURED
128 (goto-char (point-min))
129 (while (looking-at "^Content[^ ]+:") (forward-line))
131 (delete-region (point-min) (point)))
132 (mm-with-unibyte-current-buffer
134 (setq cipher (current-buffer))
135 (insert-buffer-substring text)
136 (unless (mc-encrypt-generic
138 (message-options-get 'message-recipients)
139 (message-options-set 'message-recipients
140 (read-string "Recipients: ")))
142 (point-min) (point-max)
143 (message-options-get 'message-sender)
145 (unless (> (point-max) (point-min))
146 (pop-to-buffer result-buffer)
147 (error "Encrypt error")))
148 (goto-char (point-min))
149 (while (re-search-forward "\r+$" nil t)
150 (replace-match "" t t))
152 (delete-region (point-min) (point-max))
153 ;;(insert "Content-Type: application/pgp-encrypted\n\n")
154 ;;(insert "Version: 1\n\n")
156 (insert-buffer-substring cipher)
157 (goto-char (point-max))))))
162 (autoload 'gpg-sign-cleartext "gpg"))
164 (defun mml1991-gpg-sign (cont)
165 (let ((text (current-buffer))
167 (result-buffer (get-buffer-create "*GPG Result*")))
168 ;; Save MIME Content[^ ]+: headers from signing
169 (goto-char (point-min))
170 (while (looking-at "^Content[^ ]+:") (forward-line))
172 (setq headers (buffer-string))
173 (delete-region (point-min) (point)))
174 (goto-char (point-max))
177 (quoted-printable-decode-region (point-min) (point-max))
179 (unless (gpg-sign-cleartext text (setq signature (current-buffer))
182 (message-options-get 'message-sender))
183 (unless (> (point-max) (point-min))
184 (pop-to-buffer result-buffer)
185 (error "Sign error")))
186 (goto-char (point-min))
187 (while (re-search-forward "\r+$" nil t)
188 (replace-match "" t t))
189 (quoted-printable-encode-region (point-min) (point-max))
191 (delete-region (point-min) (point-max))
192 (if headers (insert headers))
194 (insert-buffer-substring signature)
195 (goto-char (point-max)))))
197 (defun mml1991-gpg-encrypt (cont &optional sign)
198 (let ((text (current-buffer))
200 (result-buffer (get-buffer-create "*GPG Result*")))
201 ;; Strip MIME Content[^ ]: headers since it will be ASCII ARMOURED
202 (goto-char (point-min))
203 (while (looking-at "^Content[^ ]+:") (forward-line))
205 (delete-region (point-min) (point)))
206 (mm-with-unibyte-current-buffer
208 (flet ((gpg-encrypt-func
209 (sign plaintext ciphertext result recipients &optional
210 passphrase sign-with-key armor textmode)
213 plaintext ciphertext result recipients passphrase
214 sign-with-key armor textmode)
216 plaintext ciphertext result recipients passphrase
218 (unless (gpg-encrypt-func
220 text (setq cipher (current-buffer))
224 (message-options-get 'message-recipients)
225 (message-options-set 'message-recipients
226 (read-string "Recipients: ")))
229 (message-options-get 'message-sender)
230 t t) ; armor & textmode
231 (unless (> (point-max) (point-min))
232 (pop-to-buffer result-buffer)
233 (error "Encrypt error"))))
234 (goto-char (point-min))
235 (while (re-search-forward "\r+$" nil t)
236 (replace-match "" t t))
238 (delete-region (point-min) (point-max))
239 ;;(insert "Content-Type: application/pgp-encrypted\n\n")
240 ;;(insert "Version: 1\n\n")
242 (insert-buffer-substring cipher)
243 (goto-char (point-max))))))
247 (defvar pgg-default-user-id)
248 (defvar pgg-errors-buffer)
249 (defvar pgg-output-buffer)
251 (defun mml1991-pgg-sign (cont)
252 (let ((pgg-text-mode t)
253 (pgg-default-user-id (or (message-options-get 'mml-sender)
254 pgg-default-user-id))
256 ;; Don't sign headers.
257 (goto-char (point-min))
258 (when (re-search-forward "^$" nil t)
259 (setq headers (buffer-substring (point-min) (point)))
261 (narrow-to-region (point-min) (point))
262 (setq cte (mail-fetch-field "content-transfer-encoding")))
264 (delete-region (point-min) (point))
266 (setq cte (intern (downcase cte)))
267 (mm-decode-content-transfer-encoding cte)))
268 (unless (pgg-sign-region (point-min) (point-max) t)
269 (pop-to-buffer pgg-errors-buffer)
270 (error "Encrypt error"))
271 (delete-region (point-min) (point-max))
272 (mm-with-unibyte-current-buffer
273 (insert-buffer-substring pgg-output-buffer)
274 (goto-char (point-min))
275 (while (re-search-forward "\r+$" nil t)
276 (replace-match "" t t))
278 (mm-encode-content-transfer-encoding cte))
279 (goto-char (point-min))
285 (defun mml1991-pgg-encrypt (cont &optional sign)
286 (goto-char (point-min))
287 (when (re-search-forward "^$" nil t)
288 (let ((cte (save-restriction
289 (narrow-to-region (point-min) (point))
290 (mail-fetch-field "content-transfer-encoding"))))
291 ;; Strip MIME headers since it will be ASCII armoured.
293 (delete-region (point-min) (point))
295 (mm-decode-content-transfer-encoding (intern (downcase cte))))))
296 (unless (let ((pgg-text-mode t))
298 (point-min) (point-max)
301 (message-options-get 'message-recipients)
302 (message-options-set 'message-recipients
303 (read-string "Recipients: ")))
306 (pop-to-buffer pgg-errors-buffer)
307 (error "Encrypt error"))
308 (delete-region (point-min) (point-max))
310 (insert-buffer-substring pgg-output-buffer)
315 (defvar epg-user-id-alist)
316 (defvar password-cache-expiry)
319 (autoload 'epg-make-context "epg")
320 (autoload 'epg-passphrase-callback-function "epg")
321 (autoload 'epa-select-keys "epa")
322 (autoload 'epg-list-keys "epg")
323 (autoload 'epg-context-set-armor "epg")
324 (autoload 'epg-context-set-textmode "epg")
325 (autoload 'epg-context-set-signers "epg")
326 (autoload 'epg-context-set-passphrase-callback "epg")
327 (autoload 'epg-sign-string "epg")
328 (autoload 'epg-encrypt-string "epg")
329 (autoload 'epg-configuration "epg-config")
330 (autoload 'epg-expand-group "epg-config"))
332 (defvar mml1991-epg-secret-key-id-list nil)
334 (defun mml1991-epg-passphrase-callback (context key-id ignore)
336 (epg-passphrase-callback-function context key-id nil)
337 (let* ((entry (assoc key-id epg-user-id-alist))
340 (format "GnuPG passphrase for %s: "
348 (let ((password-cache-expiry mml1991-passphrase-cache-expiry))
349 (password-cache-add key-id passphrase))
350 (setq mml1991-epg-secret-key-id-list
351 (cons key-id mml1991-epg-secret-key-id-list))
352 (copy-sequence passphrase)))))
354 (defun mml1991-epg-sign (cont)
355 (let ((context (epg-make-context))
356 headers cte signers signature)
358 (setq signers (epa-select-keys context "Select keys for signing.
359 If no one is selected, default secret key is used. "
362 (setq signers (mapcar (lambda (name)
363 (car (epg-list-keys context name t)))
365 (epg-context-set-armor context t)
366 (epg-context-set-textmode context t)
367 (epg-context-set-signers context signers)
368 (if mml1991-cache-passphrase
369 (epg-context-set-passphrase-callback
371 #'mml1991-epg-passphrase-callback))
372 ;; Don't sign headers.
373 (goto-char (point-min))
374 (when (re-search-forward "^$" nil t)
375 (setq headers (buffer-substring (point-min) (point)))
377 (narrow-to-region (point-min) (point))
378 (setq cte (mail-fetch-field "content-transfer-encoding")))
380 (delete-region (point-min) (point))
382 (setq cte (intern (downcase cte)))
383 (mm-decode-content-transfer-encoding cte)))
384 (condition-case error
385 (setq signature (epg-sign-string context (buffer-string) 'clear)
386 mml1991-epg-secret-key-id-list nil)
388 (while mml1991-epg-secret-key-id-list
389 (password-cache-remove (car mml1991-epg-secret-key-id-list))
390 (setq mml1991-epg-secret-key-id-list
391 (cdr mml1991-epg-secret-key-id-list)))
392 (signal (car error) (cdr error))))
393 (delete-region (point-min) (point-max))
394 (mm-with-unibyte-current-buffer
396 (goto-char (point-min))
397 (while (re-search-forward "\r+$" nil t)
398 (replace-match "" t t))
400 (mm-encode-content-transfer-encoding cte))
401 (goto-char (point-min))
407 (defun mml1991-epg-encrypt (cont &optional sign)
408 (goto-char (point-min))
409 (when (re-search-forward "^$" nil t)
410 (let ((cte (save-restriction
411 (narrow-to-region (point-min) (point))
412 (mail-fetch-field "content-transfer-encoding"))))
413 ;; Strip MIME headers since it will be ASCII armoured.
415 (delete-region (point-min) (point))
417 (mm-decode-content-transfer-encoding (intern (downcase cte))))))
418 (let ((context (epg-make-context))
420 (if (message-options-get 'message-recipients)
422 (message-options-get 'message-recipients)
424 cipher signers config)
425 ;; We should remove this check if epg-0.0.6 is released.
426 (if (and (condition-case nil
427 (require 'epg-config)
429 (functionp #'epg-expand-group))
430 (setq config (epg-configuration)
433 (mapcar (lambda (recipient)
434 (or (epg-expand-group config recipient)
439 (epa-select-keys context "Select recipients for encryption.
440 If no one is selected, symmetric encryption will be performed. "
443 (delq nil (mapcar (lambda (name)
444 (car (epg-list-keys context name)))
446 (if mml1991-encrypt-to-self
450 (mapcar (lambda (name)
451 (car (epg-list-keys context name)))
453 (error "mml1991-signers not set")))
456 (setq signers (epa-select-keys context "Select keys for signing.
457 If no one is selected, default secret key is used. "
460 (setq signers (mapcar (lambda (name)
461 (car (epg-list-keys context name t)))
463 (epg-context-set-signers context signers))
464 (epg-context-set-armor context t)
465 (epg-context-set-textmode context t)
466 (if mml1991-cache-passphrase
467 (epg-context-set-passphrase-callback
469 #'mml1991-epg-passphrase-callback))
470 (condition-case error
472 (epg-encrypt-string context (buffer-string) recipients sign)
473 mml1991-epg-secret-key-id-list nil)
475 (while mml1991-epg-secret-key-id-list
476 (password-cache-remove (car mml1991-epg-secret-key-id-list))
477 (setq mml1991-epg-secret-key-id-list
478 (cdr mml1991-epg-secret-key-id-list)))
479 (signal (car error) (cdr error))))
480 (delete-region (point-min) (point-max))
481 (insert "\n" cipher))
485 (defun mml1991-encrypt (cont &optional sign)
486 (let ((func (nth 2 (assq mml1991-use mml1991-function-alist))))
488 (funcall func cont sign)
489 (error "Cannot find encrypt function"))))
492 (defun mml1991-sign (cont)
493 (let ((func (nth 1 (assq mml1991-use mml1991-function-alist))))
496 (error "Cannot find sign function"))))
501 ;; coding: iso-8859-1
504 ;;; arch-tag: e542be18-ab28-4393-9b33-97fe9cf30706
505 ;;; mml1991.el ends here