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 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 2, 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 nil
57 "If non-nil, ask the user about the current operation more verbosely.")
59 (defvar mml1991-cache-passphrase t
60 "If t, cache passphrase.")
62 (defvar mml1991-passphrase-cache-expiry 16
63 "How many seconds the passphrase is cached.
64 Whether the passphrase is cached at all is controlled by
65 `mml1991-cache-passphrase'.")
70 (autoload 'mc-sign-generic "mc-toplev"))
72 (defvar mml1991-decrypt-function 'mailcrypt-decrypt)
73 (defvar mml1991-verify-function 'mailcrypt-verify)
75 (defun mml1991-mailcrypt-sign (cont)
76 (let ((text (current-buffer))
78 (result-buffer (get-buffer-create "*GPG Result*")))
79 ;; Save MIME Content[^ ]+: headers from signing
80 (goto-char (point-min))
81 (while (looking-at "^Content[^ ]+:") (forward-line))
83 (setq headers (buffer-string))
84 (delete-region (point-min) (point)))
85 (goto-char (point-max))
88 (quoted-printable-decode-region (point-min) (point-max))
90 (setq signature (current-buffer))
91 (insert-buffer-substring text)
92 (unless (mc-sign-generic (message-options-get 'message-sender)
94 (unless (> (point-max) (point-min))
95 (pop-to-buffer result-buffer)
96 (error "Sign error")))
97 (goto-char (point-min))
98 (while (re-search-forward "\r+$" nil t)
99 (replace-match "" t t))
100 (quoted-printable-encode-region (point-min) (point-max))
102 (delete-region (point-min) (point-max))
103 (if headers (insert headers))
105 (insert-buffer-substring signature)
106 (goto-char (point-max)))))
108 (defun mml1991-mailcrypt-encrypt (cont &optional sign)
109 (let ((text (current-buffer))
111 (or mc-pgp-always-sign
113 (eq t (or (message-options-get 'message-sign-encrypt)
115 'message-sign-encrypt
116 (or (y-or-n-p "Sign the message? ")
120 (result-buffer (get-buffer-create "*GPG Result*")))
121 ;; Strip MIME Content[^ ]: headers since it will be ASCII ARMOURED
122 (goto-char (point-min))
123 (while (looking-at "^Content[^ ]+:") (forward-line))
125 (delete-region (point-min) (point)))
126 (mm-with-unibyte-current-buffer
128 (setq cipher (current-buffer))
129 (insert-buffer-substring text)
130 (unless (mc-encrypt-generic
132 (message-options-get 'message-recipients)
133 (message-options-set 'message-recipients
134 (read-string "Recipients: ")))
136 (point-min) (point-max)
137 (message-options-get 'message-sender)
139 (unless (> (point-max) (point-min))
140 (pop-to-buffer result-buffer)
141 (error "Encrypt error")))
142 (goto-char (point-min))
143 (while (re-search-forward "\r+$" nil t)
144 (replace-match "" t t))
146 (delete-region (point-min) (point-max))
147 ;;(insert "Content-Type: application/pgp-encrypted\n\n")
148 ;;(insert "Version: 1\n\n")
150 (insert-buffer-substring cipher)
151 (goto-char (point-max))))))
156 (autoload 'gpg-sign-cleartext "gpg"))
158 (defun mml1991-gpg-sign (cont)
159 (let ((text (current-buffer))
161 (result-buffer (get-buffer-create "*GPG Result*")))
162 ;; Save MIME Content[^ ]+: headers from signing
163 (goto-char (point-min))
164 (while (looking-at "^Content[^ ]+:") (forward-line))
166 (setq headers (buffer-string))
167 (delete-region (point-min) (point)))
168 (goto-char (point-max))
171 (quoted-printable-decode-region (point-min) (point-max))
173 (unless (gpg-sign-cleartext text (setq signature (current-buffer))
176 (message-options-get 'message-sender))
177 (unless (> (point-max) (point-min))
178 (pop-to-buffer result-buffer)
179 (error "Sign error")))
180 (goto-char (point-min))
181 (while (re-search-forward "\r+$" nil t)
182 (replace-match "" t t))
183 (quoted-printable-encode-region (point-min) (point-max))
185 (delete-region (point-min) (point-max))
186 (if headers (insert headers))
188 (insert-buffer-substring signature)
189 (goto-char (point-max)))))
191 (defun mml1991-gpg-encrypt (cont &optional sign)
192 (let ((text (current-buffer))
194 (result-buffer (get-buffer-create "*GPG Result*")))
195 ;; Strip MIME Content[^ ]: headers since it will be ASCII ARMOURED
196 (goto-char (point-min))
197 (while (looking-at "^Content[^ ]+:") (forward-line))
199 (delete-region (point-min) (point)))
200 (mm-with-unibyte-current-buffer
202 (flet ((gpg-encrypt-func
203 (sign plaintext ciphertext result recipients &optional
204 passphrase sign-with-key armor textmode)
207 plaintext ciphertext result recipients passphrase
208 sign-with-key armor textmode)
210 plaintext ciphertext result recipients passphrase
212 (unless (gpg-encrypt-func
214 text (setq cipher (current-buffer))
218 (message-options-get 'message-recipients)
219 (message-options-set 'message-recipients
220 (read-string "Recipients: ")))
223 (message-options-get 'message-sender)
224 t t) ; armor & textmode
225 (unless (> (point-max) (point-min))
226 (pop-to-buffer result-buffer)
227 (error "Encrypt error"))))
228 (goto-char (point-min))
229 (while (re-search-forward "\r+$" nil t)
230 (replace-match "" t t))
232 (delete-region (point-min) (point-max))
233 ;;(insert "Content-Type: application/pgp-encrypted\n\n")
234 ;;(insert "Version: 1\n\n")
236 (insert-buffer-substring cipher)
237 (goto-char (point-max))))))
242 (defvar pgg-default-user-id)
243 (defvar pgg-errors-buffer)
244 (defvar pgg-output-buffer))
246 (defun mml1991-pgg-sign (cont)
247 (let ((pgg-text-mode t)
248 (pgg-default-user-id (or (message-options-get 'mml-sender)
249 pgg-default-user-id))
251 ;; Don't sign headers.
252 (goto-char (point-min))
253 (when (re-search-forward "^$" nil t)
254 (setq headers (buffer-substring (point-min) (point)))
256 (narrow-to-region (point-min) (point))
257 (setq cte (mail-fetch-field "content-transfer-encoding")))
259 (delete-region (point-min) (point))
261 (setq cte (intern (downcase cte)))
262 (mm-decode-content-transfer-encoding cte)))
263 (unless (pgg-sign-region (point-min) (point-max) t)
264 (pop-to-buffer pgg-errors-buffer)
265 (error "Encrypt error"))
266 (delete-region (point-min) (point-max))
267 (mm-with-unibyte-current-buffer
268 (insert-buffer-substring pgg-output-buffer)
269 (goto-char (point-min))
270 (while (re-search-forward "\r+$" nil t)
271 (replace-match "" t t))
273 (mm-encode-content-transfer-encoding cte))
274 (goto-char (point-min))
280 (defun mml1991-pgg-encrypt (cont &optional sign)
281 (goto-char (point-min))
282 (when (re-search-forward "^$" nil t)
283 (let ((cte (save-restriction
284 (narrow-to-region (point-min) (point))
285 (mail-fetch-field "content-transfer-encoding"))))
286 ;; Strip MIME headers since it will be ASCII armoured.
288 (delete-region (point-min) (point))
290 (mm-decode-content-transfer-encoding (intern (downcase cte))))))
291 (unless (let ((pgg-text-mode t))
293 (point-min) (point-max)
296 (message-options-get 'message-recipients)
297 (message-options-set 'message-recipients
298 (read-string "Recipients: ")))
301 (pop-to-buffer pgg-errors-buffer)
302 (error "Encrypt error"))
303 (delete-region (point-min) (point-max))
305 (insert-buffer-substring pgg-output-buffer)
311 (autoload 'epg-make-context "epg"))
314 (defvar epg-user-id-alist)
315 (autoload 'epg-passphrase-callback-function "epg")
316 (autoload 'epa-select-keys "epa")
317 (autoload 'epg-list-keys "epg")
319 (autoload 'epg-context-set-armor "epg")
320 (autoload 'epg-context-set-textmode "epg")
322 (autoload 'epg-context-set-signers "epg")
323 (autoload 'epg-context-set-passphrase-callback "epg")
325 (autoload 'epg-sign-string "epg")
326 (autoload 'epg-encrypt-string "epg"))
328 (defvar mml1991-epg-secret-key-id-list nil)
330 (defun mml1991-epg-passphrase-callback (context key-id ignore)
332 (epg-passphrase-callback-function context key-id nil)
333 (let* ((entry (assoc key-id epg-user-id-alist))
336 (format "GnuPG passphrase for %s: "
344 (let ((password-cache-expiry mml1991-passphrase-cache-expiry))
345 (password-cache-add key-id passphrase))
346 (setq mml1991-epg-secret-key-id-list
347 (cons key-id mml1991-epg-secret-key-id-list))
348 (copy-sequence passphrase)))))
350 (defun mml1991-epg-sign (cont)
351 (let ((context (epg-make-context))
352 headers cte signers signature)
354 (setq signers (epa-select-keys context "Select keys for signing.
355 If no one is selected, default secret key is used. "
357 (setq signers (list (car (epg-list-keys
359 (message-options-get 'mml-sender) t)))))
360 (epg-context-set-armor context t)
361 (epg-context-set-textmode context t)
362 (epg-context-set-signers context signers)
363 (if mml1991-cache-passphrase
364 (epg-context-set-passphrase-callback
366 #'mml1991-epg-passphrase-callback))
367 ;; Don't sign headers.
368 (goto-char (point-min))
369 (when (re-search-forward "^$" nil t)
370 (setq headers (buffer-substring (point-min) (point)))
372 (narrow-to-region (point-min) (point))
373 (setq cte (mail-fetch-field "content-transfer-encoding")))
375 (delete-region (point-min) (point))
377 (setq cte (intern (downcase cte)))
378 (mm-decode-content-transfer-encoding cte)))
379 (condition-case error
380 (setq signature (epg-sign-string context (buffer-string) 'clear)
381 mml1991-epg-secret-key-id-list nil)
383 (while mml1991-epg-secret-key-id-list
384 (password-cache-remove (car mml1991-epg-secret-key-id-list))
385 (setq mml1991-epg-secret-key-id-list
386 (cdr mml1991-epg-secret-key-id-list)))
387 (signal (car error) (cdr error))))
388 (delete-region (point-min) (point-max))
389 (mm-with-unibyte-current-buffer
391 (goto-char (point-min))
392 (while (re-search-forward "\r+$" nil t)
393 (replace-match "" t t))
395 (mm-encode-content-transfer-encoding cte))
396 (goto-char (point-min))
402 (defun mml1991-epg-encrypt (cont &optional sign)
403 (goto-char (point-min))
404 (when (re-search-forward "^$" nil t)
405 (let ((cte (save-restriction
406 (narrow-to-region (point-min) (point))
407 (mail-fetch-field "content-transfer-encoding"))))
408 ;; Strip MIME headers since it will be ASCII armoured.
410 (delete-region (point-min) (point))
412 (mm-decode-content-transfer-encoding (intern (downcase cte))))))
413 (let ((context (epg-make-context))
415 (if (or mml1991-verbose
416 (null (message-options-get 'message-recipients)))
418 (epa-select-keys context "Select recipients for encryption.
419 If no one is selected, symmetric encryption will be performed. "
420 (if (message-options-get 'message-recipients)
422 (message-options-get 'message-recipients)
423 "[ \f\t\n\r\v,]+"))))
425 (mapcar (lambda (name)
426 (car (epg-list-keys context name)))
428 (message-options-get 'message-recipients)
429 "[ \f\t\n\r\v,]+"))))
430 (epg-context-set-armor context t)
431 (epg-context-set-textmode context t)
432 (if mml1991-cache-passphrase
433 (epg-context-set-passphrase-callback
435 #'mml1991-epg-passphrase-callback))
436 (condition-case error
438 (epg-encrypt-string context (buffer-string) recipients sign)
439 mml1991-epg-secret-key-id-list nil)
441 (while mml1991-epg-secret-key-id-list
442 (password-cache-remove (car mml1991-epg-secret-key-id-list))
443 (setq mml1991-epg-secret-key-id-list
444 (cdr mml1991-epg-secret-key-id-list)))
445 (signal (car error) (cdr error))))
446 (delete-region (point-min) (point-max))
447 (insert "\n" cipher))
451 (defun mml1991-encrypt (cont &optional sign)
452 (let ((func (nth 2 (assq mml1991-use mml1991-function-alist))))
454 (funcall func cont sign)
455 (error "Cannot find encrypt function"))))
458 (defun mml1991-sign (cont)
459 (let ((func (nth 1 (assq mml1991-use mml1991-function-alist))))
462 (error "Cannot find sign function"))))
467 ;; coding: iso-8859-1
470 ;;; arch-tag: e542be18-ab28-4393-9b33-97fe9cf30706
471 ;;; mml1991.el ends here