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.
35 (defvar mc-pgp-always-sign)
37 (autoload 'quoted-printable-decode-region "qp")
38 (autoload 'quoted-printable-encode-region "qp")
40 (defvar mml1991-use mml2015-use
41 "The package used for PGP.")
43 (defvar mml1991-function-alist
44 '((mailcrypt mml1991-mailcrypt-sign
45 mml1991-mailcrypt-encrypt)
52 "Alist of PGP functions.")
54 (defvar mml1991-verbose nil
55 "If non-nil, ask the user about the current operation more verbosely.")
57 (defvar mml1991-cache-passphrase t
58 "If t, cache passphrase.")
60 (defvar mml1991-passphrase-cache-expiry 16
61 "How many seconds the passphrase is cached.
62 Whether the passphrase is cached at all is controlled by
63 `mml1991-cache-passphrase'.")
68 (autoload 'mc-sign-generic "mc-toplev"))
70 (defvar mml1991-decrypt-function 'mailcrypt-decrypt)
71 (defvar mml1991-verify-function 'mailcrypt-verify)
73 (defun mml1991-mailcrypt-sign (cont)
74 (let ((text (current-buffer))
76 (result-buffer (get-buffer-create "*GPG Result*")))
77 ;; Save MIME Content[^ ]+: headers from signing
78 (goto-char (point-min))
79 (while (looking-at "^Content[^ ]+:") (forward-line))
81 (setq headers (buffer-string))
82 (delete-region (point-min) (point)))
83 (goto-char (point-max))
86 (quoted-printable-decode-region (point-min) (point-max))
88 (setq signature (current-buffer))
89 (insert-buffer-substring text)
90 (unless (mc-sign-generic (message-options-get 'message-sender)
92 (unless (> (point-max) (point-min))
93 (pop-to-buffer result-buffer)
94 (error "Sign error")))
95 (goto-char (point-min))
96 (while (re-search-forward "\r+$" nil t)
97 (replace-match "" t t))
98 (quoted-printable-encode-region (point-min) (point-max))
100 (delete-region (point-min) (point-max))
101 (if headers (insert headers))
103 (insert-buffer-substring signature)
104 (goto-char (point-max)))))
106 (defun mml1991-mailcrypt-encrypt (cont &optional sign)
107 (let ((text (current-buffer))
109 (or mc-pgp-always-sign
111 (eq t (or (message-options-get 'message-sign-encrypt)
113 'message-sign-encrypt
114 (or (y-or-n-p "Sign the message? ")
118 (result-buffer (get-buffer-create "*GPG Result*")))
119 ;; Strip MIME Content[^ ]: headers since it will be ASCII ARMOURED
120 (goto-char (point-min))
121 (while (looking-at "^Content[^ ]+:") (forward-line))
123 (delete-region (point-min) (point)))
124 (mm-with-unibyte-current-buffer
126 (setq cipher (current-buffer))
127 (insert-buffer-substring text)
128 (unless (mc-encrypt-generic
130 (message-options-get 'message-recipients)
131 (message-options-set 'message-recipients
132 (read-string "Recipients: ")))
134 (point-min) (point-max)
135 (message-options-get 'message-sender)
137 (unless (> (point-max) (point-min))
138 (pop-to-buffer result-buffer)
139 (error "Encrypt error")))
140 (goto-char (point-min))
141 (while (re-search-forward "\r+$" nil t)
142 (replace-match "" t t))
144 (delete-region (point-min) (point-max))
145 ;;(insert "Content-Type: application/pgp-encrypted\n\n")
146 ;;(insert "Version: 1\n\n")
148 (insert-buffer-substring cipher)
149 (goto-char (point-max))))))
154 (autoload 'gpg-sign-cleartext "gpg"))
156 (defun mml1991-gpg-sign (cont)
157 (let ((text (current-buffer))
159 (result-buffer (get-buffer-create "*GPG Result*")))
160 ;; Save MIME Content[^ ]+: headers from signing
161 (goto-char (point-min))
162 (while (looking-at "^Content[^ ]+:") (forward-line))
164 (setq headers (buffer-string))
165 (delete-region (point-min) (point)))
166 (goto-char (point-max))
169 (quoted-printable-decode-region (point-min) (point-max))
171 (unless (gpg-sign-cleartext text (setq signature (current-buffer))
174 (message-options-get 'message-sender))
175 (unless (> (point-max) (point-min))
176 (pop-to-buffer result-buffer)
177 (error "Sign error")))
178 (goto-char (point-min))
179 (while (re-search-forward "\r+$" nil t)
180 (replace-match "" t t))
181 (quoted-printable-encode-region (point-min) (point-max))
183 (delete-region (point-min) (point-max))
184 (if headers (insert headers))
186 (insert-buffer-substring signature)
187 (goto-char (point-max)))))
189 (defun mml1991-gpg-encrypt (cont &optional sign)
190 (let ((text (current-buffer))
192 (result-buffer (get-buffer-create "*GPG Result*")))
193 ;; Strip MIME Content[^ ]: headers since it will be ASCII ARMOURED
194 (goto-char (point-min))
195 (while (looking-at "^Content[^ ]+:") (forward-line))
197 (delete-region (point-min) (point)))
198 (mm-with-unibyte-current-buffer
200 (flet ((gpg-encrypt-func
201 (sign plaintext ciphertext result recipients &optional
202 passphrase sign-with-key armor textmode)
205 plaintext ciphertext result recipients passphrase
206 sign-with-key armor textmode)
208 plaintext ciphertext result recipients passphrase
210 (unless (gpg-encrypt-func
212 text (setq cipher (current-buffer))
216 (message-options-get 'message-recipients)
217 (message-options-set 'message-recipients
218 (read-string "Recipients: ")))
221 (message-options-get 'message-sender)
222 t t) ; armor & textmode
223 (unless (> (point-max) (point-min))
224 (pop-to-buffer result-buffer)
225 (error "Encrypt error"))))
226 (goto-char (point-min))
227 (while (re-search-forward "\r+$" nil t)
228 (replace-match "" t t))
230 (delete-region (point-min) (point-max))
231 ;;(insert "Content-Type: application/pgp-encrypted\n\n")
232 ;;(insert "Version: 1\n\n")
234 (insert-buffer-substring cipher)
235 (goto-char (point-max))))))
240 (defvar pgg-default-user-id)
241 (defvar pgg-errors-buffer)
242 (defvar pgg-output-buffer))
244 (defun mml1991-pgg-sign (cont)
245 (let ((pgg-text-mode t)
246 (pgg-default-user-id (or (message-options-get 'mml-sender)
247 pgg-default-user-id))
249 ;; Don't sign headers.
250 (goto-char (point-min))
251 (when (re-search-forward "^$" nil t)
252 (setq headers (buffer-substring (point-min) (point)))
254 (narrow-to-region (point-min) (point))
255 (setq cte (mail-fetch-field "content-transfer-encoding")))
257 (delete-region (point-min) (point))
259 (setq cte (intern (downcase cte)))
260 (mm-decode-content-transfer-encoding cte)))
261 (unless (pgg-sign-region (point-min) (point-max) t)
262 (pop-to-buffer pgg-errors-buffer)
263 (error "Encrypt error"))
264 (delete-region (point-min) (point-max))
265 (mm-with-unibyte-current-buffer
266 (insert-buffer-substring pgg-output-buffer)
267 (goto-char (point-min))
268 (while (re-search-forward "\r+$" nil t)
269 (replace-match "" t t))
271 (mm-encode-content-transfer-encoding cte))
272 (goto-char (point-min))
278 (defun mml1991-pgg-encrypt (cont &optional sign)
279 (goto-char (point-min))
280 (when (re-search-forward "^$" nil t)
281 (let ((cte (save-restriction
282 (narrow-to-region (point-min) (point))
283 (mail-fetch-field "content-transfer-encoding"))))
284 ;; Strip MIME headers since it will be ASCII armoured.
286 (delete-region (point-min) (point))
288 (mm-decode-content-transfer-encoding (intern (downcase cte))))))
289 (unless (let ((pgg-text-mode t))
291 (point-min) (point-max)
294 (message-options-get 'message-recipients)
295 (message-options-set 'message-recipients
296 (read-string "Recipients: ")))
299 (pop-to-buffer pgg-errors-buffer)
300 (error "Encrypt error"))
301 (delete-region (point-min) (point-max))
303 (insert-buffer-substring pgg-output-buffer)
309 (autoload 'epg-make-context "epg"))
312 (defvar epg-user-id-alist)
313 (autoload 'epg-passphrase-callback-function "epg")
314 (autoload 'epa-select-keys "epa")
315 (autoload 'epg-list-keys "epg")
317 (autoload 'epg-context-set-armor "epg")
318 (autoload 'epg-context-set-textmode "epg")
320 (autoload 'epg-context-set-signers "epg")
321 (autoload 'epg-context-set-passphrase-callback "epg")
323 (autoload 'epg-sign-string "epg")
324 (autoload 'epg-encrypt-string "epg"))
326 (defvar mml1991-epg-secret-key-id-list nil)
328 (defun mml1991-epg-passphrase-callback (context key-id ignore)
330 (epg-passphrase-callback-function context key-id nil)
331 (let* ((entry (assoc key-id epg-user-id-alist))
334 (format "GnuPG passphrase for %s: "
342 (let ((password-cache-expiry mml1991-passphrase-cache-expiry))
343 (password-cache-add key-id passphrase))
344 (setq mml1991-epg-secret-key-id-list
345 (cons key-id mml1991-epg-secret-key-id-list))
346 (copy-sequence passphrase)))))
348 (defun mml1991-epg-sign (cont)
349 (let ((context (epg-make-context))
350 headers cte signers signature)
352 (setq signers (epa-select-keys context "Select keys for signing.
353 If no one is selected, default secret key is used. "
355 (setq signers (list (car (epg-list-keys
357 (message-options-get 'mml-sender) t)))))
358 (epg-context-set-armor context t)
359 (epg-context-set-textmode context t)
360 (epg-context-set-signers context signers)
361 (epg-context-set-passphrase-callback
363 #'mml1991-epg-passphrase-callback)
364 ;; Don't sign headers.
365 (goto-char (point-min))
366 (when (re-search-forward "^$" nil t)
367 (setq headers (buffer-substring (point-min) (point)))
369 (narrow-to-region (point-min) (point))
370 (setq cte (mail-fetch-field "content-transfer-encoding")))
372 (delete-region (point-min) (point))
374 (setq cte (intern (downcase cte)))
375 (mm-decode-content-transfer-encoding cte)))
376 (condition-case error
377 (setq signature (epg-sign-string context (buffer-string) 'clear)
378 mml1991-epg-secret-key-id-list nil)
380 (while mml1991-epg-secret-key-id-list
381 (password-cache-remove (car mml1991-epg-secret-key-id-list))
382 (setq mml1991-epg-secret-key-id-list
383 (cdr mml1991-epg-secret-key-id-list)))
384 (signal (car error) (cdr error))))
385 (delete-region (point-min) (point-max))
386 (mm-with-unibyte-current-buffer
388 (goto-char (point-min))
389 (while (re-search-forward "\r+$" nil t)
390 (replace-match "" t t))
392 (mm-encode-content-transfer-encoding cte))
393 (goto-char (point-min))
399 (defun mml1991-epg-encrypt (cont &optional sign)
400 (goto-char (point-min))
401 (when (re-search-forward "^$" nil t)
402 (let ((cte (save-restriction
403 (narrow-to-region (point-min) (point))
404 (mail-fetch-field "content-transfer-encoding"))))
405 ;; Strip MIME headers since it will be ASCII armoured.
407 (delete-region (point-min) (point))
409 (mm-decode-content-transfer-encoding (intern (downcase cte))))))
410 (let ((context (epg-make-context))
412 (if (or mml1991-verbose
413 (null (message-options-get 'message-recipients)))
415 (epa-select-keys context "Select recipients for encryption.
416 If no one is selected, symmetric encryption will be performed. "
417 (if (message-options-get 'message-recipients)
419 (message-options-get 'message-recipients)
420 "[ \f\t\n\r\v,]+"))))
422 (mapcar (lambda (name)
423 (car (epg-list-keys context name)))
425 (message-options-get 'message-recipients)
426 "[ \f\t\n\r\v,]+"))))
427 (epg-context-set-armor context t)
428 (epg-context-set-textmode context t)
429 (epg-context-set-passphrase-callback
431 #'mml1991-epg-passphrase-callback)
432 (condition-case error
434 (epg-encrypt-string context (buffer-string) recipients sign)
435 mml1991-epg-secret-key-id-list nil)
437 (while mml1991-epg-secret-key-id-list
438 (password-cache-remove (car mml1991-epg-secret-key-id-list))
439 (setq mml1991-epg-secret-key-id-list
440 (cdr mml1991-epg-secret-key-id-list)))
441 (signal (car error) (cdr error))))
442 (delete-region (point-min) (point-max))
443 (insert "\n" cipher))
447 (defun mml1991-encrypt (cont &optional sign)
448 (let ((func (nth 2 (assq mml1991-use mml1991-function-alist))))
450 (funcall func cont sign)
451 (error "Cannot find encrypt function"))))
454 (defun mml1991-sign (cont)
455 (let ((func (nth 1 (assq mml1991-use mml1991-function-alist))))
458 (error "Cannot find sign function"))))
463 ;; coding: iso-8859-1
466 ;;; arch-tag: e542be18-ab28-4393-9b33-97fe9cf30706
467 ;;; mml1991.el ends here