1 ;;; mml2015.el --- MIME Security with Pretty Good Privacy (PGP)
2 ;; Copyright (C) 2000, 2001 Free Software Foundation, Inc.
4 ;; Author: Shenghuo Zhu <zsh@cs.rochester.edu>
5 ;; Keywords: PGP MIME MML
7 ;; This file is part of GNU Emacs.
9 ;; GNU Emacs is free software; you can redistribute it and/or modify
10 ;; it under the terms of the GNU General Public License as published
11 ;; by the Free Software Foundation; either version 2, or (at your
12 ;; option) any later version.
14 ;; GNU Emacs is distributed in the hope that it will be useful, but
15 ;; WITHOUT ANY WARRANTY; without even the implied warranty of
16 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17 ;; General Public License for more details.
19 ;; You should have received a copy of the GNU General Public License
20 ;; along with GNU Emacs; see the file COPYING. If not, write to the
21 ;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
22 ;; Boston, MA 02111-1307, USA.
28 (eval-when-compile (require 'cl))
31 (defvar mml2015-use (or
35 (and (fboundp 'gpg-sign-detached)
39 (and (fboundp 'mc-encrypt-generic)
40 (fboundp 'mc-sign-generic)
41 (fboundp 'mc-cleanup-recipient-headers)
43 "The package used for PGP/MIME.")
45 ;; Something is not RFC2015.
46 (defvar mml2015-function-alist
47 '((mailcrypt mml2015-mailcrypt-sign
48 mml2015-mailcrypt-encrypt
49 mml2015-mailcrypt-verify
50 mml2015-mailcrypt-decrypt
51 mml2015-mailcrypt-clear-verify
52 mml2015-mailcrypt-clear-decrypt)
57 mml2015-gpg-clear-verify
58 mml2015-gpg-clear-decrypt))
59 "Alist of PGP/MIME functions.")
61 (defvar mml2015-result-buffer nil)
66 (autoload 'mailcrypt-decrypt "mailcrypt")
67 (autoload 'mailcrypt-verify "mailcrypt")
68 (autoload 'mc-pgp-always-sign "mailcrypt")
69 (autoload 'mc-encrypt-generic "mc-toplev")
70 (autoload 'mc-cleanup-recipient-headers "mc-toplev")
71 (autoload 'mc-sign-generic "mc-toplev"))
74 (defvar mc-default-scheme)
77 (defvar mml2015-decrypt-function 'mailcrypt-decrypt)
78 (defvar mml2015-verify-function 'mailcrypt-verify)
80 (defun mml2015-mailcrypt-decrypt (handle ctl)
82 (let (child handles result)
83 (unless (setq child (mm-find-part-by-type
85 "application/octet-stream" nil t))
86 (mm-set-handle-multipart-parameter
87 mm-security-handle 'gnus-info "Corrupted")
88 (throw 'error handle))
90 (mm-insert-part child)
93 (funcall mml2015-decrypt-function)
95 (mm-set-handle-multipart-parameter
96 mm-security-handle 'gnus-details (cadr err))
99 (mm-set-handle-multipart-parameter
100 mm-security-handle 'gnus-details "Quit.")
103 (mm-set-handle-multipart-parameter
104 mm-security-handle 'gnus-info "Failed")
105 (throw 'error handle))
106 (setq handles (mm-dissect-buffer t)))
107 (mm-destroy-parts handle)
108 (mm-set-handle-multipart-parameter
109 mm-security-handle 'gnus-info "OK")
110 (if (listp (car handles))
114 (defun mml2015-mailcrypt-clear-decrypt ()
118 (funcall mml2015-decrypt-function)
120 (mm-set-handle-multipart-parameter
121 mm-security-handle 'gnus-details (cadr err))
124 (mm-set-handle-multipart-parameter
125 mm-security-handle 'gnus-details "Quit.")
128 (mm-set-handle-multipart-parameter
129 mm-security-handle 'gnus-info "OK")
130 (mm-set-handle-multipart-parameter
131 mm-security-handle 'gnus-info "Failed"))))
133 (defun mml2015-fix-micalg (alg)
135 (upcase (if (string-match "^pgp-" alg)
136 (substring alg (match-end 0))
139 (defun mml2015-mailcrypt-verify (handle ctl)
142 (unless (setq part (mm-find-raw-part-by-type
143 ctl (or (mm-handle-multipart-ctl-parameter
145 "application/pgp-signature")
147 (mm-set-handle-multipart-parameter
148 mm-security-handle 'gnus-info "Corrupted")
149 (throw 'error handle))
151 (insert "-----BEGIN PGP SIGNED MESSAGE-----\n")
152 (insert (format "Hash: %s\n\n"
153 (or (mml2015-fix-micalg
154 (mm-handle-multipart-ctl-parameter
158 (narrow-to-region (point) (point))
160 (goto-char (point-min))
162 (if (looking-at "^-")
165 (unless (setq part (mm-find-part-by-type
166 (cdr handle) "application/pgp-signature" nil t))
167 (mm-set-handle-multipart-parameter
168 mm-security-handle 'gnus-info "Corrupted")
169 (throw 'error handle))
171 (narrow-to-region (point) (point))
172 (mm-insert-part part)
173 (goto-char (point-min))
174 (if (re-search-forward "^-----BEGIN PGP [^-]+-----\r?$" nil t)
175 (replace-match "-----BEGIN PGP SIGNATURE-----" t t))
176 (if (re-search-forward "^-----END PGP [^-]+-----\r?$" nil t)
177 (replace-match "-----END PGP SIGNATURE-----" t t)))
178 (let ((mc-gpg-debug-buffer (get-buffer-create " *gnus gpg debug*")))
179 (unless (condition-case err
181 (funcall mml2015-verify-function)
182 (if (get-buffer " *mailcrypt stderr temp")
183 (mm-set-handle-multipart-parameter
184 mm-security-handle 'gnus-details
185 (with-current-buffer " *mailcrypt stderr temp"
187 (if (get-buffer " *mailcrypt stdout temp")
188 (kill-buffer " *mailcrypt stdout temp"))
189 (if (get-buffer " *mailcrypt stderr temp")
190 (kill-buffer " *mailcrypt stderr temp"))
191 (if (get-buffer " *mailcrypt status temp")
192 (kill-buffer " *mailcrypt status temp"))
193 (if (get-buffer mc-gpg-debug-buffer)
194 (kill-buffer mc-gpg-debug-buffer)))
196 (mm-set-handle-multipart-parameter
197 mm-security-handle 'gnus-details (cadr err))
200 (mm-set-handle-multipart-parameter
201 mm-security-handle 'gnus-details "Quit.")
203 (mm-set-handle-multipart-parameter
204 mm-security-handle 'gnus-info "Failed")
205 (throw 'error handle))))
206 (mm-set-handle-multipart-parameter
207 mm-security-handle 'gnus-info "OK")
210 (defun mml2015-mailcrypt-clear-verify ()
211 (let ((mc-gpg-debug-buffer (get-buffer-create " *gnus gpg debug*")))
212 (if (condition-case err
214 (funcall mml2015-verify-function)
215 (if (get-buffer " *mailcrypt stderr temp")
216 (mm-set-handle-multipart-parameter
217 mm-security-handle 'gnus-details
218 (with-current-buffer " *mailcrypt stderr temp"
220 (if (get-buffer " *mailcrypt stdout temp")
221 (kill-buffer " *mailcrypt stdout temp"))
222 (if (get-buffer " *mailcrypt stderr temp")
223 (kill-buffer " *mailcrypt stderr temp"))
224 (if (get-buffer " *mailcrypt status temp")
225 (kill-buffer " *mailcrypt status temp"))
226 (if (get-buffer mc-gpg-debug-buffer)
227 (kill-buffer mc-gpg-debug-buffer)))
229 (mm-set-handle-multipart-parameter
230 mm-security-handle 'gnus-details (cadr err))
233 (mm-set-handle-multipart-parameter
234 mm-security-handle 'gnus-details "Quit.")
236 (mm-set-handle-multipart-parameter
237 mm-security-handle 'gnus-info "OK")
238 (mm-set-handle-multipart-parameter
239 mm-security-handle 'gnus-info "Failed"))))
241 (defun mml2015-mailcrypt-sign (cont)
242 (mc-sign-generic (message-options-get 'message-sender)
245 (funcall mml-boundary-function (incf mml-multipart-number)))
247 (goto-char (point-min))
248 (unless (re-search-forward "^-----BEGIN PGP SIGNED MESSAGE-----\r?$" nil t)
249 (error "Cannot find signed begin line." ))
250 (goto-char (match-beginning 0))
252 (unless (looking-at "Hash:[ \t]*\\([a-zA-Z0-9]+\\)")
253 (error "Cannot not find PGP hash." ))
254 (setq hash (match-string 1))
255 (unless (re-search-forward "^$" nil t)
256 (error "Cannot not find PGP message." ))
258 (delete-region (point-min) (point))
259 (insert (format "Content-Type: multipart/signed; boundary=\"%s\";\n"
261 (insert (format "\tmicalg=pgp-%s; protocol=\"application/pgp-signature\"\n"
263 (insert (format "\n--%s\n" boundary))
265 (goto-char (point-max))
266 (unless (re-search-backward "^-----END PGP SIGNATURE-----\r?$" nil t)
267 (error "Cannot find signature part." ))
268 (replace-match "-----END PGP MESSAGE-----" t t)
269 (goto-char (match-beginning 0))
270 (unless (re-search-backward "^-----BEGIN PGP SIGNATURE-----\r?$"
272 (error "Cannot find signature part." ))
273 (replace-match "-----BEGIN PGP MESSAGE-----" t t)
274 (goto-char (match-beginning 0))
276 (narrow-to-region point (point))
278 (while (re-search-forward "^- -" nil t)
279 (replace-match "-" t t))
280 (goto-char (point-max)))
281 (insert (format "--%s\n" boundary))
282 (insert "Content-Type: application/pgp-signature\n\n")
283 (goto-char (point-max))
284 (insert (format "--%s--\n" boundary))
285 (goto-char (point-max))))
287 (defun mml2015-mailcrypt-encrypt (cont)
288 (let ((mc-pgp-always-sign
289 (or mc-pgp-always-sign
290 (eq t (or (message-options-get 'message-sign-encrypt)
292 'message-sign-encrypt
293 (or (y-or-n-p "Sign the message? ")
296 (mm-with-unibyte-current-buffer-mule4
298 (or (message-options-get 'message-recipients)
299 (message-options-set 'message-recipients
300 (mc-cleanup-recipient-headers
301 (read-string "Recipients: "))))
303 (message-options-get 'message-sender))))
304 (goto-char (point-min))
305 (unless (looking-at "-----BEGIN PGP MESSAGE-----")
306 (error "Fail to encrypt the message."))
308 (funcall mml-boundary-function (incf mml-multipart-number))))
309 (insert (format "Content-Type: multipart/encrypted; boundary=\"%s\";\n"
311 (insert "\tprotocol=\"application/pgp-encrypted\"\n\n")
312 (insert (format "--%s\n" boundary))
313 (insert "Content-Type: application/pgp-encrypted\n\n")
314 (insert "Version: 1\n\n")
315 (insert (format "--%s\n" boundary))
316 (insert "Content-Type: application/octet-stream\n\n")
317 (goto-char (point-max))
318 (insert (format "--%s--\n" boundary))
319 (goto-char (point-max))))
324 (autoload 'gpg-decrypt "gpg")
325 (autoload 'gpg-verify "gpg")
326 (autoload 'gpg-verify-cleartext "gpg")
327 (autoload 'gpg-sign-detached "gpg")
328 (autoload 'gpg-sign-encrypt "gpg")
329 (autoload 'gpg-passphrase-read "gpg"))
331 (defun mml2015-gpg-passphrase ()
332 (or (message-options-get 'gpg-passphrase)
333 (message-options-set 'gpg-passphrase (gpg-passphrase-read))))
335 (defun mml2015-gpg-decrypt-1 ()
336 (let ((cipher (current-buffer)) plain result)
337 (if (with-temp-buffer
339 (gpg-decrypt cipher (setq plain (current-buffer))
340 mml2015-result-buffer nil)
341 (mm-set-handle-multipart-parameter
342 mm-security-handle 'gnus-details
343 (with-current-buffer mml2015-result-buffer
347 (insert-buffer plain)))
349 ;; Some wrong with the return value, check plain text buffer.
350 (if (> (point-max) (point-min))
354 (defun mml2015-gpg-decrypt (handle ctl)
355 (let ((mml2015-decrypt-function 'mml2015-gpg-decrypt-1))
356 (mml2015-mailcrypt-decrypt handle ctl)))
358 (defun mml2015-gpg-clear-decrypt ()
360 (setq result (mml2015-gpg-decrypt-1))
362 (mm-set-handle-multipart-parameter
363 mm-security-handle 'gnus-info "OK")
364 (mm-set-handle-multipart-parameter
365 mm-security-handle 'gnus-info "Failed"))))
367 (defun mml2015-gpg-extract-from ()
368 (goto-char (point-min))
369 (if (re-search-forward "^gpg: Good signature from \"\\(.*\\)\"$" nil t)
371 "From unknown user"))
373 (defun mml2015-gpg-verify (handle ctl)
375 (let (part message signature)
376 (unless (setq part (mm-find-raw-part-by-type
377 ctl (or (mm-handle-multipart-ctl-parameter
379 "application/pgp-signature")
381 (mm-set-handle-multipart-parameter
382 mm-security-handle 'gnus-info "Corrupted")
383 (throw 'error handle))
385 (setq message (current-buffer))
388 (setq signature (current-buffer))
389 (unless (setq part (mm-find-part-by-type
390 (cdr handle) "application/pgp-signature" nil t))
391 (mm-set-handle-multipart-parameter
392 mm-security-handle 'gnus-info "Corrupted")
393 (throw 'error handle))
394 (mm-insert-part part)
395 (unless (condition-case err
397 (gpg-verify message signature mml2015-result-buffer)
398 (mm-set-handle-multipart-parameter
399 mm-security-handle 'gnus-details
400 (with-current-buffer mml2015-result-buffer
403 (mm-set-handle-multipart-parameter
404 mm-security-handle 'gnus-details (cadr err))
407 (mm-set-handle-multipart-parameter
408 mm-security-handle 'gnus-details "Quit.")
410 (mm-set-handle-multipart-parameter
411 mm-security-handle 'gnus-info "Failed")
412 (throw 'error handle)))
413 (mm-set-handle-multipart-parameter
414 mm-security-handle 'gnus-info
415 (with-current-buffer mml2015-result-buffer
416 (mml2015-gpg-extract-from))))
419 (defun mml2015-gpg-clear-verify ()
420 (if (condition-case err
422 (gpg-verify-cleartext (current-buffer) mml2015-result-buffer)
423 (mm-set-handle-multipart-parameter
424 mm-security-handle 'gnus-details
425 (with-current-buffer mml2015-result-buffer
428 (mm-set-handle-multipart-parameter
429 mm-security-handle 'gnus-details (cadr err))
432 (mm-set-handle-multipart-parameter
433 mm-security-handle 'gnus-details "Quit.")
435 (mm-set-handle-multipart-parameter
436 mm-security-handle 'gnus-info
437 (with-current-buffer mml2015-result-buffer
438 (mml2015-gpg-extract-from)))
439 (mm-set-handle-multipart-parameter
440 mm-security-handle 'gnus-info "Failed")))
442 (defun mml2015-gpg-sign (cont)
444 (funcall mml-boundary-function (incf mml-multipart-number)))
445 (text (current-buffer)) signature)
446 (goto-char (point-max))
450 (unless (gpg-sign-detached text (setq signature (current-buffer))
451 mml2015-result-buffer
453 (message-options-get 'message-sender)
454 t t) ; armor & textmode
455 (unless (> (point-max) (point-min))
456 (pop-to-buffer mml2015-result-buffer)
457 (error "Sign error.")))
458 (goto-char (point-min))
459 (while (re-search-forward "\r+$" nil t)
460 (replace-match "" t t))
462 (goto-char (point-min))
463 (insert (format "Content-Type: multipart/signed; boundary=\"%s\";\n"
465 ;;; FIXME: what is the micalg?
466 (insert "\tmicalg=pgp-sha1; protocol=\"application/pgp-signature\"\n")
467 (insert (format "\n--%s\n" boundary))
468 (goto-char (point-max))
469 (insert (format "\n--%s\n" boundary))
470 (insert "Content-Type: application/pgp-signature\n\n")
471 (insert-buffer signature)
472 (goto-char (point-max))
473 (insert (format "--%s--\n" boundary))
474 (goto-char (point-max)))))
476 (defun mml2015-gpg-encrypt (cont)
478 (funcall mml-boundary-function (incf mml-multipart-number)))
479 (text (current-buffer))
481 (mm-with-unibyte-current-buffer-mule4
483 (unless (gpg-sign-encrypt
484 text (setq cipher (current-buffer))
485 mml2015-result-buffer
488 (message-options-get 'message-recipients)
489 (message-options-set 'message-recipients
490 (read-string "Recipients: ")))
493 (message-options-get 'message-sender)
494 t t) ; armor & textmode
495 (unless (> (point-max) (point-min))
496 (pop-to-buffer mml2015-result-buffer)
497 (error "Encrypt error.")))
498 (goto-char (point-min))
499 (while (re-search-forward "\r+$" nil t)
500 (replace-match "" t t))
502 (delete-region (point-min) (point-max))
503 (insert (format "Content-Type: multipart/encrypted; boundary=\"%s\";\n"
505 (insert "\tprotocol=\"application/pgp-encrypted\"\n\n")
506 (insert (format "--%s\n" boundary))
507 (insert "Content-Type: application/pgp-encrypted\n\n")
508 (insert "Version: 1\n\n")
509 (insert (format "--%s\n" boundary))
510 (insert "Content-Type: application/octet-stream\n\n")
511 (insert-buffer cipher)
512 (goto-char (point-max))
513 (insert (format "--%s--\n" boundary))
514 (goto-char (point-max))))))
518 (defun mml2015-clean-buffer ()
519 (if (gnus-buffer-live-p mml2015-result-buffer)
520 (with-current-buffer mml2015-result-buffer
523 (setq mml2015-result-buffer
524 (gnus-get-buffer-create "*MML2015 Result*"))
527 (defsubst mml2015-clear-decrypt-function ()
528 (nth 6 (assq mml2015-use mml2015-function-alist)))
530 (defsubst mml2015-clear-verify-function ()
531 (nth 5 (assq mml2015-use mml2015-function-alist)))
534 (defun mml2015-decrypt (handle ctl)
535 (mml2015-clean-buffer)
536 (let ((func (nth 4 (assq mml2015-use mml2015-function-alist))))
538 (funcall func handle ctl)
542 (defun mml2015-decrypt-test (handle ctl)
546 (defun mml2015-verify (handle ctl)
547 (mml2015-clean-buffer)
548 (let ((func (nth 3 (assq mml2015-use mml2015-function-alist))))
550 (funcall func handle ctl)
554 (defun mml2015-verify-test (handle ctl)
558 (defun mml2015-encrypt (cont)
559 (mml2015-clean-buffer)
560 (let ((func (nth 2 (assq mml2015-use mml2015-function-alist))))
563 (error "Cannot find encrypt function."))))
566 (defun mml2015-sign (cont)
567 (mml2015-clean-buffer)
568 (let ((func (nth 1 (assq mml2015-use mml2015-function-alist))))
571 (error "Cannot find sign function."))))
574 (defun mml2015-self-encrypt ()
575 (mml2015-encrypt nil))
579 ;;; mml2015.el ends here