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 (unless (condition-case err
179 (funcall mml2015-verify-function)
181 (mm-set-handle-multipart-parameter
182 mm-security-handle 'gnus-details (cadr err))
185 (mm-set-handle-multipart-parameter
186 mm-security-handle 'gnus-details "Quit.")
188 (mm-set-handle-multipart-parameter
189 mm-security-handle 'gnus-info "Failed")
190 (throw 'error handle)))
191 (mm-set-handle-multipart-parameter
192 mm-security-handle 'gnus-info "OK")
195 (defun mml2015-mailcrypt-clear-verify ()
196 (if (condition-case err
197 (funcall mml2015-verify-function)
199 (mm-set-handle-multipart-parameter
200 mm-security-handle 'gnus-details (cadr err))
203 (mm-set-handle-multipart-parameter
204 mm-security-handle 'gnus-details "Quit.")
206 (mm-set-handle-multipart-parameter
207 mm-security-handle 'gnus-info "OK")
208 (mm-set-handle-multipart-parameter
209 mm-security-handle 'gnus-info "Failed")))
211 (defun mml2015-mailcrypt-sign (cont)
212 (mc-sign-generic (message-options-get 'message-sender)
215 (funcall mml-boundary-function (incf mml-multipart-number)))
217 (goto-char (point-min))
218 (unless (re-search-forward "^-----BEGIN PGP SIGNED MESSAGE-----\r?$" nil t)
219 (error "Cannot find signed begin line." ))
220 (goto-char (match-beginning 0))
222 (unless (looking-at "Hash:[ \t]*\\([a-zA-Z0-9]+\\)")
223 (error "Cannot not find PGP hash." ))
224 (setq hash (match-string 1))
225 (unless (re-search-forward "^$" nil t)
226 (error "Cannot not find PGP message." ))
228 (delete-region (point-min) (point))
229 (insert (format "Content-Type: multipart/signed; boundary=\"%s\";\n"
231 (insert (format "\tmicalg=pgp-%s; protocol=\"application/pgp-signature\"\n"
233 (insert (format "\n--%s\n" boundary))
235 (goto-char (point-max))
236 (unless (re-search-backward "^-----END PGP SIGNATURE-----\r?$" nil t)
237 (error "Cannot find signature part." ))
238 (replace-match "-----END PGP MESSAGE-----" t t)
239 (goto-char (match-beginning 0))
240 (unless (re-search-backward "^-----BEGIN PGP SIGNATURE-----\r?$"
242 (error "Cannot find signature part." ))
243 (replace-match "-----BEGIN PGP MESSAGE-----" t t)
244 (goto-char (match-beginning 0))
246 (narrow-to-region point (point))
248 (while (re-search-forward "^- -" nil t)
249 (replace-match "-" t t))
250 (goto-char (point-max)))
251 (insert (format "--%s\n" boundary))
252 (insert "Content-Type: application/pgp-signature\n\n")
253 (goto-char (point-max))
254 (insert (format "--%s--\n" boundary))
255 (goto-char (point-max))))
257 (defun mml2015-mailcrypt-encrypt (cont)
258 (let ((mc-pgp-always-sign
259 (or mc-pgp-always-sign
260 (eq t (or (message-options-get 'message-sign-encrypt)
262 'message-sign-encrypt
263 (or (y-or-n-p "Sign the message? ")
266 (mm-with-unibyte-current-buffer-mule4
268 (or (message-options-get 'message-recipients)
269 (message-options-set 'message-recipients
270 (mc-cleanup-recipient-headers
271 (read-string "Recipients: "))))
273 (message-options-get 'message-sender))))
274 (goto-char (point-min))
275 (unless (looking-at "-----BEGIN PGP MESSAGE-----")
276 (error "Fail to encrypt the message."))
278 (funcall mml-boundary-function (incf mml-multipart-number))))
279 (insert (format "Content-Type: multipart/encrypted; boundary=\"%s\";\n"
281 (insert "\tprotocol=\"application/pgp-encrypted\"\n\n")
282 (insert (format "--%s\n" boundary))
283 (insert "Content-Type: application/pgp-encrypted\n\n")
284 (insert "Version: 1\n\n")
285 (insert (format "--%s\n" boundary))
286 (insert "Content-Type: application/octet-stream\n\n")
287 (goto-char (point-max))
288 (insert (format "--%s--\n" boundary))
289 (goto-char (point-max))))
294 (autoload 'gpg-decrypt "gpg")
295 (autoload 'gpg-verify "gpg")
296 (autoload 'gpg-verify-cleartext "gpg")
297 (autoload 'gpg-sign-detached "gpg")
298 (autoload 'gpg-sign-encrypt "gpg")
299 (autoload 'gpg-passphrase-read "gpg"))
301 (defun mml2015-gpg-passphrase ()
302 (or (message-options-get 'gpg-passphrase)
303 (message-options-set 'gpg-passphrase (gpg-passphrase-read))))
305 (defun mml2015-gpg-decrypt-1 ()
306 (let ((cipher (current-buffer)) plain result)
307 (if (with-temp-buffer
309 (gpg-decrypt cipher (setq plain (current-buffer))
310 mml2015-result-buffer nil)
311 (mm-set-handle-multipart-parameter
312 mm-security-handle 'gnus-details
313 (with-current-buffer mml2015-result-buffer
317 (insert-buffer plain)))
319 ;; Some wrong with the return value, check plain text buffer.
320 (if (> (point-max) (point-min))
324 (defun mml2015-gpg-decrypt (handle ctl)
325 (let ((mml2015-decrypt-function 'mml2015-gpg-decrypt-1))
326 (mml2015-mailcrypt-decrypt handle ctl)))
328 (defun mml2015-gpg-clear-decrypt ()
330 (setq result (mml2015-gpg-decrypt-1))
332 (mm-set-handle-multipart-parameter
333 mm-security-handle 'gnus-info "OK")
334 (mm-set-handle-multipart-parameter
335 mm-security-handle 'gnus-info "Failed"))))
337 (defun mml2015-gpg-extract-from ()
338 (goto-char (point-min))
339 (if (re-search-forward "^gpg: Good signature from \"\\(.*\\)\"$" nil t)
341 "From unknown user"))
343 (defun mml2015-gpg-verify (handle ctl)
345 (let (part message signature)
346 (unless (setq part (mm-find-raw-part-by-type
347 ctl (or (mm-handle-multipart-ctl-parameter
349 "application/pgp-signature")
351 (mm-set-handle-multipart-parameter
352 mm-security-handle 'gnus-info "Corrupted")
353 (throw 'error handle))
355 (setq message (current-buffer))
358 (setq signature (current-buffer))
359 (unless (setq part (mm-find-part-by-type
360 (cdr handle) "application/pgp-signature" nil t))
361 (mm-set-handle-multipart-parameter
362 mm-security-handle 'gnus-info "Corrupted")
363 (throw 'error handle))
364 (mm-insert-part part)
365 (unless (condition-case err
367 (gpg-verify message signature mml2015-result-buffer)
368 (mm-set-handle-multipart-parameter
369 mm-security-handle 'gnus-details
370 (with-current-buffer mml2015-result-buffer
373 (mm-set-handle-multipart-parameter
374 mm-security-handle 'gnus-details (cadr err))
377 (mm-set-handle-multipart-parameter
378 mm-security-handle 'gnus-details "Quit.")
380 (mm-set-handle-multipart-parameter
381 mm-security-handle 'gnus-info "Failed")
382 (throw 'error handle)))
383 (mm-set-handle-multipart-parameter
384 mm-security-handle 'gnus-info
385 (with-current-buffer mml2015-result-buffer
386 (mml2015-gpg-extract-from))))
389 (defun mml2015-gpg-clear-verify ()
390 (if (condition-case err
392 (gpg-verify-cleartext (current-buffer) mml2015-result-buffer)
393 (mm-set-handle-multipart-parameter
394 mm-security-handle 'gnus-details
395 (with-current-buffer mml2015-result-buffer
398 (mm-set-handle-multipart-parameter
399 mm-security-handle 'gnus-details (cadr err))
402 (mm-set-handle-multipart-parameter
403 mm-security-handle 'gnus-details "Quit.")
405 (mm-set-handle-multipart-parameter
406 mm-security-handle 'gnus-info
407 (with-current-buffer mml2015-result-buffer
408 (mml2015-gpg-extract-from)))
409 (mm-set-handle-multipart-parameter
410 mm-security-handle 'gnus-info "Failed")))
412 (defun mml2015-gpg-sign (cont)
414 (funcall mml-boundary-function (incf mml-multipart-number)))
415 (text (current-buffer)) signature)
416 (goto-char (point-max))
420 (unless (gpg-sign-detached text (setq signature (current-buffer))
421 mml2015-result-buffer
423 (message-options-get 'message-sender)
424 t t) ; armor & textmode
425 (unless (> (point-max) (point-min))
426 (pop-to-buffer mml2015-result-buffer)
427 (error "Sign error.")))
428 (goto-char (point-min))
429 (while (re-search-forward "\r+$" nil t)
430 (replace-match "" t t))
432 (goto-char (point-min))
433 (insert (format "Content-Type: multipart/signed; boundary=\"%s\";\n"
435 ;;; FIXME: what is the micalg?
436 (insert "\tmicalg=pgp-sha1; protocol=\"application/pgp-signature\"\n")
437 (insert (format "\n--%s\n" boundary))
438 (goto-char (point-max))
439 (insert (format "\n--%s\n" boundary))
440 (insert "Content-Type: application/pgp-signature\n\n")
441 (insert-buffer signature)
442 (goto-char (point-max))
443 (insert (format "--%s--\n" boundary))
444 (goto-char (point-max)))))
446 (defun mml2015-gpg-encrypt (cont)
448 (funcall mml-boundary-function (incf mml-multipart-number)))
449 (text (current-buffer))
451 (mm-with-unibyte-current-buffer-mule4
453 (unless (gpg-sign-encrypt
454 text (setq cipher (current-buffer))
455 mml2015-result-buffer
458 (message-options-get 'message-recipients)
459 (message-options-set 'message-recipients
460 (read-string "Recipients: ")))
463 (message-options-get 'message-sender)
464 t t) ; armor & textmode
465 (unless (> (point-max) (point-min))
466 (pop-to-buffer mml2015-result-buffer)
467 (error "Encrypt error.")))
468 (goto-char (point-min))
469 (while (re-search-forward "\r+$" nil t)
470 (replace-match "" t t))
472 (delete-region (point-min) (point-max))
473 (insert (format "Content-Type: multipart/encrypted; boundary=\"%s\";\n"
475 (insert "\tprotocol=\"application/pgp-encrypted\"\n\n")
476 (insert (format "--%s\n" boundary))
477 (insert "Content-Type: application/pgp-encrypted\n\n")
478 (insert "Version: 1\n\n")
479 (insert (format "--%s\n" boundary))
480 (insert "Content-Type: application/octet-stream\n\n")
481 (insert-buffer cipher)
482 (goto-char (point-max))
483 (insert (format "--%s--\n" boundary))
484 (goto-char (point-max))))))
488 (defun mml2015-clean-buffer ()
489 (if (gnus-buffer-live-p mml2015-result-buffer)
490 (with-current-buffer mml2015-result-buffer
493 (setq mml2015-result-buffer
494 (gnus-get-buffer-create "*MML2015 Result*"))
497 (defsubst mml2015-clear-decrypt-function ()
498 (nth 6 (assq mml2015-use mml2015-function-alist)))
500 (defsubst mml2015-clear-verify-function ()
501 (nth 5 (assq mml2015-use mml2015-function-alist)))
504 (defun mml2015-decrypt (handle ctl)
505 (mml2015-clean-buffer)
506 (let ((func (nth 4 (assq mml2015-use mml2015-function-alist))))
508 (funcall func handle ctl)
512 (defun mml2015-decrypt-test (handle ctl)
516 (defun mml2015-verify (handle ctl)
517 (mml2015-clean-buffer)
518 (let ((func (nth 3 (assq mml2015-use mml2015-function-alist))))
520 (funcall func handle ctl)
524 (defun mml2015-verify-test (handle ctl)
528 (defun mml2015-encrypt (cont)
529 (mml2015-clean-buffer)
530 (let ((func (nth 2 (assq mml2015-use mml2015-function-alist))))
533 (error "Cannot find encrypt function."))))
536 (defun mml2015-sign (cont)
537 (mml2015-clean-buffer)
538 (let ((func (nth 1 (assq mml2015-use mml2015-function-alist))))
541 (error "Cannot find sign function."))))
544 (defun mml2015-self-encrypt ()
545 (mml2015-encrypt nil))
549 ;;; mml2015.el ends here