1 ;;; mml2015.el --- MIME Security with Pretty Good Privacy (PGP)
3 ;; Copyright (C) 2000, 2001, 2002, 2003, 2004,
4 ;; 2005, 2006 Free Software Foundation, Inc.
6 ;; Author: Shenghuo Zhu <zsh@cs.rochester.edu>
7 ;; Keywords: PGP MIME MML
9 ;; This file is part of GNU Emacs.
11 ;; GNU Emacs is free software; you can redistribute it and/or modify
12 ;; it under the terms of the GNU General Public License as published
13 ;; by the Free Software Foundation; either version 2, or (at your
14 ;; option) any later version.
16 ;; GNU Emacs is distributed in the hope that it will be useful, but
17 ;; WITHOUT ANY WARRANTY; without even the implied warranty of
18 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
19 ;; General Public License for more details.
21 ;; You should have received a copy of the GNU General Public License
22 ;; along with GNU Emacs; see the file COPYING. If not, write to the
23 ;; Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
24 ;; Boston, MA 02110-1301, USA.
28 ;; RFC 2015 is updated by RFC 3156, this file should be compatible
33 (eval-when-compile (require 'cl))
39 (defvar mc-pgp-always-sign)
41 (defvar mml2015-use (or
44 ;; Avoid the "Recursive load suspected" error
46 (let ((recursive-load-depth-limit 100))
48 (and (fboundp 'pgg-sign-region)
53 (and (fboundp 'gpg-sign-detached)
57 (and (fboundp 'mc-encrypt-generic)
58 (fboundp 'mc-sign-generic)
59 (fboundp 'mc-cleanup-recipient-headers)
61 "The package used for PGP/MIME.
62 Valid packages include `pgg', `gpg' and `mailcrypt'.")
64 ;; Something is not RFC2015.
65 (defvar mml2015-function-alist
66 '((mailcrypt mml2015-mailcrypt-sign
67 mml2015-mailcrypt-encrypt
68 mml2015-mailcrypt-verify
69 mml2015-mailcrypt-decrypt
70 mml2015-mailcrypt-clear-verify
71 mml2015-mailcrypt-clear-decrypt)
76 mml2015-gpg-clear-verify
77 mml2015-gpg-clear-decrypt)
82 mml2015-pgg-clear-verify
83 mml2015-pgg-clear-decrypt)
88 mml2015-epg-clear-verify
89 mml2015-epg-clear-decrypt))
90 "Alist of PGP/MIME functions.")
92 (defvar mml2015-result-buffer nil)
94 (defcustom mml2015-unabbrev-trust-alist
95 '(("TRUST_UNDEFINED" . nil)
97 ("TRUST_MARGINAL" . t)
99 ("TRUST_ULTIMATE" . t))
100 "Map GnuPG trust output values to a boolean saying if you trust the key."
102 :group 'mime-security
103 :type '(repeat (cons (regexp :tag "GnuPG output regexp")
104 (boolean :tag "Trust key"))))
106 (defcustom mml2015-verbose mml-secure-verbose
107 "If non-nil, ask the user about the current operation more verbosely."
108 :group 'mime-security
111 (defcustom mml2015-cache-passphrase mml-secure-cache-passphrase
112 "If t, cache passphrase."
113 :group 'mime-security
116 (defcustom mml2015-passphrase-cache-expiry mml-secure-passphrase-cache-expiry
117 "How many seconds the passphrase is cached.
118 Whether the passphrase is cached at all is controlled by
119 `mml2015-cache-passphrase'."
120 :group 'mime-security
123 (defcustom mml2015-signers nil
124 "A list of key ID which will be used to sign a message."
125 :group 'mime-security
126 :type '(repeat (string :tag "Key ID")))
128 ;;; mailcrypt wrapper
131 (autoload 'mailcrypt-decrypt "mailcrypt")
132 (autoload 'mailcrypt-verify "mailcrypt")
133 (autoload 'mc-pgp-always-sign "mailcrypt")
134 (autoload 'mc-encrypt-generic "mc-toplev")
135 (autoload 'mc-cleanup-recipient-headers "mc-toplev")
136 (autoload 'mc-sign-generic "mc-toplev"))
139 (defvar mc-default-scheme)
142 (defvar mml2015-decrypt-function 'mailcrypt-decrypt)
143 (defvar mml2015-verify-function 'mailcrypt-verify)
145 (defun mml2015-format-error (err)
146 (if (stringp (cadr err))
148 (format "%S" (cdr err))))
150 (defun mml2015-mailcrypt-decrypt (handle ctl)
152 (let (child handles result)
153 (unless (setq child (mm-find-part-by-type
155 "application/octet-stream" nil t))
156 (mm-set-handle-multipart-parameter
157 mm-security-handle 'gnus-info "Corrupted")
158 (throw 'error handle))
160 (mm-insert-part child)
163 (funcall mml2015-decrypt-function)
165 (mm-set-handle-multipart-parameter
166 mm-security-handle 'gnus-details (mml2015-format-error err))
169 (mm-set-handle-multipart-parameter
170 mm-security-handle 'gnus-details "Quit.")
173 (mm-set-handle-multipart-parameter
174 mm-security-handle 'gnus-info "Failed")
175 (throw 'error handle))
176 (setq handles (mm-dissect-buffer t)))
177 (mm-destroy-parts handle)
178 (mm-set-handle-multipart-parameter
179 mm-security-handle 'gnus-info
181 (let ((sig (with-current-buffer mml2015-result-buffer
182 (mml2015-gpg-extract-signature-details))))
183 (concat ", Signer: " sig))))
184 (if (listp (car handles))
188 (defun mml2015-mailcrypt-clear-decrypt ()
192 (funcall mml2015-decrypt-function)
194 (mm-set-handle-multipart-parameter
195 mm-security-handle 'gnus-details (mml2015-format-error err))
198 (mm-set-handle-multipart-parameter
199 mm-security-handle 'gnus-details "Quit.")
202 (mm-set-handle-multipart-parameter
203 mm-security-handle 'gnus-info "OK")
204 (mm-set-handle-multipart-parameter
205 mm-security-handle 'gnus-info "Failed"))))
207 (defun mml2015-fix-micalg (alg)
209 ;; Mutt/1.2.5i has seen sending micalg=php-sha1
210 (upcase (if (string-match "^p[gh]p-" alg)
211 (substring alg (match-end 0))
214 (defun mml2015-mailcrypt-verify (handle ctl)
217 (unless (setq part (mm-find-raw-part-by-type
218 ctl (or (mm-handle-multipart-ctl-parameter
220 "application/pgp-signature")
222 (mm-set-handle-multipart-parameter
223 mm-security-handle 'gnus-info "Corrupted")
224 (throw 'error handle))
226 (insert "-----BEGIN PGP SIGNED MESSAGE-----\n")
227 (insert (format "Hash: %s\n\n"
228 (or (mml2015-fix-micalg
229 (mm-handle-multipart-ctl-parameter
233 (narrow-to-region (point) (point))
235 (goto-char (point-min))
237 (if (looking-at "^-")
240 (unless (setq part (mm-find-part-by-type
241 (cdr handle) "application/pgp-signature" nil t))
242 (mm-set-handle-multipart-parameter
243 mm-security-handle 'gnus-info "Corrupted")
244 (throw 'error handle))
246 (narrow-to-region (point) (point))
247 (mm-insert-part part)
248 (goto-char (point-min))
249 (if (re-search-forward "^-----BEGIN PGP [^-]+-----\r?$" nil t)
250 (replace-match "-----BEGIN PGP SIGNATURE-----" t t))
251 (if (re-search-forward "^-----END PGP [^-]+-----\r?$" nil t)
252 (replace-match "-----END PGP SIGNATURE-----" t t)))
253 (let ((mc-gpg-debug-buffer (get-buffer-create " *gnus gpg debug*")))
254 (unless (condition-case err
256 (funcall mml2015-verify-function)
257 (if (get-buffer " *mailcrypt stderr temp")
258 (mm-set-handle-multipart-parameter
259 mm-security-handle 'gnus-details
260 (with-current-buffer " *mailcrypt stderr temp"
262 (if (get-buffer " *mailcrypt stdout temp")
263 (kill-buffer " *mailcrypt stdout temp"))
264 (if (get-buffer " *mailcrypt stderr temp")
265 (kill-buffer " *mailcrypt stderr temp"))
266 (if (get-buffer " *mailcrypt status temp")
267 (kill-buffer " *mailcrypt status temp"))
268 (if (get-buffer mc-gpg-debug-buffer)
269 (kill-buffer mc-gpg-debug-buffer)))
271 (mm-set-handle-multipart-parameter
272 mm-security-handle 'gnus-details (mml2015-format-error err))
275 (mm-set-handle-multipart-parameter
276 mm-security-handle 'gnus-details "Quit.")
278 (mm-set-handle-multipart-parameter
279 mm-security-handle 'gnus-info "Failed")
280 (throw 'error handle))))
281 (mm-set-handle-multipart-parameter
282 mm-security-handle 'gnus-info "OK")
285 (defun mml2015-mailcrypt-clear-verify ()
286 (let ((mc-gpg-debug-buffer (get-buffer-create " *gnus gpg debug*")))
287 (if (condition-case err
289 (funcall mml2015-verify-function)
290 (if (get-buffer " *mailcrypt stderr temp")
291 (mm-set-handle-multipart-parameter
292 mm-security-handle 'gnus-details
293 (with-current-buffer " *mailcrypt stderr temp"
295 (if (get-buffer " *mailcrypt stdout temp")
296 (kill-buffer " *mailcrypt stdout temp"))
297 (if (get-buffer " *mailcrypt stderr temp")
298 (kill-buffer " *mailcrypt stderr temp"))
299 (if (get-buffer " *mailcrypt status temp")
300 (kill-buffer " *mailcrypt status temp"))
301 (if (get-buffer mc-gpg-debug-buffer)
302 (kill-buffer mc-gpg-debug-buffer)))
304 (mm-set-handle-multipart-parameter
305 mm-security-handle 'gnus-details (mml2015-format-error err))
308 (mm-set-handle-multipart-parameter
309 mm-security-handle 'gnus-details "Quit.")
311 (mm-set-handle-multipart-parameter
312 mm-security-handle 'gnus-info "OK")
313 (mm-set-handle-multipart-parameter
314 mm-security-handle 'gnus-info "Failed"))))
316 (defun mml2015-mailcrypt-sign (cont)
317 (mc-sign-generic (message-options-get 'message-sender)
319 (let ((boundary (mml-compute-boundary cont))
321 (goto-char (point-min))
322 (unless (re-search-forward "^-----BEGIN PGP SIGNED MESSAGE-----\r?$" nil t)
323 (error "Cannot find signed begin line"))
324 (goto-char (match-beginning 0))
326 (unless (looking-at "Hash:[ \t]*\\([a-zA-Z0-9]+\\)")
327 (error "Cannot not find PGP hash"))
328 (setq hash (match-string 1))
329 (unless (re-search-forward "^$" nil t)
330 (error "Cannot not find PGP message"))
332 (delete-region (point-min) (point))
333 (insert (format "Content-Type: multipart/signed; boundary=\"%s\";\n"
335 (insert (format "\tmicalg=pgp-%s; protocol=\"application/pgp-signature\"\n"
337 (insert (format "\n--%s\n" boundary))
339 (goto-char (point-max))
340 (unless (re-search-backward "^-----END PGP SIGNATURE-----\r?$" nil t)
341 (error "Cannot find signature part"))
342 (replace-match "-----END PGP MESSAGE-----" t t)
343 (goto-char (match-beginning 0))
344 (unless (re-search-backward "^-----BEGIN PGP SIGNATURE-----\r?$"
346 (error "Cannot find signature part"))
347 (replace-match "-----BEGIN PGP MESSAGE-----" t t)
348 (goto-char (match-beginning 0))
350 (narrow-to-region point (point))
352 (while (re-search-forward "^- -" nil t)
353 (replace-match "-" t t))
354 (goto-char (point-max)))
355 (insert (format "--%s\n" boundary))
356 (insert "Content-Type: application/pgp-signature\n\n")
357 (goto-char (point-max))
358 (insert (format "--%s--\n" boundary))
359 (goto-char (point-max))))
361 (defun mml2015-mailcrypt-encrypt (cont &optional sign)
362 (let ((mc-pgp-always-sign
363 (or mc-pgp-always-sign
365 (eq t (or (message-options-get 'message-sign-encrypt)
367 'message-sign-encrypt
368 (or (y-or-n-p "Sign the message? ")
371 (mm-with-unibyte-current-buffer
373 (or (message-options-get 'message-recipients)
374 (message-options-set 'message-recipients
375 (mc-cleanup-recipient-headers
376 (read-string "Recipients: "))))
378 (message-options-get 'message-sender))))
379 (goto-char (point-min))
380 (unless (looking-at "-----BEGIN PGP MESSAGE-----")
381 (error "Fail to encrypt the message"))
382 (let ((boundary (mml-compute-boundary cont)))
383 (insert (format "Content-Type: multipart/encrypted; boundary=\"%s\";\n"
385 (insert "\tprotocol=\"application/pgp-encrypted\"\n\n")
386 (insert (format "--%s\n" boundary))
387 (insert "Content-Type: application/pgp-encrypted\n\n")
388 (insert "Version: 1\n\n")
389 (insert (format "--%s\n" boundary))
390 (insert "Content-Type: application/octet-stream\n\n")
391 (goto-char (point-max))
392 (insert (format "--%s--\n" boundary))
393 (goto-char (point-max))))
398 (autoload 'gpg-decrypt "gpg")
399 (autoload 'gpg-verify "gpg")
400 (autoload 'gpg-verify-cleartext "gpg")
401 (autoload 'gpg-sign-detached "gpg")
402 (autoload 'gpg-sign-encrypt "gpg")
403 (autoload 'gpg-encrypt "gpg")
404 (autoload 'gpg-passphrase-read "gpg"))
406 (defun mml2015-gpg-passphrase ()
407 (or (message-options-get 'gpg-passphrase)
408 (message-options-set 'gpg-passphrase (gpg-passphrase-read))))
410 (defun mml2015-gpg-decrypt-1 ()
411 (let ((cipher (current-buffer)) plain result)
412 (if (with-temp-buffer
414 (gpg-decrypt cipher (setq plain (current-buffer))
415 mml2015-result-buffer nil)
416 (mm-set-handle-multipart-parameter
417 mm-security-handle 'gnus-details
418 (with-current-buffer mml2015-result-buffer
422 (insert-buffer-substring plain)
423 (goto-char (point-min))
424 (while (search-forward "\r\n" nil t)
425 (replace-match "\n" t t))))
427 ;; Some wrong with the return value, check plain text buffer.
428 (if (> (point-max) (point-min))
432 (defun mml2015-gpg-decrypt (handle ctl)
433 (let ((mml2015-decrypt-function 'mml2015-gpg-decrypt-1))
434 (mml2015-mailcrypt-decrypt handle ctl)))
436 (defun mml2015-gpg-clear-decrypt ()
438 (setq result (mml2015-gpg-decrypt-1))
440 (mm-set-handle-multipart-parameter
441 mm-security-handle 'gnus-info "OK")
442 (mm-set-handle-multipart-parameter
443 mm-security-handle 'gnus-info "Failed"))))
445 (defun mml2015-gpg-pretty-print-fpr (fingerprint)
447 (fpr-length (string-width fingerprint))
450 (setq fingerprint (string-to-list fingerprint))
452 (setq fpr-length (- fpr-length 4))
453 (setq slice (butlast fingerprint fpr-length))
454 (setq fingerprint (nthcdr 4 fingerprint))
455 (setq n-slice (1+ n-slice))
461 (otherwise (concat " " slice))))))
464 (defun mml2015-gpg-extract-signature-details ()
465 (goto-char (point-min))
466 (let* ((expired (re-search-forward
467 "^\\[GNUPG:\\] SIGEXPIRED$"
469 (signer (and (re-search-forward
470 "^\\[GNUPG:\\] GOODSIG \\([0-9A-Za-z]*\\) \\(.*\\)$"
472 (cons (match-string 1) (match-string 2))))
473 (fprint (and (re-search-forward
474 "^\\[GNUPG:\\] VALIDSIG \\([0-9a-zA-Z]*\\) "
477 (trust (and (re-search-forward
478 "^\\[GNUPG:\\] \\(TRUST_.*\\)$"
482 (cdr (assoc trust mml2015-unabbrev-trust-alist))))
483 (cond ((and signer fprint)
485 (unless trust-good-enough-p
486 (concat "\nUntrusted, Fingerprint: "
487 (mml2015-gpg-pretty-print-fpr fprint)))
489 (format "\nWARNING: Signature from expired key (%s)"
492 "^\\(gpg: \\)?Good signature from \"\\(.*\\)\"$" nil t)
495 "From unknown user"))))
497 (defun mml2015-gpg-verify (handle ctl)
499 (let (part message signature info-is-set-p)
500 (unless (setq part (mm-find-raw-part-by-type
501 ctl (or (mm-handle-multipart-ctl-parameter
503 "application/pgp-signature")
505 (mm-set-handle-multipart-parameter
506 mm-security-handle 'gnus-info "Corrupted")
507 (throw 'error handle))
509 (setq message (current-buffer))
511 ;; Convert <LF> to <CR><LF> in verify mode. Sign and
512 ;; clearsign use --textmode. The conversion is not necessary.
513 ;; In clearverify, the conversion is not necessary either.
514 (goto-char (point-min))
517 (unless (eq (char-before) ?\r)
522 (setq signature (current-buffer))
523 (unless (setq part (mm-find-part-by-type
524 (cdr handle) "application/pgp-signature" nil t))
525 (mm-set-handle-multipart-parameter
526 mm-security-handle 'gnus-info "Corrupted")
527 (throw 'error handle))
528 (mm-insert-part part)
529 (unless (condition-case err
531 (gpg-verify message signature mml2015-result-buffer)
532 (mm-set-handle-multipart-parameter
533 mm-security-handle 'gnus-details
534 (with-current-buffer mml2015-result-buffer
537 (mm-set-handle-multipart-parameter
538 mm-security-handle 'gnus-details (mml2015-format-error err))
539 (mm-set-handle-multipart-parameter
540 mm-security-handle 'gnus-info "Error.")
541 (setq info-is-set-p t)
544 (mm-set-handle-multipart-parameter
545 mm-security-handle 'gnus-details "Quit.")
546 (mm-set-handle-multipart-parameter
547 mm-security-handle 'gnus-info "Quit.")
548 (setq info-is-set-p t)
550 (unless info-is-set-p
551 (mm-set-handle-multipart-parameter
552 mm-security-handle 'gnus-info "Failed"))
553 (throw 'error handle)))
554 (mm-set-handle-multipart-parameter
555 mm-security-handle 'gnus-info
556 (with-current-buffer mml2015-result-buffer
557 (mml2015-gpg-extract-signature-details))))
560 (defun mml2015-gpg-clear-verify ()
561 (if (condition-case err
563 (gpg-verify-cleartext (current-buffer) mml2015-result-buffer)
564 (mm-set-handle-multipart-parameter
565 mm-security-handle 'gnus-details
566 (with-current-buffer mml2015-result-buffer
569 (mm-set-handle-multipart-parameter
570 mm-security-handle 'gnus-details (mml2015-format-error err))
573 (mm-set-handle-multipart-parameter
574 mm-security-handle 'gnus-details "Quit.")
576 (mm-set-handle-multipart-parameter
577 mm-security-handle 'gnus-info
578 (with-current-buffer mml2015-result-buffer
579 (mml2015-gpg-extract-signature-details)))
580 (mm-set-handle-multipart-parameter
581 mm-security-handle 'gnus-info "Failed")))
583 (defun mml2015-gpg-sign (cont)
584 (let ((boundary (mml-compute-boundary cont))
585 (text (current-buffer)) signature)
586 (goto-char (point-max))
590 (unless (gpg-sign-detached text (setq signature (current-buffer))
591 mml2015-result-buffer
593 (message-options-get 'message-sender)
594 t t) ; armor & textmode
595 (unless (> (point-max) (point-min))
596 (pop-to-buffer mml2015-result-buffer)
597 (error "Sign error")))
598 (goto-char (point-min))
599 (while (re-search-forward "\r+$" nil t)
600 (replace-match "" t t))
602 (goto-char (point-min))
603 (insert (format "Content-Type: multipart/signed; boundary=\"%s\";\n"
605 ;;; FIXME: what is the micalg?
606 (insert "\tmicalg=pgp-sha1; protocol=\"application/pgp-signature\"\n")
607 (insert (format "\n--%s\n" boundary))
608 (goto-char (point-max))
609 (insert (format "\n--%s\n" boundary))
610 (insert "Content-Type: application/pgp-signature\n\n")
611 (insert-buffer-substring signature)
612 (goto-char (point-max))
613 (insert (format "--%s--\n" boundary))
614 (goto-char (point-max)))))
616 (defun mml2015-gpg-encrypt (cont &optional sign)
617 (let ((boundary (mml-compute-boundary cont))
618 (text (current-buffer))
620 (mm-with-unibyte-current-buffer
622 ;; set up a function to call the correct gpg encrypt routine
623 ;; with the right arguments. (FIXME: this should be done
625 (flet ((gpg-encrypt-func
626 (sign plaintext ciphertext result recipients &optional
627 passphrase sign-with-key armor textmode)
630 plaintext ciphertext result recipients passphrase
631 sign-with-key armor textmode)
633 plaintext ciphertext result recipients passphrase
635 (unless (gpg-encrypt-func
636 sign ; passed in when using signencrypt
637 text (setq cipher (current-buffer))
638 mml2015-result-buffer
641 (message-options-get 'message-recipients)
642 (message-options-set 'message-recipients
643 (read-string "Recipients: ")))
646 (message-options-get 'message-sender)
647 t t) ; armor & textmode
648 (unless (> (point-max) (point-min))
649 (pop-to-buffer mml2015-result-buffer)
650 (error "Encrypt error"))))
651 (goto-char (point-min))
652 (while (re-search-forward "\r+$" nil t)
653 (replace-match "" t t))
655 (delete-region (point-min) (point-max))
656 (insert (format "Content-Type: multipart/encrypted; boundary=\"%s\";\n"
658 (insert "\tprotocol=\"application/pgp-encrypted\"\n\n")
659 (insert (format "--%s\n" boundary))
660 (insert "Content-Type: application/pgp-encrypted\n\n")
661 (insert "Version: 1\n\n")
662 (insert (format "--%s\n" boundary))
663 (insert "Content-Type: application/octet-stream\n\n")
664 (insert-buffer-substring cipher)
665 (goto-char (point-max))
666 (insert (format "--%s--\n" boundary))
667 (goto-char (point-max))))))
672 (defvar pgg-default-user-id)
673 (defvar pgg-errors-buffer)
674 (defvar pgg-output-buffer))
677 (autoload 'pgg-decrypt-region "pgg")
678 (autoload 'pgg-verify-region "pgg")
679 (autoload 'pgg-sign-region "pgg")
680 (autoload 'pgg-encrypt-region "pgg")
681 (autoload 'pgg-parse-armor "pgg-parse"))
683 (defun mml2015-pgg-decrypt (handle ctl)
685 (let ((pgg-errors-buffer mml2015-result-buffer)
686 child handles result decrypt-status)
687 (unless (setq child (mm-find-part-by-type
689 "application/octet-stream" nil t))
690 (mm-set-handle-multipart-parameter
691 mm-security-handle 'gnus-info "Corrupted")
692 (throw 'error handle))
694 (mm-insert-part child)
695 (if (condition-case err
697 (pgg-decrypt-region (point-min) (point-max))
699 (with-current-buffer mml2015-result-buffer
701 (mm-set-handle-multipart-parameter
702 mm-security-handle 'gnus-details
705 (mm-set-handle-multipart-parameter
706 mm-security-handle 'gnus-details (mml2015-format-error err))
709 (mm-set-handle-multipart-parameter
710 mm-security-handle 'gnus-details "Quit.")
712 (with-current-buffer pgg-output-buffer
713 (goto-char (point-min))
714 (while (search-forward "\r\n" nil t)
715 (replace-match "\n" t t))
716 (setq handles (mm-dissect-buffer t))
717 (mm-destroy-parts handle)
718 (mm-set-handle-multipart-parameter
719 mm-security-handle 'gnus-info "OK")
720 (mm-set-handle-multipart-parameter
721 mm-security-handle 'gnus-details
722 (concat decrypt-status
723 (when (stringp (car handles))
724 "\n" (mm-handle-multipart-ctl-parameter
725 handles 'gnus-details))))
726 (if (listp (car handles))
729 (mm-set-handle-multipart-parameter
730 mm-security-handle 'gnus-info "Failed")
731 (throw 'error handle))))))
733 (defun mml2015-pgg-clear-decrypt ()
734 (let ((pgg-errors-buffer mml2015-result-buffer))
736 (pgg-decrypt-region (point-min) (point-max))
737 (mm-set-handle-multipart-parameter
738 mm-security-handle 'gnus-details
739 (with-current-buffer mml2015-result-buffer
743 ;; Treat data which pgg returns as a unibyte string.
744 (mm-disable-multibyte)
745 (insert-buffer-substring pgg-output-buffer)
746 (goto-char (point-min))
747 (while (search-forward "\r\n" nil t)
748 (replace-match "\n" t t))
749 (mm-set-handle-multipart-parameter
750 mm-security-handle 'gnus-info "OK"))
751 (mm-set-handle-multipart-parameter
752 mm-security-handle 'gnus-info "Failed"))))
754 (defun mml2015-pgg-verify (handle ctl)
755 (let ((pgg-errors-buffer mml2015-result-buffer)
756 signature-file part signature)
757 (if (or (null (setq part (mm-find-raw-part-by-type
758 ctl (or (mm-handle-multipart-ctl-parameter
760 "application/pgp-signature")
762 (null (setq signature (mm-find-part-by-type
763 (cdr handle) "application/pgp-signature" nil t))))
765 (mm-set-handle-multipart-parameter
766 mm-security-handle 'gnus-info "Corrupted")
770 ;; Convert <LF> to <CR><LF> in verify mode. Sign and
771 ;; clearsign use --textmode. The conversion is not necessary.
772 ;; In clearverify, the conversion is not necessary either.
773 (goto-char (point-min))
776 (unless (eq (char-before) ?\r)
780 (with-temp-file (setq signature-file (mm-make-temp-file "pgg"))
781 (mm-insert-part signature))
782 (if (condition-case err
784 (pgg-verify-region (point-min) (point-max)
786 (goto-char (point-min))
787 (while (search-forward "\r\n" nil t)
788 (replace-match "\n" t t))
789 (mm-set-handle-multipart-parameter
790 mm-security-handle 'gnus-details
791 (concat (with-current-buffer pgg-output-buffer
793 (with-current-buffer pgg-errors-buffer
796 (mm-set-handle-multipart-parameter
797 mm-security-handle 'gnus-details (mml2015-format-error err))
800 (mm-set-handle-multipart-parameter
801 mm-security-handle 'gnus-details "Quit.")
804 (delete-file signature-file)
805 (mm-set-handle-multipart-parameter
806 mm-security-handle 'gnus-info
807 (with-current-buffer pgg-errors-buffer
808 (mml2015-gpg-extract-signature-details))))
809 (delete-file signature-file)
810 (mm-set-handle-multipart-parameter
811 mm-security-handle 'gnus-info "Failed")))))
814 (defun mml2015-pgg-clear-verify ()
815 (let ((pgg-errors-buffer mml2015-result-buffer)
816 (text (buffer-string))
817 (coding-system buffer-file-coding-system))
818 (if (condition-case err
820 (mm-with-unibyte-buffer
821 (insert (encode-coding-string text coding-system))
822 (pgg-verify-region (point-min) (point-max) nil t))
823 (goto-char (point-min))
824 (while (search-forward "\r\n" nil t)
825 (replace-match "\n" t t))
826 (mm-set-handle-multipart-parameter
827 mm-security-handle 'gnus-details
828 (concat (with-current-buffer pgg-output-buffer
830 (with-current-buffer pgg-errors-buffer
833 (mm-set-handle-multipart-parameter
834 mm-security-handle 'gnus-details (mml2015-format-error err))
837 (mm-set-handle-multipart-parameter
838 mm-security-handle 'gnus-details "Quit.")
840 (mm-set-handle-multipart-parameter
841 mm-security-handle 'gnus-info
842 (with-current-buffer pgg-errors-buffer
843 (mml2015-gpg-extract-signature-details)))
844 (mm-set-handle-multipart-parameter
845 mm-security-handle 'gnus-info "Failed"))))
847 (defun mml2015-pgg-sign (cont)
848 (let ((pgg-errors-buffer mml2015-result-buffer)
849 (boundary (mml-compute-boundary cont))
850 (pgg-default-user-id (or (message-options-get 'mml-sender)
851 pgg-default-user-id))
854 (unless (pgg-sign-region (point-min) (point-max))
855 (pop-to-buffer mml2015-result-buffer)
856 (error "Sign error"))
857 (goto-char (point-min))
858 (insert (format "Content-Type: multipart/signed; boundary=\"%s\";\n"
860 (if (setq entry (assq 2 (pgg-parse-armor
861 (with-current-buffer pgg-output-buffer
863 (setq entry (assq 'hash-algorithm (cdr entry))))
864 (insert (format "\tmicalg=%s; "
866 (downcase (format "pgp-%s" (cdr entry)))
868 (insert "protocol=\"application/pgp-signature\"\n")
869 (insert (format "\n--%s\n" boundary))
870 (goto-char (point-max))
871 (insert (format "\n--%s\n" boundary))
872 (insert "Content-Type: application/pgp-signature\n\n")
873 (insert-buffer-substring pgg-output-buffer)
874 (goto-char (point-max))
875 (insert (format "--%s--\n" boundary))
876 (goto-char (point-max))))
878 (defun mml2015-pgg-encrypt (cont &optional sign)
879 (let ((pgg-errors-buffer mml2015-result-buffer)
881 (boundary (mml-compute-boundary cont)))
882 (unless (pgg-encrypt-region (point-min) (point-max)
885 (message-options-get 'message-recipients)
886 (message-options-set 'message-recipients
887 (read-string "Recipients: ")))
890 (pop-to-buffer mml2015-result-buffer)
891 (error "Encrypt error"))
892 (delete-region (point-min) (point-max))
893 (goto-char (point-min))
894 (insert (format "Content-Type: multipart/encrypted; boundary=\"%s\";\n"
896 (insert "\tprotocol=\"application/pgp-encrypted\"\n\n")
897 (insert (format "--%s\n" boundary))
898 (insert "Content-Type: application/pgp-encrypted\n\n")
899 (insert "Version: 1\n\n")
900 (insert (format "--%s\n" boundary))
901 (insert "Content-Type: application/octet-stream\n\n")
902 (insert-buffer-substring pgg-output-buffer)
903 (goto-char (point-max))
904 (insert (format "--%s--\n" boundary))
905 (goto-char (point-max))))
910 (autoload 'epg-make-context "epg"))
913 (defvar epg-user-id-alist)
914 (defvar epg-digest-algorithm-alist)
915 (defvar inhibit-redisplay)
916 (autoload 'epg-context-set-armor "epg")
917 (autoload 'epg-context-set-textmode "epg")
918 (autoload 'epg-context-set-signers "epg")
919 (autoload 'epg-context-result-for "epg")
920 (autoload 'epg-new-signature-digest-algorithm "epg")
921 (autoload 'epg-verify-result-to-string "epg")
922 (autoload 'epg-list-keys "epg")
923 (autoload 'epg-decrypt-string "epg")
924 (autoload 'epg-verify-string "epg")
925 (autoload 'epg-sign-string "epg")
926 (autoload 'epg-encrypt-string "epg")
927 (autoload 'epg-passphrase-callback-function "epg")
928 (autoload 'epg-context-set-passphrase-callback "epg"))
931 (defvar password-cache-expiry)
932 (autoload 'password-read "password")
933 (autoload 'password-cache-add "password")
934 (autoload 'password-cache-remove "password"))
936 (defvar mml2015-epg-secret-key-id-list nil)
938 (defun mml2015-epg-passphrase-callback (context key-id ignore)
940 (epg-passphrase-callback-function context key-id nil)
941 (let* ((entry (assoc key-id epg-user-id-alist))
944 (format "GnuPG passphrase for %s: "
952 (let ((password-cache-expiry mml2015-passphrase-cache-expiry))
953 (password-cache-add key-id passphrase))
954 (setq mml2015-epg-secret-key-id-list
955 (cons key-id mml2015-epg-secret-key-id-list))
956 (copy-sequence passphrase)))))
958 (defun mml2015-epg-decrypt (handle ctl)
960 (let ((inhibit-redisplay t)
961 context plain child handles result decrypt-status)
962 (unless (setq child (mm-find-part-by-type
964 "application/octet-stream" nil t))
965 (mm-set-handle-multipart-parameter
966 mm-security-handle 'gnus-info "Corrupted")
967 (throw 'error handle))
968 (setq context (epg-make-context))
969 (if mml2015-cache-passphrase
970 (epg-context-set-passphrase-callback
972 #'mml2015-epg-passphrase-callback))
973 (condition-case error
974 (setq plain (epg-decrypt-string context (mm-get-part child))
975 mml2015-epg-secret-key-id-list nil)
977 (while mml2015-epg-secret-key-id-list
978 (password-cache-remove (car mml2015-epg-secret-key-id-list))
979 (setq mml2015-epg-secret-key-id-list
980 (cdr mml2015-epg-secret-key-id-list)))
981 (mm-set-handle-multipart-parameter
982 mm-security-handle 'gnus-info "Failed")
983 (if (eq (car error) 'quit)
984 (mm-set-handle-multipart-parameter
985 mm-security-handle 'gnus-details "Quit.")
986 (mm-set-handle-multipart-parameter
987 mm-security-handle 'gnus-details (mml2015-format-error error)))
988 (throw 'error handle)))
991 (goto-char (point-min))
992 (while (search-forward "\r\n" nil t)
993 (replace-match "\n" t t))
994 (setq handles (mm-dissect-buffer t))
995 (mm-destroy-parts handle)
996 (if (epg-context-result-for context 'verify)
997 (mm-set-handle-multipart-parameter
998 mm-security-handle 'gnus-info
1000 (epg-verify-result-to-string
1001 (epg-context-result-for context 'verify))))
1002 (mm-set-handle-multipart-parameter
1003 mm-security-handle 'gnus-info "OK"))
1004 (if (stringp (car handles))
1005 (mm-set-handle-multipart-parameter
1006 mm-security-handle 'gnus-details
1007 (mm-handle-multipart-ctl-parameter handles 'gnus-details))))
1008 (if (listp (car handles))
1012 (defun mml2015-epg-clear-decrypt ()
1013 (let ((inhibit-redisplay t)
1014 (context (epg-make-context))
1016 (if mml2015-cache-passphrase
1017 (epg-context-set-passphrase-callback
1019 #'mml2015-epg-passphrase-callback))
1020 (condition-case error
1021 (setq plain (epg-decrypt-string context (buffer-string))
1022 mml2015-epg-secret-key-id-list nil)
1024 (while mml2015-epg-secret-key-id-list
1025 (password-cache-remove (car mml2015-epg-secret-key-id-list))
1026 (setq mml2015-epg-secret-key-id-list
1027 (cdr mml2015-epg-secret-key-id-list)))
1028 (mm-set-handle-multipart-parameter
1029 mm-security-handle 'gnus-info "Failed")
1030 (if (eq (car error) 'quit)
1031 (mm-set-handle-multipart-parameter
1032 mm-security-handle 'gnus-details "Quit.")
1033 (mm-set-handle-multipart-parameter
1034 mm-security-handle 'gnus-details (mml2015-format-error error)))))
1037 ;; Treat data which epg returns as a unibyte string.
1038 (mm-disable-multibyte)
1040 (goto-char (point-min))
1041 (while (search-forward "\r\n" nil t)
1042 (replace-match "\n" t t))
1043 (if (epg-context-result-for context 'verify)
1044 (mm-set-handle-multipart-parameter
1045 mm-security-handle 'gnus-info
1047 (epg-verify-result-to-string
1048 (epg-context-result-for context 'verify))))
1049 (mm-set-handle-multipart-parameter
1050 mm-security-handle 'gnus-info "OK")))))
1052 (defun mml2015-epg-verify (handle ctl)
1054 (let ((inhibit-redisplay t)
1055 context plain signature-file part signature)
1056 (when (or (null (setq part (mm-find-raw-part-by-type
1057 ctl (or (mm-handle-multipart-ctl-parameter
1059 "application/pgp-signature")
1061 (null (setq signature (mm-find-part-by-type
1062 (cdr handle) "application/pgp-signature"
1064 (mm-set-handle-multipart-parameter
1065 mm-security-handle 'gnus-info "Corrupted")
1066 (throw 'error handle))
1067 (setq context (epg-make-context))
1068 (condition-case error
1069 (setq plain (epg-verify-string context (mm-get-part signature) part))
1071 (mm-set-handle-multipart-parameter
1072 mm-security-handle 'gnus-info "Failed")
1073 (if (eq (car error) 'quit)
1074 (mm-set-handle-multipart-parameter
1075 mm-security-handle 'gnus-details "Quit.")
1076 (mm-set-handle-multipart-parameter
1077 mm-security-handle 'gnus-details (mml2015-format-error error)))
1078 (throw 'error handle)))
1079 (mm-set-handle-multipart-parameter
1080 mm-security-handle 'gnus-info
1081 (epg-verify-result-to-string (epg-context-result-for context 'verify)))
1084 (defun mml2015-epg-clear-verify ()
1085 (let ((inhibit-redisplay t)
1086 (context (epg-make-context))
1087 (signature (encode-coding-string (buffer-string)
1088 buffer-file-coding-system))
1090 (condition-case error
1091 (setq plain (epg-verify-string context signature))
1093 (mm-set-handle-multipart-parameter
1094 mm-security-handle 'gnus-info "Failed")
1095 (if (eq (car error) 'quit)
1096 (mm-set-handle-multipart-parameter
1097 mm-security-handle 'gnus-details "Quit.")
1098 (mm-set-handle-multipart-parameter
1099 mm-security-handle 'gnus-details (mml2015-format-error error)))))
1101 (mm-set-handle-multipart-parameter
1102 mm-security-handle 'gnus-info
1103 (epg-verify-result-to-string
1104 (epg-context-result-for context 'verify))))))
1106 (defun mml2015-epg-sign (cont)
1107 (let ((inhibit-redisplay t)
1108 (context (epg-make-context))
1109 (boundary (mml-compute-boundary cont))
1110 signers signature micalg)
1112 (setq signers (epa-select-keys context "Select keys for signing.
1113 If no one is selected, default secret key is used. "
1115 (setq signers (mapcar (lambda (name)
1116 (car (epg-list-keys context name t)))
1118 (list (message-options-get 'mml-sender))))))
1119 (epg-context-set-armor context t)
1120 (epg-context-set-textmode context t)
1121 (epg-context-set-signers context signers)
1122 (if mml2015-cache-passphrase
1123 (epg-context-set-passphrase-callback
1125 #'mml2015-epg-passphrase-callback))
1126 (condition-case error
1127 (setq signature (epg-sign-string context (buffer-string) t)
1128 mml2015-epg-secret-key-id-list nil)
1130 (while mml2015-epg-secret-key-id-list
1131 (password-cache-remove (car mml2015-epg-secret-key-id-list))
1132 (setq mml2015-epg-secret-key-id-list
1133 (cdr mml2015-epg-secret-key-id-list)))
1134 (signal (car error) (cdr error))))
1135 (if (epg-context-result-for context 'sign)
1136 (setq micalg (epg-new-signature-digest-algorithm
1137 (car (epg-context-result-for context 'sign)))))
1138 (goto-char (point-min))
1139 (insert (format "Content-Type: multipart/signed; boundary=\"%s\";\n"
1142 (insert (format "\tmicalg=%s; "
1145 epg-digest-algorithm-alist))))))
1146 (insert "protocol=\"application/pgp-signature\"\n")
1147 (insert (format "\n--%s\n" boundary))
1148 (goto-char (point-max))
1149 (insert (format "\n--%s\n" boundary))
1150 (insert "Content-Type: application/pgp-signature\n\n")
1152 (goto-char (point-max))
1153 (insert (format "--%s--\n" boundary))
1154 (goto-char (point-max))))
1156 (defun mml2015-epg-encrypt (cont &optional sign)
1157 (let ((inhibit-redisplay t)
1158 (context (epg-make-context))
1159 recipients cipher signers
1160 (boundary (mml-compute-boundary cont)))
1163 (epa-select-keys context "Select recipients for encryption.
1164 If no one is selected, symmetric encryption will be performed. "
1165 (if (message-options-get 'message-recipients)
1167 (message-options-get 'message-recipients)
1168 "[ \f\t\n\r\v,]+"))))
1170 (mapcar (lambda (name)
1171 (car (epg-list-keys context name)))
1173 (message-options-get 'message-recipients)
1174 "[ \f\t\n\r\v,]+"))))
1177 (setq signers (epa-select-keys context "Select keys for signing.
1178 If no one is selected, default secret key is used. "
1180 (setq signers (mapcar (lambda (name)
1181 (car (epg-list-keys context name t)))
1183 (list (message-options-get 'mml-sender))))))
1184 (epg-context-set-signers context signers))
1185 (epg-context-set-armor context t)
1186 (epg-context-set-textmode context t)
1187 (if mml2015-cache-passphrase
1188 (epg-context-set-passphrase-callback
1190 #'mml2015-epg-passphrase-callback))
1191 (condition-case error
1193 (epg-encrypt-string context (buffer-string) recipients sign)
1194 mml2015-epg-secret-key-id-list nil)
1196 (while mml2015-epg-secret-key-id-list
1197 (password-cache-remove (car mml2015-epg-secret-key-id-list))
1198 (setq mml2015-epg-secret-key-id-list
1199 (cdr mml2015-epg-secret-key-id-list)))
1200 (signal (car error) (cdr error))))
1201 (delete-region (point-min) (point-max))
1202 (goto-char (point-min))
1203 (insert (format "Content-Type: multipart/encrypted; boundary=\"%s\";\n"
1205 (insert "\tprotocol=\"application/pgp-encrypted\"\n\n")
1206 (insert (format "--%s\n" boundary))
1207 (insert "Content-Type: application/pgp-encrypted\n\n")
1208 (insert "Version: 1\n\n")
1209 (insert (format "--%s\n" boundary))
1210 (insert "Content-Type: application/octet-stream\n\n")
1212 (goto-char (point-max))
1213 (insert (format "--%s--\n" boundary))
1214 (goto-char (point-max))))
1218 (defun mml2015-clean-buffer ()
1219 (if (gnus-buffer-live-p mml2015-result-buffer)
1220 (with-current-buffer mml2015-result-buffer
1223 (setq mml2015-result-buffer
1224 (gnus-get-buffer-create " *MML2015 Result*"))
1227 (defsubst mml2015-clear-decrypt-function ()
1228 (nth 6 (assq mml2015-use mml2015-function-alist)))
1230 (defsubst mml2015-clear-verify-function ()
1231 (nth 5 (assq mml2015-use mml2015-function-alist)))
1234 (defun mml2015-decrypt (handle ctl)
1235 (mml2015-clean-buffer)
1236 (let ((func (nth 4 (assq mml2015-use mml2015-function-alist))))
1238 (funcall func handle ctl)
1242 (defun mml2015-decrypt-test (handle ctl)
1246 (defun mml2015-verify (handle ctl)
1247 (mml2015-clean-buffer)
1248 (let ((func (nth 3 (assq mml2015-use mml2015-function-alist))))
1250 (funcall func handle ctl)
1254 (defun mml2015-verify-test (handle ctl)
1258 (defun mml2015-encrypt (cont &optional sign)
1259 (mml2015-clean-buffer)
1260 (let ((func (nth 2 (assq mml2015-use mml2015-function-alist))))
1262 (funcall func cont sign)
1263 (error "Cannot find encrypt function"))))
1266 (defun mml2015-sign (cont)
1267 (mml2015-clean-buffer)
1268 (let ((func (nth 1 (assq mml2015-use mml2015-function-alist))))
1271 (error "Cannot find sign function"))))
1274 (defun mml2015-self-encrypt ()
1275 (mml2015-encrypt nil))
1279 ;;; arch-tag: b04701d5-0b09-44d8-bed8-de901bf435f2
1280 ;;; mml2015.el ends here