1 ;;; epa.el --- the EasyPG Assistant
2 ;; Copyright (C) 2006 Daiki Ueno
4 ;; Author: Daiki Ueno <ueno@unixuser.org>
5 ;; Keywords: PGP, GnuPG
7 ;; This file is part of EasyPG.
9 ;; This program is free software; you can redistribute it and/or modify
10 ;; it under the terms of the GNU General Public License as published by
11 ;; the Free Software Foundation; either version 2, or (at your option)
14 ;; This program is distributed in the hope that it will be useful,
15 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
16 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 ;; GNU 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., 51 Franklin Street, Fifth Floor,
22 ;; Boston, MA 02110-1301, USA.
29 (eval-when-compile (require 'wid-edit))
33 "The EasyPG Assistant"
36 (defcustom epa-protocol 'OpenPGP
37 "The default protocol."
38 :type '(choice (const :tag "OpenPGP" OpenPGP)
39 (const :tag "CMS" CMS))
42 (defcustom epa-armor nil
43 "If non-nil, epa commands create ASCII armored output."
47 (defcustom epa-textmode nil
48 "If non-nil, epa commands treat input files as text."
52 (defcustom epa-popup-info-window t
53 "If non-nil, status information from epa commands is displayed on
58 (defcustom epa-info-window-height 5
59 "Number of lines used to display status information."
63 (defgroup epa-faces nil
67 (defface epa-validity-high-face
68 '((((class color) (background dark))
69 (:foreground "PaleTurquoise" :bold t))
72 "Face used for displaying the high validity."
74 (defvar epa-validity-high-face 'epa-validity-high-face)
76 (defface epa-validity-medium-face
77 '((((class color) (background dark))
78 (:foreground "PaleTurquoise" :italic t))
81 "Face used for displaying the medium validity."
83 (defvar epa-validity-medium-face 'epa-validity-medium-face)
85 (defface epa-validity-low-face
88 "Face used for displaying the low validity."
90 (defvar epa-validity-low-face 'epa-validity-low-face)
92 (defface epa-validity-disabled-face
94 (:italic t :inverse-video t)))
95 "Face used for displaying the disabled validity."
97 (defvar epa-validity-disabled-face 'epa-validity-disabled-face)
99 (defface epa-string-face
102 (:foreground "lightyellow"))
105 (:foreground "blue4"))
108 "Face used for displaying the string."
110 (defvar epa-string-face 'epa-string-face)
112 (defface epa-mark-face
113 '((((class color) (background dark))
114 (:foreground "orange" :bold t))
116 (:foreground "red" :bold t)))
117 "Face used for displaying the high validity."
119 (defvar epa-mark-face 'epa-mark-face)
121 (defface epa-field-name-face
122 '((((class color) (background dark))
123 (:foreground "PaleTurquoise" :bold t))
125 "Face for the name of the attribute field."
127 (defvar epa-field-name-face 'epa-field-name-face)
129 (defface epa-field-body-face
130 '((((class color) (background dark))
131 (:foreground "turquoise" :italic t))
133 "Face for the body of the attribute field."
135 (defvar epa-field-body-face 'epa-field-body-face)
137 (defcustom epa-validity-face-alist
138 '((unknown . epa-validity-disabled-face)
139 (invalid . epa-validity-disabled-face)
140 (disabled . epa-validity-disabled-face)
141 (revoked . epa-validity-disabled-face)
142 (expired . epa-validity-disabled-face)
143 (none . epa-validity-low-face)
144 (undefined . epa-validity-low-face)
145 (never . epa-validity-low-face)
146 (marginal . epa-validity-medium-face)
147 (full . epa-validity-high-face)
148 (ultimate . epa-validity-high-face))
149 "An alist mapping validity values to faces."
153 (defcustom epa-font-lock-keywords
156 ("^\t\\([^\t:]+:\\)[ \t]*\\(.*\\)$"
157 (1 epa-field-name-face)
158 (2 epa-field-body-face)))
159 "Default expressions to addon in epa-mode."
160 :type '(repeat (list string))
163 (defconst epa-pubkey-algorithm-letter-alist
171 (defvar epa-keys-buffer nil)
172 (defvar epa-key-buffer-alist nil)
174 (defvar epa-list-keys-arguments nil)
175 (defvar epa-info-buffer nil)
176 (defvar epa-last-coding-system-specified nil)
178 (defvar epa-key-list-mode-map
179 (let ((keymap (make-sparse-keymap)))
180 (define-key keymap "m" 'epa-mark)
181 (define-key keymap "u" 'epa-unmark)
182 (define-key keymap "d" 'epa-decrypt-file)
183 (define-key keymap "v" 'epa-verify-file)
184 (define-key keymap "s" 'epa-sign-file)
185 (define-key keymap "e" 'epa-encrypt-file)
186 (define-key keymap "r" 'epa-delete-keys)
187 (define-key keymap "i" 'epa-import-keys)
188 (define-key keymap "o" 'epa-export-keys)
189 (define-key keymap "g" 'epa-list-keys)
190 (define-key keymap "n" 'next-line)
191 (define-key keymap "p" 'previous-line)
192 (define-key keymap " " 'scroll-up)
193 (define-key keymap [delete] 'scroll-down)
194 (define-key keymap "q" 'epa-exit-buffer)
197 (defvar epa-key-mode-map
198 (let ((keymap (make-sparse-keymap)))
199 (define-key keymap "q" 'bury-buffer)
202 (defvar epa-info-mode-map
203 (let ((keymap (make-sparse-keymap)))
204 (define-key keymap "q" 'delete-window)
207 (defvar epa-exit-buffer-function #'bury-buffer)
209 (define-widget 'epa-key 'push-button
210 "Button for representing a epg-key object."
212 :button-face-get 'epa--key-widget-button-face-get
213 :value-create 'epa--key-widget-value-create
214 :action 'epa--key-widget-action
215 :help-echo 'epa--key-widget-help-echo)
217 (defun epa--key-widget-action (widget &optional event)
218 (epa--show-key (widget-get widget :value)))
220 (defun epa--key-widget-value-create (widget)
221 (let* ((key (widget-get widget :value))
222 (primary-sub-key (car (epg-key-sub-key-list key)))
223 (primary-user-id (car (epg-key-user-id-list key))))
224 (insert (format "%c "
225 (if (epg-sub-key-validity primary-sub-key)
226 (car (rassq (epg-sub-key-validity primary-sub-key)
227 epg-key-validity-alist))
229 (epg-sub-key-id primary-sub-key)
232 (if (stringp (epg-user-id-string primary-user-id))
233 (epg-user-id-string primary-user-id)
234 (epg-decode-dn (epg-user-id-string primary-user-id)))
237 (defun epa--key-widget-button-face-get (widget)
238 (let ((validity (epg-sub-key-validity (car (epg-key-sub-key-list
239 (widget-get widget :value))))))
241 (cdr (assq validity epa-validity-face-alist))
244 (defun epa--key-widget-help-echo (widget)
246 (epg-sub-key-id (car (epg-key-sub-key-list
247 (widget-get widget :value))))))
249 (if (fboundp 'encode-coding-string)
250 (defalias 'epa--encode-coding-string 'encode-coding-string)
251 (defalias 'epa--encode-coding-string 'identity))
253 (if (fboundp 'decode-coding-string)
254 (defalias 'epa--decode-coding-string 'decode-coding-string)
255 (defalias 'epa--decode-coding-string 'identity))
257 (defun epa-key-list-mode ()
258 "Major mode for `epa-list-keys'."
259 (kill-all-local-variables)
260 (buffer-disable-undo)
261 (setq major-mode 'epa-key-list-mode
265 (use-local-map epa-key-list-mode-map)
266 (make-local-variable 'font-lock-defaults)
267 (setq font-lock-defaults '(epa-font-lock-keywords t))
268 ;; In XEmacs, auto-initialization of font-lock is not effective
269 ;; if buffer-file-name is not set.
270 (font-lock-set-defaults)
271 (make-local-variable 'epa-exit-buffer-function)
272 (run-hooks 'epa-key-list-mode-hook))
274 (defun epa-key-mode ()
275 "Major mode for a key description."
276 (kill-all-local-variables)
277 (buffer-disable-undo)
278 (setq major-mode 'epa-key-mode
282 (use-local-map epa-key-mode-map)
283 (make-local-variable 'font-lock-defaults)
284 (setq font-lock-defaults '(epa-font-lock-keywords t))
285 ;; In XEmacs, auto-initialization of font-lock is not effective
286 ;; if buffer-file-name is not set.
287 (font-lock-set-defaults)
288 (make-local-variable 'epa-exit-buffer-function)
289 (run-hooks 'epa-key-mode-hook))
291 (defun epa-info-mode ()
292 "Major mode for `epa-info-buffer'."
293 (kill-all-local-variables)
294 (buffer-disable-undo)
295 (setq major-mode 'epa-info-mode
299 (use-local-map epa-info-mode-map)
300 (run-hooks 'epa-info-mode-hook))
302 (defun epa-mark (&optional arg)
303 "Mark the current line.
304 If ARG is non-nil, unmark the current line."
306 (let ((inhibit-read-only t)
310 (setq properties (text-properties-at (point)))
312 (insert (if arg " " "*"))
313 (set-text-properties (1- (point)) (point) properties)
316 (defun epa-unmark (&optional arg)
317 "Unmark the current line.
318 If ARG is non-nil, mark the current line."
320 (epa-mark (not arg)))
322 (defun epa-toggle-mark ()
323 "Toggle the mark the current line."
325 (epa-mark (eq (char-after (save-excursion (beginning-of-line) (point))) ?*)))
327 (defun epa-exit-buffer ()
328 "Exit the current buffer.
329 `epa-exit-buffer-function' is called if it is set."
331 (funcall epa-exit-buffer-function))
333 (defun epa--insert-keys (context name mode)
336 (narrow-to-region (point) (point))
337 (let ((keys (epg-list-keys context name mode))
342 (add-text-properties point (point)
343 (list 'epa-key (car keys)
348 (widget-create 'epa-key :value (car keys))
350 (setq keys (cdr keys))))
351 (add-text-properties (point-min) (point-max)
352 (list 'epa-list-keys t
358 (defun epa--list-keys (name secret)
359 (unless (and epa-keys-buffer
360 (buffer-live-p epa-keys-buffer))
361 (setq epa-keys-buffer (generate-new-buffer "*Keys*")))
362 (set-buffer epa-keys-buffer)
364 (let ((inhibit-read-only t)
367 (context (epg-make-context epa-protocol)))
368 (unless (get-text-property point 'epa-list-keys)
369 (setq point (next-single-property-change point 'epa-list-keys)))
372 (or (next-single-property-change point 'epa-list-keys)
375 (epa--insert-keys context name secret)
377 (set-keymap-parent (current-local-map) widget-keymap))
378 (make-local-variable 'epa-list-keys-arguments)
379 (setq epa-list-keys-arguments (list name secret))
380 (goto-char (point-min))
381 (pop-to-buffer (current-buffer)))
384 (defun epa-list-keys (&optional name)
385 "List all keys matched with NAME from the public keyring."
387 (if current-prefix-arg
388 (let ((name (read-string "Pattern: "
389 (if epa-list-keys-arguments
390 (car epa-list-keys-arguments)))))
391 (list (if (equal name "") nil name)))
392 (or epa-list-keys-arguments (list nil nil))))
393 (epa--list-keys name nil))
396 (defun epa-list-secret-keys (&optional name)
397 "List all keys matched with NAME from the private keyring."
399 (if current-prefix-arg
400 (let ((name (read-string "Pattern: "
401 (if epa-list-keys-arguments
402 (car epa-list-keys-arguments)))))
403 (list (if (equal name "") nil name)))
404 (or epa-list-keys-arguments (list nil nil))))
405 (epa--list-keys name t))
407 (defun epa--marked-keys ()
409 (set-buffer epa-keys-buffer)
410 (goto-char (point-min))
412 (while (re-search-forward "^\\*" nil t)
413 (if (setq key (get-text-property (match-beginning 0)
415 (setq keys (cons key keys))))
419 (let ((key (get-text-property (point) 'epa-key)))
424 (defun epa-select-keys (context prompt &optional names secret)
425 "Display a user's keyring and ask him to select keys.
426 CONTEXT is an epg-context.
427 PROMPT is a string to prompt with.
428 NAMES is a list of strings to be matched with keys. If it is nil, all
430 If SECRET is non-nil, list secret keys instead of public keys."
432 (unless (and epa-keys-buffer
433 (buffer-live-p epa-keys-buffer))
434 (setq epa-keys-buffer (generate-new-buffer "*Keys*")))
435 (set-buffer epa-keys-buffer)
437 (let ((inhibit-read-only t)
441 (substitute-command-keys "\
442 - `\\[epa-mark]' to mark a key on the line
443 - `\\[epa-unmark]' to unmark a key on the line\n"))
445 :notify (lambda (&rest ignore) (abort-recursive-edit))
447 (substitute-command-keys
448 "Click here or \\[abort-recursive-edit] to cancel")
451 :notify (lambda (&rest ignore) (exit-recursive-edit))
453 (substitute-command-keys
454 "Click here or \\[exit-recursive-edit] to finish")
459 (epa--insert-keys context (car names) secret)
460 (if (get-text-property (point) 'epa-list-keys)
462 (goto-char (point-max))
463 (setq names (cdr names)))
466 (epa--insert-keys context nil secret)
467 (if (get-text-property (point) 'epa-list-keys)
469 (epa--insert-keys context nil nil)))
471 (set-keymap-parent (current-local-map) widget-keymap)
472 (setq epa-exit-buffer-function #'abort-recursive-edit)
473 (goto-char (point-min))
474 (pop-to-buffer (current-buffer)))
479 (if (get-buffer-window epa-keys-buffer)
480 (delete-window (get-buffer-window epa-keys-buffer)))
481 (kill-buffer epa-keys-buffer))))
483 (defun epa--format-fingerprint-1 (fingerprint unit-size block-size)
487 (goto-char (point-min))
489 (goto-char (+ (point) unit-size))
491 (setq unit (1+ unit))
492 (insert (if (= (% unit block-size) 0) " " " ")))
495 (defun epa--format-fingerprint (fingerprint)
497 (if (= (length fingerprint) 40)
498 ;; 1234 5678 9ABC DEF0 1234 5678 9ABC DEF0 1234 5678
499 (epa--format-fingerprint-1 fingerprint 4 5)
500 ;; 12 34 56 78 9A BC DE F0 12 34 56 78 9A BC DE F0
501 (epa--format-fingerprint-1 fingerprint 2 8))))
503 (defun epa--show-key (key)
504 (let* ((primary-sub-key (car (epg-key-sub-key-list key)))
505 (entry (assoc (epg-sub-key-id primary-sub-key)
506 epa-key-buffer-alist))
507 (inhibit-read-only t)
511 (setq entry (cons (epg-sub-key-id primary-sub-key) nil)
512 epa-key-buffer-alist (cons entry epa-key-buffer-alist)))
513 (unless (and (cdr entry)
514 (buffer-live-p (cdr entry)))
515 (setcdr entry (generate-new-buffer
516 (format "*Key*%s" (epg-sub-key-id primary-sub-key)))))
517 (set-buffer (cdr entry))
519 (make-local-variable 'epa-key)
522 (setq pointer (epg-key-user-id-list key))
526 (if (epg-user-id-validity (car pointer))
528 (car (rassq (epg-user-id-validity (car pointer))
529 epg-key-validity-alist)))
532 (if (stringp (epg-user-id-string (car pointer)))
533 (epg-user-id-string (car pointer))
534 (epg-decode-dn (epg-user-id-string (car pointer))))
536 (setq pointer (cdr pointer)))
537 (setq pointer (epg-key-sub-key-list key))
540 (if (epg-sub-key-validity (car pointer))
542 (car (rassq (epg-sub-key-validity (car pointer))
543 epg-key-validity-alist)))
546 (epg-sub-key-id (car pointer))
549 (epg-sub-key-length (car pointer)))
551 (cdr (assq (epg-sub-key-algorithm (car pointer))
552 epg-pubkey-algorithm-alist))
554 (format-time-string "%Y-%m-%d"
555 (epg-sub-key-creation-time (car pointer)))
556 (if (epg-sub-key-expiration-time (car pointer))
557 (format "\n\tExpires: %s"
558 (format-time-string "%Y-%m-%d"
559 (epg-sub-key-expiration-time
563 (mapconcat #'symbol-name
564 (epg-sub-key-capability (car pointer))
567 (epa--format-fingerprint (epg-sub-key-fingerprint (car pointer)))
569 (setq pointer (cdr pointer)))
570 (goto-char (point-min))
571 (pop-to-buffer (current-buffer))))
573 (defun epa-display-info (info)
574 (if epa-popup-info-window
575 (save-selected-window
576 (unless (and epa-info-buffer (buffer-live-p epa-info-buffer))
577 (setq epa-info-buffer (generate-new-buffer "*Info*")))
578 (if (get-buffer-window epa-info-buffer)
579 (delete-window (get-buffer-window epa-info-buffer)))
581 (set-buffer epa-info-buffer)
582 (let ((inhibit-read-only t)
587 (goto-char (point-min)))
588 (if (> (window-height)
589 epa-info-window-height)
590 (set-window-buffer (split-window nil (- (window-height)
591 epa-info-window-height))
593 (pop-to-buffer epa-info-buffer)
594 (if (> (window-height) epa-info-window-height)
595 (shrink-window (- (window-height) epa-info-window-height)))))
596 (message "%s" info)))
598 (defun epa-display-verify-result (verify-result)
599 (epa-display-info (epg-verify-result-to-string verify-result)))
600 (make-obsolete 'epa-display-verify-result 'epa-display-info)
602 (defun epa-passphrase-callback-function (context key-id handback)
604 (read-passwd "Passphrase for symmetric encryption: "
605 (eq (epg-context-operation context) 'encrypt))
608 "Passphrase for PIN: "
609 (let ((entry (assoc key-id epg-user-id-alist)))
611 (format "Passphrase for %s %s: " key-id (cdr entry))
612 (format "Passphrase for %s: " key-id)))))))
614 (defun epa-progress-callback-function (context what char current total
616 (message "%s%d%% (%d/%d)" (or handback
618 (if (> total 0) (floor (* (/ current (float total)) 100)) 0)
622 (defun epa-decrypt-file (file)
624 (interactive "fFile: ")
625 (setq file (expand-file-name file))
626 (let* ((default-name (file-name-sans-extension file))
627 (plain (expand-file-name
629 (concat "To file (default "
630 (file-name-nondirectory default-name)
632 (file-name-directory default-name)
634 (context (epg-make-context epa-protocol)))
635 (epg-context-set-passphrase-callback context
636 #'epa-passphrase-callback-function)
637 (epg-context-set-progress-callback context
638 #'epa-progress-callback-function
639 (format "Decrypting %s..."
640 (file-name-nondirectory file)))
641 (message "Decrypting %s..." (file-name-nondirectory file))
642 (epg-decrypt-file context file plain)
643 (message "Decrypting %s...wrote %s" (file-name-nondirectory file)
644 (file-name-nondirectory plain))
645 (if (epg-context-result-for context 'verify)
646 (epa-display-info (epg-verify-result-to-string
647 (epg-context-result-for context 'verify))))))
650 (defun epa-verify-file (file)
652 (interactive "fFile: ")
653 (setq file (expand-file-name file))
654 (let* ((context (epg-make-context epa-protocol))
655 (plain (if (equal (file-name-extension file) "sig")
656 (file-name-sans-extension file))))
657 (epg-context-set-progress-callback context
658 #'epa-progress-callback-function
659 (format "Verifying %s..."
660 (file-name-nondirectory file)))
661 (message "Verifying %s..." (file-name-nondirectory file))
662 (epg-verify-file context file plain)
663 (message "Verifying %s...done" (file-name-nondirectory file))
664 (if (epg-context-result-for context 'verify)
665 (epa-display-info (epg-verify-result-to-string
666 (epg-context-result-for context 'verify))))))
668 (defun epa--read-signature-type ()
671 (message "Signature type (n,c,d,?) ")
676 (setq type 'detached))
678 (with-output-to-temp-buffer "*Help*"
680 (set-buffer standard-output)
682 n - Create a normal signature
683 c - Create a cleartext signature
684 d - Create a detached signature
688 (setq type 'normal))))))
691 (defun epa-sign-file (file signers mode)
692 "Sign FILE by SIGNERS keys selected."
694 (let ((verbose current-prefix-arg))
695 (list (expand-file-name (read-file-name "File: "))
697 (epa-select-keys (epg-make-context epa-protocol)
698 "Select keys for signing.
699 If no one is selected, default secret key is used. "
702 (epa--read-signature-type)
704 (let ((signature (concat file
705 (if (eq epa-protocol 'OpenPGP)
708 '(nil t normal detached))))
710 (if (memq mode '(t detached))
713 (if (memq mode '(t detached))
716 (context (epg-make-context epa-protocol)))
717 (epg-context-set-armor context epa-armor)
718 (epg-context-set-textmode context epa-textmode)
719 (epg-context-set-signers context signers)
720 (epg-context-set-passphrase-callback context
721 #'epa-passphrase-callback-function)
722 (epg-context-set-progress-callback context
723 #'epa-progress-callback-function
724 (format "Signing %s..."
725 (file-name-nondirectory file)))
726 (message "Signing %s..." (file-name-nondirectory file))
727 (epg-sign-file context file signature mode)
728 (message "Signing %s...wrote %s" (file-name-nondirectory file)
729 (file-name-nondirectory signature))))
732 (defun epa-encrypt-file (file recipients)
733 "Encrypt FILE for RECIPIENTS."
735 (list (expand-file-name (read-file-name "File: "))
736 (epa-select-keys (epg-make-context epa-protocol)
737 "Select recipients for encryption.
738 If no one is selected, symmetric encryption will be performed. ")))
739 (let ((cipher (concat file (if (eq epa-protocol 'OpenPGP)
740 (if epa-armor ".asc" ".gpg")
742 (context (epg-make-context epa-protocol)))
743 (epg-context-set-armor context epa-armor)
744 (epg-context-set-textmode context epa-textmode)
745 (epg-context-set-passphrase-callback context
746 #'epa-passphrase-callback-function)
747 (epg-context-set-progress-callback context
748 #'epa-progress-callback-function
749 (format "Encrypting %s..."
750 (file-name-nondirectory file)))
751 (message "Encrypting %s..." (file-name-nondirectory file))
752 (epg-encrypt-file context file recipients cipher)
753 (message "Encrypting %s...wrote %s" (file-name-nondirectory file)
754 (file-name-nondirectory cipher))))
757 (defun epa-decrypt-region (start end)
758 "Decrypt the current region between START and END.
760 Don't use this command in Lisp programs!"
763 (let ((context (epg-make-context epa-protocol))
765 (epg-context-set-passphrase-callback context
766 #'epa-passphrase-callback-function)
767 (epg-context-set-progress-callback context
768 #'epa-progress-callback-function
770 (message "Decrypting...")
771 (setq plain (epg-decrypt-string context (buffer-substring start end)))
772 (message "Decrypting...done")
773 (setq plain (epa--decode-coding-string
775 (or coding-system-for-read
776 (get-text-property start 'epa-coding-system-used))))
777 (if (y-or-n-p "Replace the original text? ")
778 (let ((inhibit-read-only t)
780 (delete-region start end)
783 (with-output-to-temp-buffer "*Temp*"
784 (set-buffer standard-output)
787 (if (epg-context-result-for context 'verify)
788 (epa-display-info (epg-verify-result-to-string
789 (epg-context-result-for context 'verify)))))))
791 (defun epa--find-coding-system-for-mime-charset (mime-charset)
792 (if (featurep 'xemacs)
793 (if (fboundp 'find-coding-system)
794 (find-coding-system mime-charset))
795 (let ((pointer (coding-system-list)))
797 (eq (coding-system-get (car pointer) 'mime-charset)
799 (setq pointer (cdr pointer)))
803 (defun epa-decrypt-armor-in-region (start end)
804 "Decrypt OpenPGP armors in the current region between START and END.
806 Don't use this command in Lisp programs!"
810 (narrow-to-region start end)
812 (let (armor-start armor-end)
813 (while (re-search-forward "-----BEGIN PGP MESSAGE-----$" nil t)
814 (setq armor-start (match-beginning 0)
815 armor-end (re-search-forward "^-----END PGP MESSAGE-----$"
818 (error "No armor tail"))
819 (goto-char armor-start)
820 (let ((coding-system-for-read
821 (or coding-system-for-read
822 (if (re-search-forward "^Charset: \\(.*\\)" armor-end t)
823 (epa--find-coding-system-for-mime-charset
824 (intern (downcase (match-string 1))))))))
825 (goto-char armor-end)
826 (epa-decrypt-region armor-start armor-end)))))))
829 (defun epa-verify-region (start end)
830 "Verify the current region between START and END.
832 Don't use this command in Lisp programs!"
834 (let ((context (epg-make-context epa-protocol))
836 (epg-context-set-progress-callback context
837 #'epa-progress-callback-function
839 (setq plain (epg-verify-string
841 (epa--encode-coding-string
842 (buffer-substring start end)
843 (or coding-system-for-write
844 (get-text-property start
845 'epa-coding-system-used)))))
846 (if (y-or-n-p "Replace the original text? ")
847 (let ((inhibit-read-only t)
849 (delete-region start end)
852 (with-output-to-temp-buffer "*Temp*"
853 (set-buffer standard-output)
856 (if (epg-context-result-for context 'verify)
857 (epa-display-info (epg-verify-result-to-string
858 (epg-context-result-for context 'verify))))))
861 (defun epa-verify-cleartext-in-region (start end)
862 "Verify OpenPGP cleartext signed messages in the current region
863 between START and END.
865 Don't use this command in Lisp programs!"
869 (narrow-to-region start end)
871 (let (cleartext-start cleartext-end)
872 (while (re-search-forward "-----BEGIN PGP SIGNED MESSAGE-----$"
874 (setq cleartext-start (match-beginning 0))
875 (unless (re-search-forward "^-----BEGIN PGP SIGNATURE-----$"
877 (error "Invalid cleartext signed message"))
878 (setq cleartext-end (re-search-forward
879 "^-----END PGP SIGNATURE-----$"
881 (unless cleartext-end
882 (error "No cleartext tail"))
883 (epa-verify-region cleartext-start cleartext-end))))))
885 (if (fboundp 'select-safe-coding-system)
886 (defalias 'epa--select-safe-coding-system 'select-safe-coding-system)
887 (defun epa--select-safe-coding-system (from to)
888 buffer-file-coding-system))
891 (defun epa-sign-region (start end signers mode)
892 "Sign the current region between START and END by SIGNERS keys selected.
894 Don't use this command in Lisp programs!"
896 (let ((verbose current-prefix-arg))
897 (setq epa-last-coding-system-specified
898 (or coding-system-for-write
899 (epa--select-safe-coding-system
900 (region-beginning) (region-end))))
901 (list (region-beginning) (region-end)
903 (epa-select-keys (epg-make-context epa-protocol)
904 "Select keys for signing.
905 If no one is selected, default secret key is used. "
908 (epa--read-signature-type)
911 (let ((context (epg-make-context epa-protocol))
913 ;;(epg-context-set-armor context epa-armor)
914 (epg-context-set-armor context t)
915 ;;(epg-context-set-textmode context epa-textmode)
916 (epg-context-set-textmode context t)
917 (epg-context-set-signers context signers)
918 (epg-context-set-passphrase-callback context
919 #'epa-passphrase-callback-function)
920 (epg-context-set-progress-callback context
921 #'epa-progress-callback-function
923 (message "Signing...")
924 (setq signature (epg-sign-string context
925 (epa--encode-coding-string
926 (buffer-substring start end)
927 epa-last-coding-system-specified)
929 (message "Signing...done")
930 (delete-region start end)
932 (add-text-properties (point)
934 (insert (epa--decode-coding-string
936 (or coding-system-for-read
937 epa-last-coding-system-specified)))
939 (list 'epa-coding-system-used
940 epa-last-coding-system-specified
946 (if (fboundp 'derived-mode-p)
947 (defalias 'epa--derived-mode-p 'derived-mode-p)
948 (defun epa--derived-mode-p (&rest modes)
949 "Non-nil if the current major mode is derived from one of MODES.
950 Uses the `derived-mode-parent' property of the symbol to trace backwards."
951 (let ((parent major-mode))
952 (while (and (not (memq parent modes))
953 (setq parent (get parent 'derived-mode-parent))))
957 (defun epa-encrypt-region (start end recipients sign signers)
958 "Encrypt the current region between START and END for RECIPIENTS.
960 Don't use this command in Lisp programs!"
962 (let ((verbose current-prefix-arg)
963 (context (epg-make-context epa-protocol))
965 (setq epa-last-coding-system-specified
966 (or coding-system-for-write
967 (epa--select-safe-coding-system
968 (region-beginning) (region-end))))
969 (list (region-beginning) (region-end)
970 (epa-select-keys context
971 "Select recipients for encryption.
972 If no one is selected, symmetric encryption will be performed. ")
973 (setq sign (if verbose (y-or-n-p "Sign? ")))
975 (epa-select-keys context
976 "Select keys for signing. ")))))
978 (let ((context (epg-make-context epa-protocol))
980 ;;(epg-context-set-armor context epa-armor)
981 (epg-context-set-armor context t)
982 ;;(epg-context-set-textmode context epa-textmode)
983 (epg-context-set-textmode context t)
985 (epg-context-set-signers context signers))
986 (epg-context-set-passphrase-callback context
987 #'epa-passphrase-callback-function)
988 (epg-context-set-progress-callback context
989 #'epa-progress-callback-function
991 (message "Encrypting...")
992 (setq cipher (epg-encrypt-string context
993 (epa--encode-coding-string
994 (buffer-substring start end)
995 epa-last-coding-system-specified)
998 (message "Encrypting...done")
999 (delete-region start end)
1001 (add-text-properties (point)
1005 (list 'epa-coding-system-used
1006 epa-last-coding-system-specified
1013 (defun epa-delete-keys (keys &optional allow-secret)
1014 "Delete selected KEYS.
1016 Don't use this command in Lisp programs!"
1018 (let ((keys (epa--marked-keys)))
1020 (error "No keys selected"))
1022 (eq (nth 1 epa-list-keys-arguments) t))))
1023 (let ((context (epg-make-context epa-protocol)))
1024 (message "Deleting...")
1025 (epg-delete-keys context keys allow-secret)
1026 (message "Deleting...done")
1027 (apply #'epa-list-keys epa-list-keys-arguments)))
1030 (defun epa-import-keys (file)
1031 "Import keys from FILE.
1033 Don't use this command in Lisp programs!"
1034 (interactive "fFile: ")
1035 (setq file (expand-file-name file))
1036 (let ((context (epg-make-context epa-protocol)))
1037 (message "Importing %s..." (file-name-nondirectory file))
1040 (epg-import-keys-from-file context file)
1041 (message "Importing %s...done" (file-name-nondirectory file)))
1043 (message "Importing %s...failed" (file-name-nondirectory file))))
1044 (if (epg-context-result-for context 'import)
1045 (epa-display-info (epg-import-result-to-string
1046 (epg-context-result-for context 'import))))
1047 (if (eq major-mode 'epa-key-list-mode)
1048 (apply #'epa-list-keys epa-list-keys-arguments))))
1051 (defun epa-import-keys-region (start end)
1052 "Import keys from the region.
1054 Don't use this command in Lisp programs!"
1056 (let ((context (epg-make-context epa-protocol)))
1057 (message "Importing...")
1060 (epg-import-keys-from-string context (buffer-substring start end))
1061 (message "Importing...done"))
1063 (message "Importing...failed")))
1064 (if (epg-context-result-for context 'import)
1065 (epa-display-info (epg-import-result-to-string
1066 (epg-context-result-for context 'import))))))
1069 (defun epa-import-armor-in-region (start end)
1070 "Import keys in the OpenPGP armor format in the current region
1071 between START and END.
1073 Don't use this command in Lisp programs!"
1077 (narrow-to-region start end)
1079 (let (armor-start armor-end)
1080 (while (re-search-forward
1081 "-----BEGIN \\(PGP \\(PUBLIC\\|PRIVATE\\) KEY BLOCK\\)-----$"
1083 (setq armor-start (match-beginning 0)
1084 armor-end (re-search-forward
1085 (concat "^-----END " (match-string 1) "-----$")
1088 (error "No armor tail"))
1089 (epa-import-keys-region armor-start armor-end))))))
1092 (defun epa-export-keys (keys file)
1093 "Export selected KEYS to FILE.
1095 Don't use this command in Lisp programs!"
1097 (let ((keys (epa--marked-keys))
1100 (error "No keys selected"))
1103 (concat (epg-sub-key-id (car (epg-key-sub-key-list (car keys))))
1104 (if epa-armor ".asc" ".gpg"))
1109 (concat "To file (default "
1110 (file-name-nondirectory default-name)
1112 (file-name-directory default-name)
1114 (let ((context (epg-make-context epa-protocol)))
1115 (epg-context-set-armor context epa-armor)
1116 (message "Exporting to %s..." (file-name-nondirectory file))
1117 (epg-export-keys-to-file context keys file)
1118 (message "Exporting to %s...done" (file-name-nondirectory file))))
1121 (defun epa-insert-keys (keys)
1122 "Insert selected KEYS after the point.
1124 Don't use this command in Lisp programs!"
1126 (list (epa-select-keys (epg-make-context epa-protocol)
1127 "Select keys to export. ")))
1128 (let ((context (epg-make-context epa-protocol)))
1129 ;;(epg-context-set-armor context epa-armor)
1130 (epg-context-set-armor context t)
1131 (insert (epg-export-keys-to-string context keys))))
1134 (defun epa-sign-keys (keys &optional local)
1135 "Sign selected KEYS.
1136 If a prefix-arg is specified, the signature is marked as non exportable.
1138 Don't use this command in Lisp programs!"
1140 (let ((keys (epa--marked-keys)))
1142 (error "No keys selected"))
1143 (list keys current-prefix-arg)))
1144 (let ((context (epg-make-context epa-protocol)))
1145 (epg-context-set-passphrase-callback context
1146 #'epa-passphrase-callback-function)
1147 (epg-context-set-progress-callback context
1148 #'epa-progress-callback-function
1150 (message "Signing keys...")
1151 (epg-sign-keys context keys local)
1152 (message "Signing keys...done")))
1153 (make-obsolete 'epa-sign-keys "Do not use.")
1157 ;;; epa.el ends here