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[emacs.git] / lisp / epa.el
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1 ;;; epa.el --- the EasyPG Assistant
2 ;; Copyright (C) 2006, 2007, 2008, 2009, 2010 Free Software Foundation, Inc.
4 ;; Author: Daiki Ueno <ueno@unixuser.org>
5 ;; Keywords: PGP, GnuPG
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 by
11 ;; the Free Software Foundation, either version 3 of the License, or
12 ;; (at your option) any later version.
14 ;; GNU Emacs 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. If not, see <http://www.gnu.org/licenses/>.
22 ;;; Code:
24 (require 'epg)
25 (require 'font-lock)
26 (require 'widget)
27 (eval-when-compile (require 'wid-edit))
28 (require 'derived)
30 (defgroup epa nil
31 "The EasyPG Assistant"
32 :version "23.1"
33 :group 'epg)
35 (defcustom epa-popup-info-window t
36 "If non-nil, status information from epa commands is displayed on
37 the separate window."
38 :type 'boolean
39 :group 'epa)
41 (defcustom epa-info-window-height 5
42 "Number of lines used to display status information."
43 :type 'integer
44 :group 'epa)
46 (defgroup epa-faces nil
47 "Faces for epa-mode."
48 :version "23.1"
49 :group 'epa)
51 (defface epa-validity-high
52 `((((class color) (background dark))
53 (:foreground "PaleTurquoise"
54 ,@(if (assq ':weight custom-face-attributes)
55 '(:weight bold)
56 '(:bold t))))
58 (,@(if (assq ':weight custom-face-attributes)
59 '(:weight bold)
60 '(:bold t)))))
61 "Face used for displaying the high validity."
62 :group 'epa-faces)
64 (defface epa-validity-medium
65 `((((class color) (background dark))
66 (:foreground "PaleTurquoise"
67 ,@(if (assq ':slant custom-face-attributes)
68 '(:slant italic)
69 '(:italic t))))
71 (,@(if (assq ':slant custom-face-attributes)
72 '(:slant italic)
73 '(:italic t)))))
74 "Face used for displaying the medium validity."
75 :group 'epa-faces)
77 (defface epa-validity-low
78 `((t
79 (,@(if (assq ':slant custom-face-attributes)
80 '(:slant italic)
81 '(:italic t)))))
82 "Face used for displaying the low validity."
83 :group 'epa-faces)
85 (defface epa-validity-disabled
86 `((t
87 (,@(if (assq ':slant custom-face-attributes)
88 '(:slant italic)
89 '(:italic t))
90 :inverse-video t)))
91 "Face used for displaying the disabled validity."
92 :group 'epa-faces)
94 (defface epa-string
95 '((((class color) (background dark))
96 (:foreground "lightyellow"))
97 (((class color) (background light))
98 (:foreground "blue4")))
99 "Face used for displaying the string."
100 :group 'epa-faces)
102 (defface epa-mark
103 `((((class color) (background dark))
104 (:foreground "orange"
105 ,@(if (assq ':weight custom-face-attributes)
106 '(:weight bold)
107 '(:bold t))))
108 (((class color) (background light))
109 (:foreground "red"
110 ,@(if (assq ':weight custom-face-attributes)
111 '(:weight bold)
112 '(:bold t))))
114 (,@(if (assq ':weight custom-face-attributes)
115 '(:weight bold)
116 '(:bold t)))))
117 "Face used for displaying the high validity."
118 :group 'epa-faces)
120 (defface epa-field-name
121 `((((class color) (background dark))
122 (:foreground "PaleTurquoise"
123 ,@(if (assq ':weight custom-face-attributes)
124 '(:weight bold)
125 '(:bold t))))
127 (,@(if (assq ':weight custom-face-attributes)
128 '(:weight bold)
129 '(:bold t)))))
130 "Face for the name of the attribute field."
131 :group 'epa)
133 (defface epa-field-body
134 `((((class color) (background dark))
135 (:foreground "turquoise"
136 ,@(if (assq ':slant custom-face-attributes)
137 '(:slant italic)
138 '(:italic t))))
140 (,@(if (assq ':slant custom-face-attributes)
141 '(:slant italic)
142 '(:italic t)))))
143 "Face for the body of the attribute field."
144 :group 'epa)
146 (defcustom epa-validity-face-alist
147 '((unknown . epa-validity-disabled)
148 (invalid . epa-validity-disabled)
149 (disabled . epa-validity-disabled)
150 (revoked . epa-validity-disabled)
151 (expired . epa-validity-disabled)
152 (none . epa-validity-low)
153 (undefined . epa-validity-low)
154 (never . epa-validity-low)
155 (marginal . epa-validity-medium)
156 (full . epa-validity-high)
157 (ultimate . epa-validity-high))
158 "An alist mapping validity values to faces."
159 :type '(repeat (cons symbol face))
160 :group 'epa)
162 (defvar epa-font-lock-keywords
163 '(("^\\*"
164 (0 'epa-mark))
165 ("^\t\\([^\t:]+:\\)[ \t]*\\(.*\\)$"
166 (1 'epa-field-name)
167 (2 'epa-field-body)))
168 "Default expressions to addon in epa-mode.")
170 (defconst epa-pubkey-algorithm-letter-alist
171 '((1 . ?R)
172 (2 . ?r)
173 (3 . ?s)
174 (16 . ?g)
175 (17 . ?D)
176 (20 . ?G)))
178 (defvar epa-protocol 'OpenPGP
179 "*The default protocol.
180 The value can be either OpenPGP or CMS.
182 You should bind this variable with `let', but do not set it globally.")
184 (defvar epa-armor nil
185 "*If non-nil, epa commands create ASCII armored output.
187 You should bind this variable with `let', but do not set it globally.")
189 (defvar epa-textmode nil
190 "*If non-nil, epa commands treat input files as text.
192 You should bind this variable with `let', but do not set it globally.")
194 (defvar epa-keys-buffer nil)
195 (defvar epa-key-buffer-alist nil)
196 (defvar epa-key nil)
197 (defvar epa-list-keys-arguments nil)
198 (defvar epa-info-buffer nil)
199 (defvar epa-last-coding-system-specified nil)
201 (defvar epa-key-list-mode-map
202 (let ((keymap (make-sparse-keymap))
203 (menu-map (make-sparse-keymap)))
204 (define-key keymap "m" 'epa-mark-key)
205 (define-key keymap "u" 'epa-unmark-key)
206 (define-key keymap "d" 'epa-decrypt-file)
207 (define-key keymap "v" 'epa-verify-file)
208 (define-key keymap "s" 'epa-sign-file)
209 (define-key keymap "e" 'epa-encrypt-file)
210 (define-key keymap "r" 'epa-delete-keys)
211 (define-key keymap "i" 'epa-import-keys)
212 (define-key keymap "o" 'epa-export-keys)
213 (define-key keymap "g" 'revert-buffer)
214 (define-key keymap "n" 'next-line)
215 (define-key keymap "p" 'previous-line)
216 (define-key keymap " " 'scroll-up)
217 (define-key keymap [delete] 'scroll-down)
218 (define-key keymap "q" 'epa-exit-buffer)
219 (define-key keymap [menu-bar epa-key-list-mode] (cons "Keys" menu-map))
220 (define-key menu-map [epa-key-list-unmark-key]
221 '(menu-item "Unmark Key" epa-unmark-key
222 :help "Unmark a key"))
223 (define-key menu-map [epa-key-list-mark-key]
224 '(menu-item "Mark Key" epa-mark-key
225 :help "Mark a key"))
226 (define-key menu-map [separator-epa-file] '(menu-item "--"))
227 (define-key menu-map [epa-verify-file]
228 '(menu-item "Verify File..." epa-verify-file
229 :help "Verify FILE"))
230 (define-key menu-map [epa-sign-file]
231 '(menu-item "Sign File..." epa-sign-file
232 :help "Sign FILE by SIGNERS keys selected"))
233 (define-key menu-map [epa-decrypt-file]
234 '(menu-item "Decrypt File..." epa-decrypt-file
235 :help "Decrypt FILE"))
236 (define-key menu-map [epa-encrypt-file]
237 '(menu-item "Encrypt File..." epa-encrypt-file
238 :help "Encrypt FILE for RECIPIENTS"))
239 (define-key menu-map [separator-epa-key-list] '(menu-item "--"))
240 (define-key menu-map [epa-key-list-delete-keys]
241 '(menu-item "Delete keys" epa-delete-keys
242 :help "Delete Marked Keys"))
243 (define-key menu-map [epa-key-list-import-keys]
244 '(menu-item "Import Keys" epa-import-keys
245 :help "Import keys from a file"))
246 (define-key menu-map [epa-key-list-export-keys]
247 '(menu-item "Export Keys" epa-export-keys
248 :help "Export marked keys to a file"))
249 keymap))
251 (defvar epa-key-mode-map
252 (let ((keymap (make-sparse-keymap)))
253 (define-key keymap "q" 'epa-exit-buffer)
254 keymap))
256 (defvar epa-info-mode-map
257 (let ((keymap (make-sparse-keymap)))
258 (define-key keymap "q" 'delete-window)
259 keymap))
261 (defvar epa-exit-buffer-function #'bury-buffer)
263 (define-widget 'epa-key 'push-button
264 "Button for representing a epg-key object."
265 :format "%[%v%]"
266 :button-face-get 'epa--key-widget-button-face-get
267 :value-create 'epa--key-widget-value-create
268 :action 'epa--key-widget-action
269 :help-echo 'epa--key-widget-help-echo)
271 (defun epa--key-widget-action (widget &optional event)
272 (save-selected-window
273 (epa--show-key (widget-get widget :value))))
275 (defun epa--key-widget-value-create (widget)
276 (let* ((key (widget-get widget :value))
277 (primary-sub-key (car (epg-key-sub-key-list key)))
278 (primary-user-id (car (epg-key-user-id-list key))))
279 (insert (format "%c "
280 (if (epg-sub-key-validity primary-sub-key)
281 (car (rassq (epg-sub-key-validity primary-sub-key)
282 epg-key-validity-alist))
283 ? ))
284 (epg-sub-key-id primary-sub-key)
286 (if primary-user-id
287 (if (stringp (epg-user-id-string primary-user-id))
288 (epg-user-id-string primary-user-id)
289 (epg-decode-dn (epg-user-id-string primary-user-id)))
290 ""))))
292 (defun epa--key-widget-button-face-get (widget)
293 (let ((validity (epg-sub-key-validity (car (epg-key-sub-key-list
294 (widget-get widget :value))))))
295 (if validity
296 (cdr (assq validity epa-validity-face-alist))
297 'default)))
299 (defun epa--key-widget-help-echo (widget)
300 (format "Show %s"
301 (epg-sub-key-id (car (epg-key-sub-key-list
302 (widget-get widget :value))))))
304 (eval-and-compile
305 (if (fboundp 'encode-coding-string)
306 (defalias 'epa--encode-coding-string 'encode-coding-string)
307 (defalias 'epa--encode-coding-string 'identity)))
309 (eval-and-compile
310 (if (fboundp 'decode-coding-string)
311 (defalias 'epa--decode-coding-string 'decode-coding-string)
312 (defalias 'epa--decode-coding-string 'identity)))
314 (defun epa-key-list-mode ()
315 "Major mode for `epa-list-keys'."
316 (kill-all-local-variables)
317 (buffer-disable-undo)
318 (setq major-mode 'epa-key-list-mode
319 mode-name "Keys"
320 truncate-lines t
321 buffer-read-only t)
322 (use-local-map epa-key-list-mode-map)
323 (make-local-variable 'font-lock-defaults)
324 (setq font-lock-defaults '(epa-font-lock-keywords t))
325 ;; In XEmacs, auto-initialization of font-lock is not effective
326 ;; if buffer-file-name is not set.
327 (font-lock-set-defaults)
328 (make-local-variable 'epa-exit-buffer-function)
329 (make-local-variable 'revert-buffer-function)
330 (setq revert-buffer-function 'epa--key-list-revert-buffer)
331 (run-mode-hooks 'epa-key-list-mode-hook))
333 (defun epa-key-mode ()
334 "Major mode for a key description."
335 (kill-all-local-variables)
336 (buffer-disable-undo)
337 (setq major-mode 'epa-key-mode
338 mode-name "Key"
339 truncate-lines t
340 buffer-read-only t)
341 (use-local-map epa-key-mode-map)
342 (make-local-variable 'font-lock-defaults)
343 (setq font-lock-defaults '(epa-font-lock-keywords t))
344 ;; In XEmacs, auto-initialization of font-lock is not effective
345 ;; if buffer-file-name is not set.
346 (font-lock-set-defaults)
347 (make-local-variable 'epa-exit-buffer-function)
348 (run-mode-hooks 'epa-key-mode-hook))
350 (defun epa-info-mode ()
351 "Major mode for `epa-info-buffer'."
352 (kill-all-local-variables)
353 (buffer-disable-undo)
354 (setq major-mode 'epa-info-mode
355 mode-name "Info"
356 truncate-lines t
357 buffer-read-only t)
358 (use-local-map epa-info-mode-map)
359 (run-mode-hooks 'epa-info-mode-hook))
361 (defun epa-mark-key (&optional arg)
362 "Mark a key on the current line.
363 If ARG is non-nil, unmark the key."
364 (interactive "P")
365 (let ((inhibit-read-only t)
366 buffer-read-only
367 properties)
368 (beginning-of-line)
369 (unless (get-text-property (point) 'epa-key)
370 (error "No key on this line"))
371 (setq properties (text-properties-at (point)))
372 (delete-char 1)
373 (insert (if arg " " "*"))
374 (set-text-properties (1- (point)) (point) properties)
375 (forward-line)))
377 (defun epa-unmark-key (&optional arg)
378 "Unmark a key on the current line.
379 If ARG is non-nil, mark the key."
380 (interactive "P")
381 (epa-mark-key (not arg)))
383 (defun epa-exit-buffer ()
384 "Exit the current buffer.
385 `epa-exit-buffer-function' is called if it is set."
386 (interactive)
387 (funcall epa-exit-buffer-function))
389 (defun epa--insert-keys (keys)
390 (save-excursion
391 (save-restriction
392 (narrow-to-region (point) (point))
393 (let (point)
394 (while keys
395 (setq point (point))
396 (insert " ")
397 (add-text-properties point (point)
398 (list 'epa-key (car keys)
399 'front-sticky nil
400 'rear-nonsticky t
401 'start-open t
402 'end-open t))
403 (widget-create 'epa-key :value (car keys))
404 (insert "\n")
405 (setq keys (cdr keys))))
406 (add-text-properties (point-min) (point-max)
407 (list 'epa-list-keys t
408 'front-sticky nil
409 'rear-nonsticky t
410 'start-open t
411 'end-open t)))))
413 (defun epa--list-keys (name secret)
414 (unless (and epa-keys-buffer
415 (buffer-live-p epa-keys-buffer))
416 (setq epa-keys-buffer (generate-new-buffer "*Keys*")))
417 (set-buffer epa-keys-buffer)
418 (epa-key-list-mode)
419 (let ((inhibit-read-only t)
420 buffer-read-only
421 (point (point-min))
422 (context (epg-make-context epa-protocol)))
423 (unless (get-text-property point 'epa-list-keys)
424 (setq point (next-single-property-change point 'epa-list-keys)))
425 (when point
426 (delete-region point
427 (or (next-single-property-change point 'epa-list-keys)
428 (point-max)))
429 (goto-char point))
430 (epa--insert-keys (epg-list-keys context name secret))
431 (widget-setup)
432 (set-keymap-parent (current-local-map) widget-keymap))
433 (make-local-variable 'epa-list-keys-arguments)
434 (setq epa-list-keys-arguments (list name secret))
435 (goto-char (point-min))
436 (pop-to-buffer (current-buffer)))
438 ;;;###autoload
439 (defun epa-list-keys (&optional name)
440 "List all keys matched with NAME from the public keyring."
441 (interactive
442 (if current-prefix-arg
443 (let ((name (read-string "Pattern: "
444 (if epa-list-keys-arguments
445 (car epa-list-keys-arguments)))))
446 (list (if (equal name "") nil name)))
447 (list nil)))
448 (epa--list-keys name nil))
450 ;;;###autoload
451 (defun epa-list-secret-keys (&optional name)
452 "List all keys matched with NAME from the private keyring."
453 (interactive
454 (if current-prefix-arg
455 (let ((name (read-string "Pattern: "
456 (if epa-list-keys-arguments
457 (car epa-list-keys-arguments)))))
458 (list (if (equal name "") nil name)))
459 (list nil)))
460 (epa--list-keys name t))
462 (defun epa--key-list-revert-buffer (&optional ignore-auto noconfirm)
463 (apply #'epa--list-keys epa-list-keys-arguments))
465 (defun epa--marked-keys ()
466 (or (with-current-buffer epa-keys-buffer
467 (goto-char (point-min))
468 (let (keys key)
469 (while (re-search-forward "^\\*" nil t)
470 (if (setq key (get-text-property (match-beginning 0)
471 'epa-key))
472 (setq keys (cons key keys))))
473 (nreverse keys)))
474 (save-excursion
475 (beginning-of-line)
476 (let ((key (get-text-property (point) 'epa-key)))
477 (if key
478 (list key))))))
480 (defun epa--select-keys (prompt keys)
481 (unless (and epa-keys-buffer
482 (buffer-live-p epa-keys-buffer))
483 (setq epa-keys-buffer (generate-new-buffer "*Keys*")))
484 (with-current-buffer epa-keys-buffer
485 (epa-key-list-mode)
486 (let ((inhibit-read-only t)
487 buffer-read-only)
488 (erase-buffer)
489 (insert prompt "\n"
490 (substitute-command-keys "\
491 - `\\[epa-mark-key]' to mark a key on the line
492 - `\\[epa-unmark-key]' to unmark a key on the line\n"))
493 (widget-create 'link
494 :notify (lambda (&rest ignore) (abort-recursive-edit))
495 :help-echo
496 (substitute-command-keys
497 "Click here or \\[abort-recursive-edit] to cancel")
498 "Cancel")
499 (widget-create 'link
500 :notify (lambda (&rest ignore) (exit-recursive-edit))
501 :help-echo
502 (substitute-command-keys
503 "Click here or \\[exit-recursive-edit] to finish")
504 "OK")
505 (insert "\n\n")
506 (epa--insert-keys keys)
507 (widget-setup)
508 (set-keymap-parent (current-local-map) widget-keymap)
509 (setq epa-exit-buffer-function #'abort-recursive-edit)
510 (goto-char (point-min))
511 (let ((display-buffer-mark-dedicated 'soft))
512 (pop-to-buffer (current-buffer))))
513 (unwind-protect
514 (progn
515 (recursive-edit)
516 (epa--marked-keys))
517 (kill-buffer epa-keys-buffer))))
519 ;;;###autoload
520 (defun epa-select-keys (context prompt &optional names secret)
521 "Display a user's keyring and ask him to select keys.
522 CONTEXT is an epg-context.
523 PROMPT is a string to prompt with.
524 NAMES is a list of strings to be matched with keys. If it is nil, all
525 the keys are listed.
526 If SECRET is non-nil, list secret keys instead of public keys."
527 (let ((keys (epg-list-keys context names secret)))
528 (epa--select-keys prompt keys)))
530 (defun epa--show-key (key)
531 (let* ((primary-sub-key (car (epg-key-sub-key-list key)))
532 (entry (assoc (epg-sub-key-id primary-sub-key)
533 epa-key-buffer-alist))
534 (inhibit-read-only t)
535 buffer-read-only
536 pointer)
537 (unless entry
538 (setq entry (cons (epg-sub-key-id primary-sub-key) nil)
539 epa-key-buffer-alist (cons entry epa-key-buffer-alist)))
540 (unless (and (cdr entry)
541 (buffer-live-p (cdr entry)))
542 (setcdr entry (generate-new-buffer
543 (format "*Key*%s" (epg-sub-key-id primary-sub-key)))))
544 (set-buffer (cdr entry))
545 (epa-key-mode)
546 (make-local-variable 'epa-key)
547 (setq epa-key key)
548 (erase-buffer)
549 (setq pointer (epg-key-user-id-list key))
550 (while pointer
551 (if (car pointer)
552 (insert " "
553 (if (epg-user-id-validity (car pointer))
554 (char-to-string
555 (car (rassq (epg-user-id-validity (car pointer))
556 epg-key-validity-alist)))
557 " ")
559 (if (stringp (epg-user-id-string (car pointer)))
560 (epg-user-id-string (car pointer))
561 (epg-decode-dn (epg-user-id-string (car pointer))))
562 "\n"))
563 (setq pointer (cdr pointer)))
564 (setq pointer (epg-key-sub-key-list key))
565 (while pointer
566 (insert " "
567 (if (epg-sub-key-validity (car pointer))
568 (char-to-string
569 (car (rassq (epg-sub-key-validity (car pointer))
570 epg-key-validity-alist)))
571 " ")
573 (epg-sub-key-id (car pointer))
575 (format "%dbits"
576 (epg-sub-key-length (car pointer)))
578 (cdr (assq (epg-sub-key-algorithm (car pointer))
579 epg-pubkey-algorithm-alist))
580 "\n\tCreated: "
581 (condition-case nil
582 (format-time-string "%Y-%m-%d"
583 (epg-sub-key-creation-time (car pointer)))
584 (error "????-??-??"))
585 (if (epg-sub-key-expiration-time (car pointer))
586 (format (if (time-less-p (current-time)
587 (epg-sub-key-expiration-time
588 (car pointer)))
589 "\n\tExpires: %s"
590 "\n\tExpired: %s")
591 (condition-case nil
592 (format-time-string "%Y-%m-%d"
593 (epg-sub-key-expiration-time
594 (car pointer)))
595 (error "????-??-??")))
597 "\n\tCapabilities: "
598 (mapconcat #'symbol-name
599 (epg-sub-key-capability (car pointer))
600 " ")
601 "\n\tFingerprint: "
602 (epg-sub-key-fingerprint (car pointer))
603 "\n")
604 (setq pointer (cdr pointer)))
605 (goto-char (point-min))
606 (pop-to-buffer (current-buffer))))
608 (defun epa-display-info (info)
609 (if epa-popup-info-window
610 (save-selected-window
611 (unless (and epa-info-buffer (buffer-live-p epa-info-buffer))
612 (setq epa-info-buffer (generate-new-buffer "*Info*")))
613 (if (get-buffer-window epa-info-buffer)
614 (delete-window (get-buffer-window epa-info-buffer)))
615 (with-current-buffer epa-info-buffer
616 (let ((inhibit-read-only t)
617 buffer-read-only)
618 (erase-buffer)
619 (insert info))
620 (epa-info-mode)
621 (goto-char (point-min)))
622 (if (> (window-height)
623 epa-info-window-height)
624 (set-window-buffer (split-window nil (- (window-height)
625 epa-info-window-height))
626 epa-info-buffer)
627 (pop-to-buffer epa-info-buffer)
628 (if (> (window-height) epa-info-window-height)
629 (shrink-window (- (window-height) epa-info-window-height)))))
630 (message "%s" info)))
632 (defun epa-display-verify-result (verify-result)
633 (epa-display-info (epg-verify-result-to-string verify-result)))
634 (make-obsolete 'epa-display-verify-result 'epa-display-info "23.1")
636 (defun epa-passphrase-callback-function (context key-id handback)
637 (if (eq key-id 'SYM)
638 (read-passwd "Passphrase for symmetric encryption: "
639 (eq (epg-context-operation context) 'encrypt))
640 (read-passwd
641 (if (eq key-id 'PIN)
642 "Passphrase for PIN: "
643 (let ((entry (assoc key-id epg-user-id-alist)))
644 (if entry
645 (format "Passphrase for %s %s: " key-id (cdr entry))
646 (format "Passphrase for %s: " key-id)))))))
648 (defun epa-progress-callback-function (context what char current total
649 handback)
650 (message "%s%d%% (%d/%d)" (or handback
651 (concat what ": "))
652 (if (> total 0) (floor (* (/ current (float total)) 100)) 0)
653 current total))
655 ;;;###autoload
656 (defun epa-decrypt-file (file)
657 "Decrypt FILE."
658 (interactive "fFile: ")
659 (setq file (expand-file-name file))
660 (let* ((default-name (file-name-sans-extension file))
661 (plain (expand-file-name
662 (read-file-name
663 (concat "To file (default "
664 (file-name-nondirectory default-name)
665 ") ")
666 (file-name-directory default-name)
667 default-name)))
668 (context (epg-make-context epa-protocol)))
669 (epg-context-set-passphrase-callback context
670 #'epa-passphrase-callback-function)
671 (epg-context-set-progress-callback context
672 (cons
673 #'epa-progress-callback-function
674 (format "Decrypting %s..."
675 (file-name-nondirectory file))))
676 (message "Decrypting %s..." (file-name-nondirectory file))
677 (epg-decrypt-file context file plain)
678 (message "Decrypting %s...wrote %s" (file-name-nondirectory file)
679 (file-name-nondirectory plain))
680 (if (epg-context-result-for context 'verify)
681 (epa-display-info (epg-verify-result-to-string
682 (epg-context-result-for context 'verify))))))
684 ;;;###autoload
685 (defun epa-verify-file (file)
686 "Verify FILE."
687 (interactive "fFile: ")
688 (setq file (expand-file-name file))
689 (let* ((context (epg-make-context epa-protocol))
690 (plain (if (equal (file-name-extension file) "sig")
691 (file-name-sans-extension file))))
692 (epg-context-set-progress-callback context
693 (cons
694 #'epa-progress-callback-function
695 (format "Verifying %s..."
696 (file-name-nondirectory file))))
697 (message "Verifying %s..." (file-name-nondirectory file))
698 (epg-verify-file context file plain)
699 (message "Verifying %s...done" (file-name-nondirectory file))
700 (if (epg-context-result-for context 'verify)
701 (epa-display-info (epg-verify-result-to-string
702 (epg-context-result-for context 'verify))))))
704 (defun epa--read-signature-type ()
705 (let (type c)
706 (while (null type)
707 (message "Signature type (n,c,d,?) ")
708 (setq c (read-char))
709 (cond ((eq c ?c)
710 (setq type 'clear))
711 ((eq c ?d)
712 (setq type 'detached))
713 ((eq c ??)
714 (with-output-to-temp-buffer "*Help*"
715 (with-current-buffer standard-output
716 (insert "\
717 n - Create a normal signature
718 c - Create a cleartext signature
719 d - Create a detached signature
720 ? - Show this help
721 "))))
723 (setq type 'normal))))
724 type))
726 ;;;###autoload
727 (defun epa-sign-file (file signers mode)
728 "Sign FILE by SIGNERS keys selected."
729 (interactive
730 (let ((verbose current-prefix-arg))
731 (list (expand-file-name (read-file-name "File: "))
732 (if verbose
733 (epa-select-keys (epg-make-context epa-protocol)
734 "Select keys for signing.
735 If no one is selected, default secret key is used. "
736 nil t))
737 (if verbose
738 (epa--read-signature-type)
739 'clear))))
740 (let ((signature (concat file
741 (if (eq epa-protocol 'OpenPGP)
742 (if (or epa-armor
743 (not (memq mode
744 '(nil t normal detached))))
745 ".asc"
746 (if (memq mode '(t detached))
747 ".sig"
748 ".gpg"))
749 (if (memq mode '(t detached))
750 ".p7s"
751 ".p7m"))))
752 (context (epg-make-context epa-protocol)))
753 (epg-context-set-armor context epa-armor)
754 (epg-context-set-textmode context epa-textmode)
755 (epg-context-set-signers context signers)
756 (epg-context-set-passphrase-callback context
757 #'epa-passphrase-callback-function)
758 (epg-context-set-progress-callback context
759 (cons
760 #'epa-progress-callback-function
761 (format "Signing %s..."
762 (file-name-nondirectory file))))
763 (message "Signing %s..." (file-name-nondirectory file))
764 (epg-sign-file context file signature mode)
765 (message "Signing %s...wrote %s" (file-name-nondirectory file)
766 (file-name-nondirectory signature))))
768 ;;;###autoload
769 (defun epa-encrypt-file (file recipients)
770 "Encrypt FILE for RECIPIENTS."
771 (interactive
772 (list (expand-file-name (read-file-name "File: "))
773 (epa-select-keys (epg-make-context epa-protocol)
774 "Select recipients for encryption.
775 If no one is selected, symmetric encryption will be performed. ")))
776 (let ((cipher (concat file (if (eq epa-protocol 'OpenPGP)
777 (if epa-armor ".asc" ".gpg")
778 ".p7m")))
779 (context (epg-make-context epa-protocol)))
780 (epg-context-set-armor context epa-armor)
781 (epg-context-set-textmode context epa-textmode)
782 (epg-context-set-passphrase-callback context
783 #'epa-passphrase-callback-function)
784 (epg-context-set-progress-callback context
785 (cons
786 #'epa-progress-callback-function
787 (format "Encrypting %s..."
788 (file-name-nondirectory file))))
789 (message "Encrypting %s..." (file-name-nondirectory file))
790 (epg-encrypt-file context file recipients cipher)
791 (message "Encrypting %s...wrote %s" (file-name-nondirectory file)
792 (file-name-nondirectory cipher))))
794 ;;;###autoload
795 (defun epa-decrypt-region (start end)
796 "Decrypt the current region between START and END.
798 Don't use this command in Lisp programs!
799 Since this function operates on regions, it does some tricks such
800 as coding-system detection and unibyte/multibyte conversion. If
801 you are sure how the data in the region should be treated, you
802 should consider using the string based counterpart
803 `epg-decrypt-string', or the file based counterpart
804 `epg-decrypt-file' instead.
806 For example:
808 \(let ((context (epg-make-context 'OpenPGP)))
809 (decode-coding-string
810 (epg-decrypt-string context (buffer-substring start end))
811 'utf-8))"
812 (interactive "r")
813 (save-excursion
814 (let ((context (epg-make-context epa-protocol))
815 plain)
816 (epg-context-set-passphrase-callback context
817 #'epa-passphrase-callback-function)
818 (epg-context-set-progress-callback context
819 (cons
820 #'epa-progress-callback-function
821 "Decrypting..."))
822 (message "Decrypting...")
823 (setq plain (epg-decrypt-string context (buffer-substring start end)))
824 (message "Decrypting...done")
825 (setq plain (epa--decode-coding-string
826 plain
827 (or coding-system-for-read
828 (get-text-property start 'epa-coding-system-used)
829 'undecided)))
830 (if (y-or-n-p "Replace the original text? ")
831 (let ((inhibit-read-only t)
832 buffer-read-only)
833 (delete-region start end)
834 (goto-char start)
835 (insert plain))
836 (with-output-to-temp-buffer "*Temp*"
837 (set-buffer standard-output)
838 (insert plain)
839 (epa-info-mode)))
840 (if (epg-context-result-for context 'verify)
841 (epa-display-info (epg-verify-result-to-string
842 (epg-context-result-for context 'verify)))))))
844 (defun epa--find-coding-system-for-mime-charset (mime-charset)
845 (if (featurep 'xemacs)
846 (if (fboundp 'find-coding-system)
847 (find-coding-system mime-charset))
848 (let ((pointer (coding-system-list)))
849 (while (and pointer
850 (eq (coding-system-get (car pointer) 'mime-charset)
851 mime-charset))
852 (setq pointer (cdr pointer)))
853 pointer)))
855 ;;;###autoload
856 (defun epa-decrypt-armor-in-region (start end)
857 "Decrypt OpenPGP armors in the current region between START and END.
859 Don't use this command in Lisp programs!
860 See the reason described in the `epa-decrypt-region' documentation."
861 (interactive "r")
862 (save-excursion
863 (save-restriction
864 (narrow-to-region start end)
865 (goto-char start)
866 (let (armor-start armor-end)
867 (while (re-search-forward "-----BEGIN PGP MESSAGE-----$" nil t)
868 (setq armor-start (match-beginning 0)
869 armor-end (re-search-forward "^-----END PGP MESSAGE-----$"
870 nil t))
871 (unless armor-end
872 (error "No armor tail"))
873 (goto-char armor-start)
874 (let ((coding-system-for-read
875 (or coding-system-for-read
876 (if (re-search-forward "^Charset: \\(.*\\)" armor-end t)
877 (epa--find-coding-system-for-mime-charset
878 (intern (downcase (match-string 1))))))))
879 (goto-char armor-end)
880 (epa-decrypt-region armor-start armor-end)))))))
882 ;;;###autoload
883 (defun epa-verify-region (start end)
884 "Verify the current region between START and END.
886 Don't use this command in Lisp programs!
887 Since this function operates on regions, it does some tricks such
888 as coding-system detection and unibyte/multibyte conversion. If
889 you are sure how the data in the region should be treated, you
890 should consider using the string based counterpart
891 `epg-verify-string', or the file based counterpart
892 `epg-verify-file' instead.
894 For example:
896 \(let ((context (epg-make-context 'OpenPGP)))
897 (decode-coding-string
898 (epg-verify-string context (buffer-substring start end))
899 'utf-8))"
900 (interactive "r")
901 (let ((context (epg-make-context epa-protocol))
902 plain)
903 (epg-context-set-progress-callback context
904 (cons
905 #'epa-progress-callback-function
906 "Verifying..."))
907 (message "Verifying...")
908 (setq plain (epg-verify-string
909 context
910 (epa--encode-coding-string
911 (buffer-substring start end)
912 (or coding-system-for-write
913 (get-text-property start 'epa-coding-system-used)))))
914 (message "Verifying...done")
915 (setq plain (epa--decode-coding-string
916 plain
917 (or coding-system-for-read
918 (get-text-property start 'epa-coding-system-used)
919 'undecided)))
920 (if (y-or-n-p "Replace the original text? ")
921 (let ((inhibit-read-only t)
922 buffer-read-only)
923 (delete-region start end)
924 (goto-char start)
925 (insert plain))
926 (with-output-to-temp-buffer "*Temp*"
927 (set-buffer standard-output)
928 (insert plain)
929 (epa-info-mode)))
930 (if (epg-context-result-for context 'verify)
931 (epa-display-info (epg-verify-result-to-string
932 (epg-context-result-for context 'verify))))))
934 ;;;###autoload
935 (defun epa-verify-cleartext-in-region (start end)
936 "Verify OpenPGP cleartext signed messages in the current region
937 between START and END.
939 Don't use this command in Lisp programs!
940 See the reason described in the `epa-verify-region' documentation."
941 (interactive "r")
942 (save-excursion
943 (save-restriction
944 (narrow-to-region start end)
945 (goto-char start)
946 (let (cleartext-start cleartext-end)
947 (while (re-search-forward "-----BEGIN PGP SIGNED MESSAGE-----$"
948 nil t)
949 (setq cleartext-start (match-beginning 0))
950 (unless (re-search-forward "^-----BEGIN PGP SIGNATURE-----$"
951 nil t)
952 (error "Invalid cleartext signed message"))
953 (setq cleartext-end (re-search-forward
954 "^-----END PGP SIGNATURE-----$"
955 nil t))
956 (unless cleartext-end
957 (error "No cleartext tail"))
958 (epa-verify-region cleartext-start cleartext-end))))))
960 (eval-and-compile
961 (if (fboundp 'select-safe-coding-system)
962 (defalias 'epa--select-safe-coding-system 'select-safe-coding-system)
963 (defun epa--select-safe-coding-system (from to)
964 buffer-file-coding-system)))
966 ;;;###autoload
967 (defun epa-sign-region (start end signers mode)
968 "Sign the current region between START and END by SIGNERS keys selected.
970 Don't use this command in Lisp programs!
971 Since this function operates on regions, it does some tricks such
972 as coding-system detection and unibyte/multibyte conversion. If
973 you are sure how the data should be treated, you should consider
974 using the string based counterpart `epg-sign-string', or the file
975 based counterpart `epg-sign-file' instead.
977 For example:
979 \(let ((context (epg-make-context 'OpenPGP)))
980 (epg-sign-string
981 context
982 (encode-coding-string (buffer-substring start end) 'utf-8)))"
983 (interactive
984 (let ((verbose current-prefix-arg))
985 (setq epa-last-coding-system-specified
986 (or coding-system-for-write
987 (epa--select-safe-coding-system
988 (region-beginning) (region-end))))
989 (list (region-beginning) (region-end)
990 (if verbose
991 (epa-select-keys (epg-make-context epa-protocol)
992 "Select keys for signing.
993 If no one is selected, default secret key is used. "
994 nil t))
995 (if verbose
996 (epa--read-signature-type)
997 'clear))))
998 (save-excursion
999 (let ((context (epg-make-context epa-protocol))
1000 signature)
1001 ;;(epg-context-set-armor context epa-armor)
1002 (epg-context-set-armor context t)
1003 ;;(epg-context-set-textmode context epa-textmode)
1004 (epg-context-set-textmode context t)
1005 (epg-context-set-signers context signers)
1006 (epg-context-set-passphrase-callback context
1007 #'epa-passphrase-callback-function)
1008 (epg-context-set-progress-callback context
1009 (cons
1010 #'epa-progress-callback-function
1011 "Signing..."))
1012 (message "Signing...")
1013 (setq signature (epg-sign-string context
1014 (epa--encode-coding-string
1015 (buffer-substring start end)
1016 epa-last-coding-system-specified)
1017 mode))
1018 (message "Signing...done")
1019 (delete-region start end)
1020 (goto-char start)
1021 (add-text-properties (point)
1022 (progn
1023 (insert (epa--decode-coding-string
1024 signature
1025 (or coding-system-for-read
1026 epa-last-coding-system-specified)))
1027 (point))
1028 (list 'epa-coding-system-used
1029 epa-last-coding-system-specified
1030 'front-sticky nil
1031 'rear-nonsticky t
1032 'start-open t
1033 'end-open t)))))
1035 (eval-and-compile
1036 (if (fboundp 'derived-mode-p)
1037 (defalias 'epa--derived-mode-p 'derived-mode-p)
1038 (defun epa--derived-mode-p (&rest modes)
1039 "Non-nil if the current major mode is derived from one of MODES.
1040 Uses the `derived-mode-parent' property of the symbol to trace backwards."
1041 (let ((parent major-mode))
1042 (while (and (not (memq parent modes))
1043 (setq parent (get parent 'derived-mode-parent))))
1044 parent))))
1046 ;;;###autoload
1047 (defun epa-encrypt-region (start end recipients sign signers)
1048 "Encrypt the current region between START and END for RECIPIENTS.
1050 Don't use this command in Lisp programs!
1051 Since this function operates on regions, it does some tricks such
1052 as coding-system detection and unibyte/multibyte conversion. If
1053 you are sure how the data should be treated, you should consider
1054 using the string based counterpart `epg-encrypt-string', or the
1055 file based counterpart `epg-encrypt-file' instead.
1057 For example:
1059 \(let ((context (epg-make-context 'OpenPGP)))
1060 (epg-encrypt-string
1061 context
1062 (encode-coding-string (buffer-substring start end) 'utf-8)
1063 nil))"
1064 (interactive
1065 (let ((verbose current-prefix-arg)
1066 (context (epg-make-context epa-protocol))
1067 sign)
1068 (setq epa-last-coding-system-specified
1069 (or coding-system-for-write
1070 (epa--select-safe-coding-system
1071 (region-beginning) (region-end))))
1072 (list (region-beginning) (region-end)
1073 (epa-select-keys context
1074 "Select recipients for encryption.
1075 If no one is selected, symmetric encryption will be performed. ")
1076 (setq sign (if verbose (y-or-n-p "Sign? ")))
1077 (if sign
1078 (epa-select-keys context
1079 "Select keys for signing. ")))))
1080 (save-excursion
1081 (let ((context (epg-make-context epa-protocol))
1082 cipher)
1083 ;;(epg-context-set-armor context epa-armor)
1084 (epg-context-set-armor context t)
1085 ;;(epg-context-set-textmode context epa-textmode)
1086 (epg-context-set-textmode context t)
1087 (if sign
1088 (epg-context-set-signers context signers))
1089 (epg-context-set-passphrase-callback context
1090 #'epa-passphrase-callback-function)
1091 (epg-context-set-progress-callback context
1092 (cons
1093 #'epa-progress-callback-function
1094 "Encrypting..."))
1095 (message "Encrypting...")
1096 (setq cipher (epg-encrypt-string context
1097 (epa--encode-coding-string
1098 (buffer-substring start end)
1099 epa-last-coding-system-specified)
1100 recipients
1101 sign))
1102 (message "Encrypting...done")
1103 (delete-region start end)
1104 (goto-char start)
1105 (add-text-properties (point)
1106 (progn
1107 (insert cipher)
1108 (point))
1109 (list 'epa-coding-system-used
1110 epa-last-coding-system-specified
1111 'front-sticky nil
1112 'rear-nonsticky t
1113 'start-open t
1114 'end-open t)))))
1116 ;;;###autoload
1117 (defun epa-delete-keys (keys &optional allow-secret)
1118 "Delete selected KEYS."
1119 (interactive
1120 (let ((keys (epa--marked-keys)))
1121 (unless keys
1122 (error "No keys selected"))
1123 (list keys
1124 (eq (nth 1 epa-list-keys-arguments) t))))
1125 (let ((context (epg-make-context epa-protocol)))
1126 (message "Deleting...")
1127 (epg-delete-keys context keys allow-secret)
1128 (message "Deleting...done")
1129 (apply #'epa--list-keys epa-list-keys-arguments)))
1131 ;;;###autoload
1132 (defun epa-import-keys (file)
1133 "Import keys from FILE."
1134 (interactive "fFile: ")
1135 (setq file (expand-file-name file))
1136 (let ((context (epg-make-context epa-protocol)))
1137 (message "Importing %s..." (file-name-nondirectory file))
1138 (condition-case nil
1139 (progn
1140 (epg-import-keys-from-file context file)
1141 (message "Importing %s...done" (file-name-nondirectory file)))
1142 (error
1143 (message "Importing %s...failed" (file-name-nondirectory file))))
1144 (if (epg-context-result-for context 'import)
1145 (epa-display-info (epg-import-result-to-string
1146 (epg-context-result-for context 'import))))
1147 (if (eq major-mode 'epa-key-list-mode)
1148 (apply #'epa--list-keys epa-list-keys-arguments))))
1150 ;;;###autoload
1151 (defun epa-import-keys-region (start end)
1152 "Import keys from the region."
1153 (interactive "r")
1154 (let ((context (epg-make-context epa-protocol)))
1155 (message "Importing...")
1156 (condition-case nil
1157 (progn
1158 (epg-import-keys-from-string context (buffer-substring start end))
1159 (message "Importing...done"))
1160 (error
1161 (message "Importing...failed")))
1162 (if (epg-context-result-for context 'import)
1163 (epa-display-info (epg-import-result-to-string
1164 (epg-context-result-for context 'import))))))
1166 ;;;###autoload
1167 (defun epa-import-armor-in-region (start end)
1168 "Import keys in the OpenPGP armor format in the current region
1169 between START and END."
1170 (interactive "r")
1171 (save-excursion
1172 (save-restriction
1173 (narrow-to-region start end)
1174 (goto-char start)
1175 (let (armor-start armor-end)
1176 (while (re-search-forward
1177 "-----BEGIN \\(PGP \\(PUBLIC\\|PRIVATE\\) KEY BLOCK\\)-----$"
1178 nil t)
1179 (setq armor-start (match-beginning 0)
1180 armor-end (re-search-forward
1181 (concat "^-----END " (match-string 1) "-----$")
1182 nil t))
1183 (unless armor-end
1184 (error "No armor tail"))
1185 (epa-import-keys-region armor-start armor-end))))))
1187 ;;;###autoload
1188 (defun epa-export-keys (keys file)
1189 "Export selected KEYS to FILE."
1190 (interactive
1191 (let ((keys (epa--marked-keys))
1192 default-name)
1193 (unless keys
1194 (error "No keys selected"))
1195 (setq default-name
1196 (expand-file-name
1197 (concat (epg-sub-key-id (car (epg-key-sub-key-list (car keys))))
1198 (if epa-armor ".asc" ".gpg"))
1199 default-directory))
1200 (list keys
1201 (expand-file-name
1202 (read-file-name
1203 (concat "To file (default "
1204 (file-name-nondirectory default-name)
1205 ") ")
1206 (file-name-directory default-name)
1207 default-name)))))
1208 (let ((context (epg-make-context epa-protocol)))
1209 (epg-context-set-armor context epa-armor)
1210 (message "Exporting to %s..." (file-name-nondirectory file))
1211 (epg-export-keys-to-file context keys file)
1212 (message "Exporting to %s...done" (file-name-nondirectory file))))
1214 ;;;###autoload
1215 (defun epa-insert-keys (keys)
1216 "Insert selected KEYS after the point."
1217 (interactive
1218 (list (epa-select-keys (epg-make-context epa-protocol)
1219 "Select keys to export. ")))
1220 (let ((context (epg-make-context epa-protocol)))
1221 ;;(epg-context-set-armor context epa-armor)
1222 (epg-context-set-armor context t)
1223 (insert (epg-export-keys-to-string context keys))))
1225 ;; (defun epa-sign-keys (keys &optional local)
1226 ;; "Sign selected KEYS.
1227 ;; If a prefix-arg is specified, the signature is marked as non exportable.
1229 ;; Don't use this command in Lisp programs!"
1230 ;; (interactive
1231 ;; (let ((keys (epa--marked-keys)))
1232 ;; (unless keys
1233 ;; (error "No keys selected"))
1234 ;; (list keys current-prefix-arg)))
1235 ;; (let ((context (epg-make-context epa-protocol)))
1236 ;; (epg-context-set-passphrase-callback context
1237 ;; #'epa-passphrase-callback-function)
1238 ;; (epg-context-set-progress-callback context
1239 ;; (cons
1240 ;; #'epa-progress-callback-function
1241 ;; "Signing keys..."))
1242 ;; (message "Signing keys...")
1243 ;; (epg-sign-keys context keys local)
1244 ;; (message "Signing keys...done")))
1245 ;; (make-obsolete 'epa-sign-keys "Do not use.")
1247 (provide 'epa)
1249 ;; arch-tag: 38d20ced-20d5-4137-b17a-f206335423d7
1250 ;;; epa.el ends here