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))
32 "The EasyPG Assistant"
35 (defgroup epa-faces nil
39 (defface epa-validity-high-face
40 '((((class color) (background dark))
41 (:foreground "PaleTurquoise" :bold t))
44 "Face used for displaying the high validity."
46 (defvar epa-validity-high-face 'epa-validity-high-face)
48 (defface epa-validity-medium-face
49 '((((class color) (background dark))
50 (:foreground "PaleTurquoise" :italic t))
53 "Face used for displaying the medium validity."
55 (defvar epa-validity-medium-face 'epa-validity-medium-face)
57 (defface epa-validity-low-face
60 "Face used for displaying the low validity."
62 (defvar epa-validity-low-face 'epa-validity-low-face)
64 (defface epa-validity-disabled-face
66 (:italic t :inverse-video t)))
67 "Face used for displaying the disabled validity."
69 (defvar epa-validity-disabled-face 'epa-validity-disabled-face)
71 (defface epa-string-face
74 (:foreground "lightyellow"))
77 (:foreground "blue4"))
80 "Face used for displaying the string."
82 (defvar epa-string-face 'epa-string-face)
84 (defface epa-mark-face
85 '((((class color) (background dark))
86 (:foreground "orange" :bold t))
88 (:foreground "red" :bold t)))
89 "Face used for displaying the high validity."
91 (defvar epa-mark-face 'epa-mark-face)
93 (defface epa-field-name-face
94 '((((class color) (background dark))
95 (:foreground "PaleTurquoise" :bold t))
97 "Face for the name of the attribute field."
99 (defvar epa-field-name-face 'epa-field-name-face)
101 (defface epa-field-body-face
102 '((((class color) (background dark))
103 (:foreground "turquoise" :italic t))
105 "Face for the body of the attribute field."
107 (defvar epa-field-body-face 'epa-field-body-face)
109 (defcustom epa-validity-face-alist
110 '((unknown . epa-validity-disabled-face)
111 (invalid . epa-validity-disabled-face)
112 (disabled . epa-validity-disabled-face)
113 (revoked . epa-validity-disabled-face)
114 (expired . epa-validity-disabled-face)
115 (none . epa-validity-low-face)
116 (undefined . epa-validity-low-face)
117 (never . epa-validity-low-face)
118 (marginal . epa-validity-medium-face)
119 (full . epa-validity-high-face)
120 (ultimate . epa-validity-high-face))
121 "An alist mapping validity values to faces."
125 (defcustom epa-font-lock-keywords
128 ("^\t\\([^\t:]+:\\)[ \t]*\\(.*\\)$"
129 (1 epa-field-name-face)
130 (2 epa-field-body-face)))
131 "Default expressions to addon in epa-mode."
132 :type '(repeat (list string))
135 (defconst epa-pubkey-algorithm-letter-alist
143 (defvar epa-keys-buffer nil)
144 (defvar epa-key-buffer-alist nil)
146 (defvar epa-list-keys-arguments nil)
148 (defvar epa-keys-mode-map
149 (let ((keymap (make-sparse-keymap)))
150 (define-key keymap "m" 'epa-mark)
151 (define-key keymap "u" 'epa-unmark)
152 (define-key keymap "d" 'epa-decrypt-file)
153 (define-key keymap "v" 'epa-verify-file)
154 (define-key keymap "s" 'epa-sign-file)
155 (define-key keymap "e" 'epa-encrypt-file)
156 (define-key keymap "r" 'epa-delete-key)
157 (define-key keymap "n" 'next-line)
158 (define-key keymap "p" 'previous-line)
159 (define-key keymap " " 'scroll-up)
160 (define-key keymap [delete] 'scroll-down)
161 (define-key keymap "q" 'bury-buffer)
164 (define-widget 'epa-key 'push-button
165 "Button for representing a epg-key object."
167 :button-face-get 'epa-key-widget-button-face-get
168 :value-create 'epa-key-widget-value-create
169 :action 'epa-key-widget-action
170 :help-echo 'epa-key-widget-help-echo)
172 (defun epa-key-widget-action (widget &optional event)
173 (epa-show-key (widget-get widget :value)))
175 (defun epa-key-widget-value-create (widget)
176 (let* ((key (widget-get widget :value))
177 (primary-sub-key (car (epg-key-sub-key-list key)))
178 (primary-user-id (car (epg-key-user-id-list key))))
179 (insert (format "%c "
180 (if (epg-sub-key-validity primary-sub-key)
181 (car (rassq (epg-sub-key-validity primary-sub-key)
182 epg-key-validity-alist))
184 (epg-sub-key-id primary-sub-key)
186 (epg-user-id-name primary-user-id))))
188 (defun epa-key-widget-button-face-get (widget)
189 (let ((validity (epg-sub-key-validity (car (epg-key-sub-key-list
190 (widget-get widget :value))))))
192 (cdr (assq validity epa-validity-face-alist))
195 (defun epa-key-widget-help-echo (widget)
197 (epg-sub-key-id (car (epg-key-sub-key-list
198 (widget-get widget :value))))))
200 (defun epa-keys-mode ()
201 "Major mode for `epa-list-keys'."
202 (kill-all-local-variables)
203 (buffer-disable-undo)
204 (setq major-mode 'epa-keys-mode
208 (use-local-map epa-keys-mode-map)
209 (set-keymap-parent (current-local-map) widget-keymap)
210 (make-local-variable 'font-lock-defaults)
211 (setq font-lock-defaults '(epa-font-lock-keywords t))
212 ;; In XEmacs, auto-initialization of font-lock is not effective
213 ;; if buffer-file-name is not set.
214 (font-lock-set-defaults)
216 (run-hooks 'epa-keys-mode-hook))
218 (defvar epa-key-mode-map
219 (let ((keymap (make-sparse-keymap)))
220 (define-key keymap "q" 'bury-buffer)
223 (defun epa-key-mode ()
224 "Major mode for `epa-show-key'."
225 (kill-all-local-variables)
226 (buffer-disable-undo)
227 (setq major-mode 'epa-key-mode
231 (use-local-map epa-key-mode-map)
232 (make-local-variable 'font-lock-defaults)
233 (setq font-lock-defaults '(epa-font-lock-keywords t))
234 ;; In XEmacs, auto-initialization of font-lock is not effective
235 ;; if buffer-file-name is not set.
236 (font-lock-set-defaults)
237 (run-hooks 'epa-key-mode-hook))
240 (defun epa-list-keys (&optional name mode)
242 (let ((name (read-string "Pattern: ")))
243 (list (if (equal name "") nil name)
244 current-prefix-arg)))
245 (unless (and epa-keys-buffer
246 (buffer-live-p epa-keys-buffer))
247 (setq epa-keys-buffer (generate-new-buffer "*Keys*")))
248 (set-buffer epa-keys-buffer)
249 (let ((inhibit-read-only t)
252 (epa-list-keys-1 name mode)
254 (make-local-variable 'epa-list-keys-arguments)
255 (setq epa-list-keys-arguments (list name mode))
256 (goto-char (point-min))
257 (pop-to-buffer (current-buffer)))
259 (defun epa-list-keys-1 (name mode)
260 (let ((inhibit-read-only t)
262 (keys (epg-list-keys name mode))
267 (put-text-property point (point) 'epa-key (car keys))
268 (widget-create 'epa-key :value (car keys))
270 (setq keys (cdr keys)))))
272 (defun epa-select-keys (prompt &optional names)
274 (unless (and epa-keys-buffer
275 (buffer-live-p epa-keys-buffer))
276 (setq epa-keys-buffer (generate-new-buffer "*Keys*")))
277 (let ((inhibit-read-only t)
280 (set-buffer epa-keys-buffer)
284 :notify (lambda (&rest ignore) (exit-recursive-edit))
286 (substitute-command-keys
287 "Click here or \\[exit-recursive-edit] to finish")
293 (epa-list-keys-1 (car names) nil)
296 (goto-char (point-max))
297 (setq names (cdr names)))
298 (epa-list-keys-1 nil nil))
300 (goto-char (point-min))
301 (pop-to-buffer (current-buffer))
306 (set-buffer epa-keys-buffer)
307 (goto-char (point-min))
309 (while (re-search-forward "^\\*" nil t)
310 (if (setq key (get-text-property (match-beginning 0)
312 (setq keys (cons key keys))))
314 (if (get-buffer-window epa-keys-buffer)
315 (delete-window (get-buffer-window epa-keys-buffer)))
316 (kill-buffer epa-keys-buffer)))))
318 (defun epa-show-key (key)
319 (let* ((primary-sub-key (car (epg-key-sub-key-list key)))
320 (entry (assoc (epg-sub-key-id primary-sub-key)
321 epa-key-buffer-alist))
322 (inhibit-read-only t)
326 (setq entry (cons (epg-sub-key-id primary-sub-key) nil)
327 epa-key-buffer-alist (cons entry epa-key-buffer-alist)))
328 (unless (and (cdr entry)
329 (buffer-live-p (cdr entry)))
330 (setcdr entry (generate-new-buffer
331 (format "*Key*%s" (epg-sub-key-id primary-sub-key)))))
332 (set-buffer (cdr entry))
333 (make-local-variable 'epa-key)
336 (setq pointer (epg-key-user-id-list key))
339 (if (epg-user-id-validity (car pointer))
341 (car (rassq (epg-user-id-validity (car pointer))
342 epg-key-validity-alist)))
345 (epg-user-id-name (car pointer))
347 (setq pointer (cdr pointer)))
348 (setq pointer (epg-key-sub-key-list key))
351 (if (epg-sub-key-validity (car pointer))
353 (car (rassq (epg-sub-key-validity (car pointer))
354 epg-key-validity-alist)))
357 (epg-sub-key-id (car pointer))
360 (epg-sub-key-length (car pointer)))
362 (cdr (assq (epg-sub-key-algorithm (car pointer))
363 epg-pubkey-algorithm-alist))
365 (epg-sub-key-creation-time (car pointer))
366 (if (epg-sub-key-expiration-time (car pointer))
367 (format "\n\tExpires: %s" (epg-sub-key-expiration-time
371 (mapconcat #'symbol-name
372 (epg-sub-key-capability (car pointer))
375 (epg-sub-key-fingerprint (car pointer))
377 (setq pointer (cdr pointer)))
378 (goto-char (point-min))
379 (pop-to-buffer (current-buffer))
382 (defun epa-show-key-notify (widget &rest ignore)
383 (epa-show-key (widget-get widget :value)))
385 (defun epa-mark (&optional arg)
386 "Mark the current line."
388 (let ((inhibit-read-only t)
392 (setq properties (text-properties-at (point)))
394 (insert (if arg " " "*"))
395 (set-text-properties (1- (point)) (point) properties)
398 (defun epa-unmark (&optional arg)
399 "Unmark the current line."
401 (epa-mark (not arg)))
403 (defun epa-decrypt-file (file)
404 (interactive "fFile: ")
405 (let* ((default-name (file-name-sans-extension file))
406 (plain (expand-file-name
408 (concat "To file (default "
409 (file-name-nondirectory default-name)
411 (file-name-directory default-name)
413 (context (epg-make-context)))
414 (message "Decrypting %s..." (file-name-nondirectory file))
415 (epg-decrypt-file context file plain)
416 (message "Decrypting %s...done" (file-name-nondirectory file))))
418 (defun epa-verify-file (file)
419 (interactive "fFile: ")
420 (let* ((context (epg-make-context))
421 (plain (if (equal (file-name-extension file) "sig")
422 (file-name-sans-extension file)))
424 (message "Verifying %s..." (file-name-nondirectory file))
425 (epg-verify-file context file plain)
426 (setq signature (reverse (epg-context-result-for context 'verify)))
427 (with-output-to-temp-buffer "*epa-verify-file*"
428 (set-buffer standard-output)
430 (insert (format "%s: %s %s %s\n"
431 (epg-signature-status (car signature))
432 (epg-signature-key-id (car signature))
433 (epg-signature-user-id (car signature))
434 (epg-signature-validity (car signature))))
435 (setq signature (cdr signature))))
436 (shrink-window-if-larger-than-buffer
437 (get-buffer-window "*epa-verify-file*"))
438 (message "Verifying %s...done" (file-name-nondirectory file))))
440 (defun epa-sign-file (file detached)
442 (list (expand-file-name (read-file-name "File: "))
443 (y-or-n-p "Make a detached signature? ")))
444 (let ((signature (concat file (if detached ".sig" ".gpg")))
445 (context (epg-make-context)))
446 (message "Signing %s..." (file-name-nondirectory file))
447 (epg-sign-file context file signature (not (null detached)))
448 (message "Signing %s...done" (file-name-nondirectory file))))
450 (defun epa-encrypt-file (file recipients)
452 (list (expand-file-name (read-file-name "File: "))
453 (mapcar (lambda (key)
455 (car (epg-key-sub-key-list key))))
456 (epa-select-keys "Select recipents for encryption.
457 If no one is selected, symmetric encryption will be performed. "))))
458 (let ((cipher (concat file ".gpg"))
459 (context (epg-make-context)))
460 (message "Encrypting %s..." (file-name-nondirectory file))
461 (epg-encrypt-file context
465 (message "Encrypting %s...done" (file-name-nondirectory file))))
467 (defun epa-delete-key (key)
472 (get-text-property (point) 'epa-key))))
473 (let ((context (epg-make-context)))
474 (message "Deleting %s..."
475 (epg-sub-key-id (car (epg-key-sub-key-list key))))
476 (epg-delete-key context key)
477 (apply #'epa-list-keys epa-list-keys-arguments)
478 (message "Deleting %s...done"
479 (epg-sub-key-id (car (epg-key-sub-key-list key))))))