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-field-name-face
85 '((((class color) (background dark))
86 (:foreground "PaleTurquoise" :bold t))
88 "Face for the name of the attribute field."
90 (defvar epa-field-name-face 'epa-field-name-face)
92 (defface epa-field-body-face
93 '((((class color) (background dark))
94 (:foreground "turquoise" :italic t))
96 "Face for the body of the attribute field."
98 (defvar epa-field-body-face 'epa-field-body-face)
100 (defcustom epa-validity-face-alist
101 '((?o . epa-validity-disabled-face)
102 (?i . epa-validity-disabled-face)
103 (?d . epa-validity-disabled-face)
104 (?r . epa-validity-disabled-face)
105 (?e . epa-validity-disabled-face)
106 (?- . epa-validity-low-face)
107 (?q . epa-validity-low-face)
108 (?n . epa-validity-low-face)
109 (?m . epa-validity-medium-face)
110 (?f . epa-validity-high-face)
111 (?u . epa-validity-high-face))
112 "An alist mapping marks on epa-keys-buffer to faces."
116 (defcustom epa-font-lock-keywords
117 '(("^[* ]\\(\\([oidreqnmfu-]\\) .*\\)"
118 (1 (cdr (assq (aref (match-string 2) 0)
119 epa-validity-face-alist))))
120 ("^\t\\([^\t:]+:\\)[ \t]*\\(.*\\)$"
121 (1 epa-field-name-face)
122 (2 epa-field-body-face)))
123 "Default expressions to addon in epa-mode."
124 :type '(repeat (list string))
127 (defconst epa-pubkey-algorithm-letter-alist
135 (defvar epa-keys-buffer nil)
136 (defvar epa-key-buffer-alist nil)
139 (defvar epa-keys-mode-map
140 (let ((keymap (make-sparse-keymap)))
141 (define-key keymap "m" 'epa-mark)
142 (define-key keymap "u" 'epa-unmark)
143 (define-key keymap "d" 'epa-decrypt-file)
144 (define-key keymap "v" 'epa-verify-file)
145 (define-key keymap "s" 'epa-sign-file)
146 (define-key keymap "e" 'epa-encrypt-file)
147 (define-key keymap "n" 'next-line)
148 (define-key keymap "p" 'previous-line)
149 (define-key keymap " " 'scroll-up)
150 (define-key keymap [delete] 'scroll-down)
151 (define-key keymap "q" 'bury-buffer)
154 (defun epa-keys-mode ()
155 "Major mode for `epa-list-keys'."
156 (kill-all-local-variables)
157 (buffer-disable-undo)
158 (setq major-mode 'epa-keys-mode
162 (use-local-map epa-keys-mode-map)
163 (set-keymap-parent (current-local-map) widget-keymap)
164 (make-local-variable 'font-lock-defaults)
165 (setq font-lock-defaults '(epa-font-lock-keywords t))
166 ;; In XEmacs, auto-initialization of font-lock is not effective
167 ;; if buffer-file-name is not set.
168 (font-lock-set-defaults)
170 (run-hooks 'epa-keys-mode-hook))
172 (defvar epa-key-mode-map
173 (let ((keymap (make-sparse-keymap)))
174 (define-key keymap "q" 'bury-buffer)
177 (defun epa-key-mode ()
178 "Major mode for `epa-show-key'."
179 (kill-all-local-variables)
180 (buffer-disable-undo)
181 (setq major-mode 'epa-key-mode
185 (use-local-map epa-key-mode-map)
186 (make-local-variable 'font-lock-defaults)
187 (setq font-lock-defaults '(epa-font-lock-keywords t))
188 ;; In XEmacs, auto-initialization of font-lock is not effective
189 ;; if buffer-file-name is not set.
190 (font-lock-set-defaults)
191 (run-hooks 'epa-key-mode-hook))
194 (defun epa-list-keys (&optional name)
195 (interactive "sPattern: ")
196 (unless (and epa-keys-buffer
197 (buffer-live-p epa-keys-buffer))
198 (setq epa-keys-buffer (generate-new-buffer "*Keys*")))
199 (set-buffer epa-keys-buffer)
201 (epa-list-keys-1 name)
203 (goto-char (point-min))
204 (pop-to-buffer (current-buffer)))
206 (defun epa-list-keys-1 (name)
207 (let ((inhibit-read-only t)
209 keys point primary-sub-key primary-user-id)
210 (setq keys (epg-list-keys name))
213 primary-sub-key (car (epg-key-sub-key-list (car keys)))
214 primary-user-id (car (epg-key-user-id-list (car keys))))
215 (insert " " (or (char-to-string
216 (car (rassq (epg-sub-key-validity primary-sub-key)
217 epg-key-validity-alist)))
220 :tag (epg-sub-key-id primary-sub-key)
221 :notify 'epa-show-key-notify
223 (format "Show key %s"
224 (epg-sub-key-id primary-sub-key))
226 (insert " " (epg-user-id-name primary-user-id) "\n")
227 (put-text-property point (point) 'epa-key (car keys))
228 (setq keys (cdr keys)))))
230 (defun epa-select-keys (prompt &optional names)
232 (unless (and epa-keys-buffer
233 (buffer-live-p epa-keys-buffer))
234 (setq epa-keys-buffer (generate-new-buffer "*Keys*")))
235 (let ((inhibit-read-only t)
238 (set-buffer epa-keys-buffer)
242 :notify (lambda (&rest ignore) (exit-recursive-edit))
244 (substitute-command-keys
245 "Click here or \\[exit-recursive-edit] to finish")
251 (epa-list-keys-1 (car names))
254 (goto-char (point-max))
255 (setq names (cdr names)))
256 (epa-list-keys-1 nil))
258 (goto-char (point-min))
259 (pop-to-buffer (current-buffer))
264 (set-buffer epa-keys-buffer)
265 (goto-char (point-min))
267 (while (re-search-forward "^\\*" nil t)
268 (if (setq key (get-text-property (match-beginning 0)
270 (setq keys (cons key keys))))
272 (if (get-buffer-window epa-keys-buffer)
273 (delete-window (get-buffer-window epa-keys-buffer)))
274 (kill-buffer epa-keys-buffer)))))
276 (defun epa-show-key (key)
277 (let* ((primary-sub-key (car (epg-key-sub-key-list key)))
278 (entry (assoc (epg-sub-key-id primary-sub-key)
279 epa-key-buffer-alist))
280 (inhibit-read-only t)
284 (setq entry (cons (epg-sub-key-id primary-sub-key) nil)
285 epa-key-buffer-alist (cons entry epa-key-buffer-alist)))
286 (unless (and (cdr entry)
287 (buffer-live-p (cdr entry)))
288 (setcdr entry (generate-new-buffer
289 (format "*Key*%s" (epg-sub-key-id primary-sub-key)))))
290 (set-buffer (cdr entry))
291 (make-local-variable 'epa-key)
294 (setq pointer (epg-key-user-id-list key))
298 (car (rassq (epg-user-id-validity (car pointer))
299 epg-key-validity-alist)))
301 (epg-user-id-name (car pointer))
303 (setq pointer (cdr pointer)))
304 (setq pointer (epg-key-sub-key-list key))
308 (car (rassq (epg-sub-key-validity (car pointer))
309 epg-key-validity-alist)))
311 (epg-sub-key-id (car pointer))
314 (epg-sub-key-length (car pointer)))
316 (cdr (assq (epg-sub-key-algorithm (car pointer))
317 epg-pubkey-algorithm-alist))
319 (epg-sub-key-creation-time (car pointer))
320 (if (epg-sub-key-expiration-time (car pointer))
321 (format "\n\tExpires: %s" (epg-sub-key-expiration-time
325 (mapconcat #'symbol-name
326 (epg-sub-key-capability (car pointer))
329 (epg-sub-key-fingerprint (car pointer))
331 (setq pointer (cdr pointer)))
332 (goto-char (point-min))
333 (pop-to-buffer (current-buffer))
336 (defun epa-show-key-notify (widget &rest ignore)
337 (epa-show-key (widget-value widget)))
339 (defun epa-mark (&optional arg)
340 "Mark the current line."
342 (let ((inhibit-read-only t)
346 (setq properties (text-properties-at (point)))
348 (insert (if arg " " "*"))
349 (set-text-properties (1- (point)) (point) properties)
352 (defun epa-unmark (&optional arg)
353 "Unmark the current line."
355 (epa-mark (not arg)))
357 (defun epa-decrypt-file (file)
358 (interactive "fFile: ")
359 (let* ((default-name (file-name-sans-extension file))
360 (plain (expand-file-name
362 (concat "To file (default "
363 (file-name-nondirectory default-name)
365 (file-name-directory default-name)
367 (context (epg-make-context)))
368 (message "Decrypting %s..." (file-name-nondirectory file))
369 (epg-decrypt-file context file plain)
370 (message "Decrypting %s...done" (file-name-nondirectory file))))
372 (defun epa-verify-file (file)
373 (interactive "fFile: ")
374 (let* ((context (epg-make-context))
375 (plain (if (equal (file-name-extension file) "sig")
376 (file-name-sans-extension file)))
378 (message "Verifying %s..." (file-name-nondirectory file))
379 (epg-verify-file context file plain)
380 (setq signature (reverse (epg-context-result-for context 'verify)))
381 (with-output-to-temp-buffer "*epa-verify-file*"
382 (set-buffer standard-output)
384 (insert (format "%s: %s %s %s\n"
385 (epg-signature-status (car signature))
386 (epg-signature-key-id (car signature))
387 (epg-signature-user-id (car signature))
388 (epg-signature-validity (car signature))))
389 (setq signature (cdr signature))))
390 (shrink-window-if-larger-than-buffer
391 (get-buffer-window "*epa-verify-file*"))
392 (message "Verifying %s...done" (file-name-nondirectory file))))
394 (defun epa-sign-file (file detached)
396 (list (expand-file-name (read-file-name "File: "))
398 (let ((signature (concat file (if detached ".sig" ".gpg")))
399 (context (epg-make-context)))
400 (message "Signing %s..." (file-name-nondirectory file))
401 (epg-sign-file context file signature (if detached 'detached))
402 (message "Signing %s...done" (file-name-nondirectory file))))
404 (defun epa-encrypt-file (file recipients)
406 (list (expand-file-name (read-file-name "File: "))
407 (mapcar (lambda (key)
409 (car (epg-key-sub-key-list key))))
410 (epa-select-keys "Select recipents for encryption.
411 If no one is selected, symmetric encryption will be performed. "))))
412 (let ((cipher (concat file ".gpg"))
413 (context (epg-make-context)))
414 (message "Encrypting %s..." (file-name-nondirectory file))
415 (epg-encrypt-file context
419 (message "Encrypting %s...done" (file-name-nondirectory file))))