1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
|
;;; epa-mail.el --- the EasyPG Assistant, minor-mode for mail composer
;; Copyright (C) 2006-2011 Free Software Foundation, Inc.
;; Author: Daiki Ueno <ueno@unixuser.org>
;; Keywords: PGP, GnuPG, mail, message
;; Package: epa
;; This file is part of GNU Emacs.
;; GNU Emacs is free software: you can redistribute it and/or modify
;; it under the terms of the GNU General Public License as published by
;; the Free Software Foundation, either version 3 of the License, or
;; (at your option) any later version.
;; GNU Emacs is distributed in the hope that it will be useful,
;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
;; GNU General Public License for more details.
;; You should have received a copy of the GNU General Public License
;; along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
;;; Code:
(require 'epa)
(require 'mail-utils)
(defvar epa-mail-mode-map
(let ((keymap (make-sparse-keymap)))
(define-key keymap "\C-c\C-ed" 'epa-mail-decrypt)
(define-key keymap "\C-c\C-ev" 'epa-mail-verify)
(define-key keymap "\C-c\C-es" 'epa-mail-sign)
(define-key keymap "\C-c\C-ee" 'epa-mail-encrypt)
(define-key keymap "\C-c\C-ei" 'epa-mail-import-keys)
(define-key keymap "\C-c\C-eo" 'epa-insert-keys)
(define-key keymap "\C-c\C-e\C-d" 'epa-mail-decrypt)
(define-key keymap "\C-c\C-e\C-v" 'epa-mail-verify)
(define-key keymap "\C-c\C-e\C-s" 'epa-mail-sign)
(define-key keymap "\C-c\C-e\C-e" 'epa-mail-encrypt)
(define-key keymap "\C-c\C-e\C-i" 'epa-mail-import-keys)
(define-key keymap "\C-c\C-e\C-o" 'epa-insert-keys)
keymap))
(defvar epa-mail-mode-hook nil)
(defvar epa-mail-mode-on-hook nil)
(defvar epa-mail-mode-off-hook nil)
;;;###autoload
(define-minor-mode epa-mail-mode
"A minor-mode for composing encrypted/clearsigned mails."
nil " epa-mail" epa-mail-mode-map)
(defun epa-mail--find-usable-key (keys usage)
"Find a usable key from KEYS for USAGE."
(catch 'found
(while keys
(let ((pointer (epg-key-sub-key-list (car keys))))
(while pointer
(if (and (memq usage (epg-sub-key-capability (car pointer)))
(not (memq (epg-sub-key-validity (car pointer))
'(revoked expired))))
(throw 'found (car keys)))
(setq pointer (cdr pointer))))
(setq keys (cdr keys)))))
;;;###autoload
(defun epa-mail-decrypt ()
"Decrypt OpenPGP armors in the current buffer.
The buffer is expected to contain a mail message.
Don't use this command in Lisp programs!"
(interactive)
(epa-decrypt-armor-in-region (point-min) (point-max)))
;;;###autoload
(defun epa-mail-verify ()
"Verify OpenPGP cleartext signed messages in the current buffer.
The buffer is expected to contain a mail message.
Don't use this command in Lisp programs!"
(interactive)
(epa-verify-cleartext-in-region (point-min) (point-max)))
;;;###autoload
(defun epa-mail-sign (start end signers mode)
"Sign the current buffer.
The buffer is expected to contain a mail message.
Don't use this command in Lisp programs!"
(interactive
(save-excursion
(goto-char (point-min))
(if (search-forward mail-header-separator nil t)
(forward-line))
(setq epa-last-coding-system-specified
(or coding-system-for-write
(epa--select-safe-coding-system (point) (point-max))))
(let ((verbose current-prefix-arg))
(list (point) (point-max)
(if verbose
(epa-select-keys (epg-make-context epa-protocol)
"Select keys for signing.
If no one is selected, default secret key is used. "
nil t))
(if verbose
(epa--read-signature-type)
'clear)))))
(epa-sign-region start end signers mode))
;;;###autoload
(defun epa-mail-encrypt (start end recipients sign signers)
"Encrypt the current buffer.
The buffer is expected to contain a mail message.
Don't use this command in Lisp programs!"
(interactive
(save-excursion
(let ((verbose current-prefix-arg)
(context (epg-make-context epa-protocol))
recipients-string recipients recipient-key)
(goto-char (point-min))
(save-restriction
(narrow-to-region (point)
(if (search-forward mail-header-separator nil 0)
(match-beginning 0)
(point)))
(setq recipients-string
(mapconcat #'identity
(nconc (mail-fetch-field "to" nil nil t)
(mail-fetch-field "cc" nil nil t)
(mail-fetch-field "bcc" nil nil t))
","))
(setq recipients
(mail-strip-quoted-names
(with-temp-buffer
(insert "to: " recipients-string "\n")
(expand-mail-aliases (point-min) (point-max))
(car (mail-fetch-field "to" nil nil t))))))
(if recipients
(setq recipients (delete ""
(split-string recipients
"[ \t\n]*,[ \t\n]*"))))
(goto-char (point-min))
(if (search-forward mail-header-separator nil t)
(forward-line))
(setq epa-last-coding-system-specified
(or coding-system-for-write
(epa--select-safe-coding-system (point) (point-max))))
(list (point) (point-max)
(if verbose
(epa-select-keys
context
"Select recipients for encryption.
If no one is selected, symmetric encryption will be performed. "
recipients)
(if recipients
(mapcar
(lambda (recipient)
(setq recipient-key
(epa-mail--find-usable-key
(epg-list-keys
(epg-make-context epa-protocol)
(if (string-match "@" recipient)
(concat "<" recipient ">")
recipient))
'encrypt))
(unless (or recipient-key
(y-or-n-p
(format
"No public key for %s; skip it? "
recipient)))
(error "No public key for %s" recipient))
recipient-key)
recipients)))
(setq sign (if verbose (y-or-n-p "Sign? ")))
(if sign
(epa-select-keys context
"Select keys for signing. "))))))
(epa-encrypt-region start end recipients sign signers))
;;;###autoload
(defun epa-mail-import-keys ()
"Import keys in the OpenPGP armor format in the current buffer.
The buffer is expected to contain a mail message.
Don't use this command in Lisp programs!"
(interactive)
(epa-import-armor-in-region (point-min) (point-max)))
;;;###autoload
(define-minor-mode epa-global-mail-mode
"Minor mode to hook EasyPG into Mail mode."
:global t :init-value nil :group 'epa-mail :version "23.1"
(remove-hook 'mail-mode-hook 'epa-mail-mode)
(if epa-global-mail-mode
(add-hook 'mail-mode-hook 'epa-mail-mode)))
(provide 'epa-mail)
;;; epa-mail.el ends here
|
