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74f50695 | 1 | ;;; epa-mail.el --- the EasyPG Assistant, minor-mode for mail composer -*- lexical-binding: t -*- |
ab422c4d | 2 | ;; Copyright (C) 2006-2013 Free Software Foundation, Inc. |
c154c0be MO |
3 | |
4 | ;; Author: Daiki Ueno <ueno@unixuser.org> | |
5 | ;; Keywords: PGP, GnuPG, mail, message | |
bd78fa1d | 6 | ;; Package: epa |
c154c0be MO |
7 | |
8 | ;; This file is part of GNU Emacs. | |
9 | ||
eb3fa2cf | 10 | ;; GNU Emacs is free software: you can redistribute it and/or modify |
c154c0be | 11 | ;; it under the terms of the GNU General Public License as published by |
eb3fa2cf GM |
12 | ;; the Free Software Foundation, either version 3 of the License, or |
13 | ;; (at your option) any later version. | |
c154c0be MO |
14 | |
15 | ;; GNU Emacs is distributed in the hope that it will be useful, | |
16 | ;; but WITHOUT ANY WARRANTY; without even the implied warranty of | |
17 | ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
18 | ;; GNU General Public License for more details. | |
19 | ||
20 | ;; You should have received a copy of the GNU General Public License | |
eb3fa2cf | 21 | ;; along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. |
c154c0be MO |
22 | |
23 | ;;; Code: | |
24 | ||
25 | (require 'epa) | |
26 | (require 'mail-utils) | |
27 | ||
28 | (defvar epa-mail-mode-map | |
29 | (let ((keymap (make-sparse-keymap))) | |
30 | (define-key keymap "\C-c\C-ed" 'epa-mail-decrypt) | |
31 | (define-key keymap "\C-c\C-ev" 'epa-mail-verify) | |
32 | (define-key keymap "\C-c\C-es" 'epa-mail-sign) | |
33 | (define-key keymap "\C-c\C-ee" 'epa-mail-encrypt) | |
34 | (define-key keymap "\C-c\C-ei" 'epa-mail-import-keys) | |
35 | (define-key keymap "\C-c\C-eo" 'epa-insert-keys) | |
78b84da3 DU |
36 | (define-key keymap "\C-c\C-e\C-d" 'epa-mail-decrypt) |
37 | (define-key keymap "\C-c\C-e\C-v" 'epa-mail-verify) | |
38 | (define-key keymap "\C-c\C-e\C-s" 'epa-mail-sign) | |
39 | (define-key keymap "\C-c\C-e\C-e" 'epa-mail-encrypt) | |
40 | (define-key keymap "\C-c\C-e\C-i" 'epa-mail-import-keys) | |
41 | (define-key keymap "\C-c\C-e\C-o" 'epa-insert-keys) | |
c154c0be MO |
42 | keymap)) |
43 | ||
44 | (defvar epa-mail-mode-hook nil) | |
45 | (defvar epa-mail-mode-on-hook nil) | |
46 | (defvar epa-mail-mode-off-hook nil) | |
47 | ||
f1914c40 | 48 | ;;;###autoload |
c154c0be | 49 | (define-minor-mode epa-mail-mode |
e1ac4066 GM |
50 | "A minor-mode for composing encrypted/clearsigned mails. |
51 | With a prefix argument ARG, enable the mode if ARG is positive, | |
52 | and disable it otherwise. If called from Lisp, enable the mode | |
53 | if ARG is omitted or nil." | |
c154c0be MO |
54 | nil " epa-mail" epa-mail-mode-map) |
55 | ||
56 | (defun epa-mail--find-usable-key (keys usage) | |
3644a0ab DU |
57 | "Find a usable key from KEYS for USAGE. |
58 | USAGE would be `sign' or `encrypt'." | |
c154c0be MO |
59 | (catch 'found |
60 | (while keys | |
61 | (let ((pointer (epg-key-sub-key-list (car keys)))) | |
62 | (while pointer | |
63 | (if (and (memq usage (epg-sub-key-capability (car pointer))) | |
64 | (not (memq (epg-sub-key-validity (car pointer)) | |
65 | '(revoked expired)))) | |
66 | (throw 'found (car keys))) | |
67 | (setq pointer (cdr pointer)))) | |
68 | (setq keys (cdr keys))))) | |
69 | ||
70 | ;;;###autoload | |
71 | (defun epa-mail-decrypt () | |
72 | "Decrypt OpenPGP armors in the current buffer. | |
73 | The buffer is expected to contain a mail message. | |
74 | ||
75 | Don't use this command in Lisp programs!" | |
76 | (interactive) | |
77 | (epa-decrypt-armor-in-region (point-min) (point-max))) | |
78 | ||
79 | ;;;###autoload | |
80 | (defun epa-mail-verify () | |
81 | "Verify OpenPGP cleartext signed messages in the current buffer. | |
82 | The buffer is expected to contain a mail message. | |
83 | ||
84 | Don't use this command in Lisp programs!" | |
85 | (interactive) | |
86 | (epa-verify-cleartext-in-region (point-min) (point-max))) | |
87 | ||
88 | ;;;###autoload | |
89 | (defun epa-mail-sign (start end signers mode) | |
90 | "Sign the current buffer. | |
91 | The buffer is expected to contain a mail message. | |
92 | ||
93 | Don't use this command in Lisp programs!" | |
94 | (interactive | |
95 | (save-excursion | |
96 | (goto-char (point-min)) | |
97 | (if (search-forward mail-header-separator nil t) | |
98 | (forward-line)) | |
99 | (setq epa-last-coding-system-specified | |
100 | (or coding-system-for-write | |
101 | (epa--select-safe-coding-system (point) (point-max)))) | |
102 | (let ((verbose current-prefix-arg)) | |
103 | (list (point) (point-max) | |
104 | (if verbose | |
105 | (epa-select-keys (epg-make-context epa-protocol) | |
106 | "Select keys for signing. | |
107 | If no one is selected, default secret key is used. " | |
108 | nil t)) | |
109 | (if verbose | |
110 | (epa--read-signature-type) | |
111 | 'clear))))) | |
112 | (epa-sign-region start end signers mode)) | |
113 | ||
114 | ;;;###autoload | |
115 | (defun epa-mail-encrypt (start end recipients sign signers) | |
116 | "Encrypt the current buffer. | |
117 | The buffer is expected to contain a mail message. | |
118 | ||
119 | Don't use this command in Lisp programs!" | |
120 | (interactive | |
121 | (save-excursion | |
122 | (let ((verbose current-prefix-arg) | |
3644a0ab | 123 | (config (epg-configuration)) |
c154c0be | 124 | (context (epg-make-context epa-protocol)) |
74f50695 | 125 | recipients-string recipients recipient-key sign) |
c154c0be MO |
126 | (goto-char (point-min)) |
127 | (save-restriction | |
128 | (narrow-to-region (point) | |
129 | (if (search-forward mail-header-separator nil 0) | |
130 | (match-beginning 0) | |
131 | (point))) | |
6ee79275 DU |
132 | (setq recipients-string |
133 | (mapconcat #'identity | |
134 | (nconc (mail-fetch-field "to" nil nil t) | |
135 | (mail-fetch-field "cc" nil nil t) | |
136 | (mail-fetch-field "bcc" nil nil t)) | |
137 | ",")) | |
c154c0be MO |
138 | (setq recipients |
139 | (mail-strip-quoted-names | |
6ee79275 DU |
140 | (with-temp-buffer |
141 | (insert "to: " recipients-string "\n") | |
142 | (expand-mail-aliases (point-min) (point-max)) | |
143 | (car (mail-fetch-field "to" nil nil t)))))) | |
c154c0be MO |
144 | (if recipients |
145 | (setq recipients (delete "" | |
6ee79275 DU |
146 | (split-string recipients |
147 | "[ \t\n]*,[ \t\n]*")))) | |
04963aa8 RS |
148 | |
149 | ;; Process all the recipients thru the list of GnuPG groups. | |
150 | ;; Expand GnuPG group names to what they stand for. | |
3644a0ab DU |
151 | (setq recipients |
152 | (apply #'nconc | |
153 | (mapcar | |
154 | (lambda (recipient) | |
155 | (or (epg-expand-group config recipient) | |
156 | (list recipient))) | |
157 | recipients))) | |
04963aa8 | 158 | |
c154c0be MO |
159 | (goto-char (point-min)) |
160 | (if (search-forward mail-header-separator nil t) | |
161 | (forward-line)) | |
162 | (setq epa-last-coding-system-specified | |
163 | (or coding-system-for-write | |
164 | (epa--select-safe-coding-system (point) (point-max)))) | |
165 | (list (point) (point-max) | |
166 | (if verbose | |
167 | (epa-select-keys | |
168 | context | |
169 | "Select recipients for encryption. | |
170 | If no one is selected, symmetric encryption will be performed. " | |
171 | recipients) | |
172 | (if recipients | |
69de3ec6 RS |
173 | (apply |
174 | 'nconc | |
175 | (mapcar | |
176 | (lambda (recipient) | |
177 | (setq recipient-key | |
178 | (epa-mail--find-usable-key | |
179 | (epg-list-keys | |
180 | (epg-make-context epa-protocol) | |
181 | (if (string-match "@" recipient) | |
182 | (concat "<" recipient ">") | |
183 | recipient)) | |
184 | 'encrypt)) | |
185 | (unless (or recipient-key | |
186 | (y-or-n-p | |
187 | (format | |
188 | "No public key for %s; skip it? " | |
189 | recipient))) | |
190 | (error "No public key for %s" recipient)) | |
191 | (if recipient-key (list recipient-key))) | |
192 | recipients)))) | |
c154c0be MO |
193 | (setq sign (if verbose (y-or-n-p "Sign? "))) |
194 | (if sign | |
195 | (epa-select-keys context | |
196 | "Select keys for signing. ")))))) | |
92795c91 RS |
197 | ;; Don't let some read-only text stop us from encrypting. |
198 | (let ((inhibit-read-only t)) | |
199 | (epa-encrypt-region start end recipients sign signers))) | |
c154c0be MO |
200 | |
201 | ;;;###autoload | |
202 | (defun epa-mail-import-keys () | |
203 | "Import keys in the OpenPGP armor format in the current buffer. | |
204 | The buffer is expected to contain a mail message. | |
205 | ||
206 | Don't use this command in Lisp programs!" | |
207 | (interactive) | |
208 | (epa-import-armor-in-region (point-min) (point-max))) | |
209 | ||
f1914c40 | 210 | ;;;###autoload |
78df961d | 211 | (define-minor-mode epa-global-mail-mode |
e1ac4066 GM |
212 | "Minor mode to hook EasyPG into Mail mode. |
213 | With a prefix argument ARG, enable the mode if ARG is positive, | |
214 | and disable it otherwise. If called from Lisp, enable the mode | |
215 | if ARG is omitted or nil." | |
f1914c40 MO |
216 | :global t :init-value nil :group 'epa-mail :version "23.1" |
217 | (remove-hook 'mail-mode-hook 'epa-mail-mode) | |
78df961d | 218 | (if epa-global-mail-mode |
f1914c40 MO |
219 | (add-hook 'mail-mode-hook 'epa-mail-mode))) |
220 | ||
c154c0be MO |
221 | (provide 'epa-mail) |
222 | ||
223 | ;;; epa-mail.el ends here |