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23f87bed | 1 | ;;; mml2015.el --- MIME Security with Pretty Good Privacy (PGP) |
e84b4b86 | 2 | |
8abf1b22 | 3 | ;; Copyright (C) 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, |
5df4f04c | 4 | ;; 2008, 2009, 2010, 2011 Free Software Foundation, Inc. |
23f87bed MB |
5 | |
6 | ;; Author: Shenghuo Zhu <zsh@cs.rochester.edu> | |
7 | ;; Keywords: PGP MIME MML | |
8 | ||
9 | ;; This file is part of GNU Emacs. | |
10 | ||
5e809f55 GM |
11 | ;; GNU Emacs is free software: you can redistribute it and/or modify |
12 | ;; it under the terms of the GNU General Public License as published by | |
13 | ;; the Free Software Foundation, either version 3 of the License, or | |
14 | ;; (at your option) any later version. | |
23f87bed | 15 | |
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16 | ;; GNU Emacs is distributed in the hope that it will be useful, |
17 | ;; but WITHOUT ANY WARRANTY; without even the implied warranty of | |
18 | ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
19 | ;; GNU General Public License for more details. | |
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20 | |
21 | ;; You should have received a copy of the GNU General Public License | |
5e809f55 | 22 | ;; along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. |
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23 | |
24 | ;;; Commentary: | |
25 | ||
26 | ;; RFC 2015 is updated by RFC 3156, this file should be compatible | |
27 | ;; with both. | |
28 | ||
29 | ;;; Code: | |
30 | ||
5a12b40c GM |
31 | ;; For Emacs < 22.2. |
32 | (eval-and-compile | |
33 | (unless (fboundp 'declare-function) (defmacro declare-function (&rest r)))) | |
34 | ||
23f87bed MB |
35 | (eval-when-compile (require 'cl)) |
36 | (require 'mm-decode) | |
37 | (require 'mm-util) | |
38 | (require 'mml) | |
01c52d31 | 39 | (require 'mml-sec) |
23f87bed | 40 | |
4ae9592b JB |
41 | (defvar mc-pgp-always-sign) |
42 | ||
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43 | (declare-function epg-check-configuration "ext:epg-config" |
44 | (config &optional minimum-version)) | |
45 | (declare-function epg-configuration "ext:epg-config" ()) | |
46 | ||
23f87bed | 47 | (defvar mml2015-use (or |
01c52d31 MB |
48 | (condition-case nil |
49 | (progn | |
50 | (require 'epg-config) | |
51 | (epg-check-configuration (epg-configuration)) | |
52 | 'epg) | |
53 | (error)) | |
23f87bed MB |
54 | (progn |
55 | (ignore-errors | |
01c52d31 MB |
56 | ;; Avoid the "Recursive load suspected" error |
57 | ;; in Emacs 21.1. | |
58 | (let ((recursive-load-depth-limit 100)) | |
59 | (require 'pgg))) | |
23f87bed MB |
60 | (and (fboundp 'pgg-sign-region) |
61 | 'pgg)) | |
62 | (progn | |
63 | (ignore-errors | |
64 | (require 'gpg)) | |
65 | (and (fboundp 'gpg-sign-detached) | |
66 | 'gpg)) | |
67 | (progn (ignore-errors | |
68 | (load "mc-toplev")) | |
69 | (and (fboundp 'mc-encrypt-generic) | |
70 | (fboundp 'mc-sign-generic) | |
71 | (fboundp 'mc-cleanup-recipient-headers) | |
72 | 'mailcrypt))) | |
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73 | "The package used for PGP/MIME. |
74 | Valid packages include `epg', `pgg', `gpg' and `mailcrypt'.") | |
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75 | |
76 | ;; Something is not RFC2015. | |
77 | (defvar mml2015-function-alist | |
78 | '((mailcrypt mml2015-mailcrypt-sign | |
79 | mml2015-mailcrypt-encrypt | |
80 | mml2015-mailcrypt-verify | |
81 | mml2015-mailcrypt-decrypt | |
82 | mml2015-mailcrypt-clear-verify | |
83 | mml2015-mailcrypt-clear-decrypt) | |
84 | (gpg mml2015-gpg-sign | |
85 | mml2015-gpg-encrypt | |
86 | mml2015-gpg-verify | |
87 | mml2015-gpg-decrypt | |
88 | mml2015-gpg-clear-verify | |
89 | mml2015-gpg-clear-decrypt) | |
90 | (pgg mml2015-pgg-sign | |
91 | mml2015-pgg-encrypt | |
92 | mml2015-pgg-verify | |
93 | mml2015-pgg-decrypt | |
94 | mml2015-pgg-clear-verify | |
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95 | mml2015-pgg-clear-decrypt) |
96 | (epg mml2015-epg-sign | |
97 | mml2015-epg-encrypt | |
98 | mml2015-epg-verify | |
99 | mml2015-epg-decrypt | |
100 | mml2015-epg-clear-verify | |
101 | mml2015-epg-clear-decrypt)) | |
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102 | "Alist of PGP/MIME functions.") |
103 | ||
104 | (defvar mml2015-result-buffer nil) | |
105 | ||
106 | (defcustom mml2015-unabbrev-trust-alist | |
107 | '(("TRUST_UNDEFINED" . nil) | |
108 | ("TRUST_NEVER" . nil) | |
109 | ("TRUST_MARGINAL" . t) | |
110 | ("TRUST_FULLY" . t) | |
111 | ("TRUST_ULTIMATE" . t)) | |
112 | "Map GnuPG trust output values to a boolean saying if you trust the key." | |
bf247b6e | 113 | :version "22.1" |
e79f14a4 | 114 | :group 'mime-security |
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115 | :type '(repeat (cons (regexp :tag "GnuPG output regexp") |
116 | (boolean :tag "Trust key")))) | |
117 | ||
01c52d31 MB |
118 | (defcustom mml2015-verbose mml-secure-verbose |
119 | "If non-nil, ask the user about the current operation more verbosely." | |
120 | :group 'mime-security | |
121 | :type 'boolean) | |
122 | ||
123 | (defcustom mml2015-cache-passphrase mml-secure-cache-passphrase | |
124 | "If t, cache passphrase." | |
125 | :group 'mime-security | |
126 | :type 'boolean) | |
127 | ||
128 | (defcustom mml2015-passphrase-cache-expiry mml-secure-passphrase-cache-expiry | |
129 | "How many seconds the passphrase is cached. | |
130 | Whether the passphrase is cached at all is controlled by | |
131 | `mml2015-cache-passphrase'." | |
132 | :group 'mime-security | |
133 | :type 'integer) | |
134 | ||
135 | (defcustom mml2015-signers nil | |
136 | "A list of your own key ID which will be used to sign a message." | |
137 | :group 'mime-security | |
138 | :type '(repeat (string :tag "Key ID"))) | |
139 | ||
140 | (defcustom mml2015-encrypt-to-self nil | |
141 | "If t, add your own key ID to recipient list when encryption." | |
142 | :group 'mime-security | |
143 | :type 'boolean) | |
144 | ||
145 | (defcustom mml2015-always-trust t | |
146 | "If t, GnuPG skip key validation on encryption." | |
147 | :group 'mime-security | |
148 | :type 'boolean) | |
149 | ||
150 | ;; Extract plaintext from cleartext signature. IMO, this kind of task | |
151 | ;; should be done by GnuPG rather than Elisp, but older PGP backends | |
152 | ;; (such as Mailcrypt, PGG, and gpg.el) discard the output from GnuPG. | |
153 | (defun mml2015-extract-cleartext-signature () | |
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154 | ;; Daiki Ueno in |
155 | ;; <54a15d860801080142l70b95d7dkac4bf51a86196011@mail.gmail.com>: ``I still | |
156 | ;; believe that the right way is to use the plaintext output from GnuPG as | |
157 | ;; it is, and mml2015-extract-cleartext-signature is just a kludge for | |
158 | ;; misdesigned libraries like PGG, which have no ability to do that. So, I | |
159 | ;; think it should not have descriptive documentation.'' | |
160 | ;; | |
161 | ;; This function doesn't handle NotDashEscaped correctly. EasyPG handles it | |
162 | ;; correctly. | |
163 | ;; http://thread.gmane.org/gmane.emacs.gnus.general/66062/focus=66082 | |
164 | ;; http://thread.gmane.org/gmane.emacs.gnus.general/65087/focus=65109 | |
01c52d31 MB |
165 | (goto-char (point-min)) |
166 | (forward-line) | |
167 | ;; We need to be careful not to strip beyond the armor headers. | |
168 | ;; Previously, an attacker could replace the text inside our | |
169 | ;; markup with trailing garbage by injecting whitespace into the | |
170 | ;; message. | |
171 | (while (looking-at "Hash:") ; The only header allowed in cleartext | |
172 | (forward-line)) ; signatures according to RFC2440. | |
173 | (when (looking-at "[\t ]*$") | |
174 | (forward-line)) | |
175 | (delete-region (point-min) (point)) | |
176 | (if (re-search-forward "^-----BEGIN PGP SIGNATURE-----" nil t) | |
177 | (delete-region (match-beginning 0) (point-max))) | |
178 | (goto-char (point-min)) | |
179 | (while (re-search-forward "^- " nil t) | |
180 | (replace-match "" t t) | |
181 | (forward-line 1))) | |
182 | ||
23f87bed MB |
183 | ;;; mailcrypt wrapper |
184 | ||
8abf1b22 GM |
185 | (autoload 'mailcrypt-decrypt "mailcrypt") |
186 | (autoload 'mailcrypt-verify "mailcrypt") | |
187 | (autoload 'mc-pgp-always-sign "mailcrypt") | |
188 | (autoload 'mc-encrypt-generic "mc-toplev") | |
189 | (autoload 'mc-cleanup-recipient-headers "mc-toplev") | |
190 | (autoload 'mc-sign-generic "mc-toplev") | |
23f87bed | 191 | |
9efa445f DN |
192 | (defvar mc-default-scheme) |
193 | (defvar mc-schemes) | |
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194 | |
195 | (defvar mml2015-decrypt-function 'mailcrypt-decrypt) | |
196 | (defvar mml2015-verify-function 'mailcrypt-verify) | |
197 | ||
198 | (defun mml2015-format-error (err) | |
199 | (if (stringp (cadr err)) | |
200 | (cadr err) | |
201 | (format "%S" (cdr err)))) | |
202 | ||
203 | (defun mml2015-mailcrypt-decrypt (handle ctl) | |
204 | (catch 'error | |
205 | (let (child handles result) | |
206 | (unless (setq child (mm-find-part-by-type | |
207 | (cdr handle) | |
208 | "application/octet-stream" nil t)) | |
209 | (mm-set-handle-multipart-parameter | |
210 | mm-security-handle 'gnus-info "Corrupted") | |
211 | (throw 'error handle)) | |
212 | (with-temp-buffer | |
213 | (mm-insert-part child) | |
214 | (setq result | |
215 | (condition-case err | |
216 | (funcall mml2015-decrypt-function) | |
217 | (error | |
218 | (mm-set-handle-multipart-parameter | |
219 | mm-security-handle 'gnus-details (mml2015-format-error err)) | |
220 | nil) | |
221 | (quit | |
222 | (mm-set-handle-multipart-parameter | |
223 | mm-security-handle 'gnus-details "Quit.") | |
224 | nil))) | |
225 | (unless (car result) | |
226 | (mm-set-handle-multipart-parameter | |
227 | mm-security-handle 'gnus-info "Failed") | |
228 | (throw 'error handle)) | |
229 | (setq handles (mm-dissect-buffer t))) | |
230 | (mm-destroy-parts handle) | |
231 | (mm-set-handle-multipart-parameter | |
232 | mm-security-handle 'gnus-info | |
233 | (concat "OK" | |
234 | (let ((sig (with-current-buffer mml2015-result-buffer | |
235 | (mml2015-gpg-extract-signature-details)))) | |
236 | (concat ", Signer: " sig)))) | |
237 | (if (listp (car handles)) | |
238 | handles | |
239 | (list handles))))) | |
240 | ||
241 | (defun mml2015-mailcrypt-clear-decrypt () | |
242 | (let (result) | |
243 | (setq result | |
244 | (condition-case err | |
245 | (funcall mml2015-decrypt-function) | |
246 | (error | |
247 | (mm-set-handle-multipart-parameter | |
248 | mm-security-handle 'gnus-details (mml2015-format-error err)) | |
249 | nil) | |
250 | (quit | |
251 | (mm-set-handle-multipart-parameter | |
252 | mm-security-handle 'gnus-details "Quit.") | |
253 | nil))) | |
254 | (if (car result) | |
255 | (mm-set-handle-multipart-parameter | |
256 | mm-security-handle 'gnus-info "OK") | |
257 | (mm-set-handle-multipart-parameter | |
258 | mm-security-handle 'gnus-info "Failed")))) | |
259 | ||
260 | (defun mml2015-fix-micalg (alg) | |
261 | (and alg | |
262 | ;; Mutt/1.2.5i has seen sending micalg=php-sha1 | |
263 | (upcase (if (string-match "^p[gh]p-" alg) | |
264 | (substring alg (match-end 0)) | |
265 | alg)))) | |
266 | ||
267 | (defun mml2015-mailcrypt-verify (handle ctl) | |
268 | (catch 'error | |
269 | (let (part) | |
270 | (unless (setq part (mm-find-raw-part-by-type | |
271 | ctl (or (mm-handle-multipart-ctl-parameter | |
272 | ctl 'protocol) | |
273 | "application/pgp-signature") | |
274 | t)) | |
275 | (mm-set-handle-multipart-parameter | |
276 | mm-security-handle 'gnus-info "Corrupted") | |
277 | (throw 'error handle)) | |
278 | (with-temp-buffer | |
279 | (insert "-----BEGIN PGP SIGNED MESSAGE-----\n") | |
280 | (insert (format "Hash: %s\n\n" | |
281 | (or (mml2015-fix-micalg | |
282 | (mm-handle-multipart-ctl-parameter | |
283 | ctl 'micalg)) | |
284 | "SHA1"))) | |
285 | (save-restriction | |
286 | (narrow-to-region (point) (point)) | |
287 | (insert part "\n") | |
288 | (goto-char (point-min)) | |
289 | (while (not (eobp)) | |
290 | (if (looking-at "^-") | |
291 | (insert "- ")) | |
292 | (forward-line))) | |
293 | (unless (setq part (mm-find-part-by-type | |
294 | (cdr handle) "application/pgp-signature" nil t)) | |
295 | (mm-set-handle-multipart-parameter | |
296 | mm-security-handle 'gnus-info "Corrupted") | |
297 | (throw 'error handle)) | |
298 | (save-restriction | |
299 | (narrow-to-region (point) (point)) | |
300 | (mm-insert-part part) | |
301 | (goto-char (point-min)) | |
302 | (if (re-search-forward "^-----BEGIN PGP [^-]+-----\r?$" nil t) | |
303 | (replace-match "-----BEGIN PGP SIGNATURE-----" t t)) | |
304 | (if (re-search-forward "^-----END PGP [^-]+-----\r?$" nil t) | |
305 | (replace-match "-----END PGP SIGNATURE-----" t t))) | |
306 | (let ((mc-gpg-debug-buffer (get-buffer-create " *gnus gpg debug*"))) | |
307 | (unless (condition-case err | |
308 | (prog1 | |
309 | (funcall mml2015-verify-function) | |
310 | (if (get-buffer " *mailcrypt stderr temp") | |
311 | (mm-set-handle-multipart-parameter | |
312 | mm-security-handle 'gnus-details | |
313 | (with-current-buffer " *mailcrypt stderr temp" | |
314 | (buffer-string)))) | |
315 | (if (get-buffer " *mailcrypt stdout temp") | |
316 | (kill-buffer " *mailcrypt stdout temp")) | |
317 | (if (get-buffer " *mailcrypt stderr temp") | |
318 | (kill-buffer " *mailcrypt stderr temp")) | |
319 | (if (get-buffer " *mailcrypt status temp") | |
320 | (kill-buffer " *mailcrypt status temp")) | |
321 | (if (get-buffer mc-gpg-debug-buffer) | |
322 | (kill-buffer mc-gpg-debug-buffer))) | |
323 | (error | |
324 | (mm-set-handle-multipart-parameter | |
325 | mm-security-handle 'gnus-details (mml2015-format-error err)) | |
326 | nil) | |
327 | (quit | |
328 | (mm-set-handle-multipart-parameter | |
329 | mm-security-handle 'gnus-details "Quit.") | |
330 | nil)) | |
331 | (mm-set-handle-multipart-parameter | |
332 | mm-security-handle 'gnus-info "Failed") | |
333 | (throw 'error handle)))) | |
334 | (mm-set-handle-multipart-parameter | |
335 | mm-security-handle 'gnus-info "OK") | |
336 | handle))) | |
337 | ||
338 | (defun mml2015-mailcrypt-clear-verify () | |
339 | (let ((mc-gpg-debug-buffer (get-buffer-create " *gnus gpg debug*"))) | |
340 | (if (condition-case err | |
341 | (prog1 | |
342 | (funcall mml2015-verify-function) | |
343 | (if (get-buffer " *mailcrypt stderr temp") | |
344 | (mm-set-handle-multipart-parameter | |
345 | mm-security-handle 'gnus-details | |
346 | (with-current-buffer " *mailcrypt stderr temp" | |
347 | (buffer-string)))) | |
348 | (if (get-buffer " *mailcrypt stdout temp") | |
349 | (kill-buffer " *mailcrypt stdout temp")) | |
350 | (if (get-buffer " *mailcrypt stderr temp") | |
351 | (kill-buffer " *mailcrypt stderr temp")) | |
352 | (if (get-buffer " *mailcrypt status temp") | |
353 | (kill-buffer " *mailcrypt status temp")) | |
354 | (if (get-buffer mc-gpg-debug-buffer) | |
355 | (kill-buffer mc-gpg-debug-buffer))) | |
356 | (error | |
357 | (mm-set-handle-multipart-parameter | |
358 | mm-security-handle 'gnus-details (mml2015-format-error err)) | |
359 | nil) | |
360 | (quit | |
361 | (mm-set-handle-multipart-parameter | |
362 | mm-security-handle 'gnus-details "Quit.") | |
363 | nil)) | |
364 | (mm-set-handle-multipart-parameter | |
365 | mm-security-handle 'gnus-info "OK") | |
366 | (mm-set-handle-multipart-parameter | |
01c52d31 MB |
367 | mm-security-handle 'gnus-info "Failed"))) |
368 | (mml2015-extract-cleartext-signature)) | |
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369 | |
370 | (defun mml2015-mailcrypt-sign (cont) | |
371 | (mc-sign-generic (message-options-get 'message-sender) | |
372 | nil nil nil nil) | |
373 | (let ((boundary (mml-compute-boundary cont)) | |
374 | hash point) | |
375 | (goto-char (point-min)) | |
376 | (unless (re-search-forward "^-----BEGIN PGP SIGNED MESSAGE-----\r?$" nil t) | |
377 | (error "Cannot find signed begin line")) | |
378 | (goto-char (match-beginning 0)) | |
379 | (forward-line 1) | |
380 | (unless (looking-at "Hash:[ \t]*\\([a-zA-Z0-9]+\\)") | |
381 | (error "Cannot not find PGP hash")) | |
382 | (setq hash (match-string 1)) | |
383 | (unless (re-search-forward "^$" nil t) | |
384 | (error "Cannot not find PGP message")) | |
385 | (forward-line 1) | |
386 | (delete-region (point-min) (point)) | |
387 | (insert (format "Content-Type: multipart/signed; boundary=\"%s\";\n" | |
388 | boundary)) | |
389 | (insert (format "\tmicalg=pgp-%s; protocol=\"application/pgp-signature\"\n" | |
390 | (downcase hash))) | |
391 | (insert (format "\n--%s\n" boundary)) | |
392 | (setq point (point)) | |
393 | (goto-char (point-max)) | |
394 | (unless (re-search-backward "^-----END PGP SIGNATURE-----\r?$" nil t) | |
395 | (error "Cannot find signature part")) | |
396 | (replace-match "-----END PGP MESSAGE-----" t t) | |
397 | (goto-char (match-beginning 0)) | |
398 | (unless (re-search-backward "^-----BEGIN PGP SIGNATURE-----\r?$" | |
399 | nil t) | |
400 | (error "Cannot find signature part")) | |
401 | (replace-match "-----BEGIN PGP MESSAGE-----" t t) | |
402 | (goto-char (match-beginning 0)) | |
403 | (save-restriction | |
404 | (narrow-to-region point (point)) | |
405 | (goto-char point) | |
406 | (while (re-search-forward "^- -" nil t) | |
407 | (replace-match "-" t t)) | |
408 | (goto-char (point-max))) | |
409 | (insert (format "--%s\n" boundary)) | |
410 | (insert "Content-Type: application/pgp-signature\n\n") | |
411 | (goto-char (point-max)) | |
412 | (insert (format "--%s--\n" boundary)) | |
413 | (goto-char (point-max)))) | |
414 | ||
5a12b40c GM |
415 | ;; We require mm-decode, which requires mm-bodies, which autoloads |
416 | ;; message-options-get (!). | |
417 | (declare-function message-options-set "message" (symbol value)) | |
418 | ||
23f87bed MB |
419 | (defun mml2015-mailcrypt-encrypt (cont &optional sign) |
420 | (let ((mc-pgp-always-sign | |
421 | (or mc-pgp-always-sign | |
422 | sign | |
423 | (eq t (or (message-options-get 'message-sign-encrypt) | |
424 | (message-options-set | |
425 | 'message-sign-encrypt | |
426 | (or (y-or-n-p "Sign the message? ") | |
427 | 'not)))) | |
428 | 'never))) | |
429 | (mm-with-unibyte-current-buffer | |
430 | (mc-encrypt-generic | |
431 | (or (message-options-get 'message-recipients) | |
432 | (message-options-set 'message-recipients | |
433 | (mc-cleanup-recipient-headers | |
434 | (read-string "Recipients: ")))) | |
435 | nil nil nil | |
436 | (message-options-get 'message-sender)))) | |
437 | (goto-char (point-min)) | |
438 | (unless (looking-at "-----BEGIN PGP MESSAGE-----") | |
439 | (error "Fail to encrypt the message")) | |
440 | (let ((boundary (mml-compute-boundary cont))) | |
441 | (insert (format "Content-Type: multipart/encrypted; boundary=\"%s\";\n" | |
442 | boundary)) | |
443 | (insert "\tprotocol=\"application/pgp-encrypted\"\n\n") | |
444 | (insert (format "--%s\n" boundary)) | |
445 | (insert "Content-Type: application/pgp-encrypted\n\n") | |
446 | (insert "Version: 1\n\n") | |
447 | (insert (format "--%s\n" boundary)) | |
448 | (insert "Content-Type: application/octet-stream\n\n") | |
449 | (goto-char (point-max)) | |
450 | (insert (format "--%s--\n" boundary)) | |
451 | (goto-char (point-max)))) | |
452 | ||
453 | ;;; gpg wrapper | |
454 | ||
8abf1b22 GM |
455 | (autoload 'gpg-decrypt "gpg") |
456 | (autoload 'gpg-verify "gpg") | |
457 | (autoload 'gpg-verify-cleartext "gpg") | |
458 | (autoload 'gpg-sign-detached "gpg") | |
459 | (autoload 'gpg-sign-encrypt "gpg") | |
460 | (autoload 'gpg-encrypt "gpg") | |
461 | (autoload 'gpg-passphrase-read "gpg") | |
23f87bed MB |
462 | |
463 | (defun mml2015-gpg-passphrase () | |
464 | (or (message-options-get 'gpg-passphrase) | |
465 | (message-options-set 'gpg-passphrase (gpg-passphrase-read)))) | |
466 | ||
467 | (defun mml2015-gpg-decrypt-1 () | |
468 | (let ((cipher (current-buffer)) plain result) | |
469 | (if (with-temp-buffer | |
470 | (prog1 | |
471 | (gpg-decrypt cipher (setq plain (current-buffer)) | |
472 | mml2015-result-buffer nil) | |
473 | (mm-set-handle-multipart-parameter | |
474 | mm-security-handle 'gnus-details | |
475 | (with-current-buffer mml2015-result-buffer | |
476 | (buffer-string))) | |
477 | (set-buffer cipher) | |
478 | (erase-buffer) | |
479 | (insert-buffer-substring plain) | |
480 | (goto-char (point-min)) | |
481 | (while (search-forward "\r\n" nil t) | |
482 | (replace-match "\n" t t)))) | |
483 | '(t) | |
484 | ;; Some wrong with the return value, check plain text buffer. | |
485 | (if (> (point-max) (point-min)) | |
486 | '(t) | |
487 | nil)))) | |
488 | ||
489 | (defun mml2015-gpg-decrypt (handle ctl) | |
490 | (let ((mml2015-decrypt-function 'mml2015-gpg-decrypt-1)) | |
491 | (mml2015-mailcrypt-decrypt handle ctl))) | |
492 | ||
493 | (defun mml2015-gpg-clear-decrypt () | |
494 | (let (result) | |
495 | (setq result (mml2015-gpg-decrypt-1)) | |
496 | (if (car result) | |
497 | (mm-set-handle-multipart-parameter | |
498 | mm-security-handle 'gnus-info "OK") | |
499 | (mm-set-handle-multipart-parameter | |
500 | mm-security-handle 'gnus-info "Failed")))) | |
501 | ||
502 | (defun mml2015-gpg-pretty-print-fpr (fingerprint) | |
503 | (let* ((result "") | |
504 | (fpr-length (string-width fingerprint)) | |
505 | (n-slice 0) | |
506 | slice) | |
507 | (setq fingerprint (string-to-list fingerprint)) | |
508 | (while fingerprint | |
509 | (setq fpr-length (- fpr-length 4)) | |
510 | (setq slice (butlast fingerprint fpr-length)) | |
511 | (setq fingerprint (nthcdr 4 fingerprint)) | |
512 | (setq n-slice (1+ n-slice)) | |
513 | (setq result | |
514 | (concat | |
515 | result | |
516 | (case n-slice | |
517 | (1 slice) | |
518 | (otherwise (concat " " slice)))))) | |
519 | result)) | |
520 | ||
521 | (defun mml2015-gpg-extract-signature-details () | |
522 | (goto-char (point-min)) | |
523 | (let* ((expired (re-search-forward | |
524 | "^\\[GNUPG:\\] SIGEXPIRED$" | |
525 | nil t)) | |
526 | (signer (and (re-search-forward | |
527 | "^\\[GNUPG:\\] GOODSIG \\([0-9A-Za-z]*\\) \\(.*\\)$" | |
528 | nil t) | |
529 | (cons (match-string 1) (match-string 2)))) | |
530 | (fprint (and (re-search-forward | |
531 | "^\\[GNUPG:\\] VALIDSIG \\([0-9a-zA-Z]*\\) " | |
532 | nil t) | |
533 | (match-string 1))) | |
534 | (trust (and (re-search-forward | |
535 | "^\\[GNUPG:\\] \\(TRUST_.*\\)$" | |
536 | nil t) | |
537 | (match-string 1))) | |
538 | (trust-good-enough-p | |
539 | (cdr (assoc trust mml2015-unabbrev-trust-alist)))) | |
540 | (cond ((and signer fprint) | |
541 | (concat (cdr signer) | |
542 | (unless trust-good-enough-p | |
543 | (concat "\nUntrusted, Fingerprint: " | |
544 | (mml2015-gpg-pretty-print-fpr fprint))) | |
545 | (when expired | |
546 | (format "\nWARNING: Signature from expired key (%s)" | |
547 | (car signer))))) | |
548 | ((re-search-forward | |
549 | "^\\(gpg: \\)?Good signature from \"\\(.*\\)\"$" nil t) | |
550 | (match-string 2)) | |
551 | (t | |
552 | "From unknown user")))) | |
553 | ||
554 | (defun mml2015-gpg-verify (handle ctl) | |
555 | (catch 'error | |
556 | (let (part message signature info-is-set-p) | |
557 | (unless (setq part (mm-find-raw-part-by-type | |
558 | ctl (or (mm-handle-multipart-ctl-parameter | |
559 | ctl 'protocol) | |
560 | "application/pgp-signature") | |
561 | t)) | |
562 | (mm-set-handle-multipart-parameter | |
563 | mm-security-handle 'gnus-info "Corrupted") | |
564 | (throw 'error handle)) | |
565 | (with-temp-buffer | |
566 | (setq message (current-buffer)) | |
567 | (insert part) | |
01c52d31 MB |
568 | ;; Convert <LF> to <CR><LF> in signed text. If --textmode is |
569 | ;; specified when signing, the conversion is not necessary. | |
23f87bed MB |
570 | (goto-char (point-min)) |
571 | (end-of-line) | |
572 | (while (not (eobp)) | |
573 | (unless (eq (char-before) ?\r) | |
574 | (insert "\r")) | |
575 | (forward-line) | |
576 | (end-of-line)) | |
577 | (with-temp-buffer | |
578 | (setq signature (current-buffer)) | |
579 | (unless (setq part (mm-find-part-by-type | |
580 | (cdr handle) "application/pgp-signature" nil t)) | |
581 | (mm-set-handle-multipart-parameter | |
582 | mm-security-handle 'gnus-info "Corrupted") | |
583 | (throw 'error handle)) | |
584 | (mm-insert-part part) | |
585 | (unless (condition-case err | |
586 | (prog1 | |
587 | (gpg-verify message signature mml2015-result-buffer) | |
588 | (mm-set-handle-multipart-parameter | |
589 | mm-security-handle 'gnus-details | |
590 | (with-current-buffer mml2015-result-buffer | |
591 | (buffer-string)))) | |
592 | (error | |
593 | (mm-set-handle-multipart-parameter | |
594 | mm-security-handle 'gnus-details (mml2015-format-error err)) | |
595 | (mm-set-handle-multipart-parameter | |
596 | mm-security-handle 'gnus-info "Error.") | |
597 | (setq info-is-set-p t) | |
598 | nil) | |
599 | (quit | |
600 | (mm-set-handle-multipart-parameter | |
601 | mm-security-handle 'gnus-details "Quit.") | |
602 | (mm-set-handle-multipart-parameter | |
603 | mm-security-handle 'gnus-info "Quit.") | |
604 | (setq info-is-set-p t) | |
605 | nil)) | |
606 | (unless info-is-set-p | |
607 | (mm-set-handle-multipart-parameter | |
608 | mm-security-handle 'gnus-info "Failed")) | |
609 | (throw 'error handle))) | |
610 | (mm-set-handle-multipart-parameter | |
611 | mm-security-handle 'gnus-info | |
612 | (with-current-buffer mml2015-result-buffer | |
613 | (mml2015-gpg-extract-signature-details)))) | |
614 | handle))) | |
615 | ||
616 | (defun mml2015-gpg-clear-verify () | |
617 | (if (condition-case err | |
618 | (prog1 | |
619 | (gpg-verify-cleartext (current-buffer) mml2015-result-buffer) | |
620 | (mm-set-handle-multipart-parameter | |
621 | mm-security-handle 'gnus-details | |
622 | (with-current-buffer mml2015-result-buffer | |
623 | (buffer-string)))) | |
624 | (error | |
625 | (mm-set-handle-multipart-parameter | |
626 | mm-security-handle 'gnus-details (mml2015-format-error err)) | |
627 | nil) | |
628 | (quit | |
629 | (mm-set-handle-multipart-parameter | |
630 | mm-security-handle 'gnus-details "Quit.") | |
631 | nil)) | |
632 | (mm-set-handle-multipart-parameter | |
633 | mm-security-handle 'gnus-info | |
634 | (with-current-buffer mml2015-result-buffer | |
635 | (mml2015-gpg-extract-signature-details))) | |
636 | (mm-set-handle-multipart-parameter | |
01c52d31 MB |
637 | mm-security-handle 'gnus-info "Failed")) |
638 | (mml2015-extract-cleartext-signature)) | |
23f87bed MB |
639 | |
640 | (defun mml2015-gpg-sign (cont) | |
641 | (let ((boundary (mml-compute-boundary cont)) | |
642 | (text (current-buffer)) signature) | |
643 | (goto-char (point-max)) | |
644 | (unless (bolp) | |
645 | (insert "\n")) | |
646 | (with-temp-buffer | |
647 | (unless (gpg-sign-detached text (setq signature (current-buffer)) | |
648 | mml2015-result-buffer | |
649 | nil | |
650 | (message-options-get 'message-sender) | |
651 | t t) ; armor & textmode | |
652 | (unless (> (point-max) (point-min)) | |
653 | (pop-to-buffer mml2015-result-buffer) | |
654 | (error "Sign error"))) | |
655 | (goto-char (point-min)) | |
656 | (while (re-search-forward "\r+$" nil t) | |
657 | (replace-match "" t t)) | |
658 | (set-buffer text) | |
659 | (goto-char (point-min)) | |
660 | (insert (format "Content-Type: multipart/signed; boundary=\"%s\";\n" | |
661 | boundary)) | |
662 | ;;; FIXME: what is the micalg? | |
663 | (insert "\tmicalg=pgp-sha1; protocol=\"application/pgp-signature\"\n") | |
664 | (insert (format "\n--%s\n" boundary)) | |
665 | (goto-char (point-max)) | |
666 | (insert (format "\n--%s\n" boundary)) | |
667 | (insert "Content-Type: application/pgp-signature\n\n") | |
668 | (insert-buffer-substring signature) | |
669 | (goto-char (point-max)) | |
670 | (insert (format "--%s--\n" boundary)) | |
671 | (goto-char (point-max))))) | |
672 | ||
673 | (defun mml2015-gpg-encrypt (cont &optional sign) | |
674 | (let ((boundary (mml-compute-boundary cont)) | |
675 | (text (current-buffer)) | |
676 | cipher) | |
677 | (mm-with-unibyte-current-buffer | |
678 | (with-temp-buffer | |
679 | ;; set up a function to call the correct gpg encrypt routine | |
680 | ;; with the right arguments. (FIXME: this should be done | |
681 | ;; differently.) | |
bf247b6e | 682 | (flet ((gpg-encrypt-func |
23f87bed MB |
683 | (sign plaintext ciphertext result recipients &optional |
684 | passphrase sign-with-key armor textmode) | |
685 | (if sign | |
686 | (gpg-sign-encrypt | |
687 | plaintext ciphertext result recipients passphrase | |
688 | sign-with-key armor textmode) | |
689 | (gpg-encrypt | |
690 | plaintext ciphertext result recipients passphrase | |
691 | armor textmode)))) | |
692 | (unless (gpg-encrypt-func | |
693 | sign ; passed in when using signencrypt | |
694 | text (setq cipher (current-buffer)) | |
695 | mml2015-result-buffer | |
696 | (split-string | |
697 | (or | |
698 | (message-options-get 'message-recipients) | |
699 | (message-options-set 'message-recipients | |
700 | (read-string "Recipients: "))) | |
701 | "[ \f\t\n\r\v,]+") | |
702 | nil | |
703 | (message-options-get 'message-sender) | |
704 | t t) ; armor & textmode | |
705 | (unless (> (point-max) (point-min)) | |
706 | (pop-to-buffer mml2015-result-buffer) | |
707 | (error "Encrypt error")))) | |
708 | (goto-char (point-min)) | |
709 | (while (re-search-forward "\r+$" nil t) | |
710 | (replace-match "" t t)) | |
711 | (set-buffer text) | |
712 | (delete-region (point-min) (point-max)) | |
713 | (insert (format "Content-Type: multipart/encrypted; boundary=\"%s\";\n" | |
714 | boundary)) | |
715 | (insert "\tprotocol=\"application/pgp-encrypted\"\n\n") | |
716 | (insert (format "--%s\n" boundary)) | |
717 | (insert "Content-Type: application/pgp-encrypted\n\n") | |
718 | (insert "Version: 1\n\n") | |
719 | (insert (format "--%s\n" boundary)) | |
720 | (insert "Content-Type: application/octet-stream\n\n") | |
721 | (insert-buffer-substring cipher) | |
722 | (goto-char (point-max)) | |
723 | (insert (format "--%s--\n" boundary)) | |
724 | (goto-char (point-max)))))) | |
725 | ||
726 | ;;; pgg wrapper | |
727 | ||
9efa445f DN |
728 | (defvar pgg-default-user-id) |
729 | (defvar pgg-errors-buffer) | |
730 | (defvar pgg-output-buffer) | |
23f87bed | 731 | |
8abf1b22 GM |
732 | (autoload 'pgg-decrypt-region "pgg") |
733 | (autoload 'pgg-verify-region "pgg") | |
734 | (autoload 'pgg-sign-region "pgg") | |
735 | (autoload 'pgg-encrypt-region "pgg") | |
736 | (autoload 'pgg-parse-armor "pgg-parse") | |
23f87bed MB |
737 | |
738 | (defun mml2015-pgg-decrypt (handle ctl) | |
739 | (catch 'error | |
740 | (let ((pgg-errors-buffer mml2015-result-buffer) | |
741 | child handles result decrypt-status) | |
742 | (unless (setq child (mm-find-part-by-type | |
743 | (cdr handle) | |
744 | "application/octet-stream" nil t)) | |
745 | (mm-set-handle-multipart-parameter | |
746 | mm-security-handle 'gnus-info "Corrupted") | |
747 | (throw 'error handle)) | |
748 | (with-temp-buffer | |
749 | (mm-insert-part child) | |
750 | (if (condition-case err | |
751 | (prog1 | |
752 | (pgg-decrypt-region (point-min) (point-max)) | |
bf247b6e | 753 | (setq decrypt-status |
23f87bed MB |
754 | (with-current-buffer mml2015-result-buffer |
755 | (buffer-string))) | |
756 | (mm-set-handle-multipart-parameter | |
757 | mm-security-handle 'gnus-details | |
758 | decrypt-status)) | |
759 | (error | |
760 | (mm-set-handle-multipart-parameter | |
761 | mm-security-handle 'gnus-details (mml2015-format-error err)) | |
762 | nil) | |
763 | (quit | |
764 | (mm-set-handle-multipart-parameter | |
765 | mm-security-handle 'gnus-details "Quit.") | |
766 | nil)) | |
767 | (with-current-buffer pgg-output-buffer | |
768 | (goto-char (point-min)) | |
769 | (while (search-forward "\r\n" nil t) | |
770 | (replace-match "\n" t t)) | |
771 | (setq handles (mm-dissect-buffer t)) | |
772 | (mm-destroy-parts handle) | |
773 | (mm-set-handle-multipart-parameter | |
774 | mm-security-handle 'gnus-info "OK") | |
775 | (mm-set-handle-multipart-parameter | |
776 | mm-security-handle 'gnus-details | |
777 | (concat decrypt-status | |
778 | (when (stringp (car handles)) | |
779 | "\n" (mm-handle-multipart-ctl-parameter | |
780 | handles 'gnus-details)))) | |
781 | (if (listp (car handles)) | |
782 | handles | |
783 | (list handles))) | |
784 | (mm-set-handle-multipart-parameter | |
785 | mm-security-handle 'gnus-info "Failed") | |
786 | (throw 'error handle)))))) | |
787 | ||
788 | (defun mml2015-pgg-clear-decrypt () | |
789 | (let ((pgg-errors-buffer mml2015-result-buffer)) | |
790 | (if (prog1 | |
791 | (pgg-decrypt-region (point-min) (point-max)) | |
792 | (mm-set-handle-multipart-parameter | |
793 | mm-security-handle 'gnus-details | |
794 | (with-current-buffer mml2015-result-buffer | |
795 | (buffer-string)))) | |
796 | (progn | |
797 | (erase-buffer) | |
9606f1cb MB |
798 | ;; Treat data which pgg returns as a unibyte string. |
799 | (mm-disable-multibyte) | |
23f87bed MB |
800 | (insert-buffer-substring pgg-output-buffer) |
801 | (goto-char (point-min)) | |
802 | (while (search-forward "\r\n" nil t) | |
803 | (replace-match "\n" t t)) | |
804 | (mm-set-handle-multipart-parameter | |
805 | mm-security-handle 'gnus-info "OK")) | |
806 | (mm-set-handle-multipart-parameter | |
807 | mm-security-handle 'gnus-info "Failed")))) | |
808 | ||
809 | (defun mml2015-pgg-verify (handle ctl) | |
810 | (let ((pgg-errors-buffer mml2015-result-buffer) | |
811 | signature-file part signature) | |
812 | (if (or (null (setq part (mm-find-raw-part-by-type | |
813 | ctl (or (mm-handle-multipart-ctl-parameter | |
814 | ctl 'protocol) | |
815 | "application/pgp-signature") | |
816 | t))) | |
817 | (null (setq signature (mm-find-part-by-type | |
818 | (cdr handle) "application/pgp-signature" nil t)))) | |
819 | (progn | |
820 | (mm-set-handle-multipart-parameter | |
821 | mm-security-handle 'gnus-info "Corrupted") | |
822 | handle) | |
823 | (with-temp-buffer | |
824 | (insert part) | |
01c52d31 MB |
825 | ;; Convert <LF> to <CR><LF> in signed text. If --textmode is |
826 | ;; specified when signing, the conversion is not necessary. | |
23f87bed MB |
827 | (goto-char (point-min)) |
828 | (end-of-line) | |
829 | (while (not (eobp)) | |
830 | (unless (eq (char-before) ?\r) | |
831 | (insert "\r")) | |
832 | (forward-line) | |
833 | (end-of-line)) | |
834 | (with-temp-file (setq signature-file (mm-make-temp-file "pgg")) | |
835 | (mm-insert-part signature)) | |
836 | (if (condition-case err | |
837 | (prog1 | |
bf247b6e | 838 | (pgg-verify-region (point-min) (point-max) |
23f87bed MB |
839 | signature-file t) |
840 | (goto-char (point-min)) | |
841 | (while (search-forward "\r\n" nil t) | |
842 | (replace-match "\n" t t)) | |
843 | (mm-set-handle-multipart-parameter | |
844 | mm-security-handle 'gnus-details | |
845 | (concat (with-current-buffer pgg-output-buffer | |
846 | (buffer-string)) | |
847 | (with-current-buffer pgg-errors-buffer | |
848 | (buffer-string))))) | |
849 | (error | |
850 | (mm-set-handle-multipart-parameter | |
851 | mm-security-handle 'gnus-details (mml2015-format-error err)) | |
852 | nil) | |
853 | (quit | |
854 | (mm-set-handle-multipart-parameter | |
855 | mm-security-handle 'gnus-details "Quit.") | |
856 | nil)) | |
857 | (progn | |
858 | (delete-file signature-file) | |
859 | (mm-set-handle-multipart-parameter | |
860 | mm-security-handle 'gnus-info | |
861 | (with-current-buffer pgg-errors-buffer | |
862 | (mml2015-gpg-extract-signature-details)))) | |
863 | (delete-file signature-file) | |
864 | (mm-set-handle-multipart-parameter | |
865 | mm-security-handle 'gnus-info "Failed"))))) | |
866 | handle) | |
867 | ||
868 | (defun mml2015-pgg-clear-verify () | |
869 | (let ((pgg-errors-buffer mml2015-result-buffer) | |
870 | (text (buffer-string)) | |
871 | (coding-system buffer-file-coding-system)) | |
872 | (if (condition-case err | |
873 | (prog1 | |
874 | (mm-with-unibyte-buffer | |
5538c331 | 875 | (insert (mm-encode-coding-string text coding-system)) |
23f87bed MB |
876 | (pgg-verify-region (point-min) (point-max) nil t)) |
877 | (goto-char (point-min)) | |
878 | (while (search-forward "\r\n" nil t) | |
879 | (replace-match "\n" t t)) | |
880 | (mm-set-handle-multipart-parameter | |
881 | mm-security-handle 'gnus-details | |
882 | (concat (with-current-buffer pgg-output-buffer | |
883 | (buffer-string)) | |
884 | (with-current-buffer pgg-errors-buffer | |
885 | (buffer-string))))) | |
886 | (error | |
887 | (mm-set-handle-multipart-parameter | |
888 | mm-security-handle 'gnus-details (mml2015-format-error err)) | |
889 | nil) | |
890 | (quit | |
891 | (mm-set-handle-multipart-parameter | |
892 | mm-security-handle 'gnus-details "Quit.") | |
893 | nil)) | |
894 | (mm-set-handle-multipart-parameter | |
895 | mm-security-handle 'gnus-info | |
896 | (with-current-buffer pgg-errors-buffer | |
897 | (mml2015-gpg-extract-signature-details))) | |
898 | (mm-set-handle-multipart-parameter | |
01c52d31 MB |
899 | mm-security-handle 'gnus-info "Failed"))) |
900 | (mml2015-extract-cleartext-signature)) | |
23f87bed MB |
901 | |
902 | (defun mml2015-pgg-sign (cont) | |
903 | (let ((pgg-errors-buffer mml2015-result-buffer) | |
904 | (boundary (mml-compute-boundary cont)) | |
905 | (pgg-default-user-id (or (message-options-get 'mml-sender) | |
bcc7dd61 | 906 | pgg-default-user-id)) |
34128042 | 907 | (pgg-text-mode t) |
bcc7dd61 | 908 | entry) |
23f87bed MB |
909 | (unless (pgg-sign-region (point-min) (point-max)) |
910 | (pop-to-buffer mml2015-result-buffer) | |
911 | (error "Sign error")) | |
912 | (goto-char (point-min)) | |
913 | (insert (format "Content-Type: multipart/signed; boundary=\"%s\";\n" | |
914 | boundary)) | |
bcc7dd61 MB |
915 | (if (setq entry (assq 2 (pgg-parse-armor |
916 | (with-current-buffer pgg-output-buffer | |
917 | (buffer-string))))) | |
918 | (setq entry (assq 'hash-algorithm (cdr entry)))) | |
919 | (insert (format "\tmicalg=%s; " | |
920 | (if (cdr entry) | |
921 | (downcase (format "pgp-%s" (cdr entry))) | |
922 | "pgp-sha1"))) | |
923 | (insert "protocol=\"application/pgp-signature\"\n") | |
23f87bed MB |
924 | (insert (format "\n--%s\n" boundary)) |
925 | (goto-char (point-max)) | |
926 | (insert (format "\n--%s\n" boundary)) | |
927 | (insert "Content-Type: application/pgp-signature\n\n") | |
928 | (insert-buffer-substring pgg-output-buffer) | |
929 | (goto-char (point-max)) | |
930 | (insert (format "--%s--\n" boundary)) | |
931 | (goto-char (point-max)))) | |
932 | ||
933 | (defun mml2015-pgg-encrypt (cont &optional sign) | |
934 | (let ((pgg-errors-buffer mml2015-result-buffer) | |
34128042 | 935 | (pgg-text-mode t) |
23f87bed MB |
936 | (boundary (mml-compute-boundary cont))) |
937 | (unless (pgg-encrypt-region (point-min) (point-max) | |
938 | (split-string | |
939 | (or | |
940 | (message-options-get 'message-recipients) | |
941 | (message-options-set 'message-recipients | |
942 | (read-string "Recipients: "))) | |
943 | "[ \f\t\n\r\v,]+") | |
944 | sign) | |
945 | (pop-to-buffer mml2015-result-buffer) | |
946 | (error "Encrypt error")) | |
947 | (delete-region (point-min) (point-max)) | |
948 | (goto-char (point-min)) | |
949 | (insert (format "Content-Type: multipart/encrypted; boundary=\"%s\";\n" | |
950 | boundary)) | |
951 | (insert "\tprotocol=\"application/pgp-encrypted\"\n\n") | |
952 | (insert (format "--%s\n" boundary)) | |
953 | (insert "Content-Type: application/pgp-encrypted\n\n") | |
954 | (insert "Version: 1\n\n") | |
955 | (insert (format "--%s\n" boundary)) | |
956 | (insert "Content-Type: application/octet-stream\n\n") | |
957 | (insert-buffer-substring pgg-output-buffer) | |
958 | (goto-char (point-max)) | |
959 | (insert (format "--%s--\n" boundary)) | |
960 | (goto-char (point-max)))) | |
961 | ||
01c52d31 MB |
962 | ;;; epg wrapper |
963 | ||
9efa445f DN |
964 | (defvar epg-user-id-alist) |
965 | (defvar epg-digest-algorithm-alist) | |
966 | (defvar inhibit-redisplay) | |
01c52d31 | 967 | |
8abf1b22 GM |
968 | (autoload 'epg-make-context "epg") |
969 | (autoload 'epg-context-set-armor "epg") | |
970 | (autoload 'epg-context-set-textmode "epg") | |
971 | (autoload 'epg-context-set-signers "epg") | |
972 | (autoload 'epg-context-result-for "epg") | |
973 | (autoload 'epg-new-signature-digest-algorithm "epg") | |
974 | (autoload 'epg-verify-result-to-string "epg") | |
975 | (autoload 'epg-list-keys "epg") | |
976 | (autoload 'epg-decrypt-string "epg") | |
977 | (autoload 'epg-verify-string "epg") | |
978 | (autoload 'epg-sign-string "epg") | |
979 | (autoload 'epg-encrypt-string "epg") | |
980 | (autoload 'epg-passphrase-callback-function "epg") | |
981 | (autoload 'epg-context-set-passphrase-callback "epg") | |
982 | (autoload 'epg-key-sub-key-list "epg") | |
983 | (autoload 'epg-sub-key-capability "epg") | |
984 | (autoload 'epg-sub-key-validity "epg") | |
985 | (autoload 'epg-configuration "epg-config") | |
986 | (autoload 'epg-expand-group "epg-config") | |
987 | (autoload 'epa-select-keys "epa") | |
01c52d31 | 988 | |
9efa445f DN |
989 | (defvar password-cache-expiry) |
990 | ||
01c52d31 MB |
991 | (defvar mml2015-epg-secret-key-id-list nil) |
992 | ||
993 | (defun mml2015-epg-passphrase-callback (context key-id ignore) | |
994 | (if (eq key-id 'SYM) | |
995 | (epg-passphrase-callback-function context key-id nil) | |
9b3ebcb6 MB |
996 | (let* ((password-cache-key-id |
997 | (if (eq key-id 'PIN) | |
998 | "PIN" | |
999 | key-id)) | |
1000 | entry | |
01c52d31 MB |
1001 | (passphrase |
1002 | (password-read | |
1003 | (if (eq key-id 'PIN) | |
1004 | "Passphrase for PIN: " | |
1005 | (if (setq entry (assoc key-id epg-user-id-alist)) | |
1006 | (format "Passphrase for %s %s: " key-id (cdr entry)) | |
1007 | (format "Passphrase for %s: " key-id))) | |
9b3ebcb6 | 1008 | password-cache-key-id))) |
01c52d31 MB |
1009 | (when passphrase |
1010 | (let ((password-cache-expiry mml2015-passphrase-cache-expiry)) | |
9b3ebcb6 | 1011 | (password-cache-add password-cache-key-id passphrase)) |
01c52d31 | 1012 | (setq mml2015-epg-secret-key-id-list |
9b3ebcb6 | 1013 | (cons password-cache-key-id mml2015-epg-secret-key-id-list)) |
01c52d31 MB |
1014 | (copy-sequence passphrase))))) |
1015 | ||
1016 | (defun mml2015-epg-find-usable-key (keys usage) | |
1017 | (catch 'found | |
1018 | (while keys | |
1019 | (let ((pointer (epg-key-sub-key-list (car keys)))) | |
1020 | (while pointer | |
1021 | (if (and (memq usage (epg-sub-key-capability (car pointer))) | |
1022 | (not (memq (epg-sub-key-validity (car pointer)) | |
1023 | '(revoked expired)))) | |
1024 | (throw 'found (car keys))) | |
1025 | (setq pointer (cdr pointer)))) | |
1026 | (setq keys (cdr keys))))) | |
1027 | ||
1028 | (defun mml2015-epg-decrypt (handle ctl) | |
1029 | (catch 'error | |
1030 | (let ((inhibit-redisplay t) | |
1031 | context plain child handles result decrypt-status) | |
1032 | (unless (setq child (mm-find-part-by-type | |
1033 | (cdr handle) | |
1034 | "application/octet-stream" nil t)) | |
1035 | (mm-set-handle-multipart-parameter | |
1036 | mm-security-handle 'gnus-info "Corrupted") | |
1037 | (throw 'error handle)) | |
1038 | (setq context (epg-make-context)) | |
1039 | (if mml2015-cache-passphrase | |
1040 | (epg-context-set-passphrase-callback | |
1041 | context | |
1042 | #'mml2015-epg-passphrase-callback)) | |
1043 | (condition-case error | |
1044 | (setq plain (epg-decrypt-string context (mm-get-part child)) | |
1045 | mml2015-epg-secret-key-id-list nil) | |
1046 | (error | |
1047 | (while mml2015-epg-secret-key-id-list | |
1048 | (password-cache-remove (car mml2015-epg-secret-key-id-list)) | |
1049 | (setq mml2015-epg-secret-key-id-list | |
1050 | (cdr mml2015-epg-secret-key-id-list))) | |
1051 | (mm-set-handle-multipart-parameter | |
1052 | mm-security-handle 'gnus-info "Failed") | |
1053 | (if (eq (car error) 'quit) | |
1054 | (mm-set-handle-multipart-parameter | |
1055 | mm-security-handle 'gnus-details "Quit.") | |
1056 | (mm-set-handle-multipart-parameter | |
1057 | mm-security-handle 'gnus-details (mml2015-format-error error))) | |
1058 | (throw 'error handle))) | |
1059 | (with-temp-buffer | |
1060 | (insert plain) | |
1061 | (goto-char (point-min)) | |
1062 | (while (search-forward "\r\n" nil t) | |
1063 | (replace-match "\n" t t)) | |
1064 | (setq handles (mm-dissect-buffer t)) | |
1065 | (mm-destroy-parts handle) | |
1066 | (if (epg-context-result-for context 'verify) | |
1067 | (mm-set-handle-multipart-parameter | |
1068 | mm-security-handle 'gnus-info | |
1069 | (concat "OK\n" | |
1070 | (epg-verify-result-to-string | |
1071 | (epg-context-result-for context 'verify)))) | |
1072 | (mm-set-handle-multipart-parameter | |
1073 | mm-security-handle 'gnus-info "OK")) | |
1074 | (if (stringp (car handles)) | |
1075 | (mm-set-handle-multipart-parameter | |
1076 | mm-security-handle 'gnus-details | |
1077 | (mm-handle-multipart-ctl-parameter handles 'gnus-details)))) | |
1078 | (if (listp (car handles)) | |
1079 | handles | |
1080 | (list handles))))) | |
1081 | ||
1082 | (defun mml2015-epg-clear-decrypt () | |
1083 | (let ((inhibit-redisplay t) | |
1084 | (context (epg-make-context)) | |
1085 | plain) | |
1086 | (if mml2015-cache-passphrase | |
1087 | (epg-context-set-passphrase-callback | |
1088 | context | |
1089 | #'mml2015-epg-passphrase-callback)) | |
1090 | (condition-case error | |
1091 | (setq plain (epg-decrypt-string context (buffer-string)) | |
1092 | mml2015-epg-secret-key-id-list nil) | |
1093 | (error | |
1094 | (while mml2015-epg-secret-key-id-list | |
1095 | (password-cache-remove (car mml2015-epg-secret-key-id-list)) | |
1096 | (setq mml2015-epg-secret-key-id-list | |
1097 | (cdr mml2015-epg-secret-key-id-list))) | |
1098 | (mm-set-handle-multipart-parameter | |
1099 | mm-security-handle 'gnus-info "Failed") | |
1100 | (if (eq (car error) 'quit) | |
1101 | (mm-set-handle-multipart-parameter | |
1102 | mm-security-handle 'gnus-details "Quit.") | |
1103 | (mm-set-handle-multipart-parameter | |
1104 | mm-security-handle 'gnus-details (mml2015-format-error error))))) | |
1105 | (when plain | |
1106 | (erase-buffer) | |
1107 | ;; Treat data which epg returns as a unibyte string. | |
1108 | (mm-disable-multibyte) | |
1109 | (insert plain) | |
1110 | (goto-char (point-min)) | |
1111 | (while (search-forward "\r\n" nil t) | |
1112 | (replace-match "\n" t t)) | |
1113 | (mm-set-handle-multipart-parameter | |
1114 | mm-security-handle 'gnus-info "OK") | |
1115 | (if (epg-context-result-for context 'verify) | |
1116 | (mm-set-handle-multipart-parameter | |
1117 | mm-security-handle 'gnus-details | |
1118 | (epg-verify-result-to-string | |
1119 | (epg-context-result-for context 'verify))))))) | |
1120 | ||
1121 | (defun mml2015-epg-verify (handle ctl) | |
1122 | (catch 'error | |
1123 | (let ((inhibit-redisplay t) | |
1124 | context plain signature-file part signature) | |
1125 | (when (or (null (setq part (mm-find-raw-part-by-type | |
1126 | ctl (or (mm-handle-multipart-ctl-parameter | |
1127 | ctl 'protocol) | |
1128 | "application/pgp-signature") | |
1129 | t))) | |
1130 | (null (setq signature (mm-find-part-by-type | |
1131 | (cdr handle) "application/pgp-signature" | |
1132 | nil t)))) | |
1133 | (mm-set-handle-multipart-parameter | |
1134 | mm-security-handle 'gnus-info "Corrupted") | |
1135 | (throw 'error handle)) | |
1136 | (setq part (mm-replace-in-string part "\n" "\r\n" t) | |
1137 | signature (mm-get-part signature) | |
1138 | context (epg-make-context)) | |
1139 | (condition-case error | |
1140 | (setq plain (epg-verify-string context signature part)) | |
1141 | (error | |
1142 | (mm-set-handle-multipart-parameter | |
1143 | mm-security-handle 'gnus-info "Failed") | |
1144 | (if (eq (car error) 'quit) | |
1145 | (mm-set-handle-multipart-parameter | |
1146 | mm-security-handle 'gnus-details "Quit.") | |
1147 | (mm-set-handle-multipart-parameter | |
1148 | mm-security-handle 'gnus-details (mml2015-format-error error))) | |
1149 | (throw 'error handle))) | |
1150 | (mm-set-handle-multipart-parameter | |
1151 | mm-security-handle 'gnus-info | |
1152 | (epg-verify-result-to-string (epg-context-result-for context 'verify))) | |
1153 | handle))) | |
1154 | ||
1155 | (defun mml2015-epg-clear-verify () | |
1156 | (let ((inhibit-redisplay t) | |
1157 | (context (epg-make-context)) | |
1158 | (signature (mm-encode-coding-string (buffer-string) | |
1159 | coding-system-for-write)) | |
1160 | plain) | |
1161 | (condition-case error | |
1162 | (setq plain (epg-verify-string context signature)) | |
1163 | (error | |
1164 | (mm-set-handle-multipart-parameter | |
1165 | mm-security-handle 'gnus-info "Failed") | |
1166 | (if (eq (car error) 'quit) | |
1167 | (mm-set-handle-multipart-parameter | |
1168 | mm-security-handle 'gnus-details "Quit.") | |
1169 | (mm-set-handle-multipart-parameter | |
1170 | mm-security-handle 'gnus-details (mml2015-format-error error))))) | |
1171 | (if plain | |
1172 | (progn | |
1173 | (mm-set-handle-multipart-parameter | |
1174 | mm-security-handle 'gnus-info | |
1175 | (epg-verify-result-to-string | |
1176 | (epg-context-result-for context 'verify))) | |
1177 | (delete-region (point-min) (point-max)) | |
1178 | (insert (mm-decode-coding-string plain coding-system-for-read))) | |
1179 | (mml2015-extract-cleartext-signature)))) | |
1180 | ||
1181 | (defun mml2015-epg-sign (cont) | |
1182 | (let* ((inhibit-redisplay t) | |
1183 | (context (epg-make-context)) | |
1184 | (boundary (mml-compute-boundary cont)) | |
1185 | signer-key | |
1186 | (signers | |
1187 | (or (message-options-get 'mml2015-epg-signers) | |
1188 | (message-options-set | |
1189 | 'mml2015-epg-signers | |
54c72c31 | 1190 | (if (eq mm-sign-option 'guided) |
01c52d31 MB |
1191 | (epa-select-keys context "\ |
1192 | Select keys for signing. | |
1193 | If no one is selected, default secret key is used. " | |
1194 | mml2015-signers t) | |
1195 | (if mml2015-signers | |
52bec650 MB |
1196 | (delq nil |
1197 | (mapcar | |
1198 | (lambda (signer) | |
1199 | (setq signer-key (mml2015-epg-find-usable-key | |
1200 | (epg-list-keys context signer t) | |
1201 | 'sign)) | |
1202 | (unless (or signer-key | |
1203 | (y-or-n-p | |
1204 | (format | |
1205 | "No secret key for %s; skip it? " | |
1206 | signer))) | |
1207 | (error "No secret key for %s" signer)) | |
1208 | signer-key) | |
1209 | mml2015-signers))))))) | |
01c52d31 MB |
1210 | signature micalg) |
1211 | (epg-context-set-armor context t) | |
1212 | (epg-context-set-textmode context t) | |
1213 | (epg-context-set-signers context signers) | |
1214 | (if mml2015-cache-passphrase | |
1215 | (epg-context-set-passphrase-callback | |
1216 | context | |
1217 | #'mml2015-epg-passphrase-callback)) | |
1218 | (condition-case error | |
1219 | (setq signature (epg-sign-string context (buffer-string) t) | |
1220 | mml2015-epg-secret-key-id-list nil) | |
1221 | (error | |
1222 | (while mml2015-epg-secret-key-id-list | |
1223 | (password-cache-remove (car mml2015-epg-secret-key-id-list)) | |
1224 | (setq mml2015-epg-secret-key-id-list | |
1225 | (cdr mml2015-epg-secret-key-id-list))) | |
1226 | (signal (car error) (cdr error)))) | |
1227 | (if (epg-context-result-for context 'sign) | |
1228 | (setq micalg (epg-new-signature-digest-algorithm | |
1229 | (car (epg-context-result-for context 'sign))))) | |
1230 | (goto-char (point-min)) | |
1231 | (insert (format "Content-Type: multipart/signed; boundary=\"%s\";\n" | |
1232 | boundary)) | |
1233 | (if micalg | |
1234 | (insert (format "\tmicalg=pgp-%s; " | |
1235 | (downcase | |
1236 | (cdr (assq micalg | |
1237 | epg-digest-algorithm-alist)))))) | |
1238 | (insert "protocol=\"application/pgp-signature\"\n") | |
1239 | (insert (format "\n--%s\n" boundary)) | |
1240 | (goto-char (point-max)) | |
1241 | (insert (format "\n--%s\n" boundary)) | |
1242 | (insert "Content-Type: application/pgp-signature\n\n") | |
1243 | (insert signature) | |
1244 | (goto-char (point-max)) | |
1245 | (insert (format "--%s--\n" boundary)) | |
1246 | (goto-char (point-max)))) | |
1247 | ||
1248 | (defun mml2015-epg-encrypt (cont &optional sign) | |
1249 | (let ((inhibit-redisplay t) | |
1250 | (context (epg-make-context)) | |
1251 | (config (epg-configuration)) | |
1252 | (recipients (message-options-get 'mml2015-epg-recipients)) | |
1253 | cipher signers | |
1254 | (boundary (mml-compute-boundary cont)) | |
1255 | recipient-key signer-key) | |
1256 | (unless recipients | |
1257 | (setq recipients | |
1258 | (apply #'nconc | |
1259 | (mapcar | |
1260 | (lambda (recipient) | |
1261 | (or (epg-expand-group config recipient) | |
1262 | (list (concat "<" recipient ">")))) | |
1263 | (split-string | |
1264 | (or (message-options-get 'message-recipients) | |
1265 | (message-options-set 'message-recipients | |
1266 | (read-string "Recipients: "))) | |
1267 | "[ \f\t\n\r\v,]+")))) | |
1268 | (when mml2015-encrypt-to-self | |
1269 | (unless mml2015-signers | |
1270 | (error "mml2015-signers not set")) | |
1271 | (setq recipients (nconc recipients mml2015-signers))) | |
54c72c31 | 1272 | (if (eq mm-encrypt-option 'guided) |
01c52d31 MB |
1273 | (setq recipients |
1274 | (epa-select-keys context "\ | |
1275 | Select recipients for encryption. | |
1276 | If no one is selected, symmetric encryption will be performed. " | |
1277 | recipients)) | |
1278 | (setq recipients | |
52bec650 MB |
1279 | (delq nil |
1280 | (mapcar | |
1281 | (lambda (recipient) | |
1282 | (setq recipient-key (mml2015-epg-find-usable-key | |
1283 | (epg-list-keys context recipient) | |
1284 | 'encrypt)) | |
1285 | (unless (or recipient-key | |
1286 | (y-or-n-p | |
1287 | (format "No public key for %s; skip it? " | |
1288 | recipient))) | |
1289 | (error "No public key for %s" recipient)) | |
1290 | recipient-key) | |
1291 | recipients))) | |
01c52d31 MB |
1292 | (unless recipients |
1293 | (error "No recipient specified"))) | |
1294 | (message-options-set 'mml2015-epg-recipients recipients)) | |
1295 | (when sign | |
1296 | (setq signers | |
1297 | (or (message-options-get 'mml2015-epg-signers) | |
1298 | (message-options-set | |
1299 | 'mml2015-epg-signers | |
54c72c31 | 1300 | (if (eq mm-sign-option 'guided) |
01c52d31 MB |
1301 | (epa-select-keys context "\ |
1302 | Select keys for signing. | |
1303 | If no one is selected, default secret key is used. " | |
1304 | mml2015-signers t) | |
1305 | (if mml2015-signers | |
52bec650 MB |
1306 | (delq nil |
1307 | (mapcar | |
1308 | (lambda (signer) | |
1309 | (setq signer-key (mml2015-epg-find-usable-key | |
1310 | (epg-list-keys context signer t) | |
1311 | 'sign)) | |
1312 | (unless (or signer-key | |
1313 | (y-or-n-p | |
1314 | (format | |
1315 | "No secret key for %s; skip it? " | |
1316 | signer))) | |
1317 | (error "No secret key for %s" signer)) | |
1318 | signer-key) | |
1319 | mml2015-signers))))))) | |
01c52d31 MB |
1320 | (epg-context-set-signers context signers)) |
1321 | (epg-context-set-armor context t) | |
1322 | (epg-context-set-textmode context t) | |
1323 | (if mml2015-cache-passphrase | |
1324 | (epg-context-set-passphrase-callback | |
1325 | context | |
1326 | #'mml2015-epg-passphrase-callback)) | |
1327 | (condition-case error | |
1328 | (setq cipher | |
1329 | (epg-encrypt-string context (buffer-string) recipients sign | |
1330 | mml2015-always-trust) | |
1331 | mml2015-epg-secret-key-id-list nil) | |
1332 | (error | |
1333 | (while mml2015-epg-secret-key-id-list | |
1334 | (password-cache-remove (car mml2015-epg-secret-key-id-list)) | |
1335 | (setq mml2015-epg-secret-key-id-list | |
1336 | (cdr mml2015-epg-secret-key-id-list))) | |
1337 | (signal (car error) (cdr error)))) | |
1338 | (delete-region (point-min) (point-max)) | |
1339 | (goto-char (point-min)) | |
1340 | (insert (format "Content-Type: multipart/encrypted; boundary=\"%s\";\n" | |
1341 | boundary)) | |
1342 | (insert "\tprotocol=\"application/pgp-encrypted\"\n\n") | |
1343 | (insert (format "--%s\n" boundary)) | |
1344 | (insert "Content-Type: application/pgp-encrypted\n\n") | |
1345 | (insert "Version: 1\n\n") | |
1346 | (insert (format "--%s\n" boundary)) | |
1347 | (insert "Content-Type: application/octet-stream\n\n") | |
1348 | (insert cipher) | |
1349 | (goto-char (point-max)) | |
1350 | (insert (format "--%s--\n" boundary)) | |
1351 | (goto-char (point-max)))) | |
1352 | ||
23f87bed MB |
1353 | ;;; General wrapper |
1354 | ||
5a12b40c GM |
1355 | (autoload 'gnus-buffer-live-p "gnus-util") |
1356 | (autoload 'gnus-get-buffer-create "gnus") | |
1357 | ||
23f87bed MB |
1358 | (defun mml2015-clean-buffer () |
1359 | (if (gnus-buffer-live-p mml2015-result-buffer) | |
1360 | (with-current-buffer mml2015-result-buffer | |
1361 | (erase-buffer) | |
1362 | t) | |
1363 | (setq mml2015-result-buffer | |
01c52d31 | 1364 | (gnus-get-buffer-create " *MML2015 Result*")) |
23f87bed MB |
1365 | nil)) |
1366 | ||
1367 | (defsubst mml2015-clear-decrypt-function () | |
1368 | (nth 6 (assq mml2015-use mml2015-function-alist))) | |
1369 | ||
1370 | (defsubst mml2015-clear-verify-function () | |
1371 | (nth 5 (assq mml2015-use mml2015-function-alist))) | |
1372 | ||
1373 | ;;;###autoload | |
1374 | (defun mml2015-decrypt (handle ctl) | |
1375 | (mml2015-clean-buffer) | |
1376 | (let ((func (nth 4 (assq mml2015-use mml2015-function-alist)))) | |
1377 | (if func | |
1378 | (funcall func handle ctl) | |
1379 | handle))) | |
1380 | ||
1381 | ;;;###autoload | |
1382 | (defun mml2015-decrypt-test (handle ctl) | |
1383 | mml2015-use) | |
1384 | ||
1385 | ;;;###autoload | |
1386 | (defun mml2015-verify (handle ctl) | |
1387 | (mml2015-clean-buffer) | |
1388 | (let ((func (nth 3 (assq mml2015-use mml2015-function-alist)))) | |
1389 | (if func | |
1390 | (funcall func handle ctl) | |
1391 | handle))) | |
1392 | ||
1393 | ;;;###autoload | |
1394 | (defun mml2015-verify-test (handle ctl) | |
1395 | mml2015-use) | |
1396 | ||
1397 | ;;;###autoload | |
1398 | (defun mml2015-encrypt (cont &optional sign) | |
1399 | (mml2015-clean-buffer) | |
1400 | (let ((func (nth 2 (assq mml2015-use mml2015-function-alist)))) | |
1401 | (if func | |
1402 | (funcall func cont sign) | |
1403 | (error "Cannot find encrypt function")))) | |
1404 | ||
1405 | ;;;###autoload | |
1406 | (defun mml2015-sign (cont) | |
1407 | (mml2015-clean-buffer) | |
1408 | (let ((func (nth 1 (assq mml2015-use mml2015-function-alist)))) | |
1409 | (if func | |
1410 | (funcall func cont) | |
1411 | (error "Cannot find sign function")))) | |
1412 | ||
1413 | ;;;###autoload | |
1414 | (defun mml2015-self-encrypt () | |
1415 | (mml2015-encrypt nil)) | |
1416 | ||
1417 | (provide 'mml2015) | |
1418 | ||
cbee283d | 1419 | ;; arch-tag: b04701d5-0b09-44d8-bed8-de901bf435f2 |
23f87bed | 1420 | ;;; mml2015.el ends here |