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1 | ;;; pgg.el --- glue for the various PGP implementations. |
2 | ||
e84b4b86 | 3 | ;; Copyright (C) 1999, 2000, 2002, 2003, 2004, |
d7a0267c | 4 | ;; 2005, 2006, 2007 Free Software Foundation, Inc. |
23f87bed MB |
5 | |
6 | ;; Author: Daiki Ueno <ueno@unixuser.org> | |
7c700bd1 | 7 | ;; Symmetric encryption added by: Sascha Wilde <wilde@sha-bang.de> |
23f87bed MB |
8 | ;; Created: 1999/10/28 |
9 | ;; Keywords: PGP | |
10 | ||
11 | ;; This file is part of GNU Emacs. | |
12 | ||
13 | ;; GNU Emacs is free software; you can redistribute it and/or modify | |
14 | ;; it under the terms of the GNU General Public License as published by | |
15 | ;; the Free Software Foundation; either version 2, or (at your option) | |
16 | ;; any later version. | |
17 | ||
18 | ;; GNU Emacs is distributed in the hope that it will be useful, | |
19 | ;; but WITHOUT ANY WARRANTY; without even the implied warranty of | |
20 | ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
21 | ;; GNU General Public License for more details. | |
22 | ||
23 | ;; You should have received a copy of the GNU General Public License | |
24 | ;; along with GNU Emacs; see the file COPYING. If not, write to the | |
3a35cf56 LK |
25 | ;; Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, |
26 | ;; Boston, MA 02110-1301, USA. | |
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27 | |
28 | ;;; Commentary: | |
29 | ||
30 | ;;; Code: | |
31 | ||
32 | (require 'pgg-def) | |
33 | (require 'pgg-parse) | |
34 | (autoload 'run-at-time "timer") | |
35 | ||
36 | ;; Don't merge these two `eval-when-compile's. | |
37 | (eval-when-compile | |
38 | (require 'cl)) | |
23f87bed MB |
39 | |
40 | ;;; @ utility functions | |
41 | ;;; | |
42 | ||
23f87bed MB |
43 | (defun pgg-invoke (func scheme &rest args) |
44 | (progn | |
45 | (require (intern (format "pgg-%s" scheme))) | |
46 | (apply 'funcall (intern (format "pgg-%s-%s" scheme func)) args))) | |
47 | ||
48 | (put 'pgg-save-coding-system 'lisp-indent-function 2) | |
49 | ||
50 | (defmacro pgg-save-coding-system (start end &rest body) | |
51 | `(if (interactive-p) | |
52 | (let ((buffer (current-buffer))) | |
53 | (with-temp-buffer | |
54 | (let (buffer-undo-list) | |
55 | (insert-buffer-substring buffer ,start ,end) | |
56 | (encode-coding-region (point-min)(point-max) | |
57 | buffer-file-coding-system) | |
58 | (prog1 (save-excursion ,@body) | |
59 | (push nil buffer-undo-list) | |
60 | (ignore-errors (undo)))))) | |
61 | (save-restriction | |
62 | (narrow-to-region ,start ,end) | |
63 | ,@body))) | |
64 | ||
65 | (defun pgg-temp-buffer-show-function (buffer) | |
66 | (let ((window (or (get-buffer-window buffer 'visible) | |
67 | (split-window-vertically)))) | |
68 | (set-window-buffer window buffer) | |
69 | (shrink-window-if-larger-than-buffer window))) | |
70 | ||
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71 | ;; XXX `pgg-display-output-buffer' is a horrible name for this function. |
72 | ;; It should be something like `pgg-situate-output-or-display-error'. | |
23f87bed | 73 | (defun pgg-display-output-buffer (start end status) |
7c700bd1 EZ |
74 | "Situate en/decryption results or pop up an error buffer. |
75 | ||
76 | Text from START to END is replaced by contents of output buffer if STATUS | |
77 | is true, or else the output buffer is displayed." | |
23f87bed | 78 | (if status |
7c700bd1 EZ |
79 | (pgg-situate-output start end) |
80 | (pgg-display-error-buffer))) | |
81 | ||
82 | (defun pgg-situate-output (start end) | |
83 | "Place en/decryption result in place of current text from START to END." | |
84 | (delete-region start end) | |
85 | (insert-buffer-substring pgg-output-buffer) | |
86 | (decode-coding-region start (point) buffer-file-coding-system)) | |
87 | ||
88 | (defun pgg-display-error-buffer () | |
89 | "Pop up an error buffer indicating the reason for an en/decryption failure." | |
90 | (let ((temp-buffer-show-function | |
91 | (function pgg-temp-buffer-show-function))) | |
92 | (with-output-to-temp-buffer pgg-echo-buffer | |
93 | (set-buffer standard-output) | |
94 | (insert-buffer-substring pgg-errors-buffer)))) | |
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95 | |
96 | (defvar pgg-passphrase-cache (make-vector 7 0)) | |
97 | ||
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98 | (defvar pgg-pending-timers (make-vector 7 0) |
99 | "Hash table for managing scheduled pgg cache management timers. | |
100 | ||
101 | We associate key and timer, so the timer can be cancelled if a new | |
102 | timeout for the key is set while an old one is still pending.") | |
103 | ||
104 | (defun pgg-read-passphrase (prompt &optional key notruncate) | |
105 | "Using PROMPT, obtain passphrase for KEY from cache or user. | |
106 | ||
107 | Truncate the key to 8 trailing characters unless NOTRUNCATE is true | |
108 | \(default false). | |
109 | ||
110 | Custom variables `pgg-cache-passphrase' and `pgg-passphrase-cache-expiry' | |
111 | regulate cache behavior." | |
112 | (or (pgg-read-passphrase-from-cache key notruncate) | |
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113 | (read-passwd prompt))) |
114 | ||
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115 | (defun pgg-read-passphrase-from-cache (key &optional notruncate) |
116 | "Obtain passphrase for KEY from time-limited passphrase cache. | |
117 | ||
118 | Truncate the key to 8 trailing characters unless NOTRUNCATE is true | |
119 | \(default false). | |
120 | ||
121 | Custom variables `pgg-cache-passphrase' and `pgg-passphrase-cache-expiry' | |
122 | regulate cache behavior." | |
123 | (and pgg-cache-passphrase | |
124 | key (or notruncate | |
125 | (setq key (pgg-truncate-key-identifier key))) | |
126 | (symbol-value (intern-soft key pgg-passphrase-cache)))) | |
127 | ||
128 | (defun pgg-add-passphrase-to-cache (key passphrase &optional notruncate) | |
129 | "Associate KEY with PASSPHRASE in time-limited passphrase cache. | |
130 | ||
131 | Truncate the key to 8 trailing characters unless NOTRUNCATE is true | |
132 | \(default false). | |
133 | ||
134 | Custom variables `pgg-cache-passphrase' and `pgg-passphrase-cache-expiry' | |
135 | regulate cache behavior." | |
136 | ||
137 | (let* ((key (if notruncate key (pgg-truncate-key-identifier key))) | |
138 | (interned-timer-key (intern-soft key pgg-pending-timers)) | |
139 | (old-timer (symbol-value interned-timer-key)) | |
140 | new-timer) | |
141 | (when old-timer | |
142 | (cancel-timer old-timer) | |
143 | (unintern interned-timer-key pgg-pending-timers)) | |
144 | (set (intern key pgg-passphrase-cache) | |
145 | passphrase) | |
146 | (set (intern key pgg-pending-timers) | |
147 | (pgg-run-at-time pgg-passphrase-cache-expiry nil | |
148 | #'pgg-remove-passphrase-from-cache | |
149 | key notruncate)))) | |
150 | ||
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151 | (if (fboundp 'clear-string) |
152 | (defalias 'pgg-clear-string 'clear-string) | |
153 | (defun pgg-clear-string (string) | |
154 | (fillarray string ?_))) | |
155 | ||
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156 | (defun pgg-remove-passphrase-from-cache (key &optional notruncate) |
157 | "Omit passphrase associated with KEY in time-limited passphrase cache. | |
158 | ||
159 | Truncate the key to 8 trailing characters unless NOTRUNCATE is true | |
160 | \(default false). | |
161 | ||
162 | This is a no-op if there is not entry for KEY (eg, it's already expired. | |
163 | ||
164 | The memory for the passphrase is filled with underscores to clear any | |
165 | references to it. | |
166 | ||
167 | Custom variables `pgg-cache-passphrase' and `pgg-passphrase-cache-expiry' | |
168 | regulate cache behavior." | |
169 | (let* ((passphrase (pgg-read-passphrase-from-cache key notruncate)) | |
170 | (key (if notruncate key (pgg-truncate-key-identifier key))) | |
171 | (interned-timer-key (intern-soft key pgg-pending-timers)) | |
172 | (old-timer (symbol-value interned-timer-key))) | |
173 | (when passphrase | |
8fbdffe5 | 174 | (pgg-clear-string passphrase) |
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175 | (unintern key pgg-passphrase-cache)) |
176 | (when old-timer | |
177 | (pgg-cancel-timer old-timer) | |
178 | (unintern interned-timer-key pgg-pending-timers)))) | |
179 | ||
23f87bed | 180 | (eval-when-compile |
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181 | (defmacro pgg-run-at-time-1 (time repeat function args) |
182 | (when (featurep 'xemacs) | |
183 | (if (condition-case nil | |
184 | (let ((delete-itimer 'delete-itimer) | |
185 | (itimer-driver-start 'itimer-driver-start) | |
186 | (itimer-value 'itimer-value) | |
187 | (start-itimer 'start-itimer)) | |
188 | (unless (or (symbol-value 'itimer-process) | |
189 | (symbol-value 'itimer-timer)) | |
190 | (funcall itimer-driver-start)) | |
191 | ;; Check whether there is a bug to which the difference of | |
192 | ;; the present time and the time when the itimer driver was | |
193 | ;; woken up is subtracted from the initial itimer value. | |
194 | (let* ((inhibit-quit t) | |
195 | (ctime (current-time)) | |
196 | (itimer-timer-last-wakeup | |
197 | (prog1 | |
198 | ctime | |
199 | (setcar ctime (1- (car ctime))))) | |
200 | (itimer-list nil) | |
201 | (itimer (funcall start-itimer "pgg-run-at-time" | |
202 | 'ignore 5))) | |
203 | (sleep-for 0.1) ;; Accept the timeout interrupt. | |
204 | (prog1 | |
205 | (> (funcall itimer-value itimer) 0) | |
206 | (funcall delete-itimer itimer)))) | |
207 | (error nil)) | |
208 | `(let ((time ,time)) | |
209 | (apply #'start-itimer "pgg-run-at-time" | |
210 | ,function (if time (max time 1e-9) 1e-9) | |
211 | ,repeat nil t ,args))) | |
212 | `(let ((time ,time) | |
213 | (itimers (list nil))) | |
214 | (setcar | |
215 | itimers | |
216 | (apply #'start-itimer "pgg-run-at-time" | |
217 | (lambda (itimers repeat function &rest args) | |
218 | (let ((itimer (car itimers))) | |
219 | (if repeat | |
220 | (progn | |
221 | (set-itimer-function | |
222 | itimer | |
223 | (lambda (itimer repeat function &rest args) | |
224 | (set-itimer-restart itimer repeat) | |
225 | (set-itimer-function itimer function) | |
226 | (set-itimer-function-arguments itimer args) | |
227 | (apply function args))) | |
228 | (set-itimer-function-arguments | |
229 | itimer | |
230 | (append (list itimer repeat function) args))) | |
231 | (set-itimer-function | |
232 | itimer | |
233 | (lambda (itimer function &rest args) | |
234 | (delete-itimer itimer) | |
235 | (apply function args))) | |
236 | (set-itimer-function-arguments | |
237 | itimer | |
238 | (append (list itimer function) args))))) | |
239 | 1e-9 (if time (max time 1e-9) 1e-9) | |
240 | nil t itimers ,repeat ,function ,args)))))) | |
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241 | |
242 | (eval-and-compile | |
4a43ee9b | 243 | (if (featurep 'xemacs) |
7c700bd1 EZ |
244 | (progn |
245 | (defun pgg-run-at-time (time repeat function &rest args) | |
246 | "Emulating function run as `run-at-time'. | |
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247 | TIME should be nil meaning now, or a number of seconds from now. |
248 | Return an itimer object which can be used in either `delete-itimer' | |
249 | or `cancel-timer'." | |
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250 | (pgg-run-at-time-1 time repeat function args)) |
251 | (defun pgg-cancel-timer (timer) | |
252 | "Emulate cancel-timer for xemacs." | |
253 | (let ((delete-itimer 'delete-itimer)) | |
254 | (funcall delete-itimer timer))) | |
255 | ) | |
256 | (defalias 'pgg-run-at-time 'run-at-time) | |
257 | (defalias 'pgg-cancel-timer 'cancel-timer))) | |
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258 | |
259 | (defmacro pgg-convert-lbt-region (start end lbt) | |
260 | `(let ((pgg-conversion-end (set-marker (make-marker) ,end))) | |
261 | (goto-char ,start) | |
262 | (case ,lbt | |
263 | (CRLF | |
264 | (while (progn | |
265 | (end-of-line) | |
266 | (> (marker-position pgg-conversion-end) (point))) | |
267 | (insert "\r") | |
268 | (forward-line 1))) | |
269 | (LF | |
270 | (while (re-search-forward "\r$" pgg-conversion-end t) | |
271 | (replace-match "")))))) | |
272 | ||
273 | (put 'pgg-as-lbt 'lisp-indent-function 3) | |
274 | ||
275 | (defmacro pgg-as-lbt (start end lbt &rest body) | |
276 | `(let ((inhibit-read-only t) | |
277 | buffer-read-only | |
278 | buffer-undo-list) | |
279 | (pgg-convert-lbt-region ,start ,end ,lbt) | |
280 | (let ((,end (point))) | |
281 | ,@body) | |
282 | (push nil buffer-undo-list) | |
283 | (ignore-errors (undo)))) | |
284 | ||
285 | (put 'pgg-process-when-success 'lisp-indent-function 0) | |
286 | ||
287 | (defmacro pgg-process-when-success (&rest body) | |
288 | `(with-current-buffer pgg-output-buffer | |
289 | (if (zerop (buffer-size)) nil ,@body t))) | |
290 | ||
291 | (defalias 'pgg-make-temp-file | |
292 | (if (fboundp 'make-temp-file) | |
293 | 'make-temp-file | |
294 | (lambda (prefix &optional dir-flag) | |
295 | (let ((file (expand-file-name | |
296 | (make-temp-name prefix) | |
297 | (if (fboundp 'temp-directory) | |
298 | (temp-directory) | |
299 | temporary-file-directory)))) | |
300 | (if dir-flag | |
301 | (make-directory file)) | |
302 | file)))) | |
303 | ||
304 | ;;; @ interface functions | |
305 | ;;; | |
306 | ||
307 | ;;;###autoload | |
7c700bd1 | 308 | (defun pgg-encrypt-region (start end rcpts &optional sign passphrase) |
23f87bed | 309 | "Encrypt the current region between START and END for RCPTS. |
7c700bd1 EZ |
310 | |
311 | If optional argument SIGN is non-nil, do a combined sign and encrypt. | |
312 | ||
313 | If optional PASSPHRASE is not specified, it will be obtained from the | |
314 | passphrase cache or user." | |
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315 | (interactive |
316 | (list (region-beginning)(region-end) | |
317 | (split-string (read-string "Recipients: ") "[ \t,]+"))) | |
318 | (let ((status | |
319 | (pgg-save-coding-system start end | |
320 | (pgg-invoke "encrypt-region" (or pgg-scheme pgg-default-scheme) | |
7c700bd1 EZ |
321 | (point-min) (point-max) rcpts sign passphrase)))) |
322 | (when (interactive-p) | |
323 | (pgg-display-output-buffer start end status)) | |
324 | status)) | |
325 | ||
326 | ;;;###autoload | |
327 | (defun pgg-encrypt-symmetric-region (start end &optional passphrase) | |
328 | "Encrypt the current region between START and END symmetric with passphrase. | |
329 | ||
330 | If optional PASSPHRASE is not specified, it will be obtained from the | |
331 | cache or user." | |
332 | (interactive "r") | |
333 | (let ((status | |
334 | (pgg-save-coding-system start end | |
335 | (pgg-invoke "encrypt-symmetric-region" | |
336 | (or pgg-scheme pgg-default-scheme) | |
337 | (point-min) (point-max) passphrase)))) | |
23f87bed MB |
338 | (when (interactive-p) |
339 | (pgg-display-output-buffer start end status)) | |
340 | status)) | |
341 | ||
342 | ;;;###autoload | |
7c700bd1 EZ |
343 | (defun pgg-encrypt-symmetric (&optional start end passphrase) |
344 | "Encrypt the current buffer using a symmetric, rather than key-pair, cipher. | |
345 | ||
346 | If optional arguments START and END are specified, only encrypt within | |
347 | the region. | |
348 | ||
349 | If optional PASSPHRASE is not specified, it will be obtained from the | |
350 | passphrase cache or user." | |
351 | (interactive) | |
352 | (let* ((start (or start (point-min))) | |
353 | (end (or end (point-max))) | |
354 | (status (pgg-encrypt-symmetric-region start end passphrase))) | |
355 | (when (interactive-p) | |
356 | (pgg-display-output-buffer start end status)) | |
357 | status)) | |
358 | ||
359 | ;;;###autoload | |
360 | (defun pgg-encrypt (rcpts &optional sign start end passphrase) | |
23f87bed | 361 | "Encrypt the current buffer for RCPTS. |
7c700bd1 | 362 | |
23f87bed | 363 | If optional argument SIGN is non-nil, do a combined sign and encrypt. |
7c700bd1 | 364 | |
23f87bed | 365 | If optional arguments START and END are specified, only encrypt within |
7c700bd1 EZ |
366 | the region. |
367 | ||
368 | If optional PASSPHRASE is not specified, it will be obtained from the | |
369 | passphrase cache or user." | |
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370 | (interactive (list (split-string (read-string "Recipients: ") "[ \t,]+"))) |
371 | (let* ((start (or start (point-min))) | |
372 | (end (or end (point-max))) | |
7c700bd1 | 373 | (status (pgg-encrypt-region start end rcpts sign passphrase))) |
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374 | (when (interactive-p) |
375 | (pgg-display-output-buffer start end status)) | |
376 | status)) | |
377 | ||
378 | ;;;###autoload | |
7c700bd1 EZ |
379 | (defun pgg-decrypt-region (start end &optional passphrase) |
380 | "Decrypt the current region between START and END. | |
381 | ||
382 | If optional PASSPHRASE is not specified, it will be obtained from the | |
383 | passphrase cache or user." | |
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384 | (interactive "r") |
385 | (let* ((buf (current-buffer)) | |
386 | (status | |
387 | (pgg-save-coding-system start end | |
388 | (pgg-invoke "decrypt-region" (or pgg-scheme pgg-default-scheme) | |
7c700bd1 | 389 | (point-min) (point-max) passphrase)))) |
23f87bed MB |
390 | (when (interactive-p) |
391 | (pgg-display-output-buffer start end status)) | |
392 | status)) | |
393 | ||
394 | ;;;###autoload | |
7c700bd1 | 395 | (defun pgg-decrypt (&optional start end passphrase) |
23f87bed | 396 | "Decrypt the current buffer. |
7c700bd1 | 397 | |
23f87bed | 398 | If optional arguments START and END are specified, only decrypt within |
7c700bd1 EZ |
399 | the region. |
400 | ||
401 | If optional PASSPHRASE is not specified, it will be obtained from the | |
402 | passphrase cache or user." | |
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403 | (interactive "") |
404 | (let* ((start (or start (point-min))) | |
405 | (end (or end (point-max))) | |
7c700bd1 | 406 | (status (pgg-decrypt-region start end passphrase))) |
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407 | (when (interactive-p) |
408 | (pgg-display-output-buffer start end status)) | |
409 | status)) | |
410 | ||
411 | ;;;###autoload | |
7c700bd1 | 412 | (defun pgg-sign-region (start end &optional cleartext passphrase) |
23f87bed | 413 | "Make the signature from text between START and END. |
7c700bd1 | 414 | |
23f87bed MB |
415 | If the optional 3rd argument CLEARTEXT is non-nil, it does not create |
416 | a detached signature. | |
7c700bd1 | 417 | |
23f87bed | 418 | If this function is called interactively, CLEARTEXT is enabled |
7c700bd1 EZ |
419 | and the the output is displayed. |
420 | ||
421 | If optional PASSPHRASE is not specified, it will be obtained from the | |
422 | passphrase cache or user." | |
23f87bed MB |
423 | (interactive "r") |
424 | (let ((status (pgg-save-coding-system start end | |
425 | (pgg-invoke "sign-region" (or pgg-scheme pgg-default-scheme) | |
426 | (point-min) (point-max) | |
7c700bd1 EZ |
427 | (or (interactive-p) cleartext) |
428 | passphrase)))) | |
23f87bed MB |
429 | (when (interactive-p) |
430 | (pgg-display-output-buffer start end status)) | |
431 | status)) | |
432 | ||
433 | ;;;###autoload | |
7c700bd1 | 434 | (defun pgg-sign (&optional cleartext start end passphrase) |
23f87bed | 435 | "Sign the current buffer. |
7c700bd1 | 436 | |
23f87bed MB |
437 | If the optional argument CLEARTEXT is non-nil, it does not create a |
438 | detached signature. | |
7c700bd1 | 439 | |
23f87bed MB |
440 | If optional arguments START and END are specified, only sign data |
441 | within the region. | |
7c700bd1 | 442 | |
23f87bed | 443 | If this function is called interactively, CLEARTEXT is enabled |
7c700bd1 EZ |
444 | and the the output is displayed. |
445 | ||
446 | If optional PASSPHRASE is not specified, it will be obtained from the | |
447 | passphrase cache or user." | |
23f87bed MB |
448 | (interactive "") |
449 | (let* ((start (or start (point-min))) | |
450 | (end (or end (point-max))) | |
7c700bd1 EZ |
451 | (status (pgg-sign-region start end |
452 | (or (interactive-p) cleartext) | |
453 | passphrase))) | |
23f87bed MB |
454 | (when (interactive-p) |
455 | (pgg-display-output-buffer start end status)) | |
456 | status)) | |
7c700bd1 | 457 | |
23f87bed MB |
458 | ;;;###autoload |
459 | (defun pgg-verify-region (start end &optional signature fetch) | |
460 | "Verify the current region between START and END. | |
461 | If the optional 3rd argument SIGNATURE is non-nil, it is treated as | |
462 | the detached signature of the current region. | |
463 | ||
464 | If the optional 4th argument FETCH is non-nil, we attempt to fetch the | |
465 | signer's public key from `pgg-default-keyserver-address'." | |
466 | (interactive "r") | |
467 | (let* ((packet | |
468 | (if (null signature) nil | |
469 | (with-temp-buffer | |
470 | (buffer-disable-undo) | |
471 | (if (fboundp 'set-buffer-multibyte) | |
472 | (set-buffer-multibyte nil)) | |
473 | (insert-file-contents signature) | |
474 | (cdr (assq 2 (pgg-decode-armor-region | |
475 | (point-min)(point-max))))))) | |
476 | (key (cdr (assq 'key-identifier packet))) | |
477 | status keyserver) | |
478 | (and (stringp key) | |
479 | pgg-query-keyserver | |
480 | (setq key (concat "0x" (pgg-truncate-key-identifier key))) | |
481 | (null (pgg-lookup-key key)) | |
482 | (or fetch (interactive-p)) | |
483 | (y-or-n-p (format "Key %s not found; attempt to fetch? " key)) | |
484 | (setq keyserver | |
485 | (or (cdr (assq 'preferred-key-server packet)) | |
486 | pgg-default-keyserver-address)) | |
487 | (pgg-fetch-key keyserver key)) | |
488 | (setq status | |
489 | (pgg-save-coding-system start end | |
490 | (pgg-invoke "verify-region" (or pgg-scheme pgg-default-scheme) | |
491 | (point-min) (point-max) signature))) | |
492 | (when (interactive-p) | |
493 | (let ((temp-buffer-show-function | |
494 | (function pgg-temp-buffer-show-function))) | |
495 | (with-output-to-temp-buffer pgg-echo-buffer | |
496 | (set-buffer standard-output) | |
497 | (insert-buffer-substring (if status pgg-output-buffer | |
498 | pgg-errors-buffer))))) | |
499 | status)) | |
500 | ||
501 | ;;;###autoload | |
502 | (defun pgg-verify (&optional signature fetch start end) | |
503 | "Verify the current buffer. | |
504 | If the optional argument SIGNATURE is non-nil, it is treated as | |
505 | the detached signature of the current region. | |
506 | If the optional argument FETCH is non-nil, we attempt to fetch the | |
507 | signer's public key from `pgg-default-keyserver-address'. | |
508 | If optional arguments START and END are specified, only verify data | |
509 | within the region." | |
510 | (interactive "") | |
511 | (let* ((start (or start (point-min))) | |
512 | (end (or end (point-max))) | |
513 | (status (pgg-verify-region start end signature fetch))) | |
514 | (when (interactive-p) | |
515 | (let ((temp-buffer-show-function | |
516 | (function pgg-temp-buffer-show-function))) | |
517 | (with-output-to-temp-buffer pgg-echo-buffer | |
518 | (set-buffer standard-output) | |
519 | (insert-buffer-substring (if status pgg-output-buffer | |
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520 | pgg-errors-buffer))))) |
521 | status)) | |
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522 | |
523 | ;;;###autoload | |
524 | (defun pgg-insert-key () | |
525 | "Insert the ASCII armored public key." | |
526 | (interactive) | |
527 | (pgg-invoke "insert-key" (or pgg-scheme pgg-default-scheme))) | |
528 | ||
529 | ;;;###autoload | |
530 | (defun pgg-snarf-keys-region (start end) | |
531 | "Import public keys in the current region between START and END." | |
532 | (interactive "r") | |
533 | (pgg-save-coding-system start end | |
534 | (pgg-invoke "snarf-keys-region" (or pgg-scheme pgg-default-scheme) | |
535 | start end))) | |
536 | ||
537 | ;;;###autoload | |
538 | (defun pgg-snarf-keys () | |
539 | "Import public keys in the current buffer." | |
540 | (interactive "") | |
541 | (pgg-snarf-keys-region (point-min) (point-max))) | |
542 | ||
543 | (defun pgg-lookup-key (string &optional type) | |
544 | (pgg-invoke "lookup-key" (or pgg-scheme pgg-default-scheme) string type)) | |
545 | ||
546 | (defvar pgg-insert-url-function (function pgg-insert-url-with-w3)) | |
547 | ||
548 | (defun pgg-insert-url-with-w3 (url) | |
549 | (ignore-errors | |
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550 | (require 'url) |
551 | (let (buffer-file-name) | |
552 | (url-insert-file-contents url)))) | |
553 | ||
554 | (defvar pgg-insert-url-extra-arguments nil) | |
555 | (defvar pgg-insert-url-program nil) | |
556 | ||
557 | (defun pgg-insert-url-with-program (url) | |
558 | (let ((args (copy-sequence pgg-insert-url-extra-arguments)) | |
559 | process) | |
560 | (insert | |
561 | (with-temp-buffer | |
562 | (setq process | |
563 | (apply #'start-process " *PGG url*" (current-buffer) | |
564 | pgg-insert-url-program (nconc args (list url)))) | |
565 | (set-process-sentinel process #'ignore) | |
566 | (while (eq 'run (process-status process)) | |
567 | (accept-process-output process 5)) | |
568 | (delete-process process) | |
569 | (if (and process (eq 'run (process-status process))) | |
570 | (interrupt-process process)) | |
571 | (buffer-string))))) | |
572 | ||
573 | (defun pgg-fetch-key (keyserver key) | |
574 | "Attempt to fetch a KEY from KEYSERVER for addition to PGP or GnuPG keyring." | |
575 | (with-current-buffer (get-buffer-create pgg-output-buffer) | |
576 | (buffer-disable-undo) | |
577 | (erase-buffer) | |
578 | (let ((proto (if (string-match "^[a-zA-Z\\+\\.\\\\-]+:" keyserver) | |
579 | (substring keyserver 0 (1- (match-end 0)))))) | |
580 | (save-excursion | |
581 | (funcall pgg-insert-url-function | |
582 | (if proto keyserver | |
583 | (format "http://%s:11371/pks/lookup?op=get&search=%s" | |
584 | keyserver key)))) | |
585 | (when (re-search-forward "^-+BEGIN" nil 'last) | |
586 | (delete-region (point-min) (match-beginning 0)) | |
587 | (when (re-search-forward "^-+END" nil t) | |
588 | (delete-region (progn (end-of-line) (point)) | |
589 | (point-max))) | |
590 | (insert "\n") | |
591 | (with-temp-buffer | |
592 | (insert-buffer-substring pgg-output-buffer) | |
593 | (pgg-snarf-keys-region (point-min)(point-max))))))) | |
594 | ||
595 | ||
596 | (provide 'pgg) | |
597 | ||
598 | ;;; arch-tag: 9cc705dd-1e6a-4c90-8dce-c3561f9a2cf4 | |
599 | ;;; pgg.el ends here |