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1 | ;;; pgg-pgp.el --- PGP 2.* and 6.* support for PGG. |
2 | ||
3 | ;; Copyright (C) 1999, 2000, 2003 Free Software Foundation, Inc. | |
4 | ||
5 | ;; Author: Daiki Ueno <ueno@unixuser.org> | |
6 | ;; Created: 1999/11/02 | |
7 | ;; Keywords: PGP, OpenPGP | |
8 | ||
9 | ;; This file is part of GNU Emacs. | |
10 | ||
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 2, or (at your option) | |
14 | ;; any later version. | |
15 | ||
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. | |
20 | ||
21 | ;; You should have received a copy of the GNU General Public License | |
22 | ;; along with GNU Emacs; see the file COPYING. If not, write to the | |
23 | ;; Free Software Foundation, Inc., 59 Temple Place - Suite 330, | |
24 | ;; Boston, MA 02111-1307, USA. | |
25 | ||
26 | ;;; Code: | |
27 | ||
28 | (eval-when-compile | |
29 | (require 'cl) ; for pgg macros | |
30 | (require 'pgg)) | |
31 | ||
32 | (defgroup pgg-pgp () | |
33 | "PGP 2.* and 6.* interface" | |
34 | :group 'pgg) | |
35 | ||
36 | (defcustom pgg-pgp-program "pgp" | |
37 | "PGP 2.* and 6.* executable." | |
38 | :group 'pgg-pgp | |
39 | :type 'string) | |
40 | ||
41 | (defcustom pgg-pgp-shell-file-name "/bin/sh" | |
42 | "File name to load inferior shells from. | |
43 | Bourne shell or its equivalent \(not tcsh) is needed for \"2>\"." | |
44 | :group 'pgg-pgp | |
45 | :type 'string) | |
46 | ||
47 | (defcustom pgg-pgp-shell-command-switch "-c" | |
48 | "Switch used to have the shell execute its command line argument." | |
49 | :group 'pgg-pgp | |
50 | :type 'string) | |
51 | ||
52 | (defcustom pgg-pgp-extra-args nil | |
53 | "Extra arguments for every PGP invocation." | |
54 | :group 'pgg-pgp | |
55 | :type '(choice | |
56 | (const :tag "None" nil) | |
57 | (string :tag "Arguments"))) | |
58 | ||
59 | (defvar pgg-pgp-user-id nil | |
60 | "PGP ID of your default identity.") | |
61 | ||
62 | (defun pgg-pgp-process-region (start end passphrase program args) | |
63 | (let* ((errors-file-name (pgg-make-temp-file "pgg-errors")) | |
64 | (args | |
65 | (append args | |
66 | pgg-pgp-extra-args | |
67 | (list (concat "2>" errors-file-name)))) | |
68 | (shell-file-name pgg-pgp-shell-file-name) | |
69 | (shell-command-switch pgg-pgp-shell-command-switch) | |
70 | (process-environment process-environment) | |
71 | (output-buffer pgg-output-buffer) | |
72 | (errors-buffer pgg-errors-buffer) | |
73 | (process-connection-type nil) | |
74 | process status exit-status) | |
75 | (with-current-buffer (get-buffer-create output-buffer) | |
76 | (buffer-disable-undo) | |
77 | (erase-buffer)) | |
78 | (when passphrase | |
79 | (setenv "PGPPASSFD" "0")) | |
80 | (unwind-protect | |
81 | (progn | |
82 | (let ((coding-system-for-read 'binary) | |
83 | (coding-system-for-write 'binary)) | |
84 | (setq process | |
85 | (apply #'funcall | |
86 | #'start-process-shell-command "*PGP*" output-buffer | |
87 | program args))) | |
88 | (set-process-sentinel process #'ignore) | |
89 | (when passphrase | |
90 | (process-send-string process (concat passphrase "\n"))) | |
91 | (process-send-region process start end) | |
92 | (process-send-eof process) | |
93 | (while (eq 'run (process-status process)) | |
94 | (accept-process-output process 5)) | |
95 | (setq status (process-status process) | |
96 | exit-status (process-exit-status process)) | |
97 | (delete-process process) | |
98 | (with-current-buffer output-buffer | |
99 | (pgg-convert-lbt-region (point-min)(point-max) 'LF) | |
100 | ||
101 | (if (memq status '(stop signal)) | |
102 | (error "%s exited abnormally: '%s'" program exit-status)) | |
103 | (if (= 127 exit-status) | |
104 | (error "%s could not be found" program)) | |
105 | ||
106 | (set-buffer (get-buffer-create errors-buffer)) | |
107 | (buffer-disable-undo) | |
108 | (erase-buffer) | |
109 | (insert-file-contents errors-file-name))) | |
110 | (if (and process (eq 'run (process-status process))) | |
111 | (interrupt-process process)) | |
112 | (condition-case nil | |
113 | (delete-file errors-file-name) | |
114 | (file-error nil))))) | |
115 | ||
116 | (defun pgg-pgp-lookup-key (string &optional type) | |
117 | "Search keys associated with STRING." | |
118 | (let ((args (list "+batchmode" "+language=en" "-kv" string))) | |
119 | (with-current-buffer (get-buffer-create pgg-output-buffer) | |
120 | (buffer-disable-undo) | |
121 | (erase-buffer) | |
122 | (apply #'call-process pgg-pgp-program nil t nil args) | |
123 | (goto-char (point-min)) | |
124 | (cond | |
125 | ((re-search-forward "^pub\\s +[0-9]+/" nil t);PGP 2.* | |
126 | (buffer-substring (point)(+ 8 (point)))) | |
127 | ((re-search-forward "^Type" nil t);PGP 6.* | |
128 | (beginning-of-line 2) | |
129 | (substring | |
130 | (nth 2 (split-string | |
131 | (buffer-substring (point)(progn (end-of-line) (point))))) | |
132 | 2)))))) | |
133 | ||
134 | (defun pgg-pgp-encrypt-region (start end recipients) | |
135 | "Encrypt the current region between START and END." | |
136 | (let* ((pgg-pgp-user-id (or pgg-pgp-user-id pgg-default-user-id)) | |
137 | (args | |
138 | `("+encrypttoself=off +verbose=1" "+batchmode" | |
139 | "+language=us" "-fate" | |
140 | ,@(if recipients | |
141 | (mapcar (lambda (rcpt) (concat "\"" rcpt "\"")) | |
142 | (append recipients | |
143 | (if pgg-encrypt-for-me | |
144 | (list pgg-pgp-user-id)))))))) | |
145 | (pgg-pgp-process-region start end nil pgg-pgp-program args) | |
146 | (pgg-process-when-success nil))) | |
147 | ||
148 | (defun pgg-pgp-decrypt-region (start end) | |
149 | "Decrypt the current region between START and END." | |
150 | (let* ((pgg-pgp-user-id (or pgg-pgp-user-id pgg-default-user-id)) | |
151 | (passphrase | |
152 | (pgg-read-passphrase | |
153 | (format "PGP passphrase for %s: " pgg-pgp-user-id) | |
154 | (pgg-pgp-lookup-key pgg-pgp-user-id 'encrypt))) | |
155 | (args | |
156 | '("+verbose=1" "+batchmode" "+language=us" "-f"))) | |
157 | (pgg-pgp-process-region start end passphrase pgg-pgp-program args) | |
158 | (pgg-process-when-success nil))) | |
159 | ||
160 | (defun pgg-pgp-sign-region (start end &optional clearsign) | |
161 | "Make detached signature from text between START and END." | |
162 | (let* ((pgg-pgp-user-id (or pgg-pgp-user-id pgg-default-user-id)) | |
163 | (passphrase | |
164 | (pgg-read-passphrase | |
165 | (format "PGP passphrase for %s: " pgg-pgp-user-id) | |
166 | (pgg-pgp-lookup-key pgg-pgp-user-id 'sign))) | |
167 | (args | |
168 | (list (if clearsign "-fast" "-fbast") | |
169 | "+verbose=1" "+language=us" "+batchmode" | |
170 | "-u" pgg-pgp-user-id))) | |
171 | (pgg-pgp-process-region start end passphrase pgg-pgp-program args) | |
172 | (pgg-process-when-success | |
173 | (goto-char (point-min)) | |
174 | (when (re-search-forward "^-+BEGIN PGP" nil t);XXX | |
175 | (let ((packet | |
176 | (cdr (assq 2 (pgg-parse-armor-region | |
177 | (progn (beginning-of-line 2) | |
178 | (point)) | |
179 | (point-max)))))) | |
180 | (if pgg-cache-passphrase | |
181 | (pgg-add-passphrase-cache | |
182 | (cdr (assq 'key-identifier packet)) | |
183 | passphrase))))))) | |
184 | ||
185 | (defun pgg-pgp-verify-region (start end &optional signature) | |
186 | "Verify region between START and END as the detached signature SIGNATURE." | |
187 | (let* ((orig-file (pgg-make-temp-file "pgg")) | |
188 | (args '("+verbose=1" "+batchmode" "+language=us")) | |
189 | (orig-mode (default-file-modes))) | |
190 | (unwind-protect | |
191 | (progn | |
192 | (set-default-file-modes 448) | |
193 | (let ((coding-system-for-write 'binary) | |
194 | jka-compr-compression-info-list jam-zcat-filename-list) | |
195 | (write-region start end orig-file))) | |
196 | (set-default-file-modes orig-mode)) | |
197 | (if (stringp signature) | |
198 | (progn | |
199 | (copy-file signature (setq signature (concat orig-file ".asc"))) | |
200 | (setq args (append args (list signature orig-file)))) | |
201 | (setq args (append args (list orig-file)))) | |
202 | (pgg-pgp-process-region (point)(point) nil pgg-pgp-program args) | |
203 | (delete-file orig-file) | |
204 | (if signature (delete-file signature)) | |
205 | (pgg-process-when-success | |
206 | (goto-char (point-min)) | |
207 | (let ((case-fold-search t)) | |
208 | (while (re-search-forward "^warning: " nil t) | |
209 | (delete-region (match-beginning 0) | |
210 | (progn (beginning-of-line 2) (point))))) | |
211 | (goto-char (point-min)) | |
212 | (when (re-search-forward "^\\.$" nil t) | |
213 | (delete-region (point-min) | |
214 | (progn (beginning-of-line 2) | |
215 | (point))))))) | |
216 | ||
217 | (defun pgg-pgp-insert-key () | |
218 | "Insert public key at point." | |
219 | (let* ((pgg-pgp-user-id (or pgg-pgp-user-id pgg-default-user-id)) | |
220 | (args | |
221 | (list "+verbose=1" "+batchmode" "+language=us" "-kxaf" | |
222 | (concat "\"" pgg-pgp-user-id "\"")))) | |
223 | (pgg-pgp-process-region (point)(point) nil pgg-pgp-program args) | |
224 | (insert-buffer-substring pgg-output-buffer))) | |
225 | ||
226 | (defun pgg-pgp-snarf-keys-region (start end) | |
227 | "Add all public keys in region between START and END to the keyring." | |
228 | (let* ((pgg-pgp-user-id (or pgg-pgp-user-id pgg-default-user-id)) | |
229 | (key-file (pgg-make-temp-file "pgg")) | |
230 | (args | |
231 | (list "+verbose=1" "+batchmode" "+language=us" "-kaf" | |
232 | key-file))) | |
233 | (let ((coding-system-for-write 'raw-text-dos)) | |
234 | (write-region start end key-file)) | |
235 | (pgg-pgp-process-region start end nil pgg-pgp-program args) | |
236 | (delete-file key-file) | |
237 | (pgg-process-when-success nil))) | |
238 | ||
239 | (provide 'pgg-pgp) | |
240 | ||
241 | ;;; arch-tag: 076b7801-37b2-49a6-97c3-218fdecde33c | |
242 | ;;; pgg-pgp.el ends here |