1 ;;; pgg-gpg.el --- GnuPG support for PGG.
3 ;; Copyright (C) 1999, 2000, 2003 Free Software Foundation, Inc.
5 ;; Author: Daiki Ueno <ueno@unixuser.org>
7 ;; Keywords: PGP, OpenPGP, GnuPG
9 ;; This file is part of GNU Emacs.
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)
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.
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.
29 (require 'cl) ; for gpg macros
36 (defcustom pgg-gpg-program "gpg"
37 "The GnuPG executable."
41 (defcustom pgg-gpg-extra-args nil
42 "Extra arguments for every GnuPG invocation."
45 (const :tag "None" nil)
46 (string :tag "Arguments")))
48 (defvar pgg-gpg-user-id nil
49 "GnuPG ID of your default identity.")
51 (defun pgg-gpg-process-region (start end passphrase program args)
52 (let* ((output-file-name (pgg-make-temp-file "pgg-output"))
55 ,@(if passphrase '("--passphrase-fd" "0"))
57 "--output" ,output-file-name
58 ,@pgg-gpg-extra-args ,@args))
59 (output-buffer pgg-output-buffer)
60 (errors-buffer pgg-errors-buffer)
61 (orig-mode (default-file-modes))
62 (process-connection-type nil)
64 (with-current-buffer (get-buffer-create errors-buffer)
69 (set-default-file-modes 448)
70 (let ((coding-system-for-write 'binary)
71 (input (buffer-substring-no-properties start end))
72 (default-enable-multibyte-characters nil))
75 (insert passphrase "\n"))
78 (apply #'call-process-region (point-min) (point-max) program
79 nil errors-buffer nil args))))
80 (with-current-buffer (get-buffer-create output-buffer)
83 (if (file-exists-p output-file-name)
84 (let ((coding-system-for-read 'raw-text-dos))
85 (insert-file-contents output-file-name)))
86 (set-buffer errors-buffer)
87 (if (not (equal exit-status 0))
88 (insert (format "\n%s exited abnormally: '%s'\n"
89 program exit-status)))))
90 (if (file-exists-p output-file-name)
91 (delete-file output-file-name))
92 (set-default-file-modes orig-mode))))
94 (defun pgg-gpg-possibly-cache-passphrase (passphrase)
95 (if (and pgg-cache-passphrase
97 (goto-char (point-min))
98 (re-search-forward "^\\[GNUPG:] GOOD_PASSPHRASE\\>" nil t)))
99 (pgg-add-passphrase-cache
101 (goto-char (point-min))
102 (if (re-search-forward
103 "^\\[GNUPG:] NEED_PASSPHRASE \\w+ ?\\w*" nil t)
104 (substring (match-string 0) -8)))
107 (defun pgg-gpg-lookup-key (string &optional type)
108 "Search keys associated with STRING."
109 (let ((args (list "--with-colons" "--no-greeting" "--batch"
110 (if type "--list-secret-keys" "--list-keys")
113 (apply #'call-process pgg-gpg-program nil t nil args)
114 (goto-char (point-min))
115 (if (re-search-forward "^\\(sec\\|pub\\):" nil t)
118 (buffer-substring (match-end 0)
119 (progn (end-of-line)(point)))
122 (defun pgg-gpg-encrypt-region (start end recipients &optional sign)
123 "Encrypt the current region between START and END.
124 If optional argument SIGN is non-nil, do a combined sign and encrypt."
125 (let* ((pgg-gpg-user-id (or pgg-gpg-user-id pgg-default-user-id))
129 (format "GnuPG passphrase for %s: " pgg-gpg-user-id)
130 (pgg-gpg-lookup-key pgg-gpg-user-id 'encrypt))))
133 (list "--batch" "--armor" "--always-trust" "--encrypt")
134 (if sign (list "--sign" "--local-user" pgg-gpg-user-id))
137 (mapcar (lambda (rcpt)
138 (list "--remote-user" rcpt))
140 (if pgg-encrypt-for-me
141 (list pgg-gpg-user-id)))))))))
142 (pgg-as-lbt start end 'CRLF
143 (pgg-gpg-process-region start end passphrase pgg-gpg-program args))
145 (with-current-buffer pgg-errors-buffer
146 (pgg-gpg-possibly-cache-passphrase passphrase)))
147 (pgg-process-when-success)))
149 (defun pgg-gpg-decrypt-region (start end)
150 "Decrypt the current region between START and END."
151 (let* ((pgg-gpg-user-id (or pgg-gpg-user-id pgg-default-user-id))
154 (format "GnuPG passphrase for %s: " pgg-gpg-user-id)
155 (pgg-gpg-lookup-key pgg-gpg-user-id 'encrypt)))
156 (args '("--batch" "--decrypt")))
157 (pgg-gpg-process-region start end passphrase pgg-gpg-program args)
158 (with-current-buffer pgg-errors-buffer
159 (pgg-gpg-possibly-cache-passphrase passphrase)
160 (goto-char (point-min))
161 (re-search-forward "^\\[GNUPG:] DECRYPTION_OKAY\\>" nil t))))
163 (defun pgg-gpg-sign-region (start end &optional cleartext)
164 "Make detached signature from text between START and END."
165 (let* ((pgg-gpg-user-id (or pgg-gpg-user-id pgg-default-user-id))
168 (format "GnuPG passphrase for %s: " pgg-gpg-user-id)
169 (pgg-gpg-lookup-key pgg-gpg-user-id 'sign)))
171 (list (if cleartext "--clearsign" "--detach-sign")
172 "--armor" "--batch" "--verbose"
173 "--local-user" pgg-gpg-user-id))
174 (inhibit-read-only t)
176 (pgg-as-lbt start end 'CRLF
177 (pgg-gpg-process-region start end passphrase pgg-gpg-program args))
178 (with-current-buffer pgg-errors-buffer
179 (pgg-gpg-possibly-cache-passphrase passphrase))
180 (pgg-process-when-success)))
182 (defun pgg-gpg-verify-region (start end &optional signature)
183 "Verify region between START and END as the detached signature SIGNATURE."
184 (let ((args '("--batch" "--verify")))
185 (when (stringp signature)
186 (setq args (append args (list signature))))
187 (setq args (append args '("-")))
188 (pgg-gpg-process-region start end nil pgg-gpg-program args)
189 (with-current-buffer pgg-errors-buffer
190 (goto-char (point-min))
191 (while (re-search-forward "^gpg: \\(.*\\)\n" nil t)
192 (with-current-buffer pgg-output-buffer
193 (insert-buffer-substring pgg-errors-buffer
194 (match-beginning 1) (match-end 0)))
195 (delete-region (match-beginning 0) (match-end 0)))
196 (goto-char (point-min))
197 (re-search-forward "^\\[GNUPG:] GOODSIG\\>" nil t))))
199 (defun pgg-gpg-insert-key ()
200 "Insert public key at point."
201 (let* ((pgg-gpg-user-id (or pgg-gpg-user-id pgg-default-user-id))
202 (args (list "--batch" "--export" "--armor"
204 (pgg-gpg-process-region (point)(point) nil pgg-gpg-program args)
205 (insert-buffer-substring pgg-output-buffer)))
207 (defun pgg-gpg-snarf-keys-region (start end)
208 "Add all public keys in region between START and END to the keyring."
209 (let ((args '("--import" "--batch" "-")) status)
210 (pgg-gpg-process-region start end nil pgg-gpg-program args)
211 (set-buffer pgg-errors-buffer)
212 (goto-char (point-min))
213 (when (re-search-forward "^\\[GNUPG:] IMPORT_RES\\>" nil t)
214 (setq status (buffer-substring (match-end 0)
215 (progn (end-of-line)(point)))
216 status (vconcat (mapcar #'string-to-int (split-string status))))
218 (insert (format "Imported %d key(s).
219 \tArmor contains %d key(s) [%d bad, %d old].\n"
226 (if (zerop (aref status 9))
228 "\tSecret keys are imported.\n")))
229 (append-to-buffer pgg-output-buffer (point-min)(point-max))
230 (pgg-process-when-success)))
234 ;;; pgg-gpg.el ends here