pgg-pgp5.el

   1 ;;; pgg-pgp5.el --- PGP 5.* support for PGG.
   2
   3 ;; Copyright (C) 1999 Daiki Ueno
   4
   5 ;; Author: Daiki Ueno <ueno@ueda.info.waseda.ac.jp>
   6 ;; Created: 1999/11/02
   7 ;; Keywords: PGP, OpenPGP
   8
   9 ;; This file is part of SEMI (Secure Emacs MIME Interface).
  10
  11 ;; This program is free software; you can redistribute it and/or
  12 ;; modify it under the terms of the GNU General Public License as
  13 ;; published by the Free Software Foundation; either version 2, or (at
  14 ;; your option) any later version.
  15
  16 ;; This program is distributed in the hope that it will be useful, but
  17 ;; WITHOUT ANY WARRANTY; without even the implied warranty of
  18 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  19 ;; 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 (require 'pgg))
  29
  30 (defgroup pgg-pgp5 ()
  31   "PGP 5.* interface"
  32   :group 'pgg)
  33
  34 (defcustom pgg-pgp5-pgpe-program "pgpe"
  35   "PGP 5.* 'pgpe' executable."
  36   :group 'pgg-pgp5
  37   :type 'string)
  38
  39 (defcustom pgg-pgp5-pgps-program "pgps"
  40   "PGP 5.* 'pgps' executable."
  41   :group 'pgg-pgp5
  42   :type 'string)
  43
  44 (defcustom pgg-pgp5-pgpk-program "pgpk"
  45   "PGP 5.* 'pgpk' executable."
  46   :group 'pgg-pgp5
  47   :type 'string)
  48
  49 (defcustom pgg-pgp5-pgpv-program "pgpv"
  50   "PGP 5.* 'pgpv' executable."
  51   :group 'pgg-pgp5
  52   :type 'string)
  53
  54 (defcustom pgg-pgp5-shell-file-name "/bin/sh"
  55   "The GnuPG executable."
  56   :group 'pgg-pgp5
  57   :type 'string)
  58
  59 (defcustom pgg-pgp5-extra-args nil
  60   "Extra arguments for every PGP invocation."
  61   :group 'pgg-pgp5
  62   :type 'string)
  63
  64 (eval-and-compile
  65   (luna-define-class pgg-scheme-pgp5 (pgg-scheme))
  66   )
  67
  68 (defvar pgg-pgp5-user-id nil
  69   "GnuPG ID of your default identity.")
  70
  71 (defvar pgg-scheme-pgp5-instance nil)
  72
  73 ;;;###autoload
  74 (defun pgg-make-scheme-pgp5 ()
  75   (or pgg-scheme-pgp5-instance
  76       (setq pgg-scheme-pgp5-instance
  77             (luna-make-entity 'pgg-scheme-pgp5))))
  78
  79 (defun pgg-pgp5-process-region (start end passphrase program args)
  80   (let* ((errors-file-name
  81           (concat temporary-file-directory
  82                   (make-temp-name "pgg-errors")))
  83          (args
  84           (append args
  85                   pgg-pgp5-extra-args
  86                   (list (concat "2>" errors-file-name))))
  87          (shell-file-name pgg-pgp5-shell-file-name)
  88          (output-buffer pgg-output-buffer)
  89          (errors-buffer pgg-errors-buffer)
  90          (process-connection-type nil)
  91          process status exit-status)
  92     (with-current-buffer (get-buffer-create output-buffer)
  93       (buffer-disable-undo)
  94       (erase-buffer))
  95     (setq process
  96           (apply #'start-process-shell-command "*PGP*" output-buffer
  97                  program args))
  98     (set-process-sentinel process 'ignore)
  99     (when passphrase
 100       (setenv "PGPPASSFD" "0")
 101       (process-send-string process (concat passphrase "\n")))
 102     (process-send-region process start end)
 103     (process-send-eof process)
 104     (while (eq 'run (process-status process))
 105       (accept-process-output process 5))
 106     (setq status (process-status process)
 107           exit-status (process-exit-status process))
 108     (delete-process process)
 109     (with-current-buffer output-buffer
 110       (goto-char (point-min))
 111       (while (search-forward "\r$" nil t)
 112         (replace-match ""))
 113       (if (memq status '(stop signal))
 114           (error "%s exited abnormally: '%s'" program exit-status))
 115       (if (= 127 exit-status)
 116           (error "%s could not be found" program))
 117
 118       (set-buffer (get-buffer-create errors-buffer))
 119       (buffer-disable-undo)
 120       (erase-buffer)
 121       (insert-file-contents errors-file-name)
 122       (delete-file errors-file-name)
 123
 124       (if (and process (eq 'run (process-status process)))
 125           (interrupt-process process))
 126       )
 127     ))
 128
 129 (luna-define-method lookup-key ((scheme pgg-scheme-pgp5) string)
 130   (let ((args (list "+language=en" "-l" string)))
 131     (pgg-pgp5-process-region (point)(point) nil
 132                              pgg-pgp5-pgpk-program args)
 133     (with-current-buffer pgg-output-buffer
 134       (goto-char (point-min))
 135       (when (re-search-forward "^sec" nil t)
 136         (substring
 137          (nth 2 (split-string
 138                  (buffer-substring (match-end 0)
 139                                    (progn (end-of-line)(point)))
 140                  ))
 141          2)))
 142     ))
 143
 144 (luna-define-method encrypt-region ((scheme pgg-scheme-pgp5)
 145                                     start end recipients)
 146   (let* ((pgg-pgp5-user-id pgg-default-user-id)
 147          (passphrase
 148           (pgg-read-passphrase
 149            (format "PGP passphrase for %s: " pgg-pgp5-user-id)
 150            (luna-send scheme 'lookup-key scheme pgg-pgp5-user-id)))
 151          (args
 152           `("+NoBatchInvalidKeys=off" "-fat" "+batchmode=1"
 153             ,@(if recipients
 154                   (apply #'append
 155                          (mapcar (lambda (rcpt)
 156                                    (list "-r"
 157                                          (concat "\"" rcpt "\"")))
 158                                  recipients))))))
 159     (pgg-pgp5-process-region start end passphrase
 160                              pgg-pgp5-pgpe-program args)
 161     (with-current-buffer pgg-output-buffer
 162       (if (zerop (buffer-size))
 163           (insert-buffer-substring pgg-errors-buffer)
 164         (let ((packet
 165                (cdr (assq 1 (pgg-parse-armor-region
 166                              (point-min)(point-max))))))
 167           (pgg-add-passphrase-cache
 168            (cdr (assq 'key-identifier packet))
 169            passphrase))))
 170     ))
 171
 172 (luna-define-method decrypt-region ((scheme pgg-scheme-pgp5)
 173                                     start end)
 174   (let* ((pgg-pgp5-user-id pgg-default-user-id)
 175          (passphrase
 176           (pgg-read-passphrase
 177            (format "PGP passphrase for %s: " pgg-pgp5-user-id)
 178            (luna-send scheme 'lookup-key scheme pgg-pgp5-user-id)))
 179          (args
 180           '("+verbose=1" "+batchmode=1" "+language=us" "-f")))
 181     (pgg-pgp5-process-region start end passphrase
 182                              pgg-pgp5-pgpv-program args)
 183     (with-current-buffer pgg-output-buffer
 184       (when (zerop (buffer-size))
 185         (insert-buffer-substring pgg-errors-buffer)))
 186     ))
 187
 188 (luna-define-method sign-region ((scheme pgg-scheme-pgp5)
 189                                  start end)
 190   (let* ((pgg-pgp5-user-id pgg-default-user-id)
 191          (passphrase
 192           (pgg-read-passphrase
 193            (format "PGP passphrase for %s: " pgg-pgp5-user-id)
 194            (luna-send scheme 'lookup-key scheme pgg-pgp5-user-id)))
 195          (args
 196           (list "-fbat" "+verbose=1" "+language=us" "+batchmode=1"
 197                 "-u" pgg-pgp5-user-id)))
 198     (pgg-pgp5-process-region start end passphrase
 199                              pgg-pgp5-pgps-program args)
 200     (with-current-buffer pgg-output-buffer
 201       (if (zerop (buffer-size))
 202           (insert-buffer-substring pgg-errors-buffer)
 203         (let ((packet
 204                (cdr (assq 2 (pgg-parse-armor-region
 205                              (point-min)(point-max))))))
 206           (pgg-add-passphrase-cache
 207            (cdr (assq 'key-identifier packet))
 208            passphrase))))
 209     ))
 210
 211 (luna-define-method verify-region ((scheme pgg-scheme-pgp5)
 212                                    start end &optional signature)
 213   (let* ((basename (expand-file-name "pgg" temporary-file-directory))
 214          (orig-file (make-temp-name basename))
 215          (args '("+verbose=1" "+batchmode=1" "+language=us")))
 216     (write-region-as-binary start end orig-file)
 217     (when (stringp signature)
 218       (copy-file signature (setq signature (concat orig-file ".asc")))
 219       (setq args (append args (list signature)))
 220       )
 221     (pgg-pgp5-process-region (point-min)(point-max) nil
 222                              pgg-pgp5-pgpv-program args)
 223     (delete-file orig-file)
 224     (delete-file signature)
 225     (set-buffer pgg-output-buffer)
 226     (with-current-buffer pgg-output-buffer
 227       (when (zerop (buffer-size))
 228         (insert-buffer-substring pgg-errors-buffer)))
 229     ))
 230
 231 (luna-define-method insert-key ((scheme pgg-scheme-pgp5))
 232   (let* ((pgg-pgp5-user-id pgg-default-user-id)
 233          (args
 234           (list "+verbose=1" "+batchmode=1" "+language=us" "-x"
 235                 (concat "\"" pgg-pgp5-user-id "\""))))
 236     (pgg-pgp5-process-region (point)(point) nil
 237                              pgg-pgp5-pgpk-program args)
 238     (insert-buffer-substring pgg-output-buffer)
 239     ))
 240
 241 (luna-define-method snarf-keys-region ((scheme pgg-scheme-pgp5)
 242                                        start end)
 243   (let* ((pgg-pgp5-user-id pgg-default-user-id)
 244          (basename (expand-file-name "pgg" temporary-file-directory))
 245          (key-file (make-temp-name basename))
 246          (args
 247           (list "+verbose=1" "+batchmode=1" "+language=us" "-a"
 248                 key-file)))
 249     (write-region-as-raw-text-CRLF start end key-file)
 250     (pgg-pgp5-process-region start end nil
 251                              pgg-pgp5-pgpk-program args)
 252     (delete-file key-file)
 253     ))
 254
 255 (provide 'pgg-pgp5)
 256
 257 ;;; pgg-pgp5.el ends here