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-string ((scheme pgg-scheme-pgp5)
 130                                        string &optional type)
 131   (let ((args (list "+language=en" "-l" string)))
 132     (pgg-pgp5-process-region (point)(point) nil
 133                              pgg-pgp5-pgpk-program args)
 134     (with-current-buffer pgg-output-buffer
 135       (goto-char (point-min))
 136       (when (re-search-forward "^sec" nil t)
 137         (substring
 138          (nth 2 (split-string
 139                  (buffer-substring (match-end 0)
 140                                    (progn (end-of-line)(point)))
 141                  ))
 142          2)))
 143     ))
 144
 145 (luna-define-method encrypt-region ((scheme pgg-scheme-pgp5)
 146                                     start end recipients)
 147   (let* ((pgg-pgp5-user-id pgg-default-user-id)
 148          (passphrase
 149           (pgg-read-passphrase
 150            (format "PGP passphrase for %s: " pgg-pgp5-user-id)
 151            (luna-send scheme 'lookup-key-string
 152                       scheme pgg-pgp5-user-id 'encrypt)))
 153          (args
 154           `("+NoBatchInvalidKeys=off" "-fat" "+batchmode=1"
 155             ,@(if recipients
 156                   (apply #'append
 157                          (mapcar (lambda (rcpt)
 158                                    (list "-r"
 159                                          (concat "\"" rcpt "\"")))
 160                                  recipients))))))
 161     (pgg-pgp5-process-region start end passphrase
 162                              pgg-pgp5-pgpe-program args)
 163     (with-current-buffer pgg-output-buffer
 164       (if (zerop (buffer-size))
 165           (insert-buffer-substring pgg-errors-buffer)
 166         (let ((packet
 167                (cdr (assq 1 (pgg-parse-armor-region
 168                              (point-min)(point-max))))))
 169           (pgg-add-passphrase-cache
 170            (cdr (assq 'key-identifier packet))
 171            passphrase))))
 172     ))
 173
 174 (luna-define-method decrypt-region ((scheme pgg-scheme-pgp5)
 175                                     start end)
 176   (let* ((pgg-pgp5-user-id pgg-default-user-id)
 177          (passphrase
 178           (pgg-read-passphrase
 179            (format "PGP passphrase for %s: " pgg-pgp5-user-id)
 180            (luna-send scheme 'lookup-key-string
 181                       scheme pgg-pgp5-user-id 'encrypt)))
 182          (args
 183           '("+verbose=1" "+batchmode=1" "+language=us" "-f")))
 184     (pgg-pgp5-process-region start end passphrase
 185                              pgg-pgp5-pgpv-program args)
 186     (with-current-buffer pgg-output-buffer
 187       (when (zerop (buffer-size))
 188         (insert-buffer-substring pgg-errors-buffer)))
 189     ))
 190
 191 (luna-define-method sign-region ((scheme pgg-scheme-pgp5)
 192                                  start end)
 193   (let* ((pgg-pgp5-user-id pgg-default-user-id)
 194          (passphrase
 195           (pgg-read-passphrase
 196            (format "PGP passphrase for %s: " pgg-pgp5-user-id)
 197            (luna-send scheme 'lookup-key-string
 198                       scheme pgg-pgp5-user-id 'sign)))
 199          (args
 200           (list "-fbat" "+verbose=1" "+language=us" "+batchmode=1"
 201                 "-u" pgg-pgp5-user-id)))
 202     (pgg-pgp5-process-region start end passphrase
 203                              pgg-pgp5-pgps-program args)
 204     (with-current-buffer pgg-output-buffer
 205       (if (zerop (buffer-size))
 206           (insert-buffer-substring pgg-errors-buffer)
 207         (let ((packet
 208                (cdr (assq 2 (pgg-parse-armor-region
 209                              (point-min)(point-max))))))
 210           (pgg-add-passphrase-cache
 211            (cdr (assq 'key-identifier packet))
 212            passphrase))))
 213     ))
 214
 215 (luna-define-method verify-region ((scheme pgg-scheme-pgp5)
 216                                    start end &optional signature)
 217   (let* ((basename (expand-file-name "pgg" temporary-file-directory))
 218          (orig-file (make-temp-name basename))
 219          (args '("+verbose=1" "+batchmode=1" "+language=us")))
 220     (write-region-as-binary start end orig-file)
 221     (when (stringp signature)
 222       (copy-file signature (setq signature (concat orig-file ".asc")))
 223       (setq args (append args (list signature)))
 224       )
 225     (pgg-pgp5-process-region (point-min)(point-max) nil
 226                              pgg-pgp5-pgpv-program args)
 227     (delete-file orig-file)
 228     (delete-file signature)
 229     (set-buffer pgg-output-buffer)
 230     (with-current-buffer pgg-output-buffer
 231       (when (zerop (buffer-size))
 232         (insert-buffer-substring pgg-errors-buffer)))
 233     ))
 234
 235 (luna-define-method insert-key ((scheme pgg-scheme-pgp5))
 236   (let* ((pgg-pgp5-user-id pgg-default-user-id)
 237          (args
 238           (list "+verbose=1" "+batchmode=1" "+language=us" "-x"
 239                 (concat "\"" pgg-pgp5-user-id "\""))))
 240     (pgg-pgp5-process-region (point)(point) nil
 241                              pgg-pgp5-pgpk-program args)
 242     (insert-buffer-substring pgg-output-buffer)
 243     ))
 244
 245 (luna-define-method snarf-keys-region ((scheme pgg-scheme-pgp5)
 246                                        start end)
 247   (let* ((pgg-pgp5-user-id pgg-default-user-id)
 248          (basename (expand-file-name "pgg" temporary-file-directory))
 249          (key-file (make-temp-name basename))
 250          (args
 251           (list "+verbose=1" "+batchmode=1" "+language=us" "-a"
 252                 key-file)))
 253     (write-region-as-raw-text-CRLF start end key-file)
 254     (pgg-pgp5-process-region start end nil
 255                              pgg-pgp5-pgpk-program args)
 256     (delete-file key-file)
 257     ))
 258
 259 (provide 'pgg-pgp5)
 260
 261 ;;; pgg-pgp5.el ends here