lisp/gnus/mml1991.el

   1 ;;; mml1991.el --- Old PGP message format (RFC 1991) support for MML
   2 ;; Copyright (C) 1998, 1999, 2000, 2001, 2003, 2005
   3 ;;        Free Software Foundation, Inc.
   4
   5 ;; Author: Sascha Lüdecke <sascha@meta-x.de>,
   6 ;;      Simon Josefsson <simon@josefsson.org> (Mailcrypt interface, Gnus glue)
   7 ;; Keywords PGP
   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 ;;; Commentary:
  27
  28 ;;; Code:
  29
  30 (eval-when-compile
  31   (require 'cl)
  32   (require 'mm-util))
  33
  34 (autoload 'quoted-printable-decode-region "qp")
  35 (autoload 'quoted-printable-encode-region "qp")
  36
  37 (defvar mml1991-use mml2015-use
  38   "The package used for PGP.")
  39
  40 (defvar mml1991-function-alist
  41   '((mailcrypt mml1991-mailcrypt-sign
  42                mml1991-mailcrypt-encrypt)
  43     (gpg mml1991-gpg-sign
  44          mml1991-gpg-encrypt)
  45     (pgg mml1991-pgg-sign
  46          mml1991-pgg-encrypt))
  47   "Alist of PGP functions.")
  48
  49 ;;; mailcrypt wrapper
  50
  51 (eval-and-compile
  52   (autoload 'mc-sign-generic "mc-toplev"))
  53
  54 (defvar mml1991-decrypt-function 'mailcrypt-decrypt)
  55 (defvar mml1991-verify-function 'mailcrypt-verify)
  56
  57 (defun mml1991-mailcrypt-sign (cont)
  58   (let ((text (current-buffer))
  59         headers signature
  60         (result-buffer (get-buffer-create "*GPG Result*")))
  61     ;; Save MIME Content[^ ]+: headers from signing
  62     (goto-char (point-min))
  63     (while (looking-at "^Content[^ ]+:") (forward-line))
  64     (unless (bobp)
  65       (setq headers (buffer-string))
  66       (delete-region (point-min) (point)))
  67     (goto-char (point-max))
  68     (unless (bolp)
  69       (insert "\n"))
  70     (quoted-printable-decode-region (point-min) (point-max))
  71     (with-temp-buffer
  72       (setq signature (current-buffer))
  73       (insert-buffer-substring text)
  74       (unless (mc-sign-generic (message-options-get 'message-sender)
  75                                nil nil nil nil)
  76         (unless (> (point-max) (point-min))
  77           (pop-to-buffer result-buffer)
  78           (error "Sign error")))
  79       (goto-char (point-min))
  80       (while (re-search-forward "\r+$" nil t)
  81         (replace-match "" t t))
  82       (quoted-printable-encode-region (point-min) (point-max))
  83       (set-buffer text)
  84       (delete-region (point-min) (point-max))
  85       (if headers (insert headers))
  86       (insert "\n")
  87       (insert-buffer-substring signature)
  88       (goto-char (point-max)))))
  89
  90 (defun mml1991-mailcrypt-encrypt (cont &optional sign)
  91   (let ((text (current-buffer))
  92         (mc-pgp-always-sign
  93          (or mc-pgp-always-sign
  94              sign
  95              (eq t (or (message-options-get 'message-sign-encrypt)
  96                        (message-options-set
  97                         'message-sign-encrypt
  98                         (or (y-or-n-p "Sign the message? ")
  99                             'not))))
 100              'never))
 101         cipher
 102         (result-buffer (get-buffer-create "*GPG Result*")))
 103     ;; Strip MIME Content[^ ]: headers since it will be ASCII ARMOURED
 104     (goto-char (point-min))
 105     (while (looking-at "^Content[^ ]+:") (forward-line))
 106     (unless (bobp)
 107       (delete-region (point-min) (point)))
 108     (mm-with-unibyte-current-buffer
 109       (with-temp-buffer
 110         (setq cipher (current-buffer))
 111         (insert-buffer-substring text)
 112         (unless (mc-encrypt-generic
 113                  (or
 114                   (message-options-get 'message-recipients)
 115                   (message-options-set 'message-recipients
 116                                        (read-string "Recipients: ")))
 117                  nil
 118                  (point-min) (point-max)
 119                  (message-options-get 'message-sender)
 120                  'sign)
 121           (unless (> (point-max) (point-min))
 122             (pop-to-buffer result-buffer)
 123             (error "Encrypt error")))
 124         (goto-char (point-min))
 125         (while (re-search-forward "\r+$" nil t)
 126           (replace-match "" t t))
 127         (set-buffer text)
 128         (delete-region (point-min) (point-max))
 129         ;;(insert "Content-Type: application/pgp-encrypted\n\n")
 130         ;;(insert "Version: 1\n\n")
 131         (insert "\n")
 132         (insert-buffer-substring cipher)
 133         (goto-char (point-max))))))
 134
 135 ;;; gpg wrapper
 136
 137 (eval-and-compile
 138   (autoload 'gpg-sign-cleartext "gpg"))
 139
 140 (defun mml1991-gpg-sign (cont)
 141   (let ((text (current-buffer))
 142         headers signature
 143         (result-buffer (get-buffer-create "*GPG Result*")))
 144     ;; Save MIME Content[^ ]+: headers from signing
 145     (goto-char (point-min))
 146     (while (looking-at "^Content[^ ]+:") (forward-line))
 147     (unless (bobp)
 148       (setq headers (buffer-string))
 149       (delete-region (point-min) (point)))
 150     (goto-char (point-max))
 151     (unless (bolp)
 152       (insert "\n"))
 153     (quoted-printable-decode-region (point-min) (point-max))
 154     (with-temp-buffer
 155       (unless (gpg-sign-cleartext text (setq signature (current-buffer))
 156                                   result-buffer
 157                                   nil
 158                                   (message-options-get 'message-sender))
 159         (unless (> (point-max) (point-min))
 160           (pop-to-buffer result-buffer)
 161           (error "Sign error")))
 162       (goto-char (point-min))
 163       (while (re-search-forward "\r+$" nil t)
 164         (replace-match "" t t))
 165       (quoted-printable-encode-region (point-min) (point-max))
 166       (set-buffer text)
 167       (delete-region (point-min) (point-max))
 168       (if headers (insert headers))
 169       (insert "\n")
 170       (insert-buffer-substring signature)
 171       (goto-char (point-max)))))
 172
 173 (defun mml1991-gpg-encrypt (cont &optional sign)
 174   (let ((text (current-buffer))
 175         cipher
 176         (result-buffer (get-buffer-create "*GPG Result*")))
 177     ;; Strip MIME Content[^ ]: headers since it will be ASCII ARMOURED
 178     (goto-char (point-min))
 179     (while (looking-at "^Content[^ ]+:") (forward-line))
 180     (unless (bobp)
 181       (delete-region (point-min) (point)))
 182     (mm-with-unibyte-current-buffer
 183       (with-temp-buffer
 184         (flet ((gpg-encrypt-func
 185                 (sign plaintext ciphertext result recipients &optional
 186                       passphrase sign-with-key armor textmode)
 187                 (if sign
 188                     (gpg-sign-encrypt
 189                      plaintext ciphertext result recipients passphrase
 190                      sign-with-key armor textmode)
 191                   (gpg-encrypt
 192                    plaintext ciphertext result recipients passphrase
 193                    armor textmode))))
 194           (unless (gpg-encrypt-func
 195                    sign
 196                    text (setq cipher (current-buffer))
 197                    result-buffer
 198                    (split-string
 199                     (or
 200                      (message-options-get 'message-recipients)
 201                      (message-options-set 'message-recipients
 202                                           (read-string "Recipients: ")))
 203                     "[ \f\t\n\r\v,]+")
 204                    nil
 205                    (message-options-get 'message-sender)
 206                    t t) ; armor & textmode
 207             (unless (> (point-max) (point-min))
 208               (pop-to-buffer result-buffer)
 209               (error "Encrypt error"))))
 210         (goto-char (point-min))
 211         (while (re-search-forward "\r+$" nil t)
 212           (replace-match "" t t))
 213         (set-buffer text)
 214         (delete-region (point-min) (point-max))
 215         ;;(insert "Content-Type: application/pgp-encrypted\n\n")
 216         ;;(insert "Version: 1\n\n")
 217         (insert "\n")
 218         (insert-buffer-substring cipher)
 219         (goto-char (point-max))))))
 220
 221 ;; pgg wrapper
 222
 223 (eval-when-compile
 224   (defvar pgg-default-user-id)
 225   (defvar pgg-errors-buffer)
 226   (defvar pgg-output-buffer))
 227
 228 (defun mml1991-pgg-sign (cont)
 229   (let (headers cte)
 230     ;; Don't sign headers.
 231     (goto-char (point-min))
 232     (while (not (looking-at "^$"))
 233       (forward-line))
 234     (unless (eobp) ;; no headers?
 235       (setq headers (buffer-substring (point-min) (point)))
 236       (forward-line) ;; skip header/body separator
 237       (delete-region (point-min) (point)))
 238     (when (string-match "^Content-Transfer-Encoding: \\(.+\\)" headers)
 239       (setq cte (intern (match-string 1 headers))))
 240     (mm-decode-content-transfer-encoding cte)
 241     (unless (let ((pgg-default-user-id
 242                    (or (message-options-get 'mml-sender)
 243                        pgg-default-user-id)))
 244               (pgg-sign-region (point-min) (point-max) t))
 245       (pop-to-buffer pgg-errors-buffer)
 246       (error "Encrypt error"))
 247     (delete-region (point-min) (point-max))
 248     (mm-with-unibyte-current-buffer
 249       (insert-buffer-substring pgg-output-buffer)
 250       (goto-char (point-min))
 251       (while (re-search-forward "\r+$" nil t)
 252         (replace-match "" t t))
 253       (mm-encode-content-transfer-encoding cte)
 254       (goto-char (point-min))
 255       (when headers
 256         (insert headers))
 257       (insert "\n"))
 258     t))
 259
 260 (defun mml1991-pgg-encrypt (cont &optional sign)
 261   (let (cte)
 262     ;; Strip MIME Content[^ ]: headers since it will be ASCII ARMOURED
 263     (goto-char (point-min))
 264     (while (looking-at "^Content[^ ]+:")
 265       (when (looking-at "^Content-Transfer-Encoding: \\(.+\\)")
 266         (setq cte (intern (match-string 1))))
 267       (forward-line))
 268     (unless (bobp)
 269       (delete-region (point-min) (point)))
 270     (mm-decode-content-transfer-encoding cte)
 271     (unless (pgg-encrypt-region
 272              (point-min) (point-max)
 273              (split-string
 274               (or
 275                (message-options-get 'message-recipients)
 276                (message-options-set 'message-recipients
 277                                     (read-string "Recipients: ")))
 278               "[ \f\t\n\r\v,]+")
 279              sign)
 280       (pop-to-buffer pgg-errors-buffer)
 281       (error "Encrypt error"))
 282     (delete-region (point-min) (point-max))
 283     ;;(insert "Content-Type: application/pgp-encrypted\n\n")
 284     ;;(insert "Version: 1\n\n")
 285     (insert "\n")
 286     (insert-buffer-substring pgg-output-buffer)
 287     t))
 288
 289 ;;;###autoload
 290 (defun mml1991-encrypt (cont &optional sign)
 291   (let ((func (nth 2 (assq mml1991-use mml1991-function-alist))))
 292     (if func
 293         (funcall func cont sign)
 294       (error "Cannot find encrypt function"))))
 295
 296 ;;;###autoload
 297 (defun mml1991-sign (cont)
 298   (let ((func (nth 1 (assq mml1991-use mml1991-function-alist))))
 299     (if func
 300         (funcall func cont)
 301       (error "Cannot find sign function"))))
 302
 303 (provide 'mml1991)
 304
 305 ;; Local Variables:
 306 ;; coding: iso-8859-1
 307 ;; End:
 308
 309 ;;; arch-tag: e542be18-ab28-4393-9b33-97fe9cf30706
 310 ;;; mml1991.el ends here