code.delx.au - gnu-emacs/blob - lisp/gnus/mml1991.el

   1 ;;; mml1991.el --- Old PGP message format (RFC 1991) support for MML
   2
   3 ;; Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003, 2004,
   4 ;;   2005 Free Software Foundation, Inc.
   5
   6 ;; Author: Sascha Lüdecke <sascha@meta-x.de>,
   7 ;;      Simon Josefsson <simon@josefsson.org> (Mailcrypt interface, Gnus glue)
   8 ;; Keywords PGP
   9
  10 ;; This file is part of GNU Emacs.
  11
  12 ;; GNU Emacs is free software; you can redistribute it and/or modify
  13 ;; it under the terms of the GNU General Public License as published by
  14 ;; the Free Software Foundation; either version 2, or (at your option)
  15 ;; any later version.
  16
  17 ;; GNU Emacs is distributed in the hope that it will be useful,
  18 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
  19 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20 ;; GNU General Public License for more details.
  21
  22 ;; You should have received a copy of the GNU General Public License
  23 ;; along with GNU Emacs; see the file COPYING.  If not, write to the
  24 ;; Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  25 ;; Boston, MA 02110-1301, USA.
  26
  27 ;;; Commentary:
  28
  29 ;;; Code:
  30
  31 (eval-when-compile
  32   (require 'cl)
  33   (require 'mm-util))
  34
  35 (autoload 'quoted-printable-decode-region "qp")
  36 (autoload 'quoted-printable-encode-region "qp")
  37
  38 (defvar mml1991-use mml2015-use
  39   "The package used for PGP.")
  40
  41 (defvar mml1991-function-alist
  42   '((mailcrypt mml1991-mailcrypt-sign
  43                mml1991-mailcrypt-encrypt)
  44     (gpg mml1991-gpg-sign
  45          mml1991-gpg-encrypt)
  46     (pgg mml1991-pgg-sign
  47          mml1991-pgg-encrypt))
  48   "Alist of PGP functions.")
  49
  50 ;;; mailcrypt wrapper
  51
  52 (eval-and-compile
  53   (autoload 'mc-sign-generic "mc-toplev"))
  54
  55 (defvar mml1991-decrypt-function 'mailcrypt-decrypt)
  56 (defvar mml1991-verify-function 'mailcrypt-verify)
  57
  58 (defun mml1991-mailcrypt-sign (cont)
  59   (let ((text (current-buffer))
  60         headers signature
  61         (result-buffer (get-buffer-create "*GPG Result*")))
  62     ;; Save MIME Content[^ ]+: headers from signing
  63     (goto-char (point-min))
  64     (while (looking-at "^Content[^ ]+:") (forward-line))
  65     (unless (bobp)
  66       (setq headers (buffer-string))
  67       (delete-region (point-min) (point)))
  68     (goto-char (point-max))
  69     (unless (bolp)
  70       (insert "\n"))
  71     (quoted-printable-decode-region (point-min) (point-max))
  72     (with-temp-buffer
  73       (setq signature (current-buffer))
  74       (insert-buffer-substring text)
  75       (unless (mc-sign-generic (message-options-get 'message-sender)
  76                                nil nil nil nil)
  77         (unless (> (point-max) (point-min))
  78           (pop-to-buffer result-buffer)
  79           (error "Sign error")))
  80       (goto-char (point-min))
  81       (while (re-search-forward "\r+$" nil t)
  82         (replace-match "" t t))
  83       (quoted-printable-encode-region (point-min) (point-max))
  84       (set-buffer text)
  85       (delete-region (point-min) (point-max))
  86       (if headers (insert headers))
  87       (insert "\n")
  88       (insert-buffer-substring signature)
  89       (goto-char (point-max)))))
  90
  91 (defun mml1991-mailcrypt-encrypt (cont &optional sign)
  92   (let ((text (current-buffer))
  93         (mc-pgp-always-sign
  94          (or mc-pgp-always-sign
  95              sign
  96              (eq t (or (message-options-get 'message-sign-encrypt)
  97                        (message-options-set
  98                         'message-sign-encrypt
  99                         (or (y-or-n-p "Sign the message? ")
 100                             'not))))
 101              'never))
 102         cipher
 103         (result-buffer (get-buffer-create "*GPG Result*")))
 104     ;; Strip MIME Content[^ ]: headers since it will be ASCII ARMOURED
 105     (goto-char (point-min))
 106     (while (looking-at "^Content[^ ]+:") (forward-line))
 107     (unless (bobp)
 108       (delete-region (point-min) (point)))
 109     (mm-with-unibyte-current-buffer
 110       (with-temp-buffer
 111         (setq cipher (current-buffer))
 112         (insert-buffer-substring text)
 113         (unless (mc-encrypt-generic
 114                  (or
 115                   (message-options-get 'message-recipients)
 116                   (message-options-set 'message-recipients
 117                                        (read-string "Recipients: ")))
 118                  nil
 119                  (point-min) (point-max)
 120                  (message-options-get 'message-sender)
 121                  'sign)
 122           (unless (> (point-max) (point-min))
 123             (pop-to-buffer result-buffer)
 124             (error "Encrypt error")))
 125         (goto-char (point-min))
 126         (while (re-search-forward "\r+$" nil t)
 127           (replace-match "" t t))
 128         (set-buffer text)
 129         (delete-region (point-min) (point-max))
 130         ;;(insert "Content-Type: application/pgp-encrypted\n\n")
 131         ;;(insert "Version: 1\n\n")
 132         (insert "\n")
 133         (insert-buffer-substring cipher)
 134         (goto-char (point-max))))))
 135
 136 ;;; gpg wrapper
 137
 138 (eval-and-compile
 139   (autoload 'gpg-sign-cleartext "gpg"))
 140
 141 (defun mml1991-gpg-sign (cont)
 142   (let ((text (current-buffer))
 143         headers signature
 144         (result-buffer (get-buffer-create "*GPG Result*")))
 145     ;; Save MIME Content[^ ]+: headers from signing
 146     (goto-char (point-min))
 147     (while (looking-at "^Content[^ ]+:") (forward-line))
 148     (unless (bobp)
 149       (setq headers (buffer-string))
 150       (delete-region (point-min) (point)))
 151     (goto-char (point-max))
 152     (unless (bolp)
 153       (insert "\n"))
 154     (quoted-printable-decode-region (point-min) (point-max))
 155     (with-temp-buffer
 156       (unless (gpg-sign-cleartext text (setq signature (current-buffer))
 157                                   result-buffer
 158                                   nil
 159                                   (message-options-get 'message-sender))
 160         (unless (> (point-max) (point-min))
 161           (pop-to-buffer result-buffer)
 162           (error "Sign error")))
 163       (goto-char (point-min))
 164       (while (re-search-forward "\r+$" nil t)
 165         (replace-match "" t t))
 166       (quoted-printable-encode-region (point-min) (point-max))
 167       (set-buffer text)
 168       (delete-region (point-min) (point-max))
 169       (if headers (insert headers))
 170       (insert "\n")
 171       (insert-buffer-substring signature)
 172       (goto-char (point-max)))))
 173
 174 (defun mml1991-gpg-encrypt (cont &optional sign)
 175   (let ((text (current-buffer))
 176         cipher
 177         (result-buffer (get-buffer-create "*GPG Result*")))
 178     ;; Strip MIME Content[^ ]: headers since it will be ASCII ARMOURED
 179     (goto-char (point-min))
 180     (while (looking-at "^Content[^ ]+:") (forward-line))
 181     (unless (bobp)
 182       (delete-region (point-min) (point)))
 183     (mm-with-unibyte-current-buffer
 184       (with-temp-buffer
 185         (flet ((gpg-encrypt-func
 186                 (sign plaintext ciphertext result recipients &optional
 187                       passphrase sign-with-key armor textmode)
 188                 (if sign
 189                     (gpg-sign-encrypt
 190                      plaintext ciphertext result recipients passphrase
 191                      sign-with-key armor textmode)
 192                   (gpg-encrypt
 193                    plaintext ciphertext result recipients passphrase
 194                    armor textmode))))
 195           (unless (gpg-encrypt-func
 196                    sign
 197                    text (setq cipher (current-buffer))
 198                    result-buffer
 199                    (split-string
 200                     (or
 201                      (message-options-get 'message-recipients)
 202                      (message-options-set 'message-recipients
 203                                           (read-string "Recipients: ")))
 204                     "[ \f\t\n\r\v,]+")
 205                    nil
 206                    (message-options-get 'message-sender)
 207                    t t) ; armor & textmode
 208             (unless (> (point-max) (point-min))
 209               (pop-to-buffer result-buffer)
 210               (error "Encrypt error"))))
 211         (goto-char (point-min))
 212         (while (re-search-forward "\r+$" nil t)
 213           (replace-match "" t t))
 214         (set-buffer text)
 215         (delete-region (point-min) (point-max))
 216         ;;(insert "Content-Type: application/pgp-encrypted\n\n")
 217         ;;(insert "Version: 1\n\n")
 218         (insert "\n")
 219         (insert-buffer-substring cipher)
 220         (goto-char (point-max))))))
 221
 222 ;; pgg wrapper
 223
 224 (eval-when-compile
 225   (defvar pgg-default-user-id)
 226   (defvar pgg-errors-buffer)
 227   (defvar pgg-output-buffer))
 228
 229 (defun mml1991-pgg-sign (cont)
 230   (let (headers cte)
 231     ;; Don't sign headers.
 232     (goto-char (point-min))
 233     (while (not (looking-at "^$"))
 234       (forward-line))
 235     (unless (eobp) ;; no headers?
 236       (setq headers (buffer-substring (point-min) (point)))
 237       (forward-line) ;; skip header/body separator
 238       (delete-region (point-min) (point)))
 239     (when (string-match "^Content-Transfer-Encoding: \\(.+\\)" headers)
 240       (setq cte (intern (match-string 1 headers))))
 241     (mm-decode-content-transfer-encoding cte)
 242     (unless (let ((pgg-default-user-id
 243                    (or (message-options-get 'mml-sender)
 244                        pgg-default-user-id)))
 245               (pgg-sign-region (point-min) (point-max) t))
 246       (pop-to-buffer pgg-errors-buffer)
 247       (error "Encrypt error"))
 248     (delete-region (point-min) (point-max))
 249     (mm-with-unibyte-current-buffer
 250       (insert-buffer-substring pgg-output-buffer)
 251       (goto-char (point-min))
 252       (while (re-search-forward "\r+$" nil t)
 253         (replace-match "" t t))
 254       (mm-encode-content-transfer-encoding cte)
 255       (goto-char (point-min))
 256       (when headers
 257         (insert headers))
 258       (insert "\n"))
 259     t))
 260
 261 (defun mml1991-pgg-encrypt (cont &optional sign)
 262   (let (cte)
 263     ;; Strip MIME Content[^ ]: headers since it will be ASCII ARMOURED
 264     (goto-char (point-min))
 265     (while (looking-at "^Content[^ ]+:")
 266       (when (looking-at "^Content-Transfer-Encoding: \\(.+\\)")
 267         (setq cte (intern (match-string 1))))
 268       (forward-line))
 269     (unless (bobp)
 270       (delete-region (point-min) (point)))
 271     (mm-decode-content-transfer-encoding cte)
 272     (unless (pgg-encrypt-region
 273              (point-min) (point-max)
 274              (split-string
 275               (or
 276                (message-options-get 'message-recipients)
 277                (message-options-set 'message-recipients
 278                                     (read-string "Recipients: ")))
 279               "[ \f\t\n\r\v,]+")
 280              sign)
 281       (pop-to-buffer pgg-errors-buffer)
 282       (error "Encrypt error"))
 283     (delete-region (point-min) (point-max))
 284     ;;(insert "Content-Type: application/pgp-encrypted\n\n")
 285     ;;(insert "Version: 1\n\n")
 286     (insert "\n")
 287     (insert-buffer-substring pgg-output-buffer)
 288     t))
 289
 290 ;;;###autoload
 291 (defun mml1991-encrypt (cont &optional sign)
 292   (let ((func (nth 2 (assq mml1991-use mml1991-function-alist))))
 293     (if func
 294         (funcall func cont sign)
 295       (error "Cannot find encrypt function"))))
 296
 297 ;;;###autoload
 298 (defun mml1991-sign (cont)
 299   (let ((func (nth 1 (assq mml1991-use mml1991-function-alist))))
 300     (if func
 301         (funcall func cont)
 302       (error "Cannot find sign function"))))
 303
 304 (provide 'mml1991)
 305
 306 ;; Local Variables:
 307 ;; coding: iso-8859-1
 308 ;; End:
 309
 310 ;;; arch-tag: e542be18-ab28-4393-9b33-97fe9cf30706
 311 ;;; mml1991.el ends here