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315 lines
9.6 KiB
EmacsLisp
315 lines
9.6 KiB
EmacsLisp
;;; mml1991.el --- Old PGP message format (RFC 1991) support for MML
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;; Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003, 2004,
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;; 2005, 2006, 2007 Free Software Foundation, Inc.
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;; Author: Sascha Lüdecke <sascha@meta-x.de>,
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;; Simon Josefsson <simon@josefsson.org> (Mailcrypt interface, Gnus glue)
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;; Keywords PGP
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;; This file is part of GNU Emacs.
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;; GNU Emacs is free software; you can redistribute it and/or modify
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;; it under the terms of the GNU General Public License as published by
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;; the Free Software Foundation; either version 3, or (at your option)
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;; any later version.
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;; GNU Emacs is distributed in the hope that it will be useful,
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;; but WITHOUT ANY WARRANTY; without even the implied warranty of
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;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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;; GNU General Public License for more details.
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;; You should have received a copy of the GNU General Public License
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;; along with GNU Emacs; see the file COPYING. If not, write to the
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;; Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
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;; Boston, MA 02110-1301, USA.
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;;; Commentary:
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;;; Code:
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(eval-when-compile
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(require 'cl)
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(require 'mm-util))
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(defvar mc-pgp-always-sign)
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(autoload 'quoted-printable-decode-region "qp")
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(autoload 'quoted-printable-encode-region "qp")
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(defvar mml1991-use mml2015-use
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"The package used for PGP.")
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(defvar mml1991-function-alist
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'((mailcrypt mml1991-mailcrypt-sign
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mml1991-mailcrypt-encrypt)
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(gpg mml1991-gpg-sign
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mml1991-gpg-encrypt)
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(pgg mml1991-pgg-sign
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mml1991-pgg-encrypt))
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"Alist of PGP functions.")
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;;; mailcrypt wrapper
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(eval-and-compile
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(autoload 'mc-sign-generic "mc-toplev"))
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(defvar mml1991-decrypt-function 'mailcrypt-decrypt)
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(defvar mml1991-verify-function 'mailcrypt-verify)
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(defun mml1991-mailcrypt-sign (cont)
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(let ((text (current-buffer))
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headers signature
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(result-buffer (get-buffer-create "*GPG Result*")))
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;; Save MIME Content[^ ]+: headers from signing
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(goto-char (point-min))
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(while (looking-at "^Content[^ ]+:") (forward-line))
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(unless (bobp)
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(setq headers (buffer-string))
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(delete-region (point-min) (point)))
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(goto-char (point-max))
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(unless (bolp)
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(insert "\n"))
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(quoted-printable-decode-region (point-min) (point-max))
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(with-temp-buffer
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(setq signature (current-buffer))
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(insert-buffer-substring text)
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(unless (mc-sign-generic (message-options-get 'message-sender)
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nil nil nil nil)
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(unless (> (point-max) (point-min))
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(pop-to-buffer result-buffer)
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(error "Sign error")))
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(goto-char (point-min))
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(while (re-search-forward "\r+$" nil t)
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(replace-match "" t t))
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(quoted-printable-encode-region (point-min) (point-max))
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(set-buffer text)
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(delete-region (point-min) (point-max))
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(if headers (insert headers))
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(insert "\n")
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(insert-buffer-substring signature)
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(goto-char (point-max)))))
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(defun mml1991-mailcrypt-encrypt (cont &optional sign)
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(let ((text (current-buffer))
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(mc-pgp-always-sign
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(or mc-pgp-always-sign
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sign
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(eq t (or (message-options-get 'message-sign-encrypt)
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(message-options-set
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'message-sign-encrypt
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(or (y-or-n-p "Sign the message? ")
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'not))))
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'never))
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cipher
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(result-buffer (get-buffer-create "*GPG Result*")))
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;; Strip MIME Content[^ ]: headers since it will be ASCII ARMOURED
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(goto-char (point-min))
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(while (looking-at "^Content[^ ]+:") (forward-line))
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(unless (bobp)
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(delete-region (point-min) (point)))
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(mm-with-unibyte-current-buffer
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(with-temp-buffer
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(setq cipher (current-buffer))
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(insert-buffer-substring text)
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(unless (mc-encrypt-generic
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(or
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(message-options-get 'message-recipients)
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(message-options-set 'message-recipients
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(read-string "Recipients: ")))
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nil
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(point-min) (point-max)
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(message-options-get 'message-sender)
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'sign)
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(unless (> (point-max) (point-min))
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(pop-to-buffer result-buffer)
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(error "Encrypt error")))
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(goto-char (point-min))
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(while (re-search-forward "\r+$" nil t)
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(replace-match "" t t))
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(set-buffer text)
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(delete-region (point-min) (point-max))
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;;(insert "Content-Type: application/pgp-encrypted\n\n")
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;;(insert "Version: 1\n\n")
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(insert "\n")
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(insert-buffer-substring cipher)
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(goto-char (point-max))))))
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;;; gpg wrapper
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(eval-and-compile
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(autoload 'gpg-sign-cleartext "gpg"))
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(defun mml1991-gpg-sign (cont)
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(let ((text (current-buffer))
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headers signature
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(result-buffer (get-buffer-create "*GPG Result*")))
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;; Save MIME Content[^ ]+: headers from signing
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(goto-char (point-min))
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(while (looking-at "^Content[^ ]+:") (forward-line))
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(unless (bobp)
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(setq headers (buffer-string))
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(delete-region (point-min) (point)))
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(goto-char (point-max))
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(unless (bolp)
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(insert "\n"))
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(quoted-printable-decode-region (point-min) (point-max))
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(with-temp-buffer
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(unless (gpg-sign-cleartext text (setq signature (current-buffer))
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result-buffer
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nil
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(message-options-get 'message-sender))
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(unless (> (point-max) (point-min))
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(pop-to-buffer result-buffer)
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(error "Sign error")))
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(goto-char (point-min))
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(while (re-search-forward "\r+$" nil t)
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(replace-match "" t t))
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(quoted-printable-encode-region (point-min) (point-max))
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(set-buffer text)
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(delete-region (point-min) (point-max))
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(if headers (insert headers))
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(insert "\n")
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(insert-buffer-substring signature)
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(goto-char (point-max)))))
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(defun mml1991-gpg-encrypt (cont &optional sign)
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(let ((text (current-buffer))
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cipher
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(result-buffer (get-buffer-create "*GPG Result*")))
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;; Strip MIME Content[^ ]: headers since it will be ASCII ARMOURED
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(goto-char (point-min))
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(while (looking-at "^Content[^ ]+:") (forward-line))
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(unless (bobp)
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(delete-region (point-min) (point)))
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(mm-with-unibyte-current-buffer
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(with-temp-buffer
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(flet ((gpg-encrypt-func
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(sign plaintext ciphertext result recipients &optional
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passphrase sign-with-key armor textmode)
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(if sign
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(gpg-sign-encrypt
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plaintext ciphertext result recipients passphrase
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sign-with-key armor textmode)
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(gpg-encrypt
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plaintext ciphertext result recipients passphrase
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armor textmode))))
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(unless (gpg-encrypt-func
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sign
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text (setq cipher (current-buffer))
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result-buffer
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(split-string
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(or
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(message-options-get 'message-recipients)
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(message-options-set 'message-recipients
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(read-string "Recipients: ")))
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"[ \f\t\n\r\v,]+")
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nil
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(message-options-get 'message-sender)
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t t) ; armor & textmode
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(unless (> (point-max) (point-min))
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(pop-to-buffer result-buffer)
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(error "Encrypt error"))))
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(goto-char (point-min))
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(while (re-search-forward "\r+$" nil t)
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(replace-match "" t t))
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(set-buffer text)
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(delete-region (point-min) (point-max))
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;;(insert "Content-Type: application/pgp-encrypted\n\n")
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;;(insert "Version: 1\n\n")
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(insert "\n")
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(insert-buffer-substring cipher)
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(goto-char (point-max))))))
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;; pgg wrapper
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(eval-when-compile
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(defvar pgg-default-user-id)
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(defvar pgg-errors-buffer)
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(defvar pgg-output-buffer))
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(defun mml1991-pgg-sign (cont)
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(let ((pgg-text-mode t)
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(pgg-default-user-id (or (message-options-get 'mml-sender)
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pgg-default-user-id))
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headers cte)
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;; Don't sign headers.
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(goto-char (point-min))
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(when (re-search-forward "^$" nil t)
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(setq headers (buffer-substring (point-min) (point)))
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(save-restriction
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(narrow-to-region (point-min) (point))
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(setq cte (mail-fetch-field "content-transfer-encoding")))
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(forward-line 1)
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(delete-region (point-min) (point))
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(when cte
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(setq cte (intern (downcase cte)))
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(mm-decode-content-transfer-encoding cte)))
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(unless (pgg-sign-region (point-min) (point-max) t)
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(pop-to-buffer pgg-errors-buffer)
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(error "Encrypt error"))
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(delete-region (point-min) (point-max))
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(mm-with-unibyte-current-buffer
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(insert-buffer-substring pgg-output-buffer)
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(goto-char (point-min))
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(while (re-search-forward "\r+$" nil t)
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(replace-match "" t t))
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(when cte
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(mm-encode-content-transfer-encoding cte))
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(goto-char (point-min))
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(when headers
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(insert headers))
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(insert "\n"))
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t))
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(defun mml1991-pgg-encrypt (cont &optional sign)
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(goto-char (point-min))
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(when (re-search-forward "^$" nil t)
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(let ((cte (save-restriction
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(narrow-to-region (point-min) (point))
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(mail-fetch-field "content-transfer-encoding"))))
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;; Strip MIME headers since it will be ASCII armoured.
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(forward-line 1)
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(delete-region (point-min) (point))
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(when cte
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(mm-decode-content-transfer-encoding (intern (downcase cte))))))
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(unless (let ((pgg-text-mode t))
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(pgg-encrypt-region
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(point-min) (point-max)
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(split-string
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(or
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(message-options-get 'message-recipients)
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(message-options-set 'message-recipients
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(read-string "Recipients: ")))
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"[ \f\t\n\r\v,]+")
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sign))
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(pop-to-buffer pgg-errors-buffer)
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(error "Encrypt error"))
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(delete-region (point-min) (point-max))
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(insert "\n")
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(insert-buffer-substring pgg-output-buffer)
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t)
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;;;###autoload
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(defun mml1991-encrypt (cont &optional sign)
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(let ((func (nth 2 (assq mml1991-use mml1991-function-alist))))
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(if func
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(funcall func cont sign)
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(error "Cannot find encrypt function"))))
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;;;###autoload
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(defun mml1991-sign (cont)
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(let ((func (nth 1 (assq mml1991-use mml1991-function-alist))))
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(if func
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(funcall func cont)
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(error "Cannot find sign function"))))
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(provide 'mml1991)
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;; Local Variables:
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;; coding: iso-8859-1
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;; End:
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;;; arch-tag: e542be18-ab28-4393-9b33-97fe9cf30706
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;;; mml1991.el ends here
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