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Most of this change is to boilerplate commentary such as license URLs. This change was prompted by ftp://ftp.gnu.org's going-away party, planned for November. Change these FTP URLs to https://ftp.gnu.org instead. Make similar changes for URLs to other organizations moving away from FTP. Also, change HTTP to HTTPS for URLs to gnu.org and fsf.org when this works, as this will further help defend against man-in-the-middle attacks (for this part I omitted the MS-DOS and MS-Windows sources and the test tarballs to keep the workload down). HTTPS is not fully working to lists.gnu.org so I left those URLs alone for now.
334 lines
10 KiB
EmacsLisp
334 lines
10 KiB
EmacsLisp
;;; mml1991.el --- Old PGP message format (RFC 1991) support for MML
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;; Copyright (C) 1998-2017 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 of the License, or
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;; (at your option) 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. If not, see <https://www.gnu.org/licenses/>.
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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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(require 'mm-encode)
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(require 'mml-sec)
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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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(autoload 'mm-decode-content-transfer-encoding "mm-bodies")
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(autoload 'mm-encode-content-transfer-encoding "mm-bodies")
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(autoload 'message-options-get "message")
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(autoload 'message-options-set "message")
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(require 'mml2015)
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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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(pgg mml1991-pgg-sign
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mml1991-pgg-encrypt)
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(epg mml1991-epg-sign
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mml1991-epg-encrypt))
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"Alist of PGP functions.")
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(defvar mml1991-cache-passphrase mml-secure-cache-passphrase
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"If t, cache passphrase.")
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(make-obsolete-variable 'mml1991-cache-passphrase
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'mml-secure-cache-passphrase
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"25.1")
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(defvar mml1991-passphrase-cache-expiry mml-secure-passphrase-cache-expiry
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"How many seconds the passphrase is cached.
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Whether the passphrase is cached at all is controlled by
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`mml1991-cache-passphrase'.")
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(make-obsolete-variable 'mml1991-passphrase-cache-expiry
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'mml-secure-passphrase-cache-expiry
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"25.1")
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(defvar mml1991-signers nil
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"A list of your own key ID which will be used to sign a message.")
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(defvar mml1991-encrypt-to-self nil
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"If t, add your own key ID to recipient list when encryption.")
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;;; mailcrypt wrapper
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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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(declare-function mc-encrypt-generic "ext:mc-toplev"
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(&optional recipients scheme start end from sign))
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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 ARMORED
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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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(with-temp-buffer
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(inline (mm-disable-multibyte))
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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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;; pgg wrapper
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(autoload 'pgg-sign-region "pgg")
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(autoload 'pgg-encrypt-region "pgg")
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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 "^$" nil t)
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(setq headers (buffer-substring (point-min) (point)))
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(save-restriction
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(narrow-to-region (point-min) (point))
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(setq cte (mail-fetch-field "content-transfer-encoding")))
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(forward-line 1)
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(delete-region (point-min) (point))
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(when cte
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(setq cte (intern (downcase cte)))
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(mm-decode-content-transfer-encoding cte)))
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(unless (pgg-sign-region (point-min) (point-max) t)
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(pop-to-buffer pgg-errors-buffer)
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(error "Encrypt error"))
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(delete-region (point-min) (point-max))
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(insert
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(with-temp-buffer
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(set-buffer-multibyte nil)
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(insert-buffer-substring pgg-output-buffer)
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(goto-char (point-min))
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(while (re-search-forward "\r+$" 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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(buffer-string)))
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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 armored.
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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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;; epg wrapper
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(defvar epg-user-id-alist)
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(autoload 'epg-make-context "epg")
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(autoload 'epg-passphrase-callback-function "epg")
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(autoload 'epa-select-keys "epa")
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(autoload 'epg-list-keys "epg")
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(autoload 'epg-context-set-armor "epg")
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(autoload 'epg-context-set-textmode "epg")
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(autoload 'epg-context-set-signers "epg")
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(autoload 'epg-context-set-passphrase-callback "epg")
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(autoload 'epg-key-sub-key-list "epg")
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(autoload 'epg-sub-key-capability "epg")
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(autoload 'epg-sub-key-validity "epg")
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(autoload 'epg-sub-key-fingerprint "epg")
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(autoload 'epg-sign-string "epg")
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(autoload 'epg-encrypt-string "epg")
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(autoload 'epg-configuration "epg-config")
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(autoload 'epg-expand-group "epg-config")
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(defun mml1991-epg-sign (cont)
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(let ((inhibit-redisplay t)
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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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(let* ((pair (mml-secure-epg-sign 'OpenPGP 'clear))
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(signature (car pair)))
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(delete-region (point-min) (point-max))
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(insert
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(with-temp-buffer
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(set-buffer-multibyte nil)
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(insert signature)
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(goto-char (point-min))
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(while (re-search-forward "\r+$" nil t)
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(replace-match "" t t))
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(when cte
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(mm-encode-content-transfer-encoding cte))
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(goto-char (point-min))
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(when headers
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(insert headers))
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(insert "\n")
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(buffer-string)))
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t)))
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(defun mml1991-epg-encrypt (cont &optional sign)
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(goto-char (point-min))
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(when (re-search-forward "^$" 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 armored.
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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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(let ((cipher (mml-secure-epg-encrypt 'OpenPGP cont sign)))
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(delete-region (point-min) (point-max))
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(insert "\n" cipher))
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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: utf-8
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;; End:
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;;; mml1991.el ends here
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