mirror of
https://git.savannah.gnu.org/git/emacs.git
synced 2024-11-24 07:20:37 +00:00
7cab80f97c
* gnus-art.el (gnus-bind-safe-url-regexp): Bind mm-w3m-safe-url-regexp to nil when we're in a mml-preview buffer and no group is selected. * mml1991.el (mml1991-mailcrypt-encrypt, mml1991-gpg-encrypt) * mml2015.el (mml2015-gpg-encrypt): Disable multibyte in buffers generated within the mm-with-unibyte-current-buffer macro.
526 lines
17 KiB
EmacsLisp
526 lines
17 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, 2005, 2006,
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;; 2007, 2008, 2009, 2010 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 <http://www.gnu.org/licenses/>.
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;;; Commentary:
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;;; Code:
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;; For Emacs < 22.2.
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(eval-and-compile
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(unless (fboundp 'declare-function) (defmacro declare-function (&rest r)))
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(if (locate-library "password-cache")
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(require 'password-cache)
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(require 'password)))
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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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(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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(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-verbose mml-secure-verbose
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"If non-nil, ask the user about the current operation more verbosely.")
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(defvar mml1991-cache-passphrase mml-secure-cache-passphrase
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"If t, cache passphrase.")
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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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(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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(mm-with-unibyte-current-buffer
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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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;;; gpg wrapper
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(autoload 'gpg-sign-cleartext "gpg")
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(declare-function gpg-sign-encrypt "ext:gpg"
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(plaintext ciphertext result recipients &optional
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passphrase sign-with-key armor textmode))
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(declare-function gpg-encrypt "ext:gpg"
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(plaintext ciphertext result recipients &optional
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passphrase armor textmode))
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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 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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(mm-with-unibyte-current-buffer
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(with-temp-buffer
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(inline (mm-disable-multibyte))
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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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(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 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-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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(defvar mml1991-epg-secret-key-id-list nil)
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(defun mml1991-epg-passphrase-callback (context key-id ignore)
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(if (eq key-id 'SYM)
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(epg-passphrase-callback-function context key-id nil)
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(let* ((entry (assoc key-id epg-user-id-alist))
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(passphrase
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(password-read
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(format "GnuPG passphrase for %s: "
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(if entry
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(cdr entry)
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key-id))
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(if (eq key-id 'PIN)
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"PIN"
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key-id))))
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(when passphrase
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(let ((password-cache-expiry mml1991-passphrase-cache-expiry))
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(password-cache-add key-id passphrase))
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(setq mml1991-epg-secret-key-id-list
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(cons key-id mml1991-epg-secret-key-id-list))
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(copy-sequence passphrase)))))
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(defun mml1991-epg-sign (cont)
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(let ((context (epg-make-context))
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headers cte signers signature)
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(if (eq mm-sign-option 'guided)
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(setq signers (epa-select-keys context "Select keys for signing.
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If no one is selected, default secret key is used. "
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mml1991-signers t))
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(if mml1991-signers
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(setq signers (mapcar (lambda (name)
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(car (epg-list-keys context name t)))
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mml1991-signers))))
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(epg-context-set-armor context t)
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(epg-context-set-textmode context t)
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(epg-context-set-signers context signers)
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(if mml1991-cache-passphrase
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(epg-context-set-passphrase-callback
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context
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#'mml1991-epg-passphrase-callback))
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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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(condition-case error
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(setq signature (epg-sign-string context (buffer-string) 'clear)
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mml1991-epg-secret-key-id-list nil)
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(error
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(while mml1991-epg-secret-key-id-list
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(password-cache-remove (car mml1991-epg-secret-key-id-list))
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(setq mml1991-epg-secret-key-id-list
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(cdr mml1991-epg-secret-key-id-list)))
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(signal (car error) (cdr 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 signature)
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(goto-char (point-min))
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(while (re-search-forward "\r+$" nil t)
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(replace-match "" t t))
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(when cte
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(mm-encode-content-transfer-encoding cte))
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(goto-char (point-min))
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(when headers
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(insert headers))
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(insert "\n"))
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t))
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(defun mml1991-epg-encrypt (cont &optional sign)
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(goto-char (point-min))
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(when (re-search-forward "^$" 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 ((context (epg-make-context))
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(recipients
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(if (message-options-get 'message-recipients)
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(split-string
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(message-options-get 'message-recipients)
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"[ \f\t\n\r\v,]+")))
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cipher signers config)
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;; We should remove this check if epg-0.0.6 is released.
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(if (and (condition-case nil
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(require 'epg-config)
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(error))
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(functionp #'epg-expand-group))
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(setq config (epg-configuration)
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recipients
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(apply #'nconc
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(mapcar (lambda (recipient)
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(or (epg-expand-group config recipient)
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(list recipient)))
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recipients))))
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|
(if (eq mm-encrypt-option 'guided)
|
|
(setq recipients
|
|
(epa-select-keys context "Select recipients for encryption.
|
|
If no one is selected, symmetric encryption will be performed. "
|
|
recipients))
|
|
(setq recipients
|
|
(delq nil (mapcar (lambda (name)
|
|
(car (epg-list-keys context name)))
|
|
recipients))))
|
|
(if mml1991-encrypt-to-self
|
|
(if mml1991-signers
|
|
(setq recipients
|
|
(nconc recipients
|
|
(mapcar (lambda (name)
|
|
(car (epg-list-keys context name)))
|
|
mml1991-signers)))
|
|
(error "mml1991-signers not set")))
|
|
(when sign
|
|
(if (eq mm-sign-option 'guided)
|
|
(setq signers (epa-select-keys context "Select keys for signing.
|
|
If no one is selected, default secret key is used. "
|
|
mml1991-signers t))
|
|
(if mml1991-signers
|
|
(setq signers (mapcar (lambda (name)
|
|
(car (epg-list-keys context name t)))
|
|
mml1991-signers))))
|
|
(epg-context-set-signers context signers))
|
|
(epg-context-set-armor context t)
|
|
(epg-context-set-textmode context t)
|
|
(if mml1991-cache-passphrase
|
|
(epg-context-set-passphrase-callback
|
|
context
|
|
#'mml1991-epg-passphrase-callback))
|
|
(condition-case error
|
|
(setq cipher
|
|
(epg-encrypt-string context (buffer-string) recipients sign)
|
|
mml1991-epg-secret-key-id-list nil)
|
|
(error
|
|
(while mml1991-epg-secret-key-id-list
|
|
(password-cache-remove (car mml1991-epg-secret-key-id-list))
|
|
(setq mml1991-epg-secret-key-id-list
|
|
(cdr mml1991-epg-secret-key-id-list)))
|
|
(signal (car error) (cdr error))))
|
|
(delete-region (point-min) (point-max))
|
|
(insert "\n" cipher))
|
|
t)
|
|
|
|
;;;###autoload
|
|
(defun mml1991-encrypt (cont &optional sign)
|
|
(let ((func (nth 2 (assq mml1991-use mml1991-function-alist))))
|
|
(if func
|
|
(funcall func cont sign)
|
|
(error "Cannot find encrypt function"))))
|
|
|
|
;;;###autoload
|
|
(defun mml1991-sign (cont)
|
|
(let ((func (nth 1 (assq mml1991-use mml1991-function-alist))))
|
|
(if func
|
|
(funcall func cont)
|
|
(error "Cannot find sign function"))))
|
|
|
|
(provide 'mml1991)
|
|
|
|
;; Local Variables:
|
|
;; coding: iso-8859-1
|
|
;; End:
|
|
|
|
;; arch-tag: e542be18-ab28-4393-9b33-97fe9cf30706
|
|
;;; mml1991.el ends here
|