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187 lines
5.9 KiB
EmacsLisp
187 lines
5.9 KiB
EmacsLisp
;;; epa-mail.el --- the EasyPG Assistant, minor-mode for mail composer
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;; Copyright (C) 2006, 2007, 2008, 2009 Free Software Foundation, Inc.
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;; Author: Daiki Ueno <ueno@unixuser.org>
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;; Keywords: PGP, GnuPG, mail, message
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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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;;; Code:
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(require 'epa)
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(require 'mail-utils)
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(defvar epa-mail-mode-map
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(let ((keymap (make-sparse-keymap)))
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(define-key keymap "\C-c\C-ed" 'epa-mail-decrypt)
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(define-key keymap "\C-c\C-ev" 'epa-mail-verify)
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(define-key keymap "\C-c\C-es" 'epa-mail-sign)
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(define-key keymap "\C-c\C-ee" 'epa-mail-encrypt)
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(define-key keymap "\C-c\C-ei" 'epa-mail-import-keys)
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(define-key keymap "\C-c\C-eo" 'epa-insert-keys)
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keymap))
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(defvar epa-mail-mode-hook nil)
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(defvar epa-mail-mode-on-hook nil)
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(defvar epa-mail-mode-off-hook nil)
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;;;###autoload
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(define-minor-mode epa-mail-mode
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"A minor-mode for composing encrypted/clearsigned mails."
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nil " epa-mail" epa-mail-mode-map)
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(defun epa-mail--find-usable-key (keys usage)
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"Find a usable key from KEYS for USAGE."
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(catch 'found
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(while keys
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(let ((pointer (epg-key-sub-key-list (car keys))))
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(while pointer
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(if (and (memq usage (epg-sub-key-capability (car pointer)))
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(not (memq (epg-sub-key-validity (car pointer))
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'(revoked expired))))
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(throw 'found (car keys)))
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(setq pointer (cdr pointer))))
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(setq keys (cdr keys)))))
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;;;###autoload
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(defun epa-mail-decrypt ()
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"Decrypt OpenPGP armors in the current buffer.
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The buffer is expected to contain a mail message.
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Don't use this command in Lisp programs!"
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(interactive)
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(epa-decrypt-armor-in-region (point-min) (point-max)))
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;;;###autoload
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(defun epa-mail-verify ()
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"Verify OpenPGP cleartext signed messages in the current buffer.
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The buffer is expected to contain a mail message.
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Don't use this command in Lisp programs!"
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(interactive)
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(epa-verify-cleartext-in-region (point-min) (point-max)))
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;;;###autoload
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(defun epa-mail-sign (start end signers mode)
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"Sign the current buffer.
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The buffer is expected to contain a mail message.
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Don't use this command in Lisp programs!"
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(interactive
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(save-excursion
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(goto-char (point-min))
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(if (search-forward mail-header-separator nil t)
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(forward-line))
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(setq epa-last-coding-system-specified
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(or coding-system-for-write
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(epa--select-safe-coding-system (point) (point-max))))
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(let ((verbose current-prefix-arg))
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(list (point) (point-max)
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(if verbose
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(epa-select-keys (epg-make-context epa-protocol)
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"Select keys for signing.
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If no one is selected, default secret key is used. "
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nil t))
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(if verbose
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(epa--read-signature-type)
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'clear)))))
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(epa-sign-region start end signers mode))
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;;;###autoload
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(defun epa-mail-encrypt (start end recipients sign signers)
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"Encrypt the current buffer.
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The buffer is expected to contain a mail message.
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Don't use this command in Lisp programs!"
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(interactive
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(save-excursion
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(let ((verbose current-prefix-arg)
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(context (epg-make-context epa-protocol))
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recipients recipient-key)
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(goto-char (point-min))
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(save-restriction
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(narrow-to-region (point)
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(if (search-forward mail-header-separator nil 0)
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(match-beginning 0)
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(point)))
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(setq recipients
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(mail-strip-quoted-names
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(mapconcat #'identity
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(nconc (mail-fetch-field "to" nil nil t)
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(mail-fetch-field "cc" nil nil t)
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(mail-fetch-field "bcc" nil nil t))
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","))))
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(if recipients
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(setq recipients (delete ""
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(split-string recipients "[ \t\n]+"))))
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(goto-char (point-min))
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(if (search-forward mail-header-separator nil t)
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(forward-line))
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(setq epa-last-coding-system-specified
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(or coding-system-for-write
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(epa--select-safe-coding-system (point) (point-max))))
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(list (point) (point-max)
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(if verbose
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(epa-select-keys
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context
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"Select recipients for encryption.
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If no one is selected, symmetric encryption will be performed. "
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recipients)
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(if recipients
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(mapcar
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(lambda (recipient)
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(setq recipient-key
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(epa-mail--find-usable-key
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(epg-list-keys
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(epg-make-context epa-protocol)
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(concat "<" recipient ">"))
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'encrypt))
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(unless (or recipient-key
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(y-or-n-p
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(format
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"No public key for %s; skip it? "
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recipient)))
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(error "No public key for %s" recipient))
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recipient-key)
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recipients)))
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(setq sign (if verbose (y-or-n-p "Sign? ")))
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(if sign
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(epa-select-keys context
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"Select keys for signing. "))))))
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(epa-encrypt-region start end recipients sign signers))
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;;;###autoload
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(defun epa-mail-import-keys ()
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"Import keys in the OpenPGP armor format in the current buffer.
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The buffer is expected to contain a mail message.
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Don't use this command in Lisp programs!"
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(interactive)
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(epa-import-armor-in-region (point-min) (point-max)))
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;;;###autoload
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(define-minor-mode epa-global-mail-mode
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"Minor mode to hook EasyPG into Mail mode."
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:global t :init-value nil :group 'epa-mail :version "23.1"
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(remove-hook 'mail-mode-hook 'epa-mail-mode)
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(if epa-global-mail-mode
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(add-hook 'mail-mode-hook 'epa-mail-mode)))
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(provide 'epa-mail)
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;; arch-tag: a6f82b3f-d177-4a11-af95-040da55927d2
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;;; epa-mail.el ends here
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