2009-09-16 09:03:35 -04:00
|
|
|
;;; org-crypt.el --- Public key encryption for org-mode entries
|
|
|
|
|
2009-10-01 14:04:42 -04:00
|
|
|
;; Copyright (C) 2007, 2009 Free Software Foundation, Inc.
|
2009-09-16 09:03:35 -04:00
|
|
|
|
|
|
|
;; Emacs Lisp Archive Entry
|
|
|
|
;; Filename: org-crypt.el
|
2010-01-20 04:13:21 -05:00
|
|
|
;; Version: 6.34trans
|
2009-09-16 09:03:35 -04:00
|
|
|
;; Keywords: org-mode
|
|
|
|
;; Author: John Wiegley <johnw@gnu.org>
|
|
|
|
;; Maintainer: Peter Jones <pjones@pmade.com>
|
|
|
|
;; Description: Adds public key encryption to org-mode buffers
|
|
|
|
;; URL: http://www.newartisans.com/software/emacs.html
|
|
|
|
;; Compatibility: Emacs22
|
|
|
|
|
|
|
|
;; This file is part of GNU Emacs.
|
|
|
|
;;
|
|
|
|
;; GNU Emacs is free software: you can redistribute it and/or modify
|
|
|
|
;; it under the terms of the GNU General Public License as published by
|
|
|
|
;; the Free Software Foundation, either version 3 of the License, or
|
|
|
|
;; (at your option) any later version.
|
|
|
|
|
|
|
|
;; GNU Emacs is distributed in the hope that it will be useful,
|
|
|
|
;; but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
|
|
;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
|
|
;; GNU General Public License for more details.
|
|
|
|
|
|
|
|
;; You should have received a copy of the GNU General Public License
|
|
|
|
;; along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
|
|
|
|
|
|
|
|
;;; Commentary:
|
|
|
|
|
|
|
|
;; Right now this is just a set of functions to play with. It depends
|
|
|
|
;; on the epg library. Here's how you would use it:
|
|
|
|
;;
|
|
|
|
;; 1. To mark an entry for encryption, tag the heading with "crypt".
|
|
|
|
;; You can change the tag to any complex tag matching string by
|
|
|
|
;; setting the `org-crypt-tag-matcher' variable.
|
|
|
|
;;
|
|
|
|
;; 2. Set the encryption key to use in the `org-crypt-key' variable,
|
|
|
|
;; or use `M-x org-set-property' to set the property CRYPTKEY to
|
|
|
|
;; any address in your public keyring. The text of the entry (but
|
|
|
|
;; not its properties or headline) will be encrypted for this user.
|
|
|
|
;; For them to read it, the corresponding secret key must be
|
|
|
|
;; located in the secret key ring of the account where you try to
|
|
|
|
;; decrypt it. This makes it possible to leave secure notes that
|
|
|
|
;; only the intended recipient can read in a shared-org-mode-files
|
|
|
|
;; scenario.
|
|
|
|
;;
|
|
|
|
;; 3. To later decrypt an entry, use `org-decrypt-entries' or
|
|
|
|
;; `org-decrypt-entry'. It might be useful to bind this to a key,
|
|
|
|
;; like C-c C-/. I hope that in the future, C-c C-r can be might
|
|
|
|
;; overloaded to also decrypt an entry if it's encrypted, since
|
|
|
|
;; that fits nicely with the meaning of "reveal".
|
|
|
|
;;
|
|
|
|
;; 4. To automatically encrypt all necessary entries when saving a
|
|
|
|
;; file, call `org-crypt-use-before-save-magic' after loading
|
|
|
|
;; org-crypt.el.
|
|
|
|
;;
|
|
|
|
;; TODO:
|
|
|
|
;; - Allow symmetric encryption as well
|
|
|
|
|
|
|
|
;;; Thanks:
|
|
|
|
|
|
|
|
;; - Carsten Dominik
|
|
|
|
;; - Vitaly Ostanin
|
|
|
|
|
|
|
|
(require 'org)
|
2009-09-16 19:12:15 -04:00
|
|
|
|
|
|
|
(declare-function epg-decrypt-string "epg" (context cipher))
|
|
|
|
(declare-function epg-list-keys "epg" (context &optional name mode))
|
|
|
|
(declare-function epg-make-context "epg"
|
|
|
|
(&optional protocol armor textmode include-certs
|
|
|
|
cipher-algorithm digest-algorithm
|
|
|
|
compress-algorithm))
|
|
|
|
(declare-function epg-encrypt-string "epg"
|
|
|
|
(context plain recipients &optional sign always-trust))
|
2009-09-16 09:03:35 -04:00
|
|
|
|
|
|
|
(defgroup org-crypt nil
|
|
|
|
"Org Crypt"
|
|
|
|
:tag "Org Crypt" :group 'org)
|
|
|
|
|
|
|
|
(defcustom org-crypt-tag-matcher "crypt"
|
|
|
|
"The tag matcher used to find headings whose contents should be
|
|
|
|
encrypted. See the \"Match syntax\" section of the org manual
|
|
|
|
for more details."
|
|
|
|
:type 'string :group 'org-crypt)
|
|
|
|
|
|
|
|
(defcustom org-crypt-key nil
|
|
|
|
"The default key to use when encrypting the contents of a
|
|
|
|
heading. This can also be overridden in the CRYPTKEY property."
|
|
|
|
:type 'string :group 'org-crypt)
|
|
|
|
|
|
|
|
(defun org-crypt-key-for-heading ()
|
|
|
|
"Returns the encryption key for the current heading."
|
|
|
|
(save-excursion
|
|
|
|
(org-back-to-heading t)
|
|
|
|
(or (org-entry-get nil "CRYPTKEY" 'selective)
|
|
|
|
org-crypt-key
|
|
|
|
(and (boundp 'epa-file-encrypt-to) epa-file-encrypt-to)
|
|
|
|
(error "No crypt key set"))))
|
|
|
|
|
|
|
|
(defun org-encrypt-entry ()
|
|
|
|
"Encrypt the content of the current headline."
|
|
|
|
(interactive)
|
2009-09-16 19:12:15 -04:00
|
|
|
(require 'epg)
|
2009-09-16 09:03:35 -04:00
|
|
|
(save-excursion
|
|
|
|
(org-back-to-heading t)
|
|
|
|
(forward-line)
|
|
|
|
(when (not (looking-at "-----BEGIN PGP MESSAGE-----"))
|
|
|
|
(let ((folded (org-invisible-p))
|
|
|
|
(epg-context (epg-make-context nil t t))
|
|
|
|
(crypt-key (org-crypt-key-for-heading))
|
|
|
|
(beg (point))
|
|
|
|
end encrypted-text)
|
|
|
|
(org-end-of-subtree t t)
|
|
|
|
(org-back-over-empty-lines)
|
|
|
|
(setq end (point)
|
|
|
|
encrypted-text
|
|
|
|
(epg-encrypt-string
|
|
|
|
epg-context
|
|
|
|
(buffer-substring-no-properties beg end)
|
|
|
|
(epg-list-keys epg-context crypt-key)))
|
|
|
|
(delete-region beg end)
|
|
|
|
(insert encrypted-text)
|
|
|
|
(when folded
|
|
|
|
(save-excursion
|
|
|
|
(org-back-to-heading t)
|
|
|
|
(hide-subtree)))
|
|
|
|
nil))))
|
|
|
|
|
|
|
|
(defun org-decrypt-entry ()
|
|
|
|
(interactive)
|
2009-09-16 19:12:15 -04:00
|
|
|
(require 'epg)
|
2009-09-16 09:03:35 -04:00
|
|
|
(save-excursion
|
|
|
|
(org-back-to-heading t)
|
|
|
|
(forward-line)
|
|
|
|
(when (looking-at "-----BEGIN PGP MESSAGE-----")
|
|
|
|
(let* ((beg (point))
|
|
|
|
(end (save-excursion
|
|
|
|
(search-forward "-----END PGP MESSAGE-----")
|
|
|
|
(forward-line)
|
|
|
|
(point)))
|
|
|
|
(epg-context (epg-make-context nil t t))
|
|
|
|
(decrypted-text
|
|
|
|
(decode-coding-string
|
|
|
|
(epg-decrypt-string
|
|
|
|
epg-context
|
|
|
|
(buffer-substring-no-properties beg end))
|
|
|
|
'utf-8)))
|
|
|
|
(delete-region beg end)
|
|
|
|
(insert decrypted-text)
|
|
|
|
nil))))
|
|
|
|
|
|
|
|
(defun org-encrypt-entries ()
|
|
|
|
(interactive)
|
|
|
|
(org-scan-tags
|
|
|
|
'org-encrypt-entry
|
|
|
|
(cdr (org-make-tags-matcher org-crypt-tag-matcher))))
|
|
|
|
|
|
|
|
(defun org-decrypt-entries ()
|
|
|
|
(interactive)
|
|
|
|
(org-scan-tags
|
|
|
|
'org-decrypt-entry
|
|
|
|
(cdr (org-make-tags-matcher org-crypt-tag-matcher))))
|
|
|
|
|
|
|
|
(defun org-crypt-use-before-save-magic ()
|
|
|
|
"Adds a hook that will automatically encrypt entries before a
|
|
|
|
file is saved to disk."
|
|
|
|
(add-hook
|
|
|
|
'org-mode-hook
|
|
|
|
(lambda () (add-hook 'before-save-hook 'org-encrypt-entries nil t))))
|
|
|
|
|
|
|
|
(provide 'org-crypt)
|
|
|
|
|
|
|
|
;; arch-tag: 8202ed2c-221e-4001-9e4b-54674a7e846e
|
|
|
|
|
|
|
|
;;; org-crypt.el ends here
|