Re: [O] org-crypt: Secure encrypted message against inadvertent change

[AW]

Am Sonntag, 23. August 2015, 19:54:51 schrieb John Kitchin:
> I am not sure if you put the comment on this post:
> http://kitchingroup.cheme.cmu.edu/blog/2014/09/13/Make-some-org-sections-rea
> d-only/
> 
> but it is possible to setup a hook that makes headings read-only. You
> could do that for headings tagged crypt, for example.

Dear John,

thank you. I simply changed "read_only" to "crypt" in the functions you 
developed. This functions prevent a change of encrypted text, which I think is 
really an improvment.

===================

(defun org-mark-readonly ()
  (interactive)
  (org-map-entries
   (lambda ()
     (let* ((element (org-element-at-point))
            (begin (org-element-property :begin element))
            (end (org-element-property :end element)))
       (add-text-properties begin (- end 1) '(read-only t))))
   "crypt")
 (message "Made readonly!"))


(defun org-remove-readonly ()
  (interactive)
  (org-map-entries
   (lambda ()
     (let* ((element (org-element-at-point))
            (begin (org-element-property :begin element))
            (end (org-element-property :end element))
            (inhibit-read-only t))
         (remove-text-properties begin (- end 1) '(read-only t))))
     "crypt"))

(add-hook 'org-mode-hook 'org-mark-readonly)


===================

Thus before I can use "org-decrypt-entry" I have to put the cursor under the 
headline with the tag ":crypt:" and call "org-remove-readonly".

I  S U G G E S T  to  put this into org-crypt and change the commands org-
decrypt-entry and org-encrypt-entry: Encrypted text shall be read-only, and 
org-decrypt-entry removes this.

Sorry, I'm a user without knowledge of Lisp, unfortunately I can't do that 
myself. But it would be a valuable improvement of org-crypt.

Regards,

Alexander

> 
> AW writes:
> > I'm using org-crypt. All text below a heading with the tag :crypt: becomes
> > encrypted with saving the file and looks like this:
> > 
> > -----BEGIN PGP MESSAGE-----
> > Version: GnuPG v2
> > 
> > hQEOAxn9DjwjX2oYEAQAgLl/58dss1VVgmRb1rGIaNV2I5P+smcDjhWa5/arTMPE
> > 9wjxHUpU/HSflCwnV5609H3J9ZSVubCpaUbV3Da0jnDUJuljFbSqapRym1PW0hFn
> > ApfLwze3HTj+A3eODf+p3kbDjFnII9Rfn7lWQ/6OmMrisQbvbsWzS3K/crgqu+cD
> > /j6m3nDURonKGStv5h7sgaSRuLGzqXvHXEnS+d1ad1ZomgTD4abZNvDYt9Y039FE
> > xYwRphWSBs+vtQ34resZewCa4s7h5SES5j839vQPWI4VyA4uRrfzYATHnHtoxfwA
> > RQWzUTeS16FFBxnjqqTXGXqH9go25Ovnl1Np9c2H7veH0lQB/hpwGbUJRnYCx5Nd
> > UlZ/U+aKQJl3aD+ulgOxJhTQNb9ToXxMpwS3FitsZHVh8OaRBLdgjRVFstWw3NhT
> > RTQ3Og0+ts34iKW+u+2ock/LqiDYFx4=
> > =+xma
> > -----END PGP MESSAGE-----
> > 
> > I really hope this example will not irritate your email software.
> > 
> > My notebook has one of those large touchpads and once in a while I hit it
> > and go on with typing, but the cursor shifted to text somewhere else and
> > I'm adding letters to a completely different paragraph, before I notice
> > and correct it.
> > 
> > Well, this evening I added some letters inadvertently inside a PGP
> > message,
> > because the touchpad shifted to cursor to an encrypted paragraph. If I
> > saved the file, the encrypted paragraph would have become un-decryptable
> > (I tested this: decrypting no longer is possible).
> > 
> > Unfortunately I won't always realise what happened, e.g. if I don't watch
> > while dictating into a speech recognition (Dragon Nat. Speak.).
> > 
> > And the encrypted parts are not needed often. So the destroyed PGP message
> > might make it into my backups and if I try to encrypt it a year later...
> > 
> > Why isn't the text between
> > 
> > -----BEGIN PGP MESSAGE-----
> > 
> > and
> > 
> > -----END PGP MESSAGE-----
> > 
> > read-only as a default ?
> > 
> > Really, an inadvertent change can destroy valuable information and it i
> 
> --
> Professor John Kitchin
> Doherty Hall A207F
> Department of Chemical Engineering
> Carnegie Mellon University
> Pittsburgh, PA 15213
> 412-268-7803
> @johnkitchin
> http://kitchingroup.cheme.cmu.edu