gpg decryption

gpg decryption

[Sebastian Spaeth]

My bank frequently sends me transactions as an inline-armored gpg
encrypted text. So I added the below 2 lines in my .emacs and added this
function to the list of notmuch-show-hook functions:

(defun spaetz/decrypt ()
  (epa-decrypt-armor-in-region (point-min) (point-max)))

Despite warning in the docs that this function should not be called from
elisp programs directly, it works just fine for me. The only annoyance
is that the function asks "Should I replace the current text (y/n)" in
the status bar whenever it detects gpg text.
It works for me and is a nice proof-of-concept which happens to solve my bank
account itch, but definitely needs improvement:

- We just feed it the whole notmuch-show buffer, it would be nicer to
hand it the just the region of the message body/mime part. I wonder, if
things like this should not better be done with dme's message-washing
hooks rather than a notmuch-show hook?  

- The annoying "should I replace the current text" question should not
appear, ie we need to use some more low-level functionality and
implement mime part "cleaning".

- This will not handle encrypted text as an mime attachment, I guess.

No clue, just tossing this out for now.

Sebastian

Re: gpg decryption

[Sebastian Spaeth]

On 2010-03-08, Sebastian Spaeth wrote:
> My bank frequently sends me transactions as an inline-armored gpg
> encrypted text. So I added the below 2 lines in my .emacs and added this
> function to the list of notmuch-show-hook functions:
> 
> (defun spaetz/decrypt ()
>   (epa-decrypt-armor-in-region (point-min) (point-max)))

Uhh, and you will have to load somehow the "epa" library that comes with
emacs included. I use the below in my .emacs

;enable gpg integration for transparent .gpg file decryption
(require 'epa-file)
(epa-file-enable)

Re: gpg decryption

[Jameson Rollins]

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On Mon, 08 Mar 2010 12:49:54 +0100, "Sebastian Spaeth" <Sebastian@SSpaeth.de> wrote:
> My bank frequently sends me transactions as an inline-armored gpg
> encrypted text.

Wow!  That's incredible.  I assume this is a German Bank?  Only in my
wildest fantasies could I even conceive of such a thing possibly
happening, especially in the US.  I want to use your bank.

> So I added the below 2 lines in my .emacs and added this function to
> the list of notmuch-show-hook functions:

> (defun spaetz/decrypt ()
>   (epa-decrypt-armor-in-region (point-min) (point-max)))
> 
> Despite warning in the docs that this function should not be called from
> elisp programs directly, it works just fine for me. The only annoyance
> is that the function asks "Should I replace the current text (y/n)" in
> the status bar whenever it detects gpg text.
> It works for me and is a nice proof-of-concept which happens to solve my bank
> account itch, but definitely needs improvement:

Do I've had problems with notmuch if I answer "yes" to the replace
current text question.  It appears to actually modify the file being
decrypted, which in this case is the actual mail message, and that seems
to cause problems for notmuch.  I actually want the text to be replaced,
but just in the buffer, and not in the file.  I haven't looked into this
yet though.

We really need to get some better PGP/MIME support in the emacs UI.
Unfortunately I just haven't had the time to work on it.  I'm at least
glad that other are struggling with it as well, so it's not just me.

jamie.

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Re: gpg decryption

[Sebastian Spaeth]

On 2010-03-08, Sebastian Spaeth wrote:
> On Mon, 08 Mar 2010 12:49:54 +0100, "Sebastian Spaeth" <Sebastian@SSpaeth.de> wrote:
> > My bank frequently sends me transactions as an inline-armored gpg
> > encrypted text.
> 
> Wow!  That's incredible.  I assume this is a German Bank?  Only in my
> wildest fantasies could I even conceive of such a thing possibly
> happening, especially in the US.  I want to use your bank.

Yep, its a German bank (online branch of a state-owned bank, actually).
 
> Do I've had problems with notmuch if I answer "yes" to the replace
> current text question.  It appears to actually modify the file being
> decrypted, which in this case is the actual mail message, and that seems
> to cause problems for notmuch.  I actually want the text to be replaced,
> but just in the buffer, and not in the file.  I haven't looked into this
> yet though.

This is weird, as it seems to work fine for me. Answering 'yes' replaces
the text in the buffer with the unencrypted version, but it leaves the
mail file as it is. 

> We really need to get some better PGP/MIME support in the emacs UI.

I agree, having better GPG support would be a real killer feature.

Sebastian