GNU bug report logs - #25947
26.0.50; EasyPG does not honor customized epg-gpg-program

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Message #5 received at submit <at> debbugs.gnu.org (full text, mbox):

From: Jens Lechtenboerger <lechten <at> wi.uni-muenster.de>
To: bug-gnu-emacs <at> gnu.org
Subject: 26.0.50; EasyPG does not honor customized epg-gpg-program
Date: Fri, 03 Mar 2017 12:34:03 +0100

Hi there,

I'm experimenting with Emacs on Qubes OS with Split GPG [0], where I
need to redirect invocations of gpg to qubes-gpg-client-wrapper.
However, customizing epg-gpg-program does not work, recipe from
'emacs -Q':

Check value of epg-gpg-program; in my case, I see gpg2:
C-h v epg-gpg-program

Eval the following:
(setq epg-debug t)
(customize-set-variable 'epg-gpg-program "/bin/echo")

Invoke some EasyPG operation, e.g., encrypt a fresh file:
C-x C-f test.gpg

At this point, the debug buffer " *epg-debug*" shows that
/usr/bin/gpg was invoked for decryption.  Note that this is neither
gpg2 (my machine's default) nor /bin/echo (my customization).

Continue:
M-x spook
C-x C-s
A buffer for key selection opens.  It doesn't matter whether I
select a public key (if there is one) or go for symmetric
encryption.  Leave that buffer:
C-c C-c
Enter a Passphrase (e.g., "test") twice in case of symmetric
encryption.

Notice that an encrypted file has been created.
Buffer " *epg-debug*" shows that /usr/bin/gpg was used for
encryption, not /bin/echo.  It doesn't matter whether I use
customize or setq on epg-gpg-program.

As a workaround, I've got the following in my .emacs:
(require 'epg-config)
(setq epg-gpg-program "/usr/bin/qubes-gpg-client-wrapper")
(push (cons 'OpenPGP (epg-config--make-gpg-configuration epg-gpg-program))
      epg--configurations)

Best wishes
Jens


In GNU Emacs 26.0.50 (build 1, x86_64-unknown-linux-gnu, X toolkit, Xaw3d scroll bars)
 of 2017-02-24 built on debian-8
Repository revision: 91932fff1ded8ed3b4d39dd06891f26960153b9e

[0] https://www.qubes-os.org/doc/split-gpg/

Message #10 received at 25947 <at> debbugs.gnu.org (full text, mbox):

From: Glenn Morris <rgm <at> gnu.org>
To: Jens Lechtenboerger <lechten <at> wi.uni-muenster.de>
Cc: 25947 <at> debbugs.gnu.org, Daiki Ueno <ueno <at> unixuser.com>
Subject: Re: bug#25947: 26.0.50;
 EasyPG does not honor customized epg-gpg-program
Date: Thu, 09 Mar 2017 18:26:58 -0500

Jens Lechtenboerger wrote:

> However, customizing epg-gpg-program does not work, recipe from
> 'emacs -Q':
>
> Check value of epg-gpg-program; in my case, I see gpg2:
> C-h v epg-gpg-program
>
> Eval the following:
> (setq epg-debug t)
> (customize-set-variable 'epg-gpg-program "/bin/echo")
>
> Invoke some EasyPG operation, e.g., encrypt a fresh file:
> C-x C-f test.gpg
>
> At this point, the debug buffer " *epg-debug*" shows that
> /usr/bin/gpg was invoked for decryption.  Note that this is neither
> gpg2 (my machine's default) nor /bin/echo (my customization).

Thanks for the report. How about the following:

--- a/lisp/epg-config.el
+++ b/lisp/epg-config.el
@@ -129,7 +129,8 @@ epg-find-configuration
         (or (and (not no-cache) (alist-get protocol epg--configurations))
             ;; If the executable value is already set with M-x
             ;; customize, use it without checking.
-            (if (and symbol (get symbol 'saved-value))
+            (if (and symbol (or (get symbol 'saved-value)
+                                (get symbol 'customized-value)))
                 (let ((configuration
                        (funcall constructor (symbol-value symbol))))
                   (push (cons protocol configuration) epg--configurations)

Message #13 received at 25947 <at> debbugs.gnu.org (full text, mbox):

From: Jens Lechtenboerger <lechten <at> wi.uni-muenster.de>
To: Glenn Morris <rgm <at> gnu.org>
Cc: 25947 <at> debbugs.gnu.org, Daiki Ueno <ueno <at> unixuser.com>
Subject: Re: bug#25947: 26.0.50;
 EasyPG does not honor customized epg-gpg-program
Date: Fri, 10 Mar 2017 16:09:29 +0100

On 2017-03-09, Glenn Morris wrote:

> Thanks for the report. How about the following:
> [...]

Many thanks, this works for me with customize-set-variable.

However, the initial value of epg-gpg-program (gpg2 in my case) is
still ignored.  (So if one wants to stick with the default value,
that does not work.)

Best wishes
Jens

Message #16 received at 25947 <at> debbugs.gnu.org (full text, mbox):

From: Glenn Morris <rgm <at> gnu.org>
To: Jens Lechtenboerger <lechten <at> wi.uni-muenster.de>
Cc: 25947 <at> debbugs.gnu.org, Daiki Ueno <ueno <at> unixuser.com>
Subject: Re: bug#25947: 26.0.50;
 EasyPG does not honor customized epg-gpg-program
Date: Fri, 10 Mar 2017 14:26:38 -0500

Jens Lechtenboerger wrote:

> However, the initial value of epg-gpg-program (gpg2 in my case) is
> still ignored. 

What version of gpg2 do you have?

Message #19 received at 25947 <at> debbugs.gnu.org (full text, mbox):

From: Jens Lechtenboerger <lechten <at> wi.uni-muenster.de>
To: Glenn Morris <rgm <at> gnu.org>
Cc: 25947 <at> debbugs.gnu.org, Daiki Ueno <ueno <at> unixuser.com>
Subject: Re: bug#25947: 26.0.50;
 EasyPG does not honor customized epg-gpg-program
Date: Sat, 11 Mar 2017 15:05:49 +0100

On March 10, 2017 8:26:38 PM CET, Glenn Morris <rgm <at> gnu.org> wrote:

>What version of gpg2 do you have?

I wont't have access to that machine before Monday, but I see the issue
elsewhere with gnupg 2.0.22. Apparently, only 2.1 versions are used. 
IMHO, the initialization code for epg-gpg-program should check versions.

Best wishes
Jens

Message #22 received at 25947 <at> debbugs.gnu.org (full text, mbox):

From: Glenn Morris <rgm <at> gnu.org>
To: Jens Lechtenboerger <lechten <at> wi.uni-muenster.de>
Cc: 25947 <at> debbugs.gnu.org, Daiki Ueno <ueno <at> unixuser.com>
Subject: Re: bug#25947: 26.0.50;
 EasyPG does not honor customized epg-gpg-program
Date: Sat, 11 Mar 2017 20:27:32 -0500

Jens Lechtenboerger wrote:

> On March 10, 2017 8:26:38 PM CET, Glenn Morris <rgm <at> gnu.org> wrote:
>
>>What version of gpg2 do you have?
>
> I wont't have access to that machine before Monday, but I see the issue
> elsewhere with gnupg 2.0.22. Apparently, only 2.1 versions are used. 

Yes, then it's working as intended if you have gpg2 < 2.1.6.

> IMHO, the initialization code for epg-gpg-program should check versions.

This area has been discussed before in eg https://debbugs.gnu.org/24229 .

I've applied the patch I posted earlier to handle the
customize-set-variable issue as cce29d942dc, and will close this report.

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