On Wed, Dec 26 2012, Adam Sjøgren wrote:

> On Wed, 26 Dec 2012 01:33:33 +0100, Adam wrote:
>
>> So, I'm kind of stuck on that.
>
> Skipping the first 16 bytes and using a non-multibyte buffer on the way
> makes it work with --attribute-fd:
>
> (defun epg-key-image (key-id)
>   "Return the image of a key, if any"
>   (with-temp-buffer
>     (set-buffer-multibyte nil)
>     (let* ((coding-system-for-write 'binary)
>            (coding-system-for-read 'binary)
>            (data (shell-command-to-string (concat epg-gpg-program
>                                                   " --attribute-fd 2"
>                                                   " --list-keys " key-id " >/dev/null"))))
>       (when (> (length data) 0)
>         (insert (substring data 16))
>         (create-image (buffer-string) nil t)))))


The following change is needed otherwise I get error reading my mail:

diff --git a/lisp/mml2015.el b/lisp/mml2015.el
index 0bc83ad..19c55f9 100644
--- a/lisp/mml2015.el
+++ b/lisp/mml2015.el
@@ -829,7 +829,8 @@ If set, it overrides the setting of `mml2015-sign-with-sender'."
            (data (shell-command-to-string
                   (format "%s --list-options no-show-photos --attribute-fd 2 --list-keys %s > /dev/null"
                           epg-gpg-program key-id))))
-      (when (> (length data) 0)
+      (when (and (> (length data) 0)
+                 (not (string-match "^gpg: error reading key: public key not found$" data)))
         (insert (substring data 16))
         (create-image (buffer-string) nil t)))))
 

I'll install it unless you have a better fix.

-- 
Julien Danjou
// Free Software hacker & freelance
// http://julien.danjou.info