GPGME: looking for keys with respect to user settings

[Andre Heinecke]

Hi,

On Friday, July 6, 2018 9:49:56 PM CEST Wiktor Kwapisiewicz via Gnupg-devel 
wrote:
> I'm trying to replicate `gpg --locate-keys $EMAIL` using GPGME and have 
> one question.
> 
> I'm using `gpgme_op_keylist_ext_start` for starting the search and want 
> to search using whatever is configured in gpg.conf or defaults.

You do it right. GPGME_KEYLIST_MODE_LOCATE (or an or of local and extern) uses 
what is configured in auto-key-locate options. ( Be aware that since 2.1.23 WKD 
is used by default)

> `gpgme_set_keylist_mode` [0] seems to take several flags such as 
> GPGME_KEYLIST_MODE_LOCATE but it's a combination of LOCAL and EXTERN 
> search (in case of e-mail address that would be WKD).

Right.

> If I don't specify mode it looks like it's always using LOCAL even if I 
> explicitly set "auto-key-locate local,wkd" in .gnupg/gpg.conf

Yes. LOCAL is default. So if you don't specify a mode it just does a local 
keylist.

To clarify:
LOCAL means "--list-keys"
EXTERN means "--search"
EXTERN | LOCAL means "--locate-key"

> Is this by design that keylist_mode is not set to what is used by 
> --locate-key? (that is GPGME is not using settings used by gpg)

No, I think it's a misunderstanding. To better understand what is going on I 
recommend:

export GPGME_DEBUG=9:/tmp/gpgme.log

when testing. Then you can see exactly which calls are made to GnuPG by GPGME.

> A little bit of context: I'm trying to add WKD search in mutt (in case 
> someone enables explicitly encryption and doesn't have the key locally) 
> but a valid question was raised, why isn't GPGME already using what the 
> user has configured in their gpg.conf.

As stated above, it is. The next Version will be the first with which you can 
specify "auto-key-locate" options in GPGME ( https://dev.gnupg.org/D463 ) 
currently GPGME does not touch auto-key-locate at all.

Best Regards,
Andre

-- 
Andre Heinecke |  ++49-541-335083-262  | http://www.intevation.de/
Intevation GmbH, Neuer Graben 17, 49074 Osnabrück | AG Osnabrück, HR B 18998
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