export-filter question or bug

[Erich Eckner]

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Hash: SHA256

Hi,

I'm using the following command to export keys for wkd:

$GPG --export --export-filter keep-uid="mbox = $mbox" $fpr

However, this creates funny results for the key for 
buildmaster at archlinux32.org which is downloadable here: 
https://archlinux32.org/keys.php?k=2E29129B8C684FE7A959C422714A1770ECE2DF62

Is my filtering wrong or is this some bug in gpg?

To reproduce the issue, run:

tmp_dir=$(mktemp -d)
GPG='gpg --homedir '"$tmp_dir"
curl 'https://archlinux32.org/keys.php?k=2E29129B8C684FE7A959C422714A1770ECE2DF62' | $GPG --import
$GPG --export --export-filter keep-uid="mbox = buildmaster at archlinux32.org" 2E29129B8C684FE7A959C422714A1770ECE2DF62 | gpg

this gives:

pub   rsa4096 2017-06-23 [SC] [expired: 2019-06-23]
       2E29129B8C684FE7A959C422714A1770ECE2DF62
uid           buildmaster <buildmaster at archlinux32.org>
sub   rsa4096 2017-06-23 [S] [expired: 2021-12-31]

(note the expired pub, thus the whole key is considered expired)

However, skipping the --export-filter:

$GPG --export 2E29129B8C684FE7A959C422714A1770ECE2DF62 | gpg

gives the correct expiration:

pub   rsa4096 2017-06-23 [SC] [expires: 2021-12-31]
       2E29129B8C684FE7A959C422714A1770ECE2DF62
uid           buildmaster <buildmaster at archlinux32.org>
uid           archlinux32 repository signing key <repositories at archlinux32.org>
sub   rsa4096 2017-06-23 [S] [expires: 2021-12-31]

This is not usable for wkd for me, because it contains all uids (of 
course).

Thanks in advance,
Erich

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