Hello,
I use gnupg with a software I write and it needs a gpg key with expiration
date.
As I do not myself manage this software, I would like to provide a shell script
on
Linux (e.g. launched every day with cron) which would check for the expiration
date and send
a warning if key expires within a given time (15 days for example).
Does there exist an option which would give the expiration date of a key, if
such date exists ?
I saw nothing on man gpg.
It is possible to retrieve the expiration date on Linux with a
command line, as shown below, but the command is ugly, not totally safe
(because of the grep) and may not work on all versions of gpg.
Having these keys :
# LANG=C gpg --list-keys
/root/.gnupg/pubring.gpg
------------------------
pub 1024D/E5F2C00E 2008-01-12 [expires: 2009-01-11]
uid test date (test) <[EMAIL PROTECTED]>
sub 2048g/7C17580B 2008-01-12 [expires: 2009-01-11]
pub 1024D/16B870A6 2008-01-12
uid aaaaaa (fdsfsd) <[EMAIL PROTECTED]>
sub 2048g/B2526B84 2008-01-12
Expiration date of key [EMAIL PROTECTED] is :
# LANG=C gpg --list-keys [EMAIL PROTECTED] | grep "\[expires:" | cut -d ":" -f
2 | cut -d " " -f 2 | cut -d "]" -f 1 | head -n 1
2009-01-11
Thanks,
Eric LANDES
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