Hey Heather, it's me again.
Well, it’s that time of year again. Where I’ve mostly forgotten I have gpg keys set up somewhere and my system is subtly being weird, and then some software tells me explicitly:
gpg: WARNING: Your encryption subkey expires soon.
Oh. Right. Thanks.
I seem to always forget the commands. And sure, I could read the man gpg and
figure it out again in the future. It’s simple enough. But I just want the
operations in order. So this post is basically my notes for next time.
$ gpg --list-secret-keys
/path/to/.gnupg/pubring.kbx
---------------------------------
sec rsa2048 1955-11-05 [SC] [expired: 2022-10-26]
0123456789ABCDEFGHIKKLMNOPQRSTUVWXYZ9876
uid [ expired] Aname <and@email.com>
$ gpg --edit-key Aname
gpg (GnuPG) 2.2.40; Copyright (C) 2022 g10 Code GmbH
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.
Secret key is available.
sec rsa2048/OPQRSTUVWXYZ9876
created: 1955-11-05 expired: 2022-10-26 usage: SC
trust: ultimate validity: expired
ssb rsa2048/41PH4NUM3R53R135
created: 1955-11-06 expired: 2022-10-26 usage: E
[ expired] (1). Aname <and@email.com>
gpg> expire
Changing expiration time for the primary key.
Please specify how long the key should be valid.
0 = key does not expire
<n> = key expires in n days
<n>w = key expires in n weeks
<n>m = key expires in n months
<n>y = key expires in n years
Key is valid for? (0) 365
Key expires at Thu 26 Oct 2023 01:35:00 AM EST
Is this correct? (y/N) y
sec rsa2048/OPQRSTUVWXYZ9876
created: 1955-11-05 expired: 2023-10-26 usage: SC
trust: ultimate validity: ultimate
ssb rsa2048/41PH4NUM3R53R135
created: 1955-11-05 expired: 2022-10-26 usage: E
[ultimate] (1). Aname <and@email.com>
gpg: WARNING: Your encryption subkey expires soon.
gpg: You may want to change its expiration date too.
gpg> key 1
sec rsa2048/OPQRSTUVWXYZ9876
created: 1955-11-05 expired: 2023-10-26 usage: SC
trust: ultimate validity: ultimate
ssb* rsa2048/41PH4NUM3R53R135
created: 1955-11-05 expired: 2022-10-26 usage: E
[ultimate] (1). Aname <and@email.com>
gpg> expire
Changing expiration time for a subkey.
Please specify how long the key should be valid.
0 = key does not expire
<n> = key expires in n days
<n>w = key expires in n weeks
<n>m = key expires in n months
<n>y = key expires in n years
Key is valid for? (0) 1y
Key expires at Thu 26 Oct 2023 01:35:00 AM EST
Is this correct? (y/N) y
sec rsa2048/OPQRSTUVWXYZ9876
created: 1955-11-05 expired: 2023-10-26 usage: SC
trust: ultimate validity: ultimate
ssb* rsa2048/41PH4NUM3R53R135
created: 1955-11-05 expired: 2023-10-26 usage: E
[ultimate] (1). Aname <and@email.com>
gpg> save
Don’t forget to save!