mirror of
https://github.com/Brandon-Rozek/website.git
synced 2024-11-28 19:53:38 -05:00
126 lines
4 KiB
Markdown
126 lines
4 KiB
Markdown
---
|
|
title: "Renewing my GPG Keys"
|
|
date: 2023-12-28T11:46:33-05:00
|
|
draft: false
|
|
tags:
|
|
- GPG/PGP
|
|
math: false
|
|
medium_enabled: false
|
|
---
|
|
|
|
Recently I let my GPG keys expire. I noticed this when I was working on a project, and when I went to [automatically sign my commits](/blog/signingcommits/) -- git threw an error at me. Since I was working at the time, I did the not-so-great practice of disabling the signing feature.
|
|
|
|
Having keys automatically expire is annoying. Though, it does give me a chance to reflect if these keys are still useful to me. Currently I use GPG keys for:
|
|
|
|
- Code signing
|
|
- Receiving encrypted messages
|
|
- [Decentralized Identity](/blog/decentralized-identity-pgp-keyoxide/)
|
|
|
|
So to me, having a GPG key is still worth it. Now to go about renewing my keys. This post will show how I go about the renewing process itself and what services I update. Mostly for me in the future.
|
|
|
|
## Renewing my GPG key
|
|
|
|
First, find your key
|
|
|
|
```bash
|
|
gpg --list-keys
|
|
```
|
|
|
|
```
|
|
/home/brandon/.gnupg/pubring.kbx
|
|
------------------------------
|
|
pub ed25519 2022-12-14 [SC] [expires: 2023-12-14]
|
|
5F37830BFA46FF7881F47AC78DF79C3DC5FC658A
|
|
uid [ultimate] Brandon Rozek <brozek@brandonrozek.com>
|
|
uid [ultimate] Brandon Rozek <hello@brandonrozek.com>
|
|
sub cv25519 2022-12-14 [E] [expires: 2023-12-14]
|
|
sub dsa2048 2022-12-17 [S] [expires: 2023-12-14]
|
|
```
|
|
|
|
The fingerprint is the line below `pub` and for me starts with `5F37`. Let's store that in a variable for easy reference later.
|
|
|
|
```bash
|
|
export FPR=5F37830BFA46FF7881F47AC78DF79C3DC5FC658A
|
|
```
|
|
|
|
If we want to extend the expiration date to a year from today, we can use the following command:
|
|
|
|
```bash
|
|
gpg --quick-set-expire $FPR 1y
|
|
```
|
|
|
|
Alternatively, you can specify an exact date with the ISO format `YYYY-MM-DD` or keep it relative with respect to days `d`, weeks `w`, and months `m`.
|
|
|
|
When we check the key again, we should see an updated expiration date
|
|
|
|
```bash
|
|
gpg --list-keys
|
|
```
|
|
|
|
```
|
|
/home/brandon/.gnupg/pubring.kbx
|
|
------------------------------
|
|
pub ed25519 2022-12-14 [SC] [expires: 2024-12-28]
|
|
5F37830BFA46FF7881F47AC78DF79C3DC5FC658A
|
|
uid [ultimate] Brandon Rozek <brozek@brandonrozek.com>
|
|
uid [ultimate] Brandon Rozek <hello@brandonrozek.com>
|
|
sub cv25519 2022-12-14 [E] [expires: 2023-12-14]
|
|
sub dsa2048 2022-12-17 [S] [expires: 2023-12-14]
|
|
```
|
|
|
|
Notice that the two subkeys still have the old expiration date. We'll need to update that as well. We'll need to get their fingergrints with the following command
|
|
|
|
```bash
|
|
gpg --list-keys --verbose --with-subkey-fingerprints
|
|
```
|
|
|
|
```
|
|
gpg: enabled compatibility flags:
|
|
gpg: using pgp trust model
|
|
/home/rozek/.gnupg/pubring.kbx
|
|
------------------------------
|
|
pub ed25519 2022-12-14 [SC] [expires: 2024-12-27]
|
|
5F37830BFA46FF7881F47AC78DF79C3DC5FC658A
|
|
uid [ultimate] Brandon Rozek <brozek@brandonrozek.com>
|
|
uid [ultimate] Brandon Rozek <hello@brandonrozek.com>
|
|
sub cv25519 2022-12-14 [E] [expires: 2023-12-14]
|
|
D502A12A65F9997DAE4609C97DAEAD7BFFA8F9D3
|
|
sub dsa2048 2022-12-17 [S] [expires: 2023-12-14]
|
|
89859D1EDF70D6DC2F6BFFF226E457DA82C9F480
|
|
```
|
|
|
|
Store the fingerprints again for easy reference:
|
|
|
|
```bash
|
|
export SFPR1=D502A12A65F9997DAE4609C97DAEAD7BFFA8F9D3
|
|
export SFPR2=89859D1EDF70D6DC2F6BFFF226E457DA82C9F480
|
|
```
|
|
|
|
Extend the expiration of the subkeys:
|
|
|
|
```bash
|
|
gpg --quick-set-expire $FPR 1y $SFPR1
|
|
gpg --quick-set-expire $FPR 1y $SFPR2
|
|
```
|
|
|
|
|
|
|
|
## Updating Services
|
|
|
|
I currently allow for two ways to query my keys: OpenGPG keyserver and WKD. To update my keys on my own WKD keyserver, I followed the steps in my [tutorial on WKD](/blog/decentralized-pgp-keys-wkd).
|
|
|
|
For OpenGPG, I followed the instructions on their [usage page](https://keys.openpgp.org/about/usage):
|
|
|
|
```bash
|
|
gpg --export your_address@example.net | curl -T - https://keys.openpgp.org
|
|
```
|
|
|
|
## References
|
|
|
|
https://www.gnupg.org/documentation/manuals/gnupg24/gpg.1.html
|
|
|
|
https://whynothugo.nl/journal/2023/07/13/extending-an-expired-gpg-key/
|
|
|
|
https://brandonrozek.com/blog/decentralized-pgp-keys-wkd/
|
|
|
|
https://keys.openpgp.org/about/usage
|