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+---
+title: "Renewing my GPG Keys"
+date: 2023-12-28T11:46:33-05:00
+draft: false
+tags: []
+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