wireguard: module and peers configurations

Add a new module to automatically configure the peers for wireguard. The
module needs a configuration file (in `configs/wireguard.toml`) which
lists all the peers, their IP and and their public keys. The secret keys
is encrypted as a secret with agenix.

There's some initial documentation on how to use this setup.

1 files changed, 21 insertions, 0 deletions

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+#+TITLE: Configuration for wireguard
+
+* Creating the keys
+We need a key for the host:
+#+begin_src sh
+(umask 0077; wg genkey > peer_A.key)
+#+end_src
+
+Next we create the public key:
+#+begin_src sh
+wg pubkey < peer_A.key > peer_A.pub
+#+end_src
+
+Now we need to add the private key to the list of secrets:
+#+begin_src sh
+nix run github:ryantm/agenix -- -e secrets/network/<host name>/wireguard_privatekey.age
+#+end_src
+
+Once this is done, update [[file:~/workspace/world/configs/wireguard.toml][wireguard.toml]] to add the new peer with the public key.
+
+Once this is completed, we can delete the files =peer_A.key= and =peer_A.pub=.