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47 lines
1.4 KiB
Nix
47 lines
1.4 KiB
Nix
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{ outputs, lib, config, ... }:
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let
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inherit (config.networking) hostName;
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hosts = outputs.nixosConfigurations;
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pubKey = host: ../../${host}/ssh_host_ed25519_key.pub;
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gitHost = hosts."alcyone".config.networking.hostName;
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# Sops needs acess to the keys before the persist dirs are even mounted; so
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# just persisting the keys won't work, we must point at /persist
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hasOptinPersistence = config.environment.persistence ? "/persist";
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in
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{
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services.openssh = {
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enable = true;
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settings = {
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# Harden
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PasswordAuthentication = false;
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PermitRootLogin = "no";
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# Automatically remove stale sockets
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StreamLocalBindUnlink = "yes";
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# Allow forwarding ports to everywhere
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GatewayPorts = "clientspecified";
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};
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hostKeys = [{
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path = "${lib.optionalString hasOptinPersistence "/persist"}/etc/ssh/ssh_host_ed25519_key";
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type = "ed25519";
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}];
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};
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programs.ssh = {
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# Each hosts public key
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knownHosts = builtins.mapAttrs
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(name: _: {
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publicKeyFile = pubKey name;
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extraHostNames =
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(lib.optional (name == hostName) "localhost") ++ # Alias for localhost if it's the same host
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(lib.optionals (name == gitHost) [ "m7.rs" "git.m7.rs" ]); # Alias for m7.rs and git.m7.rs if it's the git host
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})
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hosts;
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};
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# Passwordless sudo when SSH'ing with keys
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security.pam.enableSSHAgentAuth = true;
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}
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