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commit c8c04eb3777c0ed12ef37e65d0251b7d73d4079e
parent 99db9c884747bb7f00f245b13894741a2b9c67b4
Author: Vincent Demeester <vincent@sbr.pm>
Date:   Sat, 20 Nov 2021 01:18:41 +0100

users/vincent: refactor ssh config to use hosts.toml

Signed-off-by: Vincent Demeester <vincent@sbr.pm>

Diffstat:
M
users/vincent/core/ssh.nix
 | 
43
+++++++++++++++++++++++++++++++++++--------

1 file changed, 35 insertions(+), 8 deletions(-)
diff --git a/users/vincent/core/ssh.nix b/users/vincent/core/ssh.nix
@@ -1,16 +1,43 @@
 { config, lib, pkgs, ... }:
 
-with lib;
 let
-  patchedOpenSSH = pkgs.openssh.override { withKerberos = true; withGssapiPatches = true; };
-  secretPath = ../../../secrets/machines.nix;
-  secretCondition = (builtins.pathExists secretPath);
-  sshConfig = optionalAttrs secretCondition (import secretPath).sshConfig;
+  gpgRemoteForward = {
+    bind.address = "/run/user/1000/gnupg/S.gpg-agent";
+    host.address = "/run/user/1000/gnupg/S.gpg-agent.extra";
+  };
+  gpgSSHRemoteForward = {
+    bind.address = "/run/user/1000/gnupg/S.gpg-agent.ssh";
+    host.address = "/run/user/1000/gnupg/S.gpg-agent.ssh";
+  };
+
+  inherit (lib) optionalAttrs importTOML hasAttr attrsets mkIf;
+  metadata = importTOML ../../../ops/hosts.toml;
+
+  hasWireguard = name: value: hasAttr "wireguard" value;
+  hasAddrs = name: value: hasAttr "addrs" value;
+  hasSShAndRemoteForward = v: (hasAttr "ssh" v) && (hasAttr "gpgRemoteForward" v.ssh);
+
+  hostWireguardIP = v: "${v.wireguard.addrs.v4}";
+  hostIP = v: "${v.addrs.v4}";
+
+  hostToSSHConfigItem = value: ipfn: {
+    hostname = ipfn value;
+    remoteForwards = mkIf (hasSShAndRemoteForward value) [ gpgRemoteForward gpgSSHRemoteForward ];
+  };
+  hostToSSHConfig = suffix: ipfn:
+    name: value: attrsets.nameValuePair
+      (toString "${name}${suffix}")
+      (hostToSSHConfigItem value ipfn);
+
+  vpnConfig = attrsets.mapAttrs'
+    (hostToSSHConfig "\.vpn" hostWireguardIP)
+    (attrsets.filterAttrs hasWireguard metadata.hosts);
+  homeConfig = attrsets.mapAttrs'
+    (hostToSSHConfig "\.home" hostIP)
+    (attrsets.filterAttrs hasAddrs metadata.hosts);
 in
 {
   home.packages = [
-    # FIXME: doesn't seem to work on 20.09 for some reason :o)
-    # patchedOpenSSH
     pkgs.openssh
   ];
   home.file.".ssh/sockets/.placeholder".text = '''';
@@ -58,7 +85,7 @@ in
       "10.100.0.*" = {
         forwardAgent = true;
       };
-    } // sshConfig;
+    } // homeConfig // vpnConfig;
     extraConfig = ''
       PreferredAuthentications gssapi-with-mic,publickey,password
       GSSAPIAuthentication yes