added ssh-bootstrap

modules/core/ssh-bootstrap.nix

@@ -0,0 +1,54 @@
+{ config, pkgs, lib, ... }:
+
+let
+  userName = "free";
+  keyPath = "/home/${userName}/.ssh/factory_login";
+in
+{
+  # Ensure SSH dirs exist with correct perms
+  systemd.tmpfiles.rules = [
+    "d /root/.ssh 0700 root root -"
+    "d /home/${userName}/.ssh 0700 ${userName} users -"
+  ];
+
+  # Generate keypair if missing (runs once)
+  systemd.services.factory-ssh-keygen = {
+    description = "Generate factory SSH key for ${userName} if missing";
+    wantedBy = [ "multi-user.target" ];
+    serviceConfig = {
+      Type = "oneshot";
+      RemainAfterExit = true;
+    };
+    path = [ pkgs.openssh pkgs.coreutils ];
+    script = ''
+      if [ ! -f "${keyPath}" ]; then
+        ssh-keygen -q -N "gosovransystems" -t ed25519 -f "${keyPath}"
+        chown ${userName}:users "${keyPath}" "${keyPath}.pub"
+        chmod 600 "${keyPath}"
+        chmod 644 "${keyPath}.pub"
+      fi
+    '';
+  };
+
+  # Pull the public key into root's authorized_keys once it exists
+  systemd.services.factory-ssh-authorize = {
+    description = "Authorize factory SSH key for root";
+    wantedBy = [ "multi-user.target" ];
+    after = [ "factory-ssh-keygen.service" ];
+    requires = [ "factory-ssh-keygen.service" ];
+    serviceConfig = {
+      Type = "oneshot";
+      RemainAfterExit = true;
+    };
+    path = [ pkgs.coreutils ];
+    script = ''
+      if [ -f "${keyPath}.pub" ]; then
+        PUB=$(cat "${keyPath}.pub")
+        mkdir -p /root/.ssh
+        touch /root/.ssh/authorized_keys
+        grep -qxF "$PUB" /root/.ssh/authorized_keys || echo "$PUB" >> /root/.ssh/authorized_keys
+        chmod 600 /root/.ssh/authorized_keys
+      fi
+    '';
+  };
+}