moved step-ca defaults file for mtls

modules/services/step-ca/mtls.nix

@@ -3,9 +3,13 @@ let
   # Options that will be in common between
   opts = {
     enable = lib.mkEnableOption "Enable mTLS";
-    caURL = lib.mkOption {
-      description = "URL to the certificate authority";
-      type = lib.types.str;
+    ca = {
+      url = lib.mkOption {
+        type = lib.types.str;
+      };
+      fingerprint = lib.mkOption {
+        type = lib.types.str;
+      };
     };
     subject = lib.mkOption {
       description = "The Common Name, DNS Name, or IP address that will be set as the Subject Common Name for the certificate. If no Subject Alternative Names (SANs) are configured (via the --san flag) then the subject will be set as the only SAN.";
@@ -228,8 +232,6 @@ in
             set -euo pipefail
             ${lib.getExe pkgs.step-cli} ca certificate \
               ${cfg.subject} ${tlsCert} ${tlsKey} \
-              --ca-url ${cfg.caURL} \
-              --root ${rootCA} \
               --provisioner ${cfg.provisioner} \
               --not-before=-5m --not-after=${cfg.lifetime} \
               ${sanArgs} \
@@ -275,6 +277,12 @@ in
       };
 
       config = {
+        home.file.".step/config/defaults.json".text = builtins.toJSON {
+          "ca-url" = cfg.ca.url;
+          fingerprint = cfg.ca.fingerprint;
+          root = "${cfg.certDir}/root_ca.crt";
+        };
+
         home.packages = with pkgs; lib.optionals cfg.enable [
           step-cli
           (writeShellScriptBin "mtls-generate" ''