Improve cert retreival and new newt combined certs

server/routers/newt/sync.ts

@@ -6,7 +6,11 @@ import {
     buildClientConfigurationForNewtClient,
     buildTargetConfigurationForNewtClient
 } from "./buildConfiguration";
-import { canCompress } from "@server/lib/clientVersionChecks";
+import {
+    canCompress,
+    supportsCertReferences
+} from "@server/lib/clientVersionChecks";
+import { dedupeCertsForTargets } from "@server/lib/ip";
 
 export async function sendNewtSyncMessage(newt: Newt, site: Site) {
     const {
@@ -28,6 +32,16 @@ export async function sendNewtSyncMessage(newt: Newt, site: Site) {
         site,
         exitNode
     );
+
+    // Older newt clients only understand inline tlsCert/tlsKey on each
+    // target, so only switch to certId references once we know the client
+    // can resolve them.
+    let clientTargets = targets;
+    let certs: { id: string; cert: string; key: string }[] = [];
+    if (supportsCertReferences(newt.version)) {
+        ({ targets: clientTargets, certs } = dedupeCertsForTargets(targets));
+    }
+
     await sendToClient(
         newt.newtId,
         {
@@ -39,7 +53,8 @@ export async function sendNewtSyncMessage(newt: Newt, site: Site) {
                 },
                 healthCheckTargets: validHealthCheckTargets,
                 peers: peers,
-                clientTargets: targets,
+                clientTargets: clientTargets,
+                certs: certs,
                 browserGatewayTargets: browserGatewayTargets,
                 remoteExitNodeSubnets: remoteExitNodeSubnets
             }