From b61032ed4a20f846d93384a95425572d3cb1c791 Mon Sep 17 00:00:00 2001
From: Evan Feenstra <evanfeenstra@gmail.com>
Date: Mon, 16 Oct 2023 15:35:48 -0700
Subject: [PATCH] add signer id

---
 vls-mqtt/app/src/signerUtils.ts | 11 ++++++++++-
 vls-mqtt/app/src/store.ts       | 11 +++++++++++
 2 files changed, 21 insertions(+), 1 deletion(-)

diff --git a/vls-mqtt/app/src/signerUtils.ts b/vls-mqtt/app/src/signerUtils.ts
index 9a6f68d..b89fdc5 100644
--- a/vls-mqtt/app/src/signerUtils.ts
+++ b/vls-mqtt/app/src/signerUtils.ts
@@ -1,6 +1,13 @@
 import * as localforage from "localforage";
 import * as msgpack from "@msgpack/msgpack";
-import { type Policy, seed, lss_nonce, policy, allowlist } from "./store";
+import {
+  type Policy,
+  seed,
+  lss_nonce,
+  signer_id,
+  policy,
+  allowlist,
+} from "./store";
 import { get } from "svelte/store";
 
 // store state mutations in IndexedDB
@@ -19,6 +26,7 @@ export interface Args {
   allowlist: string[];
   timestamp: number; // unix ts in seconds
   lss_nonce: Uint8Array;
+  signer_id: Uint8Array;
 }
 
 export enum Topics {
@@ -87,6 +95,7 @@ function makeArgs(): Args {
     allowlist: get(allowlist),
     timestamp: now(),
     lss_nonce: fromHexString(get(lss_nonce)),
+    signer_id: fromHexString(get(signer_id)),
   };
 }
 
diff --git a/vls-mqtt/app/src/store.ts b/vls-mqtt/app/src/store.ts
index 3a83843..b6de76a 100644
--- a/vls-mqtt/app/src/store.ts
+++ b/vls-mqtt/app/src/store.ts
@@ -62,6 +62,15 @@ export const gen32Nonce = (): string => {
   ).join("");
 };
 
+export const gen16Id = (): string => {
+  return Array.from(
+    window.crypto.getRandomValues(new Uint8Array(16)),
+    (byte) => {
+      return ("0" + (byte & 0xff).toString(16)).slice(-2);
+    }
+  ).join("");
+};
+
 export const entropy = localStorageStore<string>("entropy", genEntropy());
 
 export const seed = derived([loaded, entropy], ([$loaded, $entropy]) => {
@@ -75,6 +84,8 @@ export const seed = derived([loaded, entropy], ([$loaded, $entropy]) => {
 
 export const lss_nonce = writable<string>(gen32Nonce());
 
+export const signer_id = writable<string>(gen16Id());
+
 export const keys = derived([loaded, seed], ([$loaded, $seed]) => {
   if (!$loaded) return null;
   if (!$seed) return null;