From de391556059b273e9f4239e95acb64f9a56f990f Mon Sep 17 00:00:00 2001
From: Koushik Dutta <koushd@gmail.com>
Date: Mon, 17 Jan 2022 20:57:45 -0800
Subject: [PATCH] zwave: network key base64 to hex data migration

---
 plugins/zwave/src/hex.ts  | 25 +++++++++++++++++++++++++
 plugins/zwave/src/main.ts | 10 +++++++++-
 2 files changed, 34 insertions(+), 1 deletion(-)
 create mode 100644 plugins/zwave/src/hex.ts

diff --git a/plugins/zwave/src/hex.ts b/plugins/zwave/src/hex.ts
new file mode 100644
index 000000000..218302e75
--- /dev/null
+++ b/plugins/zwave/src/hex.ts
@@ -0,0 +1,25 @@
+export function isHex(s: string) {
+    for (const c of s) {
+        switch (c.toLowerCase()) {
+            case '0':
+            case '1':
+            case '2':
+            case '3':
+            case '4':
+            case '5':
+            case '6':
+            case '7':
+            case '8':
+            case '9':
+            case 'a':
+            case 'b':
+            case 'c':
+            case 'd':
+            case 'e':
+            case 'f':
+                break;
+            default: return false;
+        }
+    }
+    return true;
+}
diff --git a/plugins/zwave/src/main.ts b/plugins/zwave/src/main.ts
index 65657587a..8a1347158 100644
--- a/plugins/zwave/src/main.ts
+++ b/plugins/zwave/src/main.ts
@@ -8,6 +8,7 @@ import { Driver, Endpoint, ZWaveController, ZWaveNode, CommandClass } from "zwav
 import { ValueID, CommandClasses } from "@zwave-js/core"
 import { randomBytes } from "crypto";
 import path from "path";
+import { isHex } from "./hex";
 
 const { log, deviceManager } = sdk;
 
@@ -53,7 +54,14 @@ export class ZwaveControllerProvider extends ScryptedDeviceBase implements Devic
         let s2AccessControlKey = this.storage.getItem('s2AccessControlKey');
         let s2AuthenticatedKey = this.storage.getItem('s2AuthenticatedKey');
         let s2UnauthenticatedKey = this.storage.getItem('s2UnauthenticatedKey');
-        
+
+        // 1/17/2022: the network key was stored as base64, but for consistency with HA
+        // and others, it was switched to hex. this is the data migration.
+        if (!isHex(networkKey)) {
+            networkKey = Buffer.from(networkKey, 'base64').toString('hex');
+            this.storage.setItem('networkKey', networkKey);
+        }
+
         if (!networkKey) {
             networkKey = randomBytes(16).toString('hex').toUpperCase();
             this.storage.setItem('networkKey', networkKey);