Add helper for converting aaguid to UUID string

1 files changed, 18 insertions, 0 deletions

diff --git a/packages/server/src/helpers/convertAAGUIDToString.ts b/packages/server/src/helpers/convertAAGUIDToString.ts
new file mode 100644
index 0000000..36e251b
--- /dev/null
+++ b/packages/server/src/helpers/convertAAGUIDToString.ts
@@ -0,0 +1,18 @@
+/**
+ * Convert the aaguid buffer in authData into a UUID string
+ */
+export default function convertAAGUIDToString(aaguid: Buffer): string {
+  // Raw Hex: adce000235bcc60a648b0b25f1f05503
+  const hex = aaguid.toString('hex');
+
+  const segments: string[] = [
+    hex.slice(0, 8), // 8
+    hex.slice(8, 12), // 4
+    hex.slice(12, 16), // 4
+    hex.slice(16, 20), // 4
+    hex.slice(20, 32), // 8
+  ];
+
+  // Formatted: adce0002-35bc-c60a-648b-0b25f1f05503
+  return segments.join('-');
+}