From 08eab03943f4f698589d2821a7538f2c6e26b2e1 Mon Sep 17 00:00:00 2001
From: Ardis Lu <ardisglu@gmail.com>
Date: Fri, 27 Mar 2026 23:21:12 -0700
Subject: [PATCH] Use `Uint8Array.toBase64()` instead of `btoa`

---
 index.html | 2 +-
 script.js  | 9 ++-------
 2 files changed, 3 insertions(+), 8 deletions(-)

diff --git a/index.html b/index.html
index bdc0f33..b6c3b4b 100644
--- a/index.html
+++ b/index.html
@@ -12,7 +12,7 @@
   <link rel="canonical" href="https://108117.xyz/">
   <link rel="icon" href="data:,">
   <link rel="stylesheet" href="./style.css">
-  <link rel="modulepreload" href="./script.js" integrity="sha512-ljYjSBnb58ufLJgdl8cOXJT6xnVRlzdCQWwGG2AKTZTViiH+0tHxU4k1cDsqjw/cQIvxmoIBl6WSR1bOeG+uFQ==">
+  <link rel="modulepreload" href="./script.js" integrity="sha512-Lkb5w3ts0GdkX4MFDhtyGZFN8o4PtN1u+jq0tX4XqCCN/sV+ddnsro9zNQ12vt6fSBS6NJUPUCxwqiIpNgSAMA==">
   <title>static-encrypt-passkey</title>
 </head>
 
diff --git a/script.js b/script.js
index a0ad452..093f5d6 100644
--- a/script.js
+++ b/script.js
@@ -105,13 +105,8 @@ export async function encrypt(plaintext) {
   buffer.set(salt);
   buffer.set(iv, salt.byteLength);
   buffer.set(ciphertext, salt.byteLength + iv.byteLength);
-  let binary = '';
-  for (let i = 0; i < buffer.byteLength; i++) {
-    binary += String.fromCharCode(buffer[i]);
-  }
-  const content = btoa(binary);
 
-  return content;
+  return buffer.toBase64();
 }
 
 /**
@@ -123,7 +118,7 @@ export async function encrypt(plaintext) {
  */
 export async function decrypt(content) {
   // Extract random values
-  const buffer = Uint8Array.from(atob(content), c => c.charCodeAt(0));
+  const buffer = Uint8Array.fromBase64(content);
   const salt = buffer.slice(0, 64); // For HKDF
   const iv = buffer.slice(64, 76); // For AES-GCM
   const ciphertext = buffer.slice(76);
-- 
2.47.3