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From c29172faf8b57450317f6d29ac9ff4c5dfe69d77 Mon Sep 17 00:00:00 2001
From: Sharlatan Hellseher <sharlatanus@gmail.com>
Date: Tue, 18 Aug 2026 19:26:53 +0100
Subject: [PATCH] chore: Use the browser-native Web Crypto API.
Use the browser-native Web Crypto API instead of @aws-crypto/sha256-js.
* lib/challenge/preact/js/app.jsx (useEffect): Switch to browser native hasher.
* web/js/worker/sha256-purejs.mjs (calculateSHA256): Likewise.
---
lib/challenge/preact/js/app.jsx | 7 +++----
web/js/worker/sha256-purejs.mjs | 10 ++++------
2 files changed, 7 insertions(+), 10 deletions(-)
diff --git a/lib/challenge/preact/js/app.jsx b/lib/challenge/preact/js/app.jsx
index f1321b8..96352b0 100644
--- a/lib/challenge/preact/js/app.jsx
+++ b/lib/challenge/preact/js/app.jsx
@@ -1,7 +1,6 @@
import { render, h, Fragment } from 'preact';
import { useState, useEffect } from 'preact/hooks';
import { g, j, u, x } from "./xeact.js";
-import { Sha256 } from '@aws-crypto/sha256-js';
/** @jsx h */
/** @jsxFrag Fragment */
@@ -24,9 +23,9 @@ const App = () => {
useEffect(() => {
setImageURL(state.pensive_url);
- const hash = new Sha256('');
- hash.update(state.challenge);
- setChallenge(toHexString(hash.digestSync()));
+ crypto.subtle
+ .digest("SHA-256", new TextEncoder().encode(state.challenge))
+ .then((buf) => setChallenge(toHexString(new Uint8Array(buf))));
}, [state]);
useEffect(() => {
diff --git a/web/js/worker/sha256-purejs.mjs b/web/js/worker/sha256-purejs.mjs
index 3211b44..08072c6 100644
--- a/web/js/worker/sha256-purejs.mjs
+++ b/web/js/worker/sha256-purejs.mjs
@@ -1,9 +1,7 @@
-import { Sha256 } from '@aws-crypto/sha256-js';
-
-const calculateSHA256 = (text) => {
- const hash = new Sha256();
- hash.update(text);
- return hash.digest();
+const calculateSHA256 = async (text) => {
+ return new Uint8Array(
+ await crypto.subtle.digest("SHA-256",
+ new TextEncoder().encode(text)));
};
function toHexString(arr) {
--
2.54.0
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