@netlify/plugin-nextjs
Version:
Run Next.js seamlessly on Netlify
30 lines (27 loc) • 875 B
text/typescript
// Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.
import { assert } from "../_util/asserts.ts";
/** Compare to array buffers or data views in a way that timing based attacks
* cannot gain information about the platform. */
export function timingSafeEqual(
a: ArrayBufferView | ArrayBufferLike | DataView,
b: ArrayBufferView | ArrayBufferLike | DataView,
): boolean {
if (a.byteLength !== b.byteLength) {
return false;
}
if (!(a instanceof DataView)) {
a = new DataView(ArrayBuffer.isView(a) ? a.buffer : a);
}
if (!(b instanceof DataView)) {
b = new DataView(ArrayBuffer.isView(b) ? b.buffer : b);
}
assert(a instanceof DataView);
assert(b instanceof DataView);
const length = a.byteLength;
let out = 0;
let i = -1;
while (++i < length) {
out |= a.getUint8(i) ^ b.getUint8(i);
}
return out === 0;
}