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d47147fb6a
This commit moves "deno_std/node" in "ext/node" crate. The code is transpiled and snapshotted during the build process. During the first pass a minimal amount of work was done to create the snapshot, a lot of code in "ext/node" depends on presence of "Deno" global. This code will be gradually fixed in the follow up PRs to migrate it to import relevant APIs from "internal:" modules. Currently the code from snapshot is not used in any way, and all Node/npm compatibility still uses code from "https://deno.land/std/node" (or from the location specified by "DENO_NODE_COMPAT_URL"). This will also be handled in a follow up PRs. --------- Co-authored-by: crowlkats <crowlkats@toaxl.com> Co-authored-by: Divy Srivastava <dj.srivastava23@gmail.com> Co-authored-by: Yoshiya Hinosawa <stibium121@gmail.com>
43 lines
1.2 KiB
TypeScript
43 lines
1.2 KiB
TypeScript
// Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.
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import { Buffer } from "internal:deno_node/polyfills/buffer.ts";
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function assert(cond) {
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if (!cond) {
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throw new Error("assertion failed");
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}
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}
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/** Compare to array buffers or data views in a way that timing based attacks
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* cannot gain information about the platform. */
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function stdTimingSafeEqual(
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a: ArrayBufferView | ArrayBufferLike | DataView,
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b: ArrayBufferView | ArrayBufferLike | DataView,
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): boolean {
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if (a.byteLength !== b.byteLength) {
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return false;
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}
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if (!(a instanceof DataView)) {
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a = new DataView(ArrayBuffer.isView(a) ? a.buffer : a);
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}
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if (!(b instanceof DataView)) {
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b = new DataView(ArrayBuffer.isView(b) ? b.buffer : b);
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}
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assert(a instanceof DataView);
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assert(b instanceof DataView);
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const length = a.byteLength;
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let out = 0;
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let i = -1;
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while (++i < length) {
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out |= a.getUint8(i) ^ b.getUint8(i);
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}
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return out === 0;
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}
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export const timingSafeEqual = (
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a: Buffer | DataView | ArrayBuffer,
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b: Buffer | DataView | ArrayBuffer,
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): boolean => {
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if (a instanceof Buffer) a = new DataView(a.buffer);
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if (a instanceof Buffer) b = new DataView(a.buffer);
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return stdTimingSafeEqual(a, b);
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};
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