From d47147fb6ad229b1c039aff9d0959b6e281f4df5 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Bartek=20Iwa=C5=84czuk?= Date: Tue, 14 Feb 2023 17:38:45 +0100 Subject: feat(ext/node): embed std/node into the snapshot (#17724) 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 Co-authored-by: Divy Srivastava Co-authored-by: Yoshiya Hinosawa --- .../_crypto/crypto_browserify/randombytes.ts | 47 ++++++++++++++++++++++ 1 file changed, 47 insertions(+) create mode 100644 ext/node/polyfills/_crypto/crypto_browserify/randombytes.ts (limited to 'ext/node/polyfills/_crypto/crypto_browserify/randombytes.ts') diff --git a/ext/node/polyfills/_crypto/crypto_browserify/randombytes.ts b/ext/node/polyfills/_crypto/crypto_browserify/randombytes.ts new file mode 100644 index 000000000..d70ada282 --- /dev/null +++ b/ext/node/polyfills/_crypto/crypto_browserify/randombytes.ts @@ -0,0 +1,47 @@ +// Copyright 2018-2023 the Deno authors. All rights reserved. MIT license. +// Copyright 2017 crypto-browserify. All rights reserved. MIT license. +import { Buffer } from "internal:deno_node/polyfills/buffer.ts"; +import { nextTick } from "internal:deno_node/polyfills/_next_tick.ts"; + +// limit of Crypto.getRandomValues() +// https://developer.mozilla.org/en-US/docs/Web/API/Crypto/getRandomValues +const MAX_BYTES = 65536; + +// Node supports requesting up to this number of bytes +// https://github.com/nodejs/node/blob/master/lib/internal/crypto/random.js#L48 +const MAX_UINT32 = 4294967295; + +export function randomBytes( + size: number, + cb?: (err: Error | null, b: Buffer) => void, +) { + // phantomjs needs to throw + if (size > MAX_UINT32) { + throw new RangeError("requested too many random bytes"); + } + + const bytes = Buffer.allocUnsafe(size); + + if (size > 0) { // getRandomValues fails on IE if size == 0 + if (size > MAX_BYTES) { // this is the max bytes crypto.getRandomValues + // can do at once see https://developer.mozilla.org/en-US/docs/Web/API/window.crypto.getRandomValues + for (let generated = 0; generated < size; generated += MAX_BYTES) { + // buffer.slice automatically checks if the end is past the end of + // the buffer so we don't have to here + globalThis.crypto.getRandomValues( + bytes.slice(generated, generated + MAX_BYTES), + ); + } + } else { + globalThis.crypto.getRandomValues(bytes); + } + } + + if (typeof cb === "function") { + return nextTick(function () { + cb(null, bytes); + }); + } + + return bytes; +} -- cgit v1.2.3