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 <crowlkats@toaxl.com>
Co-authored-by: Divy Srivastava <dj.srivastava23@gmail.com>
Co-authored-by: Yoshiya Hinosawa <stibium121@gmail.com>

1 files changed, 84 insertions, 0 deletions

diff --git a/ext/node/polyfills/internal/crypto/_randomFill.ts b/ext/node/polyfills/internal/crypto/_randomFill.ts
new file mode 100644
index 000000000..045072696
--- /dev/null
+++ b/ext/node/polyfills/internal/crypto/_randomFill.ts
@@ -0,0 +1,84 @@
+// Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.
+import randomBytes, {
+  MAX_SIZE as kMaxUint32,
+} from "internal:deno_node/polyfills/internal/crypto/_randomBytes.ts";
+import { Buffer } from "internal:deno_node/polyfills/buffer.ts";
+
+const kBufferMaxLength = 0x7fffffff;
+
+function assertOffset(offset: number, length: number) {
+  if (offset > kMaxUint32 || offset < 0) {
+    throw new TypeError("offset must be a uint32");
+  }
+
+  if (offset > kBufferMaxLength || offset > length) {
+    throw new RangeError("offset out of range");
+  }
+}
+
+function assertSize(size: number, offset: number, length: number) {
+  if (size > kMaxUint32 || size < 0) {
+    throw new TypeError("size must be a uint32");
+  }
+
+  if (size + offset > length || size > kBufferMaxLength) {
+    throw new RangeError("buffer too small");
+  }
+}
+
+export default function randomFill(
+  buf: Buffer,
+  cb: (err: Error | null, buf: Buffer) => void,
+): void;
+
+export default function randomFill(
+  buf: Buffer,
+  offset: number,
+  cb: (err: Error | null, buf: Buffer) => void,
+): void;
+
+export default function randomFill(
+  buf: Buffer,
+  offset: number,
+  size: number,
+  cb: (err: Error | null, buf: Buffer) => void,
+): void;
+
+export default function randomFill(
+  buf: Buffer,
+  offset?: number | ((err: Error | null, buf: Buffer) => void),
+  size?: number | ((err: Error | null, buf: Buffer) => void),
+  cb?: (err: Error | null, buf: Buffer) => void,
+) {
+  if (typeof offset === "function") {
+    cb = offset;
+    offset = 0;
+    size = buf.length;
+  } else if (typeof size === "function") {
+    cb = size;
+    size = buf.length - Number(offset as number);
+  }
+
+  assertOffset(offset as number, buf.length);
+  assertSize(size as number, offset as number, buf.length);
+
+  randomBytes(size as number, (err, bytes) => {
+    if (err) return cb!(err, buf);
+    bytes?.copy(buf, offset as number);
+    cb!(null, buf);
+  });
+}
+
+export function randomFillSync(buf: Buffer, offset = 0, size?: number) {
+  assertOffset(offset, buf.length);
+
+  if (size === undefined) size = buf.length - offset;
+
+  assertSize(size, offset, buf.length);
+
+  const bytes = randomBytes(size);
+
+  bytes.copy(buf, offset);
+
+  return buf;
+}