1 files changed, 129 insertions, 0 deletions
diff --git a/ext/node/polyfills/internal/crypto/util.ts b/ext/node/polyfills/internal/crypto/util.ts
new file mode 100644
index 000000000..f9fce8b2d
--- /dev/null
+++ b/ext/node/polyfills/internal/crypto/util.ts
@@ -0,0 +1,129 @@
+// Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.
+// Copyright Joyent, Inc. and Node.js contributors. All rights reserved. MIT license.
+
+import { getCiphers } from "internal:deno_node/polyfills/_crypto/crypto_browserify/browserify_aes/mod.js";
+import { notImplemented } from "internal:deno_node/polyfills/_utils.ts";
+import { Buffer } from "internal:deno_node/polyfills/buffer.ts";
+import {
+  ERR_INVALID_ARG_TYPE,
+  hideStackFrames,
+} from "internal:deno_node/polyfills/internal/errors.ts";
+import {
+  isAnyArrayBuffer,
+  isArrayBufferView,
+} from "internal:deno_node/polyfills/internal/util/types.ts";
+import { crypto as constants } from "internal:deno_node/polyfills/internal_binding/constants.ts";
+import {
+  kHandle,
+  kKeyObject,
+} from "internal:deno_node/polyfills/internal/crypto/constants.ts";
+
+// TODO(kt3k): Generate this list from `digestAlgorithms`
+// of std/crypto/_wasm/mod.ts
+const digestAlgorithms = [
+  "blake2b256",
+  "blake2b384",
+  "blake2b",
+  "blake2s",
+  "blake3",
+  "keccak-224",
+  "keccak-256",
+  "keccak-384",
+  "keccak-512",
+  "sha384",
+  "sha3-224",
+  "sha3-256",
+  "sha3-384",
+  "sha3-512",
+  "shake128",
+  "shake256",
+  "tiger",
+  "rmd160",
+  "sha224",
+  "sha256",
+  "sha512",
+  "md4",
+  "md5",
+  "sha1",
+];
+
+let defaultEncoding = "buffer";
+
+export function setDefaultEncoding(val: string) {
+  defaultEncoding = val;
+}
+
+export function getDefaultEncoding(): string {
+  return defaultEncoding;
+}
+
+// This is here because many functions accepted binary strings without
+// any explicit encoding in older versions of node, and we don't want
+// to break them unnecessarily.
+export function toBuf(val: string | Buffer, encoding?: string): Buffer {
+  if (typeof val === "string") {
+    if (encoding === "buffer") {
+      encoding = "utf8";
+    }
+
+    return Buffer.from(val, encoding);
+  }
+
+  return val;
+}
+
+export const validateByteSource = hideStackFrames((val, name) => {
+  val = toBuf(val);
+
+  if (isAnyArrayBuffer(val) || isArrayBufferView(val)) {
+    return;
+  }
+
+  throw new ERR_INVALID_ARG_TYPE(
+    name,
+    ["string", "ArrayBuffer", "TypedArray", "DataView", "Buffer"],
+    val,
+  );
+});
+
+/**
+ * Returns an array of the names of the supported hash algorithms, such as 'sha1'.
+ */
+export function getHashes(): readonly string[] {
+  return digestAlgorithms;
+}
+
+export function getCurves(): readonly string[] {
+  notImplemented("crypto.getCurves");
+}
+
+export interface SecureHeapUsage {
+  total: number;
+  min: number;
+  used: number;
+  utilization: number;
+}
+
+export function secureHeapUsed(): SecureHeapUsage {
+  notImplemented("crypto.secureHeapUsed");
+}
+
+export function setEngine(_engine: string, _flags: typeof constants) {
+  notImplemented("crypto.setEngine");
+}
+
+export { getCiphers, kHandle, kKeyObject };
+
+export default {
+  getDefaultEncoding,
+  getHashes,
+  setDefaultEncoding,
+  getCiphers,
+  getCurves,
+  secureHeapUsed,
+  setEngine,
+  validateByteSource,
+  toBuf,
+  kHandle,
+  kKeyObject,
+};