From 0fb7dd4dffa9c64ccd02f605e7d7d583fa1857d3 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Tobias=20Nie=C3=9Fen?= <tniessen@tnie.de>
Date: Sun, 6 Mar 2022 12:25:37 +0000
Subject: [PATCH] crypto: add crypto.hash

Refs: https://github.com/nodejs/node/issues/26748
---
 benchmark/crypto/oneshot-hash.js | 33 ++++++++++++++++++++++++++++++++
 lib/crypto.js                    |  4 +++-
 lib/internal/crypto/hash.js      | 19 ++++++++++++++++++
 3 files changed, 55 insertions(+), 1 deletion(-)
 create mode 100644 benchmark/crypto/oneshot-hash.js

diff --git a/benchmark/crypto/oneshot-hash.js b/benchmark/crypto/oneshot-hash.js
new file mode 100644
index 00000000000000..695857e50bf9cf
--- /dev/null
+++ b/benchmark/crypto/oneshot-hash.js
@@ -0,0 +1,33 @@
+'use strict';
+const common = require('../common.js');
+const { hash, createHash } = require('crypto');
+
+const bench = common.createBenchmark(main, {
+  mode: ['oneshot', 'stateful'],
+  algo: ['sha1', 'sha256', 'sha512'],
+  len: [2, 128, 1024, 64 * 1024],
+  n: [1e5],
+});
+
+function testOneshot(algo, data, n) {
+  bench.start();
+  for (let i = 0; i < n; i++)
+    hash(algo, data);
+  bench.end(n);
+}
+
+function testStateful(algo, data, n) {
+  bench.start();
+  for (let i = 0; i < n; i++)
+    createHash(algo).update(data).digest();
+  bench.end(n);
+}
+
+function main({ mode, algo, len, n }) {
+  const data = Buffer.alloc(len);
+  if (mode === 'oneshot') {
+    testOneshot(algo, data, n);
+  } else {
+    testStateful(algo, data, n);
+  }
+}
diff --git a/lib/crypto.js b/lib/crypto.js
index a839f5fe27b029..eb4d80a9798864 100644
--- a/lib/crypto.js
+++ b/lib/crypto.js
@@ -107,7 +107,8 @@ const {
 } = require('internal/crypto/sig');
 const {
   Hash,
-  Hmac
+  Hmac,
+  hash
 } = require('internal/crypto/hash');
 const {
   X509Certificate
@@ -199,6 +200,7 @@ module.exports = {
   getCurves,
   getDiffieHellman: createDiffieHellmanGroup,
   getHashes,
+  hash,
   hkdf,
   hkdfSync,
   pbkdf2,
diff --git a/lib/internal/crypto/hash.js b/lib/internal/crypto/hash.js
index 6c502f52b66503..cb9b76514b6f68 100644
--- a/lib/internal/crypto/hash.js
+++ b/lib/internal/crypto/hash.js
@@ -11,6 +11,7 @@ const {
   HashJob,
   Hmac: _Hmac,
   kCryptoJobAsync,
+  kCryptoJobSync,
 } = internalBinding('crypto');
 
 const {
@@ -161,6 +162,23 @@ Hmac.prototype.digest = function digest(outputEncoding) {
 Hmac.prototype._flush = Hash.prototype._flush;
 Hmac.prototype._transform = Hash.prototype._transform;
 
+function hash(algorithm, data, options) {
+  validateString(algorithm, 'algorithm');
+  if (!isArrayBufferView(data)) {
+    throw new ERR_INVALID_ARG_TYPE(
+      'data', ['Buffer', 'TypedArray', 'DataView'], data);
+  }
+  const xofLen = typeof options === 'object' && options !== null ?
+    options.outputLength : undefined;
+  if (xofLen !== undefined)
+    validateUint32(xofLen, 'options.outputLength');
+  const { 0: err, 1: digest } =
+      new HashJob(kCryptoJobSync, algorithm, data, xofLen).run();
+  if (err !== undefined)
+    throw err;
+  return digest;
+}
+
 // Implementation for WebCrypto subtle.digest()
 
 async function asyncDigest(algorithm, data) {
@@ -181,5 +199,6 @@ async function asyncDigest(algorithm, data) {
 module.exports = {
   Hash,
   Hmac,
+  hash,
   asyncDigest,
 };