crypto: fix webcrypto generateKey() with empty usages

PR-URL: #43431 Reviewed-By: Tobias Nießen <tniessen@tnie.de> Reviewed-By: James M Snell <jasnell@gmail.com> Reviewed-By: Antoine du Hamel <duhamelantoine1995@gmail.com>

Author: panva

lib/internal/crypto/webcrypto.js

@@ -89,6 +89,11 @@ async function generateKey(
  algorithm = normalizeAlgorithm(algorithm);
  validateBoolean(extractable, 'extractable');
  validateArray(keyUsages, 'keyUsages');
+ if (keyUsages.length === 0) {
+ throw lazyDOMException(
+ 'Usages cannot be empty when creating a key',
+ 'SyntaxError');
+ }
  switch (algorithm.name) {
  case 'RSASSA-PKCS1-v1_5':
  // Fall through

test/parallel/test-webcrypto-keygen.js

@@ -210,6 +210,15 @@ const vectors = {
 // Test bad usages
 {
  async function test(name) {
+ await assert.rejects(
+ subtle.generateKey(
+ {
+ name, ...vectors[name].algorithm
+ },
+ true,
+ []),
+ { message: /Usages cannot be empty/ });
+
  const invalidUsages = [];
  allUsages.forEach((usage) => {
  if (!vectors[name].usages.includes(usage))

test/parallel/test-webcrypto-sign-verify-hmac.js

@@ -153,7 +153,7 @@ async function testSign({ hash,
  }
 
  await assert.rejects(
- subtle.generateKey({ name }, false, []), {
+ subtle.generateKey({ name }, false, ['sign', 'verify']), {
  name: 'TypeError',
  code: 'ERR_MISSING_OPTION',
  message: 'algorithm.hash is required'