lib: extract validateString validator

Pulls out a common argument validator to `internal/validators`

PR-URL: https://github.com/nodejs/node/pull/22101
Reviewed-By: Joyee Cheung <joyeec9h3@gmail.com>
Reviewed-By: Michaël Zasso <targos@protonmail.com>
Reviewed-By: Trivikram Kamat <trivikr.dev@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Anatoli Papirovski <apapirovski@mac.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>

1 files changed, 3 insertions, 4 deletions

diff --git a/lib/internal/crypto/hash.js b/lib/internal/crypto/hash.js
index d172a6a3c8..7127d4d7ef 100644
--- a/lib/internal/crypto/hash.js
+++ b/lib/internal/crypto/hash.js
@@ -18,6 +18,7 @@ const {
   ERR_CRYPTO_HASH_UPDATE_FAILED,
   ERR_INVALID_ARG_TYPE
 } = require('internal/errors').codes;
+const { validateString } = require('internal/validators');
 const { inherits } = require('util');
 const { normalizeEncoding } = require('internal/util');
 const { isArrayBufferView } = require('internal/util/types');
@@ -28,8 +29,7 @@ const kFinalized = Symbol('finalized');
 function Hash(algorithm, options) {
   if (!(this instanceof Hash))
     return new Hash(algorithm, options);
-  if (typeof algorithm !== 'string')
-    throw new ERR_INVALID_ARG_TYPE('algorithm', 'string', algorithm);
+  validateString(algorithm, 'algorithm');
   this._handle = new _Hash(algorithm);
   this[kState] = {
     [kFinalized]: false
@@ -83,8 +83,7 @@ Hash.prototype.digest = function digest(outputEncoding) {
 function Hmac(hmac, key, options) {
   if (!(this instanceof Hmac))
     return new Hmac(hmac, key, options);
-  if (typeof hmac !== 'string')
-    throw new ERR_INVALID_ARG_TYPE('hmac', 'string', hmac);
+  validateString(hmac, 'hmac');
   if (typeof key !== 'string' && !isArrayBufferView(key)) {
     throw new ERR_INVALID_ARG_TYPE('key',
                                    ['string', 'TypedArray', 'DataView'], key);