1 files changed, 5 insertions, 4 deletions
diff --git a/lib/internal/crypto/hash.js b/lib/internal/crypto/hash.js
index f289d11cf8..713ded3d18 100644
--- a/lib/internal/crypto/hash.js
+++ b/lib/internal/crypto/hash.js
@@ -12,6 +12,10 @@ const {
   toBuf
 } = require('internal/crypto/util');
 
+const {
+  prepareSecretKey
+} = require('internal/crypto/keys');
+
 const { Buffer } = require('buffer');
 
 const {
@@ -88,10 +92,7 @@ function Hmac(hmac, key, options) {
   if (!(this instanceof Hmac))
     return new Hmac(hmac, key, options);
   validateString(hmac, 'hmac');
-  if (typeof key !== 'string' && !isArrayBufferView(key)) {
-    throw new ERR_INVALID_ARG_TYPE('key',
-                                   ['string', 'TypedArray', 'DataView'], key);
-  }
+  key = prepareSecretKey(key);
   this[kHandle] = new _Hmac();
   this[kHandle].init(hmac, toBuf(key));
   this[kState] = {