Function Hmac

lib/internal/crypto/hash.js:172–184

(hmac, key, options)

};

function Hmac(hmac, key, options) {
  if (!(this instanceof Hmac))
    return new Hmac(hmac, key, options);
  validateString(hmac, 'hmac');
  const encoding = getStringOption(options, 'encoding');
  key = prepareSecretKey(key, encoding);
  this[kHandle] = new _Hmac();
  this[kHandle].init(hmac, key);
  this[kState] = {
    [kFinalized]: false,
  };
  FunctionPrototypeCall(LazyTransform, this, options);
}

ObjectSetPrototypeOf(Hmac.prototype, LazyTransform.prototype);
ObjectSetPrototypeOf(Hmac, LazyTransform);