Function Hash

lib/internal/crypto/hash.js:95–119

(algorithm, options)

);

function Hash(algorithm, options) {
  if (!new.target)
    return new Hash(algorithm, options);
  const isCopy = algorithm instanceof _Hash;
  if (!isCopy)
    validateString(algorithm, 'algorithm');
  let xofLen = typeof options === 'object' && options !== null ?
    options.outputLength : undefined;
  if (xofLen !== undefined) {
    validateUint32(xofLen, 'options.outputLength');
    // Coerce -0 to +0.
    xofLen += 0;
  }
  // Lookup the cached ID from JS land because it's faster than decoding
  // the string in C++ land.
  const algorithmId = isCopy ? -1 : getCachedHashId(algorithm);
  this[kHandle] = new _Hash(algorithm, xofLen, algorithmId, getHashCache());
  this[kState] = {
    [kFinalized]: false,
  };
  if (!isCopy && xofLen === undefined) {
    maybeEmitDeprecationWarning(algorithm);
  }
  FunctionPrototypeCall(LazyTransform, this, options);
}

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