amazon-cognito-identity-js/es/utils/WordArray.js

Amazon Cognito Identity Provider JavaScript SDK

import cryptoSecureRandomInt from './cryptoSecureRandomInt';

/**
 * Hex encoding strategy.
 * Converts a word array to a hex string.
 * @param {WordArray} wordArray The word array.
 * @return {string} The hex string.
 * @static
 */
function hexStringify(wordArray) {
  // Shortcuts
  var words = wordArray.words;
  var sigBytes = wordArray.sigBytes;

  // Convert
  var hexChars = [];
  for (var i = 0; i < sigBytes; i++) {
    var bite = words[i >>> 2] >>> 24 - i % 4 * 8 & 0xff;
    hexChars.push((bite >>> 4).toString(16));
    hexChars.push((bite & 0x0f).toString(16));
  }
  return hexChars.join('');
}
var WordArray = /*#__PURE__*/function () {
  function WordArray(words, sigBytes) {
    words = this.words = words || [];
    if (sigBytes != undefined) {
      this.sigBytes = sigBytes;
    } else {
      this.sigBytes = words.length * 4;
    }
  }
  var _proto = WordArray.prototype;
  _proto.random = function random(nBytes) {
    var words = [];
    for (var i = 0; i < nBytes; i += 4) {
      words.push(cryptoSecureRandomInt());
    }
    return new WordArray(words, nBytes);
  };
  _proto.toString = function toString() {
    return hexStringify(this);
  };
  return WordArray;
}();
export { WordArray as default };