sha224.js

var CryptoJS = require('./core');
require('./sha256');

(function() {
  // Shortcuts
  var C = CryptoJS;
  var C_lib = C.lib;
  var WordArray = C_lib.WordArray;
  var C_algo = C.algo;
  var SHA256 = C_algo.SHA256;

  /**
   * SHA-224 hash algorithm.
   */
  var SHA224 = C_algo.SHA224 = SHA256.extend({
    _doReset: function() {
      this._hash = new WordArray.init([
        0xc1059ed8, 0x367cd507, 0x3070dd17, 0xf70e5939,
        0xffc00b31, 0x68581511, 0x64f98fa7, 0xbefa4fa4
      ]);
    },

    _doFinalize: function() {
      var hash = SHA256._doFinalize.call(this);

      hash.sigBytes -= 4;

      return hash;
    }
  });

  /**
   * Shortcut function to the hasher's object interface.
   *
   * @param {WordArray|string} message The message to hash.
   *
   * @return {WordArray} The hash.
   *
   * @static
   *
   * @example
   *
   *     var hash = CryptoJS.SHA224('message');
   *     var hash = CryptoJS.SHA224(wordArray);
   */
  C.SHA224 = SHA256._createHelper(SHA224);

  /**
   * Shortcut function to the HMAC's object interface.
   *
   * @param {WordArray|string} message The message to hash.
   * @param {WordArray|string} key The secret key.
   *
   * @return {WordArray} The HMAC.
   *
   * @static
   *
   * @example
   *
   *     var hmac = CryptoJS.HmacSHA224(message, key);
   */
  C.HmacSHA224 = SHA256._createHmacHelper(SHA224);
}());

module.exports = CryptoJS.SHA224;