x64-core.js

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

(function(undefined) {
  // Shortcuts
  var C = CryptoJS;
  var C_lib = C.lib;
  var Base = C_lib.Base;
  var X32WordArray = C_lib.WordArray;

  /**
   * x64 namespace.
   */
  var C_x64 = C.x64 = {};

  /**
   * A 64-bit word.
   */
  var X64Word = C_x64.Word = Base.extend({
    /**
     * Initializes a newly created 64-bit word.
     *
     * @param {number} high The high 32 bits.
     * @param {number} low The low 32 bits.
     *
     * @example
     *
     *     var x64Word = CryptoJS.x64.Word.create(0x00010203, 0x04050607);
     */
    init: function(high, low) {
      this.high = high;
      this.low = low;
    }

    /**
     * Bitwise NOTs this word.
     *
     * @return {X64Word} A new x64-Word object after negating.
     *
     * @example
     *
     *     var negated = x64Word.not();
     */
    // not: function () {
    // var high = ~this.high;
    // var low = ~this.low;

    // return X64Word.create(high, low);
    // },

    /**
     * Bitwise ANDs this word with the passed word.
     *
     * @param {X64Word} word The x64-Word to AND with this word.
     *
     * @return {X64Word} A new x64-Word object after ANDing.
     *
     * @example
     *
     *     var anded = x64Word.and(anotherX64Word);
     */
    // and: function (word) {
    // var high = this.high & word.high;
    // var low = this.low & word.low;

    // return X64Word.create(high, low);
    // },

    /**
     * Bitwise ORs this word with the passed word.
     *
     * @param {X64Word} word The x64-Word to OR with this word.
     *
     * @return {X64Word} A new x64-Word object after ORing.
     *
     * @example
     *
     *     var ored = x64Word.or(anotherX64Word);
     */
    // or: function (word) {
    // var high = this.high | word.high;
    // var low = this.low | word.low;

    // return X64Word.create(high, low);
    // },

    /**
     * Bitwise XORs this word with the passed word.
     *
     * @param {X64Word} word The x64-Word to XOR with this word.
     *
     * @return {X64Word} A new x64-Word object after XORing.
     *
     * @example
     *
     *     var xored = x64Word.xor(anotherX64Word);
     */
    // xor: function (word) {
    // var high = this.high ^ word.high;
    // var low = this.low ^ word.low;

    // return X64Word.create(high, low);
    // },

    /**
     * Shifts this word n bits to the left.
     *
     * @param {number} n The number of bits to shift.
     *
     * @return {X64Word} A new x64-Word object after shifting.
     *
     * @example
     *
     *     var shifted = x64Word.shiftL(25);
     */
    // shiftL: function (n) {
    // if (n < 32) {
    // var high = (this.high << n) | (this.low >>> (32 - n));
    // var low = this.low << n;
    // } else {
    // var high = this.low << (n - 32);
    // var low = 0;
    // }

    // return X64Word.create(high, low);
    // },

    /**
     * Shifts this word n bits to the right.
     *
     * @param {number} n The number of bits to shift.
     *
     * @return {X64Word} A new x64-Word object after shifting.
     *
     * @example
     *
     *     var shifted = x64Word.shiftR(7);
     */
    // shiftR: function (n) {
    // if (n < 32) {
    // var low = (this.low >>> n) | (this.high << (32 - n));
    // var high = this.high >>> n;
    // } else {
    // var low = this.high >>> (n - 32);
    // var high = 0;
    // }

    // return X64Word.create(high, low);
    // },

    /**
     * Rotates this word n bits to the left.
     *
     * @param {number} n The number of bits to rotate.
     *
     * @return {X64Word} A new x64-Word object after rotating.
     *
     * @example
     *
     *     var rotated = x64Word.rotL(25);
     */
    // rotL: function (n) {
    // return this.shiftL(n).or(this.shiftR(64 - n));
    // },

    /**
     * Rotates this word n bits to the right.
     *
     * @param {number} n The number of bits to rotate.
     *
     * @return {X64Word} A new x64-Word object after rotating.
     *
     * @example
     *
     *     var rotated = x64Word.rotR(7);
     */
    // rotR: function (n) {
    // return this.shiftR(n).or(this.shiftL(64 - n));
    // },

    /**
     * Adds this word with the passed word.
     *
     * @param {X64Word} word The x64-Word to add with this word.
     *
     * @return {X64Word} A new x64-Word object after adding.
     *
     * @example
     *
     *     var added = x64Word.add(anotherX64Word);
     */
    // add: function (word) {
    // var low = (this.low + word.low) | 0;
    // var carry = (low >>> 0) < (this.low >>> 0) ? 1 : 0;
    // var high = (this.high + word.high + carry) | 0;

    // return X64Word.create(high, low);
    // }
  });

  /**
   * An array of 64-bit words.
   *
   * @property {Array} words The array of CryptoJS.x64.Word objects.
   * @property {number} sigBytes The number of significant bytes in this word array.
   */
  var X64WordArray = C_x64.WordArray = Base.extend({
    /**
     * Initializes a newly created word array.
     *
     * @param {Array} words (Optional) An array of CryptoJS.x64.Word objects.
     * @param {number} sigBytes (Optional) The number of significant bytes in the words.
     *
     * @example
     *
     *     var wordArray = CryptoJS.x64.WordArray.create();
     *
     *     var wordArray = CryptoJS.x64.WordArray.create([
     *         CryptoJS.x64.Word.create(0x00010203, 0x04050607),
     *         CryptoJS.x64.Word.create(0x18191a1b, 0x1c1d1e1f)
     *     ]);
     *
     *     var wordArray = CryptoJS.x64.WordArray.create([
     *         CryptoJS.x64.Word.create(0x00010203, 0x04050607),
     *         CryptoJS.x64.Word.create(0x18191a1b, 0x1c1d1e1f)
     *     ], 10);
     */
    init: function(words, sigBytes) {
      words = this.words = words || [];

      if (sigBytes != undefined) {
        this.sigBytes = sigBytes;
      } else {
        this.sigBytes = words.length * 8;
      }
    },

    /**
     * Converts this 64-bit word array to a 32-bit word array.
     *
     * @return {CryptoJS.lib.WordArray} This word array's data as a 32-bit word array.
     *
     * @example
     *
     *     var x32WordArray = x64WordArray.toX32();
     */
    toX32: function() {
      // Shortcuts
      var x64Words = this.words;
      var x64WordsLength = x64Words.length;

      // Convert
      var x32Words = [];
      for (var i = 0; i < x64WordsLength; i++) {
        var x64Word = x64Words[i];
        x32Words.push(x64Word.high);
        x32Words.push(x64Word.low);
      }

      return X32WordArray.create(x32Words, this.sigBytes);
    },

    /**
     * Creates a copy of this word array.
     *
     * @return {X64WordArray} The clone.
     *
     * @example
     *
     *     var clone = x64WordArray.clone();
     */
    clone: function() {
      var clone = Base.clone.call(this);

      // Clone "words" array
      var words = clone.words = this.words.slice(0);

      // Clone each X64Word object
      var wordsLength = words.length;
      for (var i = 0; i < wordsLength; i++) {
        words[i] = words[i].clone();
      }

      return clone;
    }
  });
}());

module.exports = CryptoJS;