x64-core.js

(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;
        }
    });
}());