Merge remote-tracking branch 'upstream/master'

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diff --git a/library/cryptojs/components/sha256.js b/library/cryptojs/components/sha256.js
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+/*
+CryptoJS v3.1.2
+code.google.com/p/crypto-js
+(c) 2009-2013 by Jeff Mott. All rights reserved.
+code.google.com/p/crypto-js/wiki/License
+*/
+(function (Math) {

+    // Shortcuts

+    var C = CryptoJS;

+    var C_lib = C.lib;

+    var WordArray = C_lib.WordArray;

+    var Hasher = C_lib.Hasher;

+    var C_algo = C.algo;

+

+    // Initialization and round constants tables

+    var H = [];

+    var K = [];

+

+    // Compute constants

+    (function () {

+        function isPrime(n) {

+            var sqrtN = Math.sqrt(n);

+            for (var factor = 2; factor <= sqrtN; factor++) {

+                if (!(n % factor)) {

+                    return false;

+                }

+            }

+

+            return true;

+        }

+

+        function getFractionalBits(n) {

+            return ((n - (n | 0)) * 0x100000000) | 0;

+        }

+

+        var n = 2;

+        var nPrime = 0;

+        while (nPrime < 64) {

+            if (isPrime(n)) {

+                if (nPrime < 8) {

+                    H[nPrime] = getFractionalBits(Math.pow(n, 1 / 2));

+                }

+                K[nPrime] = getFractionalBits(Math.pow(n, 1 / 3));

+

+                nPrime++;

+            }

+

+            n++;

+        }

+    }());

+

+    // Reusable object

+    var W = [];

+

+    /**

+     * SHA-256 hash algorithm.

+     */

+    var SHA256 = C_algo.SHA256 = Hasher.extend({

+        _doReset: function () {

+            this._hash = new WordArray.init(H.slice(0));

+        },

+

+        _doProcessBlock: function (M, offset) {

+            // Shortcut

+            var H = this._hash.words;

+

+            // Working variables

+            var a = H[0];

+            var b = H[1];

+            var c = H[2];

+            var d = H[3];

+            var e = H[4];

+            var f = H[5];

+            var g = H[6];

+            var h = H[7];

+

+            // Computation

+            for (var i = 0; i < 64; i++) {

+                if (i < 16) {

+                    W[i] = M[offset + i] | 0;

+                } else {

+                    var gamma0x = W[i - 15];

+                    var gamma0  = ((gamma0x << 25) | (gamma0x >>> 7))  ^

+                                  ((gamma0x << 14) | (gamma0x >>> 18)) ^

+                                   (gamma0x >>> 3);

+

+                    var gamma1x = W[i - 2];

+                    var gamma1  = ((gamma1x << 15) | (gamma1x >>> 17)) ^

+                                  ((gamma1x << 13) | (gamma1x >>> 19)) ^

+                                   (gamma1x >>> 10);

+

+                    W[i] = gamma0 + W[i - 7] + gamma1 + W[i - 16];

+                }

+

+                var ch  = (e & f) ^ (~e & g);

+                var maj = (a & b) ^ (a & c) ^ (b & c);

+

+                var sigma0 = ((a << 30) | (a >>> 2)) ^ ((a << 19) | (a >>> 13)) ^ ((a << 10) | (a >>> 22));

+                var sigma1 = ((e << 26) | (e >>> 6)) ^ ((e << 21) | (e >>> 11)) ^ ((e << 7)  | (e >>> 25));

+

+                var t1 = h + sigma1 + ch + K[i] + W[i];

+                var t2 = sigma0 + maj;

+

+                h = g;

+                g = f;

+                f = e;

+                e = (d + t1) | 0;

+                d = c;

+                c = b;

+                b = a;

+                a = (t1 + t2) | 0;

+            }

+

+            // Intermediate hash value

+            H[0] = (H[0] + a) | 0;

+            H[1] = (H[1] + b) | 0;

+            H[2] = (H[2] + c) | 0;

+            H[3] = (H[3] + d) | 0;

+            H[4] = (H[4] + e) | 0;

+            H[5] = (H[5] + f) | 0;

+            H[6] = (H[6] + g) | 0;

+            H[7] = (H[7] + h) | 0;

+        },

+

+        _doFinalize: function () {

+            // Shortcuts

+            var data = this._data;

+            var dataWords = data.words;

+

+            var nBitsTotal = this._nDataBytes * 8;

+            var nBitsLeft = data.sigBytes * 8;

+

+            // Add padding

+            dataWords[nBitsLeft >>> 5] |= 0x80 << (24 - nBitsLeft % 32);

+            dataWords[(((nBitsLeft + 64) >>> 9) << 4) + 14] = Math.floor(nBitsTotal / 0x100000000);

+            dataWords[(((nBitsLeft + 64) >>> 9) << 4) + 15] = nBitsTotal;

+            data.sigBytes = dataWords.length * 4;

+

+            // Hash final blocks

+            this._process();

+

+            // Return final computed hash

+            return this._hash;

+        },

+

+        clone: function () {

+            var clone = Hasher.clone.call(this);

+            clone._hash = this._hash.clone();

+

+            return clone;

+        }

+    });

+

+    /**

+     * 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.SHA256('message');

+     *     var hash = CryptoJS.SHA256(wordArray);

+     */

+    C.SHA256 = Hasher._createHelper(SHA256);

+

+    /**

+     * 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.HmacSHA256(message, key);

+     */

+    C.HmacSHA256 = Hasher._createHmacHelper(SHA256);

+}(Math));