;(function (root, factory) {
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if (typeof exports === "object") {
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// CommonJS
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module.exports = exports = factory(require("./core"));
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}
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else if (typeof define === "function" && define.amd) {
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// AMD
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define(["./core"], factory);
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}
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else {
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// Global (browser)
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factory(root.CryptoJS);
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}
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}(this, function (CryptoJS) {
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(function (Math) {
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// Shortcuts
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var C = CryptoJS;
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var C_lib = C.lib;
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var WordArray = C_lib.WordArray;
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var Hasher = C_lib.Hasher;
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var C_algo = C.algo;
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// Initialization and round constants tables
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var H = [];
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var K = [];
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// Compute constants
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(function () {
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function isPrime(n) {
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var sqrtN = Math.sqrt(n);
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for (var factor = 2; factor <= sqrtN; factor++) {
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if (!(n % factor)) {
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return false;
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}
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}
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return true;
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}
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function getFractionalBits(n) {
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return ((n - (n | 0)) * 0x100000000) | 0;
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}
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var n = 2;
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var nPrime = 0;
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while (nPrime < 64) {
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if (isPrime(n)) {
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if (nPrime < 8) {
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H[nPrime] = getFractionalBits(Math.pow(n, 1 / 2));
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}
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K[nPrime] = getFractionalBits(Math.pow(n, 1 / 3));
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nPrime++;
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}
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n++;
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}
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}());
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// Reusable object
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var W = [];
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/**
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* SHA-256 hash algorithm.
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*/
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var SHA256 = C_algo.SHA256 = Hasher.extend({
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_doReset: function () {
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this._hash = new WordArray.init(H.slice(0));
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},
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_doProcessBlock: function (M, offset) {
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// Shortcut
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var H = this._hash.words;
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// Working variables
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var a = H[0];
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var b = H[1];
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var c = H[2];
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var d = H[3];
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var e = H[4];
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var f = H[5];
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var g = H[6];
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var h = H[7];
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// Computation
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for (var i = 0; i < 64; i++) {
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if (i < 16) {
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W[i] = M[offset + i] | 0;
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} else {
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var gamma0x = W[i - 15];
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var gamma0 = ((gamma0x << 25) | (gamma0x >>> 7)) ^
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((gamma0x << 14) | (gamma0x >>> 18)) ^
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(gamma0x >>> 3);
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var gamma1x = W[i - 2];
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var gamma1 = ((gamma1x << 15) | (gamma1x >>> 17)) ^
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((gamma1x << 13) | (gamma1x >>> 19)) ^
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(gamma1x >>> 10);
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W[i] = gamma0 + W[i - 7] + gamma1 + W[i - 16];
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}
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var ch = (e & f) ^ (~e & g);
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var maj = (a & b) ^ (a & c) ^ (b & c);
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var sigma0 = ((a << 30) | (a >>> 2)) ^ ((a << 19) | (a >>> 13)) ^ ((a << 10) | (a >>> 22));
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var sigma1 = ((e << 26) | (e >>> 6)) ^ ((e << 21) | (e >>> 11)) ^ ((e << 7) | (e >>> 25));
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var t1 = h + sigma1 + ch + K[i] + W[i];
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var t2 = sigma0 + maj;
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h = g;
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g = f;
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f = e;
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e = (d + t1) | 0;
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d = c;
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c = b;
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b = a;
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a = (t1 + t2) | 0;
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}
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// Intermediate hash value
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H[0] = (H[0] + a) | 0;
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H[1] = (H[1] + b) | 0;
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H[2] = (H[2] + c) | 0;
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H[3] = (H[3] + d) | 0;
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H[4] = (H[4] + e) | 0;
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H[5] = (H[5] + f) | 0;
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H[6] = (H[6] + g) | 0;
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H[7] = (H[7] + h) | 0;
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},
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_doFinalize: function () {
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// Shortcuts
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var data = this._data;
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var dataWords = data.words;
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|
var nBitsTotal = this._nDataBytes * 8;
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var nBitsLeft = data.sigBytes * 8;
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// Add padding
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dataWords[nBitsLeft >>> 5] |= 0x80 << (24 - nBitsLeft % 32);
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dataWords[(((nBitsLeft + 64) >>> 9) << 4) + 14] = Math.floor(nBitsTotal / 0x100000000);
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dataWords[(((nBitsLeft + 64) >>> 9) << 4) + 15] = nBitsTotal;
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data.sigBytes = dataWords.length * 4;
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|
// Hash final blocks
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this._process();
|
|
// Return final computed hash
|
return this._hash;
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},
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|
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));
|
|
|
return CryptoJS.SHA256;
|
|
}));
|
