713 lines
21 KiB
JavaScript
713 lines
21 KiB
JavaScript
/*
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CryptoJS v3.1.2
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code.google.com/p/crypto-js
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(c) 2009-2013 by Jeff Mott. All rights reserved.
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code.google.com/p/crypto-js/wiki/License
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*/
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/**
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* CryptoJS core components.
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*/
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var CryptoJS = CryptoJS || (function (Math, undefined) {
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/**
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* CryptoJS namespace.
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*/
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var C = {};
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/**
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* Library namespace.
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*/
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var C_lib = C.lib = {};
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/**
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* Base object for prototypal inheritance.
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*/
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var Base = C_lib.Base = (function () {
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function F() {}
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return {
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/**
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* Creates a new object that inherits from this object.
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*
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* @param {Object} overrides Properties to copy into the new object.
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*
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* @return {Object} The new object.
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*
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* @static
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*
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* @example
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*
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* var MyType = CryptoJS.lib.Base.extend({
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* field: 'value',
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*
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* method: function () {
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* }
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* });
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*/
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extend: function (overrides) {
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// Spawn
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F.prototype = this;
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var subtype = new F();
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// Augment
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if (overrides) {
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subtype.mixIn(overrides);
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}
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// Create default initializer
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if (!subtype.hasOwnProperty('init')) {
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subtype.init = function () {
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subtype.$super.init.apply(this, arguments);
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};
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}
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// Initializer's prototype is the subtype object
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subtype.init.prototype = subtype;
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// Reference supertype
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subtype.$super = this;
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return subtype;
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},
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/**
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* Extends this object and runs the init method.
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* Arguments to create() will be passed to init().
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*
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* @return {Object} The new object.
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*
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* @static
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*
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* @example
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*
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* var instance = MyType.create();
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*/
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create: function () {
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var instance = this.extend();
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instance.init.apply(instance, arguments);
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return instance;
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},
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/**
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* Initializes a newly created object.
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* Override this method to add some logic when your objects are created.
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*
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* @example
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*
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* var MyType = CryptoJS.lib.Base.extend({
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* init: function () {
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* // ...
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* }
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* });
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*/
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init: function () {
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},
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/**
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* Copies properties into this object.
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*
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* @param {Object} properties The properties to mix in.
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*
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* @example
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*
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* MyType.mixIn({
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* field: 'value'
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* });
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*/
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mixIn: function (properties) {
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for (var propertyName in properties) {
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if (properties.hasOwnProperty(propertyName)) {
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this[propertyName] = properties[propertyName];
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}
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}
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// IE won't copy toString using the loop above
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if (properties.hasOwnProperty('toString')) {
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this.toString = properties.toString;
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}
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},
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/**
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* Creates a copy of this object.
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*
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* @return {Object} The clone.
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*
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* @example
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*
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* var clone = instance.clone();
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*/
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clone: function () {
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return this.init.prototype.extend(this);
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}
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};
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}());
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/**
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* An array of 32-bit words.
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*
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* @property {Array} words The array of 32-bit words.
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* @property {number} sigBytes The number of significant bytes in this word array.
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*/
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var WordArray = C_lib.WordArray = Base.extend({
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/**
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* Initializes a newly created word array.
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*
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* @param {Array} words (Optional) An array of 32-bit words.
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* @param {number} sigBytes (Optional) The number of significant bytes in the words.
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*
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* @example
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*
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* var wordArray = CryptoJS.lib.WordArray.create();
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* var wordArray = CryptoJS.lib.WordArray.create([0x00010203, 0x04050607]);
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* var wordArray = CryptoJS.lib.WordArray.create([0x00010203, 0x04050607], 6);
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*/
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init: function (words, sigBytes) {
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words = this.words = words || [];
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if (sigBytes != undefined) {
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this.sigBytes = sigBytes;
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} else {
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this.sigBytes = words.length * 4;
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}
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},
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/**
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* Converts this word array to a string.
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*
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* @param {Encoder} encoder (Optional) The encoding strategy to use. Default: CryptoJS.enc.Hex
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*
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* @return {string} The stringified word array.
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*
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* @example
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*
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* var string = wordArray + '';
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* var string = wordArray.toString();
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* var string = wordArray.toString(CryptoJS.enc.Utf8);
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*/
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toString: function (encoder) {
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return (encoder || Hex).stringify(this);
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},
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/**
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* Concatenates a word array to this word array.
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*
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* @param {WordArray} wordArray The word array to append.
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*
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* @return {WordArray} This word array.
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*
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* @example
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*
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* wordArray1.concat(wordArray2);
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*/
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concat: function (wordArray) {
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// Shortcuts
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var thisWords = this.words;
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var thatWords = wordArray.words;
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var thisSigBytes = this.sigBytes;
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var thatSigBytes = wordArray.sigBytes;
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// Clamp excess bits
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this.clamp();
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// Concat
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if (thisSigBytes % 4) {
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// Copy one byte at a time
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for (var i = 0; i < thatSigBytes; i++) {
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var thatByte = (thatWords[i >>> 2] >>> (24 - (i % 4) * 8)) & 0xff;
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thisWords[(thisSigBytes + i) >>> 2] |= thatByte << (24 - ((thisSigBytes + i) % 4) * 8);
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}
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} else if (thatWords.length > 0xffff) {
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// Copy one word at a time
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for (var i = 0; i < thatSigBytes; i += 4) {
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thisWords[(thisSigBytes + i) >>> 2] = thatWords[i >>> 2];
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}
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} else {
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// Copy all words at once
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thisWords.push.apply(thisWords, thatWords);
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}
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this.sigBytes += thatSigBytes;
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// Chainable
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return this;
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},
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/**
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* Removes insignificant bits.
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*
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* @example
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*
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* wordArray.clamp();
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*/
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clamp: function () {
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// Shortcuts
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var words = this.words;
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var sigBytes = this.sigBytes;
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// Clamp
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words[sigBytes >>> 2] &= 0xffffffff << (32 - (sigBytes % 4) * 8);
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words.length = Math.ceil(sigBytes / 4);
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},
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/**
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* Creates a copy of this word array.
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*
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* @return {WordArray} The clone.
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*
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* @example
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*
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* var clone = wordArray.clone();
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*/
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clone: function () {
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var clone = Base.clone.call(this);
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clone.words = this.words.slice(0);
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return clone;
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},
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/**
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* Creates a word array filled with random bytes.
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*
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* @param {number} nBytes The number of random bytes to generate.
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*
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* @return {WordArray} The random word array.
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*
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* @static
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*
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* @example
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*
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* var wordArray = CryptoJS.lib.WordArray.random(16);
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*/
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random: function (nBytes) {
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var words = [];
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for (var i = 0; i < nBytes; i += 4) {
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words.push((Math.random() * 0x100000000) | 0);
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}
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return new WordArray.init(words, nBytes);
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}
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});
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/**
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* Encoder namespace.
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*/
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var C_enc = C.enc = {};
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/**
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* Hex encoding strategy.
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*/
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var Hex = C_enc.Hex = {
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/**
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* Converts a word array to a hex string.
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*
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* @param {WordArray} wordArray The word array.
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*
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* @return {string} The hex string.
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*
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* @static
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*
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* @example
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*
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* var hexString = CryptoJS.enc.Hex.stringify(wordArray);
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*/
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stringify: function (wordArray) {
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// Shortcuts
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var words = wordArray.words;
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var sigBytes = wordArray.sigBytes;
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// Convert
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var hexChars = [];
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for (var i = 0; i < sigBytes; i++) {
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var bite = (words[i >>> 2] >>> (24 - (i % 4) * 8)) & 0xff;
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hexChars.push((bite >>> 4).toString(16));
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hexChars.push((bite & 0x0f).toString(16));
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}
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return hexChars.join('');
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},
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/**
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* Converts a hex string to a word array.
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*
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* @param {string} hexStr The hex string.
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*
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* @return {WordArray} The word array.
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*
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* @static
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*
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* @example
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*
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* var wordArray = CryptoJS.enc.Hex.parse(hexString);
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*/
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parse: function (hexStr) {
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// Shortcut
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var hexStrLength = hexStr.length;
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// Convert
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var words = [];
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for (var i = 0; i < hexStrLength; i += 2) {
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words[i >>> 3] |= parseInt(hexStr.substr(i, 2), 16) << (24 - (i % 8) * 4);
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}
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return new WordArray.init(words, hexStrLength / 2);
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}
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};
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/**
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* Latin1 encoding strategy.
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*/
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var Latin1 = C_enc.Latin1 = {
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/**
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* Converts a word array to a Latin1 string.
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*
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* @param {WordArray} wordArray The word array.
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*
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* @return {string} The Latin1 string.
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*
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* @static
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*
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* @example
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*
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* var latin1String = CryptoJS.enc.Latin1.stringify(wordArray);
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*/
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stringify: function (wordArray) {
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// Shortcuts
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var words = wordArray.words;
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var sigBytes = wordArray.sigBytes;
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// Convert
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var latin1Chars = [];
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for (var i = 0; i < sigBytes; i++) {
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var bite = (words[i >>> 2] >>> (24 - (i % 4) * 8)) & 0xff;
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latin1Chars.push(String.fromCharCode(bite));
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}
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return latin1Chars.join('');
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},
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/**
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* Converts a Latin1 string to a word array.
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*
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* @param {string} latin1Str The Latin1 string.
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*
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* @return {WordArray} The word array.
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*
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* @static
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*
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* @example
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*
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* var wordArray = CryptoJS.enc.Latin1.parse(latin1String);
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*/
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parse: function (latin1Str) {
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// Shortcut
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var latin1StrLength = latin1Str.length;
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// Convert
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var words = [];
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for (var i = 0; i < latin1StrLength; i++) {
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words[i >>> 2] |= (latin1Str.charCodeAt(i) & 0xff) << (24 - (i % 4) * 8);
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}
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return new WordArray.init(words, latin1StrLength);
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}
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};
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/**
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* UTF-8 encoding strategy.
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*/
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var Utf8 = C_enc.Utf8 = {
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/**
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* Converts a word array to a UTF-8 string.
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*
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* @param {WordArray} wordArray The word array.
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*
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* @return {string} The UTF-8 string.
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*
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* @static
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*
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* @example
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*
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* var utf8String = CryptoJS.enc.Utf8.stringify(wordArray);
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*/
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stringify: function (wordArray) {
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try {
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return decodeURIComponent(escape(Latin1.stringify(wordArray)));
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} catch (e) {
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throw new Error('Malformed UTF-8 data');
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}
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},
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/**
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* Converts a UTF-8 string to a word array.
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*
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* @param {string} utf8Str The UTF-8 string.
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*
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* @return {WordArray} The word array.
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*
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* @static
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*
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* @example
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*
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* var wordArray = CryptoJS.enc.Utf8.parse(utf8String);
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*/
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parse: function (utf8Str) {
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return Latin1.parse(unescape(encodeURIComponent(utf8Str)));
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}
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};
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/**
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* Abstract buffered block algorithm template.
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*
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* The property blockSize must be implemented in a concrete subtype.
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*
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* @property {number} _minBufferSize The number of blocks that should be kept unprocessed in the buffer. Default: 0
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*/
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var BufferedBlockAlgorithm = C_lib.BufferedBlockAlgorithm = Base.extend({
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/**
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* Resets this block algorithm's data buffer to its initial state.
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*
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* @example
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*
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* bufferedBlockAlgorithm.reset();
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*/
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reset: function () {
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// Initial values
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this._data = new WordArray.init();
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this._nDataBytes = 0;
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},
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/**
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* Adds new data to this block algorithm's buffer.
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*
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* @param {WordArray|string} data The data to append. Strings are converted to a WordArray using UTF-8.
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*
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* @example
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*
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* bufferedBlockAlgorithm._append('data');
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* bufferedBlockAlgorithm._append(wordArray);
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*/
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_append: function (data) {
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// Convert string to WordArray, else assume WordArray already
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if (typeof data == 'string') {
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data = Utf8.parse(data);
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}
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// Append
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this._data.concat(data);
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this._nDataBytes += data.sigBytes;
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},
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/**
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* Processes available data blocks.
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*
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* This method invokes _doProcessBlock(offset), which must be implemented by a concrete subtype.
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*
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* @param {boolean} doFlush Whether all blocks and partial blocks should be processed.
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*
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* @return {WordArray} The processed data.
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*
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* @example
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*
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* var processedData = bufferedBlockAlgorithm._process();
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* var processedData = bufferedBlockAlgorithm._process(!!'flush');
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*/
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_process: function (doFlush) {
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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 dataSigBytes = data.sigBytes;
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var blockSize = this.blockSize;
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var blockSizeBytes = blockSize * 4;
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// Count blocks ready
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var nBlocksReady = dataSigBytes / blockSizeBytes;
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if (doFlush) {
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// Round up to include partial blocks
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nBlocksReady = Math.ceil(nBlocksReady);
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} else {
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// Round down to include only full blocks,
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// less the number of blocks that must remain in the buffer
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nBlocksReady = Math.max((nBlocksReady | 0) - this._minBufferSize, 0);
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}
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// Count words ready
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var nWordsReady = nBlocksReady * blockSize;
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// Count bytes ready
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var nBytesReady = Math.min(nWordsReady * 4, dataSigBytes);
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// Process blocks
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if (nWordsReady) {
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for (var offset = 0; offset < nWordsReady; offset += blockSize) {
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// Perform concrete-algorithm logic
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this._doProcessBlock(dataWords, offset);
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}
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// Remove processed words
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var processedWords = dataWords.splice(0, nWordsReady);
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data.sigBytes -= nBytesReady;
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}
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// Return processed words
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return new WordArray.init(processedWords, nBytesReady);
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},
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/**
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* Creates a copy of this object.
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*
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* @return {Object} The clone.
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*
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* @example
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*
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* var clone = bufferedBlockAlgorithm.clone();
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*/
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clone: function () {
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var clone = Base.clone.call(this);
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clone._data = this._data.clone();
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return clone;
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},
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_minBufferSize: 0
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});
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/**
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* Abstract hasher template.
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*
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* @property {number} blockSize The number of 32-bit words this hasher operates on. Default: 16 (512 bits)
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*/
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var Hasher = C_lib.Hasher = BufferedBlockAlgorithm.extend({
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/**
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* Configuration options.
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*/
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cfg: Base.extend(),
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/**
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* Initializes a newly created hasher.
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*
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* @param {Object} cfg (Optional) The configuration options to use for this hash computation.
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*
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* @example
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*
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* var hasher = CryptoJS.algo.SHA256.create();
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*/
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init: function (cfg) {
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// Apply config defaults
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this.cfg = this.cfg.extend(cfg);
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// Set initial values
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this.reset();
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},
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/**
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* Resets this hasher to its initial state.
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*
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|
* @example
|
|
*
|
|
* hasher.reset();
|
|
*/
|
|
reset: function () {
|
|
// Reset data buffer
|
|
BufferedBlockAlgorithm.reset.call(this);
|
|
|
|
// Perform concrete-hasher logic
|
|
this._doReset();
|
|
},
|
|
|
|
/**
|
|
* Updates this hasher with a message.
|
|
*
|
|
* @param {WordArray|string} messageUpdate The message to append.
|
|
*
|
|
* @return {Hasher} This hasher.
|
|
*
|
|
* @example
|
|
*
|
|
* hasher.update('message');
|
|
* hasher.update(wordArray);
|
|
*/
|
|
update: function (messageUpdate) {
|
|
// Append
|
|
this._append(messageUpdate);
|
|
|
|
// Update the hash
|
|
this._process();
|
|
|
|
// Chainable
|
|
return this;
|
|
},
|
|
|
|
/**
|
|
* Finalizes the hash computation.
|
|
* Note that the finalize operation is effectively a destructive, read-once operation.
|
|
*
|
|
* @param {WordArray|string} messageUpdate (Optional) A final message update.
|
|
*
|
|
* @return {WordArray} The hash.
|
|
*
|
|
* @example
|
|
*
|
|
* var hash = hasher.finalize();
|
|
* var hash = hasher.finalize('message');
|
|
* var hash = hasher.finalize(wordArray);
|
|
*/
|
|
finalize: function (messageUpdate) {
|
|
// Final message update
|
|
if (messageUpdate) {
|
|
this._append(messageUpdate);
|
|
}
|
|
|
|
// Perform concrete-hasher logic
|
|
var hash = this._doFinalize();
|
|
|
|
return hash;
|
|
},
|
|
|
|
blockSize: 512/32,
|
|
|
|
/**
|
|
* Creates a shortcut function to a hasher's object interface.
|
|
*
|
|
* @param {Hasher} hasher The hasher to create a helper for.
|
|
*
|
|
* @return {Function} The shortcut function.
|
|
*
|
|
* @static
|
|
*
|
|
* @example
|
|
*
|
|
* var SHA256 = CryptoJS.lib.Hasher._createHelper(CryptoJS.algo.SHA256);
|
|
*/
|
|
_createHelper: function (hasher) {
|
|
return function (message, cfg) {
|
|
return new hasher.init(cfg).finalize(message);
|
|
};
|
|
},
|
|
|
|
/**
|
|
* Creates a shortcut function to the HMAC's object interface.
|
|
*
|
|
* @param {Hasher} hasher The hasher to use in this HMAC helper.
|
|
*
|
|
* @return {Function} The shortcut function.
|
|
*
|
|
* @static
|
|
*
|
|
* @example
|
|
*
|
|
* var HmacSHA256 = CryptoJS.lib.Hasher._createHmacHelper(CryptoJS.algo.SHA256);
|
|
*/
|
|
_createHmacHelper: function (hasher) {
|
|
return function (message, key) {
|
|
return new C_algo.HMAC.init(hasher, key).finalize(message);
|
|
};
|
|
}
|
|
});
|
|
|
|
/**
|
|
* Algorithm namespace.
|
|
*/
|
|
var C_algo = C.algo = {};
|
|
|
|
return C;
|
|
}(Math));
|