创建

node_modules/crypto-js/pbkdf2.js

@@ -0,0 +1,145 @@
+;(function (root, factory, undef) {
+	if (typeof exports === "object") {
+		// CommonJS
+		module.exports = exports = factory(require("./core"), require("./sha256"), require("./hmac"));
+	}
+	else if (typeof define === "function" && define.amd) {
+		// AMD
+		define(["./core", "./sha256", "./hmac"], factory);
+	}
+	else {
+		// Global (browser)
+		factory(root.CryptoJS);
+	}
+}(this, function (CryptoJS) {
+
+	(function () {
+	    // Shortcuts
+	    var C = CryptoJS;
+	    var C_lib = C.lib;
+	    var Base = C_lib.Base;
+	    var WordArray = C_lib.WordArray;
+	    var C_algo = C.algo;
+	    var SHA256 = C_algo.SHA256;
+	    var HMAC = C_algo.HMAC;
+
+	    /**
+	     * Password-Based Key Derivation Function 2 algorithm.
+	     */
+	    var PBKDF2 = C_algo.PBKDF2 = Base.extend({
+	        /**
+	         * Configuration options.
+	         *
+	         * @property {number} keySize The key size in words to generate. Default: 4 (128 bits)
+	         * @property {Hasher} hasher The hasher to use. Default: SHA256
+	         * @property {number} iterations The number of iterations to perform. Default: 250000
+	         */
+	        cfg: Base.extend({
+	            keySize: 128/32,
+	            hasher: SHA256,
+	            iterations: 250000
+	        }),
+
+	        /**
+	         * Initializes a newly created key derivation function.
+	         *
+	         * @param {Object} cfg (Optional) The configuration options to use for the derivation.
+	         *
+	         * @example
+	         *
+	         *     var kdf = CryptoJS.algo.PBKDF2.create();
+	         *     var kdf = CryptoJS.algo.PBKDF2.create({ keySize: 8 });
+	         *     var kdf = CryptoJS.algo.PBKDF2.create({ keySize: 8, iterations: 1000 });
+	         */
+	        init: function (cfg) {
+	            this.cfg = this.cfg.extend(cfg);
+	        },
+
+	        /**
+	         * Computes the Password-Based Key Derivation Function 2.
+	         *
+	         * @param {WordArray|string} password The password.
+	         * @param {WordArray|string} salt A salt.
+	         *
+	         * @return {WordArray} The derived key.
+	         *
+	         * @example
+	         *
+	         *     var key = kdf.compute(password, salt);
+	         */
+	        compute: function (password, salt) {
+	            // Shortcut
+	            var cfg = this.cfg;
+
+	            // Init HMAC
+	            var hmac = HMAC.create(cfg.hasher, password);
+
+	            // Initial values
+	            var derivedKey = WordArray.create();
+	            var blockIndex = WordArray.create([0x00000001]);
+
+	            // Shortcuts
+	            var derivedKeyWords = derivedKey.words;
+	            var blockIndexWords = blockIndex.words;
+	            var keySize = cfg.keySize;
+	            var iterations = cfg.iterations;
+
+	            // Generate key
+	            while (derivedKeyWords.length < keySize) {
+	                var block = hmac.update(salt).finalize(blockIndex);
+	                hmac.reset();
+
+	                // Shortcuts
+	                var blockWords = block.words;
+	                var blockWordsLength = blockWords.length;
+
+	                // Iterations
+	                var intermediate = block;
+	                for (var i = 1; i < iterations; i++) {
+	                    intermediate = hmac.finalize(intermediate);
+	                    hmac.reset();
+
+	                    // Shortcut
+	                    var intermediateWords = intermediate.words;
+
+	                    // XOR intermediate with block
+	                    for (var j = 0; j < blockWordsLength; j++) {
+	                        blockWords[j] ^= intermediateWords[j];
+	                    }
+	                }
+
+	                derivedKey.concat(block);
+	                blockIndexWords[0]++;
+	            }
+	            derivedKey.sigBytes = keySize * 4;
+
+	            return derivedKey;
+	        }
+	    });
+
+	    /**
+	     * Computes the Password-Based Key Derivation Function 2.
+	     *
+	     * @param {WordArray|string} password The password.
+	     * @param {WordArray|string} salt A salt.
+	     * @param {Object} cfg (Optional) The configuration options to use for this computation.
+	     *
+	     * @return {WordArray} The derived key.
+	     *
+	     * @static
+	     *
+	     * @example
+	     *
+	     *     var key = CryptoJS.PBKDF2(password, salt);
+	     *     var key = CryptoJS.PBKDF2(password, salt, { keySize: 8 });
+	     *     var key = CryptoJS.PBKDF2(password, salt, { keySize: 8, iterations: 1000 });
+	     */
+	    C.PBKDF2 = function (password, salt, cfg) {
+	        return PBKDF2.create(cfg).compute(password, salt);
+	    };
+	}());
+
+
+	return CryptoJS.PBKDF2;
+
+}));