创建

node_modules/crypto-js/hmac.js

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+;(function (root, factory) {
+	if (typeof exports === "object") {
+		// CommonJS
+		module.exports = exports = factory(require("./core"));
+	}
+	else if (typeof define === "function" && define.amd) {
+		// AMD
+		define(["./core"], 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 C_enc = C.enc;
+	    var Utf8 = C_enc.Utf8;
+	    var C_algo = C.algo;
+
+	    /**
+	     * HMAC algorithm.
+	     */
+	    var HMAC = C_algo.HMAC = Base.extend({
+	        /**
+	         * Initializes a newly created HMAC.
+	         *
+	         * @param {Hasher} hasher The hash algorithm to use.
+	         * @param {WordArray|string} key The secret key.
+	         *
+	         * @example
+	         *
+	         *     var hmacHasher = CryptoJS.algo.HMAC.create(CryptoJS.algo.SHA256, key);
+	         */
+	        init: function (hasher, key) {
+	            // Init hasher
+	            hasher = this._hasher = new hasher.init();
+
+	            // Convert string to WordArray, else assume WordArray already
+	            if (typeof key == 'string') {
+	                key = Utf8.parse(key);
+	            }
+
+	            // Shortcuts
+	            var hasherBlockSize = hasher.blockSize;
+	            var hasherBlockSizeBytes = hasherBlockSize * 4;
+
+	            // Allow arbitrary length keys
+	            if (key.sigBytes > hasherBlockSizeBytes) {
+	                key = hasher.finalize(key);
+	            }
+
+	            // Clamp excess bits
+	            key.clamp();
+
+	            // Clone key for inner and outer pads
+	            var oKey = this._oKey = key.clone();
+	            var iKey = this._iKey = key.clone();
+
+	            // Shortcuts
+	            var oKeyWords = oKey.words;
+	            var iKeyWords = iKey.words;
+
+	            // XOR keys with pad constants
+	            for (var i = 0; i < hasherBlockSize; i++) {
+	                oKeyWords[i] ^= 0x5c5c5c5c;
+	                iKeyWords[i] ^= 0x36363636;
+	            }
+	            oKey.sigBytes = iKey.sigBytes = hasherBlockSizeBytes;
+
+	            // Set initial values
+	            this.reset();
+	        },
+
+	        /**
+	         * Resets this HMAC to its initial state.
+	         *
+	         * @example
+	         *
+	         *     hmacHasher.reset();
+	         */
+	        reset: function () {
+	            // Shortcut
+	            var hasher = this._hasher;
+
+	            // Reset
+	            hasher.reset();
+	            hasher.update(this._iKey);
+	        },
+
+	        /**
+	         * Updates this HMAC with a message.
+	         *
+	         * @param {WordArray|string} messageUpdate The message to append.
+	         *
+	         * @return {HMAC} This HMAC instance.
+	         *
+	         * @example
+	         *
+	         *     hmacHasher.update('message');
+	         *     hmacHasher.update(wordArray);
+	         */
+	        update: function (messageUpdate) {
+	            this._hasher.update(messageUpdate);
+
+	            // Chainable
+	            return this;
+	        },
+
+	        /**
+	         * Finalizes the HMAC 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 HMAC.
+	         *
+	         * @example
+	         *
+	         *     var hmac = hmacHasher.finalize();
+	         *     var hmac = hmacHasher.finalize('message');
+	         *     var hmac = hmacHasher.finalize(wordArray);
+	         */
+	        finalize: function (messageUpdate) {
+	            // Shortcut
+	            var hasher = this._hasher;
+
+	            // Compute HMAC
+	            var innerHash = hasher.finalize(messageUpdate);
+	            hasher.reset();
+	            var hmac = hasher.finalize(this._oKey.clone().concat(innerHash));
+
+	            return hmac;
+	        }
+	    });
+	}());
+
+
+}));