创建

node_modules/crypto-js/mode-ctr.js

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+;(function (root, factory, undef) {
+	if (typeof exports === "object") {
+		// CommonJS
+		module.exports = exports = factory(require("./core"), require("./cipher-core"));
+	}
+	else if (typeof define === "function" && define.amd) {
+		// AMD
+		define(["./core", "./cipher-core"], factory);
+	}
+	else {
+		// Global (browser)
+		factory(root.CryptoJS);
+	}
+}(this, function (CryptoJS) {
+
+	/**
+	 * Counter block mode.
+	 */
+	CryptoJS.mode.CTR = (function () {
+	    var CTR = CryptoJS.lib.BlockCipherMode.extend();
+
+	    var Encryptor = CTR.Encryptor = CTR.extend({
+	        processBlock: function (words, offset) {
+	            // Shortcuts
+	            var cipher = this._cipher
+	            var blockSize = cipher.blockSize;
+	            var iv = this._iv;
+	            var counter = this._counter;
+
+	            // Generate keystream
+	            if (iv) {
+	                counter = this._counter = iv.slice(0);
+
+	                // Remove IV for subsequent blocks
+	                this._iv = undefined;
+	            }
+	            var keystream = counter.slice(0);
+	            cipher.encryptBlock(keystream, 0);
+
+	            // Increment counter
+	            counter[blockSize - 1] = (counter[blockSize - 1] + 1) | 0
+
+	            // Encrypt
+	            for (var i = 0; i < blockSize; i++) {
+	                words[offset + i] ^= keystream[i];
+	            }
+	        }
+	    });
+
+	    CTR.Decryptor = Encryptor;
+
+	    return CTR;
+	}());
+
+
+	return CryptoJS.mode.CTR;
+
+}));