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- {"ast":null,"code":";\n(function (root, factory, undef) {\n if (typeof exports === \"object\") {\n // CommonJS\n module.exports = exports = factory(require(\"./core\"), require(\"./enc-base64\"), require(\"./md5\"), require(\"./evpkdf\"), require(\"./cipher-core\"));\n } else if (typeof define === \"function\" && define.amd) {\n // AMD\n define([\"./core\", \"./enc-base64\", \"./md5\", \"./evpkdf\", \"./cipher-core\"], factory);\n } else {\n // Global (browser)\n factory(root.CryptoJS);\n }\n})(this, function (CryptoJS) {\n (function () {\n // Shortcuts\n var C = CryptoJS;\n var C_lib = C.lib;\n var StreamCipher = C_lib.StreamCipher;\n var C_algo = C.algo;\n\n /**\n * RC4 stream cipher algorithm.\n */\n var RC4 = C_algo.RC4 = StreamCipher.extend({\n _doReset: function () {\n // Shortcuts\n var key = this._key;\n var keyWords = key.words;\n var keySigBytes = key.sigBytes;\n\n // Init sbox\n var S = this._S = [];\n for (var i = 0; i < 256; i++) {\n S[i] = i;\n }\n\n // Key setup\n for (var i = 0, j = 0; i < 256; i++) {\n var keyByteIndex = i % keySigBytes;\n var keyByte = keyWords[keyByteIndex >>> 2] >>> 24 - keyByteIndex % 4 * 8 & 0xff;\n j = (j + S[i] + keyByte) % 256;\n\n // Swap\n var t = S[i];\n S[i] = S[j];\n S[j] = t;\n }\n\n // Counters\n this._i = this._j = 0;\n },\n _doProcessBlock: function (M, offset) {\n M[offset] ^= generateKeystreamWord.call(this);\n },\n keySize: 256 / 32,\n ivSize: 0\n });\n function generateKeystreamWord() {\n // Shortcuts\n var S = this._S;\n var i = this._i;\n var j = this._j;\n\n // Generate keystream word\n var keystreamWord = 0;\n for (var n = 0; n < 4; n++) {\n i = (i + 1) % 256;\n j = (j + S[i]) % 256;\n\n // Swap\n var t = S[i];\n S[i] = S[j];\n S[j] = t;\n keystreamWord |= S[(S[i] + S[j]) % 256] << 24 - n * 8;\n }\n\n // Update counters\n this._i = i;\n this._j = j;\n return keystreamWord;\n }\n\n /**\n * Shortcut functions to the cipher's object interface.\n *\n * @example\n *\n * var ciphertext = CryptoJS.RC4.encrypt(message, key, cfg);\n * var plaintext = CryptoJS.RC4.decrypt(ciphertext, key, cfg);\n */\n C.RC4 = StreamCipher._createHelper(RC4);\n\n /**\n * Modified RC4 stream cipher algorithm.\n */\n var RC4Drop = C_algo.RC4Drop = RC4.extend({\n /**\n * Configuration options.\n *\n * @property {number} drop The number of keystream words to drop. 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